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<html><head><title>dlib C++ Library - pngpread.c</title></head><body bgcolor='white'><pre> |
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<font color='#009900'>/* pngpread.c - read a png file in push mode |
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* |
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* Last changed in libpng 1.6.0 [February 14, 2013] |
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* Copyright (c) 1998-2013 Glenn Randers-Pehrson |
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* (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) |
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* (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) |
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* |
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* This code is released under the libpng license. |
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* For conditions of distribution and use, see the disclaimer |
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* and license in png.h |
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*/</font> |
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<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='pngpriv.h.html'>pngpriv.h</a>" |
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<font color='#0000FF'>#ifdef</font> PNG_PROGRESSIVE_READ_SUPPORTED |
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<font color='#009900'>/* Push model modes */</font> |
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<font color='#0000FF'>#define</font> PNG_READ_SIG_MODE <font color='#979000'>0</font> |
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<font color='#0000FF'>#define</font> PNG_READ_CHUNK_MODE <font color='#979000'>1</font> |
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<font color='#0000FF'>#define</font> PNG_READ_IDAT_MODE <font color='#979000'>2</font> |
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<font color='#0000FF'>#define</font> PNG_SKIP_MODE <font color='#979000'>3</font> |
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<font color='#0000FF'>#define</font> PNG_READ_tEXt_MODE <font color='#979000'>4</font> |
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<font color='#0000FF'>#define</font> PNG_READ_zTXt_MODE <font color='#979000'>5</font> |
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<font color='#0000FF'>#define</font> PNG_READ_DONE_MODE <font color='#979000'>6</font> |
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<font color='#0000FF'>#define</font> PNG_READ_iTXt_MODE <font color='#979000'>7</font> |
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<font color='#0000FF'>#define</font> PNG_ERROR_MODE <font color='#979000'>8</font> |
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<font color='#0000FF'><u>void</u></font> PNGAPI |
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<b><a name='png_process_data'></a>png_process_data</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr, |
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png_bytep buffer, png_size_t buffer_size<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>|</font><font color='#5555FF'>|</font> info_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font>; |
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<font color='#BB00BB'>png_push_restore_buffer</font><font face='Lucida Console'>(</font>png_ptr, buffer, buffer_size<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#BB00BB'>png_process_some_data</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<b>}</b> |
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png_size_t PNGAPI |
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<b><a name='png_process_data_pause'></a>png_process_data_pause</b><font face='Lucida Console'>(</font>png_structrp png_ptr, <font color='#0000FF'><u>int</u></font> save<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#009900'>/* It's easiest for the caller if we do the save, then the caller doesn't |
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* have to supply the same data again: |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>save<font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>else</font> |
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<b>{</b> |
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<font color='#009900'>/* This includes any pending saved bytes: */</font> |
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png_size_t remaining <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
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<font color='#009900'>/* So subtract the saved buffer size, unless all the data |
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* is actually 'saved', in which case we just return 0 |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'><</font> remaining<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font> remaining <font color='#5555FF'>-</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
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<b>}</b> |
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<b>}</b> |
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<font color='#0000FF'>return</font> <font color='#979000'>0</font>; |
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<b>}</b> |
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png_uint_32 PNGAPI |
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<b><a name='png_process_data_skip'></a>png_process_data_skip</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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png_uint_32 remaining <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font><font color='#5555FF'>=</font> PNG_SKIP_MODE <font color='#5555FF'>&</font><font color='#5555FF'>&</font> |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#009900'>/* At the end of png_process_data the buffer size must be 0 (see the loop |
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* above) so we can detect a broken call here: |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, |
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"<font color='#CC0000'>png_process_data_skip called inside png_process_data</font>"<font face='Lucida Console'>)</font>; |
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<font color='#009900'>/* If is impossible for there to be a saved buffer at this point - |
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* otherwise we could not be in SKIP mode. This will also happen if |
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* png_process_skip is called inside png_process_data (but only very |
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* rarely.) |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>png_process_data_skip called with saved data</font>"<font face='Lucida Console'>)</font>; |
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remaining <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_CHUNK_MODE; |
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<b>}</b> |
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<font color='#0000FF'>return</font> remaining; |
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<b>}</b> |
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<font color='#009900'>/* What we do with the incoming data depends on what we were previously |
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* doing before we ran out of data... |
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*/</font> |
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<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
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<b><a name='png_process_some_data'></a>png_process_some_data</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font>; |
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<font color='#0000FF'>switch</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>case</font> PNG_READ_SIG_MODE: |
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<b>{</b> |
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<font color='#BB00BB'>png_push_read_sig</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>break</font>; |
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<b>}</b> |
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<font color='#0000FF'>case</font> PNG_READ_CHUNK_MODE: |
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<b>{</b> |
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<font color='#BB00BB'>png_push_read_chunk</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>break</font>; |
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<b>}</b> |
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<font color='#0000FF'>case</font> PNG_READ_IDAT_MODE: |
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<b>{</b> |
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<font color='#BB00BB'>png_push_read_IDAT</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>break</font>; |
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<b>}</b> |
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<font color='#0000FF'>case</font> PNG_SKIP_MODE: |
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<b>{</b> |
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<font color='#BB00BB'>png_push_crc_finish</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>break</font>; |
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<b>}</b> |
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<font color='#0000FF'>default</font>: |
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<b>{</b> |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
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<font color='#0000FF'>break</font>; |
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<b>}</b> |
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<b>}</b> |
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<b>}</b> |
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<font color='#009900'>/* Read any remaining signature bytes from the stream and compare them with |
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* the correct PNG signature. It is possible that this routine is called |
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* with bytes already read from the signature, either because they have been |
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* checked by the calling application, or because of multiple calls to this |
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* routine. |
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*/</font> |
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<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
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<b><a name='png_push_read_sig'></a>png_push_read_sig</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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png_size_t num_checked <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>sig_bytes, <font color='#009900'>/* SAFE, does not exceed 8 */</font> |
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num_to_check <font color='#5555FF'>=</font> <font color='#979000'>8</font> <font color='#5555FF'>-</font> num_checked; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'><</font> num_to_check<font face='Lucida Console'>)</font> |
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<b>{</b> |
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num_to_check <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size; |
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<b>}</b> |
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<font color='#BB00BB'>png_push_fill_buffer</font><font face='Lucida Console'>(</font>png_ptr, <font color='#5555FF'>&</font><font face='Lucida Console'>(</font>info_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>signature[num_checked]<font face='Lucida Console'>)</font>, |
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num_to_check<font face='Lucida Console'>)</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>sig_bytes <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_byte<font face='Lucida Console'>)</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>sig_bytes <font color='#5555FF'>+</font> num_to_check<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#BB00BB'>png_sig_cmp</font><font face='Lucida Console'>(</font>info_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>signature, num_checked, num_to_check<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>num_checked <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> |
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<font color='#BB00BB'>png_sig_cmp</font><font face='Lucida Console'>(</font>info_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>signature, num_checked, num_to_check <font color='#5555FF'>-</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Not a PNG file</font>"<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>else</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>PNG file corrupted by ASCII conversion</font>"<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<font color='#0000FF'>else</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>sig_bytes <font color='#5555FF'>></font><font color='#5555FF'>=</font> <font color='#979000'>8</font><font face='Lucida Console'>)</font> |
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<b>{</b> |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_CHUNK_MODE; |
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<b>}</b> |
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<b>}</b> |
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<b>}</b> |
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<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
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<b><a name='png_push_read_chunk'></a>png_push_read_chunk</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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png_uint_32 chunk_name; |
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<font color='#0000FF'>#ifdef</font> PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
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<font color='#0000FF'><u>int</u></font> keep; <font color='#009900'>/* unknown handling method */</font> |
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<font color='#0000FF'>#endif</font> |
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<font color='#009900'>/* First we make sure we have enough data for the 4 byte chunk name |
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* and the 4 byte chunk length before proceeding with decoding the |
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* chunk data. To fully decode each of these chunks, we also make |
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* sure we have enough data in the buffer for the 4 byte CRC at the |
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* end of every chunk (except IDAT, which is handled separately). |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_HAVE_CHUNK_HEADER<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<b>{</b> |
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png_byte chunk_length[<font color='#979000'>4</font>]; |
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png_byte chunk_tag[<font color='#979000'>4</font>]; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'><</font> <font color='#979000'>8</font><font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>return</font>; |
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<b>}</b> |
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<font color='#BB00BB'>png_push_fill_buffer</font><font face='Lucida Console'>(</font>png_ptr, chunk_length, <font color='#979000'>4</font><font face='Lucida Console'>)</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>=</font> <font color='#BB00BB'>png_get_uint_31</font><font face='Lucida Console'>(</font>png_ptr, chunk_length<font face='Lucida Console'>)</font>; |
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<font color='#BB00BB'>png_reset_crc</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
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<font color='#BB00BB'>png_crc_read</font><font face='Lucida Console'>(</font>png_ptr, chunk_tag, <font color='#979000'>4</font><font face='Lucida Console'>)</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font> <font color='#BB00BB'>PNG_CHUNK_FROM_STRING</font><font face='Lucida Console'>(</font>chunk_tag<font face='Lucida Console'>)</font>; |
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<font color='#BB00BB'>png_check_chunk_name</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name<font face='Lucida Console'>)</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_HAVE_CHUNK_HEADER; |
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<b>}</b> |
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chunk_name <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_IDAT<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_AFTER_IDAT<font face='Lucida Console'>)</font> |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_HAVE_CHUNK_AFTER_IDAT; |
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<font color='#009900'>/* If we reach an IDAT chunk, this means we have read all of the |
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* header chunks, and we can start reading the image (or if this |
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* is called after the image has been read - we have an error). |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_HAVE_IHDR<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Missing IHDR before IDAT</font>"<font face='Lucida Console'>)</font>; |
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<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>color_type <font color='#5555FF'>=</font><font color='#5555FF'>=</font> PNG_COLOR_TYPE_PALETTE <font color='#5555FF'>&</font><font color='#5555FF'>&</font> |
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<font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_HAVE_PLTE<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Missing PLTE before IDAT</font>"<font face='Lucida Console'>)</font>; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_HAVE_IDAT; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_HAVE_CHUNK_AFTER_IDAT<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font>; |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_AFTER_IDAT<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_benign_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Too many IDATs found</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_IHDR<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>13</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Invalid IHDR length</font>"<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_IHDR</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_IEND<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_IEND</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_DONE_MODE; |
|
<font color='#BB00BB'>png_push_have_end</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_HANDLE_AS_UNKNOWN_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>keep <font color='#5555FF'>=</font> <font color='#BB00BB'>png_chunk_unknown_handling</font><font face='Lucida Console'>(</font>png_ptr, chunk_name<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_unknown</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length, keep<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_PLTE<font face='Lucida Console'>)</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_HAVE_PLTE; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_PLTE<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
<font color='#BB00BB'>png_handle_PLTE</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_IDAT<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_IDAT_MODE; |
|
<font color='#BB00BB'>png_push_have_info</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_out <font color='#5555FF'>=</font> |
|
<font face='Lucida Console'>(</font>uInt<font face='Lucida Console'>)</font> <font color='#BB00BB'>PNG_ROWBYTES</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pixel_depth, |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>iwidth<font face='Lucida Console'>)</font> <font color='#5555FF'>+</font> <font color='#979000'>1</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.next_out <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_READ_gAMA_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_gAMA<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_gAMA</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_sBIT_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_sBIT<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_sBIT</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_cHRM_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_cHRM<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_cHRM</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_sRGB_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_sRGB<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_sRGB</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_iCCP_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_iCCP<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_iCCP</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_sPLT_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_sPLT<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_sPLT</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_tRNS_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_tRNS<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_tRNS</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_bKGD_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_bKGD<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_bKGD</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_hIST_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_hIST<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_hIST</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_pHYs_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_pHYs<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_pHYs</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_oFFs_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_oFFs<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_oFFs</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<font color='#0000FF'>#endif</font> |
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_READ_pCAL_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_pCAL<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_pCAL</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_sCAL_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_sCAL<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_sCAL</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_tIME_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_tIME<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_tIME</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_tEXt_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_tEXt<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_tEXt</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_zTXt_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_zTXt<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_zTXt</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_iTXt_SUPPORTED |
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>chunk_name <font color='#5555FF'>=</font><font color='#5555FF'>=</font> png_iTXt<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_handle_iTXt</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> |
|
<font color='#0000FF'>else</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>+</font> <font color='#979000'>4</font> <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
<font color='#BB00BB'>png_handle_unknown</font><font face='Lucida Console'>(</font>png_ptr, info_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length, |
|
PNG_HANDLE_CHUNK_AS_DEFAULT<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font><font color='#5555FF'>=</font> ~PNG_HAVE_CHUNK_HEADER; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_crc_skip'></a>png_push_crc_skip</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_uint_32 skip<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_SKIP_MODE; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>=</font> skip; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_crc_finish'></a>png_push_crc_finish</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
|
png_uint_32 skip_length <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length; |
|
|
|
<font color='#009900'>/* We want the smaller of 'skip_length' and 'save_buffer_size', but |
|
* they are of different types and we don't know which variable has the |
|
* fewest bits. Carefully select the smaller and cast it to the type of |
|
* the larger - this cannot overflow. Do not cast in the following test |
|
* - it will break on either 16 or 64 bit platforms. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>skip_length <font color='#5555FF'><</font> save_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_size_t<font face='Lucida Console'>)</font>skip_length; |
|
|
|
<font color='#0000FF'>else</font> |
|
skip_length <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_uint_32<font face='Lucida Console'>)</font>save_size; |
|
|
|
<font color='#BB00BB'>png_calculate_crc</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>-</font><font color='#5555FF'>=</font> skip_length; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size; |
|
png_uint_32 skip_length <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length; |
|
|
|
<font color='#009900'>/* We want the smaller of 'skip_length' and 'current_buffer_size', here, |
|
* the same problem exists as above and the same solution. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>skip_length <font color='#5555FF'><</font> save_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_size_t<font face='Lucida Console'>)</font>skip_length; |
|
|
|
<font color='#0000FF'>else</font> |
|
skip_length <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_uint_32<font face='Lucida Console'>)</font>save_size; |
|
|
|
<font color='#BB00BB'>png_calculate_crc</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length <font color='#5555FF'>-</font><font color='#5555FF'>=</font> skip_length; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>skip_length<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'><</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_crc_finish</font><font face='Lucida Console'>(</font>png_ptr, <font color='#979000'>0</font><font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_CHUNK_MODE; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> PNGCBAPI |
|
<b><a name='png_push_fill_buffer'></a>png_push_fill_buffer</b><font face='Lucida Console'>(</font>png_structp png_ptr, png_bytep buffer, png_size_t length<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_bytep ptr; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
|
<font color='#0000FF'>return</font>; |
|
|
|
ptr <font color='#5555FF'>=</font> buffer; |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>length <font color='#5555FF'><</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> length; |
|
|
|
<font color='#0000FF'>else</font> |
|
save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
|
|
|
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
length <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>length <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>length <font color='#5555FF'><</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> length; |
|
|
|
<font color='#0000FF'>else</font> |
|
save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size; |
|
|
|
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_save_buffer'></a>png_push_save_buffer</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr <font color='#5555FF'>!</font><font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t i, istop; |
|
png_bytep sp; |
|
png_bytep dp; |
|
|
|
istop <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>, sp <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr, dp <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer; |
|
i <font color='#5555FF'><</font> istop; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font>, sp<font color='#5555FF'>+</font><font color='#5555FF'>+</font>, dp<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#5555FF'>*</font>dp <font color='#5555FF'>=</font> <font color='#5555FF'>*</font>sp; |
|
<b>}</b> |
|
<b>}</b> |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>+</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>></font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_max<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t new_max; |
|
png_bytep old_buffer; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>></font> PNG_SIZE_MAX <font color='#5555FF'>-</font> |
|
<font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>+</font> <font color='#979000'>256</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Potential overflow of save_buffer</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
new_max <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>+</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>+</font> <font color='#979000'>256</font>; |
|
old_buffer <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_bytep<font face='Lucida Console'>)</font><font color='#BB00BB'>png_malloc_warn</font><font face='Lucida Console'>(</font>png_ptr, |
|
<font face='Lucida Console'>(</font>png_size_t<font face='Lucida Console'>)</font>new_max<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_free</font><font face='Lucida Console'>(</font>png_ptr, old_buffer<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Insufficient memory for save_buffer</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer, old_buffer, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_free</font><font face='Lucida Console'>(</font>png_ptr, old_buffer<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_max <font color='#5555FF'>=</font> new_max; |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer <font color='#5555FF'>+</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size, |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>+</font><font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
<b>}</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_restore_buffer'></a>png_push_restore_buffer</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_bytep buffer, |
|
png_size_t buffer_length<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer <font color='#5555FF'>=</font> buffer; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>=</font> buffer_length; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>=</font> buffer_length <font color='#5555FF'>+</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_read_IDAT'></a>png_push_read_IDAT</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font> PNG_HAVE_CHUNK_HEADER<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_byte chunk_length[<font color='#979000'>4</font>]; |
|
png_byte chunk_tag[<font color='#979000'>4</font>]; |
|
|
|
<font color='#009900'>/* TODO: this code can be commoned up with the same code in push_read */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'><</font> <font color='#979000'>8</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_push_fill_buffer</font><font face='Lucida Console'>(</font>png_ptr, chunk_length, <font color='#979000'>4</font><font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length <font color='#5555FF'>=</font> <font color='#BB00BB'>png_get_uint_31</font><font face='Lucida Console'>(</font>png_ptr, chunk_length<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_reset_crc</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_crc_read</font><font face='Lucida Console'>(</font>png_ptr, chunk_tag, <font color='#979000'>4</font><font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>=</font> <font color='#BB00BB'>PNG_CHUNK_FROM_STRING</font><font face='Lucida Console'>(</font>chunk_tag<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_HAVE_CHUNK_HEADER; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>chunk_name <font color='#5555FF'>!</font><font color='#5555FF'>=</font> png_IDAT<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>process_mode <font color='#5555FF'>=</font> PNG_READ_CHUNK_MODE; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>flags <font color='#5555FF'>&</font> PNG_FLAG_ZSTREAM_ENDED<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Not enough compressed data</font>"<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>push_length; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size; |
|
png_uint_32 idat_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size; |
|
|
|
<font color='#009900'>/* We want the smaller of 'idat_size' and 'current_buffer_size', but they |
|
* are of different types and we don't know which variable has the fewest |
|
* bits. Carefully select the smaller and cast it to the type of the |
|
* larger - this cannot overflow. Do not cast in the following test - it |
|
* will break on either 16 or 64 bit platforms. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>idat_size <font color='#5555FF'><</font> save_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_size_t<font face='Lucida Console'>)</font>idat_size; |
|
|
|
<font color='#0000FF'>else</font> |
|
idat_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_uint_32<font face='Lucida Console'>)</font>save_size; |
|
|
|
<font color='#BB00BB'>png_calculate_crc</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#BB00BB'>png_process_IDAT_data</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> idat_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>save_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_size_t save_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size; |
|
png_uint_32 idat_size <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size; |
|
|
|
<font color='#009900'>/* We want the smaller of 'idat_size' and 'current_buffer_size', but they |
|
* are of different types and we don't know which variable has the fewest |
|
* bits. Carefully select the smaller and cast it to the type of the |
|
* larger - this cannot overflow. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>idat_size <font color='#5555FF'><</font> save_size<font face='Lucida Console'>)</font> |
|
save_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_size_t<font face='Lucida Console'>)</font>idat_size; |
|
|
|
<font color='#0000FF'>else</font> |
|
idat_size <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_uint_32<font face='Lucida Console'>)</font>save_size; |
|
|
|
<font color='#BB00BB'>png_calculate_crc</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#BB00BB'>png_process_IDAT_data</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr, save_size<font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> idat_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_size <font color='#5555FF'>-</font><font color='#5555FF'>=</font> save_size; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>current_buffer_ptr <font color='#5555FF'>+</font><font color='#5555FF'>=</font> save_size; |
|
<b>}</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>idat_size<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>buffer_size <font color='#5555FF'><</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_save_buffer</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#BB00BB'>png_crc_finish</font><font face='Lucida Console'>(</font>png_ptr, <font color='#979000'>0</font><font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>&</font><font color='#5555FF'>=</font> ~PNG_HAVE_CHUNK_HEADER; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>mode <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_AFTER_IDAT; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zowner <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_process_IDAT_data'></a>png_process_IDAT_data</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_bytep buffer, |
|
png_size_t buffer_length<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* The caller checks for a non-zero buffer length. */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>buffer_length <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> buffer <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>No IDAT data (internal error)</font>"<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#009900'>/* This routine must process all the data it has been given |
|
* before returning, calling the row callback as required to |
|
* handle the uncompressed results. |
|
*/</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.next_in <font color='#5555FF'>=</font> buffer; |
|
<font color='#009900'>/* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_in <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>uInt<font face='Lucida Console'>)</font>buffer_length; |
|
|
|
<font color='#009900'>/* Keep going until the decompressed data is all processed |
|
* or the stream marked as finished. |
|
*/</font> |
|
<font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_in <font color='#5555FF'>></font> <font color='#979000'>0</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> |
|
<font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>flags <font color='#5555FF'>&</font> PNG_FLAG_ZSTREAM_ENDED<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> ret; |
|
|
|
<font color='#009900'>/* We have data for zlib, but we must check that zlib |
|
* has someplace to put the results. It doesn't matter |
|
* if we don't expect any results -- it may be the input |
|
* data is just the LZ end code. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font color='#5555FF'>!</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_out <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* TODO: WARNING: TRUNCATION ERROR: DANGER WILL ROBINSON: */</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_out <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>uInt<font face='Lucida Console'>)</font><font face='Lucida Console'>(</font><font color='#BB00BB'>PNG_ROWBYTES</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pixel_depth, |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>iwidth<font face='Lucida Console'>)</font> <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.next_out <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* Using Z_SYNC_FLUSH here means that an unterminated |
|
* LZ stream (a stream with a missing end code) can still |
|
* be handled, otherwise (Z_NO_FLUSH) a future zlib |
|
* implementation might defer output and therefore |
|
* change the current behavior (see comments in inflate.c |
|
* for why this doesn't happen at present with zlib 1.2.5). |
|
*/</font> |
|
ret <font color='#5555FF'>=</font> <font color='#BB00BB'>inflate</font><font face='Lucida Console'>(</font><font color='#5555FF'>&</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream, Z_SYNC_FLUSH<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#009900'>/* Check for any failure before proceeding. */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_OK <font color='#5555FF'>&</font><font color='#5555FF'>&</font> ret <font color='#5555FF'>!</font><font color='#5555FF'>=</font> Z_STREAM_END<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* Terminate the decompression. */</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>flags <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_FLAG_ZSTREAM_ENDED; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zowner <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
|
|
<font color='#009900'>/* This may be a truncated stream (missing or |
|
* damaged end code). Treat that as a warning. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number <font color='#5555FF'>></font><font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_rows <font color='#5555FF'>|</font><font color='#5555FF'>|</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>></font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_warning</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Truncated compressed data in IDAT</font>"<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>else</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Decompression error in IDAT</font>"<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#009900'>/* Skip the check on unprocessed input */</font> |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* Did inflate output any data? */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.next_out <font color='#5555FF'>!</font><font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* Is this unexpected data after the last row? |
|
* If it is, artificially terminate the LZ output |
|
* here. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number <font color='#5555FF'>></font><font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_rows <font color='#5555FF'>|</font><font color='#5555FF'>|</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>></font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* Extra data. */</font> |
|
<font color='#BB00BB'>png_warning</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Extra compressed data in IDAT</font>"<font face='Lucida Console'>)</font>; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>flags <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_FLAG_ZSTREAM_ENDED; |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zowner <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
|
|
<font color='#009900'>/* Do no more processing; skip the unprocessed |
|
* input check below. |
|
*/</font> |
|
<font color='#0000FF'>return</font>; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* Do we have a complete row? */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_out <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_push_process_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* And check for the end of the stream. */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>ret <font color='#5555FF'>=</font><font color='#5555FF'>=</font> Z_STREAM_END<font face='Lucida Console'>)</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>flags <font color='#5555FF'>|</font><font color='#5555FF'>=</font> PNG_FLAG_ZSTREAM_ENDED; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* All the data should have been processed, if anything |
|
* is left at this point we have bytes of IDAT data |
|
* after the zlib end code. |
|
*/</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>zstream.avail_in <font color='#5555FF'>></font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_warning</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>Extra compression data in IDAT</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_process_row'></a>png_push_process_row</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#009900'>/* 1.5.6: row_info moved out of png_struct to a local here. */</font> |
|
png_row_info row_info; |
|
|
|
row_info.width <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>iwidth; <font color='#009900'>/* NOTE: width of current interlaced row */</font> |
|
row_info.color_type <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>color_type; |
|
row_info.bit_depth <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>bit_depth; |
|
row_info.channels <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>channels; |
|
row_info.pixel_depth <font color='#5555FF'>=</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pixel_depth; |
|
row_info.rowbytes <font color='#5555FF'>=</font> <font color='#BB00BB'>PNG_ROWBYTES</font><font face='Lucida Console'>(</font>row_info.pixel_depth, row_info.width<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf[<font color='#979000'>0</font>] <font color='#5555FF'>></font> PNG_FILTER_VALUE_NONE<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf[<font color='#979000'>0</font>] <font color='#5555FF'><</font> PNG_FILTER_VALUE_LAST<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_read_filter_row</font><font face='Lucida Console'>(</font>png_ptr, <font color='#5555FF'>&</font>row_info, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font>, |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>prev_row <font color='#5555FF'>+</font> <font color='#979000'>1</font>, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf[<font color='#979000'>0</font>]<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>else</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>bad adaptive filter value</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#009900'>/* libpng 1.5.6: the following line was copying png_ptr->rowbytes before |
|
* 1.5.6, while the buffer really is this big in current versions of libpng |
|
* it may not be in the future, so this was changed just to copy the |
|
* interlaced row count: |
|
*/</font> |
|
<font color='#BB00BB'>memcpy</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>prev_row, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf, row_info.rowbytes <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_READ_TRANSFORMS_SUPPORTED |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformations<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_do_read_transformations</font><font face='Lucida Console'>(</font>png_ptr, <font color='#5555FF'>&</font>row_info<font face='Lucida Console'>)</font>; |
|
<font color='#0000FF'>#endif</font> |
|
|
|
<font color='#009900'>/* The transformed pixel depth should match the depth now in row_info. */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformed_pixel_depth <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformed_pixel_depth <font color='#5555FF'>=</font> row_info.pixel_depth; |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>row_info.pixel_depth <font color='#5555FF'>></font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>maximum_pixel_depth<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>progressive row overflow</font>"<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>else</font> <font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformed_pixel_depth <font color='#5555FF'>!</font><font color='#5555FF'>=</font> row_info.pixel_depth<font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_error</font><font face='Lucida Console'>(</font>png_ptr, "<font color='#CC0000'>internal progressive row size calculation error</font>"<font face='Lucida Console'>)</font>; |
|
|
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_READ_INTERLACING_SUPPORTED |
|
<font color='#009900'>/* Blow up interlaced rows to full size */</font> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>interlaced <font color='#5555FF'>&</font><font color='#5555FF'>&</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformations <font color='#5555FF'>&</font> PNG_INTERLACE<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'><</font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> |
|
<font color='#BB00BB'>png_do_read_interlace</font><font face='Lucida Console'>(</font><font color='#5555FF'>&</font>row_info, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font>, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass, |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformations<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>switch</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>case</font> <font color='#979000'>0</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>8</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; <font color='#009900'>/* Updates png_ptr->pass */</font> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Pass 1 might be empty */</font> |
|
<b>{</b> |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height <font color='#5555FF'><</font><font color='#5555FF'>=</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>6</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height <font color='#5555FF'><</font><font color='#5555FF'>=</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>case</font> <font color='#979000'>1</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>8</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>1</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Skip top 4 generated rows */</font> |
|
<b>{</b> |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>case</font> <font color='#979000'>2</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>2</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Pass 3 might be empty */</font> |
|
<b>{</b> |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>case</font> <font color='#979000'>3</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>4</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>3</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Skip top two generated rows */</font> |
|
<b>{</b> |
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>case</font> <font color='#979000'>4</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>4</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Pass 5 might be empty */</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>case</font> <font color='#979000'>5</font>: |
|
<b>{</b> |
|
<font color='#0000FF'><u>int</u></font> i; |
|
|
|
<font color='#0000FF'>for</font> <font face='Lucida Console'>(</font>i <font color='#5555FF'>=</font> <font color='#979000'>0</font>; i <font color='#5555FF'><</font> <font color='#979000'>2</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>5</font>; i<font color='#5555FF'>+</font><font color='#5555FF'>+</font><font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> <font color='#009900'>/* Skip top generated row */</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>break</font>; |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>default</font>: |
|
<font color='#0000FF'>case</font> <font color='#979000'>6</font>: |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>!</font><font color='#5555FF'>=</font> <font color='#979000'>6</font><font face='Lucida Console'>)</font> |
|
<font color='#0000FF'>break</font>; |
|
|
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, NULL<font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
<b>}</b> |
|
<font color='#0000FF'>else</font> |
|
<font color='#0000FF'>#endif</font> |
|
<b>{</b> |
|
<font color='#BB00BB'>png_push_have_row</font><font face='Lucida Console'>(</font>png_ptr, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_buf <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
<font color='#BB00BB'>png_read_push_finish_row</font><font face='Lucida Console'>(</font>png_ptr<font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_read_push_finish_row'></a>png_read_push_finish_row</b><font face='Lucida Console'>(</font>png_structrp png_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>#ifdef</font> PNG_READ_INTERLACING_SUPPORTED |
|
<font color='#009900'>/* Arrays to facilitate easy interlacing - use pass (0 - 6) as index */</font> |
|
|
|
<font color='#009900'>/* Start of interlace block */</font> |
|
<font color='#0000FF'>static</font> PNG_CONST png_byte png_pass_start[] <font color='#5555FF'>=</font> <b>{</b><font color='#979000'>0</font>, <font color='#979000'>4</font>, <font color='#979000'>0</font>, <font color='#979000'>2</font>, <font color='#979000'>0</font>, <font color='#979000'>1</font>, <font color='#979000'>0</font><b>}</b>; |
|
|
|
<font color='#009900'>/* Offset to next interlace block */</font> |
|
<font color='#0000FF'>static</font> PNG_CONST png_byte png_pass_inc[] <font color='#5555FF'>=</font> <b>{</b><font color='#979000'>8</font>, <font color='#979000'>8</font>, <font color='#979000'>4</font>, <font color='#979000'>4</font>, <font color='#979000'>2</font>, <font color='#979000'>2</font>, <font color='#979000'>1</font><b>}</b>; |
|
|
|
<font color='#009900'>/* Start of interlace block in the y direction */</font> |
|
<font color='#0000FF'>static</font> PNG_CONST png_byte png_pass_ystart[] <font color='#5555FF'>=</font> <b>{</b><font color='#979000'>0</font>, <font color='#979000'>0</font>, <font color='#979000'>4</font>, <font color='#979000'>0</font>, <font color='#979000'>2</font>, <font color='#979000'>0</font>, <font color='#979000'>1</font><b>}</b>; |
|
|
|
<font color='#009900'>/* Offset to next interlace block in the y direction */</font> |
|
<font color='#0000FF'>static</font> PNG_CONST png_byte png_pass_yinc[] <font color='#5555FF'>=</font> <b>{</b><font color='#979000'>8</font>, <font color='#979000'>8</font>, <font color='#979000'>8</font>, <font color='#979000'>4</font>, <font color='#979000'>4</font>, <font color='#979000'>2</font>, <font color='#979000'>2</font><b>}</b>; |
|
|
|
<font color='#009900'>/* Height of interlace block. This is not currently used - if you need |
|
* it, uncomment it here and in png.h |
|
static PNG_CONST png_byte png_pass_height[] = {8, 8, 4, 4, 2, 2, 1}; |
|
*/</font> |
|
<font color='#0000FF'>#endif</font> |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number<font color='#5555FF'>+</font><font color='#5555FF'>+</font>; |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number <font color='#5555FF'><</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_rows<font face='Lucida Console'>)</font> |
|
<font color='#0000FF'>return</font>; |
|
|
|
<font color='#0000FF'>#ifdef</font> PNG_READ_INTERLACING_SUPPORTED |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>interlaced<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number <font color='#5555FF'>=</font> <font color='#979000'>0</font>; |
|
<font color='#BB00BB'>memset</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>prev_row, <font color='#979000'>0</font>, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>rowbytes <font color='#5555FF'>+</font> <font color='#979000'>1</font><font face='Lucida Console'>)</font>; |
|
|
|
<font color='#0000FF'>do</font> |
|
<b>{</b> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass<font color='#5555FF'>+</font><font color='#5555FF'>+</font>; |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>1</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width <font color='#5555FF'><</font> <font color='#979000'>5</font><font face='Lucida Console'>)</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> |
|
<font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>3</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width <font color='#5555FF'><</font> <font color='#979000'>3</font><font face='Lucida Console'>)</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> |
|
<font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>5</font> <font color='#5555FF'>&</font><font color='#5555FF'>&</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width <font color='#5555FF'><</font> <font color='#979000'>2</font><font face='Lucida Console'>)</font><font face='Lucida Console'>)</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass<font color='#5555FF'>+</font><font color='#5555FF'>+</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>></font> <font color='#979000'>7</font><font face='Lucida Console'>)</font> |
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass<font color='#5555FF'>-</font><font color='#5555FF'>-</font>; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass <font color='#5555FF'>></font><font color='#5555FF'>=</font> <font color='#979000'>7</font><font face='Lucida Console'>)</font> |
|
<font color='#0000FF'>break</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>iwidth <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>width <font color='#5555FF'>+</font> |
|
png_pass_inc[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass] <font color='#5555FF'>-</font> <font color='#979000'>1</font> <font color='#5555FF'>-</font> |
|
png_pass_start[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass]<font face='Lucida Console'>)</font> <font color='#5555FF'>/</font> |
|
png_pass_inc[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass]; |
|
|
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>transformations <font color='#5555FF'>&</font> PNG_INTERLACE<font face='Lucida Console'>)</font> |
|
<font color='#0000FF'>break</font>; |
|
|
|
png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_rows <font color='#5555FF'>=</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>height <font color='#5555FF'>+</font> |
|
png_pass_yinc[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass] <font color='#5555FF'>-</font> <font color='#979000'>1</font> <font color='#5555FF'>-</font> |
|
png_pass_ystart[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass]<font face='Lucida Console'>)</font> <font color='#5555FF'>/</font> |
|
png_pass_yinc[png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass]; |
|
|
|
<b>}</b> <font color='#0000FF'>while</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>iwidth <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font> <font color='#5555FF'>|</font><font color='#5555FF'>|</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>num_rows <font color='#5555FF'>=</font><font color='#5555FF'>=</font> <font color='#979000'>0</font><font face='Lucida Console'>)</font>; |
|
<b>}</b> |
|
<font color='#0000FF'>#endif</font> <font color='#009900'>/* PNG_READ_INTERLACING_SUPPORTED */</font> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
|
<b><a name='png_push_have_info'></a>png_push_have_info</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr<font face='Lucida Console'>)</font> |
|
<b>{</b> |
|
<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>info_fn <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>info_fn<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
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<b><a name='png_push_have_end'></a>png_push_have_end</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_inforp info_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>end_fn <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>end_fn<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>(</font>png_ptr, info_ptr<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<font color='#0000FF'><u>void</u></font> <font color='#009900'>/* PRIVATE */</font> |
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<b><a name='png_push_have_row'></a>png_push_have_row</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_bytep row<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_fn <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font face='Lucida Console'>(</font><font color='#5555FF'>*</font><font face='Lucida Console'>(</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_fn<font face='Lucida Console'>)</font><font face='Lucida Console'>)</font><font face='Lucida Console'>(</font>png_ptr, row, png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_number, |
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<font face='Lucida Console'>(</font><font color='#0000FF'><u>int</u></font><font face='Lucida Console'>)</font>png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>pass<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<font color='#0000FF'>#ifdef</font> PNG_READ_INTERLACING_SUPPORTED |
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<font color='#0000FF'><u>void</u></font> PNGAPI |
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<b><a name='png_progressive_combine_row'></a>png_progressive_combine_row</b><font face='Lucida Console'>(</font>png_const_structrp png_ptr, png_bytep old_row, |
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png_const_bytep new_row<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font>; |
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|
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<font color='#009900'>/* new_row is a flag here - if it is NULL then the app callback was called |
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* from an empty row (see the calls to png_struct::row_fn below), otherwise |
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* it must be png_ptr->row_buf+1 |
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*/</font> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>new_row <font color='#5555FF'>!</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#BB00BB'>png_combine_row</font><font face='Lucida Console'>(</font>png_ptr, old_row, <font color='#979000'>1</font><font color='#009900'>/*display*/</font><font face='Lucida Console'>)</font>; |
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<b>}</b> |
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<font color='#0000FF'>#endif</font> <font color='#009900'>/* PNG_READ_INTERLACING_SUPPORTED */</font> |
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<font color='#0000FF'><u>void</u></font> PNGAPI |
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<b><a name='png_set_progressive_read_fn'></a>png_set_progressive_read_fn</b><font face='Lucida Console'>(</font>png_structrp png_ptr, png_voidp progressive_ptr, |
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png_progressive_info_ptr info_fn, png_progressive_row_ptr row_fn, |
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png_progressive_end_ptr end_fn<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font>; |
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|
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>info_fn <font color='#5555FF'>=</font> info_fn; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>row_fn <font color='#5555FF'>=</font> row_fn; |
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png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>end_fn <font color='#5555FF'>=</font> end_fn; |
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|
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<font color='#BB00BB'>png_set_read_fn</font><font face='Lucida Console'>(</font>png_ptr, progressive_ptr, png_push_fill_buffer<font face='Lucida Console'>)</font>; |
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<b>}</b> |
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|
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png_voidp PNGAPI |
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<b><a name='png_get_progressive_ptr'></a>png_get_progressive_ptr</b><font face='Lucida Console'>(</font>png_const_structrp png_ptr<font face='Lucida Console'>)</font> |
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<b>{</b> |
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<font color='#0000FF'>if</font> <font face='Lucida Console'>(</font>png_ptr <font color='#5555FF'>=</font><font color='#5555FF'>=</font> NULL<font face='Lucida Console'>)</font> |
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<font color='#0000FF'>return</font> <font face='Lucida Console'>(</font>NULL<font face='Lucida Console'>)</font>; |
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|
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<font color='#0000FF'>return</font> png_ptr<font color='#5555FF'>-</font><font color='#5555FF'>></font>io_ptr; |
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<b>}</b> |
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<font color='#0000FF'>#endif</font> <font color='#009900'>/* PNG_PROGRESSIVE_READ_SUPPORTED */</font> |
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</pre></body></html> |
