|
<html><head><title>dlib C++ Library - canvas_drawing_abstract.h</title></head><body bgcolor='white'><pre> |
|
<font color='#009900'>// Copyright (C) 2005 Davis E. King ([email protected]), and Nils Labugt |
|
</font><font color='#009900'>// License: Boost Software License See LICENSE.txt for the full license. |
|
</font><font color='#0000FF'>#undef</font> DLIB_GUI_CANVAS_DRAWINg_ABSTRACT_ |
|
<font color='#0000FF'>#ifdef</font> DLIB_GUI_CANVAS_DRAWINg_ABSTRACT_ |
|
|
|
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='../gui_core.h.html'>../gui_core.h</a>" |
|
<font color='#0000FF'>#include</font> "<a style='text-decoration:none' href='../pixel.h.html'>../pixel.h</a>" |
|
|
|
<font color='#0000FF'>namespace</font> dlib |
|
<b>{</b> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_line'></a>draw_line</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> p1, |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> p2, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel <font color='#5555FF'>=</font> <font color='#BB00BB'>rgb_pixel</font><font face='Lucida Console'>(</font><font color='#979000'>0</font>,<font color='#979000'>0</font>,<font color='#979000'>0</font><font face='Lucida Console'>)</font>, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- draws the part of the line from p1 to p1 that overlaps with |
|
the canvas and area onto the canvas. |
|
- Uses the given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_rectangle'></a>draw_rectangle</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
rectangle rect, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel <font color='#5555FF'>=</font> <font color='#BB00BB'>rgb_pixel</font><font face='Lucida Console'>(</font><font color='#979000'>0</font>,<font color='#979000'>0</font>,<font color='#979000'>0</font><font face='Lucida Console'>)</font>, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- Draws the part of the rectangle that overlaps with |
|
the canvas and area onto the canvas. |
|
- Uses the given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_circle'></a>draw_circle</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> center_point, |
|
<font color='#0000FF'><u>double</u></font> radius, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel <font color='#5555FF'>=</font> <font color='#BB00BB'>rgb_pixel</font><font face='Lucida Console'>(</font><font color='#979000'>0</font>,<font color='#979000'>0</font>,<font color='#979000'>0</font><font face='Lucida Console'>)</font>, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- draws the part of the circle centered at center_point with the given radius |
|
that overlaps with the canvas and area onto the canvas. |
|
- Uses the given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_pixel'></a>draw_pixel</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> p, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- if (c.contains(p)) then |
|
- sets the pixel in c that represents the point p to the |
|
given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_solid_circle'></a>draw_solid_circle</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> center_point, |
|
<font color='#0000FF'><u>double</u></font> radius, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel <font color='#5555FF'>=</font> <font color='#BB00BB'>rgb_pixel</font><font face='Lucida Console'>(</font><font color='#979000'>0</font>,<font color='#979000'>0</font>,<font color='#979000'>0</font><font face='Lucida Console'>)</font>, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- draws the part of the solid circle centered at center_point with the given |
|
radius that overlaps with the canvas and area onto the canvas. |
|
("solid" means that the interior is also filled in with the given |
|
pixel color) |
|
- Uses the given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_solid_convex_polygon'></a>draw_solid_convex_polygon</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> std::vector<font color='#5555FF'><</font>point<font color='#5555FF'>></font><font color='#5555FF'>&</font> polygon, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel <font color='#5555FF'>=</font> <font color='#BB00BB'>rgb_pixel</font><font face='Lucida Console'>(</font><font color='#979000'>0</font>,<font color='#979000'>0</font>,<font color='#979000'>0</font><font face='Lucida Console'>)</font>, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- Interprets the given std::vector polygon object as defining a convex polygon |
|
shape. In particular, the polygon is given by taking the points and drawing |
|
lines between them. That is, imagine drawing a line connecting polygon[i] |
|
and polygon[(i+1)%polygon.size()], for all valid i, and then filling in the |
|
interior of the polygon. That is what this function does. |
|
- When drawing the polygon, only the part of the polygon which overlaps both |
|
the given canvas and area rectangle is drawn. |
|
- Uses the given pixel color to draw the polygon. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_button_down'></a>draw_button_down</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> btn, |
|
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> alpha <font color='#5555FF'>=</font> <font color='#979000'>255</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- 0 <= alpha <= 255 |
|
ensures |
|
- draws the border of a button onto canvas c: |
|
- the border will be that of a button that is depressed |
|
- only the part of the border that overlaps with the canvas object |
|
will be drawn. |
|
- the border will be for the button whose area is defined by the |
|
rectangle btn. |
|
- performs alpha blending such that the button is drawn with full opacity |
|
when alpha is 255 and fully transparent when alpha is 0. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_sunken_rectangle'></a>draw_sunken_rectangle</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> border, |
|
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> alpha <font color='#5555FF'>=</font> <font color='#979000'>255</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- 0 <= alpha <= 255 |
|
ensures |
|
- draws a sunken rectangle around the given border. |
|
(This is the type of border used for text_fields and |
|
check_boxes and the like). |
|
- performs alpha blending such that the rectangle is drawn with full opacity |
|
when alpha is 255 and fully transparent when alpha is 0. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_button_up'></a>draw_button_up</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> btn, |
|
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>char</u></font> alpha <font color='#5555FF'>=</font> <font color='#979000'>255</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- 0 <= alpha <= 255 |
|
ensures |
|
- draws the border of a button onto canvas c: |
|
- the border will be that of a button that is NOT depressed |
|
- only the part of the border that overlaps with the canvas object |
|
will be drawn. |
|
- the border will be for the button whose area is defined by the |
|
rectangle btn. |
|
- performs alpha blending such that the button is drawn with full opacity |
|
when alpha is 255 and fully transparent when alpha is 0. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_checkered'></a>draw_checkered</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel1, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel2 |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- fills the area on the given canvas defined by the rectangle area with a checkers |
|
board pattern where every other pixel gets assigned either pixel1 or pixel2. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> image_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_image'></a>draw_image</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c |
|
<font color='#0000FF'>const</font> point<font color='#5555FF'>&</font> p, |
|
<font color='#0000FF'>const</font> image_type<font color='#5555FF'>&</font> image, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- image_type == an implementation of array2d/array2d_kernel_abstract.h |
|
- pixel_traits<typename image_type::type> is defined |
|
ensures |
|
- draws the given image object onto the canvas such that the upper left corner of the |
|
image will appear at the point p in the canvas's window. (note that the |
|
upper left corner of the image is assumed to be the pixel image[0][0] and the |
|
lower right corner of the image is assumed to be image[image.nr()-1][image.nc()-1]) |
|
- only draws the part of the image that overlaps with the area rectangle |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> image_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_image'></a>draw_image</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> rect, |
|
<font color='#0000FF'>const</font> image_type<font color='#5555FF'>&</font> img, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- image_type == an implementation of array2d/array2d_kernel_abstract.h |
|
- pixel_traits<typename image_type::type> is defined |
|
ensures |
|
- draws the given image object onto the canvas such that the upper left corner |
|
of the image will appear at the point rect.tl_corner() in the canvas's window |
|
and the lower right corner of the image will appear at rect.br_corner() in |
|
the canvas's window. (note that the upper left corner of the image is |
|
assumed to be the pixel image[0][0] and the lower right corner of the image |
|
is assumed to be image[image.nr()-1][image.nc()-1]) |
|
- only draws the part of the image that overlaps with the area rectangle |
|
- Uses nearest neighbor interpolation when the given rect isn't the same size |
|
as the input image. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='fill_rect'></a>fill_rect</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> rect, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- fills the area defined by rect in the given canvas with the given pixel color. |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='fill_rect_with_vertical_gradient'></a>fill_rect_with_vertical_gradient</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> rect, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel_top, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> pixel_bottom, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- fills the rectangle defined by rect in the given canvas with the given colors. |
|
The top of the area will have the pixel_top color and will slowly fade |
|
towards the pixel_bottom color towards the bottom of rect. |
|
- only draws the part of the image that overlaps with the area rectangle |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='fill_gradient_rounded'></a>fill_gradient_rounded</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> rect, |
|
<font color='#0000FF'><u>unsigned</u></font> <font color='#0000FF'><u>long</u></font> radius, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> top_color, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> bottom_color, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- Fills the region defined by rect in the given canvas with the given colors. |
|
The top of the region will have the top_color color and will slowly fade |
|
towards the bottom_color color towards the bottom of rect. |
|
- The drawn rectangle will have rounded corners and with the amount of |
|
- rounding given by the radius argument. |
|
- only the part of this object that overlaps with area and the canvas |
|
will be drawn on the canvas |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<font color='#0000FF'>template</font> <font color='#5555FF'><</font> |
|
<font color='#0000FF'>typename</font> pixel_type |
|
<font color='#5555FF'>></font> |
|
<font color='#0000FF'><u>void</u></font> <b><a name='draw_rounded_rectangle'></a>draw_rounded_rectangle</b> <font face='Lucida Console'>(</font> |
|
<font color='#0000FF'>const</font> canvas<font color='#5555FF'>&</font> c, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> rect, |
|
<font color='#0000FF'><u>unsigned</u></font> radius, |
|
<font color='#0000FF'>const</font> pixel_type<font color='#5555FF'>&</font> color, |
|
<font color='#0000FF'>const</font> rectangle<font color='#5555FF'>&</font> area <font color='#5555FF'>=</font> <font color='#BB00BB'>rectangle</font><font face='Lucida Console'>(</font><font color='#5555FF'>-</font>infinity,<font color='#5555FF'>-</font>infinity,infinity,infinity<font face='Lucida Console'>)</font> |
|
<font face='Lucida Console'>)</font>; |
|
<font color='#009900'>/*! |
|
requires |
|
- pixel_traits<pixel_type> is defined |
|
ensures |
|
- Draws the part of the rectangle that overlaps with |
|
the canvas onto the canvas. |
|
- The drawn rectangle will have rounded corners and with the amount of |
|
rounding given by the radius argument. |
|
- Uses the given pixel color. |
|
- only draws the part of the image that overlaps with the area rectangle |
|
!*/</font> |
|
|
|
<font color='#009900'>// ---------------------------------------------------------------------------------------- |
|
</font> |
|
<b>}</b> |
|
|
|
<font color='#0000FF'>#endif</font> <font color='#009900'>// DLIB_GUI_CANVAS_DRAWINg_ABSTRACT_ |
|
</font> |
|
|
|
</pre></body></html> |
