Spaces:
Runtime error
Runtime error
File size: 8,939 Bytes
d82cf6a |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 |
from ctypes import *
from pyglet.gl import *
from pyglet.image import *
from pyglet.image.codecs import *
from pyglet.image.codecs import gif
import pyglet.lib
import pyglet.window
gdk = pyglet.lib.load_library('gdk-x11-2.0')
gdkpixbuf = pyglet.lib.load_library('gdk_pixbuf-2.0')
GdkPixbufLoader = c_void_p
GdkPixbuf = c_void_p
guchar = c_char
gdkpixbuf.gdk_pixbuf_loader_new.restype = POINTER(GdkPixbufLoader)
gdkpixbuf.gdk_pixbuf_loader_get_pixbuf.restype = POINTER(GdkPixbuf)
gdkpixbuf.gdk_pixbuf_get_pixels.restype = POINTER(guchar)
gdkpixbuf.gdk_pixbuf_loader_get_animation.restype = POINTER(c_void_p)
gdkpixbuf.gdk_pixbuf_animation_get_iter.restype = POINTER(c_void_p)
gdkpixbuf.gdk_pixbuf_animation_iter_get_pixbuf.restype = POINTER(GdkPixbuf)
class GTimeVal(Structure):
_fields_ = [
('tv_sec', c_long),
('tv_usec', c_long)
]
GQuark = c_uint32
gint = c_int
gchar = c_char
class GError(Structure):
_fields_ = [
('domain', GQuark),
('code', gint),
('message', POINTER(gchar))
]
gerror_ptr = POINTER(GError)
def _gerror_to_string(error):
"""
Convert a GError to a string.
`error` should be a valid pointer to a GError struct.
"""
return 'GdkPixBuf Error: domain[{}], code[{}]: {}'.format(error.contents.domain,
error.contents.code,
error.contents.message)
class GdkPixBufLoader:
"""
Wrapper around GdkPixBufLoader object.
"""
def __init__(self, filename, file):
self.closed = False
self._file = file
self._filename = filename
self._loader = gdkpixbuf.gdk_pixbuf_loader_new()
if self._loader is None:
raise ImageDecodeException('Unable to instantiate gdk pixbuf loader')
self._load_file()
def __del__(self):
if self._loader is not None:
if not self.closed:
self._cancel_load()
gdk.g_object_unref(self._loader)
def _load_file(self):
self._file.seek(0)
data = self._file.read()
self.write(data)
def _finish_load(self):
assert not self.closed
error = gerror_ptr()
all_data_passed = gdkpixbuf.gdk_pixbuf_loader_close(self._loader, byref(error))
self.closed = True
if not all_data_passed:
raise ImageDecodeException(_gerror_to_string(error))
def _cancel_load(self):
assert not self.closed
gdkpixbuf.gdk_pixbuf_loader_close(self._loader, None)
self.closed = True
def write(self, data):
assert not self.closed, 'Cannot write after closing loader'
error = gerror_ptr()
if not gdkpixbuf.gdk_pixbuf_loader_write(self._loader, data, len(data), byref(error)):
raise ImageDecodeException(_gerror_to_string(error))
def get_pixbuf(self):
self._finish_load()
pixbuf = gdkpixbuf.gdk_pixbuf_loader_get_pixbuf(self._loader)
if pixbuf is None:
raise ImageDecodeException('Failed to get pixbuf from loader')
return GdkPixBuf(self, pixbuf)
def get_animation(self):
self._finish_load()
anim = gdkpixbuf.gdk_pixbuf_loader_get_animation(self._loader)
if anim is None:
raise ImageDecodeException('Failed to get animation from loader')
gif_delays = self._get_gif_delays()
return GdkPixBufAnimation(self, anim, gif_delays)
def _get_gif_delays(self):
# GDK pixbuf animations will loop indefinitely if looping is enabled for the
# gif, so get number of frames and delays from gif metadata
assert self._file is not None
self._file.seek(0)
gif_stream = gif.read(self._file)
return [image.delay for image in gif_stream.images]
class GdkPixBuf:
"""
Wrapper around GdkPixBuf object.
"""
def __init__(self, loader, pixbuf):
# Keep reference to loader alive
self._loader = loader
self._pixbuf = pixbuf
gdk.g_object_ref(pixbuf)
def __del__(self):
if self._pixbuf is not None:
gdk.g_object_unref(self._pixbuf)
def load_next(self):
return self._pixbuf is not None
@property
def width(self):
assert self._pixbuf is not None
return gdkpixbuf.gdk_pixbuf_get_width(self._pixbuf)
@property
def height(self):
assert self._pixbuf is not None
return gdkpixbuf.gdk_pixbuf_get_height(self._pixbuf)
@property
def channels(self):
assert self._pixbuf is not None
return gdkpixbuf.gdk_pixbuf_get_n_channels(self._pixbuf)
@property
def rowstride(self):
assert self._pixbuf is not None
return gdkpixbuf.gdk_pixbuf_get_rowstride(self._pixbuf)
@property
def has_alpha(self):
assert self._pixbuf is not None
return gdkpixbuf.gdk_pixbuf_get_has_alpha(self._pixbuf) == 1
def get_pixels(self):
pixels = gdkpixbuf.gdk_pixbuf_get_pixels(self._pixbuf)
assert pixels is not None
buf = (c_ubyte * (self.rowstride * self.height))()
memmove(buf, pixels, self.rowstride * (self.height - 1) + self.width * self.channels)
return buf
def to_image(self):
if self.width < 1 or self.height < 1 or self.channels < 1 or self.rowstride < 1:
return None
pixels = self.get_pixels()
# Determine appropriate GL type
if self.channels == 3:
format = 'RGB'
else:
format = 'RGBA'
return ImageData(self.width, self.height, format, pixels, -self.rowstride)
class GdkPixBufAnimation:
"""
Wrapper for a GdkPixBufIter for an animation.
"""
def __init__(self, loader, anim, gif_delays):
self._loader = loader
self._anim = anim
self._gif_delays = gif_delays
gdk.g_object_ref(anim)
def __del__(self):
if self._anim is not None:
gdk.g_object_unref(self._anim)
def __iter__(self):
time = GTimeVal(0, 0)
anim_iter = gdkpixbuf.gdk_pixbuf_animation_get_iter(self._anim, byref(time))
return GdkPixBufAnimationIterator(self._loader, anim_iter, time, self._gif_delays)
def to_animation(self):
return Animation(list(self))
class GdkPixBufAnimationIterator:
def __init__(self, loader, anim_iter, start_time, gif_delays):
self._iter = anim_iter
self._first = True
self._time = start_time
self._loader = loader
self._gif_delays = gif_delays
self.delay_time = None
def __del__(self):
if self._iter is not None:
gdk.g_object_unref(self._iter)
# The pixbuf returned by the iter is owned by the iter, so no need to destroy that one
def __iter__(self):
return self
def __next__(self):
self._advance()
frame = self.get_frame()
if frame is None:
raise StopIteration
return frame
def _advance(self):
if not self._gif_delays:
raise StopIteration
self.delay_time = self._gif_delays.pop(0)
if self._first:
self._first = False
else:
if self.gdk_delay_time == -1:
raise StopIteration
else:
gdk_delay = self.gdk_delay_time * 1000 # milliseconds to microseconds
us = self._time.tv_usec + gdk_delay
self._time.tv_sec += us // 1000000
self._time.tv_usec = us % 1000000
gdkpixbuf.gdk_pixbuf_animation_iter_advance(self._iter, byref(self._time))
def get_frame(self):
pixbuf = gdkpixbuf.gdk_pixbuf_animation_iter_get_pixbuf(self._iter)
if pixbuf is None:
return None
image = GdkPixBuf(self._loader, pixbuf).to_image()
return AnimationFrame(image, self.delay_time)
@property
def gdk_delay_time(self):
assert self._iter is not None
return gdkpixbuf.gdk_pixbuf_animation_iter_get_delay_time(self._iter)
class GdkPixbuf2ImageDecoder(ImageDecoder):
def get_file_extensions(self):
return ['.png', '.xpm', '.jpg', '.jpeg', '.tif', '.tiff', '.pnm',
'.ras', '.bmp', '.gif']
def get_animation_file_extensions(self):
return ['.gif', '.ani']
def decode(self, filename, file):
if not file:
file = open(filename, 'rb')
loader = GdkPixBufLoader(filename, file)
return loader.get_pixbuf().to_image()
def decode_animation(self, filename, file):
if not file:
file = open(filename, 'rb')
loader = GdkPixBufLoader(filename, file)
return loader.get_animation().to_animation()
def get_decoders():
return [GdkPixbuf2ImageDecoder()]
def get_encoders():
return []
def init():
gdk.g_type_init()
init()
|