# ----------------------------------------------------------------------------
# pyglet
# Copyright (c) 2006-2008 Alex Holkner
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# * Neither the name of pyglet nor the names of its
# contributors may be used to endorse or promote products
# derived from this software without specific prior written
# permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
# ----------------------------------------------------------------------------
'''
'''
__docformat__ = 'restructuredtext'
__version__ = '$Id: pil.py 163 2006-11-13 04:15:46Z Alex.Holkner $'
from ctypes import *
from pyglet.gl import *
from pyglet.image import *
from pyglet.image.codecs import *
from pyglet.window.win32.constants import *
from pyglet.window.win32.types import *
ole32 = windll.ole32
kernel32 = windll.kernel32
gdiplus = windll.gdiplus
LPSTREAM = c_void_p
REAL = c_float
PixelFormat1bppIndexed = 196865
PixelFormat4bppIndexed = 197634
PixelFormat8bppIndexed = 198659
PixelFormat16bppGrayScale = 1052676
PixelFormat16bppRGB555 = 135173
PixelFormat16bppRGB565 = 135174
PixelFormat16bppARGB1555 = 397319
PixelFormat24bppRGB = 137224
PixelFormat32bppRGB = 139273
PixelFormat32bppARGB = 2498570
PixelFormat32bppPARGB = 925707
PixelFormat48bppRGB = 1060876
PixelFormat64bppARGB = 3424269
PixelFormat64bppPARGB = 29622286
PixelFormatMax = 15
ImageLockModeRead = 1
ImageLockModeWrite = 2
ImageLockModeUserInputBuf = 4
class GdiplusStartupInput(Structure):
_fields_ = [
('GdiplusVersion', c_uint32),
('DebugEventCallback', c_void_p),
('SuppressBackgroundThread', BOOL),
('SuppressExternalCodecs', BOOL)
]
class GdiplusStartupOutput(Structure):
_fields = [
('NotificationHookProc', c_void_p),
('NotificationUnhookProc', c_void_p)
]
class BitmapData(Structure):
_fields_ = [
('Width', c_uint),
('Height', c_uint),
('Stride', c_int),
('PixelFormat', c_int),
('Scan0', POINTER(c_byte)),
('Reserved', POINTER(c_uint))
]
class Rect(Structure):
_fields_ = [
('X', c_int),
('Y', c_int),
('Width', c_int),
('Height', c_int)
]
kernel32.GlobalAlloc.restype = HGLOBAL
kernel32.GlobalLock.restype = c_void_p
PropertyTagFrameDelay = 0x5100
class PropertyItem(Structure):
_fields_ = [
('id', c_uint),
('length', c_ulong),
('type', c_short),
('value', c_void_p)
]
class GDIPlusDecoder(ImageDecoder):
def get_file_extensions(self):
return ['.bmp', '.gif', '.jpg', '.jpeg', '.exif', '.png', '.tif',
'.tiff']
def get_animation_file_extensions(self):
# TIFF also supported as a multi-page image; but that's not really an
# animation, is it?
return ['.gif']
def _load_bitmap(self, file, filename):
data = file.read()
# Create a HGLOBAL with image data
hglob = kernel32.GlobalAlloc(GMEM_MOVEABLE, len(data))
ptr = kernel32.GlobalLock(hglob)
memmove(ptr, data, len(data))
kernel32.GlobalUnlock(hglob)
# Create IStream for the HGLOBAL
stream = LPSTREAM()
ole32.CreateStreamOnHGlobal(hglob, True, byref(stream))
# Load image from stream
bitmap = c_void_p()
status = gdiplus.GdipCreateBitmapFromStream(stream, byref(bitmap))
if status != 0:
# TODO release stream
raise ImageDecodeException(
'GDI+ cannot load %r' % (filename or file))
return bitmap
def _get_image(self, bitmap):
# Get size of image (Bitmap subclasses Image)
width = REAL()
height = REAL()
gdiplus.GdipGetImageDimension(bitmap, byref(width), byref(height))
width = int(width.value)
height = int(height.value)
# Get image pixel format
pf = c_int()
gdiplus.GdipGetImagePixelFormat(bitmap, byref(pf))
pf = pf.value
# Reverse from what's documented because of Intel little-endianness.
format = 'BGRA'
if pf == PixelFormat24bppRGB:
format = 'BGR'
elif pf == PixelFormat32bppRGB:
pass
elif pf == PixelFormat32bppARGB:
pass
elif pf in (PixelFormat16bppARGB1555, PixelFormat32bppPARGB,
PixelFormat64bppARGB, PixelFormat64bppPARGB):
pf = PixelFormat32bppARGB
else:
format = 'BGR'
pf = PixelFormat24bppRGB
# Lock pixel data in best format
rect = Rect()
rect.X = 0
rect.Y = 0
rect.Width = width
rect.Height = height
bitmap_data = BitmapData()
gdiplus.GdipBitmapLockBits(bitmap,
byref(rect), ImageLockModeRead, pf, byref(bitmap_data))
# Create buffer for RawImage
buffer = create_string_buffer(bitmap_data.Stride * height)
memmove(buffer, bitmap_data.Scan0, len(buffer))
# Unlock data
gdiplus.GdipBitmapUnlockBits(bitmap, byref(bitmap_data))
return ImageData(width, height, format, buffer, -bitmap_data.Stride)
def _delete_bitmap(self, bitmap):
# Release image and stream
gdiplus.GdipDisposeImage(bitmap)
# TODO: How to call IUnknown::Release on stream?
def decode(self, file, filename):
bitmap = self._load_bitmap(file, filename)
image = self._get_image(bitmap)
self._delete_bitmap(bitmap)
return image
def decode_animation(self, file, filename):
bitmap = self._load_bitmap(file, filename)
dimension_count = c_uint()
gdiplus.GdipImageGetFrameDimensionsCount(bitmap, byref(dimension_count))
if dimension_count.value < 1:
self._delete_bitmap(bitmap)
raise ImageDecodeException('Image has no frame dimensions')
# XXX Make sure this dimension is time?
dimensions = (c_void_p * dimension_count.value)()
gdiplus.GdipImageGetFrameDimensionsList(bitmap, dimensions,
dimension_count.value)
frame_count = c_uint()
gdiplus.GdipImageGetFrameCount(bitmap, dimensions, byref(frame_count))
prop_id = PropertyTagFrameDelay
prop_size = c_uint()
gdiplus.GdipGetPropertyItemSize(bitmap, prop_id, byref(prop_size))
prop_buffer = c_buffer(prop_size.value)
prop_item = cast(prop_buffer, POINTER(PropertyItem)).contents
gdiplus.GdipGetPropertyItem(bitmap, prop_id, prop_size.value,
prop_buffer)
# XXX Sure it's long?
n_delays = prop_item.length / sizeof(c_long)
delays = cast(prop_item.value, POINTER(c_long * n_delays)).contents
frames = []
for i in range(frame_count.value):
gdiplus.GdipImageSelectActiveFrame(bitmap, dimensions, i)
image = self._get_image(bitmap)
delay = delays[i]
if delay <= 1:
delay = 10
frames.append(AnimationFrame(image, delay/100.))
self._delete_bitmap(bitmap)
return Animation(frames)
def get_decoders():
return [GDIPlusDecoder()]
def get_encoders():
return []
def init():
token = c_ulong()
startup_in = GdiplusStartupInput()
startup_in.GdiplusVersion = 1
startup_out = GdiplusStartupOutput()
gdiplus.GdiplusStartup(byref(token), byref(startup_in), byref(startup_out))
# Shutdown later?
# gdiplus.GdiplusShutdown(token)
init()
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