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