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import warnings | |
from pyglet.image import * | |
from pyglet.image.codecs import * | |
from pyglet.libs.win32 import _kernel32 as kernel32 | |
from pyglet.libs.win32 import _ole32 as ole32 | |
from pyglet.libs.win32.constants import * | |
from pyglet.libs.win32.types import * | |
CLSID_WICImagingFactory1 = com.GUID(0xcacaf262, 0x9370, 0x4615, 0xa1, 0x3b, 0x9f, 0x55, 0x39, 0xda, 0x4c, 0xa) | |
CLSID_WICImagingFactory2 = com.GUID(0x317d06e8, 0x5f24, 0x433d, 0xbd, 0xf7, 0x79, 0xce, 0x68, 0xd8, 0xab, 0xc2) | |
# This is available with Windows 7 with a Platform Update, but unable to detect as it wasn't a version change to the OS, | |
# but a KB update. Available in atleast 8+. | |
if WINDOWS_8_OR_GREATER: | |
CLSID_WICImagingFactory = CLSID_WICImagingFactory2 | |
else: | |
CLSID_WICImagingFactory = CLSID_WICImagingFactory1 | |
WICBitmapCreateCacheOption = UINT | |
WICBitmapNoCache = 0 | |
WICBitmapCacheOnDemand = 0x1 | |
WICBitmapCacheOnLoad = 0x2 | |
WICBITMAPCREATECACHEOPTION_FORCE_DWORD = 0x7fffffff | |
WICBitmapPaletteType = UINT | |
WICBitmapPaletteTypeCustom = 0 | |
WICBitmapTransformOptions = UINT | |
WICBitmapTransformRotate0 = 0 | |
WICBitmapTransformRotate90 = 0x1 | |
WICBitmapTransformRotate180 = 0x2 | |
WICBitmapTransformRotate270 = 0x3 | |
WICBitmapTransformFlipHorizontal = 0x8 | |
WICBitmapTransformFlipVertical = 0x10 | |
WICBitmapDitherType = UINT | |
WICBitmapDitherTypeNone = 0 | |
WICBitmapDitherTypeSolid = 0 | |
WICBitmapDitherTypeOrdered4x4 = 0x1 | |
WICBitmapDitherTypeOrdered8x8 = 0x2 | |
WICBitmapDitherTypeOrdered16x16 = 0x3 | |
WICBitmapDitherTypeSpiral4x4 = 0x4 | |
WICBitmapDitherTypeSpiral8x8 = 0x5 | |
WICBitmapDitherTypeDualSpiral4x4 = 0x6 | |
WICBitmapDitherTypeDualSpiral8x8 = 0x7 | |
WICBitmapDitherTypeErrorDiffusion = 0x8 | |
WICBITMAPDITHERTYPE_FORCE_DWORD = 0x7fffffff | |
WICBITMAPTRANSFORMOPTIONS_FORCE_DWORD = 0x7fffffff | |
WICDecodeOptions = UINT | |
WICDecodeMetadataCacheOnDemand = 0 | |
WICDecodeMetadataCacheOnLoad = 0x1 | |
WICMETADATACACHEOPTION_FORCE_DWORD = 0x7fffffff | |
WICBitmapEncoderCacheOption = UINT | |
WICBitmapEncoderCacheInMemory = 0x0 | |
WICBitmapEncoderCacheTempFile = 0x1 | |
WICBitmapEncoderNoCache = 0x2 | |
WICBITMAPENCODERCACHEOPTION_FORCE_DWORD = 0x7fffffff | |
# Different pixel formats. | |
REFWICPixelFormatGUID = com.GUID | |
GUID_WICPixelFormatDontCare = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x00) | |
GUID_WICPixelFormat1bppIndexed = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x01) | |
GUID_WICPixelFormat2bppIndexed = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x02) | |
GUID_WICPixelFormat4bppIndexed = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x03) | |
GUID_WICPixelFormat8bppIndexed = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x04) | |
GUID_WICPixelFormatBlackWhite = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x05) | |
GUID_WICPixelFormat2bppGray = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x06) | |
GUID_WICPixelFormat4bppGray = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x07) | |
GUID_WICPixelFormat8bppGray = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x08) | |
GUID_WICPixelFormat8bppAlpha = com.GUID(0xe6cd0116, 0xeeba, 0x4161, 0xaa, 0x85, 0x27, 0xdd, 0x9f, 0xb3, 0xa8, 0x95) | |
GUID_WICPixelFormat16bppBGR555 = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x09) | |
GUID_WICPixelFormat16bppBGR565 = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0a) | |
GUID_WICPixelFormat16bppBGRA5551 = com.GUID(0x05ec7c2b, 0xf1e6, 0x4961, 0xad, 0x46, 0xe1, 0xcc, 0x81, 0x0a, 0x87, 0xd2) | |
GUID_WICPixelFormat16bppGray = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0b) | |
GUID_WICPixelFormat24bppBGR = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0c) | |
GUID_WICPixelFormat24bppRGB = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0d) | |
GUID_WICPixelFormat32bppBGR = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0e) | |
GUID_WICPixelFormat32bppBGRA = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x0f) | |
GUID_WICPixelFormat32bppPBGRA = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x10) | |
GUID_WICPixelFormat32bppRGB = com.GUID(0xd98c6b95, 0x3efe, 0x47d6, 0xbb, 0x25, 0xeb, 0x17, 0x48, 0xab, 0x0c, | |
0xf1) # 7 platform update? | |
GUID_WICPixelFormat32bppRGBA = com.GUID(0xf5c7ad2d, 0x6a8d, 0x43dd, 0xa7, 0xa8, 0xa2, 0x99, 0x35, 0x26, 0x1a, 0xe9) | |
GUID_WICPixelFormat32bppPRGBA = com.GUID(0x3cc4a650, 0xa527, 0x4d37, 0xa9, 0x16, 0x31, 0x42, 0xc7, 0xeb, 0xed, 0xba) | |
GUID_WICPixelFormat48bppRGB = com.GUID(0x6fddc324, 0x4e03, 0x4bfe, 0xb1, 0x85, 0x3d, 0x77, 0x76, 0x8d, 0xc9, 0x15) | |
GUID_WICPixelFormat48bppBGR = com.GUID(0xe605a384, 0xb468, 0x46ce, 0xbb, 0x2e, 0x36, 0xf1, 0x80, 0xe6, 0x43, 0x13) | |
GUID_ContainerFormatBmp = com.GUID(0x0af1d87e, 0xfcfe, 0x4188, 0xbd, 0xeb, 0xa7, 0x90, 0x64, 0x71, 0xcb, 0xe3) | |
GUID_ContainerFormatPng = com.GUID(0x1b7cfaf4, 0x713f, 0x473c, 0xbb, 0xcd, 0x61, 0x37, 0x42, 0x5f, 0xae, 0xaf) | |
GUID_ContainerFormatIco = com.GUID(0xa3a860c4, 0x338f, 0x4c17, 0x91, 0x9a, 0xfb, 0xa4, 0xb5, 0x62, 0x8f, 0x21) | |
GUID_ContainerFormatJpeg = com.GUID(0x19e4a5aa, 0x5662, 0x4fc5, 0xa0, 0xc0, 0x17, 0x58, 0x02, 0x8e, 0x10, 0x57) | |
GUID_ContainerFormatTiff = com.GUID(0x163bcc30, 0xe2e9, 0x4f0b, 0x96, 0x1d, 0xa3, 0xe9, 0xfd, 0xb7, 0x88, 0xa3) | |
GUID_ContainerFormatGif = com.GUID(0x1f8a5601, 0x7d4d, 0x4cbd, 0x9c, 0x82, 0x1b, 0xc8, 0xd4, 0xee, 0xb9, 0xa5) | |
GUID_ContainerFormatWmp = com.GUID(0x57a37caa, 0x367a, 0x4540, 0x91, 0x6b, 0xf1, 0x83, 0xc5, 0x09, 0x3a, 0x4b) | |
class IPropertyBag2(com.pIUnknown): | |
_methods_ = [ | |
('Read', | |
com.STDMETHOD()), | |
('Write', | |
com.STDMETHOD()), | |
('CountProperties', | |
com.STDMETHOD()), | |
('GetPropertyInfo', | |
com.STDMETHOD()), | |
('LoadObject', | |
com.STDMETHOD()) | |
] | |
class IWICPalette(com.pIUnknown): | |
_methods_ = [ | |
('InitializePredefined', | |
com.STDMETHOD()), | |
('InitializeCustom', | |
com.STDMETHOD()), | |
('InitializeFromBitmap', | |
com.STDMETHOD()), | |
('InitializeFromPalette', | |
com.STDMETHOD()), | |
('GetType', | |
com.STDMETHOD()), | |
('GetColorCount', | |
com.STDMETHOD()), | |
('GetColors', | |
com.STDMETHOD()), | |
('IsBlackWhite', | |
com.STDMETHOD()), | |
('IsGrayscale', | |
com.STDMETHOD()), | |
('HasAlpha', | |
com.STDMETHOD()), | |
] | |
class IWICStream(IStream, com.pIUnknown): | |
_methods_ = [ | |
('InitializeFromIStream', | |
com.STDMETHOD(IStream)), | |
('InitializeFromFilename', | |
com.STDMETHOD(LPCWSTR, DWORD)), | |
('InitializeFromMemory', | |
com.STDMETHOD(POINTER(BYTE), DWORD)), | |
('InitializeFromIStreamRegion', | |
com.STDMETHOD()), | |
] | |
class IWICBitmapFrameEncode(com.pIUnknown): | |
_methods_ = [ | |
('Initialize', | |
com.STDMETHOD(IPropertyBag2)), | |
('SetSize', | |
com.STDMETHOD(UINT, UINT)), | |
('SetResolution', | |
com.STDMETHOD()), | |
('SetPixelFormat', | |
com.STDMETHOD(POINTER(REFWICPixelFormatGUID))), | |
('SetColorContexts', | |
com.STDMETHOD()), | |
('SetPalette', | |
com.STDMETHOD(IWICPalette)), | |
('SetThumbnail', | |
com.STDMETHOD()), | |
('WritePixels', | |
com.STDMETHOD(UINT, UINT, UINT, POINTER(BYTE))), | |
('WriteSource', | |
com.STDMETHOD()), | |
('Commit', | |
com.STDMETHOD()), | |
('GetMetadataQueryWriter', | |
com.STDMETHOD()) | |
] | |
class IWICBitmapEncoder(com.pIUnknown): | |
_methods_ = [ | |
('Initialize', | |
com.STDMETHOD(IWICStream, WICBitmapEncoderCacheOption)), | |
('GetContainerFormat', | |
com.STDMETHOD()), | |
('GetEncoderInfo', | |
com.STDMETHOD()), | |
('SetColorContexts', | |
com.STDMETHOD()), | |
('SetPalette', | |
com.STDMETHOD()), | |
('SetThumbnail', | |
com.STDMETHOD()), | |
('SetPreview', | |
com.STDMETHOD()), | |
('CreateNewFrame', | |
com.STDMETHOD(POINTER(IWICBitmapFrameEncode), POINTER(IPropertyBag2))), | |
('Commit', | |
com.STDMETHOD()), | |
('GetMetadataQueryWriter', | |
com.STDMETHOD()) | |
] | |
class IWICComponentInfo(com.pIUnknown): | |
_methods_ = [ | |
('GetComponentType', | |
com.STDMETHOD()), | |
('GetCLSID', | |
com.STDMETHOD()), | |
('GetSigningStatus', | |
com.STDMETHOD()), | |
('GetAuthor', | |
com.STDMETHOD()), | |
('GetVendorGUID', | |
com.STDMETHOD()), | |
('GetVersion', | |
com.STDMETHOD()), | |
('GetSpecVersion', | |
com.STDMETHOD()), | |
('GetFriendlyName', | |
com.STDMETHOD()) | |
] | |
class IWICPixelFormatInfo(IWICComponentInfo, com.pIUnknown): | |
_methods_ = [ | |
('GetFormatGUID', | |
com.STDMETHOD(POINTER(com.GUID))), | |
('GetColorContext', | |
com.STDMETHOD()), | |
('GetBitsPerPixel', | |
com.STDMETHOD(POINTER(UINT))), | |
('GetChannelCount', | |
com.STDMETHOD(POINTER(UINT))), | |
('GetChannelMask', | |
com.STDMETHOD()) | |
] | |
class IWICBitmapSource(com.pIUnknown): | |
_methods_ = [ | |
('GetSize', | |
com.STDMETHOD(POINTER(UINT), POINTER(UINT))), | |
('GetPixelFormat', | |
com.STDMETHOD(POINTER(REFWICPixelFormatGUID))), | |
('GetResolution', | |
com.STDMETHOD(POINTER(DOUBLE), POINTER(DOUBLE))), | |
('CopyPalette', | |
com.STDMETHOD()), | |
('CopyPixels', | |
com.STDMETHOD(c_void_p, UINT, UINT, c_void_p)), | |
] | |
class IWICFormatConverter(IWICBitmapSource, com.pIUnknown): | |
_methods_ = [ | |
('Initialize', | |
com.STDMETHOD(IWICBitmapSource, POINTER(REFWICPixelFormatGUID), WICBitmapDitherType, c_void_p, DOUBLE, | |
WICBitmapPaletteType)), | |
('CanConvert', | |
com.STDMETHOD(POINTER(REFWICPixelFormatGUID), POINTER(REFWICPixelFormatGUID), POINTER(BOOL))), | |
] | |
class IWICMetadataQueryReader(com.pIUnknown): | |
_methods_ = [ | |
('GetContainerFormat', | |
com.STDMETHOD()), | |
('GetLocation', | |
com.STDMETHOD()), | |
('GetMetadataByName', | |
com.STDMETHOD(LPCWSTR, c_void_p)), | |
('GetEnumerator', | |
com.STDMETHOD()), | |
] | |
class IWICBitmapFrameDecode(IWICBitmapSource, com.pIUnknown): | |
_methods_ = [ | |
('GetMetadataQueryReader', | |
com.STDMETHOD(POINTER(IWICMetadataQueryReader))), | |
('GetColorContexts', | |
com.STDMETHOD()), | |
('GetThumbnail', | |
com.STDMETHOD(POINTER(IWICBitmapSource))), | |
] | |
class IWICBitmapFlipRotator(IWICBitmapSource, com.pIUnknown): | |
_methods_ = [ | |
('Initialize', | |
com.STDMETHOD(IWICBitmapSource, WICBitmapTransformOptions)), | |
] | |
class IWICBitmap(IWICBitmapSource, com.pIUnknown): | |
_methods_ = [ | |
('Lock', | |
com.STDMETHOD()), | |
('SetPalette', | |
com.STDMETHOD()), | |
('SetResolution', | |
com.STDMETHOD()) | |
] | |
class IWICBitmapDecoder(com.pIUnknown): | |
_methods_ = [ | |
('QueryCapability', | |
com.STDMETHOD()), | |
('Initialize', | |
com.STDMETHOD()), | |
('GetContainerFormat', | |
com.STDMETHOD()), | |
('GetDecoderInfo', | |
com.STDMETHOD()), | |
('CopyPalette', | |
com.STDMETHOD()), | |
('GetMetadataQueryReader', | |
com.STDMETHOD(POINTER(IWICMetadataQueryReader))), | |
('GetPreview', | |
com.STDMETHOD()), | |
('GetColorContexts', | |
com.STDMETHOD()), | |
('GetThumbnail', | |
com.STDMETHOD()), | |
('GetFrameCount', | |
com.STDMETHOD(POINTER(UINT))), | |
('GetFrame', | |
com.STDMETHOD(UINT, POINTER(IWICBitmapFrameDecode))), | |
] | |
IID_IWICImagingFactory1 = com.GUID(0xec5ec8a9, 0xc395, 0x4314, 0x9c, 0x77, 0x54, 0xd7, 0xa9, 0x35, 0xff, 0x70) | |
IID_IWICImagingFactory2 = com.GUID(0x7B816B45, 0x1996, 0x4476, 0xB1, 0x32, 0xDE, 0x9E, 0x24, 0x7C, 0x8A, 0xF0) | |
if WINDOWS_8_OR_GREATER: | |
IID_IWICImagingFactory = IID_IWICImagingFactory2 | |
else: | |
IID_IWICImagingFactory = IID_IWICImagingFactory1 | |
IID_IWICPixelFormatInfo = com.GUID(0xE8EDA601, 0x3D48, 0x431a, 0xAB, 0x44, 0x69, 0x05, 0x9B, 0xE8, 0x8B, 0xBE) | |
class IWICImagingFactory(com.pIUnknown): | |
_methods_ = [ | |
('CreateDecoderFromFilename', | |
com.STDMETHOD(LPCWSTR, com.GUID, DWORD, WICDecodeOptions, POINTER(IWICBitmapDecoder))), | |
('CreateDecoderFromStream', | |
com.STDMETHOD(com.pIUnknown, c_void_p, WICDecodeOptions, POINTER(IWICBitmapDecoder))), | |
('CreateDecoderFromFileHandle', | |
com.STDMETHOD()), | |
('CreateComponentInfo', | |
com.STDMETHOD(com.GUID, POINTER(IWICComponentInfo))), | |
('CreateDecoder', | |
com.STDMETHOD()), | |
('CreateEncoder', | |
com.STDMETHOD(POINTER(com.GUID), POINTER(com.GUID), POINTER(IWICBitmapEncoder))), | |
('CreatePalette', | |
com.STDMETHOD(POINTER(IWICPalette))), | |
('CreateFormatConverter', | |
com.STDMETHOD(POINTER(IWICFormatConverter))), | |
('CreateBitmapScaler', | |
com.STDMETHOD()), | |
('CreateBitmapClipper', | |
com.STDMETHOD()), | |
('CreateBitmapFlipRotator', | |
com.STDMETHOD(POINTER(IWICBitmapFlipRotator))), | |
('CreateStream', | |
com.STDMETHOD(POINTER(IWICStream))), | |
('CreateColorContext', | |
com.STDMETHOD()), | |
('CreateColorTransformer', | |
com.STDMETHOD()), | |
('CreateBitmap', | |
com.STDMETHOD(UINT, UINT, POINTER(REFWICPixelFormatGUID), WICBitmapCreateCacheOption, POINTER(IWICBitmap))), | |
('CreateBitmapFromSource', | |
com.STDMETHOD()), | |
('CreateBitmapFromSourceRect', | |
com.STDMETHOD()), | |
('CreateBitmapFromMemory', | |
com.STDMETHOD(UINT, UINT, REFWICPixelFormatGUID, UINT, UINT, POINTER(BYTE), POINTER(IWICBitmap))), | |
('CreateBitmapFromHBITMAP', | |
com.STDMETHOD()), | |
('CreateBitmapFromHICON', | |
com.STDMETHOD()), | |
('CreateComponentEnumerator', | |
com.STDMETHOD()), | |
('CreateFastMetadataEncoderFromDecoder', | |
com.STDMETHOD()), | |
('CreateFastMetadataEncoderFromFrameDecode', | |
com.STDMETHOD()), | |
('CreateQueryWriter', | |
com.STDMETHOD()), | |
('CreateQueryWriterFromReader', | |
com.STDMETHOD()) | |
] | |
_factory = IWICImagingFactory() | |
ole32.CoCreateInstance(CLSID_WICImagingFactory, | |
None, | |
CLSCTX_INPROC_SERVER, | |
IID_IWICImagingFactory, | |
byref(_factory)) | |
class WICDecoder(ImageDecoder): | |
"""Windows Imaging Component. | |
This decoder is a replacement for GDI and GDI+ starting with Windows 7 with more features up to Windows 10.""" | |
def __init__(self): | |
super(ImageDecoder, self).__init__() | |
self._factory = _factory | |
def get_file_extensions(self): | |
return ['.bmp', '.jpg', '.jpeg', '.png', '.tif', '.tiff', '.ico', '.jxr', '.hdp', '.wdp'] | |
def _load_bitmap_decoder(self, filename, file): | |
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 = com.pIUnknown() | |
ole32.CreateStreamOnHGlobal(hglob, True, byref(stream)) | |
# Load image from stream | |
decoder = IWICBitmapDecoder() | |
status = self._factory.CreateDecoderFromStream(stream, None, WICDecodeMetadataCacheOnDemand, byref(decoder)) | |
if status != 0: | |
stream.Release() | |
raise ImageDecodeException('WIC cannot load %r' % (filename or file)) | |
return decoder, stream | |
def _get_bitmap_frame(self, bitmap_decoder, frame_index): | |
bitmap = IWICBitmapFrameDecode() | |
bitmap_decoder.GetFrame(frame_index, byref(bitmap)) | |
return bitmap | |
def get_image(self, bitmap, target_fmt=GUID_WICPixelFormat32bppBGRA): | |
"""Get's image from bitmap, specifying target format, bitmap is released before returning.""" | |
width = UINT() | |
height = UINT() | |
bitmap.GetSize(byref(width), byref(height)) | |
width = int(width.value) | |
height = int(height.value) | |
# Get image pixel format | |
pf = com.GUID(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0) | |
bitmap.GetPixelFormat(byref(pf)) | |
fmt = 'BGRA' | |
# If target format is not what we want (32bit BGRA) convert it. | |
if pf != target_fmt: | |
converter = IWICFormatConverter() | |
self._factory.CreateFormatConverter(byref(converter)) | |
conversion_possible = BOOL() | |
converter.CanConvert(pf, target_fmt, byref(conversion_possible)) | |
# 99% of the time conversion will be possible to default. | |
# However, we check to be safe and fallback to 24 bit BGR if not possible. | |
if not conversion_possible: | |
target_fmt = GUID_WICPixelFormat24bppBGR | |
fmt = 'BGR' | |
converter.Initialize(bitmap, target_fmt, WICBitmapDitherTypeNone, None, 0, WICBitmapPaletteTypeCustom) | |
bitmap.Release() | |
bitmap = converter | |
# Most images are loaded with a negative pitch, which requires list comprehension to fix. | |
# Create a flipped bitmap through the decoder rather through Python to increase performance. | |
flipper = IWICBitmapFlipRotator() | |
self._factory.CreateBitmapFlipRotator(byref(flipper)) | |
flipper.Initialize(bitmap, WICBitmapTransformFlipVertical) | |
stride = len(fmt) * width | |
buffer_size = stride * height | |
buffer = (BYTE * buffer_size)() | |
flipper.CopyPixels(None, stride, buffer_size, byref(buffer)) | |
flipper.Release() | |
bitmap.Release() # Can be converter. | |
return ImageData(width, height, fmt, buffer) | |
def _delete_bitmap_decoder(self, bitmap_decoder, stream): | |
# Release decoder and stream | |
bitmap_decoder.Release() | |
stream.Release() | |
def decode(self, filename, file): | |
if not file: | |
file = open(filename, 'rb') | |
bitmap_decoder, stream = self._load_bitmap_decoder(filename, file) | |
bitmap = self._get_bitmap_frame(bitmap_decoder, 0) | |
image = self.get_image(bitmap) | |
self._delete_bitmap_decoder(bitmap_decoder, stream) | |
return image | |
def get_property_value(reader, metadata_name): | |
""" | |
Uses a metadata name and reader to return a single value. Can be used to get metadata from images. | |
If failure, returns 0. | |
Also handles cleanup of PROPVARIANT. | |
""" | |
try: | |
prop = PROPVARIANT() | |
reader.GetMetadataByName(metadata_name, byref(prop)) | |
value = prop.llVal | |
ole32.PropVariantClear(byref(prop)) | |
except OSError: | |
value = 0 | |
return value | |
def get_decoders(): | |
return [WICDecoder()] | |
extension_to_container = { | |
'.bmp': GUID_ContainerFormatBmp, | |
'.jpg': GUID_ContainerFormatJpeg, | |
'.jpeg': GUID_ContainerFormatJpeg, | |
'.tif': GUID_ContainerFormatTiff, | |
'.tiff': GUID_ContainerFormatTiff, | |
'.wmp': GUID_ContainerFormatWmp, | |
'.jxr': GUID_ContainerFormatWmp, | |
'.wdp': GUID_ContainerFormatWmp, | |
'.png': GUID_ContainerFormatPng, | |
} | |
class WICEncoder(ImageEncoder): | |
def get_file_extensions(self): | |
return [ext for ext in extension_to_container] | |
def encode(self, image, filename, file): | |
image = image.get_image_data() | |
wicstream = IWICStream() | |
encoder = IWICBitmapEncoder() | |
frame = IWICBitmapFrameEncode() | |
property_bag = IPropertyBag2() | |
ext = (filename and os.path.splitext(filename)[1]) or '.png' | |
# Choose container based on extension. Default to PNG. | |
container = extension_to_container.get(ext, GUID_ContainerFormatPng) | |
_factory.CreateStream(byref(wicstream)) | |
# https://docs.microsoft.com/en-us/windows/win32/wic/-wic-codec-native-pixel-formats#native-image-formats | |
if container == GUID_ContainerFormatJpeg: | |
# Expects BGR, no transparency available. Hard coded. | |
fmt = 'BGR' | |
default_format = GUID_WICPixelFormat24bppBGR | |
else: | |
# Windows encodes in BGRA. | |
if len(image.format) == 3: | |
fmt = 'BGR' | |
default_format = GUID_WICPixelFormat24bppBGR | |
else: | |
fmt = 'BGRA' | |
default_format = GUID_WICPixelFormat32bppBGRA | |
pitch = image.width * len(fmt) | |
image_data = image.get_data(fmt, -pitch) | |
size = pitch * image.height | |
if file: | |
istream = IStream() | |
ole32.CreateStreamOnHGlobal(None, True, byref(istream)) | |
wicstream.InitializeFromIStream(istream) | |
else: | |
wicstream.InitializeFromFilename(filename, GENERIC_WRITE) | |
_factory.CreateEncoder(container, None, byref(encoder)) | |
encoder.Initialize(wicstream, WICBitmapEncoderNoCache) | |
encoder.CreateNewFrame(byref(frame), byref(property_bag)) | |
frame.Initialize(property_bag) | |
frame.SetSize(image.width, image.height) | |
frame.SetPixelFormat(byref(default_format)) | |
data = (c_byte * size).from_buffer(bytearray(image_data)) | |
frame.WritePixels(image.height, abs(image.pitch), size, data) | |
frame.Commit() | |
encoder.Commit() | |
if file: | |
sts = STATSTG() | |
istream.Stat(byref(sts), 0) | |
stream_size = sts.cbSize | |
istream.Seek(0, STREAM_SEEK_SET, None) | |
buf = (BYTE * stream_size)() | |
written = ULONG() | |
istream.Read(byref(buf), stream_size, byref(written)) | |
if written.value == stream_size: | |
file.write(buf) | |
else: | |
print(f"Failed to read all of the data from stream attempting to save {file}") | |
istream.Release() | |
encoder.Release() | |
frame.Release() | |
property_bag.Release() | |
wicstream.Release() | |
def get_encoders(): | |
return [WICEncoder()] | |