windowscodecs: Move jpeg decoding to the unix lib.

dlls/windowscodecs/Makefile.in

@@ -22,6 +22,7 @@ C_SRCS = \
 	imgfactory.c \
 	info.c \
 	jpegformat.c \
+	libjpeg.c \
 	libpng.c \
 	libtiff.c \
 	main.c \

dlls/windowscodecs/decoder.c

@@ -460,6 +460,13 @@ static HRESULT WINAPI CommonDecoderFrame_GetColorContexts(IWICBitmapFrameDecode
 
     if (!pcActualCount) return E_INVALIDARG;
 
+    if (This->parent->file_info.flags & DECODER_FLAGS_UNSUPPORTED_COLOR_CONTEXT)
+    {
+        FIXME("not supported for %s\n", wine_dbgstr_guid(&This->parent->decoder_info.clsid));
+        *pcActualCount = 0;
+        return WINCODEC_ERR_UNSUPPORTEDOPERATION;
+    }
+
     *pcActualCount = This->decoder_frame.num_color_contexts;
 
     if (This->decoder_frame.num_color_contexts && cCount && ppIColorContexts)

dlls/windowscodecs/unix_lib.c

@@ -70,6 +70,9 @@ HRESULT CDECL decoder_create(const CLSID *decoder_clsid, struct decoder_info *in
     if (IsEqualGUID(decoder_clsid, &CLSID_WICTiffDecoder))
         return tiff_decoder_create(info, result);
 
+    if (IsEqualGUID(decoder_clsid, &CLSID_WICJpegDecoder))
+        return jpeg_decoder_create(info, result);
+
     return E_NOTIMPL;
 }
 

dlls/windowscodecs/wincodecs_private.h

@@ -262,6 +262,7 @@ struct decoder_info
 };
 
 #define DECODER_FLAGS_CAPABILITY_MASK 0x1f
+#define DECODER_FLAGS_UNSUPPORTED_COLOR_CONTEXT 0x80000000
 
 struct decoder_stat
 {
@@ -333,6 +334,7 @@ void CDECL decoder_destroy(struct decoder *This);
 
 HRESULT CDECL png_decoder_create(struct decoder_info *info, struct decoder **result);
 HRESULT CDECL tiff_decoder_create(struct decoder_info *info, struct decoder **result);
+HRESULT CDECL jpeg_decoder_create(struct decoder_info *info, struct decoder **result);
 
 struct unix_funcs
 {