windowscodecs: Add initial implementation of the GIF encoder.

dlls/gdiplus/tests/image.c

@@ -5115,14 +5115,13 @@ static void test_supported_encoders(void)
     {
         LPCWSTR mime;
         const GUID *format;
-        BOOL todo;
     } td[] =
     {
-        { bmp_mimetype, &ImageFormatBMP, FALSE },
-        { jpeg_mimetype, &ImageFormatJPEG, FALSE },
-        { gif_mimetype, &ImageFormatGIF, TRUE },
-        { tiff_mimetype, &ImageFormatTIFF, FALSE },
-        { png_mimetype, &ImageFormatPNG, FALSE }
+        { bmp_mimetype, &ImageFormatBMP },
+        { jpeg_mimetype, &ImageFormatJPEG },
+        { gif_mimetype, &ImageFormatGIF },
+        { tiff_mimetype, &ImageFormatTIFF },
+        { png_mimetype, &ImageFormatPNG }
     };
     GUID format, clsid;
     BOOL ret;
@@ -5148,8 +5147,7 @@ static void test_supported_encoders(void)
         ok(hr == S_OK, "CreateStreamOnHGlobal error %#x\n", hr);
 
         status = GdipSaveImageToStream((GpImage *)bm, stream, &clsid, NULL);
-        todo_wine_if (td[i].todo)
-            ok(status == Ok, "GdipSaveImageToStream error %d\n", status);
+        ok(status == Ok, "GdipSaveImageToStream error %d\n", status);
 
         IStream_Release(stream);
     }

dlls/windowscodecs/clsfactory.c

@@ -52,6 +52,7 @@ static const classinfo wic_classes[] = {
     {&CLSID_WICPngEncoder, PngEncoder_CreateInstance},
     {&CLSID_WICBmpEncoder, BmpEncoder_CreateInstance},
     {&CLSID_WICGifDecoder, GifDecoder_CreateInstance},
+    {&CLSID_WICGifEncoder, GifEncoder_CreateInstance},
     {&CLSID_WICIcoDecoder, IcoDecoder_CreateInstance},
     {&CLSID_WICJpegDecoder, JpegDecoder_CreateInstance},
     {&CLSID_WICJpegEncoder, JpegEncoder_CreateInstance},

dlls/windowscodecs/regsvr.c

@@ -1434,6 +1434,16 @@ static struct regsvr_encoder const encoder_list[] = {
 	".bmp,.dib,.rle",
 	bmp_encode_formats
     },
+    {   &CLSID_WICGifEncoder,
+	"The Wine Project",
+	"GIF Encoder",
+	"1.0.0.0",
+	&GUID_VendorMicrosoft,
+	&GUID_ContainerFormatGif,
+	"image/gif",
+	".gif",
+	gif_formats
+    },
     {   &CLSID_WICJpegEncoder,
 	"The Wine Project",
 	"JPEG Encoder",

dlls/windowscodecs/wincodecs_private.h

@@ -143,6 +143,7 @@ extern HRESULT PngEncoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN
 extern HRESULT BmpEncoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;
 extern HRESULT DibDecoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;
 extern HRESULT GifDecoder_CreateInstance(REFIID riid, void** ppv) DECLSPEC_HIDDEN;
+extern HRESULT GifEncoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;
 extern HRESULT IcoDecoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;
 extern HRESULT JpegDecoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;
 extern HRESULT JpegEncoder_CreateInstance(REFIID iid, void** ppv) DECLSPEC_HIDDEN;

dlls/windowscodecs/windowscodecs_wincodec.idl

@@ -77,6 +77,13 @@ coclass WICBmpEncoder { interface IWICBitmapEncoder; }
 coclass WICGifDecoder { interface IWICBitmapDecoder; }
 
 [
+    helpstring("WIC GIF Encoder"),
+    threading(both),
+    uuid(114f5598-0b22-40a0-86a1-c83ea495adbd)
+]
+coclass WICGifEncoder { interface IWICBitmapEncoder; }
+
+[
     helpstring("WIC ICO Decoder"),
     threading(both),
     uuid(c61bfcdf-2e0f-4aad-a8d7-e06bafebcdfe)