wincodecs: Add a helper for GetDecoderInfo().

dlls/windowscodecs/bmpdecode.c

@@ -1068,20 +1068,9 @@ static HRESULT WINAPI BmpDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI BmpDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICBmpDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICBmpDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI BmpDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/gifformat.c

@@ -1170,20 +1170,9 @@ static HRESULT WINAPI GifDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI GifDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICGifDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICGifDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface, IWICPalette *palette)

dlls/windowscodecs/icoformat.c

@@ -556,20 +556,9 @@ static HRESULT WINAPI IcoDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI IcoDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICIcoDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICIcoDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI IcoDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/info.c

@@ -2029,6 +2029,22 @@ void ReleaseComponentInfos(void)
         IWICComponentInfo_Release(&info->IWICComponentInfo_iface);
 }
 
+HRESULT get_decoder_info(const CLSID *clsid, IWICBitmapDecoderInfo **info)
+{
+    IWICComponentInfo *compinfo;
+    HRESULT hr;
+
+    hr = CreateComponentInfo(clsid, &compinfo);
+    if (FAILED(hr)) return hr;
+
+    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
+        (void **)info);
+
+    IWICComponentInfo_Release(compinfo);
+
+    return hr;
+}
+
 typedef struct {
     IEnumUnknown IEnumUnknown_iface;
     LONG ref;

dlls/windowscodecs/jpegformat.c

@@ -398,20 +398,9 @@ static HRESULT WINAPI JpegDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI JpegDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICJpegDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICJpegDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI JpegDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/pngformat.c

@@ -829,20 +829,9 @@ static HRESULT WINAPI PngDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI PngDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICPngDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICPngDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI PngDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/tgaformat.c

@@ -360,20 +360,9 @@ static HRESULT WINAPI TgaDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI TgaDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WineTgaDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WineTgaDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI TgaDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/tiffformat.c

@@ -672,20 +672,9 @@ static HRESULT WINAPI TiffDecoder_GetContainerFormat(IWICBitmapDecoder *iface,
 static HRESULT WINAPI TiffDecoder_GetDecoderInfo(IWICBitmapDecoder *iface,
     IWICBitmapDecoderInfo **ppIDecoderInfo)
 {
-    HRESULT hr;
-    IWICComponentInfo *compinfo;
-
     TRACE("(%p,%p)\n", iface, ppIDecoderInfo);
 
-    hr = CreateComponentInfo(&CLSID_WICTiffDecoder, &compinfo);
-    if (FAILED(hr)) return hr;
-
-    hr = IWICComponentInfo_QueryInterface(compinfo, &IID_IWICBitmapDecoderInfo,
-        (void**)ppIDecoderInfo);
-
-    IWICComponentInfo_Release(compinfo);
-
-    return hr;
+    return get_decoder_info(&CLSID_WICTiffDecoder, ppIDecoderInfo);
 }
 
 static HRESULT WINAPI TiffDecoder_CopyPalette(IWICBitmapDecoder *iface,

dlls/windowscodecs/wincodecs_private.h

@@ -126,6 +126,7 @@ extern HRESULT CreatePropertyBag2(const PROPBAG2 *options, UINT count,
 extern HRESULT CreateComponentInfo(REFCLSID clsid, IWICComponentInfo **ppIInfo) DECLSPEC_HIDDEN;
 extern void ReleaseComponentInfos(void) DECLSPEC_HIDDEN;
 extern HRESULT CreateComponentEnumerator(DWORD componentTypes, DWORD options, IEnumUnknown **ppIEnumUnknown) DECLSPEC_HIDDEN;
+extern HRESULT get_decoder_info(REFCLSID clsid, IWICBitmapDecoderInfo **info) DECLSPEC_HIDDEN;
 
 typedef struct BmpDecoder BmpDecoder;