Dmitry Timoshkov : windowscodecs: Implement GetPreview in the PNG decoder.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 560cfedcba6cce24691eb55438ccc4e47a6916db
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=560cfedcba6cce24691eb55438ccc4e47a6916db

Author: Dmitry Timoshkov <dmitry at baikal.ru>
Date:   Mon Dec 10 11:44:37 2012 +0800

windowscodecs: Implement GetPreview in the PNG decoder.

---

 dlls/windowscodecs/pngformat.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/dlls/windowscodecs/pngformat.c b/dlls/windowscodecs/pngformat.c
index 051c60c..fb45804 100644
--- a/dlls/windowscodecs/pngformat.c
+++ b/dlls/windowscodecs/pngformat.c
@@ -630,8 +630,12 @@ static HRESULT WINAPI PngDecoder_GetMetadataQueryReader(IWICBitmapDecoder *iface
 static HRESULT WINAPI PngDecoder_GetPreview(IWICBitmapDecoder *iface,
     IWICBitmapSource **ppIBitmapSource)
 {
-    FIXME("(%p,%p): stub\n", iface, ppIBitmapSource);
-    return E_NOTIMPL;
+    TRACE("(%p,%p)\n", iface, ppIBitmapSource);
+
+    if (!ppIBitmapSource) return E_INVALIDARG;
+
+    *ppIBitmapSource = NULL;
+    return WINCODEC_ERR_UNSUPPORTEDOPERATION;
 }
 
 static HRESULT WINAPI PngDecoder_GetColorContexts(IWICBitmapDecoder *iface,