Dmitry Timoshkov : windowscodecs: Reimplement GetFrameCount of the GIF decoder.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 892c16e6611fa70c28558c93ac3228617fb1fa15
URL:    http://source.winehq.org/git/wine.git/?a=commit;h=892c16e6611fa70c28558c93ac3228617fb1fa15

Author: Dmitry Timoshkov <dmitry at baikal.ru>
Date:   Thu Nov 22 18:26:28 2012 +0800

windowscodecs: Reimplement GetFrameCount of the GIF decoder.

---

 dlls/windowscodecs/gifformat.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/dlls/windowscodecs/gifformat.c b/dlls/windowscodecs/gifformat.c
index 4fa10e0..eb8a37b 100644
--- a/dlls/windowscodecs/gifformat.c
+++ b/dlls/windowscodecs/gifformat.c
@@ -1241,13 +1241,14 @@ static HRESULT WINAPI GifDecoder_GetFrameCount(IWICBitmapDecoder *iface,
     UINT *pCount)
 {
     GifDecoder *This = impl_from_IWICBitmapDecoder(iface);
-    TRACE("(%p,%p)\n", iface, pCount);
 
-    if (!This->initialized) return WINCODEC_ERR_NOTINITIALIZED;
+    if (!pCount) return E_INVALIDARG;
 
-    *pCount = This->gif->ImageCount;
+    EnterCriticalSection(&This->lock);
+    *pCount = This->gif ? This->gif->ImageCount : 0;
+    LeaveCriticalSection(&This->lock);
 
-    TRACE("<- %u\n", *pCount);
+    TRACE("(%p) <-- %d\n", iface, *pCount);
 
     return S_OK;
 }