windowscodecs: Implement QueryCapability for BMP decoder.

dlls/windowscodecs/bmpdecode.c

diff --git a/dlls/windowscodecs/bmpdecode.c b/dlls/windowscodecs/bmpdecode.c
index a6b7577..b81987c6 100644
--- a/dlls/windowscodecs/bmpdecode.c
+++ b/dlls/windowscodecs/bmpdecode.c
@@ -329,9 +329,14 @@
 {
     HRESULT hr;
     ULONG bytestoread, bytesread;
+    LARGE_INTEGER seek;
 
     if (This->initialized) return WINCODEC_ERR_WRONGSTATE;
 
+    seek.QuadPart = 0;
+    hr = IStream_Seek(stream, seek, STREAM_SEEK_SET, NULL);
+    if (FAILED(hr)) return hr;
+
     hr = IStream_Read(stream, &This->bfh, sizeof(BITMAPFILEHEADER), &bytesread);
     if (FAILED(hr)) return hr;
     if (bytesread != sizeof(BITMAPFILEHEADER) ||
@@ -483,8 +488,18 @@
 static HRESULT WINAPI BmpDecoder_QueryCapability(IWICBitmapDecoder *iface, IStream *pIStream,
     DWORD *pdwCapability)
 {
-    FIXME("(%p,%p,%p): stub\n", iface, pIStream, pdwCapability);
-    return E_NOTIMPL;
+    HRESULT hr;
+    BmpDecoder *This = (BmpDecoder*)iface;
+
+    hr = BmpDecoder_ReadHeaders(This, pIStream);
+    if (FAILED(hr)) return hr;
+
+    if (This->read_data_func == BmpFrameDecode_ReadUnsupported)
+        *pdwCapability = 0;
+    else
+        *pdwCapability = WICBitmapDecoderCapabilityCanDecodeAllImages;
+
+    return S_OK;
 }
 
 static HRESULT WINAPI BmpDecoder_Initialize(IWICBitmapDecoder *iface, IStream *pIStream,

dlls/windowscodecs/tests/bmpformat.c

diff --git a/dlls/windowscodecs/tests/bmpformat.c b/dlls/windowscodecs/tests/bmpformat.c
index c266dda..fb6f491 100644
--- a/dlls/windowscodecs/tests/bmpformat.c
+++ b/dlls/windowscodecs/tests/bmpformat.c
@@ -157,7 +157,7 @@
 
             /* cannot querycapability after initialize */
             hr = IWICBitmapDecoder_QueryCapability(decoder, bmpstream, &capability);
-            todo_wine ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
+            ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
 
             hr = CoCreateInstance(&CLSID_WICBmpDecoder, NULL, CLSCTX_INPROC_SERVER,
                 &IID_IWICBitmapDecoder, (void**)&decoder2);
@@ -165,17 +165,17 @@
             if (SUCCEEDED(hr))
             {
                 hr = IWICBitmapDecoder_QueryCapability(decoder2, bmpstream, &capability);
-                todo_wine ok(hr == S_OK, "QueryCapability failed, hr=%x\n", hr);
-                todo_wine ok(capability == (WICBitmapDecoderCapabilityCanDecodeAllImages),
+                ok(hr == S_OK, "QueryCapability failed, hr=%x\n", hr);
+                ok(capability == (WICBitmapDecoderCapabilityCanDecodeAllImages),
                     "unexpected capabilities: %x\n", capability);
 
                 /* cannot initialize after querycapability */
                 hr = IWICBitmapDecoder_Initialize(decoder2, bmpstream, WICDecodeMetadataCacheOnLoad);
-                todo_wine ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
+                ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
 
                 /* cannot querycapability twice */
                 hr = IWICBitmapDecoder_QueryCapability(decoder2, bmpstream, &capability);
-                todo_wine ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
+                ok(hr == WINCODEC_ERR_WRONGSTATE, "expected WINCODEC_ERR_WRONGSTATE, hr=%x\n", hr);
             }
 
             IStream_Release(bmpstream);