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[widget] Properly test for and handle errors in target-surface creation and mapping.

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This commit is contained in:
Moonchild 2023-02-19 12:08:17 +01:00 • committed by roytam1
commit bca689b483
1 changed files with 18 additions and 11 deletions
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29
widget/windows/TaskbarPreview.cpp
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@ -355,32 +355,38 @@ TaskbarPreviewCallback::Done(nsISupports *aCanvas, bool aDrawBorder) {
}
RefPtr<gfxWindowsSurface> target = new gfxWindowsSurface(source->GetSize(),
gfx::SurfaceFormat::A8R8G8B8_UINT32);
if (!target) {
if (target->CairoStatus() != CAIRO_STATUS_SUCCESS) {
return NS_ERROR_FAILURE;
}
RefPtr<gfx::DataSourceSurface> srcSurface = source->GetDataSurface();
using DataSrcSurf = gfx::DataSourceSurface;
RefPtr<DataSrcSurf> srcSurface = source->GetDataSurface();
RefPtr<gfxImageSurface> imageSurface = target->GetAsImageSurface();
if (!srcSurface || !imageSurface) {
return NS_ERROR_FAILURE;
}
gfx::DataSourceSurface::MappedSurface sourceMap;
srcSurface->Map(gfx::DataSourceSurface::READ, &sourceMap);
mozilla::gfx::CopySurfaceDataToPackedArray(sourceMap.mData,
imageSurface->Data(),
srcSurface->GetSize(),
sourceMap.mStride,
BytesPerPixel(srcSurface->GetFormat()));
srcSurface->Unmap();
DataSrcSurf::ScopedMap const sourceMap(srcSurface, DataSrcSurf::READ);
if (sourceMap.IsMapped()) {
mozilla::gfx::CopySurfaceDataToPackedArray(sourceMap.GetData(),
imageSurface->Data(),
srcSurface->GetSize(),
sourceMap.GetStride(),
BytesPerPixel(srcSurface->GetFormat()));
} else if (source->GetSize().IsEmpty()) {
// A zero-size source-surface probably shouldn't happen, but is harmless
// here. Fall through.
} else {
return NS_ERROR_FAILURE;
}
HDC hDC = target->GetDC();
HBITMAP hBitmap = (HBITMAP)GetCurrentObject(hDC, OBJ_BITMAP);
DWORD flags = aDrawBorder ? DWM_SIT_DISPLAYFRAME : 0;
POINT pptClient = { 0, 0 };
HRESULT hr;
if (!mIsThumbnail) {
POINT pptClient = { 0, 0 };
hr = WinUtils::dwmSetIconicLivePreviewBitmapPtr(mPreview->PreviewWindow(),
hBitmap, &pptClient, flags);
} else {
@ -388,6 +394,7 @@ TaskbarPreviewCallback::Done(nsISupports *aCanvas, bool aDrawBorder) {
hBitmap, flags);
}
MOZ_ASSERT(SUCCEEDED(hr));
mozilla::Unused << hr;
return NS_OK;
}