本文整理匯總了C++中DrawTarget::GetOpaqueRect方法的典型用法代碼示例。如果您正苦於以下問題：C++ DrawTarget::GetOpaqueRect方法的具體用法？C++ DrawTarget::GetOpaqueRect怎麽用？C++ DrawTarget::GetOpaqueRect使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類DrawTarget的用法示例。
在下文中一共展示了DrawTarget::GetOpaqueRect方法的1個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的C++代碼示例。
示例1: surfRect
void
gfxContext::PushGroupAndCopyBackground(gfxContentType content)
{
IntRect clipExtents;
if (mDT->GetFormat() != SurfaceFormat::B8G8R8X8) {
gfxRect clipRect = GetRoundOutDeviceClipExtents(this);
clipExtents = IntRect(clipRect.x, clipRect.y, clipRect.width, clipRect.height);
}
if ((mDT->GetFormat() == SurfaceFormat::B8G8R8X8 ||
mDT->GetOpaqueRect().Contains(clipExtents)) &&
!mDT->GetUserData(&sDontUseAsSourceKey)) {
DrawTarget *oldDT = mDT;
RefPtr<SourceSurface> source = mDT->Snapshot();
Point oldDeviceOffset = CurrentState().deviceOffset;
PushNewDT(gfxContentType::COLOR);
if (oldDT == mDT) {
// Creating new DT failed.
return;
}
Point offset = CurrentState().deviceOffset - oldDeviceOffset;
Rect surfRect(0, 0, Float(mDT->GetSize().width), Float(mDT->GetSize().height));
Rect sourceRect = surfRect + offset;
mDT->SetTransform(Matrix());
// XXX: It's really sad that we have to do this (for performance).
// Once DrawTarget gets a PushLayer API we can implement this within
// DrawTargetTiled.
if (source->GetType() == SurfaceType::TILED) {
SnapshotTiled *sourceTiled = static_cast<SnapshotTiled*>(source.get());
for (uint32_t i = 0; i < sourceTiled->mSnapshots.size(); i++) {
Rect tileSourceRect = sourceRect.Intersect(Rect(sourceTiled->mOrigins[i].x,
sourceTiled->mOrigins[i].y,
sourceTiled->mSnapshots[i]->GetSize().width,
sourceTiled->mSnapshots[i]->GetSize().height));
if (tileSourceRect.IsEmpty()) {
continue;
}
Rect tileDestRect = tileSourceRect - offset;
tileSourceRect -= sourceTiled->mOrigins[i];
mDT->DrawSurface(sourceTiled->mSnapshots[i], tileDestRect, tileSourceRect);
}
} else {
mDT->DrawSurface(source, surfRect, sourceRect);
}
mDT->SetOpaqueRect(oldDT->GetOpaqueRect());
PushClipsToDT(mDT);
mDT->SetTransform(GetDTTransform());
return;
}
PushGroup(content);
}