本文整理匯總了C++中DrawTarget::IsTiledDrawTarget方法的典型用法代碼示例。如果您正苦於以下問題：C++ DrawTarget::IsTiledDrawTarget方法的具體用法？C++ DrawTarget::IsTiledDrawTarget怎麽用？C++ DrawTarget::IsTiledDrawTarget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::IsTiledDrawTarget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:
CGContextRef
gfxQuartzNativeDrawing::BeginNativeDrawing()
{
NS_ASSERTION(!mCGContext, "BeginNativeDrawing called when drawing already in progress");
DrawTarget *dt = mDrawTarget;
if (dt->IsDualDrawTarget() || dt->IsTiledDrawTarget() ||
dt->GetBackendType() != BackendType::SKIA || dt->IsRecording()) {
// We need a DrawTarget that we can get a CGContextRef from:
Matrix transform = dt->GetTransform();
mNativeRect = transform.TransformBounds(mNativeRect);
mNativeRect.RoundOut();
if (mNativeRect.IsEmpty()) {
return nullptr;
}
mTempDrawTarget =
Factory::CreateDrawTarget(BackendType::SKIA,
IntSize::Truncate(mNativeRect.width, mNativeRect.height),
SurfaceFormat::B8G8R8A8);
if (!mTempDrawTarget) {
return nullptr;
}
transform.PostTranslate(-mNativeRect.x, -mNativeRect.y);
mTempDrawTarget->SetTransform(transform);
dt = mTempDrawTarget;
} else {
// Clip the DT in case BorrowedCGContext needs to create a new layer.
// This prevents it from creating a new layer the size of the window.
// But make sure that this clip is device pixel aligned.
Matrix transform = dt->GetTransform();
Rect deviceRect = transform.TransformBounds(mNativeRect);
deviceRect.RoundOut();
mNativeRect = transform.Inverse().TransformBounds(deviceRect);
mDrawTarget->PushClipRect(mNativeRect);
}
MOZ_ASSERT(dt->GetBackendType() == BackendType::SKIA);
mCGContext = mBorrowedContext.Init(dt);
if (NS_WARN_IF(!mCGContext)) {
// Failed borrowing CG context, so we need to clean up.
if (!mTempDrawTarget) {
mDrawTarget->PopClip();
}
return nullptr;
}
return mCGContext;
}