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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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This commit is contained in:
Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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84
widget/CompositorWidget.cpp Normal file
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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "CompositorWidget.h"
#include "GLConsts.h"
#include "nsBaseWidget.h"
#include "VsyncDispatcher.h"
namespace mozilla {
namespace widget {
CompositorWidget::~CompositorWidget()
{
}
already_AddRefed<gfx::DrawTarget>
CompositorWidget::StartRemoteDrawing()
{
return nullptr;
}
void
CompositorWidget::CleanupRemoteDrawing()
{
mLastBackBuffer = nullptr;
}
already_AddRefed<gfx::DrawTarget>
CompositorWidget::GetBackBufferDrawTarget(gfx::DrawTarget* aScreenTarget,
const LayoutDeviceIntRect& aRect,
const LayoutDeviceIntRect& aClearRect)
{
MOZ_ASSERT(aScreenTarget);
gfx::SurfaceFormat format =
aScreenTarget->GetFormat() == gfx::SurfaceFormat::B8G8R8X8 ? gfx::SurfaceFormat::B8G8R8X8 : gfx::SurfaceFormat::B8G8R8A8;
gfx::IntSize size = aRect.ToUnknownRect().Size();
gfx::IntSize clientSize(GetClientSize().ToUnknownSize());
RefPtr<gfx::DrawTarget> target;
// Re-use back buffer if possible
if (mLastBackBuffer &&
mLastBackBuffer->GetBackendType() == aScreenTarget->GetBackendType() &&
mLastBackBuffer->GetFormat() == format &&
size <= mLastBackBuffer->GetSize() &&
mLastBackBuffer->GetSize() <= clientSize) {
target = mLastBackBuffer;
target->SetTransform(gfx::Matrix());
if (!aClearRect.IsEmpty()) {
gfx::IntRect clearRect = aClearRect.ToUnknownRect() - aRect.ToUnknownRect().TopLeft();
target->ClearRect(gfx::Rect(clearRect.x, clearRect.y, clearRect.width, clearRect.height));
}
} else {
target = aScreenTarget->CreateSimilarDrawTarget(size, format);
mLastBackBuffer = target;
}
return target.forget();
}
already_AddRefed<gfx::SourceSurface>
CompositorWidget::EndBackBufferDrawing()
{
RefPtr<gfx::SourceSurface> surface = mLastBackBuffer ? mLastBackBuffer->Snapshot() : nullptr;
return surface.forget();
}
uint32_t
CompositorWidget::GetGLFrameBufferFormat()
{
return LOCAL_GL_RGBA;
}
RefPtr<VsyncObserver>
CompositorWidget::GetVsyncObserver() const
{
// This should only used when the widget is in the GPU process, and should be
// implemented by IPDL-enabled CompositorWidgets.
// GPU process does not have a CompositorVsyncDispatcher.
MOZ_ASSERT_UNREACHABLE("Must be implemented by derived class");
return nullptr;
}
} // namespace widget
} // namespace mozilla