зеркало из https://github.com/mozilla/gecko-dev.git
99 строки
2.7 KiB
C++
99 строки
2.7 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_RendererScreenshotGrabber_h
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#define mozilla_layers_RendererScreenshotGrabber_h
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#include "mozilla/TimeStamp.h"
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#include "mozilla/UniquePtr.h"
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#include "mozilla/gfx/Point.h"
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#include "mozilla/layers/ProfilerScreenshots.h"
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#include "nsTArray.h"
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namespace mozilla {
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namespace wr {
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/**
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* Used by |RendererOGL| to grab screenshots from WebRender and submit them to
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* the Gecko profiler.
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*
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* If the profiler is not running or the screenshots feature is disabled, no
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* work will be done.
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*/
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class RendererScreenshotGrabber final {
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public:
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RendererScreenshotGrabber();
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/**
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* Grab a screenshot from WebRender if we are profiling and screenshots are
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* enabled.
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*
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* The captured screenshot will not be mapped until the second call to
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* |MaybeProcessQueue| after this call to |MaybeGrabScreenshot|.
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*/
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void MaybeGrabScreenshot(Renderer* aRenderer,
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const gfx::IntSize& aWindowSize);
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/**
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* Process the screenshots pending in the queue if we are profiling and
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* screenshots are enabled.
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*/
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void MaybeProcessQueue(Renderer* aRenderer);
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private:
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/**
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* Drop all our allocated memory when we are no longer profiling.
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*
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* This will also instruct WebRender to drop all its Gecko profiler
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* associated memory.
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*/
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void Destroy(Renderer* aRenderer);
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/**
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* Actually grab a screenshot from WebRender.
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*/
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void GrabScreenshot(Renderer* aRenderer, const gfx::IntSize& aWindowSize);
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/**
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* Process the screenshots pending in the queue.
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*/
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void ProcessQueue(Renderer* aRenderer);
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struct QueueItem {
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mozilla::TimeStamp mTimeStamp;
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AsyncScreenshotHandle mHandle;
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gfx::IntSize mScreenshotSize;
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gfx::IntSize mWindowSize;
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uintptr_t mWindowIdentifier;
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};
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/**
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* The maximum size for screenshots, as dictated by
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* |ProfilerScrenshots::ScreenshotSize|.
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*/
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gfx::IntSize mMaxScreenshotSize;
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/**
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* The queue of screenshots waiting to be processed and submitted.
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*/
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nsTArray<QueueItem> mQueue;
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/**
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* The queue item for the current frame. This will be inserted into the queue
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* after a call to |MaybeProcessQueue| so it will be not be processed until
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* the next frame.
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*/
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Maybe<QueueItem> mCurrentFrameQueueItem;
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/**
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* Our handle to the profiler screenshots object.
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*/
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UniquePtr<mozilla::layers::ProfilerScreenshots> mProfilerScreenshots;
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};
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} // namespace wr
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} // namespace mozilla
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#endif // mozilla_layers_RendererScreenshotGrabber_h
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