зеркало из https://github.com/mozilla/gecko-dev.git
88 строки
2.4 KiB
C++
88 строки
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* 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 GFX_UPDATEIMAGEHELPER_H
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#define GFX_UPDATEIMAGEHELPER_H
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#include "Layers.h"
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#include "mozilla/layers/ImageClient.h"
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#include "mozilla/layers/TextureClient.h"
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#include "mozilla/layers/TextureClientRecycleAllocator.h"
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#include "mozilla/layers/TextureWrapperImage.h"
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#include "mozilla/gfx/Types.h"
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namespace mozilla {
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namespace layers {
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class UpdateImageHelper
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{
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public:
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UpdateImageHelper(ImageContainer* aImageContainer, ImageClient* aImageClient, gfx::IntSize aImageSize) :
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mImageContainer(aImageContainer),
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mImageClient(aImageClient),
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mImageSize(aImageSize),
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mIsLocked(false)
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{
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mTexture = mImageClient->GetTextureClientRecycler()->CreateOrRecycle(gfx::SurfaceFormat::B8G8R8A8,
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mImageSize,
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BackendSelector::Content,
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TextureFlags::DEFAULT);
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if (!mTexture) {
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return;
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}
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mIsLocked = mTexture->Lock(OpenMode::OPEN_WRITE_ONLY);
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if (!mIsLocked) {
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return;
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}
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}
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~UpdateImageHelper()
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{
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if (mIsLocked) {
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mTexture->Unlock();
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mIsLocked = false;
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}
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}
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already_AddRefed<gfx::DrawTarget> GetDrawTarget()
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{
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RefPtr<gfx::DrawTarget> target;
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if (mTexture) {
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target = mTexture->BorrowDrawTarget();
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}
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return target.forget();
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}
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bool UpdateImage()
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{
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if (!mTexture) {
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return false;
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}
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if (mIsLocked) {
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mTexture->Unlock();
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mIsLocked = false;
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}
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RefPtr<TextureWrapperImage> image = new TextureWrapperImage(mTexture,
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gfx::IntRect(gfx::IntPoint(0, 0), mImageSize));
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mImageContainer->SetCurrentImageInTransaction(image);
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return mImageClient->UpdateImage(mImageContainer, /* unused */0);
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}
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private:
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RefPtr<ImageContainer> mImageContainer;
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RefPtr<ImageClient> mImageClient;
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gfx::IntSize mImageSize;
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RefPtr<TextureClient> mTexture;
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bool mIsLocked;
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};
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} // namespace layers
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} // namespace mozilla
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#endif // GFX_UPDATEIMAGEHELPER_H
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