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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef GFX_UPDATEIMAGEHELPER_H
#define GFX_UPDATEIMAGEHELPER_H
#include "mozilla/layers/CompositorTypes.h"
#include "mozilla/layers/ImageClient.h"
#include "mozilla/layers/TextureClient.h"
#include "mozilla/layers/TextureClientRecycleAllocator.h"
#include "mozilla/layers/TextureWrapperImage.h"
#include "mozilla/gfx/Types.h"
namespace mozilla {
namespace layers {
class UpdateImageHelper {
public:
UpdateImageHelper(ImageContainer* aImageContainer, ImageClient* aImageClient,
gfx::IntSize aImageSize, gfx::SurfaceFormat aFormat)
: mImageContainer(aImageContainer),
mImageClient(aImageClient),
mImageSize(aImageSize),
mIsLocked(false) {
mTexture = mImageClient->GetTextureClientRecycler()->CreateOrRecycle(
aFormat, mImageSize, BackendSelector::Content, TextureFlags::DEFAULT);
if (!mTexture) {
return;
}
mIsLocked = mTexture->Lock(OpenMode::OPEN_WRITE_ONLY);
if (!mIsLocked) {
return;
}
}
~UpdateImageHelper() {
if (mIsLocked) {
mTexture->Unlock();
mIsLocked = false;
}
}
already_AddRefed<gfx::DrawTarget> GetDrawTarget() {
RefPtr<gfx::DrawTarget> target;
if (mTexture) {
target = mTexture->BorrowDrawTarget();
}
return target.forget();
}
bool UpdateImage() {
if (!mTexture) {
return false;
}
if (mIsLocked) {
mTexture->Unlock();
mIsLocked = false;
}
RefPtr<TextureWrapperImage> image = new TextureWrapperImage(
mTexture, gfx::IntRect(gfx::IntPoint(0, 0), mImageSize));
mImageContainer->SetCurrentImageInTransaction(image);
return mImageClient->UpdateImage(mImageContainer, /* unused */ 0);
}
private:
RefPtr<ImageContainer> mImageContainer;
RefPtr<ImageClient> mImageClient;
gfx::IntSize mImageSize;
RefPtr<TextureClient> mTexture;
bool mIsLocked;
};
} // namespace layers
} // namespace mozilla
#endif // GFX_UPDATEIMAGEHELPER_H