libs/hwui/pipeline/skia/LayerDrawable.h

/*
 * Copyright (C) 2016 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#pragma once

#include "DeferredLayerUpdater.h"

#include <SkCanvas.h>
#include <SkDrawable.h>

namespace android {
namespace uirenderer {
namespace skiapipeline {

/*
 * Draws a layer backed by an OpenGL texture into a SkCanvas.
 */
class LayerDrawable : public SkDrawable {
public:
    explicit LayerDrawable(DeferredLayerUpdater* layerUpdater) : mLayerUpdater(layerUpdater) {}

    static bool DrawLayer(GrRecordingContext* context,
    					  SkCanvas* canvas,
    					  Layer* layer,
    					  const SkRect* srcRect,
    					  const SkRect* dstRect,
    					  bool useLayerTransform);

protected:
    virtual SkRect onGetBounds() override {
        return SkRect::MakeWH(mLayerUpdater->getWidth(), mLayerUpdater->getHeight());
    }
    virtual void onDraw(SkCanvas* canvas) override;

private:
    sp<DeferredLayerUpdater> mLayerUpdater;
};

}  // namespace skiapipeline
}  // namespace uirenderer
}  // namespace android