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/*
* Copyright (C) 2010 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 <GpuMemoryTracker.h>
#include <utils/RefBase.h>
#include <SkBlendMode.h>
#include <SkPaint.h>
#include "Matrix.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Layers
///////////////////////////////////////////////////////////////////////////////
class RenderState;
/**
* A layer has dimensions and is backed by a backend specific texture or framebuffer.
*/
class Layer : public VirtualLightRefBase, GpuMemoryTracker {
public:
enum class Api {
OpenGL = 0,
Vulkan = 1,
};
Api getApi() const { return mApi; }
~Layer();
virtual uint32_t getWidth() const = 0;
virtual uint32_t getHeight() const = 0;
virtual void setSize(uint32_t width, uint32_t height) = 0;
virtual void setBlend(bool blend) = 0;
virtual bool isBlend() const = 0;
inline void setForceFilter(bool forceFilter) { this->forceFilter = forceFilter; }
inline bool getForceFilter() const { return forceFilter; }
inline void setAlpha(int alpha) { this->alpha = alpha; }
inline void setAlpha(int alpha, SkBlendMode mode) {
this->alpha = alpha;
this->mode = mode;
}
inline int getAlpha() const { return alpha; }
inline SkBlendMode getMode() const { return mode; }
inline SkColorFilter* getColorFilter() const { return colorFilter; }
void setColorFilter(SkColorFilter* filter);
inline mat4& getTexTransform() { return texTransform; }
inline mat4& getTransform() { return transform; }
/**
* Posts a decStrong call to the appropriate thread.
* Thread-safe.
*/
void postDecStrong();
protected:
Layer(RenderState& renderState, Api api, SkColorFilter* colorFilter, int alpha,
SkBlendMode mode);
RenderState& mRenderState;
private:
Api mApi;
/**
* Color filter used to draw this layer. Optional.
*/
SkColorFilter* colorFilter;
/**
* Indicates raster data backing the layer is scaled, requiring filtration.
*/
bool forceFilter = false;
/**
* Opacity of the layer.
*/
int alpha;
/**
* Blending mode of the layer.
*/
SkBlendMode mode;
/**
* Optional texture coordinates transform.
*/
mat4 texTransform;
/**
* Optional transform.
*/
mat4 transform;
}; // struct Layer
}; // namespace uirenderer
}; // namespace android