Layer.h revision 3e9999bd866fac71c72e6b484a9836c87c328a08
1/* 2 * Copyright (C) 2010 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#pragma once 18 19#include <utils/RefBase.h> 20#include <GpuMemoryTracker.h> 21 22#include <SkPaint.h> 23#include <SkBlendMode.h> 24 25#include "Matrix.h" 26 27namespace android { 28namespace uirenderer { 29 30/////////////////////////////////////////////////////////////////////////////// 31// Layers 32/////////////////////////////////////////////////////////////////////////////// 33 34class RenderState; 35 36/** 37 * A layer has dimensions and is backed by a backend specific texture or framebuffer. 38 */ 39class Layer : public VirtualLightRefBase, GpuMemoryTracker { 40public: 41 enum class Api { 42 OpenGL = 0, 43 Vulkan = 1, 44 }; 45 46 Api getApi() const { 47 return mApi; 48 } 49 50 ~Layer(); 51 52 virtual uint32_t getWidth() const = 0; 53 54 virtual uint32_t getHeight() const = 0; 55 56 virtual void setSize(uint32_t width, uint32_t height) = 0; 57 58 virtual void setBlend(bool blend) = 0; 59 60 virtual bool isBlend() const = 0; 61 62 inline void setForceFilter(bool forceFilter) { 63 this->forceFilter = forceFilter; 64 } 65 66 inline bool getForceFilter() const { 67 return forceFilter; 68 } 69 70 inline void setAlpha(int alpha) { 71 this->alpha = alpha; 72 } 73 74 inline void setAlpha(int alpha, SkBlendMode mode) { 75 this->alpha = alpha; 76 this->mode = mode; 77 } 78 79 inline int getAlpha() const { 80 return alpha; 81 } 82 83 inline SkBlendMode getMode() const { 84 return mode; 85 } 86 87 inline SkColorFilter* getColorFilter() const { 88 return colorFilter; 89 } 90 91 void setColorFilter(SkColorFilter* filter); 92 93 inline mat4& getTexTransform() { 94 return texTransform; 95 } 96 97 inline mat4& getTransform() { 98 return transform; 99 } 100 101 /** 102 * Posts a decStrong call to the appropriate thread. 103 * Thread-safe. 104 */ 105 void postDecStrong(); 106 107protected: 108 Layer(RenderState& renderState, Api api, SkColorFilter* colorFilter, int alpha, 109 SkBlendMode mode); 110 111 RenderState& mRenderState; 112 113private: 114 Api mApi; 115 116 /** 117 * Color filter used to draw this layer. Optional. 118 */ 119 SkColorFilter* colorFilter; 120 121 /** 122 * Indicates raster data backing the layer is scaled, requiring filtration. 123 */ 124 bool forceFilter = false; 125 126 /** 127 * Opacity of the layer. 128 */ 129 int alpha; 130 131 /** 132 * Blending mode of the layer. 133 */ 134 SkBlendMode mode; 135 136 /** 137 * Optional texture coordinates transform. 138 */ 139 mat4 texTransform; 140 141 /** 142 * Optional transform. 143 */ 144 mat4 transform; 145 146}; // struct Layer 147 148}; // namespace uirenderer 149}; // namespace android 150