Texture.h revision 38e0c32852e3b9d8ca4a9d3791577f52536419cb
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#ifndef ANDROID_HWUI_TEXTURE_H 18#define ANDROID_HWUI_TEXTURE_H 19 20#include "GpuMemoryTracker.h" 21 22#include <GLES2/gl2.h> 23#include <SkBitmap.h> 24 25namespace android { 26namespace uirenderer { 27 28class Caches; 29class UvMapper; 30class Layer; 31 32/** 33 * Represents an OpenGL texture. 34 */ 35class Texture : public GpuMemoryTracker { 36public: 37 Texture(Caches& caches) 38 : GpuMemoryTracker(GpuObjectType::Texture) 39 , mCaches(caches) 40 { } 41 42 virtual ~Texture() { } 43 44 inline void setWrap(GLenum wrap, bool bindTexture = false, bool force = false, 45 GLenum renderTarget = GL_TEXTURE_2D) { 46 setWrapST(wrap, wrap, bindTexture, force, renderTarget); 47 } 48 49 virtual void setWrapST(GLenum wrapS, GLenum wrapT, bool bindTexture = false, 50 bool force = false, GLenum renderTarget = GL_TEXTURE_2D); 51 52 inline void setFilter(GLenum filter, bool bindTexture = false, bool force = false, 53 GLenum renderTarget = GL_TEXTURE_2D) { 54 setFilterMinMag(filter, filter, bindTexture, force, renderTarget); 55 } 56 57 virtual void setFilterMinMag(GLenum min, GLenum mag, bool bindTexture = false, 58 bool force = false, GLenum renderTarget = GL_TEXTURE_2D); 59 60 /** 61 * Convenience method to call glDeleteTextures() on this texture's id. 62 */ 63 void deleteTexture(); 64 65 /** 66 * Sets the width, height, and format of the texture along with allocating 67 * the texture ID. Does nothing if the width, height, and format are already 68 * the requested values. 69 * 70 * The image data is undefined after calling this. 71 */ 72 void resize(uint32_t width, uint32_t height, GLint format) { 73 upload(format, width, height, format, GL_UNSIGNED_BYTE, nullptr); 74 } 75 76 /** 77 * Updates this Texture with the contents of the provided SkBitmap, 78 * also setting the appropriate width, height, and format. It is not necessary 79 * to call resize() prior to this. 80 * 81 * Note this does not set the generation from the SkBitmap. 82 */ 83 void upload(const SkBitmap& source); 84 85 /** 86 * Basically glTexImage2D/glTexSubImage2D. 87 */ 88 void upload(GLint internalformat, uint32_t width, uint32_t height, 89 GLenum format, GLenum type, const void* pixels); 90 91 /** 92 * Wraps an existing texture. 93 */ 94 void wrap(GLuint id, uint32_t width, uint32_t height, GLint format); 95 96 GLuint id() const { 97 return mId; 98 } 99 100 uint32_t width() const { 101 return mWidth; 102 } 103 104 uint32_t height() const { 105 return mHeight; 106 } 107 108 GLint format() const { 109 return mFormat; 110 } 111 112 /** 113 * Generation of the backing bitmap, 114 */ 115 uint32_t generation = 0; 116 /** 117 * Indicates whether the texture requires blending. 118 */ 119 bool blend = false; 120 /** 121 * Indicates whether this texture should be cleaned up after use. 122 */ 123 bool cleanup = false; 124 /** 125 * Optional, size of the original bitmap. 126 */ 127 uint32_t bitmapSize = 0; 128 /** 129 * Indicates whether this texture will use trilinear filtering. 130 */ 131 bool mipMap = false; 132 133 /** 134 * Optional, pointer to a texture coordinates mapper. 135 */ 136 const UvMapper* uvMapper = nullptr; 137 138 /** 139 * Whether or not the Texture is marked in use and thus not evictable for 140 * the current frame. This is reset at the start of a new frame. 141 */ 142 void* isInUse = nullptr; 143 144private: 145 // TODO: Temporarily grant private access to Layer, remove once 146 // Layer can be de-tangled from being a dual-purpose render target 147 // and external texture wrapper 148 friend class Layer; 149 150 // Returns true if the size changed, false if it was the same 151 bool updateSize(uint32_t width, uint32_t height, GLint format); 152 153 GLuint mId = 0; 154 uint32_t mWidth = 0; 155 uint32_t mHeight = 0; 156 GLint mFormat = 0; 157 158 /** 159 * Last wrap modes set on this texture. 160 */ 161 GLenum mWrapS = GL_CLAMP_TO_EDGE; 162 GLenum mWrapT = GL_CLAMP_TO_EDGE; 163 164 /** 165 * Last filters set on this texture. 166 */ 167 GLenum mMinFilter = GL_NEAREST; 168 GLenum mMagFilter = GL_NEAREST; 169 170 bool mFirstFilter = true; 171 bool mFirstWrap = true; 172 173 Caches& mCaches; 174}; // struct Texture 175 176class AutoTexture { 177public: 178 AutoTexture(Texture* texture) 179 : texture(texture) {} 180 ~AutoTexture() { 181 if (texture && texture->cleanup) { 182 texture->deleteTexture(); 183 delete texture; 184 } 185 } 186 187 Texture* const texture; 188}; // class AutoTexture 189 190}; // namespace uirenderer 191}; // namespace android 192 193#endif // ANDROID_HWUI_TEXTURE_H 194