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 25 namespace android { 26 namespace uirenderer { 27 28 class Caches; 29 class UvMapper; 30 class Layer; 31 32 /** 33 * Represents an OpenGL texture. 34 */ 35 class Texture : public GpuMemoryTracker { 36 public: Texture(Caches & caches)37 Texture(Caches& caches) 38 : GpuMemoryTracker(GpuObjectType::Texture) 39 , mCaches(caches) 40 { } 41 ~Texture()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 */ resize(uint32_t width,uint32_t height,GLint format)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 id()96 GLuint id() const { 97 return mId; 98 } 99 width()100 uint32_t width() const { 101 return mWidth; 102 } 103 height()104 uint32_t height() const { 105 return mHeight; 106 } 107 format()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; 143 144 private: 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 void resetCachedParams(); 153 154 GLuint mId = 0; 155 uint32_t mWidth = 0; 156 uint32_t mHeight = 0; 157 GLint mFormat = 0; 158 159 /* See GLES spec section 3.8.14 160 * "In the initial state, the value assigned to TEXTURE_MIN_FILTER is 161 * NEAREST_MIPMAP_LINEAR and the value for TEXTURE_MAG_FILTER is LINEAR. 162 * s, t, and r wrap modes are all set to REPEAT." 163 */ 164 GLenum mWrapS = GL_REPEAT; 165 GLenum mWrapT = GL_REPEAT; 166 GLenum mMinFilter = GL_NEAREST_MIPMAP_LINEAR; 167 GLenum mMagFilter = GL_LINEAR; 168 169 Caches& mCaches; 170 }; // struct Texture 171 172 class AutoTexture { 173 public: AutoTexture(Texture * texture)174 AutoTexture(Texture* texture) 175 : texture(texture) {} ~AutoTexture()176 ~AutoTexture() { 177 if (texture && texture->cleanup) { 178 texture->deleteTexture(); 179 delete texture; 180 } 181 } 182 183 Texture* const texture; 184 }; // class AutoTexture 185 186 }; // namespace uirenderer 187 }; // namespace android 188 189 #endif // ANDROID_HWUI_TEXTURE_H 190