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 <GLES2/gl2.h> 21 22 namespace android { 23 namespace uirenderer { 24 25 /** 26 * Represents an OpenGL texture. 27 */ 28 struct Texture { TextureTexture29 Texture() { 30 cleanup = false; 31 bitmapSize = 0; 32 33 wrapS = GL_CLAMP_TO_EDGE; 34 wrapT = GL_CLAMP_TO_EDGE; 35 36 minFilter = GL_NEAREST; 37 magFilter = GL_NEAREST; 38 39 firstFilter = true; 40 firstWrap = true; 41 } 42 43 void setWrap(GLenum wrapS, GLenum wrapT, bool bindTexture = false, bool force = false, 44 GLenum renderTarget = GL_TEXTURE_2D) { 45 46 if (firstWrap || force || wrapS != this->wrapS || wrapT != this->wrapT) { 47 firstWrap = true; 48 49 this->wrapS = wrapS; 50 this->wrapT = wrapT; 51 52 if (bindTexture) { 53 glBindTexture(renderTarget, id); 54 } 55 56 glTexParameteri(renderTarget, GL_TEXTURE_WRAP_S, wrapS); 57 glTexParameteri(renderTarget, GL_TEXTURE_WRAP_T, wrapT); 58 } 59 } 60 61 void setFilter(GLenum min, GLenum mag, bool bindTexture = false, bool force = false, 62 GLenum renderTarget = GL_TEXTURE_2D) { 63 64 if (firstFilter || force || min != minFilter || mag != magFilter) { 65 firstFilter = false; 66 67 minFilter = min; 68 magFilter = mag; 69 70 if (bindTexture) { 71 glBindTexture(renderTarget, id); 72 } 73 74 glTexParameteri(renderTarget, GL_TEXTURE_MIN_FILTER, min); 75 glTexParameteri(renderTarget, GL_TEXTURE_MAG_FILTER, mag); 76 } 77 } 78 79 /** 80 * Name of the texture. 81 */ 82 GLuint id; 83 /** 84 * Generation of the backing bitmap, 85 */ 86 uint32_t generation; 87 /** 88 * Indicates whether the texture requires blending. 89 */ 90 bool blend; 91 /** 92 * Width of the backing bitmap. 93 */ 94 uint32_t width; 95 /** 96 * Height of the backing bitmap. 97 */ 98 uint32_t height; 99 /** 100 * Indicates whether this texture should be cleaned up after use. 101 */ 102 bool cleanup; 103 /** 104 * Optional, size of the original bitmap. 105 */ 106 uint32_t bitmapSize; 107 108 /** 109 * Last wrap modes set on this texture. Defaults to GL_CLAMP_TO_EDGE. 110 */ 111 GLenum wrapS; 112 GLenum wrapT; 113 114 /** 115 * Last filters set on this texture. Defaults to GL_NEAREST. 116 */ 117 GLenum minFilter; 118 GLenum magFilter; 119 120 private: 121 bool firstFilter; 122 bool firstWrap; 123 }; // struct Texture 124 125 class AutoTexture { 126 public: AutoTexture(const Texture * texture)127 AutoTexture(const Texture* texture): mTexture(texture) { } ~AutoTexture()128 ~AutoTexture() { 129 if (mTexture && mTexture->cleanup) { 130 glDeleteTextures(1, &mTexture->id); 131 delete mTexture; 132 } 133 } 134 135 private: 136 const Texture* mTexture; 137 }; // class AutoTexture 138 139 }; // namespace uirenderer 140 }; // namespace android 141 142 #endif // ANDROID_HWUI_TEXTURE_H 143