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_LAYER_H 18 #define ANDROID_HWUI_LAYER_H 19 20 #include <sys/types.h> 21 22 #include <GLES2/gl2.h> 23 24 #include <ui/Region.h> 25 26 #include <SkXfermode.h> 27 28 #include "Rect.h" 29 #include "SkiaColorFilter.h" 30 #include "Texture.h" 31 #include "Vertex.h" 32 33 namespace android { 34 namespace uirenderer { 35 36 /////////////////////////////////////////////////////////////////////////////// 37 // Layers 38 /////////////////////////////////////////////////////////////////////////////// 39 40 /** 41 * A layer has dimensions and is backed by an OpenGL texture or FBO. 42 */ 43 struct Layer { 44 Layer(const uint32_t layerWidth, const uint32_t layerHeight) { 45 mesh = NULL; 46 meshIndices = NULL; 47 meshElementCount = 0; 48 cacheable = true; 49 textureLayer = false; 50 renderTarget = GL_TEXTURE_2D; 51 texture.width = layerWidth; 52 texture.height = layerHeight; 53 colorFilter = NULL; 54 } 55 56 ~Layer() { 57 if (mesh) delete mesh; 58 if (meshIndices) delete meshIndices; 59 } 60 61 /** 62 * Sets this layer's region to a rectangle. Computes the appropriate 63 * texture coordinates. 64 */ 65 void setRegionAsRect() { 66 const android::Rect& bounds = region.getBounds(); 67 regionRect.set(bounds.leftTop().x, bounds.leftTop().y, 68 bounds.rightBottom().x, bounds.rightBottom().y); 69 70 const float texX = 1.0f / float(texture.width); 71 const float texY = 1.0f / float(texture.height); 72 const float height = layer.getHeight(); 73 texCoords.set( 74 regionRect.left * texX, (height - regionRect.top) * texY, 75 regionRect.right * texX, (height - regionRect.bottom) * texY); 76 77 regionRect.translate(layer.left, layer.top); 78 } 79 80 inline uint32_t getWidth() { 81 return texture.width; 82 } 83 84 inline uint32_t getHeight() { 85 return texture.height; 86 } 87 88 void setSize(uint32_t width, uint32_t height) { 89 texture.width = width; 90 texture.height = height; 91 } 92 93 inline void setBlend(bool blend) { 94 texture.blend = blend; 95 } 96 97 inline bool isBlend() { 98 return texture.blend; 99 } 100 101 inline void setAlpha(int alpha) { 102 this->alpha = alpha; 103 } 104 105 inline void setAlpha(int alpha, SkXfermode::Mode mode) { 106 this->alpha = alpha; 107 this->mode = mode; 108 } 109 110 inline int getAlpha() { 111 return alpha; 112 } 113 114 inline SkXfermode::Mode getMode() { 115 return mode; 116 } 117 118 inline void setEmpty(bool empty) { 119 this->empty = empty; 120 } 121 122 inline bool isEmpty() { 123 return empty; 124 } 125 126 inline void setFbo(GLuint fbo) { 127 this->fbo = fbo; 128 } 129 130 inline GLuint getFbo() { 131 return fbo; 132 } 133 134 inline GLuint* getTexturePointer() { 135 return &texture.id; 136 } 137 138 inline GLuint getTexture() { 139 return texture.id; 140 } 141 142 inline GLenum getRenderTarget() { 143 return renderTarget; 144 } 145 146 inline void setRenderTarget(GLenum renderTarget) { 147 this->renderTarget = renderTarget; 148 } 149 150 void setWrap(GLenum wrapS, GLenum wrapT, bool bindTexture = false, bool force = false) { 151 texture.setWrap(wrapS, wrapT, bindTexture, force, renderTarget); 152 } 153 154 void setFilter(GLenum min, GLenum mag, bool bindTexture = false, bool force = false) { 155 texture.setFilter(min, mag,bindTexture, force, renderTarget); 156 } 157 158 inline bool isCacheable() { 159 return cacheable; 160 } 161 162 inline void setCacheable(bool cacheable) { 163 this->cacheable = cacheable; 164 } 165 166 inline bool isTextureLayer() { 167 return textureLayer; 168 } 169 170 inline void setTextureLayer(bool textureLayer) { 171 this->textureLayer = textureLayer; 172 } 173 174 inline SkiaColorFilter* getColorFilter() { 175 return colorFilter; 176 } 177 178 inline void setColorFilter(SkiaColorFilter* filter) { 179 colorFilter = filter; 180 } 181 182 inline void bindTexture() { 183 glBindTexture(renderTarget, texture.id); 184 } 185 186 inline void generateTexture() { 187 glGenTextures(1, &texture.id); 188 } 189 190 inline void deleteTexture() { 191 if (texture.id) glDeleteTextures(1, &texture.id); 192 } 193 194 inline void deleteFbo() { 195 if (fbo) glDeleteFramebuffers(1, &fbo); 196 } 197 198 inline void allocateTexture(GLenum format, GLenum storage) { 199 glTexImage2D(renderTarget, 0, format, getWidth(), getHeight(), 0, format, storage, NULL); 200 } 201 202 inline mat4& getTexTransform() { 203 return texTransform; 204 } 205 206 inline mat4& getTransform() { 207 return transform; 208 } 209 210 /** 211 * Bounds of the layer. 212 */ 213 Rect layer; 214 /** 215 * Texture coordinates of the layer. 216 */ 217 Rect texCoords; 218 219 /** 220 * Dirty region indicating what parts of the layer 221 * have been drawn. 222 */ 223 Region region; 224 /** 225 * If the region is a rectangle, coordinates of the 226 * region are stored here. 227 */ 228 Rect regionRect; 229 230 /** 231 * If the layer can be rendered as a mesh, this is non-null. 232 */ 233 TextureVertex* mesh; 234 uint16_t* meshIndices; 235 GLsizei meshElementCount; 236 237 private: 238 /** 239 * Name of the FBO used to render the layer. If the name is 0 240 * this layer is not backed by an FBO, but a simple texture. 241 */ 242 GLuint fbo; 243 244 /** 245 * Indicates whether this layer has been used already. 246 */ 247 bool empty; 248 249 /** 250 * The texture backing this layer. 251 */ 252 Texture texture; 253 254 /** 255 * If set to true (by default), the layer can be reused. 256 */ 257 bool cacheable; 258 259 /** 260 * When set to true, this layer must be treated as a texture 261 * layer. 262 */ 263 bool textureLayer; 264 265 /** 266 * Indicates the render target. 267 */ 268 GLenum renderTarget; 269 270 /** 271 * Color filter used to draw this layer. Optional. 272 */ 273 SkiaColorFilter* colorFilter; 274 275 /** 276 * Opacity of the layer. 277 */ 278 int alpha; 279 /** 280 * Blending mode of the layer. 281 */ 282 SkXfermode::Mode mode; 283 284 /** 285 * Optional texture coordinates transform. 286 */ 287 mat4 texTransform; 288 289 /** 290 * Optional transform. 291 */ 292 mat4 transform; 293 294 }; // struct Layer 295 296 }; // namespace uirenderer 297 }; // namespace android 298 299 #endif // ANDROID_HWUI_LAYER_H 300
