Layer.h revision 97dc9172b0e58979c63de0dedbab656399a62281
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 33namespace android { 34namespace uirenderer { 35 36/////////////////////////////////////////////////////////////////////////////// 37// Layers 38/////////////////////////////////////////////////////////////////////////////// 39 40// Forward declarations 41class OpenGLRenderer; 42class DisplayList; 43 44/** 45 * A layer has dimensions and is backed by an OpenGL texture or FBO. 46 */ 47struct Layer { 48 Layer(const uint32_t layerWidth, const uint32_t layerHeight); 49 ~Layer(); 50 51 void freeResourcesLocked(); 52 53 /** 54 * Sets this layer's region to a rectangle. Computes the appropriate 55 * texture coordinates. 56 */ 57 void setRegionAsRect() { 58 const android::Rect& bounds = region.getBounds(); 59 regionRect.set(bounds.leftTop().x, bounds.leftTop().y, 60 bounds.rightBottom().x, bounds.rightBottom().y); 61 62 const float texX = 1.0f / float(texture.width); 63 const float texY = 1.0f / float(texture.height); 64 const float height = layer.getHeight(); 65 texCoords.set( 66 regionRect.left * texX, (height - regionRect.top) * texY, 67 regionRect.right * texX, (height - regionRect.bottom) * texY); 68 69 regionRect.translate(layer.left, layer.top); 70 } 71 72 void updateDeferred(OpenGLRenderer* renderer, DisplayList* displayList, 73 int left, int top, int right, int bottom) { 74 this->renderer = renderer; 75 this->displayList = displayList; 76 const Rect r(left, top, right, bottom); 77 dirtyRect.unionWith(r); 78 deferredUpdateScheduled = true; 79 } 80 81 inline uint32_t getWidth() { 82 return texture.width; 83 } 84 85 inline uint32_t getHeight() { 86 return texture.height; 87 } 88 89 void setSize(uint32_t width, uint32_t height) { 90 texture.width = width; 91 texture.height = height; 92 } 93 94 ANDROID_API void setPaint(SkPaint* paint); 95 96 inline void setBlend(bool blend) { 97 texture.blend = blend; 98 } 99 100 inline bool isBlend() { 101 return texture.blend; 102 } 103 104 inline void setAlpha(int alpha) { 105 this->alpha = alpha; 106 } 107 108 inline void setAlpha(int alpha, SkXfermode::Mode mode) { 109 this->alpha = alpha; 110 this->mode = mode; 111 } 112 113 inline int getAlpha() { 114 return alpha; 115 } 116 117 inline SkXfermode::Mode getMode() { 118 return mode; 119 } 120 121 inline void setEmpty(bool empty) { 122 this->empty = empty; 123 } 124 125 inline bool isEmpty() { 126 return empty; 127 } 128 129 inline void setFbo(GLuint fbo) { 130 this->fbo = fbo; 131 } 132 133 inline GLuint getFbo() { 134 return fbo; 135 } 136 137 inline GLuint* getTexturePointer() { 138 return &texture.id; 139 } 140 141 inline GLuint getTexture() { 142 return texture.id; 143 } 144 145 inline GLenum getRenderTarget() { 146 return renderTarget; 147 } 148 149 inline void setRenderTarget(GLenum renderTarget) { 150 this->renderTarget = renderTarget; 151 } 152 153 void setWrap(GLenum wrap, bool bindTexture = false, bool force = false) { 154 texture.setWrap(wrap, bindTexture, force, renderTarget); 155 } 156 157 void setFilter(GLenum filter, bool bindTexture = false, bool force = false) { 158 texture.setFilter(filter, bindTexture, force, renderTarget); 159 } 160 161 inline bool isCacheable() { 162 return cacheable; 163 } 164 165 inline void setCacheable(bool cacheable) { 166 this->cacheable = cacheable; 167 } 168 169 inline bool isTextureLayer() { 170 return textureLayer; 171 } 172 173 inline void setTextureLayer(bool textureLayer) { 174 this->textureLayer = textureLayer; 175 } 176 177 inline SkiaColorFilter* getColorFilter() { 178 return colorFilter; 179 } 180 181 ANDROID_API void setColorFilter(SkiaColorFilter* filter); 182 183 inline void bindTexture() { 184 glBindTexture(renderTarget, texture.id); 185 } 186 187 inline void generateTexture() { 188 glGenTextures(1, &texture.id); 189 } 190 191 inline void deleteTexture() { 192 if (texture.id) glDeleteTextures(1, &texture.id); 193 } 194 195 inline void deleteFbo() { 196 if (fbo) glDeleteFramebuffers(1, &fbo); 197 } 198 199 inline void allocateTexture(GLenum format, GLenum storage) { 200 glTexImage2D(renderTarget, 0, format, getWidth(), getHeight(), 0, format, storage, NULL); 201 } 202 203 inline mat4& getTexTransform() { 204 return texTransform; 205 } 206 207 inline mat4& getTransform() { 208 return transform; 209 } 210 211 /** 212 * Bounds of the layer. 213 */ 214 Rect layer; 215 /** 216 * Texture coordinates of the layer. 217 */ 218 Rect texCoords; 219 220 /** 221 * Dirty region indicating what parts of the layer 222 * have been drawn. 223 */ 224 Region region; 225 /** 226 * If the region is a rectangle, coordinates of the 227 * region are stored here. 228 */ 229 Rect regionRect; 230 231 /** 232 * If the layer can be rendered as a mesh, this is non-null. 233 */ 234 TextureVertex* mesh; 235 uint16_t* meshIndices; 236 GLsizei meshElementCount; 237 238 /** 239 * Used for deferred updates. 240 */ 241 bool deferredUpdateScheduled; 242 OpenGLRenderer* renderer; 243 DisplayList* displayList; 244 Rect dirtyRect; 245 246private: 247 /** 248 * Name of the FBO used to render the layer. If the name is 0 249 * this layer is not backed by an FBO, but a simple texture. 250 */ 251 GLuint fbo; 252 253 /** 254 * Indicates whether this layer has been used already. 255 */ 256 bool empty; 257 258 /** 259 * The texture backing this layer. 260 */ 261 Texture texture; 262 263 /** 264 * If set to true (by default), the layer can be reused. 265 */ 266 bool cacheable; 267 268 /** 269 * When set to true, this layer must be treated as a texture 270 * layer. 271 */ 272 bool textureLayer; 273 274 /** 275 * Indicates the render target. 276 */ 277 GLenum renderTarget; 278 279 /** 280 * Color filter used to draw this layer. Optional. 281 */ 282 SkiaColorFilter* colorFilter; 283 284 /** 285 * Opacity of the layer. 286 */ 287 int alpha; 288 /** 289 * Blending mode of the layer. 290 */ 291 SkXfermode::Mode mode; 292 293 /** 294 * Optional texture coordinates transform. 295 */ 296 mat4 texTransform; 297 298 /** 299 * Optional transform. 300 */ 301 mat4 transform; 302 303}; // struct Layer 304 305}; // namespace uirenderer 306}; // namespace android 307 308#endif // ANDROID_HWUI_LAYER_H 309