OpenGLRenderer.h revision dcfc836b457a87881da409e1acf251515f121446
100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty/* 200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Copyright (C) 2010 The Android Open Source Project 300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Licensed under the Apache License, Version 2.0 (the "License"); 500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * you may not use this file except in compliance with the License. 600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * You may obtain a copy of the License at 700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * http://www.apache.org/licenses/LICENSE-2.0 900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 1000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Unless required by applicable law or agreed to in writing, software 1100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * distributed under the License is distributed on an "AS IS" BASIS, 1200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * See the License for the specific language governing permissions and 1400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * limitations under the License. 1500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 1600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 1700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#ifndef ANDROID_HWUI_OPENGL_RENDERER_H 1800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#define ANDROID_HWUI_OPENGL_RENDERER_H 1900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 2000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <GLES2/gl2.h> 2100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <GLES2/gl2ext.h> 2200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 2300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkBitmap.h> 2400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkMatrix.h> 2500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkPaint.h> 2600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkRegion.h> 2700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkShader.h> 2800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <SkXfermode.h> 2900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 3000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <utils/Functor.h> 3100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <utils/RefBase.h> 3200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <utils/SortedVector.h> 3300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <utils/Vector.h> 3400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 3500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include <cutils/compiler.h> 3600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 3700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Debug.h" 3800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Extensions.h" 3900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Matrix.h" 4000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Program.h" 4100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Rect.h" 4200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Snapshot.h" 4300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Vertex.h" 4400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "SkiaShader.h" 4500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "SkiaColorFilter.h" 4600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty#include "Caches.h" 4700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 4800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Doughertynamespace android { 4900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Doughertynamespace uirenderer { 5000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 5100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty/////////////////////////////////////////////////////////////////////////////// 5200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty// Renderer 5300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty/////////////////////////////////////////////////////////////////////////////// 5400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 5500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Doughertyclass DisplayList; 5600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 5700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty/** 5800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * OpenGL renderer used to draw accelerated 2D graphics. The API is a 5900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * simplified version of Skia's Canvas API. 6000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 6100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Doughertyclass OpenGLRenderer { 6200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Doughertypublic: 6300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty ANDROID_API OpenGLRenderer(); 6400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty virtual ~OpenGLRenderer(); 6500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 6600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 6700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Read externally defined properties to control the behavior 6800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * of the renderer. 6900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 7000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty ANDROID_API void initProperties(); 7100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 7200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 7300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Indicates whether this renderer executes drawing commands immediately. 7400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * If this method returns true, the drawing commands will be executed 7500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * later. 7600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 7700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty virtual bool isDeferred(); 7800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 7900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 8000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Sets the dimension of the underlying drawing surface. This method must 8100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * be called at least once every time the drawing surface changes size. 8200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 8300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param width The width in pixels of the underlysing surface 8400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param height The height in pixels of the underlysing surface 8500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 8600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty virtual void setViewport(int width, int height); 8700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 8800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 8900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Prepares the renderer to draw a frame. This method must be invoked 9000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * at the beginning of each frame. When this method is invoked, the 9100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * entire drawing surface is assumed to be redrawn. 9200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 9300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param opaque If true, the target surface is considered opaque 9400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * and will not be cleared. If false, the target surface 9500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * will be cleared 9600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 9700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty ANDROID_API status_t prepare(bool opaque); 9800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 9900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 10000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Prepares the renderer to draw a frame. This method must be invoked 10100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * at the beginning of each frame. Only the specified rectangle of the 10200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * frame is assumed to be dirty. A clip will automatically be set to 10300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * the specified rectangle. 10400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 10500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param left The left coordinate of the dirty rectangle 10600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param top The top coordinate of the dirty rectangle 10700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param right The right coordinate of the dirty rectangle 10800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param bottom The bottom coordinate of the dirty rectangle 10900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * @param opaque If true, the target surface is considered opaque 11000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * and will not be cleared. If false, the target surface 11100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * will be cleared in the specified dirty rectangle 11200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 11300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 11400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 11500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 11600cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * Indicates the end of a frame. This method must be invoked whenever 11700cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * the caller is done rendering a frame. 11800cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty */ 11900cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty virtual void finish(); 12000cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty 12100cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty /** 12200cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * This method must be invoked before handing control over to a draw functor. 12300cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * See callDrawGLFunction() for instance. 12400cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * 12500cf93835f31b68ffabfc885b42a6301d7b031c3Dirk Dougherty * This command must not be recorded inside display lists. 126 */ 127 virtual void interrupt(); 128 129 /** 130 * This method must be invoked after getting control back from a draw functor. 131 * 132 * This command must not be recorded inside display lists. 133 */ 134 virtual void resume(); 135 136 ANDROID_API status_t invokeFunctors(Rect& dirty); 137 ANDROID_API void detachFunctor(Functor* functor); 138 ANDROID_API void attachFunctor(Functor* functor); 139 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 140 141 ANDROID_API void pushLayerUpdate(Layer* layer); 142 ANDROID_API void clearLayerUpdates(); 143 144 ANDROID_API int getSaveCount() const; 145 virtual int save(int flags); 146 virtual void restore(); 147 virtual void restoreToCount(int saveCount); 148 149 virtual int saveLayer(float left, float top, float right, float bottom, 150 SkPaint* p, int flags); 151 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 152 int alpha, int flags); 153 154 virtual void translate(float dx, float dy); 155 virtual void rotate(float degrees); 156 virtual void scale(float sx, float sy); 157 virtual void skew(float sx, float sy); 158 159 ANDROID_API void getMatrix(SkMatrix* matrix); 160 virtual void setMatrix(SkMatrix* matrix); 161 virtual void concatMatrix(SkMatrix* matrix); 162 163 ANDROID_API const Rect& getClipBounds(); 164 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 165 bool quickRejectNoScissor(float left, float top, float right, float bottom); 166 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 167 virtual Rect* getClipRect(); 168 169 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 170 uint32_t level = 0); 171 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 172 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 173 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 174 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 175 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 176 float srcRight, float srcBottom, float dstLeft, float dstTop, 177 float dstRight, float dstBottom, SkPaint* paint); 178 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 179 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 180 float* vertices, int* colors, SkPaint* paint); 181 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 182 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 183 float left, float top, float right, float bottom, SkPaint* paint); 184 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 185 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 186 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 187 virtual status_t drawColor(int color, SkXfermode::Mode mode); 188 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 189 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 190 float rx, float ry, SkPaint* paint); 191 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 192 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 193 virtual status_t drawArc(float left, float top, float right, float bottom, 194 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 195 virtual status_t drawPath(SkPath* path, SkPaint* paint); 196 virtual status_t drawLines(float* points, int count, SkPaint* paint); 197 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 198 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 199 float hOffset, float vOffset, SkPaint* paint); 200 virtual status_t drawPosText(const char* text, int bytesCount, int count, 201 const float* positions, SkPaint* paint); 202 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 203 const float* positions, SkPaint* paint, float length = -1.0f); 204 205 virtual void resetShader(); 206 virtual void setupShader(SkiaShader* shader); 207 208 virtual void resetColorFilter(); 209 virtual void setupColorFilter(SkiaColorFilter* filter); 210 211 virtual void resetShadow(); 212 virtual void setupShadow(float radius, float dx, float dy, int color); 213 214 virtual void resetPaintFilter(); 215 virtual void setupPaintFilter(int clearBits, int setBits); 216 217 SkPaint* filterPaint(SkPaint* paint); 218 219 /** 220 * Sets the alpha on the current snapshot. This alpha value will be modulated 221 * with other alpha values when drawing primitives. 222 */ 223 void setAlpha(float alpha) { 224 mSnapshot->alpha = alpha; 225 } 226 227 /** 228 * Inserts a named group marker in the stream of GL commands. This marker 229 * can be used by tools to group commands into logical groups. A call to 230 * this method must always be followed later on by a call to endMark(). 231 */ 232 void startMark(const char* name) const; 233 234 /** 235 * Closes the last group marker opened by startMark(). 236 */ 237 void endMark() const; 238 239 /** 240 * Gets the alpha and xfermode out of a paint object. If the paint is null 241 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 242 * not multiply the paint's alpha by the current snapshot's alpha. 243 * 244 * @param paint The paint to extract values from 245 * @param alpha Where to store the resulting alpha 246 * @param mode Where to store the resulting xfermode 247 */ 248 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 249 if (paint) { 250 *mode = getXfermode(paint->getXfermode()); 251 252 // Skia draws using the color's alpha channel if < 255 253 // Otherwise, it uses the paint's alpha 254 int color = paint->getColor(); 255 *alpha = (color >> 24) & 0xFF; 256 if (*alpha == 255) { 257 *alpha = paint->getAlpha(); 258 } 259 } else { 260 *mode = SkXfermode::kSrcOver_Mode; 261 *alpha = 255; 262 } 263 } 264 265protected: 266 /** 267 * Computes the projection matrix, initialize the first snapshot 268 * and stores the dimensions of the render target. 269 */ 270 void initViewport(int width, int height); 271 272 /** 273 * Clears the underlying surface if needed. 274 */ 275 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 276 277 /** 278 * Call this method after updating a layer during a drawing pass. 279 */ 280 void resumeAfterLayer(); 281 282 /** 283 * Compose the layer defined in the current snapshot with the layer 284 * defined by the previous snapshot. 285 * 286 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 287 * 288 * @param curent The current snapshot containing the layer to compose 289 * @param previous The previous snapshot to compose the current layer with 290 */ 291 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 292 293 /** 294 * Marks the specified region as dirty at the specified bounds. 295 */ 296 void dirtyLayerUnchecked(Rect& bounds, Region* region); 297 298 /** 299 * Returns the current snapshot. 300 */ 301 sp<Snapshot> getSnapshot() { 302 return mSnapshot; 303 } 304 305 /** 306 * Returns the region of the current layer. 307 */ 308 virtual Region* getRegion() { 309 return mSnapshot->region; 310 } 311 312 /** 313 * Indicates whether rendering is currently targeted at a layer. 314 */ 315 virtual bool hasLayer() { 316 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 317 } 318 319 /** 320 * Returns the name of the FBO this renderer is rendering into. 321 */ 322 virtual GLint getTargetFbo() { 323 return 0; 324 } 325 326 /** 327 * Renders the specified layer as a textured quad. 328 * 329 * @param layer The layer to render 330 * @param rect The bounds of the layer 331 */ 332 void drawTextureLayer(Layer* layer, const Rect& rect); 333 334 /** 335 * Gets the alpha and xfermode out of a paint object. If the paint is null 336 * alpha will be 255 and the xfermode will be SRC_OVER. 337 * 338 * @param paint The paint to extract values from 339 * @param alpha Where to store the resulting alpha 340 * @param mode Where to store the resulting xfermode 341 */ 342 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 343 344 /** 345 * Safely retrieves the mode from the specified xfermode. If the specified 346 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 347 */ 348 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 349 SkXfermode::Mode resultMode; 350 if (!SkXfermode::AsMode(mode, &resultMode)) { 351 resultMode = SkXfermode::kSrcOver_Mode; 352 } 353 return resultMode; 354 } 355 356 /** 357 * Set to true to suppress error checks at the end of a frame. 358 */ 359 virtual bool suppressErrorChecks() { 360 return false; 361 } 362 363 Caches& getCaches() { 364 return mCaches; 365 } 366 367private: 368 /** 369 * Discards the content of the framebuffer if supported by the driver. 370 * This method should be called at the beginning of a frame to optimize 371 * rendering on some tiler architectures. 372 */ 373 void discardFramebuffer(float left, float top, float right, float bottom); 374 375 /** 376 * Ensures the state of the renderer is the same as the state of 377 * the GL context. 378 */ 379 void syncState(); 380 381 /** 382 * Tells the GPU what part of the screen is about to be redrawn. 383 * This method needs to be invoked every time getTargetFbo() is 384 * bound again. 385 */ 386 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 387 388 /** 389 * Tells the GPU that we are done drawing the frame or that we 390 * are switching to another render target. 391 */ 392 void endTiling(); 393 394 /** 395 * Saves the current state of the renderer as a new snapshot. 396 * The new snapshot is saved in mSnapshot and the previous snapshot 397 * is linked from mSnapshot->previous. 398 * 399 * @param flags The save flags; see SkCanvas for more information 400 * 401 * @return The new save count. This value can be passed to #restoreToCount() 402 */ 403 int saveSnapshot(int flags); 404 405 /** 406 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 407 * 408 * @return True if the clip was modified. 409 */ 410 bool restoreSnapshot(); 411 412 /** 413 * Sets the clipping rectangle using glScissor. The clip is defined by 414 * the current snapshot's clipRect member. 415 */ 416 void setScissorFromClip(); 417 418 /** 419 * Performs a quick reject but does not affect the scissor. Returns 420 * the transformed rect to test and the current clip. 421 */ 422 bool quickRejectNoScissor(float left, float top, float right, float bottom, 423 Rect& transformed, Rect& clip); 424 425 /** 426 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 427 */ 428 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 429 430 /** 431 * Creates a new layer stored in the specified snapshot. 432 * 433 * @param snapshot The snapshot associated with the new layer 434 * @param left The left coordinate of the layer 435 * @param top The top coordinate of the layer 436 * @param right The right coordinate of the layer 437 * @param bottom The bottom coordinate of the layer 438 * @param alpha The translucency of the layer 439 * @param mode The blending mode of the layer 440 * @param flags The layer save flags 441 * @param previousFbo The name of the current framebuffer 442 * 443 * @return True if the layer was successfully created, false otherwise 444 */ 445 bool createLayer(float left, float top, float right, float bottom, 446 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 447 448 /** 449 * Creates a new layer stored in the specified snapshot as an FBO. 450 * 451 * @param layer The layer to store as an FBO 452 * @param snapshot The snapshot associated with the new layer 453 * @param bounds The bounds of the layer 454 * @param previousFbo The name of the current framebuffer 455 */ 456 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 457 458 /** 459 * Compose the specified layer as a region. 460 * 461 * @param layer The layer to compose 462 * @param rect The layer's bounds 463 */ 464 void composeLayerRegion(Layer* layer, const Rect& rect); 465 466 /** 467 * Compose the specified layer as a simple rectangle. 468 * 469 * @param layer The layer to compose 470 * @param rect The layer's bounds 471 * @param swap If true, the source and destination are swapped 472 */ 473 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 474 475 /** 476 * Clears all the regions corresponding to the current list of layers. 477 * This method MUST be invoked before any drawing operation. 478 */ 479 void clearLayerRegions(); 480 481 /** 482 * Mark the layer as dirty at the specified coordinates. The coordinates 483 * are transformed with the supplied matrix. 484 */ 485 void dirtyLayer(const float left, const float top, 486 const float right, const float bottom, const mat4 transform); 487 488 /** 489 * Mark the layer as dirty at the specified coordinates. 490 */ 491 void dirtyLayer(const float left, const float top, 492 const float right, const float bottom); 493 494 /** 495 * Draws a colored rectangle with the specified color. The specified coordinates 496 * are transformed by the current snapshot's transform matrix. 497 * 498 * @param left The left coordinate of the rectangle 499 * @param top The top coordinate of the rectangle 500 * @param right The right coordinate of the rectangle 501 * @param bottom The bottom coordinate of the rectangle 502 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 503 * @param mode The Skia xfermode to use 504 * @param ignoreTransform True if the current transform should be ignored 505 */ 506 void drawColorRect(float left, float top, float right, float bottom, 507 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 508 509 /** 510 * Draws the shape represented by the specified path texture. 511 * This method invokes drawPathTexture() but takes into account 512 * the extra left/top offset and the texture offset to correctly 513 * position the final shape. 514 * 515 * @param left The left coordinate of the shape to render 516 * @param top The top coordinate of the shape to render 517 * @param texture The texture reprsenting the shape 518 * @param paint The paint to draw the shape with 519 */ 520 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 521 522 /** 523 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 524 * different compositing rules. 525 * 526 * @param texture The texture to draw with 527 * @param left The x coordinate of the bitmap 528 * @param top The y coordinate of the bitmap 529 * @param paint The paint to render with 530 */ 531 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 532 533 /** 534 * Renders the convex hull defined by the specified path as a strip of polygons. 535 * 536 * @param path The hull of the path to draw 537 * @param paint The paint to render with 538 */ 539 void drawConvexPath(const SkPath& path, SkPaint* paint); 540 541 /** 542 * Draws a textured rectangle with the specified texture. The specified coordinates 543 * are transformed by the current snapshot's transform matrix. 544 * 545 * @param left The left coordinate of the rectangle 546 * @param top The top coordinate of the rectangle 547 * @param right The right coordinate of the rectangle 548 * @param bottom The bottom coordinate of the rectangle 549 * @param texture The texture name to map onto the rectangle 550 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 551 * @param mode The blending mode 552 * @param blend True if the texture contains an alpha channel 553 */ 554 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 555 float alpha, SkXfermode::Mode mode, bool blend); 556 557 /** 558 * Draws a textured rectangle with the specified texture. The specified coordinates 559 * are transformed by the current snapshot's transform matrix. 560 * 561 * @param left The left coordinate of the rectangle 562 * @param top The top coordinate of the rectangle 563 * @param right The right coordinate of the rectangle 564 * @param bottom The bottom coordinate of the rectangle 565 * @param texture The texture to use 566 * @param paint The paint containing the alpha, blending mode, etc. 567 */ 568 void drawTextureRect(float left, float top, float right, float bottom, 569 Texture* texture, SkPaint* paint); 570 571 /** 572 * Draws a textured mesh with the specified texture. If the indices are omitted, 573 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 574 * VBO is bound. 575 * 576 * @param left The left coordinate of the rectangle 577 * @param top The top coordinate of the rectangle 578 * @param right The right coordinate of the rectangle 579 * @param bottom The bottom coordinate of the rectangle 580 * @param texture The texture name to map onto the rectangle 581 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 582 * @param mode The blending mode 583 * @param blend True if the texture contains an alpha channel 584 * @param vertices The vertices that define the mesh 585 * @param texCoords The texture coordinates of each vertex 586 * @param elementsCount The number of elements in the mesh, required by indices 587 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 588 * @param ignoreTransform True if the current transform should be ignored 589 * @param vbo The VBO used to draw the mesh 590 * @param ignoreScale True if the model view matrix should not be scaled 591 * @param dirty True if calling this method should dirty the current layer 592 */ 593 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 594 float alpha, SkXfermode::Mode mode, bool blend, 595 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 596 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 597 bool ignoreScale = false, bool dirty = true); 598 599 /** 600 * Draws text underline and strike-through if needed. 601 * 602 * @param text The text to decor 603 * @param bytesCount The number of bytes in the text 604 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 605 * @param x The x coordinate where the text will be drawn 606 * @param y The y coordinate where the text will be drawn 607 * @param paint The paint to draw the text with 608 */ 609 void drawTextDecorations(const char* text, int bytesCount, float length, 610 float x, float y, SkPaint* paint); 611 612 /** 613 * Draws shadow layer on text (with optional positions). 614 * 615 * @param paint The paint to draw the shadow with 616 * @param text The text to draw 617 * @param bytesCount The number of bytes in the text 618 * @param count The number of glyphs in the text 619 * @param positions The x, y positions of individual glyphs (or NULL) 620 * @param fontRenderer The font renderer object 621 * @param alpha The alpha value for drawing the shadow 622 * @param mode The xfermode for drawing the shadow 623 * @param x The x coordinate where the shadow will be drawn 624 * @param y The y coordinate where the shadow will be drawn 625 */ 626 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 627 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 628 float x, float y); 629 630 /** 631 * Draws a path texture. Path textures are alpha8 bitmaps that need special 632 * compositing to apply colors/filters/etc. 633 * 634 * @param texture The texture to render 635 * @param x The x coordinate where the texture will be drawn 636 * @param y The y coordinate where the texture will be drawn 637 * @param paint The paint to draw the texture with 638 */ 639 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 640 641 /** 642 * Resets the texture coordinates stored in mMeshVertices. Setting the values 643 * back to default is achieved by calling: 644 * 645 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 646 * 647 * @param u1 The left coordinate of the texture 648 * @param v1 The bottom coordinate of the texture 649 * @param u2 The right coordinate of the texture 650 * @param v2 The top coordinate of the texture 651 */ 652 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 653 654 /** 655 * Binds the specified texture. The texture unit must have been selected 656 * prior to calling this method. 657 */ 658 inline void bindTexture(GLuint texture) { 659 glBindTexture(GL_TEXTURE_2D, texture); 660 } 661 662 /** 663 * Binds the specified EGLImage texture. The texture unit must have been selected 664 * prior to calling this method. 665 */ 666 inline void bindExternalTexture(GLuint texture) { 667 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 668 } 669 670 /** 671 * Enable or disable blending as necessary. This function sets the appropriate 672 * blend function based on the specified xfermode. 673 */ 674 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 675 bool swapSrcDst = false); 676 677 /** 678 * Use the specified program with the current GL context. If the program is already 679 * in use, it will not be bound again. If it is not in use, the current program is 680 * marked unused and the specified program becomes used and becomes the new 681 * current program. 682 * 683 * @param program The program to use 684 * 685 * @return true If the specified program was already in use, false otherwise. 686 */ 687 inline bool useProgram(Program* program); 688 689 /** 690 * Invoked before any drawing operation. This sets required state. 691 */ 692 void setupDraw(bool clear = true); 693 694 /** 695 * Various methods to setup OpenGL rendering. 696 */ 697 void setupDrawWithTexture(bool isAlpha8 = false); 698 void setupDrawWithExternalTexture(); 699 void setupDrawNoTexture(); 700 void setupDrawAA(); 701 void setupDrawVertexShape(); 702 void setupDrawPoint(float pointSize); 703 void setupDrawColor(int color); 704 void setupDrawColor(int color, int alpha); 705 void setupDrawColor(float r, float g, float b, float a); 706 void setupDrawAlpha8Color(int color, int alpha); 707 void setupDrawTextGamma(const SkPaint* paint); 708 void setupDrawShader(); 709 void setupDrawColorFilter(); 710 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 711 bool swapSrcDst = false); 712 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 713 bool swapSrcDst = false); 714 void setupDrawProgram(); 715 void setupDrawDirtyRegionsDisabled(); 716 void setupDrawModelViewIdentity(bool offset = false); 717 void setupDrawModelView(float left, float top, float right, float bottom, 718 bool ignoreTransform = false, bool ignoreModelView = false); 719 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 720 bool ignoreTransform = false); 721 void setupDrawPointUniforms(); 722 void setupDrawColorUniforms(); 723 void setupDrawPureColorUniforms(); 724 void setupDrawShaderIdentityUniforms(); 725 void setupDrawShaderUniforms(bool ignoreTransform = false); 726 void setupDrawColorFilterUniforms(); 727 void setupDrawSimpleMesh(); 728 void setupDrawTexture(GLuint texture); 729 void setupDrawExternalTexture(GLuint texture); 730 void setupDrawTextureTransform(); 731 void setupDrawTextureTransformUniforms(mat4& transform); 732 void setupDrawTextGammaUniforms(); 733 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 734 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 735 void setupDrawVertices(GLvoid* vertices); 736 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 737 float strokeWidth, int& widthSlot, int& lengthSlot); 738 void finishDrawAALine(const int widthSlot, const int lengthSlot); 739 void finishDrawTexture(); 740 void accountForClear(SkXfermode::Mode mode); 741 742 bool updateLayer(Layer* layer, bool inFrame); 743 void updateLayers(); 744 745 /** 746 * Renders the specified region as a series of rectangles. This method 747 * is used for debugging only. 748 */ 749 void drawRegionRects(const Region& region); 750 751 void debugOverdraw(bool enable, bool clear); 752 void renderOverdraw(); 753 754 /** 755 * Should be invoked every time the glScissor is modified. 756 */ 757 inline void dirtyClip() { 758 mDirtyClip = true; 759 } 760 761 // Dimensions of the drawing surface 762 int mWidth, mHeight; 763 764 // Matrix used for ortho projection in shaders 765 mat4 mOrthoMatrix; 766 767 // Model-view matrix used to position/size objects 768 mat4 mModelView; 769 770 // Number of saved states 771 int mSaveCount; 772 // Base state 773 sp<Snapshot> mFirstSnapshot; 774 // Current state 775 sp<Snapshot> mSnapshot; 776 // State used to define the clipping region 777 sp<Snapshot> mTilingSnapshot; 778 779 // Shaders 780 SkiaShader* mShader; 781 782 // Color filters 783 SkiaColorFilter* mColorFilter; 784 785 // Used to draw textured quads 786 TextureVertex mMeshVertices[4]; 787 788 // Drop shadow 789 bool mHasShadow; 790 float mShadowRadius; 791 float mShadowDx; 792 float mShadowDy; 793 int mShadowColor; 794 795 // Draw filters 796 bool mHasDrawFilter; 797 int mPaintFilterClearBits; 798 int mPaintFilterSetBits; 799 SkPaint mFilteredPaint; 800 801 // Various caches 802 Caches& mCaches; 803 804 // List of rectangles to clear after saveLayer() is invoked 805 Vector<Rect*> mLayers; 806 // List of functors to invoke after a frame is drawn 807 SortedVector<Functor*> mFunctors; 808 // List of layers to update at the beginning of a frame 809 Vector<Layer*> mLayerUpdates; 810 811 // Indentity matrix 812 const mat4 mIdentity; 813 814 // Indicates whether the clip must be restored 815 bool mDirtyClip; 816 817 // The following fields are used to setup drawing 818 // Used to describe the shaders to generate 819 ProgramDescription mDescription; 820 // Color description 821 bool mColorSet; 822 float mColorA, mColorR, mColorG, mColorB; 823 // Indicates that the shader should get a color 824 bool mSetShaderColor; 825 // Current texture unit 826 GLuint mTextureUnit; 827 // Track dirty regions, true by default 828 bool mTrackDirtyRegions; 829 // Indicate whether we are drawing an opaque frame 830 bool mOpaqueFrame; 831 832 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 833 // Properties.h 834 bool mScissorOptimizationDisabled; 835 836 // No-ops start/endTiling when set 837 bool mSuppressTiling; 838 839 friend class DisplayListRenderer; 840 841}; // class OpenGLRenderer 842 843}; // namespace uirenderer 844}; // namespace android 845 846#endif // ANDROID_HWUI_OPENGL_RENDERER_H 847