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_OPENGL_RENDERER_H 18 #define ANDROID_HWUI_OPENGL_RENDERER_H 19 20 #include <GLES2/gl2.h> 21 #include <GLES2/gl2ext.h> 22 23 #include <SkBitmap.h> 24 #include <SkMatrix.h> 25 #include <SkPaint.h> 26 #include <SkRegion.h> 27 #include <SkShader.h> 28 #include <SkXfermode.h> 29 30 #include <utils/Functor.h> 31 #include <utils/RefBase.h> 32 #include <utils/SortedVector.h> 33 #include <utils/Vector.h> 34 35 #include <cutils/compiler.h> 36 37 #include "Debug.h" 38 #include "Extensions.h" 39 #include "Matrix.h" 40 #include "Program.h" 41 #include "Rect.h" 42 #include "Snapshot.h" 43 #include "Vertex.h" 44 #include "SkiaShader.h" 45 #include "SkiaColorFilter.h" 46 #include "Caches.h" 47 48 namespace android { 49 namespace uirenderer { 50 51 /////////////////////////////////////////////////////////////////////////////// 52 // Renderer 53 /////////////////////////////////////////////////////////////////////////////// 54 55 class DisplayList; 56 57 /** 58 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 59 * simplified version of Skia's Canvas API. 60 */ 61 class OpenGLRenderer { 62 public: 63 ANDROID_API OpenGLRenderer(); 64 virtual ~OpenGLRenderer(); 65 66 virtual bool isDeferred(); 67 68 virtual void setViewport(int width, int height); 69 70 ANDROID_API int prepare(bool opaque); 71 virtual int prepareDirty(float left, float top, float right, float bottom, bool opaque); 72 virtual void finish(); 73 74 // These two calls must not be recorded in display lists 75 virtual void interrupt(); 76 virtual void resume(); 77 78 ANDROID_API status_t invokeFunctors(Rect& dirty); 79 ANDROID_API void detachFunctor(Functor* functor); 80 ANDROID_API void attachFunctor(Functor* functor); 81 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 82 83 ANDROID_API int getSaveCount() const; 84 virtual int save(int flags); 85 virtual void restore(); 86 virtual void restoreToCount(int saveCount); 87 88 virtual int saveLayer(float left, float top, float right, float bottom, 89 SkPaint* p, int flags); 90 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 91 int alpha, int flags); 92 93 void setAlpha(float alpha) { 94 mSnapshot->alpha = alpha; 95 } 96 97 virtual void translate(float dx, float dy); 98 virtual void rotate(float degrees); 99 virtual void scale(float sx, float sy); 100 virtual void skew(float sx, float sy); 101 102 ANDROID_API void getMatrix(SkMatrix* matrix); 103 virtual void setMatrix(SkMatrix* matrix); 104 virtual void concatMatrix(SkMatrix* matrix); 105 106 ANDROID_API const Rect& getClipBounds(); 107 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 108 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 109 virtual Rect* getClipRect(); 110 111 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 112 uint32_t level = 0); 113 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 114 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 115 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 116 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 117 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 118 float srcRight, float srcBottom, float dstLeft, float dstTop, 119 float dstRight, float dstBottom, SkPaint* paint); 120 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 121 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 122 float* vertices, int* colors, SkPaint* paint); 123 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 124 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 125 float left, float top, float right, float bottom, SkPaint* paint); 126 virtual status_t drawColor(int color, SkXfermode::Mode mode); 127 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 128 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 129 float rx, float ry, SkPaint* paint); 130 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 131 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 132 virtual status_t drawArc(float left, float top, float right, float bottom, 133 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 134 virtual status_t drawPath(SkPath* path, SkPaint* paint); 135 virtual status_t drawLines(float* points, int count, SkPaint* paint); 136 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 137 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 138 SkPaint* paint, float length = -1.0f); 139 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 140 float hOffset, float vOffset, SkPaint* paint); 141 virtual status_t drawPosText(const char* text, int bytesCount, int count, 142 const float* positions, SkPaint* paint); 143 144 virtual void resetShader(); 145 virtual void setupShader(SkiaShader* shader); 146 147 virtual void resetColorFilter(); 148 virtual void setupColorFilter(SkiaColorFilter* filter); 149 150 virtual void resetShadow(); 151 virtual void setupShadow(float radius, float dx, float dy, int color); 152 153 virtual void resetPaintFilter(); 154 virtual void setupPaintFilter(int clearBits, int setBits); 155 156 SkPaint* filterPaint(SkPaint* paint); 157 158 ANDROID_API static uint32_t getStencilSize(); 159 160 void startMark(const char* name) const; 161 void endMark() const; 162 163 protected: 164 /** 165 * Compose the layer defined in the current snapshot with the layer 166 * defined by the previous snapshot. 167 * 168 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 169 * 170 * @param curent The current snapshot containing the layer to compose 171 * @param previous The previous snapshot to compose the current layer with 172 */ 173 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 174 175 /** 176 * Marks the specified region as dirty at the specified bounds. 177 */ 178 void dirtyLayerUnchecked(Rect& bounds, Region* region); 179 180 /** 181 * Returns the current snapshot. 182 */ 183 sp<Snapshot> getSnapshot() { 184 return mSnapshot; 185 } 186 187 /** 188 * Returns the region of the current layer. 189 */ 190 virtual Region* getRegion() { 191 return mSnapshot->region; 192 } 193 194 /** 195 * Indicates whether rendering is currently targeted at a layer. 196 */ 197 virtual bool hasLayer() { 198 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 199 } 200 201 /** 202 * Returns the name of the FBO this renderer is rendering into. 203 */ 204 virtual GLint getTargetFbo() { 205 return 0; 206 } 207 208 /** 209 * Renders the specified layer as a textured quad. 210 * 211 * @param layer The layer to render 212 * @param rect The bounds of the layer 213 */ 214 void drawTextureLayer(Layer* layer, const Rect& rect); 215 216 private: 217 /** 218 * Ensures the state of the renderer is the same as the state of 219 * the GL context. 220 */ 221 void syncState(); 222 223 /** 224 * Saves the current state of the renderer as a new snapshot. 225 * The new snapshot is saved in mSnapshot and the previous snapshot 226 * is linked from mSnapshot->previous. 227 * 228 * @param flags The save flags; see SkCanvas for more information 229 * 230 * @return The new save count. This value can be passed to #restoreToCount() 231 */ 232 int saveSnapshot(int flags); 233 234 /** 235 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 236 * 237 * @return True if the clip was modified. 238 */ 239 bool restoreSnapshot(); 240 241 /** 242 * Sets the clipping rectangle using glScissor. The clip is defined by 243 * the current snapshot's clipRect member. 244 */ 245 void setScissorFromClip(); 246 247 /** 248 * Creates a new layer stored in the specified snapshot. 249 * 250 * @param snapshot The snapshot associated with the new layer 251 * @param left The left coordinate of the layer 252 * @param top The top coordinate of the layer 253 * @param right The right coordinate of the layer 254 * @param bottom The bottom coordinate of the layer 255 * @param alpha The translucency of the layer 256 * @param mode The blending mode of the layer 257 * @param flags The layer save flags 258 * @param previousFbo The name of the current framebuffer 259 * 260 * @return True if the layer was successfully created, false otherwise 261 */ 262 bool createLayer(sp<Snapshot> snapshot, float left, float top, float right, float bottom, 263 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 264 265 /** 266 * Creates a new layer stored in the specified snapshot as an FBO. 267 * 268 * @param layer The layer to store as an FBO 269 * @param snapshot The snapshot associated with the new layer 270 * @param bounds The bounds of the layer 271 * @param previousFbo The name of the current framebuffer 272 */ 273 bool createFboLayer(Layer* layer, Rect& bounds, sp<Snapshot> snapshot, 274 GLuint previousFbo); 275 276 /** 277 * Compose the specified layer as a region. 278 * 279 * @param layer The layer to compose 280 * @param rect The layer's bounds 281 */ 282 void composeLayerRegion(Layer* layer, const Rect& rect); 283 284 /** 285 * Compose the specified layer as a simple rectangle. 286 * 287 * @param layer The layer to compose 288 * @param rect The layer's bounds 289 * @param swap If true, the source and destination are swapped 290 */ 291 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 292 293 /** 294 * Clears all the regions corresponding to the current list of layers. 295 * This method MUST be invoked before any drawing operation. 296 */ 297 void clearLayerRegions(); 298 299 /** 300 * Mark the layer as dirty at the specified coordinates. The coordinates 301 * are transformed with the supplied matrix. 302 */ 303 void dirtyLayer(const float left, const float top, 304 const float right, const float bottom, const mat4 transform); 305 306 /** 307 * Mark the layer as dirty at the specified coordinates. 308 */ 309 void dirtyLayer(const float left, const float top, 310 const float right, const float bottom); 311 312 /** 313 * Draws a colored rectangle with the specified color. The specified coordinates 314 * are transformed by the current snapshot's transform matrix. 315 * 316 * @param left The left coordinate of the rectangle 317 * @param top The top coordinate of the rectangle 318 * @param right The right coordinate of the rectangle 319 * @param bottom The bottom coordinate of the rectangle 320 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 321 * @param mode The Skia xfermode to use 322 * @param ignoreTransform True if the current transform should be ignored 323 * @param ignoreBlending True if the blending is set by the caller 324 */ 325 void drawColorRect(float left, float top, float right, float bottom, 326 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 327 328 /** 329 * Draws the shape represented by the specified path texture. 330 * This method invokes drawPathTexture() but takes into account 331 * the extra left/top offset and the texture offset to correctly 332 * position the final shape. 333 * 334 * @param left The left coordinate of the shape to render 335 * @param top The top coordinate of the shape to render 336 * @param texture The texture reprsenting the shape 337 * @param paint The paint to draw the shape with 338 */ 339 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 340 341 /** 342 * Renders the rect defined by the specified bounds as a shape. 343 * This will render the rect using a path texture, which is used to render 344 * rects with stroke effects. 345 * 346 * @param left The left coordinate of the rect to draw 347 * @param top The top coordinate of the rect to draw 348 * @param right The right coordinate of the rect to draw 349 * @param bottom The bottom coordinate of the rect to draw 350 * @param p The paint to draw the rect with 351 */ 352 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 353 354 /** 355 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 356 * different compositing rules. 357 * 358 * @param texture The texture to draw with 359 * @param left The x coordinate of the bitmap 360 * @param top The y coordinate of the bitmap 361 * @param paint The paint to render with 362 */ 363 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 364 365 /** 366 * Renders the rect defined by the specified bounds as an anti-aliased rect. 367 * 368 * @param left The left coordinate of the rect to draw 369 * @param top The top coordinate of the rect to draw 370 * @param right The right coordinate of the rect to draw 371 * @param bottom The bottom coordinate of the rect to draw 372 * @param color The color of the rect 373 * @param mode The blending mode to draw the rect 374 */ 375 void drawAARect(float left, float top, float right, float bottom, 376 int color, SkXfermode::Mode mode); 377 378 /** 379 * Draws a textured rectangle with the specified texture. The specified coordinates 380 * are transformed by the current snapshot's transform matrix. 381 * 382 * @param left The left coordinate of the rectangle 383 * @param top The top coordinate of the rectangle 384 * @param right The right coordinate of the rectangle 385 * @param bottom The bottom coordinate of the rectangle 386 * @param texture The texture name to map onto the rectangle 387 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 388 * @param mode The blending mode 389 * @param blend True if the texture contains an alpha channel 390 */ 391 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 392 float alpha, SkXfermode::Mode mode, bool blend); 393 394 /** 395 * Draws a textured rectangle with the specified texture. The specified coordinates 396 * are transformed by the current snapshot's transform matrix. 397 * 398 * @param left The left coordinate of the rectangle 399 * @param top The top coordinate of the rectangle 400 * @param right The right coordinate of the rectangle 401 * @param bottom The bottom coordinate of the rectangle 402 * @param texture The texture to use 403 * @param paint The paint containing the alpha, blending mode, etc. 404 */ 405 void drawTextureRect(float left, float top, float right, float bottom, 406 Texture* texture, SkPaint* paint); 407 408 /** 409 * Draws a textured mesh with the specified texture. If the indices are omitted, 410 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 411 * VBO is bound. 412 * 413 * @param left The left coordinate of the rectangle 414 * @param top The top coordinate of the rectangle 415 * @param right The right coordinate of the rectangle 416 * @param bottom The bottom coordinate of the rectangle 417 * @param texture The texture name to map onto the rectangle 418 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 419 * @param mode The blending mode 420 * @param blend True if the texture contains an alpha channel 421 * @param vertices The vertices that define the mesh 422 * @param texCoords The texture coordinates of each vertex 423 * @param elementsCount The number of elements in the mesh, required by indices 424 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 425 * @param ignoreTransform True if the current transform should be ignored 426 * @param vbo The VBO used to draw the mesh 427 * @param ignoreScale True if the model view matrix should not be scaled 428 * @param dirty True if calling this method should dirty the current layer 429 */ 430 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 431 float alpha, SkXfermode::Mode mode, bool blend, 432 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 433 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 434 bool ignoreScale = false, bool dirty = true); 435 436 /** 437 * Draws text underline and strike-through if needed. 438 * 439 * @param text The text to decor 440 * @param bytesCount The number of bytes in the text 441 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 442 * @param x The x coordinate where the text will be drawn 443 * @param y The y coordinate where the text will be drawn 444 * @param paint The paint to draw the text with 445 */ 446 void drawTextDecorations(const char* text, int bytesCount, float length, 447 float x, float y, SkPaint* paint); 448 449 /** 450 * Draws a path texture. Path textures are alpha8 bitmaps that need special 451 * compositing to apply colors/filters/etc. 452 * 453 * @param texture The texture to render 454 * @param x The x coordinate where the texture will be drawn 455 * @param y The y coordinate where the texture will be drawn 456 * @param paint The paint to draw the texture with 457 */ 458 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 459 460 /** 461 * Resets the texture coordinates stored in mMeshVertices. Setting the values 462 * back to default is achieved by calling: 463 * 464 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 465 * 466 * @param u1 The left coordinate of the texture 467 * @param v1 The bottom coordinate of the texture 468 * @param u2 The right coordinate of the texture 469 * @param v2 The top coordinate of the texture 470 */ 471 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 472 473 /** 474 * Gets the alpha and xfermode out of a paint object. If the paint is null 475 * alpha will be 255 and the xfermode will be SRC_OVER. 476 * 477 * @param paint The paint to extract values from 478 * @param alpha Where to store the resulting alpha 479 * @param mode Where to store the resulting xfermode 480 */ 481 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 482 483 /** 484 * Binds the specified texture. The texture unit must have been selected 485 * prior to calling this method. 486 */ 487 inline void bindTexture(GLuint texture) { 488 glBindTexture(GL_TEXTURE_2D, texture); 489 } 490 491 /** 492 * Binds the specified EGLImage texture. The texture unit must have been selected 493 * prior to calling this method. 494 */ 495 inline void bindExternalTexture(GLuint texture) { 496 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 497 } 498 499 /** 500 * Enable or disable blending as necessary. This function sets the appropriate 501 * blend function based on the specified xfermode. 502 */ 503 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 504 bool swapSrcDst = false); 505 506 /** 507 * Safely retrieves the mode from the specified xfermode. If the specified 508 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 509 */ 510 inline SkXfermode::Mode getXfermode(SkXfermode* mode); 511 512 /** 513 * Use the specified program with the current GL context. If the program is already 514 * in use, it will not be bound again. If it is not in use, the current program is 515 * marked unused and the specified program becomes used and becomes the new 516 * current program. 517 * 518 * @param program The program to use 519 * 520 * @return true If the specified program was already in use, false otherwise. 521 */ 522 inline bool useProgram(Program* program); 523 524 /** 525 * Invoked before any drawing operation. This sets required state. 526 */ 527 void setupDraw(bool clear = true); 528 /** 529 * Various methods to setup OpenGL rendering. 530 */ 531 void setupDrawWithTexture(bool isAlpha8 = false); 532 void setupDrawWithExternalTexture(); 533 void setupDrawNoTexture(); 534 void setupDrawAALine(); 535 void setupDrawPoint(float pointSize); 536 void setupDrawColor(int color); 537 void setupDrawColor(int color, int alpha); 538 void setupDrawColor(float r, float g, float b, float a); 539 void setupDrawAlpha8Color(int color, int alpha); 540 void setupDrawAlpha8Color(float r, float g, float b, float a); 541 void setupDrawShader(); 542 void setupDrawColorFilter(); 543 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 544 bool swapSrcDst = false); 545 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 546 bool swapSrcDst = false); 547 void setupDrawProgram(); 548 void setupDrawDirtyRegionsDisabled(); 549 void setupDrawModelViewIdentity(bool offset = false); 550 void setupDrawModelView(float left, float top, float right, float bottom, 551 bool ignoreTransform = false, bool ignoreModelView = false); 552 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 553 bool ignoreTransform = false); 554 void setupDrawPointUniforms(); 555 void setupDrawColorUniforms(); 556 void setupDrawPureColorUniforms(); 557 void setupDrawShaderIdentityUniforms(); 558 void setupDrawShaderUniforms(bool ignoreTransform = false); 559 void setupDrawColorFilterUniforms(); 560 void setupDrawSimpleMesh(); 561 void setupDrawTexture(GLuint texture); 562 void setupDrawExternalTexture(GLuint texture); 563 void setupDrawTextureTransform(); 564 void setupDrawTextureTransformUniforms(mat4& transform); 565 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 566 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 567 void setupDrawVertices(GLvoid* vertices); 568 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 569 float strokeWidth, int& widthSlot, int& lengthSlot); 570 void finishDrawAALine(const int widthSlot, const int lengthSlot); 571 void finishDrawTexture(); 572 void accountForClear(SkXfermode::Mode mode); 573 574 void drawRegionRects(const Region& region); 575 576 /** 577 * Should be invoked every time the glScissor is modified. 578 */ 579 inline void dirtyClip() { 580 mDirtyClip = true; 581 } 582 583 // Dimensions of the drawing surface 584 int mWidth, mHeight; 585 586 // Matrix used for ortho projection in shaders 587 mat4 mOrthoMatrix; 588 589 // Model-view matrix used to position/size objects 590 mat4 mModelView; 591 592 // Number of saved states 593 int mSaveCount; 594 // Base state 595 sp<Snapshot> mFirstSnapshot; 596 // Current state 597 sp<Snapshot> mSnapshot; 598 599 // Shaders 600 SkiaShader* mShader; 601 602 // Color filters 603 SkiaColorFilter* mColorFilter; 604 605 // Used to draw textured quads 606 TextureVertex mMeshVertices[4]; 607 608 // Drop shadow 609 bool mHasShadow; 610 float mShadowRadius; 611 float mShadowDx; 612 float mShadowDy; 613 int mShadowColor; 614 615 // Draw filters 616 bool mHasDrawFilter; 617 int mPaintFilterClearBits; 618 int mPaintFilterSetBits; 619 SkPaint mFilteredPaint; 620 621 // Various caches 622 Caches& mCaches; 623 624 // List of rectangles to clear after saveLayer() is invoked 625 Vector<Rect*> mLayers; 626 // List of functors to invoke after a frame is drawn 627 SortedVector<Functor*> mFunctors; 628 629 // Indentity matrix 630 const mat4 mIdentity; 631 632 // Indicates whether the clip must be restored 633 bool mDirtyClip; 634 635 // The following fields are used to setup drawing 636 // Used to describe the shaders to generate 637 ProgramDescription mDescription; 638 // Color description 639 bool mColorSet; 640 float mColorA, mColorR, mColorG, mColorB; 641 // Indicates that the shader should get a color 642 bool mSetShaderColor; 643 // Current texture unit 644 GLuint mTextureUnit; 645 // Track dirty regions, true by default 646 bool mTrackDirtyRegions; 647 648 friend class DisplayListRenderer; 649 650 }; // class OpenGLRenderer 651 652 }; // namespace uirenderer 653 }; // namespace android 654 655 #endif // ANDROID_HWUI_OPENGL_RENDERER_H 656