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 "CanvasState.h" 21 #include "Debug.h" 22 #include "Extensions.h" 23 #include "Matrix.h" 24 #include "Program.h" 25 #include "Rect.h" 26 #include "Snapshot.h" 27 #include "UvMapper.h" 28 #include "Vertex.h" 29 #include "Caches.h" 30 #include "utils/PaintUtils.h" 31 32 #include <GLES2/gl2.h> 33 #include <GLES2/gl2ext.h> 34 35 #include <SkBitmap.h> 36 #include <SkCanvas.h> 37 #include <SkColorFilter.h> 38 #include <SkMatrix.h> 39 #include <SkPaint.h> 40 #include <SkRegion.h> 41 #include <SkXfermode.h> 42 43 #include <utils/Blur.h> 44 #include <utils/Functor.h> 45 #include <utils/RefBase.h> 46 #include <utils/SortedVector.h> 47 #include <utils/Vector.h> 48 49 #include <cutils/compiler.h> 50 51 #include <androidfw/ResourceTypes.h> 52 53 class SkShader; 54 55 namespace android { 56 namespace uirenderer { 57 58 enum class DrawOpMode { 59 kImmediate, 60 kDefer, 61 kFlush 62 }; 63 64 class DeferredDisplayState; 65 struct Glop; 66 class RenderState; 67 class RenderNode; 68 class TextDrawFunctor; 69 class VertexBuffer; 70 71 enum StateDeferFlags { 72 kStateDeferFlag_Draw = 0x1, 73 kStateDeferFlag_Clip = 0x2 74 }; 75 76 enum ClipSideFlags { 77 kClipSide_None = 0x0, 78 kClipSide_Left = 0x1, 79 kClipSide_Top = 0x2, 80 kClipSide_Right = 0x4, 81 kClipSide_Bottom = 0x8, 82 kClipSide_Full = 0xF, 83 kClipSide_ConservativeFull = 0x1F 84 }; 85 86 enum VertexBufferDisplayFlags { 87 kVertexBuffer_Offset = 0x1, 88 kVertexBuffer_ShadowInterp = 0x2, 89 }; 90 91 /** 92 * Defines additional transformation that should be applied by the model view matrix, beyond that of 93 * the currentTransform() 94 */ 95 enum ModelViewMode { 96 /** 97 * Used when the model view should simply translate geometry passed to the shader. The resulting 98 * matrix will be a simple translation. 99 */ 100 kModelViewMode_Translate = 0, 101 102 /** 103 * Used when the model view should translate and scale geometry. The resulting matrix will be a 104 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 105 */ 106 kModelViewMode_TranslateAndScale = 1, 107 }; 108 109 /////////////////////////////////////////////////////////////////////////////// 110 // Renderer 111 /////////////////////////////////////////////////////////////////////////////// 112 /** 113 * OpenGL Renderer implementation. 114 */ 115 class OpenGLRenderer : public CanvasStateClient { 116 public: 117 OpenGLRenderer(RenderState& renderState); 118 virtual ~OpenGLRenderer(); 119 120 /** 121 * Sets the dimension of the underlying drawing surface. This method must 122 * be called at least once every time the drawing surface changes size. 123 * 124 * @param width The width in pixels of the underlysing surface 125 * @param height The height in pixels of the underlysing surface 126 */ setViewport(int width,int height)127 void setViewport(int width, int height) { mState.setViewport(width, height); } 128 129 void initProperties(); 130 void initLight(float lightRadius, uint8_t ambientShadowAlpha, 131 uint8_t spotShadowAlpha); 132 void setLightCenter(const Vector3& lightCenter); 133 134 /* 135 * Prepares the renderer to draw a frame. This method must be invoked 136 * at the beginning of each frame. Only the specified rectangle of the 137 * frame is assumed to be dirty. A clip will automatically be set to 138 * the specified rectangle. 139 * 140 * @param opaque If true, the target surface is considered opaque 141 * and will not be cleared. If false, the target surface 142 * will be cleared 143 */ 144 virtual void prepareDirty(float left, float top, float right, float bottom, 145 bool opaque); 146 147 /** 148 * Prepares the renderer to draw a frame. This method must be invoked 149 * at the beginning of each frame. When this method is invoked, the 150 * entire drawing surface is assumed to be redrawn. 151 * 152 * @param opaque If true, the target surface is considered opaque 153 * and will not be cleared. If false, the target surface 154 * will be cleared 155 */ prepare(bool opaque)156 void prepare(bool opaque) { 157 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 158 } 159 160 /** 161 * Indicates the end of a frame. This method must be invoked whenever 162 * the caller is done rendering a frame. 163 * Returns true if any drawing was done during the frame (the output 164 * has changed / is "dirty" and should be displayed to the user). 165 */ 166 virtual bool finish(); 167 168 void callDrawGLFunction(Functor* functor, Rect& dirty); 169 170 void pushLayerUpdate(Layer* layer); 171 void cancelLayerUpdate(Layer* layer); 172 void flushLayerUpdates(); 173 void markLayersAsBuildLayers(); 174 saveLayer(float left,float top,float right,float bottom,const SkPaint * paint,int flags)175 virtual int saveLayer(float left, float top, float right, float bottom, 176 const SkPaint* paint, int flags) { 177 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 178 } 179 180 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 181 // created, which will in turn clip to that mask when drawn back/restored. 182 int saveLayer(float left, float top, float right, float bottom, 183 const SkPaint* paint, int flags, const SkPath* convexMask); 184 185 int saveLayerDeferred(float left, float top, float right, float bottom, 186 const SkPaint* paint, int flags); 187 188 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 189 void drawLayer(Layer* layer, float x, float y); 190 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 191 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 192 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 193 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 194 const SkPaint* paint); 195 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 196 const float* vertices, const int* colors, const SkPaint* paint); 197 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 198 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 199 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 200 float left, float top, float right, float bottom, const SkPaint* paint); 201 void drawColor(int color, SkXfermode::Mode mode); 202 void drawRect(float left, float top, float right, float bottom, 203 const SkPaint* paint); 204 void drawRoundRect(float left, float top, float right, float bottom, 205 float rx, float ry, const SkPaint* paint); 206 void drawCircle(float x, float y, float radius, const SkPaint* paint); 207 void drawOval(float left, float top, float right, float bottom, 208 const SkPaint* paint); 209 void drawArc(float left, float top, float right, float bottom, 210 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 211 void drawPath(const SkPath* path, const SkPaint* paint); 212 void drawLines(const float* points, int count, const SkPaint* paint); 213 void drawPoints(const float* points, int count, const SkPaint* paint); 214 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 215 float hOffset, float vOffset, const SkPaint* paint); 216 void drawPosText(const char* text, int bytesCount, int count, 217 const float* positions, const SkPaint* paint); 218 void drawText(const char* text, int bytesCount, int count, float x, float y, 219 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 220 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 221 void drawRects(const float* rects, int count, const SkPaint* paint); 222 223 void drawShadow(float casterAlpha, 224 const VertexBuffer* ambientShadowVertexBuffer, 225 const VertexBuffer* spotShadowVertexBuffer); 226 227 void setDrawFilter(SkDrawFilter* filter); 228 229 /** 230 * Store the current display state (most importantly, the current clip and transform), and 231 * additionally map the state's bounds from local to window coordinates. 232 * 233 * Returns true if quick-rejected 234 */ 235 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 236 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 237 void setupMergedMultiDraw(const Rect* clipRect); 238 isCurrentTransformSimple()239 bool isCurrentTransformSimple() { 240 return currentTransform()->isSimple(); 241 } 242 getCaches()243 Caches& getCaches() { 244 return mCaches; 245 } 246 renderState()247 RenderState& renderState() { 248 return mRenderState; 249 } 250 getViewportWidth()251 int getViewportWidth() { return mState.getViewportWidth(); } getViewportHeight()252 int getViewportHeight() { return mState.getViewportHeight(); } 253 254 /** 255 * Scales the alpha on the current snapshot. This alpha value will be modulated 256 * with other alpha values when drawing primitives. 257 */ scaleAlpha(float alpha)258 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 259 260 /** 261 * Inserts a named event marker in the stream of GL commands. 262 */ 263 void eventMark(const char* name) const; 264 265 /** 266 * Inserts a formatted event marker in the stream of GL commands. 267 */ 268 void eventMarkDEBUG(const char *fmt, ...) const; 269 270 /** 271 * Inserts a named group marker in the stream of GL commands. This marker 272 * can be used by tools to group commands into logical groups. A call to 273 * this method must always be followed later on by a call to endMark(). 274 */ 275 void startMark(const char* name) const; 276 277 /** 278 * Closes the last group marker opened by startMark(). 279 */ 280 void endMark() const; 281 282 /** 283 * Gets the alpha and xfermode out of a paint object. If the paint is null 284 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 285 * not multiply the paint's alpha by the current snapshot's alpha, and does 286 * not replace the alpha with the overrideLayerAlpha 287 * 288 * @param paint The paint to extract values from 289 * @param alpha Where to store the resulting alpha 290 * @param mode Where to store the resulting xfermode 291 */ getAlphaAndModeDirect(const SkPaint * paint,int * alpha,SkXfermode::Mode * mode)292 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 293 SkXfermode::Mode* mode) { 294 *mode = getXfermodeDirect(paint); 295 *alpha = getAlphaDirect(paint); 296 } 297 getXfermodeDirect(const SkPaint * paint)298 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 299 if (!paint) return SkXfermode::kSrcOver_Mode; 300 return PaintUtils::getXfermode(paint->getXfermode()); 301 } 302 getAlphaDirect(const SkPaint * paint)303 static inline int getAlphaDirect(const SkPaint* paint) { 304 if (!paint) return 255; 305 return paint->getAlpha(); 306 } 307 308 struct TextShadow { 309 SkScalar radius; 310 float dx; 311 float dy; 312 SkColor color; 313 }; 314 getTextShadow(const SkPaint * paint,TextShadow * textShadow)315 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 316 SkDrawLooper::BlurShadowRec blur; 317 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 318 if (textShadow) { 319 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 320 textShadow->dx = blur.fOffset.fX; 321 textShadow->dy = blur.fOffset.fY; 322 textShadow->color = blur.fColor; 323 } 324 return true; 325 } 326 return false; 327 } 328 hasTextShadow(const SkPaint * paint)329 static inline bool hasTextShadow(const SkPaint* paint) { 330 return getTextShadow(paint, nullptr); 331 } 332 333 /** 334 * Build the best transform to use to rasterize text given a full 335 * transform matrix, and whether filteration is needed. 336 * 337 * Returns whether filtration is needed 338 */ 339 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 340 341 #if DEBUG_MERGE_BEHAVIOR drawScreenSpaceColorRect(float left,float top,float right,float bottom,int color)342 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 343 mCaches.setScissorEnabled(false); 344 345 // should only be called outside of other draw ops, so stencil can only be in test state 346 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 347 mCaches.stencil.disable(); 348 349 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 350 351 if (stencilWasEnabled) mCaches.stencil.enableTest(); 352 mDirty = true; 353 } 354 #endif 355 getLightCenter()356 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } getLightRadius()357 float getLightRadius() const { return mLightRadius; } getAmbientShadowAlpha()358 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } getSpotShadowAlpha()359 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 360 361 /////////////////////////////////////////////////////////////////// 362 /// State manipulation 363 364 int getSaveCount() const; 365 int save(int flags); 366 void restore(); 367 void restoreToCount(int saveCount); 368 getMatrix(SkMatrix * outMatrix)369 void getMatrix(SkMatrix* outMatrix) const { mState.getMatrix(outMatrix); } setMatrix(const SkMatrix & matrix)370 void setMatrix(const SkMatrix& matrix) { mState.setMatrix(matrix); } 371 void setLocalMatrix(const SkMatrix& matrix); concatMatrix(const SkMatrix & matrix)372 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 373 374 void translate(float dx, float dy, float dz = 0.0f); 375 void rotate(float degrees); 376 void scale(float sx, float sy); 377 void skew(float sx, float sy); 378 379 void setMatrix(const Matrix4& matrix); // internal only convenience method 380 void concatMatrix(const Matrix4& matrix); // internal only convenience method 381 getLocalClipBounds()382 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } getRenderTargetClipBounds()383 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } quickRejectConservative(float left,float top,float right,float bottom)384 bool quickRejectConservative(float left, float top, 385 float right, float bottom) const { 386 return mState.quickRejectConservative(left, top, right, bottom); 387 } 388 389 bool clipRect(float left, float top, 390 float right, float bottom, SkRegion::Op op); 391 bool clipPath(const SkPath* path, SkRegion::Op op); 392 bool clipRegion(const SkRegion* region, SkRegion::Op op); 393 394 /** 395 * Does not support different clipping Ops (that is, every call to setClippingOutline is 396 * effectively using SkRegion::kReplaceOp) 397 * 398 * The clipping outline is independent from the regular clip. 399 */ 400 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 401 void setClippingRoundRect(LinearAllocator& allocator, 402 const Rect& rect, float radius, bool highPriority = true); 403 void setProjectionPathMask(LinearAllocator& allocator, const SkPath* path); 404 hasRectToRectTransform()405 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } currentTransform()406 inline const mat4* currentTransform() const { return mState.currentTransform(); } 407 408 /////////////////////////////////////////////////////////////////// 409 /// CanvasStateClient interface 410 411 virtual void onViewportInitialized() override; 412 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; getTargetFbo()413 virtual GLuint getTargetFbo() const override { return 0; } 414 allocPathForFrame()415 SkPath* allocPathForFrame() { 416 std::unique_ptr<SkPath> path(new SkPath()); 417 SkPath* returnPath = path.get(); 418 mTempPaths.push_back(std::move(path)); 419 return returnPath; 420 } 421 setBaseTransform(const Matrix4 & matrix)422 void setBaseTransform(const Matrix4& matrix) { mBaseTransform = matrix; } 423 424 protected: 425 /** 426 * Perform the setup specific to a frame. This method does not 427 * issue any OpenGL commands. 428 */ 429 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 430 431 /** 432 * Indicates the start of rendering. This method will setup the 433 * initial OpenGL state (viewport, clearing the buffer, etc.) 434 */ 435 void startFrame(); 436 437 /** 438 * Clears the underlying surface if needed. 439 */ 440 virtual void clear(float left, float top, float right, float bottom, bool opaque); 441 442 /** 443 * Call this method after updating a layer during a drawing pass. 444 */ 445 void resumeAfterLayer(); 446 447 /** 448 * This method is called whenever a stencil buffer is required. Subclasses 449 * should override this method and call attachStencilBufferToLayer() on the 450 * appropriate layer(s). 451 */ 452 virtual void ensureStencilBuffer(); 453 454 /** 455 * Obtains a stencil render buffer (allocating it if necessary) and 456 * attaches it to the specified layer. 457 */ 458 void attachStencilBufferToLayer(Layer* layer); 459 460 /** 461 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 462 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 463 * in the list. 464 */ 465 void drawRectangleList(const RectangleList& rectangleList); 466 467 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 468 const SkPaint* paint = nullptr); 469 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 470 return quickRejectSetupScissor(bounds.left, bounds.top, 471 bounds.right, bounds.bottom, paint); 472 } 473 474 /** 475 * Compose the layer defined in the current snapshot with the layer 476 * defined by the previous snapshot. 477 * 478 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 479 * 480 * @param curent The current snapshot containing the layer to compose 481 * @param previous The previous snapshot to compose the current layer with 482 */ 483 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 484 485 /** 486 * Marks the specified region as dirty at the specified bounds. 487 */ 488 void dirtyLayerUnchecked(Rect& bounds, Region* region); 489 490 /** 491 * Returns the region of the current layer. 492 */ getRegion()493 virtual Region* getRegion() const { 494 return mState.currentRegion(); 495 } 496 497 /** 498 * Indicates whether rendering is currently targeted at a layer. 499 */ hasLayer()500 virtual bool hasLayer() const { 501 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 502 } 503 504 /** 505 * Renders the specified layer as a textured quad. 506 * 507 * @param layer The layer to render 508 * @param rect The bounds of the layer 509 */ 510 void drawTextureLayer(Layer* layer, const Rect& rect); 511 512 /** 513 * Gets the alpha and xfermode out of a paint object. If the paint is null 514 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for snapshot alpha. 515 * 516 * @param paint The paint to extract values from 517 * @param alpha Where to store the resulting alpha 518 * @param mode Where to store the resulting xfermode 519 */ 520 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 521 522 /** 523 * Gets the alpha from a layer, accounting for snapshot alpha 524 * 525 * @param layer The layer from which the alpha is extracted 526 */ 527 inline float getLayerAlpha(const Layer* layer) const; 528 529 /** 530 * Set to true to suppress error checks at the end of a frame. 531 */ suppressErrorChecks()532 virtual bool suppressErrorChecks() const { 533 return false; 534 } 535 536 CanvasState mState; 537 Caches& mCaches; 538 RenderState& mRenderState; 539 540 private: 541 enum class GlopRenderType { 542 Standard, 543 Multi, 544 LayerClear 545 }; 546 547 void renderGlop(const Glop& glop, GlopRenderType type = GlopRenderType::Standard); 548 549 /** 550 * Discards the content of the framebuffer if supported by the driver. 551 * This method should be called at the beginning of a frame to optimize 552 * rendering on some tiler architectures. 553 */ 554 void discardFramebuffer(float left, float top, float right, float bottom); 555 556 /** 557 * Tells the GPU what part of the screen is about to be redrawn. 558 * This method will use the current layer space clip rect. 559 * This method needs to be invoked every time getTargetFbo() is 560 * bound again. 561 */ 562 void startTilingCurrentClip(bool opaque = false, bool expand = false); 563 564 /** 565 * Tells the GPU what part of the screen is about to be redrawn. 566 * This method needs to be invoked every time getTargetFbo() is 567 * bound again. 568 */ 569 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 570 571 /** 572 * Tells the GPU that we are done drawing the frame or that we 573 * are switching to another render target. 574 */ 575 void endTiling(); 576 577 /** 578 * Sets the clipping rectangle using glScissor. The clip is defined by 579 * the current snapshot's clipRect member. 580 */ 581 void setScissorFromClip(); 582 583 /** 584 * Sets the clipping region using the stencil buffer. The clip region 585 * is defined by the current snapshot's clipRegion member. 586 */ 587 void setStencilFromClip(); 588 589 /** 590 * Given the local bounds of the layer, calculates ... 591 */ 592 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 593 594 /** 595 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 596 */ 597 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 598 bool fboLayer, int alpha); 599 600 /** 601 * Creates a new layer stored in the specified snapshot. 602 * 603 * @param snapshot The snapshot associated with the new layer 604 * @param left The left coordinate of the layer 605 * @param top The top coordinate of the layer 606 * @param right The right coordinate of the layer 607 * @param bottom The bottom coordinate of the layer 608 * @param alpha The translucency of the layer 609 * @param mode The blending mode of the layer 610 * @param flags The layer save flags 611 * @param mask A mask to use when drawing the layer back, may be empty 612 * 613 * @return True if the layer was successfully created, false otherwise 614 */ 615 bool createLayer(float left, float top, float right, float bottom, 616 const SkPaint* paint, int flags, const SkPath* convexMask); 617 618 /** 619 * Creates a new layer stored in the specified snapshot as an FBO. 620 * 621 * @param layer The layer to store as an FBO 622 * @param snapshot The snapshot associated with the new layer 623 * @param bounds The bounds of the layer 624 */ 625 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 626 627 /** 628 * Compose the specified layer as a region. 629 * 630 * @param layer The layer to compose 631 * @param rect The layer's bounds 632 */ 633 void composeLayerRegion(Layer* layer, const Rect& rect); 634 635 /** 636 * Restores the content in layer to the screen, swapping the blend mode, 637 * specifically used in the restore() of a saveLayerAlpha(). 638 * 639 * This allows e.g. a layer that would have been drawn on top of existing content (with SrcOver) 640 * to be drawn underneath. 641 * 642 * This will always ignore the canvas transform. 643 */ 644 void composeLayerRectSwapped(Layer* layer, const Rect& rect); 645 646 /** 647 * Draws the content in layer to the screen. 648 */ 649 void composeLayerRect(Layer* layer, const Rect& rect); 650 651 /** 652 * Clears all the regions corresponding to the current list of layers. 653 * This method MUST be invoked before any drawing operation. 654 */ 655 void clearLayerRegions(); 656 657 /** 658 * Mark the layer as dirty at the specified coordinates. The coordinates 659 * are transformed with the supplied matrix. 660 */ 661 void dirtyLayer(const float left, const float top, 662 const float right, const float bottom, const Matrix4& transform); 663 664 /** 665 * Mark the layer as dirty at the specified coordinates. 666 */ 667 void dirtyLayer(const float left, const float top, 668 const float right, const float bottom); 669 670 /** 671 * Draws a colored rectangle with the specified color. The specified coordinates 672 * are transformed by the current snapshot's transform matrix unless specified 673 * otherwise. 674 * 675 * @param left The left coordinate of the rectangle 676 * @param top The top coordinate of the rectangle 677 * @param right The right coordinate of the rectangle 678 * @param bottom The bottom coordinate of the rectangle 679 * @param paint The paint containing the color, blending mode, etc. 680 * @param ignoreTransform True if the current transform should be ignored 681 */ 682 void drawColorRect(float left, float top, float right, float bottom, 683 const SkPaint* paint, bool ignoreTransform = false); 684 685 /** 686 * Draws a series of colored rectangles with the specified color. The specified 687 * coordinates are transformed by the current snapshot's transform matrix unless 688 * specified otherwise. 689 * 690 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 691 * per rectangle 692 * @param paint The paint containing the color, blending mode, etc. 693 * @param ignoreTransform True if the current transform should be ignored 694 * @param dirty True if calling this method should dirty the current layer 695 * @param clip True if the rects should be clipped, false otherwise 696 */ 697 void drawColorRects(const float* rects, int count, const SkPaint* paint, 698 bool ignoreTransform = false, bool dirty = true, bool clip = true); 699 700 /** 701 * Draws the shape represented by the specified path texture. 702 * This method invokes drawPathTexture() but takes into account 703 * the extra left/top offset and the texture offset to correctly 704 * position the final shape. 705 * 706 * @param left The left coordinate of the shape to render 707 * @param top The top coordinate of the shape to render 708 * @param texture The texture reprsenting the shape 709 * @param paint The paint to draw the shape with 710 */ 711 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 712 713 /** 714 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 715 * 716 * @param vertexBuffer The VertexBuffer to be drawn 717 * @param paint The paint to render with 718 * @param flags flags with which to draw 719 */ 720 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 721 const SkPaint* paint, int flags = 0); 722 723 /** 724 * Convenience for translating method 725 */ 726 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 727 const SkPaint* paint, int flags = 0) { 728 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 729 } 730 731 /** 732 * Renders the convex hull defined by the specified path as a strip of polygons. 733 * 734 * @param path The hull of the path to draw 735 * @param paint The paint to render with 736 */ 737 void drawConvexPath(const SkPath& path, const SkPaint* paint); 738 739 /** 740 * Draws text underline and strike-through if needed. 741 * 742 * @param text The text to decor 743 * @param bytesCount The number of bytes in the text 744 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 745 * @param x The x coordinate where the text will be drawn 746 * @param y The y coordinate where the text will be drawn 747 * @param paint The paint to draw the text with 748 */ 749 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 750 751 /** 752 * Draws shadow layer on text (with optional positions). 753 * 754 * @param paint The paint to draw the shadow with 755 * @param text The text to draw 756 * @param bytesCount The number of bytes in the text 757 * @param count The number of glyphs in the text 758 * @param positions The x, y positions of individual glyphs (or NULL) 759 * @param fontRenderer The font renderer object 760 * @param alpha The alpha value for drawing the shadow 761 * @param x The x coordinate where the shadow will be drawn 762 * @param y The y coordinate where the shadow will be drawn 763 */ 764 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 765 const float* positions, FontRenderer& fontRenderer, int alpha, 766 float x, float y); 767 768 /** 769 * Draws a path texture. Path textures are alpha8 bitmaps that need special 770 * compositing to apply colors/filters/etc. 771 * 772 * @param texture The texture to render 773 * @param x The x coordinate where the texture will be drawn 774 * @param y The y coordinate where the texture will be drawn 775 * @param paint The paint to draw the texture with 776 */ 777 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 778 779 /** 780 * Resets the texture coordinates stored in mMeshVertices. Setting the values 781 * back to default is achieved by calling: 782 * 783 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 784 * 785 * @param u1 The left coordinate of the texture 786 * @param v1 The bottom coordinate of the texture 787 * @param u2 The right coordinate of the texture 788 * @param v2 The top coordinate of the texture 789 */ 790 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 791 792 /** 793 * Returns true if the specified paint will draw invisible text. 794 */ 795 bool canSkipText(const SkPaint* paint) const; 796 797 bool updateLayer(Layer* layer, bool inFrame); 798 void updateLayers(); 799 void flushLayers(); 800 801 #if DEBUG_LAYERS_AS_REGIONS 802 /** 803 * Renders the specified region as a series of rectangles. This method 804 * is used for debugging only. 805 */ 806 void drawRegionRectsDebug(const Region& region); 807 #endif 808 809 /** 810 * Renders the specified region as a series of rectangles. The region 811 * must be in screen-space coordinates. 812 */ 813 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 814 815 /** 816 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 817 * is turned on. 818 */ 819 void debugClip(); 820 821 void debugOverdraw(bool enable, bool clear); 822 void renderOverdraw(); 823 void countOverdraw(); 824 825 /** 826 * Should be invoked every time the glScissor is modified. 827 */ dirtyClip()828 inline void dirtyClip() { mState.setDirtyClip(true); } 829 getMapper(const Texture * texture)830 inline const UvMapper& getMapper(const Texture* texture) { 831 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 832 } 833 834 /** 835 * Returns a texture object for the specified bitmap. The texture can 836 * come from the texture cache or an atlas. If this method returns 837 * NULL, the texture could not be found and/or allocated. 838 */ 839 Texture* getTexture(const SkBitmap* bitmap); 840 reportAndClearDirty()841 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } writableSnapshot()842 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } currentSnapshot()843 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 844 845 // State used to define the clipping region 846 Rect mTilingClip; 847 // Is the target render surface opaque 848 bool mOpaque; 849 // Is a frame currently being rendered 850 bool mFrameStarted; 851 852 // Default UV mapper 853 const UvMapper mUvMapper; 854 855 // List of rectangles to clear after saveLayer() is invoked 856 std::vector<Rect> mLayers; 857 // List of layers to update at the beginning of a frame 858 Vector< sp<Layer> > mLayerUpdates; 859 860 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 861 // Properties.h 862 bool mScissorOptimizationDisabled; 863 864 // No-ops start/endTiling when set 865 bool mSuppressTiling; 866 bool mFirstFrameAfterResize; 867 868 bool mSkipOutlineClip; 869 870 // True if anything has been drawn since the last call to 871 // reportAndClearDirty() 872 bool mDirty; 873 874 // Lighting + shadows 875 Vector3 mLightCenter; 876 float mLightRadius; 877 uint8_t mAmbientShadowAlpha; 878 uint8_t mSpotShadowAlpha; 879 880 // Paths kept alive for the duration of the frame 881 std::vector<std::unique_ptr<SkPath>> mTempPaths; 882 883 /** 884 * Initial transform for a rendering pass; transform from global device 885 * coordinates to the current RenderNode's drawing content coordinates, 886 * with the RenderNode's RenderProperty transforms already applied. 887 * Calling setMatrix(mBaseTransform) will result in drawing at the origin 888 * of the DisplayList's recorded surface prior to any Canvas 889 * transformation. 890 */ 891 Matrix4 mBaseTransform; 892 893 friend class Layer; 894 friend class TextDrawFunctor; 895 friend class DrawBitmapOp; 896 friend class DrawPatchOp; 897 898 }; // class OpenGLRenderer 899 900 }; // namespace uirenderer 901 }; // namespace android 902 903 #endif // ANDROID_HWUI_OPENGL_RENDERER_H 904