OpenGLRenderer.h revision 87f9c42f5411d1b00f9babe7873b8200c3a25e60
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 48#include <cutils/compiler.h> 49 50#include <androidfw/ResourceTypes.h> 51 52#include <vector> 53 54class SkShader; 55 56namespace android { 57namespace uirenderer { 58 59enum class DrawOpMode { 60 kImmediate, 61 kDefer, 62 kFlush 63}; 64 65class DeferredDisplayState; 66struct Glop; 67class RenderState; 68class RenderNode; 69class TextDrawFunctor; 70class VertexBuffer; 71 72enum StateDeferFlags { 73 kStateDeferFlag_Draw = 0x1, 74 kStateDeferFlag_Clip = 0x2 75}; 76 77enum ClipSideFlags { 78 kClipSide_None = 0x0, 79 kClipSide_Left = 0x1, 80 kClipSide_Top = 0x2, 81 kClipSide_Right = 0x4, 82 kClipSide_Bottom = 0x8, 83 kClipSide_Full = 0xF, 84 kClipSide_ConservativeFull = 0x1F 85}; 86 87enum VertexBufferDisplayFlags { 88 kVertexBuffer_Offset = 0x1, 89 kVertexBuffer_ShadowInterp = 0x2, 90}; 91 92/** 93 * Defines additional transformation that should be applied by the model view matrix, beyond that of 94 * the currentTransform() 95 */ 96enum ModelViewMode { 97 /** 98 * Used when the model view should simply translate geometry passed to the shader. The resulting 99 * matrix will be a simple translation. 100 */ 101 kModelViewMode_Translate = 0, 102 103 /** 104 * Used when the model view should translate and scale geometry. The resulting matrix will be a 105 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 106 */ 107 kModelViewMode_TranslateAndScale = 1, 108}; 109 110/////////////////////////////////////////////////////////////////////////////// 111// Renderer 112/////////////////////////////////////////////////////////////////////////////// 113/** 114 * OpenGL Renderer implementation. 115 */ 116class OpenGLRenderer : public CanvasStateClient { 117public: 118 OpenGLRenderer(RenderState& renderState); 119 virtual ~OpenGLRenderer(); 120 121 /** 122 * Sets the dimension of the underlying drawing surface. This method must 123 * be called at least once every time the drawing surface changes size. 124 * 125 * @param width The width in pixels of the underlysing surface 126 * @param height The height in pixels of the underlysing surface 127 */ 128 void setViewport(int width, int height) { mState.setViewport(width, height); } 129 130 void initProperties(); 131 void initLight(float lightRadius, uint8_t ambientShadowAlpha, 132 uint8_t spotShadowAlpha); 133 void setLightCenter(const Vector3& lightCenter); 134 135 /* 136 * Prepares the renderer to draw a frame. This method must be invoked 137 * at the beginning of each frame. Only the specified rectangle of the 138 * frame is assumed to be dirty. A clip will automatically be set to 139 * the specified rectangle. 140 * 141 * @param opaque If true, the target surface is considered opaque 142 * and will not be cleared. If false, the target surface 143 * will be cleared 144 */ 145 virtual void prepareDirty(float left, float top, float right, float bottom, 146 bool opaque); 147 148 /** 149 * Prepares the renderer to draw a frame. This method must be invoked 150 * at the beginning of each frame. When this method is invoked, the 151 * entire drawing surface is assumed to be redrawn. 152 * 153 * @param opaque If true, the target surface is considered opaque 154 * and will not be cleared. If false, the target surface 155 * will be cleared 156 */ 157 void prepare(bool opaque) { 158 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 159 } 160 161 /** 162 * Indicates the end of a frame. This method must be invoked whenever 163 * the caller is done rendering a frame. 164 * Returns true if any drawing was done during the frame (the output 165 * has changed / is "dirty" and should be displayed to the user). 166 */ 167 virtual bool finish(); 168 169 void callDrawGLFunction(Functor* functor, Rect& dirty); 170 171 void pushLayerUpdate(Layer* layer); 172 void cancelLayerUpdate(Layer* layer); 173 void flushLayerUpdates(); 174 void markLayersAsBuildLayers(); 175 176 virtual int saveLayer(float left, float top, float right, float bottom, 177 const SkPaint* paint, int flags) { 178 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 179 } 180 181 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 182 // created, which will in turn clip to that mask when drawn back/restored. 183 int saveLayer(float left, float top, float right, float bottom, 184 const SkPaint* paint, int flags, const SkPath* convexMask); 185 186 int saveLayerDeferred(float left, float top, float right, float bottom, 187 const SkPaint* paint, int flags); 188 189 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 190 void drawLayer(Layer* layer); 191 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 192 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 193 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 194 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 195 const SkPaint* paint); 196 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 197 const float* vertices, const int* colors, const SkPaint* paint); 198 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 199 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 200 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 201 float left, float top, float right, float bottom, const SkPaint* paint); 202 void drawColor(int color, SkXfermode::Mode mode); 203 void drawRect(float left, float top, float right, float bottom, 204 const SkPaint* paint); 205 void drawRoundRect(float left, float top, float right, float bottom, 206 float rx, float ry, const SkPaint* paint); 207 void drawCircle(float x, float y, float radius, const SkPaint* paint); 208 void drawOval(float left, float top, float right, float bottom, 209 const SkPaint* paint); 210 void drawArc(float left, float top, float right, float bottom, 211 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 212 void drawPath(const SkPath* path, const SkPaint* paint); 213 void drawLines(const float* points, int count, const SkPaint* paint); 214 void drawPoints(const float* points, int count, const SkPaint* paint); 215 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 216 float hOffset, float vOffset, const SkPaint* paint); 217 void drawPosText(const char* text, int bytesCount, int count, 218 const float* positions, const SkPaint* paint); 219 void drawText(const char* text, int bytesCount, int count, float x, float y, 220 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 221 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 222 void drawRects(const float* rects, int count, const SkPaint* paint); 223 224 void drawShadow(float casterAlpha, 225 const VertexBuffer* ambientShadowVertexBuffer, 226 const VertexBuffer* spotShadowVertexBuffer); 227 228 void setDrawFilter(SkDrawFilter* filter); 229 230 /** 231 * Store the current display state (most importantly, the current clip and transform), and 232 * additionally map the state's bounds from local to window coordinates. 233 * 234 * Returns true if quick-rejected 235 */ 236 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 237 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 238 void setupMergedMultiDraw(const Rect* clipRect); 239 240 bool isCurrentTransformSimple() { 241 return currentTransform()->isSimple(); 242 } 243 244 Caches& getCaches() { 245 return mCaches; 246 } 247 248 RenderState& renderState() { 249 return mRenderState; 250 } 251 252 int getViewportWidth() { return mState.getViewportWidth(); } 253 int getViewportHeight() { return mState.getViewportHeight(); } 254 255 /** 256 * Scales the alpha on the current snapshot. This alpha value will be modulated 257 * with other alpha values when drawing primitives. 258 */ 259 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 260 261 /** 262 * Inserts a named event marker in the stream of GL commands. 263 */ 264 void eventMark(const char* name) const; 265 266 /** 267 * Inserts a formatted event marker in the stream of GL commands. 268 */ 269 void eventMarkDEBUG(const char *fmt, ...) const; 270 271 /** 272 * Inserts a named group marker in the stream of GL commands. This marker 273 * can be used by tools to group commands into logical groups. A call to 274 * this method must always be followed later on by a call to endMark(). 275 */ 276 void startMark(const char* name) const; 277 278 /** 279 * Closes the last group marker opened by startMark(). 280 */ 281 void endMark() const; 282 283 /** 284 * Gets the alpha and xfermode out of a paint object. If the paint is null 285 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 286 * not multiply the paint's alpha by the current snapshot's alpha, and does 287 * not replace the alpha with the overrideLayerAlpha 288 * 289 * @param paint The paint to extract values from 290 * @param alpha Where to store the resulting alpha 291 * @param mode Where to store the resulting xfermode 292 */ 293 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 294 SkXfermode::Mode* mode) { 295 *mode = getXfermodeDirect(paint); 296 *alpha = getAlphaDirect(paint); 297 } 298 299 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 300 if (!paint) return SkXfermode::kSrcOver_Mode; 301 return PaintUtils::getXfermode(paint->getXfermode()); 302 } 303 304 static inline int getAlphaDirect(const SkPaint* paint) { 305 if (!paint) return 255; 306 return paint->getAlpha(); 307 } 308 309 struct TextShadow { 310 SkScalar radius; 311 float dx; 312 float dy; 313 SkColor color; 314 }; 315 316 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 317 SkDrawLooper::BlurShadowRec blur; 318 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 319 if (textShadow) { 320 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 321 textShadow->dx = blur.fOffset.fX; 322 textShadow->dy = blur.fOffset.fY; 323 textShadow->color = blur.fColor; 324 } 325 return true; 326 } 327 return false; 328 } 329 330 static inline bool hasTextShadow(const SkPaint* paint) { 331 return getTextShadow(paint, nullptr); 332 } 333 334 /** 335 * Build the best transform to use to rasterize text given a full 336 * transform matrix, and whether filteration is needed. 337 * 338 * Returns whether filtration is needed 339 */ 340 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 341 342#if DEBUG_MERGE_BEHAVIOR 343 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 344 mCaches.setScissorEnabled(false); 345 346 // should only be called outside of other draw ops, so stencil can only be in test state 347 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 348 mCaches.stencil.disable(); 349 350 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 351 352 if (stencilWasEnabled) mCaches.stencil.enableTest(); 353 mDirty = true; 354 } 355#endif 356 357 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 358 float getLightRadius() const { return mLightRadius; } 359 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 360 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 361 362 /////////////////////////////////////////////////////////////////// 363 /// State manipulation 364 365 int getSaveCount() const; 366 int save(int flags); 367 void restore(); 368 void restoreToCount(int saveCount); 369 370 void setGlobalMatrix(const Matrix4& matrix) { 371 mState.setMatrix(matrix); 372 } 373 void setLocalMatrix(const Matrix4& matrix); 374 void setLocalMatrix(const SkMatrix& matrix); 375 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 376 377 void translate(float dx, float dy, float dz = 0.0f); 378 void rotate(float degrees); 379 void scale(float sx, float sy); 380 void skew(float sx, float sy); 381 382 void setMatrix(const Matrix4& matrix); // internal only convenience method 383 void concatMatrix(const Matrix4& matrix); // internal only convenience method 384 385 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } 386 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 387 bool quickRejectConservative(float left, float top, 388 float right, float bottom) const { 389 return mState.quickRejectConservative(left, top, right, bottom); 390 } 391 392 bool clipRect(float left, float top, 393 float right, float bottom, SkRegion::Op op); 394 bool clipPath(const SkPath* path, SkRegion::Op op); 395 bool clipRegion(const SkRegion* region, SkRegion::Op op); 396 397 /** 398 * Does not support different clipping Ops (that is, every call to setClippingOutline is 399 * effectively using SkRegion::kReplaceOp) 400 * 401 * The clipping outline is independent from the regular clip. 402 */ 403 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 404 void setClippingRoundRect(LinearAllocator& allocator, 405 const Rect& rect, float radius, bool highPriority = true); 406 void setProjectionPathMask(LinearAllocator& allocator, const SkPath* path); 407 408 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 409 inline const mat4* currentTransform() const { return mState.currentTransform(); } 410 411 /////////////////////////////////////////////////////////////////// 412 /// CanvasStateClient interface 413 414 virtual void onViewportInitialized() override; 415 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 416 virtual GLuint getTargetFbo() const override { return 0; } 417 418 SkPath* allocPathForFrame() { 419 std::unique_ptr<SkPath> path(new SkPath()); 420 SkPath* returnPath = path.get(); 421 mTempPaths.push_back(std::move(path)); 422 return returnPath; 423 } 424 425 void setBaseTransform(const Matrix4& matrix) { mBaseTransform = matrix; } 426 427protected: 428 /** 429 * Perform the setup specific to a frame. This method does not 430 * issue any OpenGL commands. 431 */ 432 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 433 434 /** 435 * Indicates the start of rendering. This method will setup the 436 * initial OpenGL state (viewport, clearing the buffer, etc.) 437 */ 438 void startFrame(); 439 440 /** 441 * Clears the underlying surface if needed. 442 */ 443 virtual void clear(float left, float top, float right, float bottom, bool opaque); 444 445 /** 446 * Call this method after updating a layer during a drawing pass. 447 */ 448 void resumeAfterLayer(); 449 450 /** 451 * This method is called whenever a stencil buffer is required. Subclasses 452 * should override this method and call attachStencilBufferToLayer() on the 453 * appropriate layer(s). 454 */ 455 virtual void ensureStencilBuffer(); 456 457 /** 458 * Obtains a stencil render buffer (allocating it if necessary) and 459 * attaches it to the specified layer. 460 */ 461 void attachStencilBufferToLayer(Layer* layer); 462 463 /** 464 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 465 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 466 * in the list. 467 */ 468 void drawRectangleList(const RectangleList& rectangleList); 469 470 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 471 const SkPaint* paint = nullptr); 472 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 473 return quickRejectSetupScissor(bounds.left, bounds.top, 474 bounds.right, bounds.bottom, paint); 475 } 476 477 /** 478 * Compose the layer defined in the current snapshot with the layer 479 * defined by the previous snapshot. 480 * 481 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 482 * 483 * @param curent The current snapshot containing the layer to compose 484 * @param previous The previous snapshot to compose the current layer with 485 */ 486 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 487 488 /** 489 * Marks the specified region as dirty at the specified bounds. 490 */ 491 void dirtyLayerUnchecked(Rect& bounds, Region* region); 492 493 /** 494 * Returns the region of the current layer. 495 */ 496 virtual Region* getRegion() const { 497 return mState.currentRegion(); 498 } 499 500 /** 501 * Indicates whether rendering is currently targeted at a layer. 502 */ 503 virtual bool hasLayer() const { 504 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 505 } 506 507 /** 508 * Renders the specified layer as a textured quad. 509 * 510 * @param layer The layer to render 511 * @param rect The bounds of the layer 512 */ 513 void drawTextureLayer(Layer* layer, const Rect& rect); 514 515 /** 516 * Gets the alpha and xfermode out of a paint object. If the paint is null 517 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for snapshot alpha. 518 * 519 * @param paint The paint to extract values from 520 * @param alpha Where to store the resulting alpha 521 * @param mode Where to store the resulting xfermode 522 */ 523 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 524 525 /** 526 * Gets the alpha from a layer, accounting for snapshot alpha 527 * 528 * @param layer The layer from which the alpha is extracted 529 */ 530 inline float getLayerAlpha(const Layer* layer) const; 531 532 /** 533 * Set to true to suppress error checks at the end of a frame. 534 */ 535 virtual bool suppressErrorChecks() const { 536 return false; 537 } 538 539 CanvasState mState; 540 Caches& mCaches; 541 RenderState& mRenderState; 542 543private: 544 enum class GlopRenderType { 545 Standard, 546 Multi, 547 LayerClear 548 }; 549 550 void renderGlop(const Glop& glop, GlopRenderType type = GlopRenderType::Standard); 551 552 /** 553 * Discards the content of the framebuffer if supported by the driver. 554 * This method should be called at the beginning of a frame to optimize 555 * rendering on some tiler architectures. 556 */ 557 void discardFramebuffer(float left, float top, float right, float bottom); 558 559 /** 560 * Sets the clipping rectangle using glScissor. The clip is defined by 561 * the current snapshot's clipRect member. 562 */ 563 void setScissorFromClip(); 564 565 /** 566 * Sets the clipping region using the stencil buffer. The clip region 567 * is defined by the current snapshot's clipRegion member. 568 */ 569 void setStencilFromClip(); 570 571 /** 572 * Given the local bounds of the layer, calculates ... 573 */ 574 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 575 576 /** 577 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 578 */ 579 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 580 bool fboLayer, int alpha); 581 582 /** 583 * Creates a new layer stored in the specified snapshot. 584 * 585 * @param snapshot The snapshot associated with the new layer 586 * @param left The left coordinate of the layer 587 * @param top The top coordinate of the layer 588 * @param right The right coordinate of the layer 589 * @param bottom The bottom coordinate of the layer 590 * @param alpha The translucency of the layer 591 * @param mode The blending mode of the layer 592 * @param flags The layer save flags 593 * @param mask A mask to use when drawing the layer back, may be empty 594 * 595 * @return True if the layer was successfully created, false otherwise 596 */ 597 bool createLayer(float left, float top, float right, float bottom, 598 const SkPaint* paint, int flags, const SkPath* convexMask); 599 600 /** 601 * Creates a new layer stored in the specified snapshot as an FBO. 602 * 603 * @param layer The layer to store as an FBO 604 * @param snapshot The snapshot associated with the new layer 605 * @param bounds The bounds of the layer 606 */ 607 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 608 609 /** 610 * Compose the specified layer as a region. 611 * 612 * @param layer The layer to compose 613 * @param rect The layer's bounds 614 */ 615 void composeLayerRegion(Layer* layer, const Rect& rect); 616 617 /** 618 * Restores the content in layer to the screen, swapping the blend mode, 619 * specifically used in the restore() of a saveLayerAlpha(). 620 * 621 * This allows e.g. a layer that would have been drawn on top of existing content (with SrcOver) 622 * to be drawn underneath. 623 * 624 * This will always ignore the canvas transform. 625 */ 626 void composeLayerRectSwapped(Layer* layer, const Rect& rect); 627 628 /** 629 * Draws the content in layer to the screen. 630 */ 631 void composeLayerRect(Layer* layer, const Rect& rect); 632 633 /** 634 * Clears all the regions corresponding to the current list of layers. 635 * This method MUST be invoked before any drawing operation. 636 */ 637 void clearLayerRegions(); 638 639 /** 640 * Mark the layer as dirty at the specified coordinates. The coordinates 641 * are transformed with the supplied matrix. 642 */ 643 void dirtyLayer(const float left, const float top, 644 const float right, const float bottom, const Matrix4& transform); 645 646 /** 647 * Mark the layer as dirty at the specified coordinates. 648 */ 649 void dirtyLayer(const float left, const float top, 650 const float right, const float bottom); 651 652 /** 653 * Draws a colored rectangle with the specified color. The specified coordinates 654 * are transformed by the current snapshot's transform matrix unless specified 655 * otherwise. 656 * 657 * @param left The left coordinate of the rectangle 658 * @param top The top coordinate of the rectangle 659 * @param right The right coordinate of the rectangle 660 * @param bottom The bottom coordinate of the rectangle 661 * @param paint The paint containing the color, blending mode, etc. 662 * @param ignoreTransform True if the current transform should be ignored 663 */ 664 void drawColorRect(float left, float top, float right, float bottom, 665 const SkPaint* paint, bool ignoreTransform = false); 666 667 /** 668 * Draws a series of colored rectangles with the specified color. The specified 669 * coordinates are transformed by the current snapshot's transform matrix unless 670 * specified otherwise. 671 * 672 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 673 * per rectangle 674 * @param paint The paint containing the color, blending mode, etc. 675 * @param ignoreTransform True if the current transform should be ignored 676 * @param dirty True if calling this method should dirty the current layer 677 * @param clip True if the rects should be clipped, false otherwise 678 */ 679 void drawColorRects(const float* rects, int count, const SkPaint* paint, 680 bool ignoreTransform = false, bool dirty = true, bool clip = true); 681 682 /** 683 * Draws the shape represented by the specified path texture. 684 * This method invokes drawPathTexture() but takes into account 685 * the extra left/top offset and the texture offset to correctly 686 * position the final shape. 687 * 688 * @param left The left coordinate of the shape to render 689 * @param top The top coordinate of the shape to render 690 * @param texture The texture reprsenting the shape 691 * @param paint The paint to draw the shape with 692 */ 693 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 694 695 /** 696 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 697 * 698 * @param vertexBuffer The VertexBuffer to be drawn 699 * @param paint The paint to render with 700 * @param flags flags with which to draw 701 */ 702 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 703 const SkPaint* paint, int flags = 0); 704 705 /** 706 * Convenience for translating method 707 */ 708 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 709 const SkPaint* paint, int flags = 0) { 710 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 711 } 712 713 /** 714 * Renders the convex hull defined by the specified path as a strip of polygons. 715 * 716 * @param path The hull of the path to draw 717 * @param paint The paint to render with 718 */ 719 void drawConvexPath(const SkPath& path, const SkPaint* paint); 720 721 /** 722 * Draws text underline and strike-through if needed. 723 * 724 * @param text The text to decor 725 * @param bytesCount The number of bytes in the text 726 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 727 * @param x The x coordinate where the text will be drawn 728 * @param y The y coordinate where the text will be drawn 729 * @param paint The paint to draw the text with 730 */ 731 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 732 733 /** 734 * Draws shadow layer on text (with optional positions). 735 * 736 * @param paint The paint to draw the shadow with 737 * @param text The text to draw 738 * @param bytesCount The number of bytes in the text 739 * @param count The number of glyphs in the text 740 * @param positions The x, y positions of individual glyphs (or NULL) 741 * @param fontRenderer The font renderer object 742 * @param alpha The alpha value for drawing the shadow 743 * @param x The x coordinate where the shadow will be drawn 744 * @param y The y coordinate where the shadow will be drawn 745 */ 746 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 747 const float* positions, FontRenderer& fontRenderer, int alpha, 748 float x, float y); 749 750 /** 751 * Draws a path texture. Path textures are alpha8 bitmaps that need special 752 * compositing to apply colors/filters/etc. 753 * 754 * @param texture The texture to render 755 * @param x The x coordinate where the texture will be drawn 756 * @param y The y coordinate where the texture will be drawn 757 * @param paint The paint to draw the texture with 758 */ 759 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 760 761 /** 762 * Resets the texture coordinates stored in mMeshVertices. Setting the values 763 * back to default is achieved by calling: 764 * 765 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 766 * 767 * @param u1 The left coordinate of the texture 768 * @param v1 The bottom coordinate of the texture 769 * @param u2 The right coordinate of the texture 770 * @param v2 The top coordinate of the texture 771 */ 772 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 773 774 /** 775 * Returns true if the specified paint will draw invisible text. 776 */ 777 bool canSkipText(const SkPaint* paint) const; 778 779 bool updateLayer(Layer* layer, bool inFrame); 780 void updateLayers(); 781 void flushLayers(); 782 783#if DEBUG_LAYERS_AS_REGIONS 784 /** 785 * Renders the specified region as a series of rectangles. This method 786 * is used for debugging only. 787 */ 788 void drawRegionRectsDebug(const Region& region); 789#endif 790 791 /** 792 * Renders the specified region as a series of rectangles. The region 793 * must be in screen-space coordinates. 794 */ 795 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 796 797 /** 798 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 799 * is turned on. 800 */ 801 void debugClip(); 802 803 void debugOverdraw(bool enable, bool clear); 804 void renderOverdraw(); 805 void countOverdraw(); 806 807 /** 808 * Should be invoked every time the glScissor is modified. 809 */ 810 inline void dirtyClip() { mState.setDirtyClip(true); } 811 812 inline const UvMapper& getMapper(const Texture* texture) { 813 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 814 } 815 816 /** 817 * Returns a texture object for the specified bitmap. The texture can 818 * come from the texture cache or an atlas. If this method returns 819 * NULL, the texture could not be found and/or allocated. 820 */ 821 Texture* getTexture(const SkBitmap* bitmap); 822 823 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 824 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 825 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 826 827 // State used to define the clipping region 828 Rect mTilingClip; 829 // Is the target render surface opaque 830 bool mOpaque; 831 // Is a frame currently being rendered 832 bool mFrameStarted; 833 834 // Default UV mapper 835 const UvMapper mUvMapper; 836 837 // List of rectangles to clear after saveLayer() is invoked 838 std::vector<Rect> mLayers; 839 // List of layers to update at the beginning of a frame 840 std::vector< sp<Layer> > mLayerUpdates; 841 842 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 843 // Properties.h 844 bool mScissorOptimizationDisabled; 845 846 bool mSkipOutlineClip; 847 848 // True if anything has been drawn since the last call to 849 // reportAndClearDirty() 850 bool mDirty; 851 852 // Lighting + shadows 853 Vector3 mLightCenter; 854 float mLightRadius; 855 uint8_t mAmbientShadowAlpha; 856 uint8_t mSpotShadowAlpha; 857 858 // Paths kept alive for the duration of the frame 859 std::vector<std::unique_ptr<SkPath>> mTempPaths; 860 861 /** 862 * Initial transform for a rendering pass; transform from global device 863 * coordinates to the current RenderNode's drawing content coordinates, 864 * with the RenderNode's RenderProperty transforms already applied. 865 * Calling setMatrix(mBaseTransform) will result in drawing at the origin 866 * of the DisplayList's recorded surface prior to any Canvas 867 * transformation. 868 */ 869 Matrix4 mBaseTransform; 870 871 friend class Layer; 872 friend class TextDrawFunctor; 873 friend class DrawBitmapOp; 874 friend class DrawPatchOp; 875 876}; // class OpenGLRenderer 877 878}; // namespace uirenderer 879}; // namespace android 880 881#endif // ANDROID_HWUI_OPENGL_RENDERER_H 882