OpenGLRenderer.h revision 3aadd60521960be063ee06208562ccb63dc414e3
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 <SkDrawLooper.h> 39#include <SkMatrix.h> 40#include <SkPaint.h> 41#include <SkRegion.h> 42#include <SkXfermode.h> 43 44#include <utils/Blur.h> 45#include <utils/Functor.h> 46#include <utils/RefBase.h> 47#include <utils/SortedVector.h> 48 49#include <cutils/compiler.h> 50 51#include <androidfw/ResourceTypes.h> 52 53#include <vector> 54 55class SkShader; 56 57namespace android { 58namespace uirenderer { 59 60enum class DrawOpMode { 61 kImmediate, 62 kDefer, 63 kFlush 64}; 65 66class DeferredDisplayState; 67struct Glop; 68class RenderState; 69class RenderNode; 70class TextDrawFunctor; 71class VertexBuffer; 72 73enum StateDeferFlags { 74 kStateDeferFlag_Draw = 0x1, 75 kStateDeferFlag_Clip = 0x2 76}; 77 78enum ClipSideFlags { 79 kClipSide_None = 0x0, 80 kClipSide_Left = 0x1, 81 kClipSide_Top = 0x2, 82 kClipSide_Right = 0x4, 83 kClipSide_Bottom = 0x8, 84 kClipSide_Full = 0xF, 85 kClipSide_ConservativeFull = 0x1F 86}; 87 88enum VertexBufferDisplayFlags { 89 kVertexBuffer_Offset = 0x1, 90 kVertexBuffer_ShadowInterp = 0x2, 91}; 92 93/** 94 * Defines additional transformation that should be applied by the model view matrix, beyond that of 95 * the currentTransform() 96 */ 97enum ModelViewMode { 98 /** 99 * Used when the model view should simply translate geometry passed to the shader. The resulting 100 * matrix will be a simple translation. 101 */ 102 kModelViewMode_Translate = 0, 103 104 /** 105 * Used when the model view should translate and scale geometry. The resulting matrix will be a 106 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 107 */ 108 kModelViewMode_TranslateAndScale = 1, 109}; 110 111/////////////////////////////////////////////////////////////////////////////// 112// Renderer 113/////////////////////////////////////////////////////////////////////////////// 114/** 115 * OpenGL Renderer implementation. 116 */ 117class OpenGLRenderer : public CanvasStateClient { 118public: 119 OpenGLRenderer(RenderState& renderState); 120 virtual ~OpenGLRenderer(); 121 122 /** 123 * Sets the dimension of the underlying drawing surface. This method must 124 * be called at least once every time the drawing surface changes size. 125 * 126 * @param width The width in pixels of the underlysing surface 127 * @param height The height in pixels of the underlysing surface 128 */ 129 void setViewport(int width, int height) { mState.setViewport(width, height); } 130 131 void initProperties(); 132 void initLight(float lightRadius, uint8_t ambientShadowAlpha, 133 uint8_t spotShadowAlpha); 134 void setLightCenter(const Vector3& lightCenter); 135 136 /* 137 * Prepares the renderer to draw a frame. This method must be invoked 138 * at the beginning of each frame. Only the specified rectangle of the 139 * frame is assumed to be dirty. A clip will automatically be set to 140 * the specified rectangle. 141 * 142 * @param opaque If true, the target surface is considered opaque 143 * and will not be cleared. If false, the target surface 144 * will be cleared 145 */ 146 virtual void prepareDirty(float left, float top, float right, float bottom, 147 bool opaque); 148 149 /** 150 * Prepares the renderer to draw a frame. This method must be invoked 151 * at the beginning of each frame. When this method is invoked, the 152 * entire drawing surface is assumed to be redrawn. 153 * 154 * @param opaque If true, the target surface is considered opaque 155 * and will not be cleared. If false, the target surface 156 * will be cleared 157 */ 158 void prepare(bool opaque) { 159 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 160 } 161 162 /** 163 * Indicates the end of a frame. This method must be invoked whenever 164 * the caller is done rendering a frame. 165 * Returns true if any drawing was done during the frame (the output 166 * has changed / is "dirty" and should be displayed to the user). 167 */ 168 virtual bool finish(); 169 170 void callDrawGLFunction(Functor* functor, Rect& dirty); 171 172 void pushLayerUpdate(Layer* layer); 173 void cancelLayerUpdate(Layer* layer); 174 void flushLayerUpdates(); 175 void markLayersAsBuildLayers(); 176 177 virtual int saveLayer(float left, float top, float right, float bottom, 178 const SkPaint* paint, int flags) { 179 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 180 } 181 182 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 183 // created, which will in turn clip to that mask when drawn back/restored. 184 int saveLayer(float left, float top, float right, float bottom, 185 const SkPaint* paint, int flags, const SkPath* convexMask); 186 187 int saveLayerDeferred(float left, float top, float right, float bottom, 188 const SkPaint* paint, int flags); 189 190 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 191 void drawLayer(Layer* layer); 192 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 193 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 194 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 195 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 196 const SkPaint* paint); 197 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 198 const float* vertices, const int* colors, const SkPaint* paint); 199 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 200 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 201 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 202 float left, float top, float right, float bottom, const SkPaint* paint); 203 void drawColor(int color, SkXfermode::Mode mode); 204 void drawRect(float left, float top, float right, float bottom, 205 const SkPaint* paint); 206 void drawRoundRect(float left, float top, float right, float bottom, 207 float rx, float ry, const SkPaint* paint); 208 void drawCircle(float x, float y, float radius, const SkPaint* paint); 209 void drawOval(float left, float top, float right, float bottom, 210 const SkPaint* paint); 211 void drawArc(float left, float top, float right, float bottom, 212 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 213 void drawPath(const SkPath* path, const SkPaint* paint); 214 void drawLines(const float* points, int count, const SkPaint* paint); 215 void drawPoints(const float* points, int count, const SkPaint* paint); 216 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 217 float hOffset, float vOffset, const SkPaint* paint); 218 void drawPosText(const char* text, int bytesCount, int count, 219 const float* positions, const SkPaint* paint); 220 void drawText(const char* text, int bytesCount, int count, float x, float y, 221 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 222 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 223 void drawRects(const float* rects, int count, const SkPaint* paint); 224 225 void drawShadow(float casterAlpha, 226 const VertexBuffer* ambientShadowVertexBuffer, 227 const VertexBuffer* spotShadowVertexBuffer); 228 229 void setDrawFilter(SkDrawFilter* filter); 230 231 /** 232 * Store the current display state (most importantly, the current clip and transform), and 233 * additionally map the state's bounds from local to window coordinates. 234 * 235 * Returns true if quick-rejected 236 */ 237 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 238 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 239 void setupMergedMultiDraw(const Rect* clipRect); 240 241 bool isCurrentTransformSimple() { 242 return currentTransform()->isSimple(); 243 } 244 245 Caches& getCaches() { 246 return mCaches; 247 } 248 249 RenderState& renderState() { 250 return mRenderState; 251 } 252 253 int getViewportWidth() { return mState.getViewportWidth(); } 254 int getViewportHeight() { return mState.getViewportHeight(); } 255 256 /** 257 * Scales the alpha on the current snapshot. This alpha value will be modulated 258 * with other alpha values when drawing primitives. 259 */ 260 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 261 262 /** 263 * Inserts a named event marker in the stream of GL commands. 264 */ 265 void eventMark(const char* name) const; 266 267 /** 268 * Inserts a formatted event marker in the stream of GL commands. 269 */ 270 void eventMarkDEBUG(const char *fmt, ...) const; 271 272 /** 273 * Inserts a named group marker in the stream of GL commands. This marker 274 * can be used by tools to group commands into logical groups. A call to 275 * this method must always be followed later on by a call to endMark(). 276 */ 277 void startMark(const char* name) const; 278 279 /** 280 * Closes the last group marker opened by startMark(). 281 */ 282 void endMark() const; 283 284 /** 285 * Gets the alpha and xfermode out of a paint object. If the paint is null 286 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 287 * not multiply the paint's alpha by the current snapshot's alpha, and does 288 * not replace the alpha with the overrideLayerAlpha 289 * 290 * @param paint The paint to extract values from 291 * @param alpha Where to store the resulting alpha 292 * @param mode Where to store the resulting xfermode 293 */ 294 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 295 SkXfermode::Mode* mode) { 296 *mode = getXfermodeDirect(paint); 297 *alpha = getAlphaDirect(paint); 298 } 299 300 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 301 if (!paint) return SkXfermode::kSrcOver_Mode; 302 return PaintUtils::getXfermode(paint->getXfermode()); 303 } 304 305 static inline int getAlphaDirect(const SkPaint* paint) { 306 if (!paint) return 255; 307 return paint->getAlpha(); 308 } 309 310 struct TextShadow { 311 SkScalar radius; 312 float dx; 313 float dy; 314 SkColor color; 315 }; 316 317 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 318 SkDrawLooper::BlurShadowRec blur; 319 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 320 if (textShadow) { 321 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 322 textShadow->dx = blur.fOffset.fX; 323 textShadow->dy = blur.fOffset.fY; 324 textShadow->color = blur.fColor; 325 } 326 return true; 327 } 328 return false; 329 } 330 331 static inline bool hasTextShadow(const SkPaint* paint) { 332 return getTextShadow(paint, nullptr); 333 } 334 335 /** 336 * Build the best transform to use to rasterize text given a full 337 * transform matrix, and whether filteration is needed. 338 * 339 * Returns whether filtration is needed 340 */ 341 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 342 343#if DEBUG_MERGE_BEHAVIOR 344 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 345 mCaches.setScissorEnabled(false); 346 347 // should only be called outside of other draw ops, so stencil can only be in test state 348 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 349 mCaches.stencil.disable(); 350 351 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 352 353 if (stencilWasEnabled) mCaches.stencil.enableTest(); 354 mDirty = true; 355 } 356#endif 357 358 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 359 float getLightRadius() const { return mLightRadius; } 360 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 361 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 362 363 /////////////////////////////////////////////////////////////////// 364 /// State manipulation 365 366 int getSaveCount() const; 367 int save(int flags); 368 void restore(); 369 void restoreToCount(int saveCount); 370 371 void setGlobalMatrix(const Matrix4& matrix) { 372 mState.setMatrix(matrix); 373 } 374 void setLocalMatrix(const Matrix4& matrix); 375 void setLocalMatrix(const SkMatrix& matrix); 376 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 377 378 void translate(float dx, float dy, float dz = 0.0f); 379 void rotate(float degrees); 380 void scale(float sx, float sy); 381 void skew(float sx, float sy); 382 383 void setMatrix(const Matrix4& matrix); // internal only convenience method 384 void concatMatrix(const Matrix4& matrix); // internal only convenience method 385 386 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } 387 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 388 bool quickRejectConservative(float left, float top, 389 float right, float bottom) const { 390 return mState.quickRejectConservative(left, top, right, bottom); 391 } 392 393 bool clipRect(float left, float top, 394 float right, float bottom, SkRegion::Op op); 395 bool clipPath(const SkPath* path, SkRegion::Op op); 396 bool clipRegion(const SkRegion* region, SkRegion::Op op); 397 398 /** 399 * Does not support different clipping Ops (that is, every call to setClippingOutline is 400 * effectively using SkRegion::kReplaceOp) 401 * 402 * The clipping outline is independent from the regular clip. 403 */ 404 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 405 void setClippingRoundRect(LinearAllocator& allocator, 406 const Rect& rect, float radius, bool highPriority = true); 407 void setProjectionPathMask(LinearAllocator& allocator, const SkPath* path); 408 409 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 410 inline const mat4* currentTransform() const { return mState.currentTransform(); } 411 412 /////////////////////////////////////////////////////////////////// 413 /// CanvasStateClient interface 414 415 virtual void onViewportInitialized() override; 416 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 417 virtual GLuint getTargetFbo() const override { return 0; } 418 419 SkPath* allocPathForFrame() { 420 std::unique_ptr<SkPath> path(new SkPath()); 421 SkPath* returnPath = path.get(); 422 mTempPaths.push_back(std::move(path)); 423 return returnPath; 424 } 425 426 void setBaseTransform(const Matrix4& matrix) { mBaseTransform = matrix; } 427 428protected: 429 /** 430 * Perform the setup specific to a frame. This method does not 431 * issue any OpenGL commands. 432 */ 433 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 434 435 /** 436 * Indicates the start of rendering. This method will setup the 437 * initial OpenGL state (viewport, clearing the buffer, etc.) 438 */ 439 void startFrame(); 440 441 /** 442 * Clears the underlying surface if needed. 443 */ 444 virtual void clear(float left, float top, float right, float bottom, bool opaque); 445 446 /** 447 * Call this method after updating a layer during a drawing pass. 448 */ 449 void resumeAfterLayer(); 450 451 /** 452 * This method is called whenever a stencil buffer is required. Subclasses 453 * should override this method and call attachStencilBufferToLayer() on the 454 * appropriate layer(s). 455 */ 456 virtual void ensureStencilBuffer(); 457 458 /** 459 * Obtains a stencil render buffer (allocating it if necessary) and 460 * attaches it to the specified layer. 461 */ 462 void attachStencilBufferToLayer(Layer* layer); 463 464 /** 465 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 466 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 467 * in the list. 468 */ 469 void drawRectangleList(const RectangleList& rectangleList); 470 471 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 472 const SkPaint* paint = nullptr); 473 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 474 return quickRejectSetupScissor(bounds.left, bounds.top, 475 bounds.right, bounds.bottom, paint); 476 } 477 478 /** 479 * Compose the layer defined in the current snapshot with the layer 480 * defined by the previous snapshot. 481 * 482 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 483 * 484 * @param curent The current snapshot containing the layer to compose 485 * @param previous The previous snapshot to compose the current layer with 486 */ 487 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 488 489 /** 490 * Marks the specified region as dirty at the specified bounds. 491 */ 492 void dirtyLayerUnchecked(Rect& bounds, Region* region); 493 494 /** 495 * Returns the region of the current layer. 496 */ 497 virtual Region* getRegion() const { 498 return mState.currentRegion(); 499 } 500 501 /** 502 * Indicates whether rendering is currently targeted at a layer. 503 */ 504 virtual bool hasLayer() const { 505 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 506 } 507 508 /** 509 * Renders the specified layer as a textured quad. 510 * 511 * @param layer The layer to render 512 * @param rect The bounds of the layer 513 */ 514 void drawTextureLayer(Layer* layer, const Rect& rect); 515 516 /** 517 * Gets the alpha and xfermode out of a paint object. If the paint is null 518 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for snapshot alpha. 519 * 520 * @param paint The paint to extract values from 521 * @param alpha Where to store the resulting alpha 522 * @param mode Where to store the resulting xfermode 523 */ 524 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 525 526 /** 527 * Gets the alpha from a layer, accounting for snapshot alpha 528 * 529 * @param layer The layer from which the alpha is extracted 530 */ 531 inline float getLayerAlpha(const Layer* layer) const; 532 533 /** 534 * Set to true to suppress error checks at the end of a frame. 535 */ 536 virtual bool suppressErrorChecks() const { 537 return false; 538 } 539 540 CanvasState mState; 541 Caches& mCaches; 542 RenderState& mRenderState; 543 544private: 545 enum class GlopRenderType { 546 Standard, 547 Multi, 548 LayerClear 549 }; 550 551 void renderGlop(const Glop& glop, GlopRenderType type = GlopRenderType::Standard); 552 553 /** 554 * Discards the content of the framebuffer if supported by the driver. 555 * This method should be called at the beginning of a frame to optimize 556 * rendering on some tiler architectures. 557 */ 558 void discardFramebuffer(float left, float top, float right, float bottom); 559 560 /** 561 * Sets the clipping rectangle using glScissor. The clip is defined by 562 * the current snapshot's clipRect member. 563 */ 564 void setScissorFromClip(); 565 566 /** 567 * Sets the clipping region using the stencil buffer. The clip region 568 * is defined by the current snapshot's clipRegion member. 569 */ 570 void setStencilFromClip(); 571 572 /** 573 * Given the local bounds of the layer, calculates ... 574 */ 575 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 576 577 /** 578 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 579 */ 580 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 581 bool fboLayer, int alpha); 582 583 /** 584 * Creates a new layer stored in the specified snapshot. 585 * 586 * @param snapshot The snapshot associated with the new layer 587 * @param left The left coordinate of the layer 588 * @param top The top coordinate of the layer 589 * @param right The right coordinate of the layer 590 * @param bottom The bottom coordinate of the layer 591 * @param alpha The translucency of the layer 592 * @param mode The blending mode of the layer 593 * @param flags The layer save flags 594 * @param mask A mask to use when drawing the layer back, may be empty 595 * 596 * @return True if the layer was successfully created, false otherwise 597 */ 598 bool createLayer(float left, float top, float right, float bottom, 599 const SkPaint* paint, int flags, const SkPath* convexMask); 600 601 /** 602 * Creates a new layer stored in the specified snapshot as an FBO. 603 * 604 * @param layer The layer to store as an FBO 605 * @param snapshot The snapshot associated with the new layer 606 * @param bounds The bounds of the layer 607 */ 608 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 609 610 /** 611 * Compose the specified layer as a region. 612 * 613 * @param layer The layer to compose 614 * @param rect The layer's bounds 615 */ 616 void composeLayerRegion(Layer* layer, const Rect& rect); 617 618 /** 619 * Restores the content in layer to the screen, swapping the blend mode, 620 * specifically used in the restore() of a saveLayerAlpha(). 621 * 622 * This allows e.g. a layer that would have been drawn on top of existing content (with SrcOver) 623 * to be drawn underneath. 624 * 625 * This will always ignore the canvas transform. 626 */ 627 void composeLayerRectSwapped(Layer* layer, const Rect& rect); 628 629 /** 630 * Draws the content in layer to the screen. 631 */ 632 void composeLayerRect(Layer* layer, const Rect& rect); 633 634 /** 635 * Clears all the regions corresponding to the current list of layers. 636 * This method MUST be invoked before any drawing operation. 637 */ 638 void clearLayerRegions(); 639 640 /** 641 * Mark the layer as dirty at the specified coordinates. The coordinates 642 * are transformed with the supplied matrix. 643 */ 644 void dirtyLayer(const float left, const float top, 645 const float right, const float bottom, const Matrix4& transform); 646 647 /** 648 * Mark the layer as dirty at the specified coordinates. 649 */ 650 void dirtyLayer(const float left, const float top, 651 const float right, const float bottom); 652 653 /** 654 * Draws a colored rectangle with the specified color. The specified coordinates 655 * are transformed by the current snapshot's transform matrix unless specified 656 * otherwise. 657 * 658 * @param left The left coordinate of the rectangle 659 * @param top The top coordinate of the rectangle 660 * @param right The right coordinate of the rectangle 661 * @param bottom The bottom coordinate of the rectangle 662 * @param paint The paint containing the color, blending mode, etc. 663 * @param ignoreTransform True if the current transform should be ignored 664 */ 665 void drawColorRect(float left, float top, float right, float bottom, 666 const SkPaint* paint, bool ignoreTransform = false); 667 668 /** 669 * Draws a series of colored rectangles with the specified color. The specified 670 * coordinates are transformed by the current snapshot's transform matrix unless 671 * specified otherwise. 672 * 673 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 674 * per rectangle 675 * @param paint The paint containing the color, blending mode, etc. 676 * @param ignoreTransform True if the current transform should be ignored 677 * @param dirty True if calling this method should dirty the current layer 678 * @param clip True if the rects should be clipped, false otherwise 679 */ 680 void drawColorRects(const float* rects, int count, const SkPaint* paint, 681 bool ignoreTransform = false, bool dirty = true, bool clip = true); 682 683 /** 684 * Draws the shape represented by the specified path texture. 685 * This method invokes drawPathTexture() but takes into account 686 * the extra left/top offset and the texture offset to correctly 687 * position the final shape. 688 * 689 * @param left The left coordinate of the shape to render 690 * @param top The top coordinate of the shape to render 691 * @param texture The texture reprsenting the shape 692 * @param paint The paint to draw the shape with 693 */ 694 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 695 696 /** 697 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 698 * 699 * @param vertexBuffer The VertexBuffer to be drawn 700 * @param paint The paint to render with 701 * @param flags flags with which to draw 702 */ 703 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 704 const SkPaint* paint, int flags = 0); 705 706 /** 707 * Convenience for translating method 708 */ 709 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 710 const SkPaint* paint, int flags = 0) { 711 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 712 } 713 714 /** 715 * Renders the convex hull defined by the specified path as a strip of polygons. 716 * 717 * @param path The hull of the path to draw 718 * @param paint The paint to render with 719 */ 720 void drawConvexPath(const SkPath& path, const SkPaint* paint); 721 722 /** 723 * Draws text underline and strike-through if needed. 724 * 725 * @param text The text to decor 726 * @param bytesCount The number of bytes in the text 727 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 728 * @param x The x coordinate where the text will be drawn 729 * @param y The y coordinate where the text will be drawn 730 * @param paint The paint to draw the text with 731 */ 732 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 733 734 /** 735 * Draws shadow layer on text (with optional positions). 736 * 737 * @param paint The paint to draw the shadow with 738 * @param text The text to draw 739 * @param bytesCount The number of bytes in the text 740 * @param count The number of glyphs in the text 741 * @param positions The x, y positions of individual glyphs (or NULL) 742 * @param fontRenderer The font renderer object 743 * @param alpha The alpha value for drawing the shadow 744 * @param x The x coordinate where the shadow will be drawn 745 * @param y The y coordinate where the shadow will be drawn 746 */ 747 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 748 const float* positions, FontRenderer& fontRenderer, int alpha, 749 float x, float y); 750 751 /** 752 * Draws a path texture. Path textures are alpha8 bitmaps that need special 753 * compositing to apply colors/filters/etc. 754 * 755 * @param texture The texture to render 756 * @param x The x coordinate where the texture will be drawn 757 * @param y The y coordinate where the texture will be drawn 758 * @param paint The paint to draw the texture with 759 */ 760 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 761 762 /** 763 * Resets the texture coordinates stored in mMeshVertices. Setting the values 764 * back to default is achieved by calling: 765 * 766 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 767 * 768 * @param u1 The left coordinate of the texture 769 * @param v1 The bottom coordinate of the texture 770 * @param u2 The right coordinate of the texture 771 * @param v2 The top coordinate of the texture 772 */ 773 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 774 775 /** 776 * Returns true if the specified paint will draw invisible text. 777 */ 778 bool canSkipText(const SkPaint* paint) const; 779 780 bool updateLayer(Layer* layer, bool inFrame); 781 void updateLayers(); 782 void flushLayers(); 783 784#if DEBUG_LAYERS_AS_REGIONS 785 /** 786 * Renders the specified region as a series of rectangles. This method 787 * is used for debugging only. 788 */ 789 void drawRegionRectsDebug(const Region& region); 790#endif 791 792 /** 793 * Renders the specified region as a series of rectangles. The region 794 * must be in screen-space coordinates. 795 */ 796 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 797 798 /** 799 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 800 * is turned on. 801 */ 802 void debugClip(); 803 804 void debugOverdraw(bool enable, bool clear); 805 void renderOverdraw(); 806 void countOverdraw(); 807 808 /** 809 * Should be invoked every time the glScissor is modified. 810 */ 811 inline void dirtyClip() { mState.setDirtyClip(true); } 812 813 inline const UvMapper& getMapper(const Texture* texture) { 814 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 815 } 816 817 /** 818 * Returns a texture object for the specified bitmap. The texture can 819 * come from the texture cache or an atlas. If this method returns 820 * NULL, the texture could not be found and/or allocated. 821 */ 822 Texture* getTexture(const SkBitmap* bitmap); 823 824 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 825 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 826 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 827 828 // State used to define the clipping region 829 Rect mTilingClip; 830 // Is the target render surface opaque 831 bool mOpaque; 832 // Is a frame currently being rendered 833 bool mFrameStarted; 834 835 // Default UV mapper 836 const UvMapper mUvMapper; 837 838 // List of rectangles to clear after saveLayer() is invoked 839 std::vector<Rect> mLayers; 840 // List of layers to update at the beginning of a frame 841 std::vector< sp<Layer> > mLayerUpdates; 842 843 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 844 // Properties.h 845 bool mScissorOptimizationDisabled; 846 847 bool mSkipOutlineClip; 848 849 // True if anything has been drawn since the last call to 850 // reportAndClearDirty() 851 bool mDirty; 852 853 // Lighting + shadows 854 Vector3 mLightCenter; 855 float mLightRadius; 856 uint8_t mAmbientShadowAlpha; 857 uint8_t mSpotShadowAlpha; 858 859 // Paths kept alive for the duration of the frame 860 std::vector<std::unique_ptr<SkPath>> mTempPaths; 861 862 /** 863 * Initial transform for a rendering pass; transform from global device 864 * coordinates to the current RenderNode's drawing content coordinates, 865 * with the RenderNode's RenderProperty transforms already applied. 866 * Calling setMatrix(mBaseTransform) will result in drawing at the origin 867 * of the DisplayList's recorded surface prior to any Canvas 868 * transformation. 869 */ 870 Matrix4 mBaseTransform; 871 872 friend class Layer; 873 friend class TextDrawFunctor; 874 friend class DrawBitmapOp; 875 friend class DrawPatchOp; 876 877}; // class OpenGLRenderer 878 879}; // namespace uirenderer 880}; // namespace android 881 882#endif // ANDROID_HWUI_OPENGL_RENDERER_H 883