OpenGLRenderer.h revision 8df5ffa9ae0667d9e0241adf4675753156fcef84
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 53class SkShader; 54 55namespace android { 56namespace uirenderer { 57 58enum class DrawOpMode { 59 kImmediate, 60 kDefer, 61 kFlush 62}; 63 64class DeferredDisplayState; 65struct Glop; 66class RenderState; 67class RenderNode; 68class TextDrawFunctor; 69class VertexBuffer; 70 71enum StateDeferFlags { 72 kStateDeferFlag_Draw = 0x1, 73 kStateDeferFlag_Clip = 0x2 74}; 75 76enum 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 86enum 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 */ 95enum 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 */ 115class OpenGLRenderer : public CanvasStateClient { 116public: 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 */ 127 void setViewport(int width, int height) { mState.setViewport(width, height); } 128 129 void initProperties(); 130 void initLight(const Vector3& lightCenter, float lightRadius, 131 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 132 133 /* 134 * Prepares the renderer to draw a frame. This method must be invoked 135 * at the beginning of each frame. Only the specified rectangle of the 136 * frame is assumed to be dirty. A clip will automatically be set to 137 * the specified rectangle. 138 * 139 * @param opaque If true, the target surface is considered opaque 140 * and will not be cleared. If false, the target surface 141 * will be cleared 142 */ 143 virtual void prepareDirty(float left, float top, float right, float bottom, 144 bool opaque); 145 146 /** 147 * Prepares the renderer to draw a frame. This method must be invoked 148 * at the beginning of each frame. When this method is invoked, the 149 * entire drawing surface is assumed to be redrawn. 150 * 151 * @param opaque If true, the target surface is considered opaque 152 * and will not be cleared. If false, the target surface 153 * will be cleared 154 */ 155 void prepare(bool opaque) { 156 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 157 } 158 159 /** 160 * Indicates the end of a frame. This method must be invoked whenever 161 * the caller is done rendering a frame. 162 * Returns true if any drawing was done during the frame (the output 163 * has changed / is "dirty" and should be displayed to the user). 164 */ 165 virtual bool finish(); 166 167 void callDrawGLFunction(Functor* functor, Rect& dirty); 168 169 void pushLayerUpdate(Layer* layer); 170 void cancelLayerUpdate(Layer* layer); 171 void flushLayerUpdates(); 172 void markLayersAsBuildLayers(); 173 174 virtual int saveLayer(float left, float top, float right, float bottom, 175 const SkPaint* paint, int flags) { 176 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 177 } 178 179 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 180 // created, which will in turn clip to that mask when drawn back/restored. 181 int saveLayer(float left, float top, float right, float bottom, 182 const SkPaint* paint, int flags, const SkPath* convexMask); 183 184 int saveLayerDeferred(float left, float top, float right, float bottom, 185 const SkPaint* paint, int flags); 186 187 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 188 void drawLayer(Layer* layer, float x, float y); 189 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 190 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 191 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 192 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 193 const SkPaint* paint); 194 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 195 const float* vertices, const int* colors, const SkPaint* paint); 196 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 197 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 198 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 199 float left, float top, float right, float bottom, const SkPaint* paint); 200 void drawColor(int color, SkXfermode::Mode mode); 201 void drawRect(float left, float top, float right, float bottom, 202 const SkPaint* paint); 203 void drawRoundRect(float left, float top, float right, float bottom, 204 float rx, float ry, const SkPaint* paint); 205 void drawCircle(float x, float y, float radius, const SkPaint* paint); 206 void drawOval(float left, float top, float right, float bottom, 207 const SkPaint* paint); 208 void drawArc(float left, float top, float right, float bottom, 209 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 210 void drawPath(const SkPath* path, const SkPaint* paint); 211 void drawLines(const float* points, int count, const SkPaint* paint); 212 void drawPoints(const float* points, int count, const SkPaint* paint); 213 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 214 float hOffset, float vOffset, const SkPaint* paint); 215 void drawPosText(const char* text, int bytesCount, int count, 216 const float* positions, const SkPaint* paint); 217 void drawText(const char* text, int bytesCount, int count, float x, float y, 218 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 219 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 220 void drawRects(const float* rects, int count, const SkPaint* paint); 221 222 void drawShadow(float casterAlpha, 223 const VertexBuffer* ambientShadowVertexBuffer, 224 const VertexBuffer* spotShadowVertexBuffer); 225 226 void setDrawFilter(SkDrawFilter* filter); 227 228 /** 229 * Store the current display state (most importantly, the current clip and transform), and 230 * additionally map the state's bounds from local to window coordinates. 231 * 232 * Returns true if quick-rejected 233 */ 234 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 235 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 236 void setupMergedMultiDraw(const Rect* clipRect); 237 238 bool isCurrentTransformSimple() { 239 return currentTransform()->isSimple(); 240 } 241 242 Caches& getCaches() { 243 return mCaches; 244 } 245 246 RenderState& renderState() { 247 return mRenderState; 248 } 249 250 int getViewportWidth() { return mState.getViewportWidth(); } 251 int getViewportHeight() { return mState.getViewportHeight(); } 252 253 /** 254 * Scales the alpha on the current snapshot. This alpha value will be modulated 255 * with other alpha values when drawing primitives. 256 */ 257 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 258 259 /** 260 * Inserts a named event marker in the stream of GL commands. 261 */ 262 void eventMark(const char* name) const; 263 264 /** 265 * Inserts a formatted event marker in the stream of GL commands. 266 */ 267 void eventMarkDEBUG(const char *fmt, ...) const; 268 269 /** 270 * Inserts a named group marker in the stream of GL commands. This marker 271 * can be used by tools to group commands into logical groups. A call to 272 * this method must always be followed later on by a call to endMark(). 273 */ 274 void startMark(const char* name) const; 275 276 /** 277 * Closes the last group marker opened by startMark(). 278 */ 279 void endMark() const; 280 281 /** 282 * Gets the alpha and xfermode out of a paint object. If the paint is null 283 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 284 * not multiply the paint's alpha by the current snapshot's alpha, and does 285 * not replace the alpha with the overrideLayerAlpha 286 * 287 * @param paint The paint to extract values from 288 * @param alpha Where to store the resulting alpha 289 * @param mode Where to store the resulting xfermode 290 */ 291 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 292 SkXfermode::Mode* mode) { 293 *mode = getXfermodeDirect(paint); 294 *alpha = getAlphaDirect(paint); 295 } 296 297 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 298 if (!paint) return SkXfermode::kSrcOver_Mode; 299 return PaintUtils::getXfermode(paint->getXfermode()); 300 } 301 302 static inline int getAlphaDirect(const SkPaint* paint) { 303 if (!paint) return 255; 304 return paint->getAlpha(); 305 } 306 307 struct TextShadow { 308 SkScalar radius; 309 float dx; 310 float dy; 311 SkColor color; 312 }; 313 314 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 315 SkDrawLooper::BlurShadowRec blur; 316 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 317 if (textShadow) { 318 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 319 textShadow->dx = blur.fOffset.fX; 320 textShadow->dy = blur.fOffset.fY; 321 textShadow->color = blur.fColor; 322 } 323 return true; 324 } 325 return false; 326 } 327 328 static inline bool hasTextShadow(const SkPaint* paint) { 329 return getTextShadow(paint, nullptr); 330 } 331 332 /** 333 * Build the best transform to use to rasterize text given a full 334 * transform matrix, and whether filteration is needed. 335 * 336 * Returns whether filtration is needed 337 */ 338 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 339 340#if DEBUG_MERGE_BEHAVIOR 341 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 342 mCaches.setScissorEnabled(false); 343 344 // should only be called outside of other draw ops, so stencil can only be in test state 345 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 346 mCaches.stencil.disable(); 347 348 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 349 350 if (stencilWasEnabled) mCaches.stencil.enableTest(); 351 mDirty = true; 352 } 353#endif 354 355 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 356 float getLightRadius() const { return mLightRadius; } 357 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 358 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 359 360 /////////////////////////////////////////////////////////////////// 361 /// State manipulation 362 363 int getSaveCount() const; 364 int save(int flags); 365 void restore(); 366 void restoreToCount(int saveCount); 367 368 void getMatrix(SkMatrix* outMatrix) const { mState.getMatrix(outMatrix); } 369 void setMatrix(const SkMatrix& matrix) { mState.setMatrix(matrix); } 370 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 371 372 void translate(float dx, float dy, float dz = 0.0f); 373 void rotate(float degrees); 374 void scale(float sx, float sy); 375 void skew(float sx, float sy); 376 377 void setMatrix(const Matrix4& matrix); // internal only convenience method 378 void concatMatrix(const Matrix4& matrix); // internal only convenience method 379 380 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } 381 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 382 bool quickRejectConservative(float left, float top, 383 float right, float bottom) const { 384 return mState.quickRejectConservative(left, top, right, bottom); 385 } 386 387 bool clipRect(float left, float top, 388 float right, float bottom, SkRegion::Op op); 389 bool clipPath(const SkPath* path, SkRegion::Op op); 390 bool clipRegion(const SkRegion* region, SkRegion::Op op); 391 392 /** 393 * Does not support different clipping Ops (that is, every call to setClippingOutline is 394 * effectively using SkRegion::kReplaceOp) 395 * 396 * The clipping outline is independent from the regular clip. 397 */ 398 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 399 void setClippingRoundRect(LinearAllocator& allocator, 400 const Rect& rect, float radius, bool highPriority = true); 401 402 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 403 inline const mat4* currentTransform() const { return mState.currentTransform(); } 404 405 /////////////////////////////////////////////////////////////////// 406 /// CanvasStateClient interface 407 408 virtual void onViewportInitialized() override; 409 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 410 virtual GLuint getTargetFbo() const override { return 0; } 411 412 SkPath* allocPathForFrame() { 413 std::unique_ptr<SkPath> path(new SkPath()); 414 SkPath* returnPath = path.get(); 415 mTempPaths.push_back(std::move(path)); 416 return returnPath; 417 } 418 419protected: 420 /** 421 * Perform the setup specific to a frame. This method does not 422 * issue any OpenGL commands. 423 */ 424 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 425 426 /** 427 * Indicates the start of rendering. This method will setup the 428 * initial OpenGL state (viewport, clearing the buffer, etc.) 429 */ 430 void startFrame(); 431 432 /** 433 * Clears the underlying surface if needed. 434 */ 435 virtual void clear(float left, float top, float right, float bottom, bool opaque); 436 437 /** 438 * Call this method after updating a layer during a drawing pass. 439 */ 440 void resumeAfterLayer(); 441 442 /** 443 * This method is called whenever a stencil buffer is required. Subclasses 444 * should override this method and call attachStencilBufferToLayer() on the 445 * appropriate layer(s). 446 */ 447 virtual void ensureStencilBuffer(); 448 449 /** 450 * Obtains a stencil render buffer (allocating it if necessary) and 451 * attaches it to the specified layer. 452 */ 453 void attachStencilBufferToLayer(Layer* layer); 454 455 /** 456 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 457 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 458 * in the list. 459 */ 460 void drawRectangleList(const RectangleList& rectangleList); 461 462 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 463 const SkPaint* paint = nullptr); 464 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 465 return quickRejectSetupScissor(bounds.left, bounds.top, 466 bounds.right, bounds.bottom, paint); 467 } 468 469 /** 470 * Compose the layer defined in the current snapshot with the layer 471 * defined by the previous snapshot. 472 * 473 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 474 * 475 * @param curent The current snapshot containing the layer to compose 476 * @param previous The previous snapshot to compose the current layer with 477 */ 478 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 479 480 /** 481 * Marks the specified region as dirty at the specified bounds. 482 */ 483 void dirtyLayerUnchecked(Rect& bounds, Region* region); 484 485 /** 486 * Returns the region of the current layer. 487 */ 488 virtual Region* getRegion() const { 489 return mState.currentRegion(); 490 } 491 492 /** 493 * Indicates whether rendering is currently targeted at a layer. 494 */ 495 virtual bool hasLayer() const { 496 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 497 } 498 499 /** 500 * Renders the specified layer as a textured quad. 501 * 502 * @param layer The layer to render 503 * @param rect The bounds of the layer 504 */ 505 void drawTextureLayer(Layer* layer, const Rect& rect); 506 507 /** 508 * Gets the alpha and xfermode out of a paint object. If the paint is null 509 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for snapshot alpha. 510 * 511 * @param paint The paint to extract values from 512 * @param alpha Where to store the resulting alpha 513 * @param mode Where to store the resulting xfermode 514 */ 515 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 516 517 /** 518 * Gets the alpha from a layer, accounting for snapshot alpha 519 * 520 * @param layer The layer from which the alpha is extracted 521 */ 522 inline float getLayerAlpha(const Layer* layer) const; 523 524 /** 525 * Safely retrieves the ColorFilter from the given Paint. If the paint is 526 * null then null is returned. 527 */ 528 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 529 return paint ? paint->getColorFilter() : nullptr; 530 } 531 532 /** 533 * Safely retrieves the Shader from the given Paint. If the paint is 534 * null then null is returned. 535 */ 536 static inline const SkShader* getShader(const SkPaint* paint) { 537 return paint ? paint->getShader() : nullptr; 538 } 539 540 /** 541 * Set to true to suppress error checks at the end of a frame. 542 */ 543 virtual bool suppressErrorChecks() const { 544 return false; 545 } 546 547 CanvasState mState; 548 Caches& mCaches; 549 RenderState& mRenderState; 550 551private: 552 void renderGlop(const Glop& glop, bool clearLayer = true); 553 554 /** 555 * Discards the content of the framebuffer if supported by the driver. 556 * This method should be called at the beginning of a frame to optimize 557 * rendering on some tiler architectures. 558 */ 559 void discardFramebuffer(float left, float top, float right, float bottom); 560 561 /** 562 * Tells the GPU what part of the screen is about to be redrawn. 563 * This method will use the current layer space clip rect. 564 * This method needs to be invoked every time getTargetFbo() is 565 * bound again. 566 */ 567 void startTilingCurrentClip(bool opaque = false, bool expand = false); 568 569 /** 570 * Tells the GPU what part of the screen is about to be redrawn. 571 * This method needs to be invoked every time getTargetFbo() is 572 * bound again. 573 */ 574 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 575 576 /** 577 * Tells the GPU that we are done drawing the frame or that we 578 * are switching to another render target. 579 */ 580 void endTiling(); 581 582 /** 583 * Sets the clipping rectangle using glScissor. The clip is defined by 584 * the current snapshot's clipRect member. 585 */ 586 void setScissorFromClip(); 587 588 /** 589 * Sets the clipping region using the stencil buffer. The clip region 590 * is defined by the current snapshot's clipRegion member. 591 */ 592 void setStencilFromClip(); 593 594 /** 595 * Given the local bounds of the layer, calculates ... 596 */ 597 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 598 599 /** 600 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 601 */ 602 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 603 bool fboLayer, int alpha); 604 605 /** 606 * Creates a new layer stored in the specified snapshot. 607 * 608 * @param snapshot The snapshot associated with the new layer 609 * @param left The left coordinate of the layer 610 * @param top The top coordinate of the layer 611 * @param right The right coordinate of the layer 612 * @param bottom The bottom coordinate of the layer 613 * @param alpha The translucency of the layer 614 * @param mode The blending mode of the layer 615 * @param flags The layer save flags 616 * @param mask A mask to use when drawing the layer back, may be empty 617 * 618 * @return True if the layer was successfully created, false otherwise 619 */ 620 bool createLayer(float left, float top, float right, float bottom, 621 const SkPaint* paint, int flags, const SkPath* convexMask); 622 623 /** 624 * Creates a new layer stored in the specified snapshot as an FBO. 625 * 626 * @param layer The layer to store as an FBO 627 * @param snapshot The snapshot associated with the new layer 628 * @param bounds The bounds of the layer 629 */ 630 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 631 632 /** 633 * Compose the specified layer as a region. 634 * 635 * @param layer The layer to compose 636 * @param rect The layer's bounds 637 */ 638 void composeLayerRegion(Layer* layer, const Rect& rect); 639 640 /** 641 * Compose the specified layer as a simple rectangle. 642 * 643 * @param layer The layer to compose 644 * @param rect The layer's bounds 645 * @param swap If true, the source and destination are swapped 646 */ 647 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 648 649 /** 650 * Clears all the regions corresponding to the current list of layers. 651 * This method MUST be invoked before any drawing operation. 652 */ 653 void clearLayerRegions(); 654 655 /** 656 * Mark the layer as dirty at the specified coordinates. The coordinates 657 * are transformed with the supplied matrix. 658 */ 659 void dirtyLayer(const float left, const float top, 660 const float right, const float bottom, const Matrix4& transform); 661 662 /** 663 * Mark the layer as dirty at the specified coordinates. 664 */ 665 void dirtyLayer(const float left, const float top, 666 const float right, const float bottom); 667 668 /** 669 * Draws a colored rectangle with the specified color. The specified coordinates 670 * are transformed by the current snapshot's transform matrix unless specified 671 * otherwise. 672 * 673 * @param left The left coordinate of the rectangle 674 * @param top The top coordinate of the rectangle 675 * @param right The right coordinate of the rectangle 676 * @param bottom The bottom coordinate of the rectangle 677 * @param paint The paint containing the color, blending mode, etc. 678 * @param ignoreTransform True if the current transform should be ignored 679 */ 680 void drawColorRect(float left, float top, float right, float bottom, 681 const SkPaint* paint, bool ignoreTransform = false); 682 683 /** 684 * Draws a series of colored rectangles with the specified color. The specified 685 * coordinates are transformed by the current snapshot's transform matrix unless 686 * specified otherwise. 687 * 688 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 689 * per rectangle 690 * @param paint The paint containing the color, blending mode, etc. 691 * @param ignoreTransform True if the current transform should be ignored 692 * @param dirty True if calling this method should dirty the current layer 693 * @param clip True if the rects should be clipped, false otherwise 694 */ 695 void drawColorRects(const float* rects, int count, const SkPaint* paint, 696 bool ignoreTransform = false, bool dirty = true, bool clip = true); 697 698 /** 699 * Draws the shape represented by the specified path texture. 700 * This method invokes drawPathTexture() but takes into account 701 * the extra left/top offset and the texture offset to correctly 702 * position the final shape. 703 * 704 * @param left The left coordinate of the shape to render 705 * @param top The top coordinate of the shape to render 706 * @param texture The texture reprsenting the shape 707 * @param paint The paint to draw the shape with 708 */ 709 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 710 711 /** 712 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 713 * 714 * @param vertexBuffer The VertexBuffer to be drawn 715 * @param paint The paint to render with 716 * @param flags flags with which to draw 717 */ 718 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 719 const SkPaint* paint, int flags = 0); 720 721 /** 722 * Convenience for translating method 723 */ 724 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 725 const SkPaint* paint, int flags = 0) { 726 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 727 } 728 729 /** 730 * Renders the convex hull defined by the specified path as a strip of polygons. 731 * 732 * @param path The hull of the path to draw 733 * @param paint The paint to render with 734 */ 735 void drawConvexPath(const SkPath& path, const SkPaint* paint); 736 737 /** 738 * Draws text underline and strike-through if needed. 739 * 740 * @param text The text to decor 741 * @param bytesCount The number of bytes in the text 742 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 743 * @param x The x coordinate where the text will be drawn 744 * @param y The y coordinate where the text will be drawn 745 * @param paint The paint to draw the text with 746 */ 747 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 748 749 /** 750 * Draws shadow layer on text (with optional positions). 751 * 752 * @param paint The paint to draw the shadow with 753 * @param text The text to draw 754 * @param bytesCount The number of bytes in the text 755 * @param count The number of glyphs in the text 756 * @param positions The x, y positions of individual glyphs (or NULL) 757 * @param fontRenderer The font renderer object 758 * @param alpha The alpha value for drawing the shadow 759 * @param x The x coordinate where the shadow will be drawn 760 * @param y The y coordinate where the shadow will be drawn 761 */ 762 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 763 const float* positions, FontRenderer& fontRenderer, int alpha, 764 float x, float y); 765 766 /** 767 * Draws a path texture. Path textures are alpha8 bitmaps that need special 768 * compositing to apply colors/filters/etc. 769 * 770 * @param texture The texture to render 771 * @param x The x coordinate where the texture will be drawn 772 * @param y The y coordinate where the texture will be drawn 773 * @param paint The paint to draw the texture with 774 */ 775 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 776 777 /** 778 * Resets the texture coordinates stored in mMeshVertices. Setting the values 779 * back to default is achieved by calling: 780 * 781 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 782 * 783 * @param u1 The left coordinate of the texture 784 * @param v1 The bottom coordinate of the texture 785 * @param u2 The right coordinate of the texture 786 * @param v2 The top coordinate of the texture 787 */ 788 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 789 790 /** 791 * Returns true if the specified paint will draw invisible text. 792 */ 793 bool canSkipText(const SkPaint* paint) const; 794 795 bool updateLayer(Layer* layer, bool inFrame); 796 void updateLayers(); 797 void flushLayers(); 798 799#if DEBUG_LAYERS_AS_REGIONS 800 /** 801 * Renders the specified region as a series of rectangles. This method 802 * is used for debugging only. 803 */ 804 void drawRegionRectsDebug(const Region& region); 805#endif 806 807 /** 808 * Renders the specified region as a series of rectangles. The region 809 * must be in screen-space coordinates. 810 */ 811 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 812 813 /** 814 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 815 * is turned on. 816 */ 817 void debugClip(); 818 819 void debugOverdraw(bool enable, bool clear); 820 void renderOverdraw(); 821 void countOverdraw(); 822 823 /** 824 * Should be invoked every time the glScissor is modified. 825 */ 826 inline void dirtyClip() { mState.setDirtyClip(true); } 827 828 inline const UvMapper& getMapper(const Texture* texture) { 829 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 830 } 831 832 /** 833 * Returns a texture object for the specified bitmap. The texture can 834 * come from the texture cache or an atlas. If this method returns 835 * NULL, the texture could not be found and/or allocated. 836 */ 837 Texture* getTexture(const SkBitmap* bitmap); 838 839 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 840 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 841 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 842 843 // State used to define the clipping region 844 Rect mTilingClip; 845 // Is the target render surface opaque 846 bool mOpaque; 847 // Is a frame currently being rendered 848 bool mFrameStarted; 849 850 // Default UV mapper 851 const UvMapper mUvMapper; 852 853 // List of rectangles to clear after saveLayer() is invoked 854 std::vector<Rect> mLayers; 855 // List of layers to update at the beginning of a frame 856 Vector< sp<Layer> > mLayerUpdates; 857 858 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 859 // Properties.h 860 bool mScissorOptimizationDisabled; 861 862 // No-ops start/endTiling when set 863 bool mSuppressTiling; 864 bool mFirstFrameAfterResize; 865 866 bool mSkipOutlineClip; 867 868 // True if anything has been drawn since the last call to 869 // reportAndClearDirty() 870 bool mDirty; 871 872 // Lighting + shadows 873 Vector3 mLightCenter; 874 float mLightRadius; 875 uint8_t mAmbientShadowAlpha; 876 uint8_t mSpotShadowAlpha; 877 878 // Paths kept alive for the duration of the frame 879 std::vector<std::unique_ptr<SkPath>> mTempPaths; 880 881 friend class Layer; 882 friend class TextDrawFunctor; 883 friend class DrawBitmapOp; 884 friend class DrawPatchOp; 885 886}; // class OpenGLRenderer 887 888}; // namespace uirenderer 889}; // namespace android 890 891#endif // ANDROID_HWUI_OPENGL_RENDERER_H 892