OpenGLRenderer.h revision 37b0824a46157b7e169ad7ec33a46e89c851884c
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(float lightRadius, uint8_t ambientShadowAlpha, 131 uint8_t spotShadowAlpha); 132 void setLightCenter(const Vector3& lightCenter); 133 134 /* 135 * Prepares the renderer to draw a frame. This method must be invoked 136 * at the beginning of each frame. Only the specified rectangle of the 137 * frame is assumed to be dirty. A clip will automatically be set to 138 * the specified rectangle. 139 * 140 * @param opaque If true, the target surface is considered opaque 141 * and will not be cleared. If false, the target surface 142 * will be cleared 143 */ 144 virtual void prepareDirty(float left, float top, float right, float bottom, 145 bool opaque); 146 147 /** 148 * Prepares the renderer to draw a frame. This method must be invoked 149 * at the beginning of each frame. When this method is invoked, the 150 * entire drawing surface is assumed to be redrawn. 151 * 152 * @param opaque If true, the target surface is considered opaque 153 * and will not be cleared. If false, the target surface 154 * will be cleared 155 */ 156 void prepare(bool opaque) { 157 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 158 } 159 160 /** 161 * Indicates the end of a frame. This method must be invoked whenever 162 * the caller is done rendering a frame. 163 * Returns true if any drawing was done during the frame (the output 164 * has changed / is "dirty" and should be displayed to the user). 165 */ 166 virtual bool finish(); 167 168 void callDrawGLFunction(Functor* functor, Rect& dirty); 169 170 void pushLayerUpdate(Layer* layer); 171 void cancelLayerUpdate(Layer* layer); 172 void flushLayerUpdates(); 173 void markLayersAsBuildLayers(); 174 175 virtual int saveLayer(float left, float top, float right, float bottom, 176 const SkPaint* paint, int flags) { 177 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 178 } 179 180 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 181 // created, which will in turn clip to that mask when drawn back/restored. 182 int saveLayer(float left, float top, float right, float bottom, 183 const SkPaint* paint, int flags, const SkPath* convexMask); 184 185 int saveLayerDeferred(float left, float top, float right, float bottom, 186 const SkPaint* paint, int flags); 187 188 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 189 void drawLayer(Layer* layer, float x, float y); 190 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 191 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 192 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 193 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 194 const SkPaint* paint); 195 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 196 const float* vertices, const int* colors, const SkPaint* paint); 197 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 198 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 199 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 200 float left, float top, float right, float bottom, const SkPaint* paint); 201 void drawColor(int color, SkXfermode::Mode mode); 202 void drawRect(float left, float top, float right, float bottom, 203 const SkPaint* paint); 204 void drawRoundRect(float left, float top, float right, float bottom, 205 float rx, float ry, const SkPaint* paint); 206 void drawCircle(float x, float y, float radius, const SkPaint* paint); 207 void drawOval(float left, float top, float right, float bottom, 208 const SkPaint* paint); 209 void drawArc(float left, float top, float right, float bottom, 210 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 211 void drawPath(const SkPath* path, const SkPaint* paint); 212 void drawLines(const float* points, int count, const SkPaint* paint); 213 void drawPoints(const float* points, int count, const SkPaint* paint); 214 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 215 float hOffset, float vOffset, const SkPaint* paint); 216 void drawPosText(const char* text, int bytesCount, int count, 217 const float* positions, const SkPaint* paint); 218 void drawText(const char* text, int bytesCount, int count, float x, float y, 219 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 220 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 221 void drawRects(const float* rects, int count, const SkPaint* paint); 222 223 void drawShadow(float casterAlpha, 224 const VertexBuffer* ambientShadowVertexBuffer, 225 const VertexBuffer* spotShadowVertexBuffer); 226 227 void setDrawFilter(SkDrawFilter* filter); 228 229 /** 230 * Store the current display state (most importantly, the current clip and transform), and 231 * additionally map the state's bounds from local to window coordinates. 232 * 233 * Returns true if quick-rejected 234 */ 235 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 236 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 237 void setupMergedMultiDraw(const Rect* clipRect); 238 239 bool isCurrentTransformSimple() { 240 return currentTransform()->isSimple(); 241 } 242 243 Caches& getCaches() { 244 return mCaches; 245 } 246 247 RenderState& renderState() { 248 return mRenderState; 249 } 250 251 int getViewportWidth() { return mState.getViewportWidth(); } 252 int getViewportHeight() { return mState.getViewportHeight(); } 253 254 /** 255 * Scales the alpha on the current snapshot. This alpha value will be modulated 256 * with other alpha values when drawing primitives. 257 */ 258 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 259 260 /** 261 * Inserts a named event marker in the stream of GL commands. 262 */ 263 void eventMark(const char* name) const; 264 265 /** 266 * Inserts a formatted event marker in the stream of GL commands. 267 */ 268 void eventMarkDEBUG(const char *fmt, ...) const; 269 270 /** 271 * Inserts a named group marker in the stream of GL commands. This marker 272 * can be used by tools to group commands into logical groups. A call to 273 * this method must always be followed later on by a call to endMark(). 274 */ 275 void startMark(const char* name) const; 276 277 /** 278 * Closes the last group marker opened by startMark(). 279 */ 280 void endMark() const; 281 282 /** 283 * Gets the alpha and xfermode out of a paint object. If the paint is null 284 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 285 * not multiply the paint's alpha by the current snapshot's alpha, and does 286 * not replace the alpha with the overrideLayerAlpha 287 * 288 * @param paint The paint to extract values from 289 * @param alpha Where to store the resulting alpha 290 * @param mode Where to store the resulting xfermode 291 */ 292 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 293 SkXfermode::Mode* mode) { 294 *mode = getXfermodeDirect(paint); 295 *alpha = getAlphaDirect(paint); 296 } 297 298 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 299 if (!paint) return SkXfermode::kSrcOver_Mode; 300 return PaintUtils::getXfermode(paint->getXfermode()); 301 } 302 303 static inline int getAlphaDirect(const SkPaint* paint) { 304 if (!paint) return 255; 305 return paint->getAlpha(); 306 } 307 308 struct TextShadow { 309 SkScalar radius; 310 float dx; 311 float dy; 312 SkColor color; 313 }; 314 315 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 316 SkDrawLooper::BlurShadowRec blur; 317 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 318 if (textShadow) { 319 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 320 textShadow->dx = blur.fOffset.fX; 321 textShadow->dy = blur.fOffset.fY; 322 textShadow->color = blur.fColor; 323 } 324 return true; 325 } 326 return false; 327 } 328 329 static inline bool hasTextShadow(const SkPaint* paint) { 330 return getTextShadow(paint, nullptr); 331 } 332 333 /** 334 * Build the best transform to use to rasterize text given a full 335 * transform matrix, and whether filteration is needed. 336 * 337 * Returns whether filtration is needed 338 */ 339 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 340 341#if DEBUG_MERGE_BEHAVIOR 342 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 343 mCaches.setScissorEnabled(false); 344 345 // should only be called outside of other draw ops, so stencil can only be in test state 346 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 347 mCaches.stencil.disable(); 348 349 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 350 351 if (stencilWasEnabled) mCaches.stencil.enableTest(); 352 mDirty = true; 353 } 354#endif 355 356 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 357 float getLightRadius() const { return mLightRadius; } 358 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 359 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 360 361 /////////////////////////////////////////////////////////////////// 362 /// State manipulation 363 364 int getSaveCount() const; 365 int save(int flags); 366 void restore(); 367 void restoreToCount(int saveCount); 368 369 void getMatrix(SkMatrix* outMatrix) const { mState.getMatrix(outMatrix); } 370 void setMatrix(const SkMatrix& matrix) { mState.setMatrix(matrix); } 371 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 372 373 void translate(float dx, float dy, float dz = 0.0f); 374 void rotate(float degrees); 375 void scale(float sx, float sy); 376 void skew(float sx, float sy); 377 378 void setMatrix(const Matrix4& matrix); // internal only convenience method 379 void concatMatrix(const Matrix4& matrix); // internal only convenience method 380 381 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } 382 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 383 bool quickRejectConservative(float left, float top, 384 float right, float bottom) const { 385 return mState.quickRejectConservative(left, top, right, bottom); 386 } 387 388 bool clipRect(float left, float top, 389 float right, float bottom, SkRegion::Op op); 390 bool clipPath(const SkPath* path, SkRegion::Op op); 391 bool clipRegion(const SkRegion* region, SkRegion::Op op); 392 393 /** 394 * Does not support different clipping Ops (that is, every call to setClippingOutline is 395 * effectively using SkRegion::kReplaceOp) 396 * 397 * The clipping outline is independent from the regular clip. 398 */ 399 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 400 void setClippingRoundRect(LinearAllocator& allocator, 401 const Rect& rect, float radius, bool highPriority = true); 402 void setProjectionPathMask(LinearAllocator& allocator, const SkPath* path); 403 404 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 405 inline const mat4* currentTransform() const { return mState.currentTransform(); } 406 407 /////////////////////////////////////////////////////////////////// 408 /// CanvasStateClient interface 409 410 virtual void onViewportInitialized() override; 411 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 412 virtual GLuint getTargetFbo() const override { return 0; } 413 414 SkPath* allocPathForFrame() { 415 std::unique_ptr<SkPath> path(new SkPath()); 416 SkPath* returnPath = path.get(); 417 mTempPaths.push_back(std::move(path)); 418 return returnPath; 419 } 420 421protected: 422 /** 423 * Perform the setup specific to a frame. This method does not 424 * issue any OpenGL commands. 425 */ 426 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 427 428 /** 429 * Indicates the start of rendering. This method will setup the 430 * initial OpenGL state (viewport, clearing the buffer, etc.) 431 */ 432 void startFrame(); 433 434 /** 435 * Clears the underlying surface if needed. 436 */ 437 virtual void clear(float left, float top, float right, float bottom, bool opaque); 438 439 /** 440 * Call this method after updating a layer during a drawing pass. 441 */ 442 void resumeAfterLayer(); 443 444 /** 445 * This method is called whenever a stencil buffer is required. Subclasses 446 * should override this method and call attachStencilBufferToLayer() on the 447 * appropriate layer(s). 448 */ 449 virtual void ensureStencilBuffer(); 450 451 /** 452 * Obtains a stencil render buffer (allocating it if necessary) and 453 * attaches it to the specified layer. 454 */ 455 void attachStencilBufferToLayer(Layer* layer); 456 457 /** 458 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 459 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 460 * in the list. 461 */ 462 void drawRectangleList(const RectangleList& rectangleList); 463 464 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 465 const SkPaint* paint = nullptr); 466 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 467 return quickRejectSetupScissor(bounds.left, bounds.top, 468 bounds.right, bounds.bottom, paint); 469 } 470 471 /** 472 * Compose the layer defined in the current snapshot with the layer 473 * defined by the previous snapshot. 474 * 475 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 476 * 477 * @param curent The current snapshot containing the layer to compose 478 * @param previous The previous snapshot to compose the current layer with 479 */ 480 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 481 482 /** 483 * Marks the specified region as dirty at the specified bounds. 484 */ 485 void dirtyLayerUnchecked(Rect& bounds, Region* region); 486 487 /** 488 * Returns the region of the current layer. 489 */ 490 virtual Region* getRegion() const { 491 return mState.currentRegion(); 492 } 493 494 /** 495 * Indicates whether rendering is currently targeted at a layer. 496 */ 497 virtual bool hasLayer() const { 498 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 499 } 500 501 /** 502 * Renders the specified layer as a textured quad. 503 * 504 * @param layer The layer to render 505 * @param rect The bounds of the layer 506 */ 507 void drawTextureLayer(Layer* layer, const Rect& rect); 508 509 /** 510 * Gets the alpha and xfermode out of a paint object. If the paint is null 511 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for snapshot alpha. 512 * 513 * @param paint The paint to extract values from 514 * @param alpha Where to store the resulting alpha 515 * @param mode Where to store the resulting xfermode 516 */ 517 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 518 519 /** 520 * Gets the alpha from a layer, accounting for snapshot alpha 521 * 522 * @param layer The layer from which the alpha is extracted 523 */ 524 inline float getLayerAlpha(const Layer* layer) const; 525 526 /** 527 * Set to true to suppress error checks at the end of a frame. 528 */ 529 virtual bool suppressErrorChecks() const { 530 return false; 531 } 532 533 CanvasState mState; 534 Caches& mCaches; 535 RenderState& mRenderState; 536 537private: 538 void renderGlop(const Glop& glop, bool clearLayer = true); 539 540 /** 541 * Discards the content of the framebuffer if supported by the driver. 542 * This method should be called at the beginning of a frame to optimize 543 * rendering on some tiler architectures. 544 */ 545 void discardFramebuffer(float left, float top, float right, float bottom); 546 547 /** 548 * Tells the GPU what part of the screen is about to be redrawn. 549 * This method will use the current layer space clip rect. 550 * This method needs to be invoked every time getTargetFbo() is 551 * bound again. 552 */ 553 void startTilingCurrentClip(bool opaque = false, bool expand = false); 554 555 /** 556 * Tells the GPU what part of the screen is about to be redrawn. 557 * This method needs to be invoked every time getTargetFbo() is 558 * bound again. 559 */ 560 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 561 562 /** 563 * Tells the GPU that we are done drawing the frame or that we 564 * are switching to another render target. 565 */ 566 void endTiling(); 567 568 /** 569 * Sets the clipping rectangle using glScissor. The clip is defined by 570 * the current snapshot's clipRect member. 571 */ 572 void setScissorFromClip(); 573 574 /** 575 * Sets the clipping region using the stencil buffer. The clip region 576 * is defined by the current snapshot's clipRegion member. 577 */ 578 void setStencilFromClip(); 579 580 /** 581 * Given the local bounds of the layer, calculates ... 582 */ 583 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 584 585 /** 586 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 587 */ 588 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 589 bool fboLayer, int alpha); 590 591 /** 592 * Creates a new layer stored in the specified snapshot. 593 * 594 * @param snapshot The snapshot associated with the new layer 595 * @param left The left coordinate of the layer 596 * @param top The top coordinate of the layer 597 * @param right The right coordinate of the layer 598 * @param bottom The bottom coordinate of the layer 599 * @param alpha The translucency of the layer 600 * @param mode The blending mode of the layer 601 * @param flags The layer save flags 602 * @param mask A mask to use when drawing the layer back, may be empty 603 * 604 * @return True if the layer was successfully created, false otherwise 605 */ 606 bool createLayer(float left, float top, float right, float bottom, 607 const SkPaint* paint, int flags, const SkPath* convexMask); 608 609 /** 610 * Creates a new layer stored in the specified snapshot as an FBO. 611 * 612 * @param layer The layer to store as an FBO 613 * @param snapshot The snapshot associated with the new layer 614 * @param bounds The bounds of the layer 615 */ 616 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 617 618 /** 619 * Compose the specified layer as a region. 620 * 621 * @param layer The layer to compose 622 * @param rect The layer's bounds 623 */ 624 void composeLayerRegion(Layer* layer, const Rect& rect); 625 626 /** 627 * Restores the content in layer to the screen, swapping the blend mode, 628 * specifically used in the restore() of a saveLayerAlpha(). 629 * 630 * This allows e.g. a layer that would have been drawn on top of existing content (with SrcOver) 631 * to be drawn underneath. 632 * 633 * This will always ignore the canvas transform. 634 */ 635 void composeLayerRectSwapped(Layer* layer, const Rect& rect); 636 637 /** 638 * Draws the content in layer to the screen. 639 */ 640 void composeLayerRect(Layer* layer, const Rect& rect); 641 642 /** 643 * Clears all the regions corresponding to the current list of layers. 644 * This method MUST be invoked before any drawing operation. 645 */ 646 void clearLayerRegions(); 647 648 /** 649 * Mark the layer as dirty at the specified coordinates. The coordinates 650 * are transformed with the supplied matrix. 651 */ 652 void dirtyLayer(const float left, const float top, 653 const float right, const float bottom, const Matrix4& transform); 654 655 /** 656 * Mark the layer as dirty at the specified coordinates. 657 */ 658 void dirtyLayer(const float left, const float top, 659 const float right, const float bottom); 660 661 /** 662 * Draws a colored rectangle with the specified color. The specified coordinates 663 * are transformed by the current snapshot's transform matrix unless specified 664 * otherwise. 665 * 666 * @param left The left coordinate of the rectangle 667 * @param top The top coordinate of the rectangle 668 * @param right The right coordinate of the rectangle 669 * @param bottom The bottom coordinate of the rectangle 670 * @param paint The paint containing the color, blending mode, etc. 671 * @param ignoreTransform True if the current transform should be ignored 672 */ 673 void drawColorRect(float left, float top, float right, float bottom, 674 const SkPaint* paint, bool ignoreTransform = false); 675 676 /** 677 * Draws a series of colored rectangles with the specified color. The specified 678 * coordinates are transformed by the current snapshot's transform matrix unless 679 * specified otherwise. 680 * 681 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 682 * per rectangle 683 * @param paint The paint containing the color, blending mode, etc. 684 * @param ignoreTransform True if the current transform should be ignored 685 * @param dirty True if calling this method should dirty the current layer 686 * @param clip True if the rects should be clipped, false otherwise 687 */ 688 void drawColorRects(const float* rects, int count, const SkPaint* paint, 689 bool ignoreTransform = false, bool dirty = true, bool clip = true); 690 691 /** 692 * Draws the shape represented by the specified path texture. 693 * This method invokes drawPathTexture() but takes into account 694 * the extra left/top offset and the texture offset to correctly 695 * position the final shape. 696 * 697 * @param left The left coordinate of the shape to render 698 * @param top The top coordinate of the shape to render 699 * @param texture The texture reprsenting the shape 700 * @param paint The paint to draw the shape with 701 */ 702 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 703 704 /** 705 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 706 * 707 * @param vertexBuffer The VertexBuffer to be drawn 708 * @param paint The paint to render with 709 * @param flags flags with which to draw 710 */ 711 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 712 const SkPaint* paint, int flags = 0); 713 714 /** 715 * Convenience for translating method 716 */ 717 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 718 const SkPaint* paint, int flags = 0) { 719 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 720 } 721 722 /** 723 * Renders the convex hull defined by the specified path as a strip of polygons. 724 * 725 * @param path The hull of the path to draw 726 * @param paint The paint to render with 727 */ 728 void drawConvexPath(const SkPath& path, const SkPaint* paint); 729 730 /** 731 * Draws text underline and strike-through if needed. 732 * 733 * @param text The text to decor 734 * @param bytesCount The number of bytes in the text 735 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 736 * @param x The x coordinate where the text will be drawn 737 * @param y The y coordinate where the text will be drawn 738 * @param paint The paint to draw the text with 739 */ 740 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 741 742 /** 743 * Draws shadow layer on text (with optional positions). 744 * 745 * @param paint The paint to draw the shadow with 746 * @param text The text to draw 747 * @param bytesCount The number of bytes in the text 748 * @param count The number of glyphs in the text 749 * @param positions The x, y positions of individual glyphs (or NULL) 750 * @param fontRenderer The font renderer object 751 * @param alpha The alpha value for drawing the shadow 752 * @param x The x coordinate where the shadow will be drawn 753 * @param y The y coordinate where the shadow will be drawn 754 */ 755 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 756 const float* positions, FontRenderer& fontRenderer, int alpha, 757 float x, float y); 758 759 /** 760 * Draws a path texture. Path textures are alpha8 bitmaps that need special 761 * compositing to apply colors/filters/etc. 762 * 763 * @param texture The texture to render 764 * @param x The x coordinate where the texture will be drawn 765 * @param y The y coordinate where the texture will be drawn 766 * @param paint The paint to draw the texture with 767 */ 768 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 769 770 /** 771 * Resets the texture coordinates stored in mMeshVertices. Setting the values 772 * back to default is achieved by calling: 773 * 774 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 775 * 776 * @param u1 The left coordinate of the texture 777 * @param v1 The bottom coordinate of the texture 778 * @param u2 The right coordinate of the texture 779 * @param v2 The top coordinate of the texture 780 */ 781 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 782 783 /** 784 * Returns true if the specified paint will draw invisible text. 785 */ 786 bool canSkipText(const SkPaint* paint) const; 787 788 bool updateLayer(Layer* layer, bool inFrame); 789 void updateLayers(); 790 void flushLayers(); 791 792#if DEBUG_LAYERS_AS_REGIONS 793 /** 794 * Renders the specified region as a series of rectangles. This method 795 * is used for debugging only. 796 */ 797 void drawRegionRectsDebug(const Region& region); 798#endif 799 800 /** 801 * Renders the specified region as a series of rectangles. The region 802 * must be in screen-space coordinates. 803 */ 804 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 805 806 /** 807 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 808 * is turned on. 809 */ 810 void debugClip(); 811 812 void debugOverdraw(bool enable, bool clear); 813 void renderOverdraw(); 814 void countOverdraw(); 815 816 /** 817 * Should be invoked every time the glScissor is modified. 818 */ 819 inline void dirtyClip() { mState.setDirtyClip(true); } 820 821 inline const UvMapper& getMapper(const Texture* texture) { 822 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 823 } 824 825 /** 826 * Returns a texture object for the specified bitmap. The texture can 827 * come from the texture cache or an atlas. If this method returns 828 * NULL, the texture could not be found and/or allocated. 829 */ 830 Texture* getTexture(const SkBitmap* bitmap); 831 832 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 833 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 834 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 835 836 // State used to define the clipping region 837 Rect mTilingClip; 838 // Is the target render surface opaque 839 bool mOpaque; 840 // Is a frame currently being rendered 841 bool mFrameStarted; 842 843 // Default UV mapper 844 const UvMapper mUvMapper; 845 846 // List of rectangles to clear after saveLayer() is invoked 847 std::vector<Rect> mLayers; 848 // List of layers to update at the beginning of a frame 849 Vector< sp<Layer> > mLayerUpdates; 850 851 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 852 // Properties.h 853 bool mScissorOptimizationDisabled; 854 855 // No-ops start/endTiling when set 856 bool mSuppressTiling; 857 bool mFirstFrameAfterResize; 858 859 bool mSkipOutlineClip; 860 861 // True if anything has been drawn since the last call to 862 // reportAndClearDirty() 863 bool mDirty; 864 865 // Lighting + shadows 866 Vector3 mLightCenter; 867 float mLightRadius; 868 uint8_t mAmbientShadowAlpha; 869 uint8_t mSpotShadowAlpha; 870 871 // Paths kept alive for the duration of the frame 872 std::vector<std::unique_ptr<SkPath>> mTempPaths; 873 874 friend class Layer; 875 friend class TextDrawFunctor; 876 friend class DrawBitmapOp; 877 friend class DrawPatchOp; 878 879}; // class OpenGLRenderer 880 881}; // namespace uirenderer 882}; // namespace android 883 884#endif // ANDROID_HWUI_OPENGL_RENDERER_H 885