OpenGLRenderer.h revision a6b52198b9e73a4b7f80103116feeace74433246
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 TextSetupFunctor; 69class VertexBuffer; 70 71struct DrawModifiers { 72 DrawModifiers() 73 : mOverrideLayerAlpha(0.0f) {} 74 75 void reset() { 76 mOverrideLayerAlpha = 0.0f; 77 } 78 79 float mOverrideLayerAlpha; 80}; 81 82enum StateDeferFlags { 83 kStateDeferFlag_Draw = 0x1, 84 kStateDeferFlag_Clip = 0x2 85}; 86 87enum ClipSideFlags { 88 kClipSide_None = 0x0, 89 kClipSide_Left = 0x1, 90 kClipSide_Top = 0x2, 91 kClipSide_Right = 0x4, 92 kClipSide_Bottom = 0x8, 93 kClipSide_Full = 0xF, 94 kClipSide_ConservativeFull = 0x1F 95}; 96 97enum VertexBufferDisplayFlags { 98 kVertexBuffer_Offset = 0x1, 99 kVertexBuffer_ShadowInterp = 0x2, 100}; 101 102/** 103 * Defines additional transformation that should be applied by the model view matrix, beyond that of 104 * the currentTransform() 105 */ 106enum ModelViewMode { 107 /** 108 * Used when the model view should simply translate geometry passed to the shader. The resulting 109 * matrix will be a simple translation. 110 */ 111 kModelViewMode_Translate = 0, 112 113 /** 114 * Used when the model view should translate and scale geometry. The resulting matrix will be a 115 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 116 */ 117 kModelViewMode_TranslateAndScale = 1, 118}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public CanvasStateClient { 127public: 128 OpenGLRenderer(RenderState& renderState); 129 virtual ~OpenGLRenderer(); 130 131 /** 132 * Sets the dimension of the underlying drawing surface. This method must 133 * be called at least once every time the drawing surface changes size. 134 * 135 * @param width The width in pixels of the underlysing surface 136 * @param height The height in pixels of the underlysing surface 137 */ 138 void setViewport(int width, int height) { mState.setViewport(width, height); } 139 140 void initProperties(); 141 void initLight(const Vector3& lightCenter, float lightRadius, 142 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 143 144 /* 145 * Prepares the renderer to draw a frame. This method must be invoked 146 * at the beginning of each frame. Only the specified rectangle of the 147 * frame is assumed to be dirty. A clip will automatically be set to 148 * the specified rectangle. 149 * 150 * @param opaque If true, the target surface is considered opaque 151 * and will not be cleared. If false, the target surface 152 * will be cleared 153 */ 154 virtual void prepareDirty(float left, float top, float right, float bottom, 155 bool opaque); 156 157 /** 158 * Prepares the renderer to draw a frame. This method must be invoked 159 * at the beginning of each frame. When this method is invoked, the 160 * entire drawing surface is assumed to be redrawn. 161 * 162 * @param opaque If true, the target surface is considered opaque 163 * and will not be cleared. If false, the target surface 164 * will be cleared 165 */ 166 void prepare(bool opaque) { 167 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 168 } 169 170 /** 171 * Indicates the end of a frame. This method must be invoked whenever 172 * the caller is done rendering a frame. 173 * Returns true if any drawing was done during the frame (the output 174 * has changed / is "dirty" and should be displayed to the user). 175 */ 176 virtual bool finish(); 177 178 void callDrawGLFunction(Functor* functor, Rect& dirty); 179 180 void pushLayerUpdate(Layer* layer); 181 void cancelLayerUpdate(Layer* layer); 182 void flushLayerUpdates(); 183 void markLayersAsBuildLayers(); 184 185 virtual int saveLayer(float left, float top, float right, float bottom, 186 const SkPaint* paint, int flags) { 187 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 188 } 189 190 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 191 // created, which will in turn clip to that mask when drawn back/restored. 192 int saveLayer(float left, float top, float right, float bottom, 193 const SkPaint* paint, int flags, const SkPath* convexMask); 194 195 int saveLayerDeferred(float left, float top, float right, float bottom, 196 const SkPaint* paint, int flags); 197 198 void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 199 void drawLayer(Layer* layer, float x, float y); 200 void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 201 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 202 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 203 void drawBitmap(const SkBitmap* bitmap, Rect src, Rect dst, 204 const SkPaint* paint); 205 void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 206 const float* vertices, const int* colors, const SkPaint* paint); 207 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 208 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 209 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 210 float left, float top, float right, float bottom, const SkPaint* paint); 211 void drawColor(int color, SkXfermode::Mode mode); 212 void drawRect(float left, float top, float right, float bottom, 213 const SkPaint* paint); 214 void drawRoundRect(float left, float top, float right, float bottom, 215 float rx, float ry, const SkPaint* paint); 216 void drawCircle(float x, float y, float radius, const SkPaint* paint); 217 void drawOval(float left, float top, float right, float bottom, 218 const SkPaint* paint); 219 void drawArc(float left, float top, float right, float bottom, 220 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 221 void drawPath(const SkPath* path, const SkPaint* paint); 222 void drawLines(const float* points, int count, const SkPaint* paint); 223 void drawPoints(const float* points, int count, const SkPaint* paint); 224 void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 225 float hOffset, float vOffset, const SkPaint* paint); 226 void drawPosText(const char* text, int bytesCount, int count, 227 const float* positions, const SkPaint* paint); 228 void drawText(const char* text, int bytesCount, int count, float x, float y, 229 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 230 DrawOpMode drawOpMode = DrawOpMode::kImmediate); 231 void drawRects(const float* rects, int count, const SkPaint* paint); 232 233 void drawShadow(float casterAlpha, 234 const VertexBuffer* ambientShadowVertexBuffer, 235 const VertexBuffer* spotShadowVertexBuffer); 236 237 void setDrawFilter(SkDrawFilter* filter); 238 239 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 240 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 241 242 /** 243 * Store the current display state (most importantly, the current clip and transform), and 244 * additionally map the state's bounds from local to window coordinates. 245 * 246 * Returns true if quick-rejected 247 */ 248 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 249 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 250 void setupMergedMultiDraw(const Rect* clipRect); 251 252 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 253 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 254 255 bool isCurrentTransformSimple() { 256 return currentTransform()->isSimple(); 257 } 258 259 Caches& getCaches() { 260 return mCaches; 261 } 262 263 RenderState& renderState() { 264 return mRenderState; 265 } 266 267 int getViewportWidth() { return mState.getViewportWidth(); } 268 int getViewportHeight() { return mState.getViewportHeight(); } 269 270 /** 271 * Scales the alpha on the current snapshot. This alpha value will be modulated 272 * with other alpha values when drawing primitives. 273 */ 274 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 275 276 /** 277 * Inserts a named event marker in the stream of GL commands. 278 */ 279 void eventMark(const char* name) const; 280 281 /** 282 * Inserts a formatted event marker in the stream of GL commands. 283 */ 284 void eventMarkDEBUG(const char *fmt, ...) const; 285 286 /** 287 * Inserts a named group marker in the stream of GL commands. This marker 288 * can be used by tools to group commands into logical groups. A call to 289 * this method must always be followed later on by a call to endMark(). 290 */ 291 void startMark(const char* name) const; 292 293 /** 294 * Closes the last group marker opened by startMark(). 295 */ 296 void endMark() const; 297 298 /** 299 * Gets the alpha and xfermode out of a paint object. If the paint is null 300 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 301 * not multiply the paint's alpha by the current snapshot's alpha, and does 302 * not replace the alpha with the overrideLayerAlpha 303 * 304 * @param paint The paint to extract values from 305 * @param alpha Where to store the resulting alpha 306 * @param mode Where to store the resulting xfermode 307 */ 308 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 309 SkXfermode::Mode* mode) { 310 *mode = getXfermodeDirect(paint); 311 *alpha = getAlphaDirect(paint); 312 } 313 314 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 315 if (!paint) return SkXfermode::kSrcOver_Mode; 316 return PaintUtils::getXfermode(paint->getXfermode()); 317 } 318 319 static inline int getAlphaDirect(const SkPaint* paint) { 320 if (!paint) return 255; 321 return paint->getAlpha(); 322 } 323 324 struct TextShadow { 325 SkScalar radius; 326 float dx; 327 float dy; 328 SkColor color; 329 }; 330 331 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 332 SkDrawLooper::BlurShadowRec blur; 333 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 334 if (textShadow) { 335 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 336 textShadow->dx = blur.fOffset.fX; 337 textShadow->dy = blur.fOffset.fY; 338 textShadow->color = blur.fColor; 339 } 340 return true; 341 } 342 return false; 343 } 344 345 static inline bool hasTextShadow(const SkPaint* paint) { 346 return getTextShadow(paint, nullptr); 347 } 348 349 /** 350 * Build the best transform to use to rasterize text given a full 351 * transform matrix, and whether filteration is needed. 352 * 353 * Returns whether filtration is needed 354 */ 355 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 356 357#if DEBUG_MERGE_BEHAVIOR 358 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 359 mCaches.setScissorEnabled(false); 360 361 // should only be called outside of other draw ops, so stencil can only be in test state 362 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 363 mCaches.stencil.disable(); 364 365 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 366 367 if (stencilWasEnabled) mCaches.stencil.enableTest(); 368 mDirty = true; 369 } 370#endif 371 372 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 373 float getLightRadius() const { return mLightRadius; } 374 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 375 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 376 377 /////////////////////////////////////////////////////////////////// 378 /// State manipulation 379 380 int getSaveCount() const; 381 int save(int flags); 382 void restore(); 383 void restoreToCount(int saveCount); 384 385 void getMatrix(SkMatrix* outMatrix) const { mState.getMatrix(outMatrix); } 386 void setMatrix(const SkMatrix& matrix) { mState.setMatrix(matrix); } 387 void concatMatrix(const SkMatrix& matrix) { mState.concatMatrix(matrix); } 388 389 void translate(float dx, float dy, float dz = 0.0f); 390 void rotate(float degrees); 391 void scale(float sx, float sy); 392 void skew(float sx, float sy); 393 394 void setMatrix(const Matrix4& matrix); // internal only convenience method 395 void concatMatrix(const Matrix4& matrix); // internal only convenience method 396 397 const Rect& getLocalClipBounds() const { return mState.getLocalClipBounds(); } 398 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 399 bool quickRejectConservative(float left, float top, 400 float right, float bottom) const { 401 return mState.quickRejectConservative(left, top, right, bottom); 402 } 403 404 bool clipRect(float left, float top, 405 float right, float bottom, SkRegion::Op op); 406 bool clipPath(const SkPath* path, SkRegion::Op op); 407 bool clipRegion(const SkRegion* region, SkRegion::Op op); 408 409 /** 410 * Does not support different clipping Ops (that is, every call to setClippingOutline is 411 * effectively using SkRegion::kReplaceOp) 412 * 413 * The clipping outline is independent from the regular clip. 414 */ 415 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 416 void setClippingRoundRect(LinearAllocator& allocator, 417 const Rect& rect, float radius, bool highPriority = true); 418 419 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 420 inline const mat4* currentTransform() const { return mState.currentTransform(); } 421 422 /////////////////////////////////////////////////////////////////// 423 /// CanvasStateClient interface 424 425 virtual void onViewportInitialized() override; 426 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 427 virtual GLuint getTargetFbo() const override { return 0; } 428 429 SkPath* allocPathForFrame() { 430 std::unique_ptr<SkPath> path(new SkPath()); 431 SkPath* returnPath = path.get(); 432 mTempPaths.push_back(std::move(path)); 433 return returnPath; 434 } 435 436protected: 437 /** 438 * Perform the setup specific to a frame. This method does not 439 * issue any OpenGL commands. 440 */ 441 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 442 443 /** 444 * Indicates the start of rendering. This method will setup the 445 * initial OpenGL state (viewport, clearing the buffer, etc.) 446 */ 447 void startFrame(); 448 449 /** 450 * Clears the underlying surface if needed. 451 */ 452 virtual void clear(float left, float top, float right, float bottom, bool opaque); 453 454 /** 455 * Call this method after updating a layer during a drawing pass. 456 */ 457 void resumeAfterLayer(); 458 459 /** 460 * This method is called whenever a stencil buffer is required. Subclasses 461 * should override this method and call attachStencilBufferToLayer() on the 462 * appropriate layer(s). 463 */ 464 virtual void ensureStencilBuffer(); 465 466 /** 467 * Obtains a stencil render buffer (allocating it if necessary) and 468 * attaches it to the specified layer. 469 */ 470 void attachStencilBufferToLayer(Layer* layer); 471 472 /** 473 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 474 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 475 * in the list. 476 */ 477 void drawRectangleList(const RectangleList& rectangleList); 478 479 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 480 const SkPaint* paint = nullptr); 481 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 482 return quickRejectSetupScissor(bounds.left, bounds.top, 483 bounds.right, bounds.bottom, paint); 484 } 485 486 /** 487 * Compose the layer defined in the current snapshot with the layer 488 * defined by the previous snapshot. 489 * 490 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 491 * 492 * @param curent The current snapshot containing the layer to compose 493 * @param previous The previous snapshot to compose the current layer with 494 */ 495 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 496 497 /** 498 * Marks the specified region as dirty at the specified bounds. 499 */ 500 void dirtyLayerUnchecked(Rect& bounds, Region* region); 501 502 /** 503 * Returns the region of the current layer. 504 */ 505 virtual Region* getRegion() const { 506 return mState.currentRegion(); 507 } 508 509 /** 510 * Indicates whether rendering is currently targeted at a layer. 511 */ 512 virtual bool hasLayer() const { 513 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 514 } 515 516 /** 517 * Renders the specified layer as a textured quad. 518 * 519 * @param layer The layer to render 520 * @param rect The bounds of the layer 521 */ 522 void drawTextureLayer(Layer* layer, const Rect& rect); 523 524 /** 525 * Gets the alpha and xfermode out of a paint object. If the paint is null 526 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 527 * snapshot alpha, and overrideLayerAlpha 528 * 529 * @param paint The paint to extract values from 530 * @param alpha Where to store the resulting alpha 531 * @param mode Where to store the resulting xfermode 532 */ 533 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 534 535 /** 536 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 537 * 538 * @param layer The layer from which the alpha is extracted 539 */ 540 inline float getLayerAlpha(const Layer* layer) const; 541 542 /** 543 * Safely retrieves the ColorFilter from the given Paint. If the paint is 544 * null then null is returned. 545 */ 546 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 547 return paint ? paint->getColorFilter() : nullptr; 548 } 549 550 /** 551 * Safely retrieves the Shader from the given Paint. If the paint is 552 * null then null is returned. 553 */ 554 static inline const SkShader* getShader(const SkPaint* paint) { 555 return paint ? paint->getShader() : nullptr; 556 } 557 558 /** 559 * Set to true to suppress error checks at the end of a frame. 560 */ 561 virtual bool suppressErrorChecks() const { 562 return false; 563 } 564 565 CanvasState mState; 566 Caches& mCaches; 567 RenderState& mRenderState; 568 569private: 570 void renderGlop(const Glop& glop, bool clearLayer = true); 571 572 /** 573 * Discards the content of the framebuffer if supported by the driver. 574 * This method should be called at the beginning of a frame to optimize 575 * rendering on some tiler architectures. 576 */ 577 void discardFramebuffer(float left, float top, float right, float bottom); 578 579 /** 580 * Tells the GPU what part of the screen is about to be redrawn. 581 * This method will use the current layer space clip rect. 582 * This method needs to be invoked every time getTargetFbo() is 583 * bound again. 584 */ 585 void startTilingCurrentClip(bool opaque = false, bool expand = false); 586 587 /** 588 * Tells the GPU what part of the screen is about to be redrawn. 589 * This method needs to be invoked every time getTargetFbo() is 590 * bound again. 591 */ 592 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 593 594 /** 595 * Tells the GPU that we are done drawing the frame or that we 596 * are switching to another render target. 597 */ 598 void endTiling(); 599 600 /** 601 * Sets the clipping rectangle using glScissor. The clip is defined by 602 * the current snapshot's clipRect member. 603 */ 604 void setScissorFromClip(); 605 606 /** 607 * Sets the clipping region using the stencil buffer. The clip region 608 * is defined by the current snapshot's clipRegion member. 609 */ 610 void setStencilFromClip(); 611 612 /** 613 * Given the local bounds of the layer, calculates ... 614 */ 615 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 616 617 /** 618 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 619 */ 620 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 621 bool fboLayer, int alpha); 622 623 /** 624 * Creates a new layer stored in the specified snapshot. 625 * 626 * @param snapshot The snapshot associated with the new layer 627 * @param left The left coordinate of the layer 628 * @param top The top coordinate of the layer 629 * @param right The right coordinate of the layer 630 * @param bottom The bottom coordinate of the layer 631 * @param alpha The translucency of the layer 632 * @param mode The blending mode of the layer 633 * @param flags The layer save flags 634 * @param mask A mask to use when drawing the layer back, may be empty 635 * 636 * @return True if the layer was successfully created, false otherwise 637 */ 638 bool createLayer(float left, float top, float right, float bottom, 639 const SkPaint* paint, int flags, const SkPath* convexMask); 640 641 /** 642 * Creates a new layer stored in the specified snapshot as an FBO. 643 * 644 * @param layer The layer to store as an FBO 645 * @param snapshot The snapshot associated with the new layer 646 * @param bounds The bounds of the layer 647 */ 648 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 649 650 /** 651 * Compose the specified layer as a region. 652 * 653 * @param layer The layer to compose 654 * @param rect The layer's bounds 655 */ 656 void composeLayerRegion(Layer* layer, const Rect& rect); 657 658 /** 659 * Compose the specified layer as a simple rectangle. 660 * 661 * @param layer The layer to compose 662 * @param rect The layer's bounds 663 * @param swap If true, the source and destination are swapped 664 */ 665 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 666 667 /** 668 * Clears all the regions corresponding to the current list of layers. 669 * This method MUST be invoked before any drawing operation. 670 */ 671 void clearLayerRegions(); 672 673 /** 674 * Mark the layer as dirty at the specified coordinates. The coordinates 675 * are transformed with the supplied matrix. 676 */ 677 void dirtyLayer(const float left, const float top, 678 const float right, const float bottom, const Matrix4& transform); 679 680 /** 681 * Mark the layer as dirty at the specified coordinates. 682 */ 683 void dirtyLayer(const float left, const float top, 684 const float right, const float bottom); 685 686 /** 687 * Draws a colored rectangle with the specified color. The specified coordinates 688 * are transformed by the current snapshot's transform matrix unless specified 689 * otherwise. 690 * 691 * @param left The left coordinate of the rectangle 692 * @param top The top coordinate of the rectangle 693 * @param right The right coordinate of the rectangle 694 * @param bottom The bottom coordinate of the rectangle 695 * @param paint The paint containing the color, blending mode, etc. 696 * @param ignoreTransform True if the current transform should be ignored 697 */ 698 void drawColorRect(float left, float top, float right, float bottom, 699 const SkPaint* paint, bool ignoreTransform = false); 700 701 /** 702 * Draws a series of colored rectangles with the specified color. The specified 703 * coordinates are transformed by the current snapshot's transform matrix unless 704 * specified otherwise. 705 * 706 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 707 * per rectangle 708 * @param paint The paint containing the color, blending mode, etc. 709 * @param ignoreTransform True if the current transform should be ignored 710 * @param dirty True if calling this method should dirty the current layer 711 * @param clip True if the rects should be clipped, false otherwise 712 */ 713 void drawColorRects(const float* rects, int count, const SkPaint* paint, 714 bool ignoreTransform = false, bool dirty = true, bool clip = true); 715 716 /** 717 * Draws the shape represented by the specified path texture. 718 * This method invokes drawPathTexture() but takes into account 719 * the extra left/top offset and the texture offset to correctly 720 * position the final shape. 721 * 722 * @param left The left coordinate of the shape to render 723 * @param top The top coordinate of the shape to render 724 * @param texture The texture reprsenting the shape 725 * @param paint The paint to draw the shape with 726 */ 727 void drawShape(float left, float top, PathTexture* texture, const SkPaint* paint); 728 729 /** 730 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 731 * different compositing rules. 732 * 733 * @param texture The texture to draw with 734 * @param paint The paint to render with 735 */ 736 void drawAlphaBitmap(Texture* texture, const SkPaint* paint); 737 738 /** 739 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 740 * 741 * @param vertexBuffer The VertexBuffer to be drawn 742 * @param paint The paint to render with 743 * @param flags flags with which to draw 744 */ 745 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 746 const SkPaint* paint, int flags = 0); 747 748 /** 749 * Convenience for translating method 750 */ 751 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 752 const SkPaint* paint, int flags = 0) { 753 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 754 } 755 756 /** 757 * Renders the convex hull defined by the specified path as a strip of polygons. 758 * 759 * @param path The hull of the path to draw 760 * @param paint The paint to render with 761 */ 762 void drawConvexPath(const SkPath& path, const SkPaint* paint); 763 764 /** 765 * Draws a textured rectangle with the specified texture. 766 * 767 * @param texture The texture to use 768 * @param paint The paint containing the alpha, blending mode, etc. 769 */ 770 void drawTextureRect(Texture* texture, const SkPaint* paint); 771 772 /** 773 * Draws a textured mesh with the specified texture. If the indices are omitted, 774 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 775 * VBO is bound. 776 * 777 * @param left The left coordinate of the rectangle 778 * @param top The top coordinate of the rectangle 779 * @param right The right coordinate of the rectangle 780 * @param bottom The bottom coordinate of the rectangle 781 * @param texture The texture name to map onto the rectangle 782 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 783 * @param blend True if the texture contains an alpha channel 784 * @param vertices The vertices that define the mesh 785 * @param texCoords The texture coordinates of each vertex 786 * @param elementsCount The number of elements in the mesh, required by indices 787 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 788 * @param ignoreTransform True if the current transform should be ignored 789 * @param vbo The VBO used to draw the mesh 790 * @param modelViewMode Defines whether the model view matrix should be scaled 791 * @param dirty True if calling this method should dirty the current layer 792 */ 793 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 794 const SkPaint* paint, bool blend, 795 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 796 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 797 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 798 799 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 800 const SkPaint* paint, bool blend, 801 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 802 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 803 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 804 805 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 806 GLuint texture, const SkPaint* paint, 807 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 808 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 809 bool dirty = true); 810 811 /** 812 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 813 * If the number of vertices to draw exceeds the number of indices we have 814 * pre-allocated, this method will generate several glDrawElements() calls. 815 */ 816 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 817 818 /** 819 * Draws text underline and strike-through if needed. 820 * 821 * @param text The text to decor 822 * @param bytesCount The number of bytes in the text 823 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 824 * @param x The x coordinate where the text will be drawn 825 * @param y The y coordinate where the text will be drawn 826 * @param paint The paint to draw the text with 827 */ 828 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 829 830 /** 831 * Draws shadow layer on text (with optional positions). 832 * 833 * @param paint The paint to draw the shadow with 834 * @param text The text to draw 835 * @param bytesCount The number of bytes in the text 836 * @param count The number of glyphs in the text 837 * @param positions The x, y positions of individual glyphs (or NULL) 838 * @param fontRenderer The font renderer object 839 * @param alpha The alpha value for drawing the shadow 840 * @param x The x coordinate where the shadow will be drawn 841 * @param y The y coordinate where the shadow will be drawn 842 */ 843 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 844 const float* positions, FontRenderer& fontRenderer, int alpha, 845 float x, float y); 846 847 /** 848 * Draws a path texture. Path textures are alpha8 bitmaps that need special 849 * compositing to apply colors/filters/etc. 850 * 851 * @param texture The texture to render 852 * @param x The x coordinate where the texture will be drawn 853 * @param y The y coordinate where the texture will be drawn 854 * @param paint The paint to draw the texture with 855 */ 856 void drawPathTexture(PathTexture* texture, float x, float y, const SkPaint* paint); 857 858 /** 859 * Resets the texture coordinates stored in mMeshVertices. Setting the values 860 * back to default is achieved by calling: 861 * 862 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 863 * 864 * @param u1 The left coordinate of the texture 865 * @param v1 The bottom coordinate of the texture 866 * @param u2 The right coordinate of the texture 867 * @param v2 The top coordinate of the texture 868 */ 869 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 870 871 /** 872 * Returns true if the specified paint will draw invisible text. 873 */ 874 bool canSkipText(const SkPaint* paint) const; 875 876 /** 877 * Enable or disable blending as necessary. This function sets the appropriate 878 * blend function based on the specified xfermode. 879 */ 880 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 881 bool swapSrcDst = false); 882 883 /** 884 * Invoked before any drawing operation. This sets required state. 885 */ 886 void setupDraw(bool clear = true); 887 888 /** 889 * Various methods to setup OpenGL rendering. 890 */ 891 void setupDrawWithTexture(bool isAlpha8 = false); 892 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 893 void setupDrawWithExternalTexture(); 894 void setupDrawNoTexture(); 895 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 896 void setupDrawColor(int color, int alpha); 897 void setupDrawColor(float r, float g, float b, float a); 898 void setupDrawAlpha8Color(int color, int alpha); 899 void setupDrawTextGamma(const SkPaint* paint); 900 void setupDrawShader(const SkShader* shader); 901 void setupDrawColorFilter(const SkColorFilter* filter); 902 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 903 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 904 void setupDrawProgram(); 905 void setupDrawDirtyRegionsDisabled(); 906 907 /** 908 * Setup the current program matrices based upon the nature of the geometry. 909 * 910 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 911 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 912 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 913 * transformations are stored in the modelView matrix and uploaded to the shader. 914 * 915 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 916 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 917 * 918 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 919 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 920 * or when simple translation has been extracted) 921 */ 922 void setupDrawModelView(ModelViewMode mode, bool offset, 923 float left, float top, float right, float bottom, bool ignoreTransform = false); 924 void setupDrawColorUniforms(bool hasShader); 925 void setupDrawPureColorUniforms(); 926 927 /** 928 * Setup uniforms for the current shader. 929 * 930 * @param shader SkShader on the current paint. 931 * 932 * @param ignoreTransform Set to true to ignore the transform in shader. 933 */ 934 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 935 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 936 void setupDrawSimpleMesh(); 937 void setupDrawTexture(GLuint texture); 938 void setupDrawExternalTexture(GLuint texture); 939 void setupDrawTextureTransform(); 940 void setupDrawTextureTransformUniforms(mat4& transform); 941 void setupDrawTextGammaUniforms(); 942 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 943 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 944 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 945 void setupDrawIndexedVertices(GLvoid* vertices); 946 void accountForClear(SkXfermode::Mode mode); 947 948 bool updateLayer(Layer* layer, bool inFrame); 949 void updateLayers(); 950 void flushLayers(); 951 952#if DEBUG_LAYERS_AS_REGIONS 953 /** 954 * Renders the specified region as a series of rectangles. This method 955 * is used for debugging only. 956 */ 957 void drawRegionRectsDebug(const Region& region); 958#endif 959 960 /** 961 * Renders the specified region as a series of rectangles. The region 962 * must be in screen-space coordinates. 963 */ 964 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 965 966 /** 967 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 968 * is turned on. 969 */ 970 void debugClip(); 971 972 void debugOverdraw(bool enable, bool clear); 973 void renderOverdraw(); 974 void countOverdraw(); 975 976 /** 977 * Should be invoked every time the glScissor is modified. 978 */ 979 inline void dirtyClip() { mState.setDirtyClip(true); } 980 981 inline const UvMapper& getMapper(const Texture* texture) { 982 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 983 } 984 985 /** 986 * Returns a texture object for the specified bitmap. The texture can 987 * come from the texture cache or an atlas. If this method returns 988 * NULL, the texture could not be found and/or allocated. 989 */ 990 Texture* getTexture(const SkBitmap* bitmap); 991 992 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 993 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 994 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 995 996 /** 997 * Model-view matrix used to position/size objects 998 * 999 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 1000 * currentTransform(). 1001 * 1002 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 1003 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 1004 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 1005 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 1006 * of a bitmap. 1007 * 1008 * Used as input to SkiaShader transformation. 1009 */ 1010 mat4 mModelViewMatrix; 1011 1012 // State used to define the clipping region 1013 Rect mTilingClip; 1014 // Is the target render surface opaque 1015 bool mOpaque; 1016 // Is a frame currently being rendered 1017 bool mFrameStarted; 1018 1019 // Used to draw textured quads 1020 TextureVertex mMeshVertices[4]; 1021 1022 // Default UV mapper 1023 const UvMapper mUvMapper; 1024 1025 // shader, filters, and shadow 1026 DrawModifiers mDrawModifiers; 1027 SkPaint mFilteredPaint; 1028 1029 // List of rectangles to clear after saveLayer() is invoked 1030 std::vector<Rect> mLayers; 1031 // List of layers to update at the beginning of a frame 1032 Vector< sp<Layer> > mLayerUpdates; 1033 1034 // The following fields are used to setup drawing 1035 // Used to describe the shaders to generate 1036 ProgramDescription mDescription; 1037 // Color description 1038 bool mColorSet; 1039 FloatColor mColor; 1040 // Indicates that the shader should get a color 1041 bool mSetShaderColor; 1042 // Current texture unit 1043 GLuint mTextureUnit; 1044 // Track dirty regions, true by default 1045 bool mTrackDirtyRegions; 1046 // Indicate whether we are drawing an opaque frame 1047 bool mOpaqueFrame; 1048 1049 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1050 // Properties.h 1051 bool mScissorOptimizationDisabled; 1052 1053 // No-ops start/endTiling when set 1054 bool mSuppressTiling; 1055 bool mFirstFrameAfterResize; 1056 1057 bool mSkipOutlineClip; 1058 1059 // True if anything has been drawn since the last call to 1060 // reportAndClearDirty() 1061 bool mDirty; 1062 1063 // Lighting + shadows 1064 Vector3 mLightCenter; 1065 float mLightRadius; 1066 uint8_t mAmbientShadowAlpha; 1067 uint8_t mSpotShadowAlpha; 1068 1069 // Paths kept alive for the duration of the frame 1070 std::vector<std::unique_ptr<SkPath>> mTempPaths; 1071 1072 friend class Layer; 1073 friend class TextSetupFunctor; 1074 friend class DrawBitmapOp; 1075 friend class DrawPatchOp; 1076 1077}; // class OpenGLRenderer 1078 1079}; // namespace uirenderer 1080}; // namespace android 1081 1082#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1083