OpenGLRenderer.h revision 117bdbcfa3e8306dad21e7e01fa71b00cdfa7265
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 <GLES2/gl2.h> 21#include <GLES2/gl2ext.h> 22 23#include <SkBitmap.h> 24#include <SkCanvas.h> 25#include <SkColorFilter.h> 26#include <SkMatrix.h> 27#include <SkPaint.h> 28#include <SkRegion.h> 29#include <SkXfermode.h> 30 31#include <utils/Blur.h> 32#include <utils/Functor.h> 33#include <utils/RefBase.h> 34#include <utils/SortedVector.h> 35#include <utils/Vector.h> 36 37#include <cutils/compiler.h> 38 39#include <androidfw/ResourceTypes.h> 40 41#include "CanvasState.h" 42#include "Debug.h" 43#include "Extensions.h" 44#include "Matrix.h" 45#include "Program.h" 46#include "Rect.h" 47#include "Renderer.h" 48#include "Snapshot.h" 49#include "UvMapper.h" 50#include "Vertex.h" 51#include "Caches.h" 52#include "utils/PaintUtils.h" 53 54class SkShader; 55 56namespace android { 57namespace uirenderer { 58 59class DeferredDisplayState; 60struct Glop; 61class RenderState; 62class RenderNode; 63class TextSetupFunctor; 64class VertexBuffer; 65 66struct DrawModifiers { 67 DrawModifiers() 68 : mOverrideLayerAlpha(0.0f) {} 69 70 void reset() { 71 mOverrideLayerAlpha = 0.0f; 72 } 73 74 float mOverrideLayerAlpha; 75}; 76 77enum StateDeferFlags { 78 kStateDeferFlag_Draw = 0x1, 79 kStateDeferFlag_Clip = 0x2 80}; 81 82enum ClipSideFlags { 83 kClipSide_None = 0x0, 84 kClipSide_Left = 0x1, 85 kClipSide_Top = 0x2, 86 kClipSide_Right = 0x4, 87 kClipSide_Bottom = 0x8, 88 kClipSide_Full = 0xF, 89 kClipSide_ConservativeFull = 0x1F 90}; 91 92enum VertexBufferDisplayFlags { 93 kVertexBuffer_Offset = 0x1, 94 kVertexBuffer_ShadowInterp = 0x2, 95}; 96 97/** 98 * Defines additional transformation that should be applied by the model view matrix, beyond that of 99 * the currentTransform() 100 */ 101enum ModelViewMode { 102 /** 103 * Used when the model view should simply translate geometry passed to the shader. The resulting 104 * matrix will be a simple translation. 105 */ 106 kModelViewMode_Translate = 0, 107 108 /** 109 * Used when the model view should translate and scale geometry. The resulting matrix will be a 110 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 111 */ 112 kModelViewMode_TranslateAndScale = 1, 113}; 114 115/////////////////////////////////////////////////////////////////////////////// 116// Renderer 117/////////////////////////////////////////////////////////////////////////////// 118/** 119 * OpenGL Renderer implementation. 120 */ 121class OpenGLRenderer : public Renderer, public CanvasStateClient { 122public: 123 OpenGLRenderer(RenderState& renderState); 124 virtual ~OpenGLRenderer(); 125 126 void initProperties(); 127 void initLight(const Vector3& lightCenter, float lightRadius, 128 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 129 130 virtual void prepareDirty(float left, float top, float right, float bottom, 131 bool opaque) override; 132 virtual void prepare(bool opaque) override { 133 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 134 } 135 virtual bool finish() override; 136 137 virtual void callDrawGLFunction(Functor* functor, Rect& dirty) override; 138 139 void pushLayerUpdate(Layer* layer); 140 void cancelLayerUpdate(Layer* layer); 141 void flushLayerUpdates(); 142 void markLayersAsBuildLayers(); 143 144 virtual int saveLayer(float left, float top, float right, float bottom, 145 const SkPaint* paint, int flags) override { 146 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 147 } 148 149 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 150 // created, which will in turn clip to that mask when drawn back/restored. 151 int saveLayer(float left, float top, float right, float bottom, 152 const SkPaint* paint, int flags, const SkPath* convexMask); 153 154 int saveLayerDeferred(float left, float top, float right, float bottom, 155 const SkPaint* paint, int flags); 156 157 virtual void drawRenderNode(RenderNode* displayList, Rect& dirty, 158 int32_t replayFlags = 1) override; 159 virtual void drawLayer(Layer* layer, float x, float y); 160 virtual void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) override; 161 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 162 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 163 virtual void drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 164 float srcRight, float srcBottom, float dstLeft, float dstTop, 165 float dstRight, float dstBottom, const SkPaint* paint) override; 166 virtual void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 167 const float* vertices, const int* colors, const SkPaint* paint) override; 168 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 169 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 170 virtual void drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 171 float left, float top, float right, float bottom, const SkPaint* paint) override; 172 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 173 float left, float top, float right, float bottom, const SkPaint* paint); 174 virtual void drawColor(int color, SkXfermode::Mode mode) override; 175 virtual void drawRect(float left, float top, float right, float bottom, 176 const SkPaint* paint) override; 177 virtual void drawRoundRect(float left, float top, float right, float bottom, 178 float rx, float ry, const SkPaint* paint) override; 179 virtual void drawCircle(float x, float y, float radius, const SkPaint* paint) override; 180 virtual void drawOval(float left, float top, float right, float bottom, 181 const SkPaint* paint) override; 182 virtual void drawArc(float left, float top, float right, float bottom, 183 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint) override; 184 virtual void drawPath(const SkPath* path, const SkPaint* paint) override; 185 virtual void drawLines(const float* points, int count, const SkPaint* paint) override; 186 virtual void drawPoints(const float* points, int count, const SkPaint* paint) override; 187 virtual void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 188 float hOffset, float vOffset, const SkPaint* paint) override; 189 virtual void drawPosText(const char* text, int bytesCount, int count, 190 const float* positions, const SkPaint* paint) override; 191 virtual void drawText(const char* text, int bytesCount, int count, float x, float y, 192 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 193 DrawOpMode drawOpMode = kDrawOpMode_Immediate) override; 194 virtual void drawRects(const float* rects, int count, const SkPaint* paint) override; 195 196 void drawShadow(float casterAlpha, 197 const VertexBuffer* ambientShadowVertexBuffer, 198 const VertexBuffer* spotShadowVertexBuffer); 199 200 virtual void setDrawFilter(SkDrawFilter* filter) override; 201 202 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 203 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 204 205 /** 206 * Store the current display state (most importantly, the current clip and transform), and 207 * additionally map the state's bounds from local to window coordinates. 208 * 209 * Returns true if quick-rejected 210 */ 211 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 212 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 213 void setupMergedMultiDraw(const Rect* clipRect); 214 215 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 216 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 217 218 bool isCurrentTransformSimple() { 219 return currentTransform()->isSimple(); 220 } 221 222 Caches& getCaches() { 223 return mCaches; 224 } 225 226 RenderState& renderState() { 227 return mRenderState; 228 } 229 230 int getViewportWidth() { return mState.getViewportWidth(); } 231 int getViewportHeight() { return mState.getViewportHeight(); } 232 233 /** 234 * Scales the alpha on the current snapshot. This alpha value will be modulated 235 * with other alpha values when drawing primitives. 236 */ 237 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 238 239 /** 240 * Inserts a named event marker in the stream of GL commands. 241 */ 242 void eventMark(const char* name) const; 243 244 /** 245 * Inserts a formatted event marker in the stream of GL commands. 246 */ 247 void eventMarkDEBUG(const char *fmt, ...) const; 248 249 /** 250 * Inserts a named group marker in the stream of GL commands. This marker 251 * can be used by tools to group commands into logical groups. A call to 252 * this method must always be followed later on by a call to endMark(). 253 */ 254 void startMark(const char* name) const; 255 256 /** 257 * Closes the last group marker opened by startMark(). 258 */ 259 void endMark() const; 260 261 /** 262 * Gets the alpha and xfermode out of a paint object. If the paint is null 263 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 264 * not multiply the paint's alpha by the current snapshot's alpha, and does 265 * not replace the alpha with the overrideLayerAlpha 266 * 267 * @param paint The paint to extract values from 268 * @param alpha Where to store the resulting alpha 269 * @param mode Where to store the resulting xfermode 270 */ 271 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 272 SkXfermode::Mode* mode) { 273 *mode = getXfermodeDirect(paint); 274 *alpha = getAlphaDirect(paint); 275 } 276 277 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 278 if (!paint) return SkXfermode::kSrcOver_Mode; 279 return PaintUtils::getXfermode(paint->getXfermode()); 280 } 281 282 static inline int getAlphaDirect(const SkPaint* paint) { 283 if (!paint) return 255; 284 return paint->getAlpha(); 285 } 286 287 struct TextShadow { 288 SkScalar radius; 289 float dx; 290 float dy; 291 SkColor color; 292 }; 293 294 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 295 SkDrawLooper::BlurShadowRec blur; 296 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 297 if (textShadow) { 298 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 299 textShadow->dx = blur.fOffset.fX; 300 textShadow->dy = blur.fOffset.fY; 301 textShadow->color = blur.fColor; 302 } 303 return true; 304 } 305 return false; 306 } 307 308 static inline bool hasTextShadow(const SkPaint* paint) { 309 return getTextShadow(paint, nullptr); 310 } 311 312 /** 313 * Build the best transform to use to rasterize text given a full 314 * transform matrix, and whether filteration is needed. 315 * 316 * Returns whether filtration is needed 317 */ 318 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 319 320#if DEBUG_MERGE_BEHAVIOR 321 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 322 mCaches.setScissorEnabled(false); 323 324 // should only be called outside of other draw ops, so stencil can only be in test state 325 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 326 mCaches.stencil.disable(); 327 328 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 329 330 if (stencilWasEnabled) mCaches.stencil.enableTest(); 331 mDirty = true; 332 } 333#endif 334 335 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 336 float getLightRadius() const { return mLightRadius; } 337 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 338 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 339 340 /////////////////////////////////////////////////////////////////// 341 /// State manipulation 342 343 virtual void setViewport(int width, int height) override { mState.setViewport(width, height); } 344 345 virtual int getSaveCount() const override; 346 virtual int save(int flags) override; 347 virtual void restore() override; 348 virtual void restoreToCount(int saveCount) override; 349 350 virtual void getMatrix(SkMatrix* outMatrix) const override { mState.getMatrix(outMatrix); } 351 virtual void setMatrix(const SkMatrix& matrix) override { mState.setMatrix(matrix); } 352 virtual void concatMatrix(const SkMatrix& matrix) override { mState.concatMatrix(matrix); } 353 354 virtual void translate(float dx, float dy, float dz = 0.0f) override; 355 virtual void rotate(float degrees) override; 356 virtual void scale(float sx, float sy) override; 357 virtual void skew(float sx, float sy) override; 358 359 void setMatrix(const Matrix4& matrix); // internal only convenience method 360 void concatMatrix(const Matrix4& matrix); // internal only convenience method 361 362 virtual const Rect& getLocalClipBounds() const override { return mState.getLocalClipBounds(); } 363 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 364 virtual bool quickRejectConservative(float left, float top, 365 float right, float bottom) const override { 366 return mState.quickRejectConservative(left, top, right, bottom); 367 } 368 369 virtual bool clipRect(float left, float top, 370 float right, float bottom, SkRegion::Op op) override; 371 virtual bool clipPath(const SkPath* path, SkRegion::Op op) override; 372 virtual bool clipRegion(const SkRegion* region, SkRegion::Op op) override; 373 374 /** 375 * Does not support different clipping Ops (that is, every call to setClippingOutline is 376 * effectively using SkRegion::kReplaceOp) 377 * 378 * The clipping outline is independent from the regular clip. 379 */ 380 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 381 void setClippingRoundRect(LinearAllocator& allocator, 382 const Rect& rect, float radius, bool highPriority = true); 383 384 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 385 inline const mat4* currentTransform() const { return mState.currentTransform(); } 386 387 /////////////////////////////////////////////////////////////////// 388 /// CanvasStateClient interface 389 390 virtual void onViewportInitialized() override; 391 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 392 virtual GLuint onGetTargetFbo() const override { return 0; } 393 394 SkPath* allocPathForFrame() { 395 std::unique_ptr<SkPath> path(new SkPath()); 396 SkPath* returnPath = path.get(); 397 mTempPaths.push_back(std::move(path)); 398 return returnPath; 399 } 400 401protected: 402 /** 403 * Perform the setup specific to a frame. This method does not 404 * issue any OpenGL commands. 405 */ 406 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 407 408 /** 409 * Indicates the start of rendering. This method will setup the 410 * initial OpenGL state (viewport, clearing the buffer, etc.) 411 */ 412 void startFrame(); 413 414 /** 415 * Clears the underlying surface if needed. 416 */ 417 virtual void clear(float left, float top, float right, float bottom, bool opaque); 418 419 /** 420 * Call this method after updating a layer during a drawing pass. 421 */ 422 void resumeAfterLayer(); 423 424 /** 425 * This method is called whenever a stencil buffer is required. Subclasses 426 * should override this method and call attachStencilBufferToLayer() on the 427 * appropriate layer(s). 428 */ 429 virtual void ensureStencilBuffer(); 430 431 /** 432 * Obtains a stencil render buffer (allocating it if necessary) and 433 * attaches it to the specified layer. 434 */ 435 void attachStencilBufferToLayer(Layer* layer); 436 437 /** 438 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 439 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 440 * in the list. 441 */ 442 void drawRectangleList(const RectangleList& rectangleList); 443 444 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 445 const SkPaint* paint = nullptr); 446 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 447 return quickRejectSetupScissor(bounds.left, bounds.top, 448 bounds.right, bounds.bottom, paint); 449 } 450 451 /** 452 * Compose the layer defined in the current snapshot with the layer 453 * defined by the previous snapshot. 454 * 455 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 456 * 457 * @param curent The current snapshot containing the layer to compose 458 * @param previous The previous snapshot to compose the current layer with 459 */ 460 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 461 462 /** 463 * Marks the specified region as dirty at the specified bounds. 464 */ 465 void dirtyLayerUnchecked(Rect& bounds, Region* region); 466 467 /** 468 * Returns the region of the current layer. 469 */ 470 virtual Region* getRegion() const { 471 return mState.currentRegion(); 472 } 473 474 /** 475 * Indicates whether rendering is currently targeted at a layer. 476 */ 477 virtual bool hasLayer() const { 478 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 479 } 480 481 482 /** 483 * Renders the specified layer as a textured quad. 484 * 485 * @param layer The layer to render 486 * @param rect The bounds of the layer 487 */ 488 void drawTextureLayer(Layer* layer, const Rect& rect); 489 490 /** 491 * Gets the alpha and xfermode out of a paint object. If the paint is null 492 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 493 * snapshot alpha, and overrideLayerAlpha 494 * 495 * @param paint The paint to extract values from 496 * @param alpha Where to store the resulting alpha 497 * @param mode Where to store the resulting xfermode 498 */ 499 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 500 501 /** 502 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 503 * 504 * @param layer The layer from which the alpha is extracted 505 */ 506 inline float getLayerAlpha(const Layer* layer) const; 507 508 /** 509 * Safely retrieves the ColorFilter from the given Paint. If the paint is 510 * null then null is returned. 511 */ 512 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 513 return paint ? paint->getColorFilter() : nullptr; 514 } 515 516 /** 517 * Safely retrieves the Shader from the given Paint. If the paint is 518 * null then null is returned. 519 */ 520 static inline const SkShader* getShader(const SkPaint* paint) { 521 return paint ? paint->getShader() : nullptr; 522 } 523 524 /** 525 * Set to true to suppress error checks at the end of a frame. 526 */ 527 virtual bool suppressErrorChecks() const { 528 return false; 529 } 530 531 CanvasState mState; 532 Caches& mCaches; 533 RenderState& mRenderState; 534 535private: 536 void renderGlop(const Glop& glop); 537 538 /** 539 * Discards the content of the framebuffer if supported by the driver. 540 * This method should be called at the beginning of a frame to optimize 541 * rendering on some tiler architectures. 542 */ 543 void discardFramebuffer(float left, float top, float right, float bottom); 544 545 /** 546 * Tells the GPU what part of the screen is about to be redrawn. 547 * This method will use the current layer space clip rect. 548 * This method needs to be invoked every time getTargetFbo() is 549 * bound again. 550 */ 551 void startTilingCurrentClip(bool opaque = false, bool expand = false); 552 553 /** 554 * Tells the GPU what part of the screen is about to be redrawn. 555 * This method needs to be invoked every time getTargetFbo() is 556 * bound again. 557 */ 558 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 559 560 /** 561 * Tells the GPU that we are done drawing the frame or that we 562 * are switching to another render target. 563 */ 564 void endTiling(); 565 566 /** 567 * Sets the clipping rectangle using glScissor. The clip is defined by 568 * the current snapshot's clipRect member. 569 */ 570 void setScissorFromClip(); 571 572 /** 573 * Sets the clipping region using the stencil buffer. The clip region 574 * is defined by the current snapshot's clipRegion member. 575 */ 576 void setStencilFromClip(); 577 578 /** 579 * Given the local bounds of the layer, calculates ... 580 */ 581 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 582 583 /** 584 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 585 */ 586 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 587 bool fboLayer, int alpha); 588 589 /** 590 * Creates a new layer stored in the specified snapshot. 591 * 592 * @param snapshot The snapshot associated with the new layer 593 * @param left The left coordinate of the layer 594 * @param top The top coordinate of the layer 595 * @param right The right coordinate of the layer 596 * @param bottom The bottom coordinate of the layer 597 * @param alpha The translucency of the layer 598 * @param mode The blending mode of the layer 599 * @param flags The layer save flags 600 * @param mask A mask to use when drawing the layer back, may be empty 601 * 602 * @return True if the layer was successfully created, false otherwise 603 */ 604 bool createLayer(float left, float top, float right, float bottom, 605 const SkPaint* paint, int flags, const SkPath* convexMask); 606 607 /** 608 * Creates a new layer stored in the specified snapshot as an FBO. 609 * 610 * @param layer The layer to store as an FBO 611 * @param snapshot The snapshot associated with the new layer 612 * @param bounds The bounds of the layer 613 */ 614 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 615 616 /** 617 * Compose the specified layer as a region. 618 * 619 * @param layer The layer to compose 620 * @param rect The layer's bounds 621 */ 622 void composeLayerRegion(Layer* layer, const Rect& rect); 623 624 /** 625 * Compose the specified layer as a simple rectangle. 626 * 627 * @param layer The layer to compose 628 * @param rect The layer's bounds 629 * @param swap If true, the source and destination are swapped 630 */ 631 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 632 633 /** 634 * Clears all the regions corresponding to the current list of layers. 635 * This method MUST be invoked before any drawing operation. 636 */ 637 void clearLayerRegions(); 638 639 /** 640 * Mark the layer as dirty at the specified coordinates. The coordinates 641 * are transformed with the supplied matrix. 642 */ 643 void dirtyLayer(const float left, const float top, 644 const float right, const float bottom, const mat4 transform); 645 646 /** 647 * Mark the layer as dirty at the specified coordinates. 648 */ 649 void dirtyLayer(const float left, const float top, 650 const float right, const float bottom); 651 652 /** 653 * Draws a colored rectangle with the specified color. The specified coordinates 654 * are transformed by the current snapshot's transform matrix unless specified 655 * otherwise. 656 * 657 * @param left The left coordinate of the rectangle 658 * @param top The top coordinate of the rectangle 659 * @param right The right coordinate of the rectangle 660 * @param bottom The bottom coordinate of the rectangle 661 * @param paint The paint containing the color, blending mode, etc. 662 * @param ignoreTransform True if the current transform should be ignored 663 */ 664 void drawColorRect(float left, float top, float right, float bottom, 665 const SkPaint* paint, bool ignoreTransform = false); 666 667 /** 668 * Draws a series of colored rectangles with the specified color. The specified 669 * coordinates are transformed by the current snapshot's transform matrix unless 670 * specified otherwise. 671 * 672 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 673 * per rectangle 674 * @param paint The paint containing the color, blending mode, etc. 675 * @param ignoreTransform True if the current transform should be ignored 676 * @param dirty True if calling this method should dirty the current layer 677 * @param clip True if the rects should be clipped, false otherwise 678 */ 679 void drawColorRects(const float* rects, int count, const SkPaint* paint, 680 bool ignoreTransform = false, bool dirty = true, bool clip = true); 681 682 /** 683 * Draws the shape represented by the specified path texture. 684 * This method invokes drawPathTexture() but takes into account 685 * the extra left/top offset and the texture offset to correctly 686 * position the final shape. 687 * 688 * @param left The left coordinate of the shape to render 689 * @param top The top coordinate of the shape to render 690 * @param texture The texture reprsenting the shape 691 * @param paint The paint to draw the shape with 692 */ 693 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 694 695 /** 696 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 697 * different compositing rules. 698 * 699 * @param texture The texture to draw with 700 * @param left The x coordinate of the bitmap 701 * @param top The y coordinate of the bitmap 702 * @param paint The paint to render with 703 */ 704 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 705 706 /** 707 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 708 * 709 * @param vertexBuffer The VertexBuffer to be drawn 710 * @param paint The paint to render with 711 * @param flags flags with which to draw 712 */ 713 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 714 const SkPaint* paint, int flags = 0); 715 716 /** 717 * Convenience for translating method 718 */ 719 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 720 const SkPaint* paint, int flags = 0) { 721 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 722 } 723 724 /** 725 * Renders the convex hull defined by the specified path as a strip of polygons. 726 * 727 * @param path The hull of the path to draw 728 * @param paint The paint to render with 729 */ 730 void drawConvexPath(const SkPath& path, const SkPaint* paint); 731 732 /** 733 * Draws a textured rectangle with the specified texture. The specified coordinates 734 * are transformed by the current snapshot's transform matrix. 735 * 736 * @param left The left coordinate of the rectangle 737 * @param top The top coordinate of the rectangle 738 * @param right The right coordinate of the rectangle 739 * @param bottom The bottom coordinate of the rectangle 740 * @param texture The texture to use 741 * @param paint The paint containing the alpha, blending mode, etc. 742 */ 743 void drawTextureRect(float left, float top, float right, float bottom, 744 Texture* texture, const SkPaint* paint); 745 746 /** 747 * Draws a textured mesh with the specified texture. If the indices are omitted, 748 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 749 * VBO is bound. 750 * 751 * @param left The left coordinate of the rectangle 752 * @param top The top coordinate of the rectangle 753 * @param right The right coordinate of the rectangle 754 * @param bottom The bottom coordinate of the rectangle 755 * @param texture The texture name to map onto the rectangle 756 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 757 * @param blend True if the texture contains an alpha channel 758 * @param vertices The vertices that define the mesh 759 * @param texCoords The texture coordinates of each vertex 760 * @param elementsCount The number of elements in the mesh, required by indices 761 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 762 * @param ignoreTransform True if the current transform should be ignored 763 * @param vbo The VBO used to draw the mesh 764 * @param modelViewMode Defines whether the model view matrix should be scaled 765 * @param dirty True if calling this method should dirty the current layer 766 */ 767 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 768 const SkPaint* paint, bool blend, 769 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 770 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 771 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 772 773 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 774 const SkPaint* paint, bool blend, 775 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 776 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 777 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 778 779 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 780 GLuint texture, const SkPaint* paint, 781 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 782 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 783 bool dirty = true); 784 785 /** 786 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 787 * If the number of vertices to draw exceeds the number of indices we have 788 * pre-allocated, this method will generate several glDrawElements() calls. 789 */ 790 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 791 792 /** 793 * Draws text underline and strike-through if needed. 794 * 795 * @param text The text to decor 796 * @param bytesCount The number of bytes in the text 797 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 798 * @param x The x coordinate where the text will be drawn 799 * @param y The y coordinate where the text will be drawn 800 * @param paint The paint to draw the text with 801 */ 802 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 803 804 /** 805 * Draws shadow layer on text (with optional positions). 806 * 807 * @param paint The paint to draw the shadow with 808 * @param text The text to draw 809 * @param bytesCount The number of bytes in the text 810 * @param count The number of glyphs in the text 811 * @param positions The x, y positions of individual glyphs (or NULL) 812 * @param fontRenderer The font renderer object 813 * @param alpha The alpha value for drawing the shadow 814 * @param x The x coordinate where the shadow will be drawn 815 * @param y The y coordinate where the shadow will be drawn 816 */ 817 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 818 const float* positions, FontRenderer& fontRenderer, int alpha, 819 float x, float y); 820 821 /** 822 * Draws a path texture. Path textures are alpha8 bitmaps that need special 823 * compositing to apply colors/filters/etc. 824 * 825 * @param texture The texture to render 826 * @param x The x coordinate where the texture will be drawn 827 * @param y The y coordinate where the texture will be drawn 828 * @param paint The paint to draw the texture with 829 */ 830 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 831 832 /** 833 * Resets the texture coordinates stored in mMeshVertices. Setting the values 834 * back to default is achieved by calling: 835 * 836 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 837 * 838 * @param u1 The left coordinate of the texture 839 * @param v1 The bottom coordinate of the texture 840 * @param u2 The right coordinate of the texture 841 * @param v2 The top coordinate of the texture 842 */ 843 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 844 845 /** 846 * Returns true if the specified paint will draw invisible text. 847 */ 848 bool canSkipText(const SkPaint* paint) const; 849 850 /** 851 * Enable or disable blending as necessary. This function sets the appropriate 852 * blend function based on the specified xfermode. 853 */ 854 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 855 bool swapSrcDst = false); 856 857 /** 858 * Invoked before any drawing operation. This sets required state. 859 */ 860 void setupDraw(bool clear = true); 861 862 /** 863 * Various methods to setup OpenGL rendering. 864 */ 865 void setupDrawWithTexture(bool isAlpha8 = false); 866 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 867 void setupDrawWithExternalTexture(); 868 void setupDrawNoTexture(); 869 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 870 void setupDrawColor(int color, int alpha); 871 void setupDrawColor(float r, float g, float b, float a); 872 void setupDrawAlpha8Color(int color, int alpha); 873 void setupDrawTextGamma(const SkPaint* paint); 874 void setupDrawShader(const SkShader* shader); 875 void setupDrawColorFilter(const SkColorFilter* filter); 876 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 877 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 878 void setupDrawProgram(); 879 void setupDrawDirtyRegionsDisabled(); 880 881 /** 882 * Setup the current program matrices based upon the nature of the geometry. 883 * 884 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 885 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 886 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 887 * transformations are stored in the modelView matrix and uploaded to the shader. 888 * 889 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 890 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 891 * 892 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 893 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 894 * or when simple translation has been extracted) 895 */ 896 void setupDrawModelView(ModelViewMode mode, bool offset, 897 float left, float top, float right, float bottom, bool ignoreTransform = false); 898 void setupDrawColorUniforms(bool hasShader); 899 void setupDrawPureColorUniforms(); 900 901 /** 902 * Setup uniforms for the current shader. 903 * 904 * @param shader SkShader on the current paint. 905 * 906 * @param ignoreTransform Set to true to ignore the transform in shader. 907 */ 908 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 909 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 910 void setupDrawSimpleMesh(); 911 void setupDrawTexture(GLuint texture); 912 void setupDrawExternalTexture(GLuint texture); 913 void setupDrawTextureTransform(); 914 void setupDrawTextureTransformUniforms(mat4& transform); 915 void setupDrawTextGammaUniforms(); 916 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 917 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 918 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 919 void setupDrawIndexedVertices(GLvoid* vertices); 920 void accountForClear(SkXfermode::Mode mode); 921 922 bool updateLayer(Layer* layer, bool inFrame); 923 void updateLayers(); 924 void flushLayers(); 925 926#if DEBUG_LAYERS_AS_REGIONS 927 /** 928 * Renders the specified region as a series of rectangles. This method 929 * is used for debugging only. 930 */ 931 void drawRegionRectsDebug(const Region& region); 932#endif 933 934 /** 935 * Renders the specified region as a series of rectangles. The region 936 * must be in screen-space coordinates. 937 */ 938 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 939 940 /** 941 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 942 * is turned on. 943 */ 944 void debugClip(); 945 946 void debugOverdraw(bool enable, bool clear); 947 void renderOverdraw(); 948 void countOverdraw(); 949 950 /** 951 * Should be invoked every time the glScissor is modified. 952 */ 953 inline void dirtyClip() { mState.setDirtyClip(true); } 954 955 inline const UvMapper& getMapper(const Texture* texture) { 956 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 957 } 958 959 /** 960 * Returns a texture object for the specified bitmap. The texture can 961 * come from the texture cache or an atlas. If this method returns 962 * NULL, the texture could not be found and/or allocated. 963 */ 964 Texture* getTexture(const SkBitmap* bitmap); 965 966 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 967 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 968 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 969 970 /** 971 * Model-view matrix used to position/size objects 972 * 973 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 974 * currentTransform(). 975 * 976 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 977 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 978 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 979 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 980 * of a bitmap. 981 * 982 * Used as input to SkiaShader transformation. 983 */ 984 mat4 mModelViewMatrix; 985 986 // State used to define the clipping region 987 Rect mTilingClip; 988 // Is the target render surface opaque 989 bool mOpaque; 990 // Is a frame currently being rendered 991 bool mFrameStarted; 992 993 // Used to draw textured quads 994 TextureVertex mMeshVertices[4]; 995 996 // Default UV mapper 997 const UvMapper mUvMapper; 998 999 // shader, filters, and shadow 1000 DrawModifiers mDrawModifiers; 1001 SkPaint mFilteredPaint; 1002 1003 // List of rectangles to clear after saveLayer() is invoked 1004 std::vector<Rect> mLayers; 1005 // List of layers to update at the beginning of a frame 1006 Vector< sp<Layer> > mLayerUpdates; 1007 1008 // The following fields are used to setup drawing 1009 // Used to describe the shaders to generate 1010 ProgramDescription mDescription; 1011 // Color description 1012 bool mColorSet; 1013 float mColorA, mColorR, mColorG, mColorB; 1014 // Indicates that the shader should get a color 1015 bool mSetShaderColor; 1016 // Current texture unit 1017 GLuint mTextureUnit; 1018 // Track dirty regions, true by default 1019 bool mTrackDirtyRegions; 1020 // Indicate whether we are drawing an opaque frame 1021 bool mOpaqueFrame; 1022 1023 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1024 // Properties.h 1025 bool mScissorOptimizationDisabled; 1026 1027 // No-ops start/endTiling when set 1028 bool mSuppressTiling; 1029 bool mFirstFrameAfterResize; 1030 1031 bool mSkipOutlineClip; 1032 1033 // True if anything has been drawn since the last call to 1034 // reportAndClearDirty() 1035 bool mDirty; 1036 1037 // Lighting + shadows 1038 Vector3 mLightCenter; 1039 float mLightRadius; 1040 uint8_t mAmbientShadowAlpha; 1041 uint8_t mSpotShadowAlpha; 1042 1043 // Paths kept alive for the duration of the frame 1044 std::vector<std::unique_ptr<SkPath>> mTempPaths; 1045 1046 friend class Layer; 1047 friend class TextSetupFunctor; 1048 friend class DrawBitmapOp; 1049 friend class DrawPatchOp; 1050 1051}; // class OpenGLRenderer 1052 1053}; // namespace uirenderer 1054}; // namespace android 1055 1056#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1057