OpenGLRenderer.h revision 65fe5eeb19e2e15c8b1ee91e8a2dcf0c25e48ca6
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; 60class RenderState; 61class RenderNode; 62class TextSetupFunctor; 63class VertexBuffer; 64 65struct DrawModifiers { 66 DrawModifiers() 67 : mOverrideLayerAlpha(0.0f) {} 68 69 void reset() { 70 mOverrideLayerAlpha = 0.0f; 71 } 72 73 float mOverrideLayerAlpha; 74}; 75 76enum StateDeferFlags { 77 kStateDeferFlag_Draw = 0x1, 78 kStateDeferFlag_Clip = 0x2 79}; 80 81enum ClipSideFlags { 82 kClipSide_None = 0x0, 83 kClipSide_Left = 0x1, 84 kClipSide_Top = 0x2, 85 kClipSide_Right = 0x4, 86 kClipSide_Bottom = 0x8, 87 kClipSide_Full = 0xF, 88 kClipSide_ConservativeFull = 0x1F 89}; 90 91enum VertexBufferDisplayFlags { 92 kVertexBuffer_Offset = 0x1, 93 kVertexBuffer_ShadowInterp = 0x2, 94}; 95 96/** 97 * Defines additional transformation that should be applied by the model view matrix, beyond that of 98 * the currentTransform() 99 */ 100enum ModelViewMode { 101 /** 102 * Used when the model view should simply translate geometry passed to the shader. The resulting 103 * matrix will be a simple translation. 104 */ 105 kModelViewMode_Translate = 0, 106 107 /** 108 * Used when the model view should translate and scale geometry. The resulting matrix will be a 109 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 110 */ 111 kModelViewMode_TranslateAndScale = 1, 112}; 113 114/////////////////////////////////////////////////////////////////////////////// 115// Renderer 116/////////////////////////////////////////////////////////////////////////////// 117/** 118 * OpenGL Renderer implementation. 119 */ 120class OpenGLRenderer : public Renderer, public CanvasStateClient { 121public: 122 OpenGLRenderer(RenderState& renderState); 123 virtual ~OpenGLRenderer(); 124 125 void initProperties(); 126 void initLight(const Vector3& lightCenter, float lightRadius, 127 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 128 129 virtual void prepareDirty(float left, float top, float right, float bottom, 130 bool opaque) override; 131 virtual void prepare(bool opaque) override { 132 prepareDirty(0.0f, 0.0f, mState.getWidth(), mState.getHeight(), opaque); 133 } 134 virtual bool finish() override; 135 136 virtual void callDrawGLFunction(Functor* functor, Rect& dirty) override; 137 138 void pushLayerUpdate(Layer* layer); 139 void cancelLayerUpdate(Layer* layer); 140 void flushLayerUpdates(); 141 void markLayersAsBuildLayers(); 142 143 virtual int saveLayer(float left, float top, float right, float bottom, 144 const SkPaint* paint, int flags) override { 145 return saveLayer(left, top, right, bottom, paint, flags, nullptr); 146 } 147 148 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 149 // created, which will in turn clip to that mask when drawn back/restored. 150 int saveLayer(float left, float top, float right, float bottom, 151 const SkPaint* paint, int flags, const SkPath* convexMask); 152 153 int saveLayerDeferred(float left, float top, float right, float bottom, 154 const SkPaint* paint, int flags); 155 156 virtual void drawRenderNode(RenderNode* displayList, Rect& dirty, 157 int32_t replayFlags = 1) override; 158 virtual void drawLayer(Layer* layer, float x, float y); 159 virtual void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) override; 160 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 161 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 162 virtual void drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 163 float srcRight, float srcBottom, float dstLeft, float dstTop, 164 float dstRight, float dstBottom, const SkPaint* paint) override; 165 virtual void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 166 const float* vertices, const int* colors, const SkPaint* paint) override; 167 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 168 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 169 virtual void drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 170 float left, float top, float right, float bottom, const SkPaint* paint) override; 171 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 172 float left, float top, float right, float bottom, const SkPaint* paint); 173 virtual void drawColor(int color, SkXfermode::Mode mode) override; 174 virtual void drawRect(float left, float top, float right, float bottom, 175 const SkPaint* paint) override; 176 virtual void drawRoundRect(float left, float top, float right, float bottom, 177 float rx, float ry, const SkPaint* paint) override; 178 virtual void drawCircle(float x, float y, float radius, const SkPaint* paint) override; 179 virtual void drawOval(float left, float top, float right, float bottom, 180 const SkPaint* paint) override; 181 virtual void drawArc(float left, float top, float right, float bottom, 182 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint) override; 183 virtual void drawPath(const SkPath* path, const SkPaint* paint) override; 184 virtual void drawLines(const float* points, int count, const SkPaint* paint) override; 185 virtual void drawPoints(const float* points, int count, const SkPaint* paint) override; 186 virtual void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 187 float hOffset, float vOffset, const SkPaint* paint) override; 188 virtual void drawPosText(const char* text, int bytesCount, int count, 189 const float* positions, const SkPaint* paint) override; 190 virtual void drawText(const char* text, int bytesCount, int count, float x, float y, 191 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 192 DrawOpMode drawOpMode = kDrawOpMode_Immediate) override; 193 virtual void drawRects(const float* rects, int count, const SkPaint* paint) override; 194 195 void drawShadow(float casterAlpha, 196 const VertexBuffer* ambientShadowVertexBuffer, 197 const VertexBuffer* spotShadowVertexBuffer); 198 199 virtual void setDrawFilter(SkDrawFilter* filter) override; 200 201 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 202 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 203 204 /** 205 * Store the current display state (most importantly, the current clip and transform), and 206 * additionally map the state's bounds from local to window coordinates. 207 * 208 * Returns true if quick-rejected 209 */ 210 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 211 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 212 void setupMergedMultiDraw(const Rect* clipRect); 213 214 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 215 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 216 217 bool isCurrentTransformSimple() { 218 return currentTransform()->isSimple(); 219 } 220 221 Caches& getCaches() { 222 return mCaches; 223 } 224 225 RenderState& renderState() { 226 return mRenderState; 227 } 228 229 int getViewportWidth() { return mState.getViewportWidth(); } 230 int getViewportHeight() { return mState.getViewportHeight(); } 231 232 /** 233 * Scales the alpha on the current snapshot. This alpha value will be modulated 234 * with other alpha values when drawing primitives. 235 */ 236 void scaleAlpha(float alpha) { mState.scaleAlpha(alpha); } 237 238 /** 239 * Inserts a named event marker in the stream of GL commands. 240 */ 241 void eventMark(const char* name) const; 242 243 /** 244 * Inserts a formatted event marker in the stream of GL commands. 245 */ 246 void eventMarkDEBUG(const char *fmt, ...) const; 247 248 /** 249 * Inserts a named group marker in the stream of GL commands. This marker 250 * can be used by tools to group commands into logical groups. A call to 251 * this method must always be followed later on by a call to endMark(). 252 */ 253 void startMark(const char* name) const; 254 255 /** 256 * Closes the last group marker opened by startMark(). 257 */ 258 void endMark() const; 259 260 /** 261 * Gets the alpha and xfermode out of a paint object. If the paint is null 262 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 263 * not multiply the paint's alpha by the current snapshot's alpha, and does 264 * not replace the alpha with the overrideLayerAlpha 265 * 266 * @param paint The paint to extract values from 267 * @param alpha Where to store the resulting alpha 268 * @param mode Where to store the resulting xfermode 269 */ 270 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, 271 SkXfermode::Mode* mode) { 272 *mode = getXfermodeDirect(paint); 273 *alpha = getAlphaDirect(paint); 274 } 275 276 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 277 if (!paint) return SkXfermode::kSrcOver_Mode; 278 return PaintUtils::getXfermode(paint->getXfermode()); 279 } 280 281 static inline int getAlphaDirect(const SkPaint* paint) { 282 if (!paint) return 255; 283 return paint->getAlpha(); 284 } 285 286 struct TextShadow { 287 SkScalar radius; 288 float dx; 289 float dy; 290 SkColor color; 291 }; 292 293 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 294 SkDrawLooper::BlurShadowRec blur; 295 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 296 if (textShadow) { 297 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 298 textShadow->dx = blur.fOffset.fX; 299 textShadow->dy = blur.fOffset.fY; 300 textShadow->color = blur.fColor; 301 } 302 return true; 303 } 304 return false; 305 } 306 307 static inline bool hasTextShadow(const SkPaint* paint) { 308 return getTextShadow(paint, nullptr); 309 } 310 311 /** 312 * Build the best transform to use to rasterize text given a full 313 * transform matrix, and whether filteration is needed. 314 * 315 * Returns whether filtration is needed 316 */ 317 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 318 319#if DEBUG_MERGE_BEHAVIOR 320 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 321 mCaches.setScissorEnabled(false); 322 323 // should only be called outside of other draw ops, so stencil can only be in test state 324 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 325 mCaches.stencil.disable(); 326 327 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 328 329 if (stencilWasEnabled) mCaches.stencil.enableTest(); 330 mDirty = true; 331 } 332#endif 333 334 const Vector3& getLightCenter() const { return mState.currentLightCenter(); } 335 float getLightRadius() const { return mLightRadius; } 336 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 337 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 338 339 /////////////////////////////////////////////////////////////////// 340 /// State manipulation 341 342 virtual void setViewport(int width, int height) override { mState.setViewport(width, height); } 343 344 virtual int getSaveCount() const override; 345 virtual int save(int flags) override; 346 virtual void restore() override; 347 virtual void restoreToCount(int saveCount) override; 348 349 virtual void getMatrix(SkMatrix* outMatrix) const override { mState.getMatrix(outMatrix); } 350 virtual void setMatrix(const SkMatrix& matrix) override { mState.setMatrix(matrix); } 351 virtual void concatMatrix(const SkMatrix& matrix) override { mState.concatMatrix(matrix); } 352 353 virtual void translate(float dx, float dy, float dz = 0.0f) override; 354 virtual void rotate(float degrees) override; 355 virtual void scale(float sx, float sy) override; 356 virtual void skew(float sx, float sy) override; 357 358 void setMatrix(const Matrix4& matrix); // internal only convenience method 359 void concatMatrix(const Matrix4& matrix); // internal only convenience method 360 361 virtual const Rect& getLocalClipBounds() const override { return mState.getLocalClipBounds(); } 362 const Rect& getRenderTargetClipBounds() const { return mState.getRenderTargetClipBounds(); } 363 virtual bool quickRejectConservative(float left, float top, 364 float right, float bottom) const override { 365 return mState.quickRejectConservative(left, top, right, bottom); 366 } 367 368 virtual bool clipRect(float left, float top, 369 float right, float bottom, SkRegion::Op op) override; 370 virtual bool clipPath(const SkPath* path, SkRegion::Op op) override; 371 virtual bool clipRegion(const SkRegion* region, SkRegion::Op op) override; 372 373 /** 374 * Does not support different clipping Ops (that is, every call to setClippingOutline is 375 * effectively using SkRegion::kReplaceOp) 376 * 377 * The clipping outline is independent from the regular clip. 378 */ 379 void setClippingOutline(LinearAllocator& allocator, const Outline* outline); 380 void setClippingRoundRect(LinearAllocator& allocator, 381 const Rect& rect, float radius, bool highPriority = true); 382 383 inline bool hasRectToRectTransform() const { return mState.hasRectToRectTransform(); } 384 inline const mat4* currentTransform() const { return mState.currentTransform(); } 385 386 /////////////////////////////////////////////////////////////////// 387 /// CanvasStateClient interface 388 389 virtual void onViewportInitialized() override; 390 virtual void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored) override; 391 virtual GLuint onGetTargetFbo() const override { return 0; } 392 393 SkPath* allocPathForFrame() { 394 std::unique_ptr<SkPath> path(new SkPath()); 395 SkPath* returnPath = path.get(); 396 mTempPaths.push_back(std::move(path)); 397 return returnPath; 398 } 399 400protected: 401 /** 402 * Perform the setup specific to a frame. This method does not 403 * issue any OpenGL commands. 404 */ 405 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 406 407 /** 408 * Indicates the start of rendering. This method will setup the 409 * initial OpenGL state (viewport, clearing the buffer, etc.) 410 */ 411 void startFrame(); 412 413 /** 414 * Clears the underlying surface if needed. 415 */ 416 virtual void clear(float left, float top, float right, float bottom, bool opaque); 417 418 /** 419 * Call this method after updating a layer during a drawing pass. 420 */ 421 void resumeAfterLayer(); 422 423 /** 424 * This method is called whenever a stencil buffer is required. Subclasses 425 * should override this method and call attachStencilBufferToLayer() on the 426 * appropriate layer(s). 427 */ 428 virtual void ensureStencilBuffer(); 429 430 /** 431 * Obtains a stencil render buffer (allocating it if necessary) and 432 * attaches it to the specified layer. 433 */ 434 void attachStencilBufferToLayer(Layer* layer); 435 436 /** 437 * Draw a rectangle list. Currently only used for the the stencil buffer so that the stencil 438 * will have a value of 'n' in every unclipped pixel, where 'n' is the number of rectangles 439 * in the list. 440 */ 441 void drawRectangleList(const RectangleList& rectangleList); 442 443 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 444 const SkPaint* paint = nullptr); 445 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 446 return quickRejectSetupScissor(bounds.left, bounds.top, 447 bounds.right, bounds.bottom, paint); 448 } 449 450 /** 451 * Compose the layer defined in the current snapshot with the layer 452 * defined by the previous snapshot. 453 * 454 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 455 * 456 * @param curent The current snapshot containing the layer to compose 457 * @param previous The previous snapshot to compose the current layer with 458 */ 459 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 460 461 /** 462 * Marks the specified region as dirty at the specified bounds. 463 */ 464 void dirtyLayerUnchecked(Rect& bounds, Region* region); 465 466 /** 467 * Returns the region of the current layer. 468 */ 469 virtual Region* getRegion() const { 470 return mState.currentRegion(); 471 } 472 473 /** 474 * Indicates whether rendering is currently targeted at a layer. 475 */ 476 virtual bool hasLayer() const { 477 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 478 } 479 480 481 /** 482 * Renders the specified layer as a textured quad. 483 * 484 * @param layer The layer to render 485 * @param rect The bounds of the layer 486 */ 487 void drawTextureLayer(Layer* layer, const Rect& rect); 488 489 /** 490 * Gets the alpha and xfermode out of a paint object. If the paint is null 491 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 492 * snapshot alpha, and overrideLayerAlpha 493 * 494 * @param paint The paint to extract values from 495 * @param alpha Where to store the resulting alpha 496 * @param mode Where to store the resulting xfermode 497 */ 498 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 499 500 /** 501 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 502 * 503 * @param layer The layer from which the alpha is extracted 504 */ 505 inline float getLayerAlpha(const Layer* layer) const; 506 507 /** 508 * Safely retrieves the ColorFilter from the given Paint. If the paint is 509 * null then null is returned. 510 */ 511 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 512 return paint ? paint->getColorFilter() : nullptr; 513 } 514 515 /** 516 * Safely retrieves the Shader from the given Paint. If the paint is 517 * null then null is returned. 518 */ 519 static inline const SkShader* getShader(const SkPaint* paint) { 520 return paint ? paint->getShader() : nullptr; 521 } 522 523 /** 524 * Set to true to suppress error checks at the end of a frame. 525 */ 526 virtual bool suppressErrorChecks() const { 527 return false; 528 } 529 530 CanvasState mState; 531 Caches& mCaches; 532 Extensions& mExtensions; // TODO: move to RenderState 533 RenderState& mRenderState; 534 535private: 536 /** 537 * Discards the content of the framebuffer if supported by the driver. 538 * This method should be called at the beginning of a frame to optimize 539 * rendering on some tiler architectures. 540 */ 541 void discardFramebuffer(float left, float top, float right, float bottom); 542 543 /** 544 * Ensures the state of the renderer is the same as the state of 545 * the GL context. 546 */ 547 void syncState(); 548 549 /** 550 * Tells the GPU what part of the screen is about to be redrawn. 551 * This method will use the current layer space clip rect. 552 * This method needs to be invoked every time getTargetFbo() is 553 * bound again. 554 */ 555 void startTilingCurrentClip(bool opaque = false, bool expand = false); 556 557 /** 558 * Tells the GPU what part of the screen is about to be redrawn. 559 * This method needs to be invoked every time getTargetFbo() is 560 * bound again. 561 */ 562 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 563 564 /** 565 * Tells the GPU that we are done drawing the frame or that we 566 * are switching to another render target. 567 */ 568 void endTiling(); 569 570 /** 571 * Sets the clipping rectangle using glScissor. The clip is defined by 572 * the current snapshot's clipRect member. 573 */ 574 void setScissorFromClip(); 575 576 /** 577 * Sets the clipping region using the stencil buffer. The clip region 578 * is defined by the current snapshot's clipRegion member. 579 */ 580 void setStencilFromClip(); 581 582 /** 583 * Given the local bounds of the layer, calculates ... 584 */ 585 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 586 587 /** 588 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 589 */ 590 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 591 bool fboLayer, int alpha); 592 593 /** 594 * Creates a new layer stored in the specified snapshot. 595 * 596 * @param snapshot The snapshot associated with the new layer 597 * @param left The left coordinate of the layer 598 * @param top The top coordinate of the layer 599 * @param right The right coordinate of the layer 600 * @param bottom The bottom coordinate of the layer 601 * @param alpha The translucency of the layer 602 * @param mode The blending mode of the layer 603 * @param flags The layer save flags 604 * @param mask A mask to use when drawing the layer back, may be empty 605 * 606 * @return True if the layer was successfully created, false otherwise 607 */ 608 bool createLayer(float left, float top, float right, float bottom, 609 const SkPaint* paint, int flags, const SkPath* convexMask); 610 611 /** 612 * Creates a new layer stored in the specified snapshot as an FBO. 613 * 614 * @param layer The layer to store as an FBO 615 * @param snapshot The snapshot associated with the new layer 616 * @param bounds The bounds of the layer 617 */ 618 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 619 620 /** 621 * Compose the specified layer as a region. 622 * 623 * @param layer The layer to compose 624 * @param rect The layer's bounds 625 */ 626 void composeLayerRegion(Layer* layer, const Rect& rect); 627 628 /** 629 * Compose the specified layer as a simple rectangle. 630 * 631 * @param layer The layer to compose 632 * @param rect The layer's bounds 633 * @param swap If true, the source and destination are swapped 634 */ 635 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 636 637 /** 638 * Clears all the regions corresponding to the current list of layers. 639 * This method MUST be invoked before any drawing operation. 640 */ 641 void clearLayerRegions(); 642 643 /** 644 * Mark the layer as dirty at the specified coordinates. The coordinates 645 * are transformed with the supplied matrix. 646 */ 647 void dirtyLayer(const float left, const float top, 648 const float right, const float bottom, const mat4 transform); 649 650 /** 651 * Mark the layer as dirty at the specified coordinates. 652 */ 653 void dirtyLayer(const float left, const float top, 654 const float right, const float bottom); 655 656 /** 657 * Draws a colored rectangle with the specified color. The specified coordinates 658 * are transformed by the current snapshot's transform matrix unless specified 659 * otherwise. 660 * 661 * @param left The left coordinate of the rectangle 662 * @param top The top coordinate of the rectangle 663 * @param right The right coordinate of the rectangle 664 * @param bottom The bottom coordinate of the rectangle 665 * @param paint The paint containing the color, blending mode, etc. 666 * @param ignoreTransform True if the current transform should be ignored 667 */ 668 void drawColorRect(float left, float top, float right, float bottom, 669 const SkPaint* paint, bool ignoreTransform = false); 670 671 /** 672 * Draws a series of colored rectangles with the specified color. The specified 673 * coordinates are transformed by the current snapshot's transform matrix unless 674 * specified otherwise. 675 * 676 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 677 * per rectangle 678 * @param paint The paint containing the color, blending mode, etc. 679 * @param ignoreTransform True if the current transform should be ignored 680 * @param dirty True if calling this method should dirty the current layer 681 * @param clip True if the rects should be clipped, false otherwise 682 */ 683 void drawColorRects(const float* rects, int count, const SkPaint* paint, 684 bool ignoreTransform = false, bool dirty = true, bool clip = true); 685 686 /** 687 * Draws the shape represented by the specified path texture. 688 * This method invokes drawPathTexture() but takes into account 689 * the extra left/top offset and the texture offset to correctly 690 * position the final shape. 691 * 692 * @param left The left coordinate of the shape to render 693 * @param top The top coordinate of the shape to render 694 * @param texture The texture reprsenting the shape 695 * @param paint The paint to draw the shape with 696 */ 697 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 698 699 /** 700 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 701 * different compositing rules. 702 * 703 * @param texture The texture to draw with 704 * @param left The x coordinate of the bitmap 705 * @param top The y coordinate of the bitmap 706 * @param paint The paint to render with 707 */ 708 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 709 710 /** 711 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 712 * 713 * @param vertexBuffer The VertexBuffer to be drawn 714 * @param paint The paint to render with 715 * @param flags flags with which to draw 716 */ 717 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 718 const SkPaint* paint, int flags = 0); 719 720 /** 721 * Convenience for translating method 722 */ 723 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 724 const SkPaint* paint, int flags = 0) { 725 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 726 } 727 728 /** 729 * Renders the convex hull defined by the specified path as a strip of polygons. 730 * 731 * @param path The hull of the path to draw 732 * @param paint The paint to render with 733 */ 734 void drawConvexPath(const SkPath& path, const SkPaint* paint); 735 736 /** 737 * Draws a textured rectangle with the specified texture. The specified coordinates 738 * are transformed by the current snapshot's transform matrix. 739 * 740 * @param left The left coordinate of the rectangle 741 * @param top The top coordinate of the rectangle 742 * @param right The right coordinate of the rectangle 743 * @param bottom The bottom coordinate of the rectangle 744 * @param texture The texture to use 745 * @param paint The paint containing the alpha, blending mode, etc. 746 */ 747 void drawTextureRect(float left, float top, float right, float bottom, 748 Texture* texture, const SkPaint* paint); 749 750 /** 751 * Draws a textured mesh with the specified texture. If the indices are omitted, 752 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 753 * VBO is bound. 754 * 755 * @param left The left coordinate of the rectangle 756 * @param top The top coordinate of the rectangle 757 * @param right The right coordinate of the rectangle 758 * @param bottom The bottom coordinate of the rectangle 759 * @param texture The texture name to map onto the rectangle 760 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 761 * @param blend True if the texture contains an alpha channel 762 * @param vertices The vertices that define the mesh 763 * @param texCoords The texture coordinates of each vertex 764 * @param elementsCount The number of elements in the mesh, required by indices 765 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 766 * @param ignoreTransform True if the current transform should be ignored 767 * @param vbo The VBO used to draw the mesh 768 * @param modelViewMode Defines whether the model view matrix should be scaled 769 * @param dirty True if calling this method should dirty the current layer 770 */ 771 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 772 const SkPaint* paint, bool blend, 773 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 774 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 775 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 776 777 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 778 const SkPaint* paint, bool blend, 779 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 780 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 781 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 782 783 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 784 GLuint texture, const SkPaint* paint, 785 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 786 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 787 bool dirty = true); 788 789 /** 790 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 791 * If the number of vertices to draw exceeds the number of indices we have 792 * pre-allocated, this method will generate several glDrawElements() calls. 793 */ 794 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 795 796 /** 797 * Draws text underline and strike-through if needed. 798 * 799 * @param text The text to decor 800 * @param bytesCount The number of bytes in the text 801 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 802 * @param x The x coordinate where the text will be drawn 803 * @param y The y coordinate where the text will be drawn 804 * @param paint The paint to draw the text with 805 */ 806 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 807 808 /** 809 * Draws shadow layer on text (with optional positions). 810 * 811 * @param paint The paint to draw the shadow with 812 * @param text The text to draw 813 * @param bytesCount The number of bytes in the text 814 * @param count The number of glyphs in the text 815 * @param positions The x, y positions of individual glyphs (or NULL) 816 * @param fontRenderer The font renderer object 817 * @param alpha The alpha value for drawing the shadow 818 * @param x The x coordinate where the shadow will be drawn 819 * @param y The y coordinate where the shadow will be drawn 820 */ 821 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 822 const float* positions, FontRenderer& fontRenderer, int alpha, 823 float x, float y); 824 825 /** 826 * Draws a path texture. Path textures are alpha8 bitmaps that need special 827 * compositing to apply colors/filters/etc. 828 * 829 * @param texture The texture to render 830 * @param x The x coordinate where the texture will be drawn 831 * @param y The y coordinate where the texture will be drawn 832 * @param paint The paint to draw the texture with 833 */ 834 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 835 836 /** 837 * Resets the texture coordinates stored in mMeshVertices. Setting the values 838 * back to default is achieved by calling: 839 * 840 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 841 * 842 * @param u1 The left coordinate of the texture 843 * @param v1 The bottom coordinate of the texture 844 * @param u2 The right coordinate of the texture 845 * @param v2 The top coordinate of the texture 846 */ 847 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 848 849 /** 850 * Returns true if the specified paint will draw invisible text. 851 */ 852 bool canSkipText(const SkPaint* paint) const; 853 854 /** 855 * Binds the specified texture. The texture unit must have been selected 856 * prior to calling this method. 857 */ 858 inline void bindTexture(GLuint texture) { 859 mCaches.bindTexture(texture); 860 } 861 862 /** 863 * Binds the specified EGLImage texture. The texture unit must have been selected 864 * prior to calling this method. 865 */ 866 inline void bindExternalTexture(GLuint texture) { 867 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 868 } 869 870 /** 871 * Enable or disable blending as necessary. This function sets the appropriate 872 * blend function based on the specified xfermode. 873 */ 874 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 875 bool swapSrcDst = false); 876 877 /** 878 * Use the specified program with the current GL context. If the program is already 879 * in use, it will not be bound again. If it is not in use, the current program is 880 * marked unused and the specified program becomes used and becomes the new 881 * current program. 882 * 883 * @param program The program to use 884 * 885 * @return true If the specified program was already in use, false otherwise. 886 */ 887 inline bool useProgram(Program* program); 888 889 /** 890 * Invoked before any drawing operation. This sets required state. 891 */ 892 void setupDraw(bool clear = true); 893 894 /** 895 * Various methods to setup OpenGL rendering. 896 */ 897 void setupDrawWithTexture(bool isAlpha8 = false); 898 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 899 void setupDrawWithExternalTexture(); 900 void setupDrawNoTexture(); 901 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 902 void setupDrawColor(int color, int alpha); 903 void setupDrawColor(float r, float g, float b, float a); 904 void setupDrawAlpha8Color(int color, int alpha); 905 void setupDrawTextGamma(const SkPaint* paint); 906 void setupDrawShader(const SkShader* shader); 907 void setupDrawColorFilter(const SkColorFilter* filter); 908 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 909 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 910 void setupDrawProgram(); 911 void setupDrawDirtyRegionsDisabled(); 912 913 /** 914 * Setup the current program matrices based upon the nature of the geometry. 915 * 916 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 917 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 918 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 919 * transformations are stored in the modelView matrix and uploaded to the shader. 920 * 921 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 922 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 923 * 924 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 925 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 926 * or when simple translation has been extracted) 927 */ 928 void setupDrawModelView(ModelViewMode mode, bool offset, 929 float left, float top, float right, float bottom, bool ignoreTransform = false); 930 void setupDrawColorUniforms(bool hasShader); 931 void setupDrawPureColorUniforms(); 932 933 /** 934 * Setup uniforms for the current shader. 935 * 936 * @param shader SkShader on the current paint. 937 * 938 * @param ignoreTransform Set to true to ignore the transform in shader. 939 */ 940 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 941 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 942 void setupDrawSimpleMesh(); 943 void setupDrawTexture(GLuint texture); 944 void setupDrawExternalTexture(GLuint texture); 945 void setupDrawTextureTransform(); 946 void setupDrawTextureTransformUniforms(mat4& transform); 947 void setupDrawTextGammaUniforms(); 948 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 949 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 950 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 951 void setupDrawIndexedVertices(GLvoid* vertices); 952 void accountForClear(SkXfermode::Mode mode); 953 954 bool updateLayer(Layer* layer, bool inFrame); 955 void updateLayers(); 956 void flushLayers(); 957 958#if DEBUG_LAYERS_AS_REGIONS 959 /** 960 * Renders the specified region as a series of rectangles. This method 961 * is used for debugging only. 962 */ 963 void drawRegionRectsDebug(const Region& region); 964#endif 965 966 /** 967 * Renders the specified region as a series of rectangles. The region 968 * must be in screen-space coordinates. 969 */ 970 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 971 972 /** 973 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 974 * is turned on. 975 */ 976 void debugClip(); 977 978 void debugOverdraw(bool enable, bool clear); 979 void renderOverdraw(); 980 void countOverdraw(); 981 982 /** 983 * Should be invoked every time the glScissor is modified. 984 */ 985 inline void dirtyClip() { mState.setDirtyClip(true); } 986 987 inline const UvMapper& getMapper(const Texture* texture) { 988 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 989 } 990 991 /** 992 * Returns a texture object for the specified bitmap. The texture can 993 * come from the texture cache or an atlas. If this method returns 994 * NULL, the texture could not be found and/or allocated. 995 */ 996 Texture* getTexture(const SkBitmap* bitmap); 997 998 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 999 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 1000 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 1001 1002 /** 1003 * Model-view matrix used to position/size objects 1004 * 1005 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 1006 * currentTransform(). 1007 * 1008 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 1009 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 1010 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 1011 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 1012 * of a bitmap. 1013 * 1014 * Used as input to SkiaShader transformation. 1015 */ 1016 mat4 mModelViewMatrix; 1017 1018 // State used to define the clipping region 1019 Rect mTilingClip; 1020 // Is the target render surface opaque 1021 bool mOpaque; 1022 // Is a frame currently being rendered 1023 bool mFrameStarted; 1024 1025 // Used to draw textured quads 1026 TextureVertex mMeshVertices[4]; 1027 1028 // Default UV mapper 1029 const UvMapper mUvMapper; 1030 1031 // shader, filters, and shadow 1032 DrawModifiers mDrawModifiers; 1033 SkPaint mFilteredPaint; 1034 1035 // List of rectangles to clear after saveLayer() is invoked 1036 std::vector<Rect> mLayers; 1037 // List of layers to update at the beginning of a frame 1038 Vector< sp<Layer> > mLayerUpdates; 1039 1040 // The following fields are used to setup drawing 1041 // Used to describe the shaders to generate 1042 ProgramDescription mDescription; 1043 // Color description 1044 bool mColorSet; 1045 float mColorA, mColorR, mColorG, mColorB; 1046 // Indicates that the shader should get a color 1047 bool mSetShaderColor; 1048 // Current texture unit 1049 GLuint mTextureUnit; 1050 // Track dirty regions, true by default 1051 bool mTrackDirtyRegions; 1052 // Indicate whether we are drawing an opaque frame 1053 bool mOpaqueFrame; 1054 1055 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1056 // Properties.h 1057 bool mScissorOptimizationDisabled; 1058 1059 // No-ops start/endTiling when set 1060 bool mSuppressTiling; 1061 bool mFirstFrameAfterResize; 1062 1063 bool mSkipOutlineClip; 1064 1065 // True if anything has been drawn since the last call to 1066 // reportAndClearDirty() 1067 bool mDirty; 1068 1069 // Lighting + shadows 1070 Vector3 mLightCenter; 1071 float mLightRadius; 1072 uint8_t mAmbientShadowAlpha; 1073 uint8_t mSpotShadowAlpha; 1074 1075 // Paths kept alive for the duration of the frame 1076 std::vector<std::unique_ptr<SkPath>> mTempPaths; 1077 1078 friend class Layer; 1079 friend class TextSetupFunctor; 1080 friend class DrawBitmapOp; 1081 friend class DrawPatchOp; 1082 1083}; // class OpenGLRenderer 1084 1085}; // namespace uirenderer 1086}; // namespace android 1087 1088#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1089