OpenGLRenderer.h revision 44eb2c00861098dd3e2950d923646814b4cc57c2
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 * Tells the GPU what part of the screen is about to be redrawn. 545 * This method will use the current layer space clip rect. 546 * This method needs to be invoked every time getTargetFbo() is 547 * bound again. 548 */ 549 void startTilingCurrentClip(bool opaque = false, bool expand = false); 550 551 /** 552 * Tells the GPU what part of the screen is about to be redrawn. 553 * This method needs to be invoked every time getTargetFbo() is 554 * bound again. 555 */ 556 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 557 558 /** 559 * Tells the GPU that we are done drawing the frame or that we 560 * are switching to another render target. 561 */ 562 void endTiling(); 563 564 /** 565 * Sets the clipping rectangle using glScissor. The clip is defined by 566 * the current snapshot's clipRect member. 567 */ 568 void setScissorFromClip(); 569 570 /** 571 * Sets the clipping region using the stencil buffer. The clip region 572 * is defined by the current snapshot's clipRegion member. 573 */ 574 void setStencilFromClip(); 575 576 /** 577 * Given the local bounds of the layer, calculates ... 578 */ 579 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 580 581 /** 582 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 583 */ 584 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 585 bool fboLayer, int alpha); 586 587 /** 588 * Creates a new layer stored in the specified snapshot. 589 * 590 * @param snapshot The snapshot associated with the new layer 591 * @param left The left coordinate of the layer 592 * @param top The top coordinate of the layer 593 * @param right The right coordinate of the layer 594 * @param bottom The bottom coordinate of the layer 595 * @param alpha The translucency of the layer 596 * @param mode The blending mode of the layer 597 * @param flags The layer save flags 598 * @param mask A mask to use when drawing the layer back, may be empty 599 * 600 * @return True if the layer was successfully created, false otherwise 601 */ 602 bool createLayer(float left, float top, float right, float bottom, 603 const SkPaint* paint, int flags, const SkPath* convexMask); 604 605 /** 606 * Creates a new layer stored in the specified snapshot as an FBO. 607 * 608 * @param layer The layer to store as an FBO 609 * @param snapshot The snapshot associated with the new layer 610 * @param bounds The bounds of the layer 611 */ 612 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 613 614 /** 615 * Compose the specified layer as a region. 616 * 617 * @param layer The layer to compose 618 * @param rect The layer's bounds 619 */ 620 void composeLayerRegion(Layer* layer, const Rect& rect); 621 622 /** 623 * Compose the specified layer as a simple rectangle. 624 * 625 * @param layer The layer to compose 626 * @param rect The layer's bounds 627 * @param swap If true, the source and destination are swapped 628 */ 629 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 630 631 /** 632 * Clears all the regions corresponding to the current list of layers. 633 * This method MUST be invoked before any drawing operation. 634 */ 635 void clearLayerRegions(); 636 637 /** 638 * Mark the layer as dirty at the specified coordinates. The coordinates 639 * are transformed with the supplied matrix. 640 */ 641 void dirtyLayer(const float left, const float top, 642 const float right, const float bottom, const mat4 transform); 643 644 /** 645 * Mark the layer as dirty at the specified coordinates. 646 */ 647 void dirtyLayer(const float left, const float top, 648 const float right, const float bottom); 649 650 /** 651 * Draws a colored rectangle with the specified color. The specified coordinates 652 * are transformed by the current snapshot's transform matrix unless specified 653 * otherwise. 654 * 655 * @param left The left coordinate of the rectangle 656 * @param top The top coordinate of the rectangle 657 * @param right The right coordinate of the rectangle 658 * @param bottom The bottom coordinate of the rectangle 659 * @param paint The paint containing the color, blending mode, etc. 660 * @param ignoreTransform True if the current transform should be ignored 661 */ 662 void drawColorRect(float left, float top, float right, float bottom, 663 const SkPaint* paint, bool ignoreTransform = false); 664 665 /** 666 * Draws a series of colored rectangles with the specified color. The specified 667 * coordinates are transformed by the current snapshot's transform matrix unless 668 * specified otherwise. 669 * 670 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 671 * per rectangle 672 * @param paint The paint containing the color, blending mode, etc. 673 * @param ignoreTransform True if the current transform should be ignored 674 * @param dirty True if calling this method should dirty the current layer 675 * @param clip True if the rects should be clipped, false otherwise 676 */ 677 void drawColorRects(const float* rects, int count, const SkPaint* paint, 678 bool ignoreTransform = false, bool dirty = true, bool clip = true); 679 680 /** 681 * Draws the shape represented by the specified path texture. 682 * This method invokes drawPathTexture() but takes into account 683 * the extra left/top offset and the texture offset to correctly 684 * position the final shape. 685 * 686 * @param left The left coordinate of the shape to render 687 * @param top The top coordinate of the shape to render 688 * @param texture The texture reprsenting the shape 689 * @param paint The paint to draw the shape with 690 */ 691 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 692 693 /** 694 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 695 * different compositing rules. 696 * 697 * @param texture The texture to draw with 698 * @param left The x coordinate of the bitmap 699 * @param top The y coordinate of the bitmap 700 * @param paint The paint to render with 701 */ 702 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 703 704 /** 705 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 706 * 707 * @param vertexBuffer The VertexBuffer to be drawn 708 * @param paint The paint to render with 709 * @param flags flags with which to draw 710 */ 711 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 712 const SkPaint* paint, int flags = 0); 713 714 /** 715 * Convenience for translating method 716 */ 717 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 718 const SkPaint* paint, int flags = 0) { 719 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 720 } 721 722 /** 723 * Renders the convex hull defined by the specified path as a strip of polygons. 724 * 725 * @param path The hull of the path to draw 726 * @param paint The paint to render with 727 */ 728 void drawConvexPath(const SkPath& path, const SkPaint* paint); 729 730 /** 731 * Draws a textured rectangle with the specified texture. The specified coordinates 732 * are transformed by the current snapshot's transform matrix. 733 * 734 * @param left The left coordinate of the rectangle 735 * @param top The top coordinate of the rectangle 736 * @param right The right coordinate of the rectangle 737 * @param bottom The bottom coordinate of the rectangle 738 * @param texture The texture to use 739 * @param paint The paint containing the alpha, blending mode, etc. 740 */ 741 void drawTextureRect(float left, float top, float right, float bottom, 742 Texture* texture, const SkPaint* paint); 743 744 /** 745 * Draws a textured mesh with the specified texture. If the indices are omitted, 746 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 747 * VBO is bound. 748 * 749 * @param left The left coordinate of the rectangle 750 * @param top The top coordinate of the rectangle 751 * @param right The right coordinate of the rectangle 752 * @param bottom The bottom coordinate of the rectangle 753 * @param texture The texture name to map onto the rectangle 754 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 755 * @param blend True if the texture contains an alpha channel 756 * @param vertices The vertices that define the mesh 757 * @param texCoords The texture coordinates of each vertex 758 * @param elementsCount The number of elements in the mesh, required by indices 759 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 760 * @param ignoreTransform True if the current transform should be ignored 761 * @param vbo The VBO used to draw the mesh 762 * @param modelViewMode Defines whether the model view matrix should be scaled 763 * @param dirty True if calling this method should dirty the current layer 764 */ 765 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 766 const SkPaint* paint, bool blend, 767 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 768 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 769 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 770 771 void drawIndexedTextureMesh(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 drawAlpha8TextureMesh(float left, float top, float right, float bottom, 778 GLuint texture, const SkPaint* paint, 779 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 780 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 781 bool dirty = true); 782 783 /** 784 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 785 * If the number of vertices to draw exceeds the number of indices we have 786 * pre-allocated, this method will generate several glDrawElements() calls. 787 */ 788 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 789 790 /** 791 * Draws text underline and strike-through if needed. 792 * 793 * @param text The text to decor 794 * @param bytesCount The number of bytes in the text 795 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 796 * @param x The x coordinate where the text will be drawn 797 * @param y The y coordinate where the text will be drawn 798 * @param paint The paint to draw the text with 799 */ 800 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 801 802 /** 803 * Draws shadow layer on text (with optional positions). 804 * 805 * @param paint The paint to draw the shadow with 806 * @param text The text to draw 807 * @param bytesCount The number of bytes in the text 808 * @param count The number of glyphs in the text 809 * @param positions The x, y positions of individual glyphs (or NULL) 810 * @param fontRenderer The font renderer object 811 * @param alpha The alpha value for drawing the shadow 812 * @param x The x coordinate where the shadow will be drawn 813 * @param y The y coordinate where the shadow will be drawn 814 */ 815 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 816 const float* positions, FontRenderer& fontRenderer, int alpha, 817 float x, float y); 818 819 /** 820 * Draws a path texture. Path textures are alpha8 bitmaps that need special 821 * compositing to apply colors/filters/etc. 822 * 823 * @param texture The texture to render 824 * @param x The x coordinate where the texture will be drawn 825 * @param y The y coordinate where the texture will be drawn 826 * @param paint The paint to draw the texture with 827 */ 828 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 829 830 /** 831 * Resets the texture coordinates stored in mMeshVertices. Setting the values 832 * back to default is achieved by calling: 833 * 834 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 835 * 836 * @param u1 The left coordinate of the texture 837 * @param v1 The bottom coordinate of the texture 838 * @param u2 The right coordinate of the texture 839 * @param v2 The top coordinate of the texture 840 */ 841 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 842 843 /** 844 * Returns true if the specified paint will draw invisible text. 845 */ 846 bool canSkipText(const SkPaint* paint) const; 847 848 /** 849 * Enable or disable blending as necessary. This function sets the appropriate 850 * blend function based on the specified xfermode. 851 */ 852 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 853 bool swapSrcDst = false); 854 855 /** 856 * Use the specified program with the current GL context. If the program is already 857 * in use, it will not be bound again. If it is not in use, the current program is 858 * marked unused and the specified program becomes used and becomes the new 859 * current program. 860 * 861 * @param program The program to use 862 * 863 * @return true If the specified program was already in use, false otherwise. 864 */ 865 inline bool useProgram(Program* program); 866 867 /** 868 * Invoked before any drawing operation. This sets required state. 869 */ 870 void setupDraw(bool clear = true); 871 872 /** 873 * Various methods to setup OpenGL rendering. 874 */ 875 void setupDrawWithTexture(bool isAlpha8 = false); 876 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 877 void setupDrawWithExternalTexture(); 878 void setupDrawNoTexture(); 879 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 880 void setupDrawColor(int color, int alpha); 881 void setupDrawColor(float r, float g, float b, float a); 882 void setupDrawAlpha8Color(int color, int alpha); 883 void setupDrawTextGamma(const SkPaint* paint); 884 void setupDrawShader(const SkShader* shader); 885 void setupDrawColorFilter(const SkColorFilter* filter); 886 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 887 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 888 void setupDrawProgram(); 889 void setupDrawDirtyRegionsDisabled(); 890 891 /** 892 * Setup the current program matrices based upon the nature of the geometry. 893 * 894 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 895 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 896 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 897 * transformations are stored in the modelView matrix and uploaded to the shader. 898 * 899 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 900 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 901 * 902 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 903 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 904 * or when simple translation has been extracted) 905 */ 906 void setupDrawModelView(ModelViewMode mode, bool offset, 907 float left, float top, float right, float bottom, bool ignoreTransform = false); 908 void setupDrawColorUniforms(bool hasShader); 909 void setupDrawPureColorUniforms(); 910 911 /** 912 * Setup uniforms for the current shader. 913 * 914 * @param shader SkShader on the current paint. 915 * 916 * @param ignoreTransform Set to true to ignore the transform in shader. 917 */ 918 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 919 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 920 void setupDrawSimpleMesh(); 921 void setupDrawTexture(GLuint texture); 922 void setupDrawExternalTexture(GLuint texture); 923 void setupDrawTextureTransform(); 924 void setupDrawTextureTransformUniforms(mat4& transform); 925 void setupDrawTextGammaUniforms(); 926 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 927 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 928 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 929 void setupDrawIndexedVertices(GLvoid* vertices); 930 void accountForClear(SkXfermode::Mode mode); 931 932 bool updateLayer(Layer* layer, bool inFrame); 933 void updateLayers(); 934 void flushLayers(); 935 936#if DEBUG_LAYERS_AS_REGIONS 937 /** 938 * Renders the specified region as a series of rectangles. This method 939 * is used for debugging only. 940 */ 941 void drawRegionRectsDebug(const Region& region); 942#endif 943 944 /** 945 * Renders the specified region as a series of rectangles. The region 946 * must be in screen-space coordinates. 947 */ 948 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 949 950 /** 951 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 952 * is turned on. 953 */ 954 void debugClip(); 955 956 void debugOverdraw(bool enable, bool clear); 957 void renderOverdraw(); 958 void countOverdraw(); 959 960 /** 961 * Should be invoked every time the glScissor is modified. 962 */ 963 inline void dirtyClip() { mState.setDirtyClip(true); } 964 965 inline const UvMapper& getMapper(const Texture* texture) { 966 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 967 } 968 969 /** 970 * Returns a texture object for the specified bitmap. The texture can 971 * come from the texture cache or an atlas. If this method returns 972 * NULL, the texture could not be found and/or allocated. 973 */ 974 Texture* getTexture(const SkBitmap* bitmap); 975 976 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 977 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 978 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 979 980 /** 981 * Model-view matrix used to position/size objects 982 * 983 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 984 * currentTransform(). 985 * 986 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 987 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 988 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 989 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 990 * of a bitmap. 991 * 992 * Used as input to SkiaShader transformation. 993 */ 994 mat4 mModelViewMatrix; 995 996 // State used to define the clipping region 997 Rect mTilingClip; 998 // Is the target render surface opaque 999 bool mOpaque; 1000 // Is a frame currently being rendered 1001 bool mFrameStarted; 1002 1003 // Used to draw textured quads 1004 TextureVertex mMeshVertices[4]; 1005 1006 // Default UV mapper 1007 const UvMapper mUvMapper; 1008 1009 // shader, filters, and shadow 1010 DrawModifiers mDrawModifiers; 1011 SkPaint mFilteredPaint; 1012 1013 // List of rectangles to clear after saveLayer() is invoked 1014 std::vector<Rect> mLayers; 1015 // List of layers to update at the beginning of a frame 1016 Vector< sp<Layer> > mLayerUpdates; 1017 1018 // The following fields are used to setup drawing 1019 // Used to describe the shaders to generate 1020 ProgramDescription mDescription; 1021 // Color description 1022 bool mColorSet; 1023 float mColorA, mColorR, mColorG, mColorB; 1024 // Indicates that the shader should get a color 1025 bool mSetShaderColor; 1026 // Current texture unit 1027 GLuint mTextureUnit; 1028 // Track dirty regions, true by default 1029 bool mTrackDirtyRegions; 1030 // Indicate whether we are drawing an opaque frame 1031 bool mOpaqueFrame; 1032 1033 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1034 // Properties.h 1035 bool mScissorOptimizationDisabled; 1036 1037 // No-ops start/endTiling when set 1038 bool mSuppressTiling; 1039 bool mFirstFrameAfterResize; 1040 1041 bool mSkipOutlineClip; 1042 1043 // True if anything has been drawn since the last call to 1044 // reportAndClearDirty() 1045 bool mDirty; 1046 1047 // Lighting + shadows 1048 Vector3 mLightCenter; 1049 float mLightRadius; 1050 uint8_t mAmbientShadowAlpha; 1051 uint8_t mSpotShadowAlpha; 1052 1053 // Paths kept alive for the duration of the frame 1054 std::vector<std::unique_ptr<SkPath>> mTempPaths; 1055 1056 friend class Layer; 1057 friend class TextSetupFunctor; 1058 friend class DrawBitmapOp; 1059 friend class DrawPatchOp; 1060 1061}; // class OpenGLRenderer 1062 1063}; // namespace uirenderer 1064}; // namespace android 1065 1066#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1067