OpenGLRenderer.h revision e84a208317e0ed388fcdad1e6743c7849acb51b0
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 53class SkShader; 54 55namespace android { 56namespace uirenderer { 57 58class DeferredDisplayState; 59class RenderState; 60class RenderNode; 61class TextSetupFunctor; 62class VertexBuffer; 63 64struct DrawModifiers { 65 DrawModifiers() { 66 reset(); 67 } 68 69 void reset() { 70 memset(this, 0, sizeof(DrawModifiers)); 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 drawBitmapData(const SkBitmap* bitmap, 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 // simple rect clip 227 bool isCurrentClipSimple() { return mState.isCurrentClipSimple(); } 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 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 SkPath* path = new SkPath(); 395 mTempPaths.push_back(path); 396 return path; 397 } 398 399protected: 400 /** 401 * Perform the setup specific to a frame. This method does not 402 * issue any OpenGL commands. 403 */ 404 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 405 406 /** 407 * Indicates the start of rendering. This method will setup the 408 * initial OpenGL state (viewport, clearing the buffer, etc.) 409 */ 410 void startFrame(); 411 412 /** 413 * Clears the underlying surface if needed. 414 */ 415 virtual void clear(float left, float top, float right, float bottom, bool opaque); 416 417 /** 418 * Call this method after updating a layer during a drawing pass. 419 */ 420 void resumeAfterLayer(); 421 422 /** 423 * This method is called whenever a stencil buffer is required. Subclasses 424 * should override this method and call attachStencilBufferToLayer() on the 425 * appropriate layer(s). 426 */ 427 virtual void ensureStencilBuffer(); 428 429 /** 430 * Obtains a stencil render buffer (allocating it if necessary) and 431 * attaches it to the specified layer. 432 */ 433 void attachStencilBufferToLayer(Layer* layer); 434 435 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 436 const SkPaint* paint = nullptr); 437 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 438 return quickRejectSetupScissor(bounds.left, bounds.top, 439 bounds.right, bounds.bottom, paint); 440 } 441 442 /** 443 * Compose the layer defined in the current snapshot with the layer 444 * defined by the previous snapshot. 445 * 446 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 447 * 448 * @param curent The current snapshot containing the layer to compose 449 * @param previous The previous snapshot to compose the current layer with 450 */ 451 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 452 453 /** 454 * Marks the specified region as dirty at the specified bounds. 455 */ 456 void dirtyLayerUnchecked(Rect& bounds, Region* region); 457 458 /** 459 * Returns the region of the current layer. 460 */ 461 virtual Region* getRegion() const { 462 return mState.currentRegion(); 463 } 464 465 /** 466 * Indicates whether rendering is currently targeted at a layer. 467 */ 468 virtual bool hasLayer() const { 469 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 470 } 471 472 473 /** 474 * Renders the specified layer as a textured quad. 475 * 476 * @param layer The layer to render 477 * @param rect The bounds of the layer 478 */ 479 void drawTextureLayer(Layer* layer, const Rect& rect); 480 481 /** 482 * Gets the alpha and xfermode out of a paint object. If the paint is null 483 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 484 * snapshot alpha, and overrideLayerAlpha 485 * 486 * @param paint The paint to extract values from 487 * @param alpha Where to store the resulting alpha 488 * @param mode Where to store the resulting xfermode 489 */ 490 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 491 492 /** 493 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 494 * 495 * @param layer The layer from which the alpha is extracted 496 */ 497 inline float getLayerAlpha(const Layer* layer) const; 498 499 /** 500 * Safely retrieves the ColorFilter from the given Paint. If the paint is 501 * null then null is returned. 502 */ 503 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 504 return paint ? paint->getColorFilter() : nullptr; 505 } 506 507 /** 508 * Safely retrieves the Shader from the given Paint. If the paint is 509 * null then null is returned. 510 */ 511 static inline const SkShader* getShader(const SkPaint* paint) { 512 return paint ? paint->getShader() : nullptr; 513 } 514 515 /** 516 * Set to true to suppress error checks at the end of a frame. 517 */ 518 virtual bool suppressErrorChecks() const { 519 return false; 520 } 521 522 inline RenderState& renderState() { return mRenderState; } 523 524 CanvasState mState; 525 526private: 527 /** 528 * Discards the content of the framebuffer if supported by the driver. 529 * This method should be called at the beginning of a frame to optimize 530 * rendering on some tiler architectures. 531 */ 532 void discardFramebuffer(float left, float top, float right, float bottom); 533 534 /** 535 * Ensures the state of the renderer is the same as the state of 536 * the GL context. 537 */ 538 void syncState(); 539 540 /** 541 * Tells the GPU what part of the screen is about to be redrawn. 542 * This method will use the current layer space clip rect. 543 * This method needs to be invoked every time getTargetFbo() is 544 * bound again. 545 */ 546 void startTilingCurrentClip(bool opaque = false, bool expand = false); 547 548 /** 549 * Tells the GPU what part of the screen is about to be redrawn. 550 * This method needs to be invoked every time getTargetFbo() is 551 * bound again. 552 */ 553 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 554 555 /** 556 * Tells the GPU that we are done drawing the frame or that we 557 * are switching to another render target. 558 */ 559 void endTiling(); 560 561 /** 562 * Sets the clipping rectangle using glScissor. The clip is defined by 563 * the current snapshot's clipRect member. 564 */ 565 void setScissorFromClip(); 566 567 /** 568 * Sets the clipping region using the stencil buffer. The clip region 569 * is defined by the current snapshot's clipRegion member. 570 */ 571 void setStencilFromClip(); 572 573 /** 574 * Given the local bounds of the layer, calculates ... 575 */ 576 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 577 578 /** 579 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 580 */ 581 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 582 bool fboLayer, int alpha); 583 584 /** 585 * Creates a new layer stored in the specified snapshot. 586 * 587 * @param snapshot The snapshot associated with the new layer 588 * @param left The left coordinate of the layer 589 * @param top The top coordinate of the layer 590 * @param right The right coordinate of the layer 591 * @param bottom The bottom coordinate of the layer 592 * @param alpha The translucency of the layer 593 * @param mode The blending mode of the layer 594 * @param flags The layer save flags 595 * @param mask A mask to use when drawing the layer back, may be empty 596 * 597 * @return True if the layer was successfully created, false otherwise 598 */ 599 bool createLayer(float left, float top, float right, float bottom, 600 const SkPaint* paint, int flags, const SkPath* convexMask); 601 602 /** 603 * Creates a new layer stored in the specified snapshot as an FBO. 604 * 605 * @param layer The layer to store as an FBO 606 * @param snapshot The snapshot associated with the new layer 607 * @param bounds The bounds of the layer 608 */ 609 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 610 611 /** 612 * Compose the specified layer as a region. 613 * 614 * @param layer The layer to compose 615 * @param rect The layer's bounds 616 */ 617 void composeLayerRegion(Layer* layer, const Rect& rect); 618 619 /** 620 * Compose the specified layer as a simple rectangle. 621 * 622 * @param layer The layer to compose 623 * @param rect The layer's bounds 624 * @param swap If true, the source and destination are swapped 625 */ 626 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 627 628 /** 629 * Clears all the regions corresponding to the current list of layers. 630 * This method MUST be invoked before any drawing operation. 631 */ 632 void clearLayerRegions(); 633 634 /** 635 * Mark the layer as dirty at the specified coordinates. The coordinates 636 * are transformed with the supplied matrix. 637 */ 638 void dirtyLayer(const float left, const float top, 639 const float right, const float bottom, const mat4 transform); 640 641 /** 642 * Mark the layer as dirty at the specified coordinates. 643 */ 644 void dirtyLayer(const float left, const float top, 645 const float right, const float bottom); 646 647 /** 648 * Draws a colored rectangle with the specified color. The specified coordinates 649 * are transformed by the current snapshot's transform matrix unless specified 650 * otherwise. 651 * 652 * @param left The left coordinate of the rectangle 653 * @param top The top coordinate of the rectangle 654 * @param right The right coordinate of the rectangle 655 * @param bottom The bottom coordinate of the rectangle 656 * @param paint The paint containing the color, blending mode, etc. 657 * @param ignoreTransform True if the current transform should be ignored 658 */ 659 void drawColorRect(float left, float top, float right, float bottom, 660 const SkPaint* paint, bool ignoreTransform = false); 661 662 /** 663 * Draws a series of colored rectangles with the specified color. The specified 664 * coordinates are transformed by the current snapshot's transform matrix unless 665 * specified otherwise. 666 * 667 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 668 * per rectangle 669 * @param paint The paint containing the color, blending mode, etc. 670 * @param ignoreTransform True if the current transform should be ignored 671 * @param dirty True if calling this method should dirty the current layer 672 * @param clip True if the rects should be clipped, false otherwise 673 */ 674 void drawColorRects(const float* rects, int count, const SkPaint* paint, 675 bool ignoreTransform = false, bool dirty = true, bool clip = true); 676 677 /** 678 * Draws the shape represented by the specified path texture. 679 * This method invokes drawPathTexture() but takes into account 680 * the extra left/top offset and the texture offset to correctly 681 * position the final shape. 682 * 683 * @param left The left coordinate of the shape to render 684 * @param top The top coordinate of the shape to render 685 * @param texture The texture reprsenting the shape 686 * @param paint The paint to draw the shape with 687 */ 688 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 689 690 /** 691 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 692 * different compositing rules. 693 * 694 * @param texture The texture to draw with 695 * @param left The x coordinate of the bitmap 696 * @param top The y coordinate of the bitmap 697 * @param paint The paint to render with 698 */ 699 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 700 701 /** 702 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 703 * 704 * @param vertexBuffer The VertexBuffer to be drawn 705 * @param paint The paint to render with 706 * @param flags flags with which to draw 707 */ 708 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 709 const SkPaint* paint, int flags = 0); 710 711 /** 712 * Convenience for translating method 713 */ 714 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 715 const SkPaint* paint, int flags = 0) { 716 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 717 } 718 719 /** 720 * Renders the convex hull defined by the specified path as a strip of polygons. 721 * 722 * @param path The hull of the path to draw 723 * @param paint The paint to render with 724 */ 725 void drawConvexPath(const SkPath& path, const SkPaint* paint); 726 727 /** 728 * Draws a textured rectangle with the specified texture. The specified coordinates 729 * are transformed by the current snapshot's transform matrix. 730 * 731 * @param left The left coordinate of the rectangle 732 * @param top The top coordinate of the rectangle 733 * @param right The right coordinate of the rectangle 734 * @param bottom The bottom coordinate of the rectangle 735 * @param texture The texture to use 736 * @param paint The paint containing the alpha, blending mode, etc. 737 */ 738 void drawTextureRect(float left, float top, float right, float bottom, 739 Texture* texture, const SkPaint* paint); 740 741 /** 742 * Draws a textured mesh with the specified texture. If the indices are omitted, 743 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 744 * VBO is bound. 745 * 746 * @param left The left coordinate of the rectangle 747 * @param top The top coordinate of the rectangle 748 * @param right The right coordinate of the rectangle 749 * @param bottom The bottom coordinate of the rectangle 750 * @param texture The texture name to map onto the rectangle 751 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 752 * @param blend True if the texture contains an alpha channel 753 * @param vertices The vertices that define the mesh 754 * @param texCoords The texture coordinates of each vertex 755 * @param elementsCount The number of elements in the mesh, required by indices 756 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 757 * @param ignoreTransform True if the current transform should be ignored 758 * @param vbo The VBO used to draw the mesh 759 * @param modelViewMode Defines whether the model view matrix should be scaled 760 * @param dirty True if calling this method should dirty the current layer 761 */ 762 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 763 const SkPaint* paint, bool blend, 764 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 765 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 766 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 767 768 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 769 const SkPaint* paint, bool blend, 770 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 771 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 772 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 773 774 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 775 GLuint texture, const SkPaint* paint, 776 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 777 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 778 bool dirty = true); 779 780 /** 781 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 782 * If the number of vertices to draw exceeds the number of indices we have 783 * pre-allocated, this method will generate several glDrawElements() calls. 784 */ 785 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 786 787 /** 788 * Draws text underline and strike-through if needed. 789 * 790 * @param text The text to decor 791 * @param bytesCount The number of bytes in the text 792 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 793 * @param x The x coordinate where the text will be drawn 794 * @param y The y coordinate where the text will be drawn 795 * @param paint The paint to draw the text with 796 */ 797 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 798 799 /** 800 * Draws shadow layer on text (with optional positions). 801 * 802 * @param paint The paint to draw the shadow with 803 * @param text The text to draw 804 * @param bytesCount The number of bytes in the text 805 * @param count The number of glyphs in the text 806 * @param positions The x, y positions of individual glyphs (or NULL) 807 * @param fontRenderer The font renderer object 808 * @param alpha The alpha value for drawing the shadow 809 * @param x The x coordinate where the shadow will be drawn 810 * @param y The y coordinate where the shadow will be drawn 811 */ 812 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 813 const float* positions, FontRenderer& fontRenderer, int alpha, 814 float x, float y); 815 816 /** 817 * Draws a path texture. Path textures are alpha8 bitmaps that need special 818 * compositing to apply colors/filters/etc. 819 * 820 * @param texture The texture to render 821 * @param x The x coordinate where the texture will be drawn 822 * @param y The y coordinate where the texture will be drawn 823 * @param paint The paint to draw the texture with 824 */ 825 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 826 827 /** 828 * Resets the texture coordinates stored in mMeshVertices. Setting the values 829 * back to default is achieved by calling: 830 * 831 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 832 * 833 * @param u1 The left coordinate of the texture 834 * @param v1 The bottom coordinate of the texture 835 * @param u2 The right coordinate of the texture 836 * @param v2 The top coordinate of the texture 837 */ 838 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 839 840 /** 841 * Returns true if the specified paint will draw invisible text. 842 */ 843 bool canSkipText(const SkPaint* paint) const; 844 845 /** 846 * Binds the specified texture. The texture unit must have been selected 847 * prior to calling this method. 848 */ 849 inline void bindTexture(GLuint texture) { 850 mCaches.bindTexture(texture); 851 } 852 853 /** 854 * Binds the specified EGLImage texture. The texture unit must have been selected 855 * prior to calling this method. 856 */ 857 inline void bindExternalTexture(GLuint texture) { 858 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 859 } 860 861 /** 862 * Enable or disable blending as necessary. This function sets the appropriate 863 * blend function based on the specified xfermode. 864 */ 865 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 866 bool swapSrcDst = false); 867 868 /** 869 * Use the specified program with the current GL context. If the program is already 870 * in use, it will not be bound again. If it is not in use, the current program is 871 * marked unused and the specified program becomes used and becomes the new 872 * current program. 873 * 874 * @param program The program to use 875 * 876 * @return true If the specified program was already in use, false otherwise. 877 */ 878 inline bool useProgram(Program* program); 879 880 /** 881 * Invoked before any drawing operation. This sets required state. 882 */ 883 void setupDraw(bool clear = true); 884 885 /** 886 * Various methods to setup OpenGL rendering. 887 */ 888 void setupDrawWithTexture(bool isAlpha8 = false); 889 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 890 void setupDrawWithExternalTexture(); 891 void setupDrawNoTexture(); 892 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 893 void setupDrawColor(int color, int alpha); 894 void setupDrawColor(float r, float g, float b, float a); 895 void setupDrawAlpha8Color(int color, int alpha); 896 void setupDrawTextGamma(const SkPaint* paint); 897 void setupDrawShader(const SkShader* shader); 898 void setupDrawColorFilter(const SkColorFilter* filter); 899 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 900 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 901 void setupDrawProgram(); 902 void setupDrawDirtyRegionsDisabled(); 903 904 /** 905 * Setup the current program matrices based upon the nature of the geometry. 906 * 907 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 908 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 909 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 910 * transformations are stored in the modelView matrix and uploaded to the shader. 911 * 912 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 913 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 914 * 915 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 916 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 917 * or when simple translation has been extracted) 918 */ 919 void setupDrawModelView(ModelViewMode mode, bool offset, 920 float left, float top, float right, float bottom, bool ignoreTransform = false); 921 void setupDrawColorUniforms(bool hasShader); 922 void setupDrawPureColorUniforms(); 923 924 /** 925 * Setup uniforms for the current shader. 926 * 927 * @param shader SkShader on the current paint. 928 * 929 * @param ignoreTransform Set to true to ignore the transform in shader. 930 */ 931 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 932 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 933 void setupDrawSimpleMesh(); 934 void setupDrawTexture(GLuint texture); 935 void setupDrawExternalTexture(GLuint texture); 936 void setupDrawTextureTransform(); 937 void setupDrawTextureTransformUniforms(mat4& transform); 938 void setupDrawTextGammaUniforms(); 939 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 940 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 941 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 942 void setupDrawIndexedVertices(GLvoid* vertices); 943 void accountForClear(SkXfermode::Mode mode); 944 945 bool updateLayer(Layer* layer, bool inFrame); 946 void updateLayers(); 947 void flushLayers(); 948 949#if DEBUG_LAYERS_AS_REGIONS 950 /** 951 * Renders the specified region as a series of rectangles. This method 952 * is used for debugging only. 953 */ 954 void drawRegionRectsDebug(const Region& region); 955#endif 956 957 /** 958 * Renders the specified region as a series of rectangles. The region 959 * must be in screen-space coordinates. 960 */ 961 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 962 963 /** 964 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 965 * is turned on. 966 */ 967 void debugClip(); 968 969 void debugOverdraw(bool enable, bool clear); 970 void renderOverdraw(); 971 void countOverdraw(); 972 973 /** 974 * Should be invoked every time the glScissor is modified. 975 */ 976 inline void dirtyClip() { mState.setDirtyClip(true); } 977 978 inline const UvMapper& getMapper(const Texture* texture) { 979 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 980 } 981 982 /** 983 * Returns a texture object for the specified bitmap. The texture can 984 * come from the texture cache or an atlas. If this method returns 985 * NULL, the texture could not be found and/or allocated. 986 */ 987 Texture* getTexture(const SkBitmap* bitmap); 988 989 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 990 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 991 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 992 993 /** 994 * Model-view matrix used to position/size objects 995 * 996 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 997 * currentTransform(). 998 * 999 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 1000 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 1001 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 1002 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 1003 * of a bitmap. 1004 * 1005 * Used as input to SkiaShader transformation. 1006 */ 1007 mat4 mModelViewMatrix; 1008 1009 // State used to define the clipping region 1010 Rect mTilingClip; 1011 // Is the target render surface opaque 1012 bool mOpaque; 1013 // Is a frame currently being rendered 1014 bool mFrameStarted; 1015 1016 // Used to draw textured quads 1017 TextureVertex mMeshVertices[4]; 1018 1019 // Default UV mapper 1020 const UvMapper mUvMapper; 1021 1022 // shader, filters, and shadow 1023 DrawModifiers mDrawModifiers; 1024 SkPaint mFilteredPaint; 1025 1026 // Various caches 1027 Caches& mCaches; 1028 Extensions& mExtensions; 1029 RenderState& mRenderState; 1030 1031 // List of rectangles to clear after saveLayer() is invoked 1032 Vector<Rect*> mLayers; 1033 // List of layers to update at the beginning of a frame 1034 Vector< sp<Layer> > mLayerUpdates; 1035 1036 // The following fields are used to setup drawing 1037 // Used to describe the shaders to generate 1038 ProgramDescription mDescription; 1039 // Color description 1040 bool mColorSet; 1041 float mColorA, mColorR, mColorG, mColorB; 1042 // Indicates that the shader should get a color 1043 bool mSetShaderColor; 1044 // Current texture unit 1045 GLuint mTextureUnit; 1046 // Track dirty regions, true by default 1047 bool mTrackDirtyRegions; 1048 // Indicate whether we are drawing an opaque frame 1049 bool mOpaqueFrame; 1050 1051 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1052 // Properties.h 1053 bool mScissorOptimizationDisabled; 1054 1055 // No-ops start/endTiling when set 1056 bool mSuppressTiling; 1057 bool mFirstFrameAfterResize; 1058 1059 bool mSkipOutlineClip; 1060 1061 // True if anything has been drawn since the last call to 1062 // reportAndClearDirty() 1063 bool mDirty; 1064 1065 // Lighting + shadows 1066 Vector3 mLightCenter; 1067 float mLightRadius; 1068 uint8_t mAmbientShadowAlpha; 1069 uint8_t mSpotShadowAlpha; 1070 1071 // Paths kept alive for the duration of the frame 1072 std::vector<SkPath*> mTempPaths; 1073 1074 friend class Layer; 1075 friend class TextSetupFunctor; 1076 friend class DrawBitmapOp; 1077 friend class DrawPatchOp; 1078 1079}; // class OpenGLRenderer 1080 1081}; // namespace uirenderer 1082}; // namespace android 1083 1084#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1085