OpenGLRenderer.h revision 8dfaa4904205772cdceee63ef3989bcdedf1a914
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 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 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 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 437 const SkPaint* paint = nullptr); 438 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = nullptr) { 439 return quickRejectSetupScissor(bounds.left, bounds.top, 440 bounds.right, bounds.bottom, paint); 441 } 442 443 /** 444 * Compose the layer defined in the current snapshot with the layer 445 * defined by the previous snapshot. 446 * 447 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 448 * 449 * @param curent The current snapshot containing the layer to compose 450 * @param previous The previous snapshot to compose the current layer with 451 */ 452 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 453 454 /** 455 * Marks the specified region as dirty at the specified bounds. 456 */ 457 void dirtyLayerUnchecked(Rect& bounds, Region* region); 458 459 /** 460 * Returns the region of the current layer. 461 */ 462 virtual Region* getRegion() const { 463 return mState.currentRegion(); 464 } 465 466 /** 467 * Indicates whether rendering is currently targeted at a layer. 468 */ 469 virtual bool hasLayer() const { 470 return (mState.currentFlags() & Snapshot::kFlagFboTarget) && mState.currentRegion(); 471 } 472 473 474 /** 475 * Renders the specified layer as a textured quad. 476 * 477 * @param layer The layer to render 478 * @param rect The bounds of the layer 479 */ 480 void drawTextureLayer(Layer* layer, const Rect& rect); 481 482 /** 483 * Gets the alpha and xfermode out of a paint object. If the paint is null 484 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 485 * snapshot alpha, and overrideLayerAlpha 486 * 487 * @param paint The paint to extract values from 488 * @param alpha Where to store the resulting alpha 489 * @param mode Where to store the resulting xfermode 490 */ 491 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 492 493 /** 494 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 495 * 496 * @param layer The layer from which the alpha is extracted 497 */ 498 inline float getLayerAlpha(const Layer* layer) const; 499 500 /** 501 * Safely retrieves the ColorFilter from the given Paint. If the paint is 502 * null then null is returned. 503 */ 504 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 505 return paint ? paint->getColorFilter() : nullptr; 506 } 507 508 /** 509 * Safely retrieves the Shader from the given Paint. If the paint is 510 * null then null is returned. 511 */ 512 static inline const SkShader* getShader(const SkPaint* paint) { 513 return paint ? paint->getShader() : nullptr; 514 } 515 516 /** 517 * Set to true to suppress error checks at the end of a frame. 518 */ 519 virtual bool suppressErrorChecks() const { 520 return false; 521 } 522 523 inline RenderState& renderState() { return mRenderState; } 524 525 CanvasState mState; 526 527private: 528 /** 529 * Discards the content of the framebuffer if supported by the driver. 530 * This method should be called at the beginning of a frame to optimize 531 * rendering on some tiler architectures. 532 */ 533 void discardFramebuffer(float left, float top, float right, float bottom); 534 535 /** 536 * Ensures the state of the renderer is the same as the state of 537 * the GL context. 538 */ 539 void syncState(); 540 541 /** 542 * Tells the GPU what part of the screen is about to be redrawn. 543 * This method will use the current layer space clip rect. 544 * This method needs to be invoked every time getTargetFbo() is 545 * bound again. 546 */ 547 void startTilingCurrentClip(bool opaque = false, bool expand = false); 548 549 /** 550 * Tells the GPU what part of the screen is about to be redrawn. 551 * This method needs to be invoked every time getTargetFbo() is 552 * bound again. 553 */ 554 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 555 556 /** 557 * Tells the GPU that we are done drawing the frame or that we 558 * are switching to another render target. 559 */ 560 void endTiling(); 561 562 /** 563 * Sets the clipping rectangle using glScissor. The clip is defined by 564 * the current snapshot's clipRect member. 565 */ 566 void setScissorFromClip(); 567 568 /** 569 * Sets the clipping region using the stencil buffer. The clip region 570 * is defined by the current snapshot's clipRegion member. 571 */ 572 void setStencilFromClip(); 573 574 /** 575 * Given the local bounds of the layer, calculates ... 576 */ 577 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 578 579 /** 580 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 581 */ 582 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 583 bool fboLayer, int alpha); 584 585 /** 586 * Creates a new layer stored in the specified snapshot. 587 * 588 * @param snapshot The snapshot associated with the new layer 589 * @param left The left coordinate of the layer 590 * @param top The top coordinate of the layer 591 * @param right The right coordinate of the layer 592 * @param bottom The bottom coordinate of the layer 593 * @param alpha The translucency of the layer 594 * @param mode The blending mode of the layer 595 * @param flags The layer save flags 596 * @param mask A mask to use when drawing the layer back, may be empty 597 * 598 * @return True if the layer was successfully created, false otherwise 599 */ 600 bool createLayer(float left, float top, float right, float bottom, 601 const SkPaint* paint, int flags, const SkPath* convexMask); 602 603 /** 604 * Creates a new layer stored in the specified snapshot as an FBO. 605 * 606 * @param layer The layer to store as an FBO 607 * @param snapshot The snapshot associated with the new layer 608 * @param bounds The bounds of the layer 609 */ 610 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 611 612 /** 613 * Compose the specified layer as a region. 614 * 615 * @param layer The layer to compose 616 * @param rect The layer's bounds 617 */ 618 void composeLayerRegion(Layer* layer, const Rect& rect); 619 620 /** 621 * Compose the specified layer as a simple rectangle. 622 * 623 * @param layer The layer to compose 624 * @param rect The layer's bounds 625 * @param swap If true, the source and destination are swapped 626 */ 627 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 628 629 /** 630 * Clears all the regions corresponding to the current list of layers. 631 * This method MUST be invoked before any drawing operation. 632 */ 633 void clearLayerRegions(); 634 635 /** 636 * Mark the layer as dirty at the specified coordinates. The coordinates 637 * are transformed with the supplied matrix. 638 */ 639 void dirtyLayer(const float left, const float top, 640 const float right, const float bottom, const mat4 transform); 641 642 /** 643 * Mark the layer as dirty at the specified coordinates. 644 */ 645 void dirtyLayer(const float left, const float top, 646 const float right, const float bottom); 647 648 /** 649 * Draws a colored rectangle with the specified color. The specified coordinates 650 * are transformed by the current snapshot's transform matrix unless specified 651 * otherwise. 652 * 653 * @param left The left coordinate of the rectangle 654 * @param top The top coordinate of the rectangle 655 * @param right The right coordinate of the rectangle 656 * @param bottom The bottom coordinate of the rectangle 657 * @param paint The paint containing the color, blending mode, etc. 658 * @param ignoreTransform True if the current transform should be ignored 659 */ 660 void drawColorRect(float left, float top, float right, float bottom, 661 const SkPaint* paint, bool ignoreTransform = false); 662 663 /** 664 * Draws a series of colored rectangles with the specified color. The specified 665 * coordinates are transformed by the current snapshot's transform matrix unless 666 * specified otherwise. 667 * 668 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 669 * per rectangle 670 * @param paint The paint containing the color, blending mode, etc. 671 * @param ignoreTransform True if the current transform should be ignored 672 * @param dirty True if calling this method should dirty the current layer 673 * @param clip True if the rects should be clipped, false otherwise 674 */ 675 void drawColorRects(const float* rects, int count, const SkPaint* paint, 676 bool ignoreTransform = false, bool dirty = true, bool clip = true); 677 678 /** 679 * Draws the shape represented by the specified path texture. 680 * This method invokes drawPathTexture() but takes into account 681 * the extra left/top offset and the texture offset to correctly 682 * position the final shape. 683 * 684 * @param left The left coordinate of the shape to render 685 * @param top The top coordinate of the shape to render 686 * @param texture The texture reprsenting the shape 687 * @param paint The paint to draw the shape with 688 */ 689 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 690 691 /** 692 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 693 * different compositing rules. 694 * 695 * @param texture The texture to draw with 696 * @param left The x coordinate of the bitmap 697 * @param top The y coordinate of the bitmap 698 * @param paint The paint to render with 699 */ 700 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 701 702 /** 703 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 704 * 705 * @param vertexBuffer The VertexBuffer to be drawn 706 * @param paint The paint to render with 707 * @param flags flags with which to draw 708 */ 709 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 710 const SkPaint* paint, int flags = 0); 711 712 /** 713 * Convenience for translating method 714 */ 715 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 716 const SkPaint* paint, int flags = 0) { 717 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 718 } 719 720 /** 721 * Renders the convex hull defined by the specified path as a strip of polygons. 722 * 723 * @param path The hull of the path to draw 724 * @param paint The paint to render with 725 */ 726 void drawConvexPath(const SkPath& path, const SkPaint* paint); 727 728 /** 729 * Draws a textured rectangle with the specified texture. The specified coordinates 730 * are transformed by the current snapshot's transform matrix. 731 * 732 * @param left The left coordinate of the rectangle 733 * @param top The top coordinate of the rectangle 734 * @param right The right coordinate of the rectangle 735 * @param bottom The bottom coordinate of the rectangle 736 * @param texture The texture to use 737 * @param paint The paint containing the alpha, blending mode, etc. 738 */ 739 void drawTextureRect(float left, float top, float right, float bottom, 740 Texture* texture, const SkPaint* paint); 741 742 /** 743 * Draws a textured mesh with the specified texture. If the indices are omitted, 744 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 745 * VBO is bound. 746 * 747 * @param left The left coordinate of the rectangle 748 * @param top The top coordinate of the rectangle 749 * @param right The right coordinate of the rectangle 750 * @param bottom The bottom coordinate of the rectangle 751 * @param texture The texture name to map onto the rectangle 752 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 753 * @param blend True if the texture contains an alpha channel 754 * @param vertices The vertices that define the mesh 755 * @param texCoords The texture coordinates of each vertex 756 * @param elementsCount The number of elements in the mesh, required by indices 757 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 758 * @param ignoreTransform True if the current transform should be ignored 759 * @param vbo The VBO used to draw the mesh 760 * @param modelViewMode Defines whether the model view matrix should be scaled 761 * @param dirty True if calling this method should dirty the current layer 762 */ 763 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 764 const SkPaint* paint, bool blend, 765 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 766 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 767 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 768 769 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 770 const SkPaint* paint, bool blend, 771 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 772 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 773 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 774 775 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 776 GLuint texture, const SkPaint* paint, 777 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 778 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 779 bool dirty = true); 780 781 /** 782 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 783 * If the number of vertices to draw exceeds the number of indices we have 784 * pre-allocated, this method will generate several glDrawElements() calls. 785 */ 786 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 787 788 /** 789 * Draws text underline and strike-through if needed. 790 * 791 * @param text The text to decor 792 * @param bytesCount The number of bytes in the text 793 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 794 * @param x The x coordinate where the text will be drawn 795 * @param y The y coordinate where the text will be drawn 796 * @param paint The paint to draw the text with 797 */ 798 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 799 800 /** 801 * Draws shadow layer on text (with optional positions). 802 * 803 * @param paint The paint to draw the shadow with 804 * @param text The text to draw 805 * @param bytesCount The number of bytes in the text 806 * @param count The number of glyphs in the text 807 * @param positions The x, y positions of individual glyphs (or NULL) 808 * @param fontRenderer The font renderer object 809 * @param alpha The alpha value for drawing the shadow 810 * @param x The x coordinate where the shadow will be drawn 811 * @param y The y coordinate where the shadow will be drawn 812 */ 813 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 814 const float* positions, FontRenderer& fontRenderer, int alpha, 815 float x, float y); 816 817 /** 818 * Draws a path texture. Path textures are alpha8 bitmaps that need special 819 * compositing to apply colors/filters/etc. 820 * 821 * @param texture The texture to render 822 * @param x The x coordinate where the texture will be drawn 823 * @param y The y coordinate where the texture will be drawn 824 * @param paint The paint to draw the texture with 825 */ 826 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 827 828 /** 829 * Resets the texture coordinates stored in mMeshVertices. Setting the values 830 * back to default is achieved by calling: 831 * 832 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 833 * 834 * @param u1 The left coordinate of the texture 835 * @param v1 The bottom coordinate of the texture 836 * @param u2 The right coordinate of the texture 837 * @param v2 The top coordinate of the texture 838 */ 839 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 840 841 /** 842 * Returns true if the specified paint will draw invisible text. 843 */ 844 bool canSkipText(const SkPaint* paint) const; 845 846 /** 847 * Binds the specified texture. The texture unit must have been selected 848 * prior to calling this method. 849 */ 850 inline void bindTexture(GLuint texture) { 851 mCaches.bindTexture(texture); 852 } 853 854 /** 855 * Binds the specified EGLImage texture. The texture unit must have been selected 856 * prior to calling this method. 857 */ 858 inline void bindExternalTexture(GLuint texture) { 859 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 860 } 861 862 /** 863 * Enable or disable blending as necessary. This function sets the appropriate 864 * blend function based on the specified xfermode. 865 */ 866 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 867 bool swapSrcDst = false); 868 869 /** 870 * Use the specified program with the current GL context. If the program is already 871 * in use, it will not be bound again. If it is not in use, the current program is 872 * marked unused and the specified program becomes used and becomes the new 873 * current program. 874 * 875 * @param program The program to use 876 * 877 * @return true If the specified program was already in use, false otherwise. 878 */ 879 inline bool useProgram(Program* program); 880 881 /** 882 * Invoked before any drawing operation. This sets required state. 883 */ 884 void setupDraw(bool clear = true); 885 886 /** 887 * Various methods to setup OpenGL rendering. 888 */ 889 void setupDrawWithTexture(bool isAlpha8 = false); 890 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 891 void setupDrawWithExternalTexture(); 892 void setupDrawNoTexture(); 893 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 894 void setupDrawColor(int color, int alpha); 895 void setupDrawColor(float r, float g, float b, float a); 896 void setupDrawAlpha8Color(int color, int alpha); 897 void setupDrawTextGamma(const SkPaint* paint); 898 void setupDrawShader(const SkShader* shader); 899 void setupDrawColorFilter(const SkColorFilter* filter); 900 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 901 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 902 void setupDrawProgram(); 903 void setupDrawDirtyRegionsDisabled(); 904 905 /** 906 * Setup the current program matrices based upon the nature of the geometry. 907 * 908 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 909 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 910 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 911 * transformations are stored in the modelView matrix and uploaded to the shader. 912 * 913 * @param offset Set to true if the the matrix should be fudged (translated) slightly to 914 * disambiguate geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 915 * 916 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 917 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 918 * or when simple translation has been extracted) 919 */ 920 void setupDrawModelView(ModelViewMode mode, bool offset, 921 float left, float top, float right, float bottom, bool ignoreTransform = false); 922 void setupDrawColorUniforms(bool hasShader); 923 void setupDrawPureColorUniforms(); 924 925 /** 926 * Setup uniforms for the current shader. 927 * 928 * @param shader SkShader on the current paint. 929 * 930 * @param ignoreTransform Set to true to ignore the transform in shader. 931 */ 932 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 933 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 934 void setupDrawSimpleMesh(); 935 void setupDrawTexture(GLuint texture); 936 void setupDrawExternalTexture(GLuint texture); 937 void setupDrawTextureTransform(); 938 void setupDrawTextureTransformUniforms(mat4& transform); 939 void setupDrawTextGammaUniforms(); 940 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = nullptr, GLuint vbo = 0); 941 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 942 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 943 void setupDrawIndexedVertices(GLvoid* vertices); 944 void accountForClear(SkXfermode::Mode mode); 945 946 bool updateLayer(Layer* layer, bool inFrame); 947 void updateLayers(); 948 void flushLayers(); 949 950#if DEBUG_LAYERS_AS_REGIONS 951 /** 952 * Renders the specified region as a series of rectangles. This method 953 * is used for debugging only. 954 */ 955 void drawRegionRectsDebug(const Region& region); 956#endif 957 958 /** 959 * Renders the specified region as a series of rectangles. The region 960 * must be in screen-space coordinates. 961 */ 962 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 963 964 /** 965 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 966 * is turned on. 967 */ 968 void debugClip(); 969 970 void debugOverdraw(bool enable, bool clear); 971 void renderOverdraw(); 972 void countOverdraw(); 973 974 /** 975 * Should be invoked every time the glScissor is modified. 976 */ 977 inline void dirtyClip() { mState.setDirtyClip(true); } 978 979 inline const UvMapper& getMapper(const Texture* texture) { 980 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 981 } 982 983 /** 984 * Returns a texture object for the specified bitmap. The texture can 985 * come from the texture cache or an atlas. If this method returns 986 * NULL, the texture could not be found and/or allocated. 987 */ 988 Texture* getTexture(const SkBitmap* bitmap); 989 990 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 991 inline Snapshot* writableSnapshot() { return mState.writableSnapshot(); } 992 inline const Snapshot* currentSnapshot() const { return mState.currentSnapshot(); } 993 994 /** 995 * Model-view matrix used to position/size objects 996 * 997 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 998 * currentTransform(). 999 * 1000 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 1001 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 1002 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 1003 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 1004 * of a bitmap. 1005 * 1006 * Used as input to SkiaShader transformation. 1007 */ 1008 mat4 mModelViewMatrix; 1009 1010 // State used to define the clipping region 1011 Rect mTilingClip; 1012 // Is the target render surface opaque 1013 bool mOpaque; 1014 // Is a frame currently being rendered 1015 bool mFrameStarted; 1016 1017 // Used to draw textured quads 1018 TextureVertex mMeshVertices[4]; 1019 1020 // Default UV mapper 1021 const UvMapper mUvMapper; 1022 1023 // shader, filters, and shadow 1024 DrawModifiers mDrawModifiers; 1025 SkPaint mFilteredPaint; 1026 1027 // Various caches 1028 Caches& mCaches; 1029 Extensions& mExtensions; 1030 RenderState& mRenderState; 1031 1032 // List of rectangles to clear after saveLayer() is invoked 1033 std::vector<Rect> mLayers; 1034 // List of layers to update at the beginning of a frame 1035 Vector< sp<Layer> > mLayerUpdates; 1036 1037 // The following fields are used to setup drawing 1038 // Used to describe the shaders to generate 1039 ProgramDescription mDescription; 1040 // Color description 1041 bool mColorSet; 1042 float mColorA, mColorR, mColorG, mColorB; 1043 // Indicates that the shader should get a color 1044 bool mSetShaderColor; 1045 // Current texture unit 1046 GLuint mTextureUnit; 1047 // Track dirty regions, true by default 1048 bool mTrackDirtyRegions; 1049 // Indicate whether we are drawing an opaque frame 1050 bool mOpaqueFrame; 1051 1052 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1053 // Properties.h 1054 bool mScissorOptimizationDisabled; 1055 1056 // No-ops start/endTiling when set 1057 bool mSuppressTiling; 1058 bool mFirstFrameAfterResize; 1059 1060 bool mSkipOutlineClip; 1061 1062 // True if anything has been drawn since the last call to 1063 // reportAndClearDirty() 1064 bool mDirty; 1065 1066 // Lighting + shadows 1067 Vector3 mLightCenter; 1068 float mLightRadius; 1069 uint8_t mAmbientShadowAlpha; 1070 uint8_t mSpotShadowAlpha; 1071 1072 // Paths kept alive for the duration of the frame 1073 std::vector<std::unique_ptr<SkPath>> mTempPaths; 1074 1075 friend class Layer; 1076 friend class TextSetupFunctor; 1077 friend class DrawBitmapOp; 1078 friend class DrawPatchOp; 1079 1080}; // class OpenGLRenderer 1081 1082}; // namespace uirenderer 1083}; // namespace android 1084 1085#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1086