OpenGLRenderer.h revision 62d307c2402777d5e53b4590af5f32f8c55afd81
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 "Debug.h" 42#include "Extensions.h" 43#include "Matrix.h" 44#include "Program.h" 45#include "Rect.h" 46#include "Renderer.h" 47#include "Snapshot.h" 48#include "StatefulBaseRenderer.h" 49#include "UvMapper.h" 50#include "Vertex.h" 51#include "Caches.h" 52#include "CanvasProperty.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 reset(); 68 } 69 70 void reset() { 71 memset(this, 0, sizeof(DrawModifiers)); 72 } 73 74 float mOverrideLayerAlpha; 75 76 // Draw filters 77 bool mHasDrawFilter; 78 int mPaintFilterClearBits; 79 int mPaintFilterSetBits; 80}; 81 82enum StateDeferFlags { 83 kStateDeferFlag_Draw = 0x1, 84 kStateDeferFlag_Clip = 0x2 85}; 86 87enum ClipSideFlags { 88 kClipSide_None = 0x0, 89 kClipSide_Left = 0x1, 90 kClipSide_Top = 0x2, 91 kClipSide_Right = 0x4, 92 kClipSide_Bottom = 0x8, 93 kClipSide_Full = 0xF, 94 kClipSide_ConservativeFull = 0x1F 95}; 96 97/** 98 * Defines additional transformation that should be applied by the model view matrix, beyond that of 99 * the currentTransform() 100 */ 101enum ModelViewMode { 102 /** 103 * Used when the model view should simply translate geometry passed to the shader. The resulting 104 * matrix will be a simple translation. 105 */ 106 kModelViewMode_Translate = 0, 107 108 /** 109 * Used when the model view should translate and scale geometry. The resulting matrix will be a 110 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 111 */ 112 kModelViewMode_TranslateAndScale = 1, 113}; 114 115/////////////////////////////////////////////////////////////////////////////// 116// Renderer 117/////////////////////////////////////////////////////////////////////////////// 118/** 119 * OpenGL Renderer implementation. 120 */ 121class OpenGLRenderer : public StatefulBaseRenderer { 122public: 123 OpenGLRenderer(RenderState& renderState); 124 virtual ~OpenGLRenderer(); 125 126 void initProperties(); 127 void initLight(const Vector3& lightCenter, float lightRadius, 128 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 129 130 virtual void onViewportInitialized(); 131 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 132 virtual void finish(); 133 134 void setCountOverdrawEnabled(bool enabled) { 135 mCountOverdraw = enabled; 136 } 137 138 float getOverdraw() { 139 return mCountOverdraw ? mOverdraw : 0.0f; 140 } 141 142 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 143 144 void pushLayerUpdate(Layer* layer); 145 void cancelLayerUpdate(Layer* layer); 146 void clearLayerUpdates(); 147 void flushLayerUpdates(); 148 149 virtual int saveLayer(float left, float top, float right, float bottom, 150 const SkPaint* paint, int flags) { 151 return saveLayer(left, top, right, bottom, paint, flags, NULL); 152 } 153 154 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 155 // created, which will in turn clip to that mask when drawn back/restored. 156 int saveLayer(float left, float top, float right, float bottom, 157 const SkPaint* paint, int flags, const SkPath* convexMask); 158 159 int saveLayerDeferred(float left, float top, float right, float bottom, 160 const SkPaint* paint, int flags); 161 162 virtual status_t drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 163 virtual status_t drawLayer(Layer* layer, float x, float y); 164 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 165 const SkPaint* paint); 166 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 167 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 168 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix& matrix, 169 const SkPaint* paint); 170 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 171 float srcRight, float srcBottom, float dstLeft, float dstTop, 172 float dstRight, float dstBottom, const SkPaint* paint); 173 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 174 const SkPaint* paint); 175 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 176 const float* vertices, const int* colors, const SkPaint* paint); 177 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 178 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 179 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 180 float left, float top, float right, float bottom, const SkPaint* paint); 181 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 182 float left, float top, float right, float bottom, const SkPaint* paint); 183 virtual status_t drawColor(int color, SkXfermode::Mode mode); 184 virtual status_t drawRect(float left, float top, float right, float bottom, 185 const SkPaint* paint); 186 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 187 float rx, float ry, const SkPaint* paint); 188 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 189 virtual status_t drawOval(float left, float top, float right, float bottom, 190 const SkPaint* paint); 191 virtual status_t drawArc(float left, float top, float right, float bottom, 192 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 193 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 194 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 195 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 196 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 197 float hOffset, float vOffset, const SkPaint* paint); 198 virtual status_t drawPosText(const char* text, int bytesCount, int count, 199 const float* positions, const SkPaint* paint); 200 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 201 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 202 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 203 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 204 205 status_t drawShadow(float casterAlpha, 206 const VertexBuffer* ambientShadowVertexBuffer, const VertexBuffer* spotShadowVertexBuffer); 207 208 virtual void resetPaintFilter(); 209 virtual void setupPaintFilter(int clearBits, int setBits); 210 211 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 212 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 213 214 const SkPaint* filterPaint(const SkPaint* paint); 215 216 /** 217 * Store the current display state (most importantly, the current clip and transform), and 218 * additionally map the state's bounds from local to window coordinates. 219 * 220 * Returns true if quick-rejected 221 */ 222 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 223 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 224 void setupMergedMultiDraw(const Rect* clipRect); 225 226 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 227 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 228 229 bool isCurrentTransformSimple() { 230 return currentTransform()->isSimple(); 231 } 232 233 Caches& getCaches() { 234 return mCaches; 235 } 236 237 // simple rect clip 238 bool isCurrentClipSimple() { 239 return mSnapshot->clipRegion->isEmpty(); 240 } 241 242 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 243 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 244 245 /** 246 * Scales the alpha on the current snapshot. This alpha value will be modulated 247 * with other alpha values when drawing primitives. 248 */ 249 void scaleAlpha(float alpha) { 250 mSnapshot->alpha *= alpha; 251 } 252 253 /** 254 * Inserts a named event marker in the stream of GL commands. 255 */ 256 void eventMark(const char* name) const; 257 258 /** 259 * Inserts a formatted event marker in the stream of GL commands. 260 */ 261 void eventMarkDEBUG(const char *fmt, ...) const; 262 263 /** 264 * Inserts a named group marker in the stream of GL commands. This marker 265 * can be used by tools to group commands into logical groups. A call to 266 * this method must always be followed later on by a call to endMark(). 267 */ 268 void startMark(const char* name) const; 269 270 /** 271 * Closes the last group marker opened by startMark(). 272 */ 273 void endMark() const; 274 275 /** 276 * Gets the alpha and xfermode out of a paint object. If the paint is null 277 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 278 * not multiply the paint's alpha by the current snapshot's alpha, and does 279 * not replace the alpha with the overrideLayerAlpha 280 * 281 * @param paint The paint to extract values from 282 * @param alpha Where to store the resulting alpha 283 * @param mode Where to store the resulting xfermode 284 */ 285 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 286 *mode = getXfermodeDirect(paint); 287 *alpha = getAlphaDirect(paint); 288 } 289 290 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 291 if (!paint) return SkXfermode::kSrcOver_Mode; 292 return getXfermode(paint->getXfermode()); 293 } 294 295 static inline int getAlphaDirect(const SkPaint* paint) { 296 if (!paint) return 255; 297 return paint->getAlpha(); 298 } 299 300 struct TextShadow { 301 SkScalar radius; 302 float dx; 303 float dy; 304 SkColor color; 305 }; 306 307 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 308 SkDrawLooper::BlurShadowRec blur; 309 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 310 if (textShadow) { 311 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 312 textShadow->dx = blur.fOffset.fX; 313 textShadow->dy = blur.fOffset.fY; 314 textShadow->color = blur.fColor; 315 } 316 return true; 317 } 318 return false; 319 } 320 321 static inline bool hasTextShadow(const SkPaint* paint) { 322 return getTextShadow(paint, NULL); 323 } 324 325 /** 326 * Build the best transform to use to rasterize text given a full 327 * transform matrix, and whether filteration is needed. 328 * 329 * Returns whether filtration is needed 330 */ 331 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 332 333#if DEBUG_MERGE_BEHAVIOR 334 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 335 mCaches.setScissorEnabled(false); 336 337 // should only be called outside of other draw ops, so stencil can only be in test state 338 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 339 mCaches.stencil.disable(); 340 341 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 342 343 if (stencilWasEnabled) mCaches.stencil.enableTest(); 344 } 345#endif 346 347 const Vector3& getLightCenter() const { return mLightCenter; } 348 float getLightRadius() const { return mLightRadius; } 349 350protected: 351 /** 352 * Perform the setup specific to a frame. This method does not 353 * issue any OpenGL commands. 354 */ 355 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 356 357 /** 358 * Indicates the start of rendering. This method will setup the 359 * initial OpenGL state (viewport, clearing the buffer, etc.) 360 */ 361 status_t startFrame(); 362 363 /** 364 * Clears the underlying surface if needed. 365 */ 366 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 367 368 /** 369 * Call this method after updating a layer during a drawing pass. 370 */ 371 void resumeAfterLayer(); 372 373 /** 374 * This method is called whenever a stencil buffer is required. Subclasses 375 * should override this method and call attachStencilBufferToLayer() on the 376 * appropriate layer(s). 377 */ 378 virtual void ensureStencilBuffer(); 379 380 /** 381 * Obtains a stencil render buffer (allocating it if necessary) and 382 * attaches it to the specified layer. 383 */ 384 void attachStencilBufferToLayer(Layer* layer); 385 386 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 387 const SkPaint* paint = NULL); 388 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 389 return quickRejectSetupScissor(bounds.left, bounds.top, 390 bounds.right, bounds.bottom, paint); 391 } 392 393 /** 394 * Compose the layer defined in the current snapshot with the layer 395 * defined by the previous snapshot. 396 * 397 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 398 * 399 * @param curent The current snapshot containing the layer to compose 400 * @param previous The previous snapshot to compose the current layer with 401 */ 402 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 403 404 /** 405 * Marks the specified region as dirty at the specified bounds. 406 */ 407 void dirtyLayerUnchecked(Rect& bounds, Region* region); 408 409 /** 410 * Returns the region of the current layer. 411 */ 412 virtual Region* getRegion() const { 413 return mSnapshot->region; 414 } 415 416 /** 417 * Indicates whether rendering is currently targeted at a layer. 418 */ 419 virtual bool hasLayer() const { 420 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 421 } 422 423 /** 424 * Returns the name of the FBO this renderer is rendering into. 425 */ 426 virtual GLuint getTargetFbo() const { 427 return 0; 428 } 429 430 /** 431 * Renders the specified layer as a textured quad. 432 * 433 * @param layer The layer to render 434 * @param rect The bounds of the layer 435 */ 436 void drawTextureLayer(Layer* layer, const Rect& rect); 437 438 /** 439 * Gets the alpha and xfermode out of a paint object. If the paint is null 440 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 441 * snapshot alpha, and overrideLayerAlpha 442 * 443 * @param paint The paint to extract values from 444 * @param alpha Where to store the resulting alpha 445 * @param mode Where to store the resulting xfermode 446 */ 447 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 448 449 /** 450 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 451 * 452 * @param layer The layer from which the alpha is extracted 453 */ 454 inline float getLayerAlpha(const Layer* layer) const; 455 456 /** 457 * Safely retrieves the ColorFilter from the given Paint. If the paint is 458 * null then null is returned. 459 */ 460 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 461 return paint ? paint->getColorFilter() : NULL; 462 } 463 464 /** 465 * Safely retrieves the Shader from the given Paint. If the paint is 466 * null then null is returned. 467 */ 468 static inline const SkShader* getShader(const SkPaint* paint) { 469 return paint ? paint->getShader() : NULL; 470 } 471 472 /** 473 * Set to true to suppress error checks at the end of a frame. 474 */ 475 virtual bool suppressErrorChecks() const { 476 return false; 477 } 478 479 inline RenderState& renderState() { return mRenderState; } 480 481private: 482 /** 483 * Discards the content of the framebuffer if supported by the driver. 484 * This method should be called at the beginning of a frame to optimize 485 * rendering on some tiler architectures. 486 */ 487 void discardFramebuffer(float left, float top, float right, float bottom); 488 489 /** 490 * Ensures the state of the renderer is the same as the state of 491 * the GL context. 492 */ 493 void syncState(); 494 495 /** 496 * Tells the GPU what part of the screen is about to be redrawn. 497 * This method will use the current layer space clip rect. 498 * This method needs to be invoked every time getTargetFbo() is 499 * bound again. 500 */ 501 void startTilingCurrentClip(bool opaque = false, bool expand = false); 502 503 /** 504 * Tells the GPU what part of the screen is about to be redrawn. 505 * This method needs to be invoked every time getTargetFbo() is 506 * bound again. 507 */ 508 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 509 510 /** 511 * Tells the GPU that we are done drawing the frame or that we 512 * are switching to another render target. 513 */ 514 void endTiling(); 515 516 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 517 518 /** 519 * Sets the clipping rectangle using glScissor. The clip is defined by 520 * the current snapshot's clipRect member. 521 */ 522 void setScissorFromClip(); 523 524 /** 525 * Sets the clipping region using the stencil buffer. The clip region 526 * is defined by the current snapshot's clipRegion member. 527 */ 528 void setStencilFromClip(); 529 530 /** 531 * Given the local bounds of the layer, calculates ... 532 */ 533 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 534 535 /** 536 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 537 */ 538 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 539 bool fboLayer, int alpha); 540 541 /** 542 * Creates a new layer stored in the specified snapshot. 543 * 544 * @param snapshot The snapshot associated with the new layer 545 * @param left The left coordinate of the layer 546 * @param top The top coordinate of the layer 547 * @param right The right coordinate of the layer 548 * @param bottom The bottom coordinate of the layer 549 * @param alpha The translucency of the layer 550 * @param mode The blending mode of the layer 551 * @param flags The layer save flags 552 * @param mask A mask to use when drawing the layer back, may be empty 553 * 554 * @return True if the layer was successfully created, false otherwise 555 */ 556 bool createLayer(float left, float top, float right, float bottom, 557 const SkPaint* paint, int flags, const SkPath* convexMask); 558 559 /** 560 * Creates a new layer stored in the specified snapshot as an FBO. 561 * 562 * @param layer The layer to store as an FBO 563 * @param snapshot The snapshot associated with the new layer 564 * @param bounds The bounds of the layer 565 */ 566 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 567 568 /** 569 * Compose the specified layer as a region. 570 * 571 * @param layer The layer to compose 572 * @param rect The layer's bounds 573 */ 574 void composeLayerRegion(Layer* layer, const Rect& rect); 575 576 /** 577 * Compose the specified layer as a simple rectangle. 578 * 579 * @param layer The layer to compose 580 * @param rect The layer's bounds 581 * @param swap If true, the source and destination are swapped 582 */ 583 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 584 585 /** 586 * Clears all the regions corresponding to the current list of layers. 587 * This method MUST be invoked before any drawing operation. 588 */ 589 void clearLayerRegions(); 590 591 /** 592 * Mark the layer as dirty at the specified coordinates. The coordinates 593 * are transformed with the supplied matrix. 594 */ 595 void dirtyLayer(const float left, const float top, 596 const float right, const float bottom, const mat4 transform); 597 598 /** 599 * Mark the layer as dirty at the specified coordinates. 600 */ 601 void dirtyLayer(const float left, const float top, 602 const float right, const float bottom); 603 604 /** 605 * Draws a colored rectangle with the specified color. The specified coordinates 606 * are transformed by the current snapshot's transform matrix unless specified 607 * otherwise. 608 * 609 * @param left The left coordinate of the rectangle 610 * @param top The top coordinate of the rectangle 611 * @param right The right coordinate of the rectangle 612 * @param bottom The bottom coordinate of the rectangle 613 * @param paint The paint containing the color, blending mode, etc. 614 * @param ignoreTransform True if the current transform should be ignored 615 */ 616 void drawColorRect(float left, float top, float right, float bottom, 617 const SkPaint* paint, bool ignoreTransform = false); 618 619 /** 620 * Draws a series of colored rectangles with the specified color. The specified 621 * coordinates are transformed by the current snapshot's transform matrix unless 622 * specified otherwise. 623 * 624 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 625 * per rectangle 626 * @param paint The paint containing the color, blending mode, etc. 627 * @param ignoreTransform True if the current transform should be ignored 628 * @param dirty True if calling this method should dirty the current layer 629 * @param clip True if the rects should be clipped, false otherwise 630 */ 631 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 632 bool ignoreTransform = false, bool dirty = true, bool clip = true); 633 634 /** 635 * Draws the shape represented by the specified path texture. 636 * This method invokes drawPathTexture() but takes into account 637 * the extra left/top offset and the texture offset to correctly 638 * position the final shape. 639 * 640 * @param left The left coordinate of the shape to render 641 * @param top The top coordinate of the shape to render 642 * @param texture The texture reprsenting the shape 643 * @param paint The paint to draw the shape with 644 */ 645 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 646 647 /** 648 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 649 * different compositing rules. 650 * 651 * @param texture The texture to draw with 652 * @param left The x coordinate of the bitmap 653 * @param top The y coordinate of the bitmap 654 * @param paint The paint to render with 655 */ 656 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 657 658 /** 659 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 660 * 661 * @param vertexBuffer The VertexBuffer to be drawn 662 * @param paint The paint to render with 663 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 664 */ 665 status_t drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 666 const SkPaint* paint, bool useOffset = false); 667 668 /** 669 * Convenience for translating method 670 */ 671 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, 672 const SkPaint* paint, bool useOffset = false) { 673 return drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, useOffset); 674 } 675 676 /** 677 * Renders the convex hull defined by the specified path as a strip of polygons. 678 * 679 * @param path The hull of the path to draw 680 * @param paint The paint to render with 681 */ 682 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 683 684 /** 685 * Draws a textured rectangle with the specified texture. The specified coordinates 686 * are transformed by the current snapshot's transform matrix. 687 * 688 * @param left The left coordinate of the rectangle 689 * @param top The top coordinate of the rectangle 690 * @param right The right coordinate of the rectangle 691 * @param bottom The bottom coordinate of the rectangle 692 * @param texture The texture to use 693 * @param paint The paint containing the alpha, blending mode, etc. 694 */ 695 void drawTextureRect(float left, float top, float right, float bottom, 696 Texture* texture, const SkPaint* paint); 697 698 /** 699 * Draws a textured mesh with the specified texture. If the indices are omitted, 700 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 701 * VBO is bound. 702 * 703 * @param left The left coordinate of the rectangle 704 * @param top The top coordinate of the rectangle 705 * @param right The right coordinate of the rectangle 706 * @param bottom The bottom coordinate of the rectangle 707 * @param texture The texture name to map onto the rectangle 708 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 709 * @param blend True if the texture contains an alpha channel 710 * @param vertices The vertices that define the mesh 711 * @param texCoords The texture coordinates of each vertex 712 * @param elementsCount The number of elements in the mesh, required by indices 713 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 714 * @param ignoreTransform True if the current transform should be ignored 715 * @param vbo The VBO used to draw the mesh 716 * @param modelViewMode Defines whether the model view matrix should be scaled 717 * @param dirty True if calling this method should dirty the current layer 718 */ 719 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 720 const SkPaint* paint, bool blend, 721 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 722 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 723 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 724 725 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 726 const SkPaint* paint, bool blend, 727 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 728 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 729 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 730 731 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 732 GLuint texture, const SkPaint* paint, 733 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 734 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 735 bool dirty = true); 736 737 /** 738 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 739 * If the number of vertices to draw exceeds the number of indices we have 740 * pre-allocated, this method will generate several glDrawElements() calls. 741 */ 742 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 743 744 /** 745 * Draws text underline and strike-through if needed. 746 * 747 * @param text The text to decor 748 * @param bytesCount The number of bytes in the text 749 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 750 * @param x The x coordinate where the text will be drawn 751 * @param y The y coordinate where the text will be drawn 752 * @param paint The paint to draw the text with 753 */ 754 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 755 756 /** 757 * Draws shadow layer on text (with optional positions). 758 * 759 * @param paint The paint to draw the shadow with 760 * @param text The text to draw 761 * @param bytesCount The number of bytes in the text 762 * @param count The number of glyphs in the text 763 * @param positions The x, y positions of individual glyphs (or NULL) 764 * @param fontRenderer The font renderer object 765 * @param alpha The alpha value for drawing the shadow 766 * @param x The x coordinate where the shadow will be drawn 767 * @param y The y coordinate where the shadow will be drawn 768 */ 769 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 770 const float* positions, FontRenderer& fontRenderer, int alpha, 771 float x, float y); 772 773 /** 774 * Draws a path texture. Path textures are alpha8 bitmaps that need special 775 * compositing to apply colors/filters/etc. 776 * 777 * @param texture The texture to render 778 * @param x The x coordinate where the texture will be drawn 779 * @param y The y coordinate where the texture will be drawn 780 * @param paint The paint to draw the texture with 781 */ 782 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 783 784 /** 785 * Resets the texture coordinates stored in mMeshVertices. Setting the values 786 * back to default is achieved by calling: 787 * 788 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 789 * 790 * @param u1 The left coordinate of the texture 791 * @param v1 The bottom coordinate of the texture 792 * @param u2 The right coordinate of the texture 793 * @param v2 The top coordinate of the texture 794 */ 795 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 796 797 /** 798 * Returns true if the specified paint will draw invisible text. 799 */ 800 bool canSkipText(const SkPaint* paint) const; 801 802 /** 803 * Binds the specified texture. The texture unit must have been selected 804 * prior to calling this method. 805 */ 806 inline void bindTexture(GLuint texture) { 807 mCaches.bindTexture(texture); 808 } 809 810 /** 811 * Binds the specified EGLImage texture. The texture unit must have been selected 812 * prior to calling this method. 813 */ 814 inline void bindExternalTexture(GLuint texture) { 815 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 816 } 817 818 /** 819 * Enable or disable blending as necessary. This function sets the appropriate 820 * blend function based on the specified xfermode. 821 */ 822 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 823 bool swapSrcDst = false); 824 825 /** 826 * Use the specified program with the current GL context. If the program is already 827 * in use, it will not be bound again. If it is not in use, the current program is 828 * marked unused and the specified program becomes used and becomes the new 829 * current program. 830 * 831 * @param program The program to use 832 * 833 * @return true If the specified program was already in use, false otherwise. 834 */ 835 inline bool useProgram(Program* program); 836 837 /** 838 * Invoked before any drawing operation. This sets required state. 839 */ 840 void setupDraw(bool clear = true); 841 842 /** 843 * Various methods to setup OpenGL rendering. 844 */ 845 void setupDrawWithTexture(bool isAlpha8 = false); 846 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 847 void setupDrawWithExternalTexture(); 848 void setupDrawNoTexture(); 849 void setupDrawAA(); 850 void setupDrawColor(int color, int alpha); 851 void setupDrawColor(float r, float g, float b, float a); 852 void setupDrawAlpha8Color(int color, int alpha); 853 void setupDrawTextGamma(const SkPaint* paint); 854 void setupDrawShader(const SkShader* shader); 855 void setupDrawColorFilter(const SkColorFilter* filter); 856 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 857 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 858 void setupDrawProgram(); 859 void setupDrawDirtyRegionsDisabled(); 860 861 /** 862 * Setup the current program matrices based upon the nature of the geometry. 863 * 864 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 865 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 866 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 867 * transformations are stored in the modelView matrix and uploaded to the shader. 868 * 869 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 870 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 871 * 872 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 873 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 874 * or when simple translation has been extracted) 875 */ 876 void setupDrawModelView(ModelViewMode mode, bool offset, 877 float left, float top, float right, float bottom, bool ignoreTransform = false); 878 void setupDrawColorUniforms(bool hasShader); 879 void setupDrawPureColorUniforms(); 880 881 /** 882 * Setup uniforms for the current shader. 883 * 884 * @param shader SkShader on the current paint. 885 * 886 * @param ignoreTransform Set to true to ignore the transform in shader. 887 */ 888 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 889 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 890 void setupDrawSimpleMesh(); 891 void setupDrawTexture(GLuint texture); 892 void setupDrawExternalTexture(GLuint texture); 893 void setupDrawTextureTransform(); 894 void setupDrawTextureTransformUniforms(mat4& transform); 895 void setupDrawTextGammaUniforms(); 896 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 897 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 898 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 899 void setupDrawIndexedVertices(GLvoid* vertices); 900 void accountForClear(SkXfermode::Mode mode); 901 902 bool updateLayer(Layer* layer, bool inFrame); 903 void updateLayers(); 904 void flushLayers(); 905 906#if DEBUG_LAYERS_AS_REGIONS 907 /** 908 * Renders the specified region as a series of rectangles. This method 909 * is used for debugging only. 910 */ 911 void drawRegionRectsDebug(const Region& region); 912#endif 913 914 /** 915 * Renders the specified region as a series of rectangles. The region 916 * must be in screen-space coordinates. 917 */ 918 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 919 920 /** 921 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 922 * is turned on. 923 */ 924 void debugClip(); 925 926 void debugOverdraw(bool enable, bool clear); 927 void renderOverdraw(); 928 void countOverdraw(); 929 930 /** 931 * Should be invoked every time the glScissor is modified. 932 */ 933 inline void dirtyClip() { 934 mDirtyClip = true; 935 } 936 937 inline const UvMapper& getMapper(const Texture* texture) { 938 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 939 } 940 941 /** 942 * Returns a texture object for the specified bitmap. The texture can 943 * come from the texture cache or an atlas. If this method returns 944 * NULL, the texture could not be found and/or allocated. 945 */ 946 Texture* getTexture(const SkBitmap* bitmap); 947 948 /** 949 * Model-view matrix used to position/size objects 950 * 951 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 952 * currentTransform(). 953 * 954 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 955 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 956 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 957 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 958 * of a bitmap. 959 * 960 * Used as input to SkiaShader transformation. 961 */ 962 mat4 mModelViewMatrix; 963 964 // State used to define the clipping region 965 Rect mTilingClip; 966 // Is the target render surface opaque 967 bool mOpaque; 968 // Is a frame currently being rendered 969 bool mFrameStarted; 970 971 // Used to draw textured quads 972 TextureVertex mMeshVertices[4]; 973 974 // Default UV mapper 975 const UvMapper mUvMapper; 976 977 // shader, filters, and shadow 978 DrawModifiers mDrawModifiers; 979 SkPaint mFilteredPaint; 980 981 // Various caches 982 Caches& mCaches; 983 Extensions& mExtensions; 984 RenderState& mRenderState; 985 986 // List of rectangles to clear after saveLayer() is invoked 987 Vector<Rect*> mLayers; 988 // List of layers to update at the beginning of a frame 989 Vector<Layer*> mLayerUpdates; 990 991 // The following fields are used to setup drawing 992 // Used to describe the shaders to generate 993 ProgramDescription mDescription; 994 // Color description 995 bool mColorSet; 996 float mColorA, mColorR, mColorG, mColorB; 997 // Indicates that the shader should get a color 998 bool mSetShaderColor; 999 // Current texture unit 1000 GLuint mTextureUnit; 1001 // Track dirty regions, true by default 1002 bool mTrackDirtyRegions; 1003 // Indicate whether we are drawing an opaque frame 1004 bool mOpaqueFrame; 1005 1006 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1007 // Properties.h 1008 bool mScissorOptimizationDisabled; 1009 1010 // No-ops start/endTiling when set 1011 bool mSuppressTiling; 1012 1013 // If true, this renderer will setup drawing to emulate 1014 // an increment stencil buffer in the color buffer 1015 bool mCountOverdraw; 1016 float mOverdraw; 1017 1018 bool mSkipOutlineClip; 1019 1020 // Lighting + shadows 1021 Vector3 mLightCenter; 1022 float mLightRadius; 1023 uint8_t mAmbientShadowAlpha; 1024 uint8_t mSpotShadowAlpha; 1025 1026 friend class Layer; 1027 friend class TextSetupFunctor; 1028 friend class DrawBitmapOp; 1029 friend class DrawPatchOp; 1030 1031}; // class OpenGLRenderer 1032 1033}; // namespace uirenderer 1034}; // namespace android 1035 1036#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1037