OpenGLRenderer.h revision 69e5adffb19135d51bde8e458f4907d7265f3e23
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 97enum VertexBufferDisplayFlags { 98 kVertexBuffer_Offset = 0x1, 99 kVertexBuffer_ShadowInterp = 0x2, 100}; 101 102/** 103 * Defines additional transformation that should be applied by the model view matrix, beyond that of 104 * the currentTransform() 105 */ 106enum ModelViewMode { 107 /** 108 * Used when the model view should simply translate geometry passed to the shader. The resulting 109 * matrix will be a simple translation. 110 */ 111 kModelViewMode_Translate = 0, 112 113 /** 114 * Used when the model view should translate and scale geometry. The resulting matrix will be a 115 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 116 */ 117 kModelViewMode_TranslateAndScale = 1, 118}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public StatefulBaseRenderer { 127public: 128 OpenGLRenderer(RenderState& renderState); 129 virtual ~OpenGLRenderer(); 130 131 void initProperties(); 132 void initLight(const Vector3& lightCenter, float lightRadius, 133 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 134 135 virtual void onViewportInitialized(); 136 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 137 virtual void finish(); 138 139 void setCountOverdrawEnabled(bool enabled) { 140 mCountOverdraw = enabled; 141 } 142 143 float getOverdraw() { 144 return mCountOverdraw ? mOverdraw : 0.0f; 145 } 146 147 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 148 149 void pushLayerUpdate(Layer* layer); 150 void cancelLayerUpdate(Layer* layer); 151 void clearLayerUpdates(); 152 void flushLayerUpdates(); 153 154 virtual int saveLayer(float left, float top, float right, float bottom, 155 const SkPaint* paint, int flags) { 156 return saveLayer(left, top, right, bottom, paint, flags, NULL); 157 } 158 159 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 160 // created, which will in turn clip to that mask when drawn back/restored. 161 int saveLayer(float left, float top, float right, float bottom, 162 const SkPaint* paint, int flags, const SkPath* convexMask); 163 164 int saveLayerDeferred(float left, float top, float right, float bottom, 165 const SkPaint* paint, int flags); 166 167 virtual status_t drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 168 virtual status_t drawLayer(Layer* layer, float x, float y); 169 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 170 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 171 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 172 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 173 float srcRight, float srcBottom, float dstLeft, float dstTop, 174 float dstRight, float dstBottom, const SkPaint* paint); 175 virtual status_t drawBitmapData(const SkBitmap* bitmap, const SkPaint* paint); 176 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 177 const float* vertices, const int* colors, const SkPaint* paint); 178 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 179 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 180 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 181 float left, float top, float right, float bottom, const SkPaint* paint); 182 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 183 float left, float top, float right, float bottom, const SkPaint* paint); 184 virtual status_t drawColor(int color, SkXfermode::Mode mode); 185 virtual status_t drawRect(float left, float top, float right, float bottom, 186 const SkPaint* paint); 187 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 188 float rx, float ry, const SkPaint* paint); 189 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 190 virtual status_t drawOval(float left, float top, float right, float bottom, 191 const SkPaint* paint); 192 virtual status_t drawArc(float left, float top, float right, float bottom, 193 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 194 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 195 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 196 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 197 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 198 float hOffset, float vOffset, const SkPaint* paint); 199 virtual status_t drawPosText(const char* text, int bytesCount, int count, 200 const float* positions, const SkPaint* paint); 201 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 202 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 203 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 204 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 205 206 status_t drawShadow(float casterAlpha, 207 const VertexBuffer* ambientShadowVertexBuffer, const VertexBuffer* spotShadowVertexBuffer); 208 209 virtual void resetPaintFilter(); 210 virtual void setupPaintFilter(int clearBits, int setBits); 211 212 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 213 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 214 215 const SkPaint* filterPaint(const SkPaint* paint); 216 217 /** 218 * Store the current display state (most importantly, the current clip and transform), and 219 * additionally map the state's bounds from local to window coordinates. 220 * 221 * Returns true if quick-rejected 222 */ 223 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 224 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 225 void setupMergedMultiDraw(const Rect* clipRect); 226 227 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 228 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 229 230 bool isCurrentTransformSimple() { 231 return currentTransform()->isSimple(); 232 } 233 234 Caches& getCaches() { 235 return mCaches; 236 } 237 238 // simple rect clip 239 bool isCurrentClipSimple() { 240 return mSnapshot->clipRegion->isEmpty(); 241 } 242 243 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 244 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 245 246 /** 247 * Scales the alpha on the current snapshot. This alpha value will be modulated 248 * with other alpha values when drawing primitives. 249 */ 250 void scaleAlpha(float alpha) { 251 mSnapshot->alpha *= alpha; 252 } 253 254 /** 255 * Inserts a named event marker in the stream of GL commands. 256 */ 257 void eventMark(const char* name) const; 258 259 /** 260 * Inserts a formatted event marker in the stream of GL commands. 261 */ 262 void eventMarkDEBUG(const char *fmt, ...) const; 263 264 /** 265 * Inserts a named group marker in the stream of GL commands. This marker 266 * can be used by tools to group commands into logical groups. A call to 267 * this method must always be followed later on by a call to endMark(). 268 */ 269 void startMark(const char* name) const; 270 271 /** 272 * Closes the last group marker opened by startMark(). 273 */ 274 void endMark() const; 275 276 /** 277 * Gets the alpha and xfermode out of a paint object. If the paint is null 278 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 279 * not multiply the paint's alpha by the current snapshot's alpha, and does 280 * not replace the alpha with the overrideLayerAlpha 281 * 282 * @param paint The paint to extract values from 283 * @param alpha Where to store the resulting alpha 284 * @param mode Where to store the resulting xfermode 285 */ 286 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 287 *mode = getXfermodeDirect(paint); 288 *alpha = getAlphaDirect(paint); 289 } 290 291 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 292 if (!paint) return SkXfermode::kSrcOver_Mode; 293 return getXfermode(paint->getXfermode()); 294 } 295 296 static inline int getAlphaDirect(const SkPaint* paint) { 297 if (!paint) return 255; 298 return paint->getAlpha(); 299 } 300 301 struct TextShadow { 302 SkScalar radius; 303 float dx; 304 float dy; 305 SkColor color; 306 }; 307 308 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 309 SkDrawLooper::BlurShadowRec blur; 310 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 311 if (textShadow) { 312 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 313 textShadow->dx = blur.fOffset.fX; 314 textShadow->dy = blur.fOffset.fY; 315 textShadow->color = blur.fColor; 316 } 317 return true; 318 } 319 return false; 320 } 321 322 static inline bool hasTextShadow(const SkPaint* paint) { 323 return getTextShadow(paint, NULL); 324 } 325 326 /** 327 * Build the best transform to use to rasterize text given a full 328 * transform matrix, and whether filteration is needed. 329 * 330 * Returns whether filtration is needed 331 */ 332 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 333 334#if DEBUG_MERGE_BEHAVIOR 335 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 336 mCaches.setScissorEnabled(false); 337 338 // should only be called outside of other draw ops, so stencil can only be in test state 339 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 340 mCaches.stencil.disable(); 341 342 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 343 344 if (stencilWasEnabled) mCaches.stencil.enableTest(); 345 } 346#endif 347 348 const Vector3& getLightCenter() const { return currentSnapshot()->getRelativeLightCenter(); } 349 float getLightRadius() const { return mLightRadius; } 350 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 351 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 352 353protected: 354 /** 355 * Perform the setup specific to a frame. This method does not 356 * issue any OpenGL commands. 357 */ 358 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 359 360 /** 361 * Indicates the start of rendering. This method will setup the 362 * initial OpenGL state (viewport, clearing the buffer, etc.) 363 */ 364 status_t startFrame(); 365 366 /** 367 * Clears the underlying surface if needed. 368 */ 369 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 370 371 /** 372 * Call this method after updating a layer during a drawing pass. 373 */ 374 void resumeAfterLayer(); 375 376 /** 377 * This method is called whenever a stencil buffer is required. Subclasses 378 * should override this method and call attachStencilBufferToLayer() on the 379 * appropriate layer(s). 380 */ 381 virtual void ensureStencilBuffer(); 382 383 /** 384 * Obtains a stencil render buffer (allocating it if necessary) and 385 * attaches it to the specified layer. 386 */ 387 void attachStencilBufferToLayer(Layer* layer); 388 389 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 390 const SkPaint* paint = NULL); 391 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 392 return quickRejectSetupScissor(bounds.left, bounds.top, 393 bounds.right, bounds.bottom, paint); 394 } 395 396 /** 397 * Compose the layer defined in the current snapshot with the layer 398 * defined by the previous snapshot. 399 * 400 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 401 * 402 * @param curent The current snapshot containing the layer to compose 403 * @param previous The previous snapshot to compose the current layer with 404 */ 405 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 406 407 /** 408 * Marks the specified region as dirty at the specified bounds. 409 */ 410 void dirtyLayerUnchecked(Rect& bounds, Region* region); 411 412 /** 413 * Returns the region of the current layer. 414 */ 415 virtual Region* getRegion() const { 416 return mSnapshot->region; 417 } 418 419 /** 420 * Indicates whether rendering is currently targeted at a layer. 421 */ 422 virtual bool hasLayer() const { 423 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 424 } 425 426 /** 427 * Returns the name of the FBO this renderer is rendering into. 428 */ 429 virtual GLuint getTargetFbo() const { 430 return 0; 431 } 432 433 /** 434 * Renders the specified layer as a textured quad. 435 * 436 * @param layer The layer to render 437 * @param rect The bounds of the layer 438 */ 439 void drawTextureLayer(Layer* layer, const Rect& rect); 440 441 /** 442 * Gets the alpha and xfermode out of a paint object. If the paint is null 443 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 444 * snapshot alpha, and overrideLayerAlpha 445 * 446 * @param paint The paint to extract values from 447 * @param alpha Where to store the resulting alpha 448 * @param mode Where to store the resulting xfermode 449 */ 450 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 451 452 /** 453 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 454 * 455 * @param layer The layer from which the alpha is extracted 456 */ 457 inline float getLayerAlpha(const Layer* layer) const; 458 459 /** 460 * Safely retrieves the ColorFilter from the given Paint. If the paint is 461 * null then null is returned. 462 */ 463 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 464 return paint ? paint->getColorFilter() : NULL; 465 } 466 467 /** 468 * Safely retrieves the Shader from the given Paint. If the paint is 469 * null then null is returned. 470 */ 471 static inline const SkShader* getShader(const SkPaint* paint) { 472 return paint ? paint->getShader() : NULL; 473 } 474 475 /** 476 * Set to true to suppress error checks at the end of a frame. 477 */ 478 virtual bool suppressErrorChecks() const { 479 return false; 480 } 481 482 inline RenderState& renderState() { return mRenderState; } 483 484private: 485 /** 486 * Discards the content of the framebuffer if supported by the driver. 487 * This method should be called at the beginning of a frame to optimize 488 * rendering on some tiler architectures. 489 */ 490 void discardFramebuffer(float left, float top, float right, float bottom); 491 492 /** 493 * Ensures the state of the renderer is the same as the state of 494 * the GL context. 495 */ 496 void syncState(); 497 498 /** 499 * Tells the GPU what part of the screen is about to be redrawn. 500 * This method will use the current layer space clip rect. 501 * This method needs to be invoked every time getTargetFbo() is 502 * bound again. 503 */ 504 void startTilingCurrentClip(bool opaque = false, bool expand = false); 505 506 /** 507 * Tells the GPU what part of the screen is about to be redrawn. 508 * This method needs to be invoked every time getTargetFbo() is 509 * bound again. 510 */ 511 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 512 513 /** 514 * Tells the GPU that we are done drawing the frame or that we 515 * are switching to another render target. 516 */ 517 void endTiling(); 518 519 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 520 521 /** 522 * Sets the clipping rectangle using glScissor. The clip is defined by 523 * the current snapshot's clipRect member. 524 */ 525 void setScissorFromClip(); 526 527 /** 528 * Sets the clipping region using the stencil buffer. The clip region 529 * is defined by the current snapshot's clipRegion member. 530 */ 531 void setStencilFromClip(); 532 533 /** 534 * Given the local bounds of the layer, calculates ... 535 */ 536 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 537 538 /** 539 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 540 */ 541 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 542 bool fboLayer, int alpha); 543 544 /** 545 * Creates a new layer stored in the specified snapshot. 546 * 547 * @param snapshot The snapshot associated with the new layer 548 * @param left The left coordinate of the layer 549 * @param top The top coordinate of the layer 550 * @param right The right coordinate of the layer 551 * @param bottom The bottom coordinate of the layer 552 * @param alpha The translucency of the layer 553 * @param mode The blending mode of the layer 554 * @param flags The layer save flags 555 * @param mask A mask to use when drawing the layer back, may be empty 556 * 557 * @return True if the layer was successfully created, false otherwise 558 */ 559 bool createLayer(float left, float top, float right, float bottom, 560 const SkPaint* paint, int flags, const SkPath* convexMask); 561 562 /** 563 * Creates a new layer stored in the specified snapshot as an FBO. 564 * 565 * @param layer The layer to store as an FBO 566 * @param snapshot The snapshot associated with the new layer 567 * @param bounds The bounds of the layer 568 */ 569 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 570 571 /** 572 * Compose the specified layer as a region. 573 * 574 * @param layer The layer to compose 575 * @param rect The layer's bounds 576 */ 577 void composeLayerRegion(Layer* layer, const Rect& rect); 578 579 /** 580 * Compose the specified layer as a simple rectangle. 581 * 582 * @param layer The layer to compose 583 * @param rect The layer's bounds 584 * @param swap If true, the source and destination are swapped 585 */ 586 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 587 588 /** 589 * Clears all the regions corresponding to the current list of layers. 590 * This method MUST be invoked before any drawing operation. 591 */ 592 void clearLayerRegions(); 593 594 /** 595 * Mark the layer as dirty at the specified coordinates. The coordinates 596 * are transformed with the supplied matrix. 597 */ 598 void dirtyLayer(const float left, const float top, 599 const float right, const float bottom, const mat4 transform); 600 601 /** 602 * Mark the layer as dirty at the specified coordinates. 603 */ 604 void dirtyLayer(const float left, const float top, 605 const float right, const float bottom); 606 607 /** 608 * Draws a colored rectangle with the specified color. The specified coordinates 609 * are transformed by the current snapshot's transform matrix unless specified 610 * otherwise. 611 * 612 * @param left The left coordinate of the rectangle 613 * @param top The top coordinate of the rectangle 614 * @param right The right coordinate of the rectangle 615 * @param bottom The bottom coordinate of the rectangle 616 * @param paint The paint containing the color, blending mode, etc. 617 * @param ignoreTransform True if the current transform should be ignored 618 */ 619 void drawColorRect(float left, float top, float right, float bottom, 620 const SkPaint* paint, bool ignoreTransform = false); 621 622 /** 623 * Draws a series of colored rectangles with the specified color. The specified 624 * coordinates are transformed by the current snapshot's transform matrix unless 625 * specified otherwise. 626 * 627 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 628 * per rectangle 629 * @param paint The paint containing the color, blending mode, etc. 630 * @param ignoreTransform True if the current transform should be ignored 631 * @param dirty True if calling this method should dirty the current layer 632 * @param clip True if the rects should be clipped, false otherwise 633 */ 634 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 635 bool ignoreTransform = false, bool dirty = true, bool clip = true); 636 637 /** 638 * Draws the shape represented by the specified path texture. 639 * This method invokes drawPathTexture() but takes into account 640 * the extra left/top offset and the texture offset to correctly 641 * position the final shape. 642 * 643 * @param left The left coordinate of the shape to render 644 * @param top The top coordinate of the shape to render 645 * @param texture The texture reprsenting the shape 646 * @param paint The paint to draw the shape with 647 */ 648 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 649 650 /** 651 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 652 * different compositing rules. 653 * 654 * @param texture The texture to draw with 655 * @param left The x coordinate of the bitmap 656 * @param top The y coordinate of the bitmap 657 * @param paint The paint to render with 658 */ 659 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 660 661 /** 662 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 663 * 664 * @param vertexBuffer The VertexBuffer to be drawn 665 * @param paint The paint to render with 666 * @param flags flags with which to draw 667 */ 668 status_t drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 669 const SkPaint* paint, int flags = 0); 670 671 /** 672 * Convenience for translating method 673 */ 674 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, 675 const SkPaint* paint, int flags = 0) { 676 return drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 677 } 678 679 /** 680 * Renders the convex hull defined by the specified path as a strip of polygons. 681 * 682 * @param path The hull of the path to draw 683 * @param paint The paint to render with 684 */ 685 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 686 687 /** 688 * Draws a textured rectangle with the specified texture. The specified coordinates 689 * are transformed by the current snapshot's transform matrix. 690 * 691 * @param left The left coordinate of the rectangle 692 * @param top The top coordinate of the rectangle 693 * @param right The right coordinate of the rectangle 694 * @param bottom The bottom coordinate of the rectangle 695 * @param texture The texture to use 696 * @param paint The paint containing the alpha, blending mode, etc. 697 */ 698 void drawTextureRect(float left, float top, float right, float bottom, 699 Texture* texture, const SkPaint* paint); 700 701 /** 702 * Draws a textured mesh with the specified texture. If the indices are omitted, 703 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 704 * VBO is bound. 705 * 706 * @param left The left coordinate of the rectangle 707 * @param top The top coordinate of the rectangle 708 * @param right The right coordinate of the rectangle 709 * @param bottom The bottom coordinate of the rectangle 710 * @param texture The texture name to map onto the rectangle 711 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 712 * @param blend True if the texture contains an alpha channel 713 * @param vertices The vertices that define the mesh 714 * @param texCoords The texture coordinates of each vertex 715 * @param elementsCount The number of elements in the mesh, required by indices 716 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 717 * @param ignoreTransform True if the current transform should be ignored 718 * @param vbo The VBO used to draw the mesh 719 * @param modelViewMode Defines whether the model view matrix should be scaled 720 * @param dirty True if calling this method should dirty the current layer 721 */ 722 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 723 const SkPaint* paint, bool blend, 724 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 725 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 726 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 727 728 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 729 const SkPaint* paint, bool blend, 730 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 731 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 732 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 733 734 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 735 GLuint texture, const SkPaint* paint, 736 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 737 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 738 bool dirty = true); 739 740 /** 741 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 742 * If the number of vertices to draw exceeds the number of indices we have 743 * pre-allocated, this method will generate several glDrawElements() calls. 744 */ 745 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 746 747 /** 748 * Draws text underline and strike-through if needed. 749 * 750 * @param text The text to decor 751 * @param bytesCount The number of bytes in the text 752 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 753 * @param x The x coordinate where the text will be drawn 754 * @param y The y coordinate where the text will be drawn 755 * @param paint The paint to draw the text with 756 */ 757 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 758 759 /** 760 * Draws shadow layer on text (with optional positions). 761 * 762 * @param paint The paint to draw the shadow with 763 * @param text The text to draw 764 * @param bytesCount The number of bytes in the text 765 * @param count The number of glyphs in the text 766 * @param positions The x, y positions of individual glyphs (or NULL) 767 * @param fontRenderer The font renderer object 768 * @param alpha The alpha value for drawing the shadow 769 * @param x The x coordinate where the shadow will be drawn 770 * @param y The y coordinate where the shadow will be drawn 771 */ 772 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 773 const float* positions, FontRenderer& fontRenderer, int alpha, 774 float x, float y); 775 776 /** 777 * Draws a path texture. Path textures are alpha8 bitmaps that need special 778 * compositing to apply colors/filters/etc. 779 * 780 * @param texture The texture to render 781 * @param x The x coordinate where the texture will be drawn 782 * @param y The y coordinate where the texture will be drawn 783 * @param paint The paint to draw the texture with 784 */ 785 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 786 787 /** 788 * Resets the texture coordinates stored in mMeshVertices. Setting the values 789 * back to default is achieved by calling: 790 * 791 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 792 * 793 * @param u1 The left coordinate of the texture 794 * @param v1 The bottom coordinate of the texture 795 * @param u2 The right coordinate of the texture 796 * @param v2 The top coordinate of the texture 797 */ 798 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 799 800 /** 801 * Returns true if the specified paint will draw invisible text. 802 */ 803 bool canSkipText(const SkPaint* paint) const; 804 805 /** 806 * Binds the specified texture. The texture unit must have been selected 807 * prior to calling this method. 808 */ 809 inline void bindTexture(GLuint texture) { 810 mCaches.bindTexture(texture); 811 } 812 813 /** 814 * Binds the specified EGLImage texture. The texture unit must have been selected 815 * prior to calling this method. 816 */ 817 inline void bindExternalTexture(GLuint texture) { 818 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 819 } 820 821 /** 822 * Enable or disable blending as necessary. This function sets the appropriate 823 * blend function based on the specified xfermode. 824 */ 825 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 826 bool swapSrcDst = false); 827 828 /** 829 * Use the specified program with the current GL context. If the program is already 830 * in use, it will not be bound again. If it is not in use, the current program is 831 * marked unused and the specified program becomes used and becomes the new 832 * current program. 833 * 834 * @param program The program to use 835 * 836 * @return true If the specified program was already in use, false otherwise. 837 */ 838 inline bool useProgram(Program* program); 839 840 /** 841 * Invoked before any drawing operation. This sets required state. 842 */ 843 void setupDraw(bool clear = true); 844 845 /** 846 * Various methods to setup OpenGL rendering. 847 */ 848 void setupDrawWithTexture(bool isAlpha8 = false); 849 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 850 void setupDrawWithExternalTexture(); 851 void setupDrawNoTexture(); 852 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 853 void setupDrawColor(int color, int alpha); 854 void setupDrawColor(float r, float g, float b, float a); 855 void setupDrawAlpha8Color(int color, int alpha); 856 void setupDrawTextGamma(const SkPaint* paint); 857 void setupDrawShader(const SkShader* shader); 858 void setupDrawColorFilter(const SkColorFilter* filter); 859 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 860 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 861 void setupDrawProgram(); 862 void setupDrawDirtyRegionsDisabled(); 863 864 /** 865 * Setup the current program matrices based upon the nature of the geometry. 866 * 867 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 868 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 869 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 870 * transformations are stored in the modelView matrix and uploaded to the shader. 871 * 872 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 873 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 874 * 875 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 876 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 877 * or when simple translation has been extracted) 878 */ 879 void setupDrawModelView(ModelViewMode mode, bool offset, 880 float left, float top, float right, float bottom, bool ignoreTransform = false); 881 void setupDrawColorUniforms(bool hasShader); 882 void setupDrawPureColorUniforms(); 883 884 /** 885 * Setup uniforms for the current shader. 886 * 887 * @param shader SkShader on the current paint. 888 * 889 * @param ignoreTransform Set to true to ignore the transform in shader. 890 */ 891 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 892 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 893 void setupDrawSimpleMesh(); 894 void setupDrawTexture(GLuint texture); 895 void setupDrawExternalTexture(GLuint texture); 896 void setupDrawTextureTransform(); 897 void setupDrawTextureTransformUniforms(mat4& transform); 898 void setupDrawTextGammaUniforms(); 899 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 900 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 901 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 902 void setupDrawIndexedVertices(GLvoid* vertices); 903 void accountForClear(SkXfermode::Mode mode); 904 905 bool updateLayer(Layer* layer, bool inFrame); 906 void updateLayers(); 907 void flushLayers(); 908 909#if DEBUG_LAYERS_AS_REGIONS 910 /** 911 * Renders the specified region as a series of rectangles. This method 912 * is used for debugging only. 913 */ 914 void drawRegionRectsDebug(const Region& region); 915#endif 916 917 /** 918 * Renders the specified region as a series of rectangles. The region 919 * must be in screen-space coordinates. 920 */ 921 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 922 923 /** 924 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 925 * is turned on. 926 */ 927 void debugClip(); 928 929 void debugOverdraw(bool enable, bool clear); 930 void renderOverdraw(); 931 void countOverdraw(); 932 933 /** 934 * Should be invoked every time the glScissor is modified. 935 */ 936 inline void dirtyClip() { 937 mDirtyClip = true; 938 } 939 940 inline const UvMapper& getMapper(const Texture* texture) { 941 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 942 } 943 944 /** 945 * Returns a texture object for the specified bitmap. The texture can 946 * come from the texture cache or an atlas. If this method returns 947 * NULL, the texture could not be found and/or allocated. 948 */ 949 Texture* getTexture(const SkBitmap* bitmap); 950 951 /** 952 * Model-view matrix used to position/size objects 953 * 954 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 955 * currentTransform(). 956 * 957 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 958 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 959 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 960 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 961 * of a bitmap. 962 * 963 * Used as input to SkiaShader transformation. 964 */ 965 mat4 mModelViewMatrix; 966 967 // State used to define the clipping region 968 Rect mTilingClip; 969 // Is the target render surface opaque 970 bool mOpaque; 971 // Is a frame currently being rendered 972 bool mFrameStarted; 973 974 // Used to draw textured quads 975 TextureVertex mMeshVertices[4]; 976 977 // Default UV mapper 978 const UvMapper mUvMapper; 979 980 // shader, filters, and shadow 981 DrawModifiers mDrawModifiers; 982 SkPaint mFilteredPaint; 983 984 // Various caches 985 Caches& mCaches; 986 Extensions& mExtensions; 987 RenderState& mRenderState; 988 989 // List of rectangles to clear after saveLayer() is invoked 990 Vector<Rect*> mLayers; 991 // List of layers to update at the beginning of a frame 992 Vector<Layer*> mLayerUpdates; 993 994 // The following fields are used to setup drawing 995 // Used to describe the shaders to generate 996 ProgramDescription mDescription; 997 // Color description 998 bool mColorSet; 999 float mColorA, mColorR, mColorG, mColorB; 1000 // Indicates that the shader should get a color 1001 bool mSetShaderColor; 1002 // Current texture unit 1003 GLuint mTextureUnit; 1004 // Track dirty regions, true by default 1005 bool mTrackDirtyRegions; 1006 // Indicate whether we are drawing an opaque frame 1007 bool mOpaqueFrame; 1008 1009 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1010 // Properties.h 1011 bool mScissorOptimizationDisabled; 1012 1013 // No-ops start/endTiling when set 1014 bool mSuppressTiling; 1015 1016 // If true, this renderer will setup drawing to emulate 1017 // an increment stencil buffer in the color buffer 1018 bool mCountOverdraw; 1019 float mOverdraw; 1020 1021 bool mSkipOutlineClip; 1022 1023 // Lighting + shadows 1024 Vector3 mLightCenter; 1025 float mLightRadius; 1026 uint8_t mAmbientShadowAlpha; 1027 uint8_t mSpotShadowAlpha; 1028 1029 friend class Layer; 1030 friend class TextSetupFunctor; 1031 friend class DrawBitmapOp; 1032 friend class DrawPatchOp; 1033 1034}; // class OpenGLRenderer 1035 1036}; // namespace uirenderer 1037}; // namespace android 1038 1039#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1040