OpenGLRenderer.h revision 59744b79ec302000802cd56d30a1bf70f0183c80
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(); 127 128 virtual void onViewportInitialized(); 129 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 130 virtual void finish(); 131 132 void setCountOverdrawEnabled(bool enabled) { 133 mCountOverdraw = enabled; 134 } 135 136 float getOverdraw() { 137 return mCountOverdraw ? mOverdraw : 0.0f; 138 } 139 140 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 141 142 void pushLayerUpdate(Layer* layer); 143 void cancelLayerUpdate(Layer* layer); 144 void clearLayerUpdates(); 145 void flushLayerUpdates(); 146 147 virtual int saveLayer(float left, float top, float right, float bottom, 148 const SkPaint* paint, int flags) { 149 return saveLayer(left, top, right, bottom, paint, flags, NULL); 150 } 151 152 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 153 // created, which will in turn clip to that mask when drawn back/restored. 154 int saveLayer(float left, float top, float right, float bottom, 155 const SkPaint* paint, int flags, const SkPath* convexMask); 156 157 int saveLayerDeferred(float left, float top, float right, float bottom, 158 const SkPaint* paint, int flags); 159 160 virtual status_t drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 161 virtual status_t drawLayer(Layer* layer, float x, float y); 162 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 163 const SkPaint* paint); 164 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 165 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 166 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix& matrix, 167 const SkPaint* paint); 168 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 169 float srcRight, float srcBottom, float dstLeft, float dstTop, 170 float dstRight, float dstBottom, const SkPaint* paint); 171 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 172 const SkPaint* paint); 173 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 174 const float* vertices, const int* colors, const SkPaint* paint); 175 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 176 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 177 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 178 float left, float top, float right, float bottom, const SkPaint* paint); 179 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 180 float left, float top, float right, float bottom, const SkPaint* paint); 181 virtual status_t drawColor(int color, SkXfermode::Mode mode); 182 virtual status_t drawRect(float left, float top, float right, float bottom, 183 const SkPaint* paint); 184 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 185 float rx, float ry, const SkPaint* paint); 186 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 187 virtual status_t drawOval(float left, float top, float right, float bottom, 188 const SkPaint* paint); 189 virtual status_t drawArc(float left, float top, float right, float bottom, 190 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 191 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 192 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 193 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 194 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 195 float hOffset, float vOffset, const SkPaint* paint); 196 virtual status_t drawPosText(const char* text, int bytesCount, int count, 197 const float* positions, const SkPaint* paint); 198 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 199 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 200 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 201 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 202 203 status_t drawShadow(float casterAlpha, 204 const VertexBuffer* ambientShadowVertexBuffer, const VertexBuffer* spotShadowVertexBuffer); 205 206 virtual void resetPaintFilter(); 207 virtual void setupPaintFilter(int clearBits, int setBits); 208 209 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 210 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 211 212 const SkPaint* filterPaint(const SkPaint* paint); 213 214 /** 215 * Store the current display state (most importantly, the current clip and transform), and 216 * additionally map the state's bounds from local to window coordinates. 217 * 218 * Returns true if quick-rejected 219 */ 220 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 221 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 222 void setupMergedMultiDraw(const Rect* clipRect); 223 224 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 225 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 226 227 bool isCurrentTransformSimple() { 228 return currentTransform()->isSimple(); 229 } 230 231 Caches& getCaches() { 232 return mCaches; 233 } 234 235 // simple rect clip 236 bool isCurrentClipSimple() { 237 return mSnapshot->clipRegion->isEmpty(); 238 } 239 240 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 241 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 242 243 /** 244 * Scales the alpha on the current snapshot. This alpha value will be modulated 245 * with other alpha values when drawing primitives. 246 */ 247 void scaleAlpha(float alpha) { 248 mSnapshot->alpha *= alpha; 249 } 250 251 /** 252 * Inserts a named event marker in the stream of GL commands. 253 */ 254 void eventMark(const char* name) const; 255 256 /** 257 * Inserts a named group marker in the stream of GL commands. This marker 258 * can be used by tools to group commands into logical groups. A call to 259 * this method must always be followed later on by a call to endMark(). 260 */ 261 void startMark(const char* name) const; 262 263 /** 264 * Closes the last group marker opened by startMark(). 265 */ 266 void endMark() const; 267 268 /** 269 * Gets the alpha and xfermode out of a paint object. If the paint is null 270 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 271 * not multiply the paint's alpha by the current snapshot's alpha, and does 272 * not replace the alpha with the overrideLayerAlpha 273 * 274 * @param paint The paint to extract values from 275 * @param alpha Where to store the resulting alpha 276 * @param mode Where to store the resulting xfermode 277 */ 278 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 279 *mode = getXfermodeDirect(paint); 280 *alpha = getAlphaDirect(paint); 281 } 282 283 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 284 if (!paint) return SkXfermode::kSrcOver_Mode; 285 return getXfermode(paint->getXfermode()); 286 } 287 288 static inline int getAlphaDirect(const SkPaint* paint) { 289 if (!paint) return 255; 290 return paint->getAlpha(); 291 } 292 293 struct TextShadow { 294 SkScalar radius; 295 float dx; 296 float dy; 297 SkColor color; 298 }; 299 300 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 301 SkDrawLooper::BlurShadowRec blur; 302 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 303 if (textShadow) { 304 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 305 textShadow->dx = blur.fOffset.fX; 306 textShadow->dy = blur.fOffset.fY; 307 textShadow->color = blur.fColor; 308 } 309 return true; 310 } 311 return false; 312 } 313 314 static inline bool hasTextShadow(const SkPaint* paint) { 315 return getTextShadow(paint, NULL); 316 } 317 318 /** 319 * Build the best transform to use to rasterize text given a full 320 * transform matrix, and whether filteration is needed. 321 * 322 * Returns whether filtration is needed 323 */ 324 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 325 326#if DEBUG_MERGE_BEHAVIOR 327 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 328 mCaches.setScissorEnabled(false); 329 330 // should only be called outside of other draw ops, so stencil can only be in test state 331 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 332 mCaches.stencil.disable(); 333 334 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 335 336 if (stencilWasEnabled) mCaches.stencil.enableTest(); 337 } 338#endif 339 340 const Vector3& getLightCenter() const { return mLightCenter; } 341 float getLightRadius() const { return mLightRadius; } 342 343protected: 344 /** 345 * Perform the setup specific to a frame. This method does not 346 * issue any OpenGL commands. 347 */ 348 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 349 350 /** 351 * Indicates the start of rendering. This method will setup the 352 * initial OpenGL state (viewport, clearing the buffer, etc.) 353 */ 354 status_t startFrame(); 355 356 /** 357 * Clears the underlying surface if needed. 358 */ 359 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 360 361 /** 362 * Call this method after updating a layer during a drawing pass. 363 */ 364 void resumeAfterLayer(); 365 366 /** 367 * This method is called whenever a stencil buffer is required. Subclasses 368 * should override this method and call attachStencilBufferToLayer() on the 369 * appropriate layer(s). 370 */ 371 virtual void ensureStencilBuffer(); 372 373 /** 374 * Obtains a stencil render buffer (allocating it if necessary) and 375 * attaches it to the specified layer. 376 */ 377 void attachStencilBufferToLayer(Layer* layer); 378 379 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 380 const SkPaint* paint = NULL); 381 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 382 return quickRejectSetupScissor(bounds.left, bounds.top, 383 bounds.right, bounds.bottom, paint); 384 } 385 386 /** 387 * Compose the layer defined in the current snapshot with the layer 388 * defined by the previous snapshot. 389 * 390 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 391 * 392 * @param curent The current snapshot containing the layer to compose 393 * @param previous The previous snapshot to compose the current layer with 394 */ 395 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 396 397 /** 398 * Marks the specified region as dirty at the specified bounds. 399 */ 400 void dirtyLayerUnchecked(Rect& bounds, Region* region); 401 402 /** 403 * Returns the region of the current layer. 404 */ 405 virtual Region* getRegion() const { 406 return mSnapshot->region; 407 } 408 409 /** 410 * Indicates whether rendering is currently targeted at a layer. 411 */ 412 virtual bool hasLayer() const { 413 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 414 } 415 416 /** 417 * Returns the name of the FBO this renderer is rendering into. 418 */ 419 virtual GLuint getTargetFbo() const { 420 return 0; 421 } 422 423 /** 424 * Renders the specified layer as a textured quad. 425 * 426 * @param layer The layer to render 427 * @param rect The bounds of the layer 428 */ 429 void drawTextureLayer(Layer* layer, const Rect& rect); 430 431 /** 432 * Gets the alpha and xfermode out of a paint object. If the paint is null 433 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 434 * snapshot alpha, and overrideLayerAlpha 435 * 436 * @param paint The paint to extract values from 437 * @param alpha Where to store the resulting alpha 438 * @param mode Where to store the resulting xfermode 439 */ 440 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 441 442 /** 443 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 444 * 445 * @param layer The layer from which the alpha is extracted 446 */ 447 inline float getLayerAlpha(const Layer* layer) const; 448 449 /** 450 * Safely retrieves the ColorFilter from the given Paint. If the paint is 451 * null then null is returned. 452 */ 453 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 454 return paint ? paint->getColorFilter() : NULL; 455 } 456 457 /** 458 * Safely retrieves the Shader from the given Paint. If the paint is 459 * null then null is returned. 460 */ 461 static inline const SkShader* getShader(const SkPaint* paint) { 462 return paint ? paint->getShader() : NULL; 463 } 464 465 /** 466 * Set to true to suppress error checks at the end of a frame. 467 */ 468 virtual bool suppressErrorChecks() const { 469 return false; 470 } 471 472 inline RenderState& renderState() { return mRenderState; } 473 474private: 475 /** 476 * Discards the content of the framebuffer if supported by the driver. 477 * This method should be called at the beginning of a frame to optimize 478 * rendering on some tiler architectures. 479 */ 480 void discardFramebuffer(float left, float top, float right, float bottom); 481 482 /** 483 * Ensures the state of the renderer is the same as the state of 484 * the GL context. 485 */ 486 void syncState(); 487 488 /** 489 * Tells the GPU what part of the screen is about to be redrawn. 490 * This method will use the current layer space clip rect. 491 * This method needs to be invoked every time getTargetFbo() is 492 * bound again. 493 */ 494 void startTilingCurrentClip(bool opaque = false); 495 496 /** 497 * Tells the GPU what part of the screen is about to be redrawn. 498 * This method needs to be invoked every time getTargetFbo() is 499 * bound again. 500 */ 501 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 502 503 /** 504 * Tells the GPU that we are done drawing the frame or that we 505 * are switching to another render target. 506 */ 507 void endTiling(); 508 509 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 510 511 /** 512 * Sets the clipping rectangle using glScissor. The clip is defined by 513 * the current snapshot's clipRect member. 514 */ 515 void setScissorFromClip(); 516 517 /** 518 * Sets the clipping region using the stencil buffer. The clip region 519 * is defined by the current snapshot's clipRegion member. 520 */ 521 void setStencilFromClip(); 522 523 /** 524 * Given the local bounds of the layer, calculates ... 525 */ 526 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 527 528 /** 529 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 530 */ 531 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 532 bool fboLayer, int alpha); 533 534 /** 535 * Creates a new layer stored in the specified snapshot. 536 * 537 * @param snapshot The snapshot associated with the new layer 538 * @param left The left coordinate of the layer 539 * @param top The top coordinate of the layer 540 * @param right The right coordinate of the layer 541 * @param bottom The bottom coordinate of the layer 542 * @param alpha The translucency of the layer 543 * @param mode The blending mode of the layer 544 * @param flags The layer save flags 545 * @param mask A mask to use when drawing the layer back, may be empty 546 * 547 * @return True if the layer was successfully created, false otherwise 548 */ 549 bool createLayer(float left, float top, float right, float bottom, 550 const SkPaint* paint, int flags, const SkPath* convexMask); 551 552 /** 553 * Creates a new layer stored in the specified snapshot as an FBO. 554 * 555 * @param layer The layer to store as an FBO 556 * @param snapshot The snapshot associated with the new layer 557 * @param bounds The bounds of the layer 558 */ 559 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 560 561 /** 562 * Compose the specified layer as a region. 563 * 564 * @param layer The layer to compose 565 * @param rect The layer's bounds 566 */ 567 void composeLayerRegion(Layer* layer, const Rect& rect); 568 569 /** 570 * Compose the specified layer as a simple rectangle. 571 * 572 * @param layer The layer to compose 573 * @param rect The layer's bounds 574 * @param swap If true, the source and destination are swapped 575 */ 576 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 577 578 /** 579 * Clears all the regions corresponding to the current list of layers. 580 * This method MUST be invoked before any drawing operation. 581 */ 582 void clearLayerRegions(); 583 584 /** 585 * Mark the layer as dirty at the specified coordinates. The coordinates 586 * are transformed with the supplied matrix. 587 */ 588 void dirtyLayer(const float left, const float top, 589 const float right, const float bottom, const mat4 transform); 590 591 /** 592 * Mark the layer as dirty at the specified coordinates. 593 */ 594 void dirtyLayer(const float left, const float top, 595 const float right, const float bottom); 596 597 /** 598 * Draws a colored rectangle with the specified color. The specified coordinates 599 * are transformed by the current snapshot's transform matrix unless specified 600 * otherwise. 601 * 602 * @param left The left coordinate of the rectangle 603 * @param top The top coordinate of the rectangle 604 * @param right The right coordinate of the rectangle 605 * @param bottom The bottom coordinate of the rectangle 606 * @param paint The paint containing the color, blending mode, etc. 607 * @param ignoreTransform True if the current transform should be ignored 608 */ 609 void drawColorRect(float left, float top, float right, float bottom, 610 const SkPaint* paint, bool ignoreTransform = false); 611 612 /** 613 * Draws a series of colored rectangles with the specified color. The specified 614 * coordinates are transformed by the current snapshot's transform matrix unless 615 * specified otherwise. 616 * 617 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 618 * per rectangle 619 * @param paint The paint containing the color, blending mode, etc. 620 * @param ignoreTransform True if the current transform should be ignored 621 * @param dirty True if calling this method should dirty the current layer 622 * @param clip True if the rects should be clipped, false otherwise 623 */ 624 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 625 bool ignoreTransform = false, bool dirty = true, bool clip = true); 626 627 /** 628 * Draws the shape represented by the specified path texture. 629 * This method invokes drawPathTexture() but takes into account 630 * the extra left/top offset and the texture offset to correctly 631 * position the final shape. 632 * 633 * @param left The left coordinate of the shape to render 634 * @param top The top coordinate of the shape to render 635 * @param texture The texture reprsenting the shape 636 * @param paint The paint to draw the shape with 637 */ 638 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 639 640 /** 641 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 642 * different compositing rules. 643 * 644 * @param texture The texture to draw with 645 * @param left The x coordinate of the bitmap 646 * @param top The y coordinate of the bitmap 647 * @param paint The paint to render with 648 */ 649 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 650 651 /** 652 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 653 * 654 * @param vertexBuffer The VertexBuffer to be drawn 655 * @param paint The paint to render with 656 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 657 */ 658 status_t drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 659 const SkPaint* paint, bool useOffset = false); 660 661 /** 662 * Convenience for translating method 663 */ 664 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, 665 const SkPaint* paint, bool useOffset = false) { 666 return drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, useOffset); 667 } 668 669 /** 670 * Renders the convex hull defined by the specified path as a strip of polygons. 671 * 672 * @param path The hull of the path to draw 673 * @param paint The paint to render with 674 */ 675 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 676 677 /** 678 * Draws a textured rectangle with the specified texture. The specified coordinates 679 * are transformed by the current snapshot's transform matrix. 680 * 681 * @param left The left coordinate of the rectangle 682 * @param top The top coordinate of the rectangle 683 * @param right The right coordinate of the rectangle 684 * @param bottom The bottom coordinate of the rectangle 685 * @param texture The texture to use 686 * @param paint The paint containing the alpha, blending mode, etc. 687 */ 688 void drawTextureRect(float left, float top, float right, float bottom, 689 Texture* texture, const SkPaint* paint); 690 691 /** 692 * Draws a textured mesh with the specified texture. If the indices are omitted, 693 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 694 * VBO is bound. 695 * 696 * @param left The left coordinate of the rectangle 697 * @param top The top coordinate of the rectangle 698 * @param right The right coordinate of the rectangle 699 * @param bottom The bottom coordinate of the rectangle 700 * @param texture The texture name to map onto the rectangle 701 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 702 * @param blend True if the texture contains an alpha channel 703 * @param vertices The vertices that define the mesh 704 * @param texCoords The texture coordinates of each vertex 705 * @param elementsCount The number of elements in the mesh, required by indices 706 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 707 * @param ignoreTransform True if the current transform should be ignored 708 * @param vbo The VBO used to draw the mesh 709 * @param modelViewMode Defines whether the model view matrix should be scaled 710 * @param dirty True if calling this method should dirty the current layer 711 */ 712 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 713 const SkPaint* paint, bool blend, 714 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 715 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 716 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 717 718 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 719 const SkPaint* paint, bool blend, 720 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 721 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 722 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 723 724 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 725 GLuint texture, const SkPaint* paint, 726 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 727 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 728 bool dirty = true); 729 730 /** 731 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 732 * If the number of vertices to draw exceeds the number of indices we have 733 * pre-allocated, this method will generate several glDrawElements() calls. 734 */ 735 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 736 737 /** 738 * Draws text underline and strike-through if needed. 739 * 740 * @param text The text to decor 741 * @param bytesCount The number of bytes in the text 742 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 743 * @param x The x coordinate where the text will be drawn 744 * @param y The y coordinate where the text will be drawn 745 * @param paint The paint to draw the text with 746 */ 747 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 748 749 /** 750 * Draws shadow layer on text (with optional positions). 751 * 752 * @param paint The paint to draw the shadow with 753 * @param text The text to draw 754 * @param bytesCount The number of bytes in the text 755 * @param count The number of glyphs in the text 756 * @param positions The x, y positions of individual glyphs (or NULL) 757 * @param fontRenderer The font renderer object 758 * @param alpha The alpha value for drawing the shadow 759 * @param x The x coordinate where the shadow will be drawn 760 * @param y The y coordinate where the shadow will be drawn 761 */ 762 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 763 const float* positions, FontRenderer& fontRenderer, int alpha, 764 float x, float y); 765 766 /** 767 * Draws a path texture. Path textures are alpha8 bitmaps that need special 768 * compositing to apply colors/filters/etc. 769 * 770 * @param texture The texture to render 771 * @param x The x coordinate where the texture will be drawn 772 * @param y The y coordinate where the texture will be drawn 773 * @param paint The paint to draw the texture with 774 */ 775 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 776 777 /** 778 * Resets the texture coordinates stored in mMeshVertices. Setting the values 779 * back to default is achieved by calling: 780 * 781 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 782 * 783 * @param u1 The left coordinate of the texture 784 * @param v1 The bottom coordinate of the texture 785 * @param u2 The right coordinate of the texture 786 * @param v2 The top coordinate of the texture 787 */ 788 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 789 790 /** 791 * Returns true if the specified paint will draw invisible text. 792 */ 793 bool canSkipText(const SkPaint* paint) const; 794 795 /** 796 * Binds the specified texture. The texture unit must have been selected 797 * prior to calling this method. 798 */ 799 inline void bindTexture(GLuint texture) { 800 mCaches.bindTexture(texture); 801 } 802 803 /** 804 * Binds the specified EGLImage texture. The texture unit must have been selected 805 * prior to calling this method. 806 */ 807 inline void bindExternalTexture(GLuint texture) { 808 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 809 } 810 811 /** 812 * Enable or disable blending as necessary. This function sets the appropriate 813 * blend function based on the specified xfermode. 814 */ 815 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 816 bool swapSrcDst = false); 817 818 /** 819 * Use the specified program with the current GL context. If the program is already 820 * in use, it will not be bound again. If it is not in use, the current program is 821 * marked unused and the specified program becomes used and becomes the new 822 * current program. 823 * 824 * @param program The program to use 825 * 826 * @return true If the specified program was already in use, false otherwise. 827 */ 828 inline bool useProgram(Program* program); 829 830 /** 831 * Invoked before any drawing operation. This sets required state. 832 */ 833 void setupDraw(bool clear = true); 834 835 /** 836 * Various methods to setup OpenGL rendering. 837 */ 838 void setupDrawWithTexture(bool isAlpha8 = false); 839 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 840 void setupDrawWithExternalTexture(); 841 void setupDrawNoTexture(); 842 void setupDrawAA(); 843 void setupDrawColor(int color, int alpha); 844 void setupDrawColor(float r, float g, float b, float a); 845 void setupDrawAlpha8Color(int color, int alpha); 846 void setupDrawTextGamma(const SkPaint* paint); 847 void setupDrawShader(const SkShader* shader); 848 void setupDrawColorFilter(const SkColorFilter* filter); 849 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 850 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 851 void setupDrawProgram(); 852 void setupDrawDirtyRegionsDisabled(); 853 854 /** 855 * Setup the current program matrices based upon the nature of the geometry. 856 * 857 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 858 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 859 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 860 * transformations are stored in the modelView matrix and uploaded to the shader. 861 * 862 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 863 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 864 * 865 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 866 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 867 * or when simple translation has been extracted) 868 */ 869 void setupDrawModelView(ModelViewMode mode, bool offset, 870 float left, float top, float right, float bottom, bool ignoreTransform = false); 871 void setupDrawColorUniforms(bool hasShader); 872 void setupDrawPureColorUniforms(); 873 874 /** 875 * Setup uniforms for the current shader. 876 * 877 * @param shader SkShader on the current paint. 878 * 879 * @param ignoreTransform Set to true to ignore the transform in shader. 880 */ 881 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 882 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 883 void setupDrawSimpleMesh(); 884 void setupDrawTexture(GLuint texture); 885 void setupDrawExternalTexture(GLuint texture); 886 void setupDrawTextureTransform(); 887 void setupDrawTextureTransformUniforms(mat4& transform); 888 void setupDrawTextGammaUniforms(); 889 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 890 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 891 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 892 void setupDrawIndexedVertices(GLvoid* vertices); 893 void accountForClear(SkXfermode::Mode mode); 894 895 bool updateLayer(Layer* layer, bool inFrame); 896 void updateLayers(); 897 void flushLayers(); 898 899#if DEBUG_LAYERS_AS_REGIONS 900 /** 901 * Renders the specified region as a series of rectangles. This method 902 * is used for debugging only. 903 */ 904 void drawRegionRectsDebug(const Region& region); 905#endif 906 907 /** 908 * Renders the specified region as a series of rectangles. The region 909 * must be in screen-space coordinates. 910 */ 911 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 912 913 /** 914 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 915 * is turned on. 916 */ 917 void debugClip(); 918 919 void debugOverdraw(bool enable, bool clear); 920 void renderOverdraw(); 921 void countOverdraw(); 922 923 /** 924 * Should be invoked every time the glScissor is modified. 925 */ 926 inline void dirtyClip() { 927 mDirtyClip = true; 928 } 929 930 inline const UvMapper& getMapper(const Texture* texture) { 931 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 932 } 933 934 /** 935 * Returns a texture object for the specified bitmap. The texture can 936 * come from the texture cache or an atlas. If this method returns 937 * NULL, the texture could not be found and/or allocated. 938 */ 939 Texture* getTexture(const SkBitmap* bitmap); 940 941 /** 942 * Model-view matrix used to position/size objects 943 * 944 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 945 * currentTransform(). 946 * 947 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 948 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 949 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 950 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 951 * of a bitmap. 952 * 953 * Used as input to SkiaShader transformation. 954 */ 955 mat4 mModelViewMatrix; 956 957 // State used to define the clipping region 958 Rect mTilingClip; 959 // Is the target render surface opaque 960 bool mOpaque; 961 // Is a frame currently being rendered 962 bool mFrameStarted; 963 964 // Used to draw textured quads 965 TextureVertex mMeshVertices[4]; 966 967 // Default UV mapper 968 const UvMapper mUvMapper; 969 970 // shader, filters, and shadow 971 DrawModifiers mDrawModifiers; 972 SkPaint mFilteredPaint; 973 974 // Various caches 975 Caches& mCaches; 976 Extensions& mExtensions; 977 RenderState& mRenderState; 978 979 // List of rectangles to clear after saveLayer() is invoked 980 Vector<Rect*> mLayers; 981 // List of layers to update at the beginning of a frame 982 Vector<Layer*> mLayerUpdates; 983 984 // The following fields are used to setup drawing 985 // Used to describe the shaders to generate 986 ProgramDescription mDescription; 987 // Color description 988 bool mColorSet; 989 float mColorA, mColorR, mColorG, mColorB; 990 // Indicates that the shader should get a color 991 bool mSetShaderColor; 992 // Current texture unit 993 GLuint mTextureUnit; 994 // Track dirty regions, true by default 995 bool mTrackDirtyRegions; 996 // Indicate whether we are drawing an opaque frame 997 bool mOpaqueFrame; 998 999 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1000 // Properties.h 1001 bool mScissorOptimizationDisabled; 1002 1003 // No-ops start/endTiling when set 1004 bool mSuppressTiling; 1005 1006 // If true, this renderer will setup drawing to emulate 1007 // an increment stencil buffer in the color buffer 1008 bool mCountOverdraw; 1009 float mOverdraw; 1010 1011 bool mSkipOutlineClip; 1012 1013 friend class Layer; 1014 friend class TextSetupFunctor; 1015 friend class DrawBitmapOp; 1016 friend class DrawPatchOp; 1017 1018}; // class OpenGLRenderer 1019 1020}; // namespace uirenderer 1021}; // namespace android 1022 1023#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1024