OpenGLRenderer.h revision d490aa426090fc358873821b47ef27ead0c97409
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 RenderNode; 61class TextSetupFunctor; 62class VertexBuffer; 63 64struct DrawModifiers { 65 DrawModifiers() { 66 reset(); 67 } 68 69 void reset() { 70 memset(this, 0, sizeof(DrawModifiers)); 71 } 72 73 float mOverrideLayerAlpha; 74 75 // Draw filters 76 bool mHasDrawFilter; 77 int mPaintFilterClearBits; 78 int mPaintFilterSetBits; 79}; 80 81enum StateDeferFlags { 82 kStateDeferFlag_Draw = 0x1, 83 kStateDeferFlag_Clip = 0x2 84}; 85 86enum ClipSideFlags { 87 kClipSide_None = 0x0, 88 kClipSide_Left = 0x1, 89 kClipSide_Top = 0x2, 90 kClipSide_Right = 0x4, 91 kClipSide_Bottom = 0x8, 92 kClipSide_Full = 0xF, 93 kClipSide_ConservativeFull = 0x1F 94}; 95 96/** 97 * Defines additional transformation that should be applied by the model view matrix, beyond that of 98 * the currentTransform() 99 */ 100enum ModelViewMode { 101 /** 102 * Used when the model view should simply translate geometry passed to the shader. The resulting 103 * matrix will be a simple translation. 104 */ 105 kModelViewMode_Translate = 0, 106 107 /** 108 * Used when the model view should translate and scale geometry. The resulting matrix will be a 109 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 110 */ 111 kModelViewMode_TranslateAndScale = 1, 112}; 113 114enum VertexBufferMode { 115 kVertexBufferMode_Standard = 0, 116 kVertexBufferMode_OnePolyRingShadow = 1, 117 kVertexBufferMode_TwoPolyRingShadow = 2 118}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public StatefulBaseRenderer { 127public: 128 ANDROID_API OpenGLRenderer(); 129 virtual ~OpenGLRenderer(); 130 131 ANDROID_API void initProperties(); 132 133 virtual void onViewportInitialized(); 134 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 135 virtual void finish(); 136 virtual void interrupt(); 137 virtual void resume(); 138 139 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 140 mCountOverdraw = enabled; 141 } 142 143 ANDROID_API float getOverdraw() { 144 return mCountOverdraw ? mOverdraw : 0.0f; 145 } 146 147 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 148 149 ANDROID_API void pushLayerUpdate(Layer* layer); 150 ANDROID_API void cancelLayerUpdate(Layer* layer); 151 ANDROID_API void clearLayerUpdates(); 152 ANDROID_API void flushLayerUpdates(); 153 154 ANDROID_API 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 drawDisplayList(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, float left, float top, 170 const SkPaint* paint); 171 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 172 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 173 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 174 const SkPaint* paint); 175 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 176 float srcRight, float srcBottom, float dstLeft, float dstTop, 177 float dstRight, float dstBottom, const SkPaint* paint); 178 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 179 const SkPaint* paint); 180 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 181 const float* vertices, const int* colors, const SkPaint* paint); 182 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 183 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 184 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 185 float left, float top, float right, float bottom, const SkPaint* paint); 186 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 187 float left, float top, float right, float bottom, const SkPaint* paint); 188 virtual status_t drawColor(int color, SkXfermode::Mode mode); 189 virtual status_t drawRect(float left, float top, float right, float bottom, 190 const SkPaint* paint); 191 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 192 float rx, float ry, const SkPaint* paint); 193 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 194 virtual status_t drawCircle(CanvasPropertyPrimitive* x, CanvasPropertyPrimitive* y, 195 CanvasPropertyPrimitive* radius, CanvasPropertyPaint* paint) { 196 // TODO: Remove once android_view_GLES20Canvas uses DisplayListRenderer 197 // directly 198 return drawCircle(x->value, y->value, radius->value, &paint->value); 199 } 200 virtual status_t drawOval(float left, float top, float right, float bottom, 201 const SkPaint* paint); 202 virtual status_t drawArc(float left, float top, float right, float bottom, 203 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 204 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 205 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 206 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 207 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 208 float hOffset, float vOffset, const SkPaint* paint); 209 virtual status_t drawPosText(const char* text, int bytesCount, int count, 210 const float* positions, const SkPaint* paint); 211 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 212 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 213 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 214 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 215 216 status_t drawShadow(const mat4& casterTransformXY, const mat4& casterTransformZ, 217 float casterAlpha, bool casterUnclipped, const SkPath* casterPerimeter); 218 219 virtual void resetPaintFilter(); 220 virtual void setupPaintFilter(int clearBits, int setBits); 221 222 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 223 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 224 225 const SkPaint* filterPaint(const SkPaint* paint); 226 227 /** 228 * Store the current display state (most importantly, the current clip and transform), and 229 * additionally map the state's bounds from local to window coordinates. 230 * 231 * Returns true if quick-rejected 232 */ 233 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 234 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 235 void setupMergedMultiDraw(const Rect* clipRect); 236 237 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 238 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 239 240 ANDROID_API bool isCurrentTransformSimple() { 241 return currentTransform()->isSimple(); 242 } 243 244 Caches& getCaches() { 245 return mCaches; 246 } 247 248 // simple rect clip 249 bool isCurrentClipSimple() { 250 return mSnapshot->clipRegion->isEmpty(); 251 } 252 253 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 254 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 255 256 /** 257 * Scales the alpha on the current snapshot. This alpha value will be modulated 258 * with other alpha values when drawing primitives. 259 */ 260 void scaleAlpha(float alpha) { 261 mSnapshot->alpha *= alpha; 262 } 263 264 /** 265 * Inserts a named event marker in the stream of GL commands. 266 */ 267 void eventMark(const char* name) const; 268 269 /** 270 * Inserts a named group marker in the stream of GL commands. This marker 271 * can be used by tools to group commands into logical groups. A call to 272 * this method must always be followed later on by a call to endMark(). 273 */ 274 void startMark(const char* name) const; 275 276 /** 277 * Closes the last group marker opened by startMark(). 278 */ 279 void endMark() const; 280 281 /** 282 * Gets the alpha and xfermode out of a paint object. If the paint is null 283 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 284 * not multiply the paint's alpha by the current snapshot's alpha, and does 285 * not replace the alpha with the overrideLayerAlpha 286 * 287 * @param paint The paint to extract values from 288 * @param alpha Where to store the resulting alpha 289 * @param mode Where to store the resulting xfermode 290 */ 291 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 292 *mode = getXfermodeDirect(paint); 293 *alpha = getAlphaDirect(paint); 294 } 295 296 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 297 if (!paint) return SkXfermode::kSrcOver_Mode; 298 return getXfermode(paint->getXfermode()); 299 } 300 301 static inline int getAlphaDirect(const SkPaint* paint) { 302 if (!paint) return 255; 303 return paint->getAlpha(); 304 } 305 306 struct TextShadow { 307 SkScalar radius; 308 float dx; 309 float dy; 310 SkColor color; 311 }; 312 313 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 314 SkDrawLooper::BlurShadowRec blur; 315 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 316 if (textShadow) { 317 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 318 textShadow->dx = blur.fOffset.fX; 319 textShadow->dy = blur.fOffset.fY; 320 textShadow->color = blur.fColor; 321 } 322 return true; 323 } 324 return false; 325 } 326 327 static inline bool hasTextShadow(const SkPaint* paint) { 328 return getTextShadow(paint, NULL); 329 } 330 331 /** 332 * Return the best transform to use to rasterize text given a full 333 * transform matrix. 334 */ 335 mat4 findBestFontTransform(const mat4& transform) const; 336 337#if DEBUG_MERGE_BEHAVIOR 338 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 339 mCaches.setScissorEnabled(false); 340 341 // should only be called outside of other draw ops, so stencil can only be in test state 342 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 343 mCaches.stencil.disable(); 344 345 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 346 347 if (stencilWasEnabled) mCaches.stencil.enableTest(); 348 } 349#endif 350 351protected: 352 /** 353 * Perform the setup specific to a frame. This method does not 354 * issue any OpenGL commands. 355 */ 356 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 357 358 /** 359 * Indicates the start of rendering. This method will setup the 360 * initial OpenGL state (viewport, clearing the buffer, etc.) 361 */ 362 status_t startFrame(); 363 364 /** 365 * Clears the underlying surface if needed. 366 */ 367 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 368 369 /** 370 * Call this method after updating a layer during a drawing pass. 371 */ 372 void resumeAfterLayer(); 373 374 /** 375 * This method is called whenever a stencil buffer is required. Subclasses 376 * should override this method and call attachStencilBufferToLayer() on the 377 * appropriate layer(s). 378 */ 379 virtual void ensureStencilBuffer(); 380 381 /** 382 * Obtains a stencil render buffer (allocating it if necessary) and 383 * attaches it to the specified layer. 384 */ 385 void attachStencilBufferToLayer(Layer* layer); 386 387 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 388 const SkPaint* paint = NULL); 389 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 390 return quickRejectSetupScissor(bounds.left, bounds.top, 391 bounds.right, bounds.bottom, paint); 392 } 393 394 /** 395 * Compose the layer defined in the current snapshot with the layer 396 * defined by the previous snapshot. 397 * 398 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 399 * 400 * @param curent The current snapshot containing the layer to compose 401 * @param previous The previous snapshot to compose the current layer with 402 */ 403 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 404 405 /** 406 * Marks the specified region as dirty at the specified bounds. 407 */ 408 void dirtyLayerUnchecked(Rect& bounds, Region* region); 409 410 /** 411 * Returns the region of the current layer. 412 */ 413 virtual Region* getRegion() const { 414 return mSnapshot->region; 415 } 416 417 /** 418 * Indicates whether rendering is currently targeted at a layer. 419 */ 420 virtual bool hasLayer() const { 421 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 422 } 423 424 /** 425 * Returns the name of the FBO this renderer is rendering into. 426 */ 427 virtual GLuint getTargetFbo() const { 428 return 0; 429 } 430 431 /** 432 * Renders the specified layer as a textured quad. 433 * 434 * @param layer The layer to render 435 * @param rect The bounds of the layer 436 */ 437 void drawTextureLayer(Layer* layer, const Rect& rect); 438 439 /** 440 * Gets the alpha and xfermode out of a paint object. If the paint is null 441 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 442 * snapshot alpha, and overrideLayerAlpha 443 * 444 * @param paint The paint to extract values from 445 * @param alpha Where to store the resulting alpha 446 * @param mode Where to store the resulting xfermode 447 */ 448 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 449 450 /** 451 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 452 * 453 * @param layer The layer from which the alpha is extracted 454 */ 455 inline float getLayerAlpha(const Layer* layer) const; 456 457 /** 458 * Safely retrieves the ColorFilter from the given Paint. If the paint is 459 * null then null is returned. 460 */ 461 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 462 return paint ? paint->getColorFilter() : NULL; 463 } 464 465 /** 466 * Safely retrieves the Shader from the given Paint. If the paint is 467 * null then null is returned. 468 */ 469 static inline const SkShader* getShader(const SkPaint* paint) { 470 return paint ? paint->getShader() : NULL; 471 } 472 473 /** 474 * Set to true to suppress error checks at the end of a frame. 475 */ 476 virtual bool suppressErrorChecks() const { 477 return false; 478 } 479 480private: 481 /** 482 * Discards the content of the framebuffer if supported by the driver. 483 * This method should be called at the beginning of a frame to optimize 484 * rendering on some tiler architectures. 485 */ 486 void discardFramebuffer(float left, float top, float right, float bottom); 487 488 /** 489 * Ensures the state of the renderer is the same as the state of 490 * the GL context. 491 */ 492 void syncState(); 493 494 /** 495 * Tells the GPU what part of the screen is about to be redrawn. 496 * This method will use the current layer space clip rect. 497 * This method needs to be invoked every time getTargetFbo() is 498 * bound again. 499 */ 500 void startTilingCurrentClip(bool opaque = false); 501 502 /** 503 * Tells the GPU what part of the screen is about to be redrawn. 504 * This method needs to be invoked every time getTargetFbo() is 505 * bound again. 506 */ 507 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 508 509 /** 510 * Tells the GPU that we are done drawing the frame or that we 511 * are switching to another render target. 512 */ 513 void endTiling(); 514 515 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 516 517 /** 518 * Sets the clipping rectangle using glScissor. The clip is defined by 519 * the current snapshot's clipRect member. 520 */ 521 void setScissorFromClip(); 522 523 /** 524 * Sets the clipping region using the stencil buffer. The clip region 525 * is defined by the current snapshot's clipRegion member. 526 */ 527 void setStencilFromClip(); 528 529 /** 530 * Given the local bounds of the layer, calculates ... 531 */ 532 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 533 534 /** 535 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 536 */ 537 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 538 bool fboLayer, int alpha); 539 540 /** 541 * Creates a new layer stored in the specified snapshot. 542 * 543 * @param snapshot The snapshot associated with the new layer 544 * @param left The left coordinate of the layer 545 * @param top The top coordinate of the layer 546 * @param right The right coordinate of the layer 547 * @param bottom The bottom coordinate of the layer 548 * @param alpha The translucency of the layer 549 * @param mode The blending mode of the layer 550 * @param flags The layer save flags 551 * @param mask A mask to use when drawing the layer back, may be empty 552 * 553 * @return True if the layer was successfully created, false otherwise 554 */ 555 bool createLayer(float left, float top, float right, float bottom, 556 const SkPaint* paint, int flags, const SkPath* convexMask); 557 558 /** 559 * Creates a new layer stored in the specified snapshot as an FBO. 560 * 561 * @param layer The layer to store as an FBO 562 * @param snapshot The snapshot associated with the new layer 563 * @param bounds The bounds of the layer 564 */ 565 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 566 567 /** 568 * Compose the specified layer as a region. 569 * 570 * @param layer The layer to compose 571 * @param rect The layer's bounds 572 */ 573 void composeLayerRegion(Layer* layer, const Rect& rect); 574 575 /** 576 * Compose the specified layer as a simple rectangle. 577 * 578 * @param layer The layer to compose 579 * @param rect The layer's bounds 580 * @param swap If true, the source and destination are swapped 581 */ 582 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 583 584 /** 585 * Clears all the regions corresponding to the current list of layers. 586 * This method MUST be invoked before any drawing operation. 587 */ 588 void clearLayerRegions(); 589 590 /** 591 * Mark the layer as dirty at the specified coordinates. The coordinates 592 * are transformed with the supplied matrix. 593 */ 594 void dirtyLayer(const float left, const float top, 595 const float right, const float bottom, const mat4 transform); 596 597 /** 598 * Mark the layer as dirty at the specified coordinates. 599 */ 600 void dirtyLayer(const float left, const float top, 601 const float right, const float bottom); 602 603 /** 604 * Draws a colored rectangle with the specified color. The specified coordinates 605 * are transformed by the current snapshot's transform matrix unless specified 606 * otherwise. 607 * 608 * @param left The left coordinate of the rectangle 609 * @param top The top coordinate of the rectangle 610 * @param right The right coordinate of the rectangle 611 * @param bottom The bottom coordinate of the rectangle 612 * @param paint The paint containing the color, blending mode, etc. 613 * @param ignoreTransform True if the current transform should be ignored 614 */ 615 void drawColorRect(float left, float top, float right, float bottom, 616 const SkPaint* paint, bool ignoreTransform = false); 617 618 /** 619 * Draws a series of colored rectangles with the specified color. The specified 620 * coordinates are transformed by the current snapshot's transform matrix unless 621 * specified otherwise. 622 * 623 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 624 * per rectangle 625 * @param paint The paint containing the color, blending mode, etc. 626 * @param ignoreTransform True if the current transform should be ignored 627 * @param dirty True if calling this method should dirty the current layer 628 * @param clip True if the rects should be clipped, false otherwise 629 */ 630 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 631 bool ignoreTransform = false, bool dirty = true, bool clip = true); 632 633 /** 634 * Draws the shape represented by the specified path texture. 635 * This method invokes drawPathTexture() but takes into account 636 * the extra left/top offset and the texture offset to correctly 637 * position the final shape. 638 * 639 * @param left The left coordinate of the shape to render 640 * @param top The top coordinate of the shape to render 641 * @param texture The texture reprsenting the shape 642 * @param paint The paint to draw the shape with 643 */ 644 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 645 646 /** 647 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 648 * different compositing rules. 649 * 650 * @param texture The texture to draw with 651 * @param left The x coordinate of the bitmap 652 * @param top The y coordinate of the bitmap 653 * @param paint The paint to render with 654 */ 655 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 656 657 /** 658 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 659 * 660 * @param vertexBuffer The VertexBuffer to be drawn 661 * @param paint The paint to render with 662 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 663 */ 664 status_t drawVertexBuffer(VertexBufferMode mode, const VertexBuffer& vertexBuffer, 665 const SkPaint* paint, bool useOffset = false); 666 667 /** 668 * Renders the convex hull defined by the specified path as a strip of polygons. 669 * 670 * @param path The hull of the path to draw 671 * @param paint The paint to render with 672 */ 673 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 674 675 /** 676 * Draws a textured rectangle with the specified texture. The specified coordinates 677 * are transformed by the current snapshot's transform matrix. 678 * 679 * @param left The left coordinate of the rectangle 680 * @param top The top coordinate of the rectangle 681 * @param right The right coordinate of the rectangle 682 * @param bottom The bottom coordinate of the rectangle 683 * @param texture The texture to use 684 * @param paint The paint containing the alpha, blending mode, etc. 685 */ 686 void drawTextureRect(float left, float top, float right, float bottom, 687 Texture* texture, const SkPaint* paint); 688 689 /** 690 * Draws a textured mesh with the specified texture. If the indices are omitted, 691 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 692 * VBO is bound. 693 * 694 * @param left The left coordinate of the rectangle 695 * @param top The top coordinate of the rectangle 696 * @param right The right coordinate of the rectangle 697 * @param bottom The bottom coordinate of the rectangle 698 * @param texture The texture name to map onto the rectangle 699 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 700 * @param blend True if the texture contains an alpha channel 701 * @param vertices The vertices that define the mesh 702 * @param texCoords The texture coordinates of each vertex 703 * @param elementsCount The number of elements in the mesh, required by indices 704 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 705 * @param ignoreTransform True if the current transform should be ignored 706 * @param vbo The VBO used to draw the mesh 707 * @param modelViewMode Defines whether the model view matrix should be scaled 708 * @param dirty True if calling this method should dirty the current layer 709 */ 710 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 711 const SkPaint* paint, bool blend, 712 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 713 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 714 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 715 716 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 717 const SkPaint* paint, bool blend, 718 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 719 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 720 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 721 722 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 723 GLuint texture, const SkPaint* paint, 724 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 725 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 726 bool dirty = true); 727 728 /** 729 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 730 * If the number of vertices to draw exceeds the number of indices we have 731 * pre-allocated, this method will generate several glDrawElements() calls. 732 */ 733 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 734 735 /** 736 * Draws text underline and strike-through if needed. 737 * 738 * @param text The text to decor 739 * @param bytesCount The number of bytes in the text 740 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 741 * @param x The x coordinate where the text will be drawn 742 * @param y The y coordinate where the text will be drawn 743 * @param paint The paint to draw the text with 744 */ 745 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 746 747 /** 748 * Draws shadow layer on text (with optional positions). 749 * 750 * @param paint The paint to draw the shadow with 751 * @param text The text to draw 752 * @param bytesCount The number of bytes in the text 753 * @param count The number of glyphs in the text 754 * @param positions The x, y positions of individual glyphs (or NULL) 755 * @param fontRenderer The font renderer object 756 * @param alpha The alpha value for drawing the shadow 757 * @param x The x coordinate where the shadow will be drawn 758 * @param y The y coordinate where the shadow will be drawn 759 */ 760 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 761 const float* positions, FontRenderer& fontRenderer, int alpha, 762 float x, float y); 763 764 /** 765 * Draws a path texture. Path textures are alpha8 bitmaps that need special 766 * compositing to apply colors/filters/etc. 767 * 768 * @param texture The texture to render 769 * @param x The x coordinate where the texture will be drawn 770 * @param y The y coordinate where the texture will be drawn 771 * @param paint The paint to draw the texture with 772 */ 773 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 774 775 /** 776 * Resets the texture coordinates stored in mMeshVertices. Setting the values 777 * back to default is achieved by calling: 778 * 779 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 780 * 781 * @param u1 The left coordinate of the texture 782 * @param v1 The bottom coordinate of the texture 783 * @param u2 The right coordinate of the texture 784 * @param v2 The top coordinate of the texture 785 */ 786 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 787 788 /** 789 * Returns true if the specified paint will draw invisible text. 790 */ 791 bool canSkipText(const SkPaint* paint) const; 792 793 /** 794 * Binds the specified texture. The texture unit must have been selected 795 * prior to calling this method. 796 */ 797 inline void bindTexture(GLuint texture) { 798 mCaches.bindTexture(texture); 799 } 800 801 /** 802 * Binds the specified EGLImage texture. The texture unit must have been selected 803 * prior to calling this method. 804 */ 805 inline void bindExternalTexture(GLuint texture) { 806 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 807 } 808 809 /** 810 * Enable or disable blending as necessary. This function sets the appropriate 811 * blend function based on the specified xfermode. 812 */ 813 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 814 bool swapSrcDst = false); 815 816 /** 817 * Use the specified program with the current GL context. If the program is already 818 * in use, it will not be bound again. If it is not in use, the current program is 819 * marked unused and the specified program becomes used and becomes the new 820 * current program. 821 * 822 * @param program The program to use 823 * 824 * @return true If the specified program was already in use, false otherwise. 825 */ 826 inline bool useProgram(Program* program); 827 828 /** 829 * Invoked before any drawing operation. This sets required state. 830 */ 831 void setupDraw(bool clear = true); 832 833 /** 834 * Various methods to setup OpenGL rendering. 835 */ 836 void setupDrawWithTexture(bool isAlpha8 = false); 837 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 838 void setupDrawWithExternalTexture(); 839 void setupDrawNoTexture(); 840 void setupDrawAA(); 841 void setupDrawColor(int color, int alpha); 842 void setupDrawColor(float r, float g, float b, float a); 843 void setupDrawAlpha8Color(int color, int alpha); 844 void setupDrawTextGamma(const SkPaint* paint); 845 void setupDrawShader(const SkShader* shader); 846 void setupDrawColorFilter(const SkColorFilter* filter); 847 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 848 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 849 void setupDrawProgram(); 850 void setupDrawDirtyRegionsDisabled(); 851 852 /** 853 * Setup the current program matrices based upon the nature of the geometry. 854 * 855 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 856 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 857 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 858 * transformations are stored in the modelView matrix and uploaded to the shader. 859 * 860 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 861 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 862 * 863 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 864 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 865 * or when simple translation has been extracted) 866 */ 867 void setupDrawModelView(ModelViewMode mode, bool offset, 868 float left, float top, float right, float bottom, bool ignoreTransform = false); 869 void setupDrawColorUniforms(bool hasShader); 870 void setupDrawPureColorUniforms(); 871 872 /** 873 * Setup uniforms for the current shader. 874 * 875 * @param shader SkShader on the current paint. 876 * 877 * @param ignoreTransform Set to true to ignore the transform in shader. 878 */ 879 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 880 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 881 void setupDrawSimpleMesh(); 882 void setupDrawTexture(GLuint texture); 883 void setupDrawExternalTexture(GLuint texture); 884 void setupDrawTextureTransform(); 885 void setupDrawTextureTransformUniforms(mat4& transform); 886 void setupDrawTextGammaUniforms(); 887 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 888 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 889 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 890 void setupDrawIndexedVertices(GLvoid* vertices); 891 void accountForClear(SkXfermode::Mode mode); 892 893 bool updateLayer(Layer* layer, bool inFrame); 894 void updateLayers(); 895 void flushLayers(); 896 897#if DEBUG_LAYERS_AS_REGIONS 898 /** 899 * Renders the specified region as a series of rectangles. This method 900 * is used for debugging only. 901 */ 902 void drawRegionRectsDebug(const Region& region); 903#endif 904 905 /** 906 * Renders the specified region as a series of rectangles. The region 907 * must be in screen-space coordinates. 908 */ 909 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 910 911 /** 912 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 913 * is turned on. 914 */ 915 void debugClip(); 916 917 void debugOverdraw(bool enable, bool clear); 918 void renderOverdraw(); 919 void countOverdraw(); 920 921 /** 922 * Should be invoked every time the glScissor is modified. 923 */ 924 inline void dirtyClip() { 925 mDirtyClip = true; 926 } 927 928 inline const UvMapper& getMapper(const Texture* texture) { 929 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 930 } 931 932 /** 933 * Returns a texture object for the specified bitmap. The texture can 934 * come from the texture cache or an atlas. If this method returns 935 * NULL, the texture could not be found and/or allocated. 936 */ 937 Texture* getTexture(const SkBitmap* bitmap); 938 939 /** 940 * Model-view matrix used to position/size objects 941 * 942 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 943 * currentTransform(). 944 * 945 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 946 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 947 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 948 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 949 * of a bitmap. 950 * 951 * Used as input to SkiaShader transformation. 952 */ 953 mat4 mModelViewMatrix; 954 955 // State used to define the clipping region 956 Rect mTilingClip; 957 // Is the target render surface opaque 958 bool mOpaque; 959 // Is a frame currently being rendered 960 bool mFrameStarted; 961 962 // Used to draw textured quads 963 TextureVertex mMeshVertices[4]; 964 965 // Default UV mapper 966 const UvMapper mUvMapper; 967 968 // shader, filters, and shadow 969 DrawModifiers mDrawModifiers; 970 SkPaint mFilteredPaint; 971 972 // Various caches 973 Caches& mCaches; 974 Extensions& mExtensions; 975 976 // List of rectangles to clear after saveLayer() is invoked 977 Vector<Rect*> mLayers; 978 // List of layers to update at the beginning of a frame 979 Vector<Layer*> mLayerUpdates; 980 981 // The following fields are used to setup drawing 982 // Used to describe the shaders to generate 983 ProgramDescription mDescription; 984 // Color description 985 bool mColorSet; 986 float mColorA, mColorR, mColorG, mColorB; 987 // Indicates that the shader should get a color 988 bool mSetShaderColor; 989 // Current texture unit 990 GLuint mTextureUnit; 991 // Track dirty regions, true by default 992 bool mTrackDirtyRegions; 993 // Indicate whether we are drawing an opaque frame 994 bool mOpaqueFrame; 995 996 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 997 // Properties.h 998 bool mScissorOptimizationDisabled; 999 1000 // No-ops start/endTiling when set 1001 bool mSuppressTiling; 1002 1003 // If true, this renderer will setup drawing to emulate 1004 // an increment stencil buffer in the color buffer 1005 bool mCountOverdraw; 1006 float mOverdraw; 1007 1008 bool mSkipOutlineClip; 1009 1010 friend class DisplayListRenderer; 1011 friend class Layer; 1012 friend class TextSetupFunctor; 1013 friend class DrawBitmapOp; 1014 friend class DrawPatchOp; 1015 1016}; // class OpenGLRenderer 1017 1018}; // namespace uirenderer 1019}; // namespace android 1020 1021#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1022