OpenGLRenderer.h revision b458942bb6e6cf13c68341dda35ef5cee060f5ae
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 <SkMatrix.h> 25#include <SkPaint.h> 26#include <SkRegion.h> 27#include <SkShader.h> 28#include <SkXfermode.h> 29 30#include <utils/Functor.h> 31#include <utils/RefBase.h> 32#include <utils/SortedVector.h> 33#include <utils/Vector.h> 34 35#include <cutils/compiler.h> 36 37#include <androidfw/ResourceTypes.h> 38 39#include "Debug.h" 40#include "Extensions.h" 41#include "Matrix.h" 42#include "Program.h" 43#include "Rect.h" 44#include "Renderer.h" 45#include "SkiaColorFilter.h" 46#include "Snapshot.h" 47#include "UvMapper.h" 48#include "Vertex.h" 49#include "Caches.h" 50 51namespace android { 52namespace uirenderer { 53 54class DeferredDisplayState; 55class DisplayList; 56class TextSetupFunctor; 57class VertexBuffer; 58class SkiaShader; 59 60struct DrawModifiers { 61 DrawModifiers() { 62 reset(); 63 } 64 65 void reset() { 66 memset(this, 0, sizeof(DrawModifiers)); 67 } 68 69 SkiaShader* mShader; 70 SkiaColorFilter* mColorFilter; 71 float mOverrideLayerAlpha; 72 73 // Drop shadow 74 bool mHasShadow; 75 float mShadowRadius; 76 float mShadowDx; 77 float mShadowDy; 78 int mShadowColor; 79 80 // Draw filters 81 bool mHasDrawFilter; 82 int mPaintFilterClearBits; 83 int mPaintFilterSetBits; 84}; 85 86enum StateDeferFlags { 87 kStateDeferFlag_Draw = 0x1, 88 kStateDeferFlag_Clip = 0x2 89}; 90 91enum ClipSideFlags { 92 kClipSide_None = 0x0, 93 kClipSide_Left = 0x1, 94 kClipSide_Top = 0x2, 95 kClipSide_Right = 0x4, 96 kClipSide_Bottom = 0x8, 97 kClipSide_Full = 0xF, 98 kClipSide_ConservativeFull = 0x1F 99}; 100 101/** 102 * Defines additional transformation that should be applied by the model view matrix, beyond that of 103 * the currentTransform() 104 */ 105enum ModelViewMode { 106 /** 107 * Used when the model view should simply translate geometry passed to the shader. The resulting 108 * matrix will be a simple translation. 109 */ 110 kModelViewMode_Translate = 0, 111 112 /** 113 * Used when the model view should translate and scale geometry. The resulting matrix will be a 114 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 115 */ 116 kModelViewMode_TranslateAndScale = 1, 117}; 118 119/////////////////////////////////////////////////////////////////////////////// 120// Renderer 121/////////////////////////////////////////////////////////////////////////////// 122/** 123 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 124 * simplified version of Skia's Canvas API. 125 */ 126class OpenGLRenderer : public Renderer { 127public: 128 ANDROID_API OpenGLRenderer(); 129 virtual ~OpenGLRenderer(); 130 131 ANDROID_API void initProperties(); 132 133 virtual void setViewport(int width, int height); 134 135 virtual status_t prepare(bool opaque); 136 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 137 138 virtual void finish(); 139 virtual void interrupt(); 140 virtual void resume(); 141 142 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 143 mCountOverdraw = enabled; 144 } 145 146 ANDROID_API float getOverdraw() { 147 return mCountOverdraw ? mOverdraw : 0.0f; 148 } 149 150 ANDROID_API status_t invokeFunctors(Rect& dirty); 151 ANDROID_API void detachFunctor(Functor* functor); 152 ANDROID_API void attachFunctor(Functor* functor); 153 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 154 155 ANDROID_API void pushLayerUpdate(Layer* layer); 156 ANDROID_API void cancelLayerUpdate(Layer* layer); 157 ANDROID_API void clearLayerUpdates(); 158 ANDROID_API void flushLayerUpdates(); 159 160 ANDROID_API int getSaveCount() const; 161 virtual int save(int flags); 162 virtual void restore(); 163 virtual void restoreToCount(int saveCount); 164 165 ANDROID_API int saveLayer(float left, float top, float right, float bottom, 166 SkPaint* paint, int flags) { 167 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; 168 if (paint) mode = getXfermode(paint->getXfermode()); 169 return saveLayer(left, top, right, bottom, paint ? paint->getAlpha() : 255, mode, flags); 170 } 171 ANDROID_API int saveLayerAlpha(float left, float top, float right, float bottom, 172 int alpha, int flags) { 173 return saveLayer(left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 174 } 175 virtual int saveLayer(float left, float top, float right, float bottom, 176 int alpha, SkXfermode::Mode mode, int flags); 177 178 int saveLayerDeferred(float left, float top, float right, float bottom, 179 int alpha, SkXfermode::Mode mode, int flags); 180 181 virtual void translate(float dx, float dy, float dz = 0); 182 virtual void rotate(float degrees); 183 virtual void scale(float sx, float sy); 184 virtual void skew(float sx, float sy); 185 186 bool hasRectToRectTransform(); 187 ANDROID_API void getMatrix(SkMatrix* matrix) const; 188 virtual void setMatrix(SkMatrix* matrix); 189 virtual void concatMatrix(SkMatrix* matrix); 190 virtual void concatMatrix(Matrix4& matrix) { 191 currentTransform().multiply(matrix); 192 } 193 194 ANDROID_API const Rect& getClipBounds() const; 195 196 ANDROID_API bool quickRejectConservative(float left, float top, 197 float right, float bottom) const; 198 199 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 200 virtual bool clipPath(SkPath* path, SkRegion::Op op); 201 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 202 virtual Rect* getClipRect(); 203 204 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags); 205 virtual status_t drawLayer(Layer* layer, float x, float y); 206 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 207 status_t drawBitmaps(SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 208 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, SkPaint* paint); 209 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 210 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 211 float srcRight, float srcBottom, float dstLeft, float dstTop, 212 float dstRight, float dstBottom, SkPaint* paint); 213 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 214 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 215 float* vertices, int* colors, SkPaint* paint); 216 status_t drawPatches(SkBitmap* bitmap, AssetAtlas::Entry* entry, 217 TextureVertex* vertices, uint32_t indexCount, SkPaint* paint); 218 virtual status_t drawPatch(SkBitmap* bitmap, Res_png_9patch* patch, 219 float left, float top, float right, float bottom, SkPaint* paint); 220 status_t drawPatch(SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 221 float left, float top, float right, float bottom, SkPaint* paint); 222 virtual status_t drawColor(int color, SkXfermode::Mode mode); 223 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 224 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 225 float rx, float ry, SkPaint* paint); 226 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 227 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 228 virtual status_t drawArc(float left, float top, float right, float bottom, 229 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 230 virtual status_t drawPath(SkPath* path, SkPaint* paint); 231 virtual status_t drawLines(float* points, int count, SkPaint* paint); 232 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 233 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 234 float hOffset, float vOffset, SkPaint* paint); 235 virtual status_t drawPosText(const char* text, int bytesCount, int count, 236 const float* positions, SkPaint* paint); 237 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 238 const float* positions, SkPaint* paint, float totalAdvance, const Rect& bounds, 239 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 240 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 241 242 status_t drawShadow(const mat4& casterTransform, float casterAlpha, 243 float width, float height); 244 245 virtual void resetShader(); 246 virtual void setupShader(SkiaShader* shader); 247 248 virtual void resetColorFilter(); 249 virtual void setupColorFilter(SkiaColorFilter* filter); 250 251 virtual void resetShadow(); 252 virtual void setupShadow(float radius, float dx, float dy, int color); 253 254 virtual void resetPaintFilter(); 255 virtual void setupPaintFilter(int clearBits, int setBits); 256 257 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 258 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 259 260 SkPaint* filterPaint(SkPaint* paint); 261 262 /** 263 * Store the current display state (most importantly, the current clip and transform), and 264 * additionally map the state's bounds from local to window coordinates. 265 * 266 * Returns true if quick-rejected 267 */ 268 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 269 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 270 void setupMergedMultiDraw(const Rect* clipRect); 271 272 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 273 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 274 275 ANDROID_API bool isCurrentTransformSimple() { 276 return mSnapshot->transform->isSimple(); 277 } 278 279 Caches& getCaches() { 280 return mCaches; 281 } 282 283 // simple rect clip 284 bool isCurrentClipSimple() { 285 return mSnapshot->clipRegion->isEmpty(); 286 } 287 288 int getViewportWidth() { return getSnapshot()->viewport.getWidth(); } 289 int getViewportHeight() { return getSnapshot()->viewport.getHeight(); } 290 291 /** 292 * Scales the alpha on the current snapshot. This alpha value will be modulated 293 * with other alpha values when drawing primitives. 294 */ 295 void scaleAlpha(float alpha) { 296 mSnapshot->alpha *= alpha; 297 } 298 299 /** 300 * Inserts a named event marker in the stream of GL commands. 301 */ 302 void eventMark(const char* name) const; 303 304 /** 305 * Inserts a named group marker in the stream of GL commands. This marker 306 * can be used by tools to group commands into logical groups. A call to 307 * this method must always be followed later on by a call to endMark(). 308 */ 309 void startMark(const char* name) const; 310 311 /** 312 * Closes the last group marker opened by startMark(). 313 */ 314 void endMark() const; 315 316 /** 317 * Gets the alpha and xfermode out of a paint object. If the paint is null 318 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 319 * not multiply the paint's alpha by the current snapshot's alpha, and does 320 * not replace the alpha with the overrideLayerAlpha 321 * 322 * @param paint The paint to extract values from 323 * @param alpha Where to store the resulting alpha 324 * @param mode Where to store the resulting xfermode 325 */ 326 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 327 *mode = getXfermodeDirect(paint); 328 *alpha = getAlphaDirect(paint); 329 } 330 331 static inline SkXfermode::Mode getXfermodeDirect(SkPaint* paint) { 332 if (!paint) return SkXfermode::kSrcOver_Mode; 333 return getXfermode(paint->getXfermode()); 334 } 335 336 static inline int getAlphaDirect(const SkPaint* paint) { 337 if (!paint) return 255; 338 return paint->getAlpha(); 339 } 340 341 /** 342 * Return the best transform to use to rasterize text given a full 343 * transform matrix. 344 */ 345 mat4 findBestFontTransform(const mat4& transform) const; 346 347#if DEBUG_MERGE_BEHAVIOR 348 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 349 mCaches.setScissorEnabled(false); 350 351 // should only be called outside of other draw ops, so stencil can only be in test state 352 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 353 mCaches.stencil.disable(); 354 355 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 356 357 if (stencilWasEnabled) mCaches.stencil.enableTest(); 358 } 359#endif 360 361protected: 362 /** 363 * Computes the projection matrix, initialize the first snapshot 364 * and stores the dimensions of the render target. 365 */ 366 void initViewport(int width, int height); 367 368 /** 369 * Perform the setup specific to a frame. This method does not 370 * issue any OpenGL commands. 371 */ 372 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 373 374 /** 375 * Indicates the start of rendering. This method will setup the 376 * initial OpenGL state (viewport, clearing the buffer, etc.) 377 */ 378 status_t startFrame(); 379 380 /** 381 * Clears the underlying surface if needed. 382 */ 383 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 384 385 /** 386 * Call this method after updating a layer during a drawing pass. 387 */ 388 void resumeAfterLayer(); 389 390 /** 391 * This method is called whenever a stencil buffer is required. Subclasses 392 * should override this method and call attachStencilBufferToLayer() on the 393 * appropriate layer(s). 394 */ 395 virtual void ensureStencilBuffer(); 396 397 /** 398 * Obtains a stencil render buffer (allocating it if necessary) and 399 * attaches it to the specified layer. 400 */ 401 void attachStencilBufferToLayer(Layer* layer); 402 403 bool calculateQuickRejectForScissor(float left, float top, float right, float bottom, 404 bool* clipRequired, bool snapOut) const; 405 406 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 407 SkPaint* paint = NULL); 408 bool quickRejectSetupScissor(const Rect& bounds, SkPaint* paint = NULL) { 409 return quickRejectSetupScissor(bounds.left, bounds.top, 410 bounds.right, bounds.bottom, paint); 411 } 412 413 /** 414 * Compose the layer defined in the current snapshot with the layer 415 * defined by the previous snapshot. 416 * 417 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 418 * 419 * @param curent The current snapshot containing the layer to compose 420 * @param previous The previous snapshot to compose the current layer with 421 */ 422 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 423 424 /** 425 * Marks the specified region as dirty at the specified bounds. 426 */ 427 void dirtyLayerUnchecked(Rect& bounds, Region* region); 428 429 /** 430 * Returns the current snapshot. 431 */ 432 sp<Snapshot> getSnapshot() const { 433 return mSnapshot; 434 } 435 436 /** 437 * Returns the region of the current layer. 438 */ 439 virtual Region* getRegion() const { 440 return mSnapshot->region; 441 } 442 443 /** 444 * Indicates whether rendering is currently targeted at a layer. 445 */ 446 virtual bool hasLayer() const { 447 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 448 } 449 450 /** 451 * Returns the name of the FBO this renderer is rendering into. 452 */ 453 virtual GLint getTargetFbo() const { 454 return 0; 455 } 456 457 /** 458 * Renders the specified layer as a textured quad. 459 * 460 * @param layer The layer to render 461 * @param rect The bounds of the layer 462 */ 463 void drawTextureLayer(Layer* layer, const Rect& rect); 464 465 /** 466 * Gets the alpha and xfermode out of a paint object. If the paint is null 467 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 468 * snapshot alpha, and overrideLayerAlpha 469 * 470 * @param paint The paint to extract values from 471 * @param alpha Where to store the resulting alpha 472 * @param mode Where to store the resulting xfermode 473 */ 474 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 475 476 /** 477 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 478 * 479 * @param layer The layer from which the alpha is extracted 480 */ 481 inline float getLayerAlpha(Layer* layer) const; 482 483 /** 484 * Safely retrieves the mode from the specified xfermode. If the specified 485 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 486 */ 487 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 488 SkXfermode::Mode resultMode; 489 if (!SkXfermode::AsMode(mode, &resultMode)) { 490 resultMode = SkXfermode::kSrcOver_Mode; 491 } 492 return resultMode; 493 } 494 495 /** 496 * Set to true to suppress error checks at the end of a frame. 497 */ 498 virtual bool suppressErrorChecks() const { 499 return false; 500 } 501 502private: 503 /** 504 * Discards the content of the framebuffer if supported by the driver. 505 * This method should be called at the beginning of a frame to optimize 506 * rendering on some tiler architectures. 507 */ 508 void discardFramebuffer(float left, float top, float right, float bottom); 509 510 /** 511 * Ensures the state of the renderer is the same as the state of 512 * the GL context. 513 */ 514 void syncState(); 515 516 /** 517 * Tells the GPU what part of the screen is about to be redrawn. 518 * This method will use the clip rect that we started drawing the 519 * frame with. 520 * This method needs to be invoked every time getTargetFbo() is 521 * bound again. 522 */ 523 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 524 525 /** 526 * Tells the GPU what part of the screen is about to be redrawn. 527 * This method needs to be invoked every time getTargetFbo() is 528 * bound again. 529 */ 530 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 531 532 /** 533 * Tells the GPU that we are done drawing the frame or that we 534 * are switching to another render target. 535 */ 536 void endTiling(); 537 538 /** 539 * Saves the current state of the renderer as a new snapshot. 540 * The new snapshot is saved in mSnapshot and the previous snapshot 541 * is linked from mSnapshot->previous. 542 * 543 * @param flags The save flags; see SkCanvas for more information 544 * 545 * @return The new save count. This value can be passed to #restoreToCount() 546 */ 547 int saveSnapshot(int flags); 548 549 /** 550 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 551 * 552 * @return True if the clip was modified. 553 */ 554 bool restoreSnapshot(); 555 556 /** 557 * Sets the clipping rectangle using glScissor. The clip is defined by 558 * the current snapshot's clipRect member. 559 */ 560 void setScissorFromClip(); 561 562 /** 563 * Sets the clipping region using the stencil buffer. The clip region 564 * is defined by the current snapshot's clipRegion member. 565 */ 566 void setStencilFromClip(); 567 568 /** 569 * Given the local bounds of the layer, calculates ... 570 */ 571 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 572 573 /** 574 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 575 */ 576 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 577 bool fboLayer, int alpha); 578 579 /** 580 * Creates a new layer stored in the specified snapshot. 581 * 582 * @param snapshot The snapshot associated with the new layer 583 * @param left The left coordinate of the layer 584 * @param top The top coordinate of the layer 585 * @param right The right coordinate of the layer 586 * @param bottom The bottom coordinate of the layer 587 * @param alpha The translucency of the layer 588 * @param mode The blending mode of the layer 589 * @param flags The layer save flags 590 * 591 * @return True if the layer was successfully created, false otherwise 592 */ 593 bool createLayer(float left, float top, float right, float bottom, 594 int alpha, SkXfermode::Mode mode, int flags); 595 596 /** 597 * Creates a new layer stored in the specified snapshot as an FBO. 598 * 599 * @param layer The layer to store as an FBO 600 * @param snapshot The snapshot associated with the new layer 601 * @param bounds The bounds of the layer 602 */ 603 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 604 605 /** 606 * Compose the specified layer as a region. 607 * 608 * @param layer The layer to compose 609 * @param rect The layer's bounds 610 */ 611 void composeLayerRegion(Layer* layer, const Rect& rect); 612 613 /** 614 * Compose the specified layer as a simple rectangle. 615 * 616 * @param layer The layer to compose 617 * @param rect The layer's bounds 618 * @param swap If true, the source and destination are swapped 619 */ 620 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 621 622 /** 623 * Clears all the regions corresponding to the current list of layers. 624 * This method MUST be invoked before any drawing operation. 625 */ 626 void clearLayerRegions(); 627 628 /** 629 * Mark the layer as dirty at the specified coordinates. The coordinates 630 * are transformed with the supplied matrix. 631 */ 632 void dirtyLayer(const float left, const float top, 633 const float right, const float bottom, const mat4 transform); 634 635 /** 636 * Mark the layer as dirty at the specified coordinates. 637 */ 638 void dirtyLayer(const float left, const float top, 639 const float right, const float bottom); 640 641 /** 642 * Draws a colored rectangle with the specified color. The specified coordinates 643 * are transformed by the current snapshot's transform matrix unless specified 644 * otherwise. 645 * 646 * @param left The left coordinate of the rectangle 647 * @param top The top coordinate of the rectangle 648 * @param right The right coordinate of the rectangle 649 * @param bottom The bottom coordinate of the rectangle 650 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 651 * @param mode The Skia xfermode to use 652 * @param ignoreTransform True if the current transform should be ignored 653 */ 654 void drawColorRect(float left, float top, float right, float bottom, 655 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 656 657 /** 658 * Draws a series of colored rectangles with the specified color. The specified 659 * coordinates are transformed by the current snapshot's transform matrix unless 660 * specified otherwise. 661 * 662 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 663 * per rectangle 664 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 665 * @param mode The Skia xfermode to use 666 * @param ignoreTransform True if the current transform should be ignored 667 * @param dirty True if calling this method should dirty the current layer 668 * @param clip True if the rects should be clipped, false otherwise 669 */ 670 status_t drawColorRects(const float* rects, int count, int color, 671 SkXfermode::Mode mode, bool ignoreTransform = false, 672 bool dirty = true, bool clip = true); 673 674 /** 675 * Draws the shape represented by the specified path texture. 676 * This method invokes drawPathTexture() but takes into account 677 * the extra left/top offset and the texture offset to correctly 678 * position the final shape. 679 * 680 * @param left The left coordinate of the shape to render 681 * @param top The top coordinate of the shape to render 682 * @param texture The texture reprsenting the shape 683 * @param paint The paint to draw the shape with 684 */ 685 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 686 687 /** 688 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 689 * different compositing rules. 690 * 691 * @param texture The texture to draw with 692 * @param left The x coordinate of the bitmap 693 * @param top The y coordinate of the bitmap 694 * @param paint The paint to render with 695 */ 696 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 697 698 /** 699 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 700 * 701 * @param vertexBuffer The VertexBuffer to be drawn 702 * @param paint The paint to render with 703 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 704 */ 705 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 706 bool useOffset = false); 707 708 /** 709 * Renders the convex hull defined by the specified path as a strip of polygons. 710 * 711 * @param path The hull of the path to draw 712 * @param paint The paint to render with 713 */ 714 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 715 716 /** 717 * Draws a textured rectangle with the specified texture. The specified coordinates 718 * are transformed by the current snapshot's transform matrix. 719 * 720 * @param left The left coordinate of the rectangle 721 * @param top The top coordinate of the rectangle 722 * @param right The right coordinate of the rectangle 723 * @param bottom The bottom coordinate of the rectangle 724 * @param texture The texture name to map onto the rectangle 725 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 726 * @param mode The blending mode 727 * @param blend True if the texture contains an alpha channel 728 */ 729 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 730 float alpha, SkXfermode::Mode mode, bool blend); 731 732 /** 733 * Draws a textured rectangle with the specified texture. The specified coordinates 734 * are transformed by the current snapshot's transform matrix. 735 * 736 * @param left The left coordinate of the rectangle 737 * @param top The top coordinate of the rectangle 738 * @param right The right coordinate of the rectangle 739 * @param bottom The bottom coordinate of the rectangle 740 * @param texture The texture to use 741 * @param paint The paint containing the alpha, blending mode, etc. 742 */ 743 void drawTextureRect(float left, float top, float right, float bottom, 744 Texture* texture, SkPaint* paint); 745 746 /** 747 * Draws a textured mesh with the specified texture. If the indices are omitted, 748 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 749 * VBO is bound. 750 * 751 * @param left The left coordinate of the rectangle 752 * @param top The top coordinate of the rectangle 753 * @param right The right coordinate of the rectangle 754 * @param bottom The bottom coordinate of the rectangle 755 * @param texture The texture name to map onto the rectangle 756 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 757 * @param mode The blending mode 758 * @param blend True if the texture contains an alpha channel 759 * @param vertices The vertices that define the mesh 760 * @param texCoords The texture coordinates of each vertex 761 * @param elementsCount The number of elements in the mesh, required by indices 762 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 763 * @param ignoreTransform True if the current transform should be ignored 764 * @param vbo The VBO used to draw the mesh 765 * @param modelViewMode Defines whether the model view matrix should be scaled 766 * @param dirty True if calling this method should dirty the current layer 767 */ 768 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 769 float alpha, SkXfermode::Mode mode, bool blend, 770 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 771 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 772 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 773 774 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 775 float alpha, SkXfermode::Mode mode, bool blend, 776 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 777 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 778 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 779 780 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 781 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 782 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 783 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 784 bool dirty = true); 785 786 /** 787 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 788 * If the number of vertices to draw exceeds the number of indices we have 789 * pre-allocated, this method will generate several glDrawElements() calls. 790 */ 791 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 792 793 /** 794 * Draws text underline and strike-through if needed. 795 * 796 * @param text The text to decor 797 * @param bytesCount The number of bytes in the text 798 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 799 * @param x The x coordinate where the text will be drawn 800 * @param y The y coordinate where the text will be drawn 801 * @param paint The paint to draw the text with 802 */ 803 void drawTextDecorations(float totalAdvance, float x, float y, SkPaint* paint); 804 805 /** 806 * Draws shadow layer on text (with optional positions). 807 * 808 * @param paint The paint to draw the shadow with 809 * @param text The text to draw 810 * @param bytesCount The number of bytes in the text 811 * @param count The number of glyphs in the text 812 * @param positions The x, y positions of individual glyphs (or NULL) 813 * @param fontRenderer The font renderer object 814 * @param alpha The alpha value for drawing the shadow 815 * @param mode The xfermode for drawing the shadow 816 * @param x The x coordinate where the shadow will be drawn 817 * @param y The y coordinate where the shadow will be drawn 818 */ 819 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 820 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 821 float x, float y); 822 823 /** 824 * Draws a path texture. Path textures are alpha8 bitmaps that need special 825 * compositing to apply colors/filters/etc. 826 * 827 * @param texture The texture to render 828 * @param x The x coordinate where the texture will be drawn 829 * @param y The y coordinate where the texture will be drawn 830 * @param paint The paint to draw the texture with 831 */ 832 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 833 834 /** 835 * Resets the texture coordinates stored in mMeshVertices. Setting the values 836 * back to default is achieved by calling: 837 * 838 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 839 * 840 * @param u1 The left coordinate of the texture 841 * @param v1 The bottom coordinate of the texture 842 * @param u2 The right coordinate of the texture 843 * @param v2 The top coordinate of the texture 844 */ 845 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 846 847 /** 848 * Returns true if the specified paint will draw invisible text. 849 */ 850 bool canSkipText(const SkPaint* paint) const; 851 852 /** 853 * Binds the specified texture. The texture unit must have been selected 854 * prior to calling this method. 855 */ 856 inline void bindTexture(GLuint texture) { 857 mCaches.bindTexture(texture); 858 } 859 860 /** 861 * Binds the specified EGLImage texture. The texture unit must have been selected 862 * prior to calling this method. 863 */ 864 inline void bindExternalTexture(GLuint texture) { 865 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 866 } 867 868 /** 869 * Enable or disable blending as necessary. This function sets the appropriate 870 * blend function based on the specified xfermode. 871 */ 872 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 873 bool swapSrcDst = false); 874 875 /** 876 * Use the specified program with the current GL context. If the program is already 877 * in use, it will not be bound again. If it is not in use, the current program is 878 * marked unused and the specified program becomes used and becomes the new 879 * current program. 880 * 881 * @param program The program to use 882 * 883 * @return true If the specified program was already in use, false otherwise. 884 */ 885 inline bool useProgram(Program* program); 886 887 /** 888 * Invoked before any drawing operation. This sets required state. 889 */ 890 void setupDraw(bool clear = true); 891 892 /** 893 * Various methods to setup OpenGL rendering. 894 */ 895 void setupDrawWithTexture(bool isAlpha8 = false); 896 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 897 void setupDrawWithExternalTexture(); 898 void setupDrawNoTexture(); 899 void setupDrawAA(); 900 void setupDrawColor(int color, int alpha); 901 void setupDrawColor(float r, float g, float b, float a); 902 void setupDrawAlpha8Color(int color, int alpha); 903 void setupDrawTextGamma(const SkPaint* paint); 904 void setupDrawShader(); 905 void setupDrawColorFilter(); 906 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 907 bool swapSrcDst = false); 908 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 909 bool swapSrcDst = false); 910 void setupDrawProgram(); 911 void setupDrawDirtyRegionsDisabled(); 912 913 /** 914 * Setup the current program matrices based upon the nature of the geometry. 915 * 916 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 917 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 918 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 919 * transformations are stored in the modelView matrix and uploaded to the shader. 920 * 921 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 922 * geometry pixel positioning. See Vertex::gGeometryFudgeFactor. 923 * 924 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 925 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 926 * or when simple translation has been extracted) 927 */ 928 void setupDrawModelView(ModelViewMode mode, bool offset, 929 float left, float top, float right, float bottom, bool ignoreTransform = false); 930 void setupDrawColorUniforms(); 931 void setupDrawPureColorUniforms(); 932 void setupDrawShaderUniforms(bool ignoreTransform = false); 933 void setupDrawColorFilterUniforms(); 934 void setupDrawSimpleMesh(); 935 void setupDrawTexture(GLuint texture); 936 void setupDrawExternalTexture(GLuint texture); 937 void setupDrawTextureTransform(); 938 void setupDrawTextureTransformUniforms(mat4& transform); 939 void setupDrawTextGammaUniforms(); 940 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 941 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 942 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords, GLuint vbo = 0); 943 void setupDrawIndexedVertices(GLvoid* vertices); 944 void accountForClear(SkXfermode::Mode mode); 945 946 bool updateLayer(Layer* layer, bool inFrame); 947 void updateLayers(); 948 void flushLayers(); 949 950#if DEBUG_LAYERS_AS_REGIONS 951 /** 952 * Renders the specified region as a series of rectangles. This method 953 * is used for debugging only. 954 */ 955 void drawRegionRectsDebug(const Region& region); 956#endif 957 958 /** 959 * Renders the specified region as a series of rectangles. The region 960 * must be in screen-space coordinates. 961 */ 962 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 963 bool dirty = false); 964 965 /** 966 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 967 * is turned on. 968 */ 969 void debugClip(); 970 971 void debugOverdraw(bool enable, bool clear); 972 void renderOverdraw(); 973 void countOverdraw(); 974 975 /** 976 * Should be invoked every time the glScissor is modified. 977 */ 978 inline void dirtyClip() { 979 mDirtyClip = true; 980 } 981 982 inline mat4& currentTransform() const { 983 return *mSnapshot->transform; 984 } 985 986 inline const UvMapper& getMapper(const Texture* texture) { 987 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 988 } 989 990 /** 991 * Returns a texture object for the specified bitmap. The texture can 992 * come from the texture cache or an atlas. If this method returns 993 * NULL, the texture could not be found and/or allocated. 994 */ 995 Texture* getTexture(SkBitmap* bitmap); 996 997 // Dimensions of the drawing surface 998 int mWidth, mHeight; 999 1000 // Matrix used for view/projection in shaders 1001 mat4 mViewProjMatrix; 1002 1003 /** 1004 * Model-view matrix used to position/size objects 1005 * 1006 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 1007 * currentTransform(). 1008 * 1009 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 1010 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 1011 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 1012 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 1013 * bitmap. 1014 * 1015 * Used as input to SkiaShader transformation. 1016 */ 1017 mat4 mModelView; 1018 1019 // Number of saved states 1020 int mSaveCount; 1021 // Base state 1022 sp<Snapshot> mFirstSnapshot; 1023 // Current state 1024 sp<Snapshot> mSnapshot; 1025 // State used to define the clipping region 1026 Rect mTilingClip; 1027 // Is the target render surface opaque 1028 bool mOpaque; 1029 // Is a frame currently being rendered 1030 bool mFrameStarted; 1031 1032 // Used to draw textured quads 1033 TextureVertex mMeshVertices[4]; 1034 1035 // Default UV mapper 1036 const UvMapper mUvMapper; 1037 1038 // shader, filters, and shadow 1039 DrawModifiers mDrawModifiers; 1040 SkPaint mFilteredPaint; 1041 1042 // Various caches 1043 Caches& mCaches; 1044 Extensions& mExtensions; 1045 1046 // List of rectangles to clear after saveLayer() is invoked 1047 Vector<Rect*> mLayers; 1048 // List of functors to invoke after a frame is drawn 1049 SortedVector<Functor*> mFunctors; 1050 // List of layers to update at the beginning of a frame 1051 Vector<Layer*> mLayerUpdates; 1052 1053 // Indicates whether the clip must be restored 1054 bool mDirtyClip; 1055 1056 // The following fields are used to setup drawing 1057 // Used to describe the shaders to generate 1058 ProgramDescription mDescription; 1059 // Color description 1060 bool mColorSet; 1061 float mColorA, mColorR, mColorG, mColorB; 1062 // Indicates that the shader should get a color 1063 bool mSetShaderColor; 1064 // Current texture unit 1065 GLuint mTextureUnit; 1066 // Track dirty regions, true by default 1067 bool mTrackDirtyRegions; 1068 // Indicate whether we are drawing an opaque frame 1069 bool mOpaqueFrame; 1070 1071 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1072 // Properties.h 1073 bool mScissorOptimizationDisabled; 1074 1075 // No-ops start/endTiling when set 1076 bool mSuppressTiling; 1077 1078 // If true, this renderer will setup drawing to emulate 1079 // an increment stencil buffer in the color buffer 1080 bool mCountOverdraw; 1081 float mOverdraw; 1082 1083 friend class DisplayListRenderer; 1084 friend class Layer; 1085 friend class TextSetupFunctor; 1086 friend class DrawBitmapOp; 1087 friend class DrawPatchOp; 1088 1089}; // class OpenGLRenderer 1090 1091}; // namespace uirenderer 1092}; // namespace android 1093 1094#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1095