OpenGLRenderer.h revision 14e513058ed4168c94e015638d16f5f87fd8063a
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 "StatefulBaseRenderer.h" 46#include "SkiaColorFilter.h" 47#include "Snapshot.h" 48#include "UvMapper.h" 49#include "Vertex.h" 50#include "Caches.h" 51 52namespace android { 53namespace uirenderer { 54 55class DeferredDisplayState; 56class DisplayList; 57class TextSetupFunctor; 58class VertexBuffer; 59class SkiaShader; 60 61struct DrawModifiers { 62 DrawModifiers() { 63 reset(); 64 } 65 66 void reset() { 67 memset(this, 0, sizeof(DrawModifiers)); 68 } 69 70 SkiaShader* mShader; 71 SkiaColorFilter* mColorFilter; 72 float mOverrideLayerAlpha; 73 74 // Drop shadow 75 bool mHasShadow; 76 float mShadowRadius; 77 float mShadowDx; 78 float mShadowDy; 79 int mShadowColor; 80 81 // Draw filters 82 bool mHasDrawFilter; 83 int mPaintFilterClearBits; 84 int mPaintFilterSetBits; 85}; 86 87enum StateDeferFlags { 88 kStateDeferFlag_Draw = 0x1, 89 kStateDeferFlag_Clip = 0x2 90}; 91 92enum ClipSideFlags { 93 kClipSide_None = 0x0, 94 kClipSide_Left = 0x1, 95 kClipSide_Top = 0x2, 96 kClipSide_Right = 0x4, 97 kClipSide_Bottom = 0x8, 98 kClipSide_Full = 0xF, 99 kClipSide_ConservativeFull = 0x1F 100}; 101 102/** 103 * Defines additional transformation that should be applied by the model view matrix, beyond that of 104 * the currentTransform() 105 */ 106enum ModelViewMode { 107 /** 108 * Used when the model view should simply translate geometry passed to the shader. The resulting 109 * matrix will be a simple translation. 110 */ 111 kModelViewMode_Translate = 0, 112 113 /** 114 * Used when the model view should translate and scale geometry. The resulting matrix will be a 115 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 116 */ 117 kModelViewMode_TranslateAndScale = 1, 118}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public StatefulBaseRenderer { 127public: 128 ANDROID_API OpenGLRenderer(); 129 virtual ~OpenGLRenderer(); 130 131 ANDROID_API void initProperties(); 132 133 virtual void setViewport(int width, int height); 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 ANDROID_API status_t invokeFunctors(Rect& dirty); 148 ANDROID_API void detachFunctor(Functor* functor); 149 ANDROID_API void attachFunctor(Functor* functor); 150 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 151 152 ANDROID_API void pushLayerUpdate(Layer* layer); 153 ANDROID_API void cancelLayerUpdate(Layer* layer); 154 ANDROID_API void clearLayerUpdates(); 155 ANDROID_API void flushLayerUpdates(); 156 157 ANDROID_API int saveLayer(float left, float top, float right, float bottom, 158 SkPaint* paint, int flags) { 159 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; 160 if (paint) mode = getXfermode(paint->getXfermode()); 161 return saveLayer(left, top, right, bottom, paint ? paint->getAlpha() : 255, mode, flags); 162 } 163 ANDROID_API int saveLayerAlpha(float left, float top, float right, float bottom, 164 int alpha, int flags) { 165 return saveLayer(left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 166 } 167 virtual int saveLayer(float left, float top, float right, float bottom, 168 int alpha, SkXfermode::Mode mode, int flags); 169 170 int saveLayerDeferred(float left, float top, float right, float bottom, 171 int alpha, SkXfermode::Mode mode, int flags); 172 173 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 174 virtual bool clipPath(SkPath* path, SkRegion::Op op); 175 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 176 177 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags); 178 virtual status_t drawLayer(Layer* layer, float x, float y); 179 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 180 status_t drawBitmaps(SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 181 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, SkPaint* paint); 182 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 183 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 184 float srcRight, float srcBottom, float dstLeft, float dstTop, 185 float dstRight, float dstBottom, SkPaint* paint); 186 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 187 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 188 float* vertices, int* colors, SkPaint* paint); 189 status_t drawPatches(SkBitmap* bitmap, AssetAtlas::Entry* entry, 190 TextureVertex* vertices, uint32_t indexCount, SkPaint* paint); 191 virtual status_t drawPatch(SkBitmap* bitmap, Res_png_9patch* patch, 192 float left, float top, float right, float bottom, SkPaint* paint); 193 status_t drawPatch(SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 194 float left, float top, float right, float bottom, SkPaint* paint); 195 virtual status_t drawColor(int color, SkXfermode::Mode mode); 196 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 197 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 198 float rx, float ry, SkPaint* paint); 199 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 200 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 201 virtual status_t drawArc(float left, float top, float right, float bottom, 202 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 203 virtual status_t drawPath(SkPath* path, SkPaint* paint); 204 virtual status_t drawLines(float* points, int count, SkPaint* paint); 205 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 206 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 207 float hOffset, float vOffset, SkPaint* paint); 208 virtual status_t drawPosText(const char* text, int bytesCount, int count, 209 const float* positions, SkPaint* paint); 210 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 211 const float* positions, SkPaint* paint, float totalAdvance, const Rect& bounds, 212 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 213 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 214 215 status_t drawShadow(const mat4& casterTransform, float casterAlpha, 216 float width, float height); 217 218 virtual void resetShader(); 219 virtual void setupShader(SkiaShader* shader); 220 221 virtual void resetColorFilter(); 222 virtual void setupColorFilter(SkiaColorFilter* filter); 223 224 virtual void resetShadow(); 225 virtual void setupShadow(float radius, float dx, float dy, int color); 226 227 virtual void resetPaintFilter(); 228 virtual void setupPaintFilter(int clearBits, int setBits); 229 230 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 231 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 232 233 SkPaint* filterPaint(SkPaint* paint); 234 235 /** 236 * Store the current display state (most importantly, the current clip and transform), and 237 * additionally map the state's bounds from local to window coordinates. 238 * 239 * Returns true if quick-rejected 240 */ 241 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 242 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 243 void setupMergedMultiDraw(const Rect* clipRect); 244 245 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 246 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 247 248 ANDROID_API bool isCurrentTransformSimple() { 249 return currentTransform().isSimple(); 250 } 251 252 Caches& getCaches() { 253 return mCaches; 254 } 255 256 // simple rect clip 257 bool isCurrentClipSimple() { 258 return mSnapshot->clipRegion->isEmpty(); 259 } 260 261 int getViewportWidth() { return getSnapshot()->viewport.getWidth(); } 262 int getViewportHeight() { return getSnapshot()->viewport.getHeight(); } 263 264 /** 265 * Scales the alpha on the current snapshot. This alpha value will be modulated 266 * with other alpha values when drawing primitives. 267 */ 268 void scaleAlpha(float alpha) { 269 mSnapshot->alpha *= alpha; 270 } 271 272 /** 273 * Inserts a named event marker in the stream of GL commands. 274 */ 275 void eventMark(const char* name) const; 276 277 /** 278 * Inserts a named group marker in the stream of GL commands. This marker 279 * can be used by tools to group commands into logical groups. A call to 280 * this method must always be followed later on by a call to endMark(). 281 */ 282 void startMark(const char* name) const; 283 284 /** 285 * Closes the last group marker opened by startMark(). 286 */ 287 void endMark() const; 288 289 /** 290 * Gets the alpha and xfermode out of a paint object. If the paint is null 291 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 292 * not multiply the paint's alpha by the current snapshot's alpha, and does 293 * not replace the alpha with the overrideLayerAlpha 294 * 295 * @param paint The paint to extract values from 296 * @param alpha Where to store the resulting alpha 297 * @param mode Where to store the resulting xfermode 298 */ 299 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 300 *mode = getXfermodeDirect(paint); 301 *alpha = getAlphaDirect(paint); 302 } 303 304 static inline SkXfermode::Mode getXfermodeDirect(SkPaint* paint) { 305 if (!paint) return SkXfermode::kSrcOver_Mode; 306 return getXfermode(paint->getXfermode()); 307 } 308 309 static inline int getAlphaDirect(const SkPaint* paint) { 310 if (!paint) return 255; 311 return paint->getAlpha(); 312 } 313 314 /** 315 * Return the best transform to use to rasterize text given a full 316 * transform matrix. 317 */ 318 mat4 findBestFontTransform(const mat4& transform) const; 319 320#if DEBUG_MERGE_BEHAVIOR 321 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 322 mCaches.setScissorEnabled(false); 323 324 // should only be called outside of other draw ops, so stencil can only be in test state 325 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 326 mCaches.stencil.disable(); 327 328 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 329 330 if (stencilWasEnabled) mCaches.stencil.enableTest(); 331 } 332#endif 333 334protected: 335 /** 336 * Computes the projection matrix, initialize the first snapshot 337 * and stores the dimensions of the render target. 338 */ 339 void initViewport(int width, int height); 340 341 /** 342 * Perform the setup specific to a frame. This method does not 343 * issue any OpenGL commands. 344 */ 345 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 346 347 /** 348 * Indicates the start of rendering. This method will setup the 349 * initial OpenGL state (viewport, clearing the buffer, etc.) 350 */ 351 status_t startFrame(); 352 353 /** 354 * Clears the underlying surface if needed. 355 */ 356 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 357 358 /** 359 * Call this method after updating a layer during a drawing pass. 360 */ 361 void resumeAfterLayer(); 362 363 /** 364 * This method is called whenever a stencil buffer is required. Subclasses 365 * should override this method and call attachStencilBufferToLayer() on the 366 * appropriate layer(s). 367 */ 368 virtual void ensureStencilBuffer(); 369 370 /** 371 * Obtains a stencil render buffer (allocating it if necessary) and 372 * attaches it to the specified layer. 373 */ 374 void attachStencilBufferToLayer(Layer* layer); 375 376 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 377 SkPaint* paint = NULL); 378 bool quickRejectSetupScissor(const Rect& bounds, SkPaint* paint = NULL) { 379 return quickRejectSetupScissor(bounds.left, bounds.top, 380 bounds.right, bounds.bottom, paint); 381 } 382 383 /** 384 * Compose the layer defined in the current snapshot with the layer 385 * defined by the previous snapshot. 386 * 387 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 388 * 389 * @param curent The current snapshot containing the layer to compose 390 * @param previous The previous snapshot to compose the current layer with 391 */ 392 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 393 394 /** 395 * Marks the specified region as dirty at the specified bounds. 396 */ 397 void dirtyLayerUnchecked(Rect& bounds, Region* region); 398 399 sp<Snapshot> getSnapshot() const { 400 return mSnapshot; 401 } 402 403 /** 404 * Returns the region of the current layer. 405 */ 406 virtual Region* getRegion() const { 407 return mSnapshot->region; 408 } 409 410 /** 411 * Indicates whether rendering is currently targeted at a layer. 412 */ 413 virtual bool hasLayer() const { 414 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 415 } 416 417 /** 418 * Returns the name of the FBO this renderer is rendering into. 419 */ 420 virtual GLuint getTargetFbo() const { 421 return 0; 422 } 423 424 /** 425 * Renders the specified layer as a textured quad. 426 * 427 * @param layer The layer to render 428 * @param rect The bounds of the layer 429 */ 430 void drawTextureLayer(Layer* layer, const Rect& rect); 431 432 /** 433 * Gets the alpha and xfermode out of a paint object. If the paint is null 434 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 435 * snapshot alpha, and overrideLayerAlpha 436 * 437 * @param paint The paint to extract values from 438 * @param alpha Where to store the resulting alpha 439 * @param mode Where to store the resulting xfermode 440 */ 441 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 442 443 /** 444 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 445 * 446 * @param layer The layer from which the alpha is extracted 447 */ 448 inline float getLayerAlpha(Layer* layer) const; 449 450 /** 451 * Safely retrieves the mode from the specified xfermode. If the specified 452 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 453 */ 454 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 455 SkXfermode::Mode resultMode; 456 if (!SkXfermode::AsMode(mode, &resultMode)) { 457 resultMode = SkXfermode::kSrcOver_Mode; 458 } 459 return resultMode; 460 } 461 462 /** 463 * Set to true to suppress error checks at the end of a frame. 464 */ 465 virtual bool suppressErrorChecks() const { 466 return false; 467 } 468 469private: 470 /** 471 * Discards the content of the framebuffer if supported by the driver. 472 * This method should be called at the beginning of a frame to optimize 473 * rendering on some tiler architectures. 474 */ 475 void discardFramebuffer(float left, float top, float right, float bottom); 476 477 /** 478 * Ensures the state of the renderer is the same as the state of 479 * the GL context. 480 */ 481 void syncState(); 482 483 /** 484 * Tells the GPU what part of the screen is about to be redrawn. 485 * This method will use the clip rect that we started drawing the 486 * frame with. 487 * This method needs to be invoked every time getTargetFbo() is 488 * bound again. 489 */ 490 void startTiling(const Snapshot& snapshot, bool opaque = false); 491 492 /** 493 * Tells the GPU what part of the screen is about to be redrawn. 494 * This method needs to be invoked every time getTargetFbo() is 495 * bound again. 496 */ 497 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 498 499 /** 500 * Tells the GPU that we are done drawing the frame or that we 501 * are switching to another render target. 502 */ 503 void endTiling(); 504 505 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 506 507 /** 508 * Sets the clipping rectangle using glScissor. The clip is defined by 509 * the current snapshot's clipRect member. 510 */ 511 void setScissorFromClip(); 512 513 /** 514 * Sets the clipping region using the stencil buffer. The clip region 515 * is defined by the current snapshot's clipRegion member. 516 */ 517 void setStencilFromClip(); 518 519 /** 520 * Given the local bounds of the layer, calculates ... 521 */ 522 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 523 524 /** 525 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 526 */ 527 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 528 bool fboLayer, int alpha); 529 530 /** 531 * Creates a new layer stored in the specified snapshot. 532 * 533 * @param snapshot The snapshot associated with the new layer 534 * @param left The left coordinate of the layer 535 * @param top The top coordinate of the layer 536 * @param right The right coordinate of the layer 537 * @param bottom The bottom coordinate of the layer 538 * @param alpha The translucency of the layer 539 * @param mode The blending mode of the layer 540 * @param flags The layer save flags 541 * 542 * @return True if the layer was successfully created, false otherwise 543 */ 544 bool createLayer(float left, float top, float right, float bottom, 545 int alpha, SkXfermode::Mode mode, int flags); 546 547 /** 548 * Creates a new layer stored in the specified snapshot as an FBO. 549 * 550 * @param layer The layer to store as an FBO 551 * @param snapshot The snapshot associated with the new layer 552 * @param bounds The bounds of the layer 553 */ 554 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 555 556 /** 557 * Compose the specified layer as a region. 558 * 559 * @param layer The layer to compose 560 * @param rect The layer's bounds 561 */ 562 void composeLayerRegion(Layer* layer, const Rect& rect); 563 564 /** 565 * Compose the specified layer as a simple rectangle. 566 * 567 * @param layer The layer to compose 568 * @param rect The layer's bounds 569 * @param swap If true, the source and destination are swapped 570 */ 571 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 572 573 /** 574 * Clears all the regions corresponding to the current list of layers. 575 * This method MUST be invoked before any drawing operation. 576 */ 577 void clearLayerRegions(); 578 579 /** 580 * Mark the layer as dirty at the specified coordinates. The coordinates 581 * are transformed with the supplied matrix. 582 */ 583 void dirtyLayer(const float left, const float top, 584 const float right, const float bottom, const mat4 transform); 585 586 /** 587 * Mark the layer as dirty at the specified coordinates. 588 */ 589 void dirtyLayer(const float left, const float top, 590 const float right, const float bottom); 591 592 /** 593 * Draws a colored rectangle with the specified color. The specified coordinates 594 * are transformed by the current snapshot's transform matrix unless specified 595 * otherwise. 596 * 597 * @param left The left coordinate of the rectangle 598 * @param top The top coordinate of the rectangle 599 * @param right The right coordinate of the rectangle 600 * @param bottom The bottom coordinate of the rectangle 601 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 602 * @param mode The Skia xfermode to use 603 * @param ignoreTransform True if the current transform should be ignored 604 */ 605 void drawColorRect(float left, float top, float right, float bottom, 606 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 607 608 /** 609 * Draws a series of colored rectangles with the specified color. The specified 610 * coordinates are transformed by the current snapshot's transform matrix unless 611 * specified otherwise. 612 * 613 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 614 * per rectangle 615 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 616 * @param mode The Skia xfermode to use 617 * @param ignoreTransform True if the current transform should be ignored 618 * @param dirty True if calling this method should dirty the current layer 619 * @param clip True if the rects should be clipped, false otherwise 620 */ 621 status_t drawColorRects(const float* rects, int count, int color, 622 SkXfermode::Mode mode, bool ignoreTransform = false, 623 bool dirty = true, bool clip = true); 624 625 /** 626 * Draws the shape represented by the specified path texture. 627 * This method invokes drawPathTexture() but takes into account 628 * the extra left/top offset and the texture offset to correctly 629 * position the final shape. 630 * 631 * @param left The left coordinate of the shape to render 632 * @param top The top coordinate of the shape to render 633 * @param texture The texture reprsenting the shape 634 * @param paint The paint to draw the shape with 635 */ 636 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 637 638 /** 639 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 640 * different compositing rules. 641 * 642 * @param texture The texture to draw with 643 * @param left The x coordinate of the bitmap 644 * @param top The y coordinate of the bitmap 645 * @param paint The paint to render with 646 */ 647 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 648 649 /** 650 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 651 * 652 * @param vertexBuffer The VertexBuffer to be drawn 653 * @param paint The paint to render with 654 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 655 */ 656 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 657 bool useOffset = false); 658 659 /** 660 * Renders the convex hull defined by the specified path as a strip of polygons. 661 * 662 * @param path The hull of the path to draw 663 * @param paint The paint to render with 664 */ 665 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 666 667 /** 668 * Draws a textured rectangle with the specified texture. The specified coordinates 669 * are transformed by the current snapshot's transform matrix. 670 * 671 * @param left The left coordinate of the rectangle 672 * @param top The top coordinate of the rectangle 673 * @param right The right coordinate of the rectangle 674 * @param bottom The bottom coordinate of the rectangle 675 * @param texture The texture name to map onto the rectangle 676 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 677 * @param mode The blending mode 678 * @param blend True if the texture contains an alpha channel 679 */ 680 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 681 float alpha, SkXfermode::Mode mode, bool blend); 682 683 /** 684 * Draws a textured rectangle with the specified texture. The specified coordinates 685 * are transformed by the current snapshot's transform matrix. 686 * 687 * @param left The left coordinate of the rectangle 688 * @param top The top coordinate of the rectangle 689 * @param right The right coordinate of the rectangle 690 * @param bottom The bottom coordinate of the rectangle 691 * @param texture The texture to use 692 * @param paint The paint containing the alpha, blending mode, etc. 693 */ 694 void drawTextureRect(float left, float top, float right, float bottom, 695 Texture* texture, SkPaint* paint); 696 697 /** 698 * Draws a textured mesh with the specified texture. If the indices are omitted, 699 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 700 * VBO is bound. 701 * 702 * @param left The left coordinate of the rectangle 703 * @param top The top coordinate of the rectangle 704 * @param right The right coordinate of the rectangle 705 * @param bottom The bottom coordinate of the rectangle 706 * @param texture The texture name to map onto the rectangle 707 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 708 * @param mode The blending mode 709 * @param blend True if the texture contains an alpha channel 710 * @param vertices The vertices that define the mesh 711 * @param texCoords The texture coordinates of each vertex 712 * @param elementsCount The number of elements in the mesh, required by indices 713 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 714 * @param ignoreTransform True if the current transform should be ignored 715 * @param vbo The VBO used to draw the mesh 716 * @param modelViewMode Defines whether the model view matrix should be scaled 717 * @param dirty True if calling this method should dirty the current layer 718 */ 719 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 720 float alpha, SkXfermode::Mode mode, bool blend, 721 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 722 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 723 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 724 725 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 726 float alpha, SkXfermode::Mode mode, bool blend, 727 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 728 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 729 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 730 731 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 732 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 733 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 734 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 735 bool dirty = true); 736 737 /** 738 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 739 * If the number of vertices to draw exceeds the number of indices we have 740 * pre-allocated, this method will generate several glDrawElements() calls. 741 */ 742 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 743 744 /** 745 * Draws text underline and strike-through if needed. 746 * 747 * @param text The text to decor 748 * @param bytesCount The number of bytes in the text 749 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 750 * @param x The x coordinate where the text will be drawn 751 * @param y The y coordinate where the text will be drawn 752 * @param paint The paint to draw the text with 753 */ 754 void drawTextDecorations(float totalAdvance, float x, float y, SkPaint* paint); 755 756 /** 757 * Draws shadow layer on text (with optional positions). 758 * 759 * @param paint The paint to draw the shadow with 760 * @param text The text to draw 761 * @param bytesCount The number of bytes in the text 762 * @param count The number of glyphs in the text 763 * @param positions The x, y positions of individual glyphs (or NULL) 764 * @param fontRenderer The font renderer object 765 * @param alpha The alpha value for drawing the shadow 766 * @param mode The xfermode for drawing the shadow 767 * @param x The x coordinate where the shadow will be drawn 768 * @param y The y coordinate where the shadow will be drawn 769 */ 770 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 771 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 772 float x, float y); 773 774 /** 775 * Draws a path texture. Path textures are alpha8 bitmaps that need special 776 * compositing to apply colors/filters/etc. 777 * 778 * @param texture The texture to render 779 * @param x The x coordinate where the texture will be drawn 780 * @param y The y coordinate where the texture will be drawn 781 * @param paint The paint to draw the texture with 782 */ 783 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 784 785 /** 786 * Resets the texture coordinates stored in mMeshVertices. Setting the values 787 * back to default is achieved by calling: 788 * 789 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 790 * 791 * @param u1 The left coordinate of the texture 792 * @param v1 The bottom coordinate of the texture 793 * @param u2 The right coordinate of the texture 794 * @param v2 The top coordinate of the texture 795 */ 796 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 797 798 /** 799 * Returns true if the specified paint will draw invisible text. 800 */ 801 bool canSkipText(const SkPaint* paint) const; 802 803 /** 804 * Binds the specified texture. The texture unit must have been selected 805 * prior to calling this method. 806 */ 807 inline void bindTexture(GLuint texture) { 808 mCaches.bindTexture(texture); 809 } 810 811 /** 812 * Binds the specified EGLImage texture. The texture unit must have been selected 813 * prior to calling this method. 814 */ 815 inline void bindExternalTexture(GLuint texture) { 816 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 817 } 818 819 /** 820 * Enable or disable blending as necessary. This function sets the appropriate 821 * blend function based on the specified xfermode. 822 */ 823 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 824 bool swapSrcDst = false); 825 826 /** 827 * Use the specified program with the current GL context. If the program is already 828 * in use, it will not be bound again. If it is not in use, the current program is 829 * marked unused and the specified program becomes used and becomes the new 830 * current program. 831 * 832 * @param program The program to use 833 * 834 * @return true If the specified program was already in use, false otherwise. 835 */ 836 inline bool useProgram(Program* program); 837 838 /** 839 * Invoked before any drawing operation. This sets required state. 840 */ 841 void setupDraw(bool clear = true); 842 843 /** 844 * Various methods to setup OpenGL rendering. 845 */ 846 void setupDrawWithTexture(bool isAlpha8 = false); 847 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 848 void setupDrawWithExternalTexture(); 849 void setupDrawNoTexture(); 850 void setupDrawAA(); 851 void setupDrawColor(int color, int alpha); 852 void setupDrawColor(float r, float g, float b, float a); 853 void setupDrawAlpha8Color(int color, int alpha); 854 void setupDrawTextGamma(const SkPaint* paint); 855 void setupDrawShader(); 856 void setupDrawColorFilter(); 857 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 858 bool swapSrcDst = false); 859 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 860 bool swapSrcDst = false); 861 void setupDrawProgram(); 862 void setupDrawDirtyRegionsDisabled(); 863 864 /** 865 * Setup the current program matrices based upon the nature of the geometry. 866 * 867 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 868 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 869 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 870 * transformations are stored in the modelView matrix and uploaded to the shader. 871 * 872 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 873 * geometry pixel positioning. See Vertex::gGeometryFudgeFactor. 874 * 875 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 876 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 877 * or when simple translation has been extracted) 878 */ 879 void setupDrawModelView(ModelViewMode mode, bool offset, 880 float left, float top, float right, float bottom, bool ignoreTransform = false); 881 void setupDrawColorUniforms(); 882 void setupDrawPureColorUniforms(); 883 void setupDrawShaderUniforms(bool ignoreTransform = false); 884 void setupDrawColorFilterUniforms(); 885 void setupDrawSimpleMesh(); 886 void setupDrawTexture(GLuint texture); 887 void setupDrawExternalTexture(GLuint texture); 888 void setupDrawTextureTransform(); 889 void setupDrawTextureTransformUniforms(mat4& transform); 890 void setupDrawTextGammaUniforms(); 891 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 892 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 893 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords, GLuint vbo = 0); 894 void setupDrawIndexedVertices(GLvoid* vertices); 895 void accountForClear(SkXfermode::Mode mode); 896 897 bool updateLayer(Layer* layer, bool inFrame); 898 void updateLayers(); 899 void flushLayers(); 900 901#if DEBUG_LAYERS_AS_REGIONS 902 /** 903 * Renders the specified region as a series of rectangles. This method 904 * is used for debugging only. 905 */ 906 void drawRegionRectsDebug(const Region& region); 907#endif 908 909 /** 910 * Renders the specified region as a series of rectangles. The region 911 * must be in screen-space coordinates. 912 */ 913 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 914 bool dirty = false); 915 916 /** 917 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 918 * is turned on. 919 */ 920 void debugClip(); 921 922 void debugOverdraw(bool enable, bool clear); 923 void renderOverdraw(); 924 void countOverdraw(); 925 926 /** 927 * Should be invoked every time the glScissor is modified. 928 */ 929 inline void dirtyClip() { 930 mDirtyClip = true; 931 } 932 933 inline const UvMapper& getMapper(const Texture* texture) { 934 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 935 } 936 937 /** 938 * Returns a texture object for the specified bitmap. The texture can 939 * come from the texture cache or an atlas. If this method returns 940 * NULL, the texture could not be found and/or allocated. 941 */ 942 Texture* getTexture(SkBitmap* bitmap); 943 944 // Matrix used for view/projection in shaders 945 mat4 mViewProjMatrix; 946 947 /** 948 * Model-view matrix used to position/size objects 949 * 950 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 951 * currentTransform(). 952 * 953 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 954 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 955 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 956 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 957 * bitmap. 958 * 959 * Used as input to SkiaShader transformation. 960 */ 961 mat4 mModelView; 962 963 // State used to define the clipping region 964 Rect mTilingClip; 965 // Is the target render surface opaque 966 bool mOpaque; 967 // Is a frame currently being rendered 968 bool mFrameStarted; 969 970 // Used to draw textured quads 971 TextureVertex mMeshVertices[4]; 972 973 // Default UV mapper 974 const UvMapper mUvMapper; 975 976 // shader, filters, and shadow 977 DrawModifiers mDrawModifiers; 978 SkPaint mFilteredPaint; 979 980 // Various caches 981 Caches& mCaches; 982 Extensions& mExtensions; 983 984 // List of rectangles to clear after saveLayer() is invoked 985 Vector<Rect*> mLayers; 986 // List of functors to invoke after a frame is drawn 987 SortedVector<Functor*> mFunctors; 988 // List of layers to update at the beginning of a frame 989 Vector<Layer*> mLayerUpdates; 990 991 // Indicates whether the clip must be restored 992 bool mDirtyClip; 993 994 // The following fields are used to setup drawing 995 // Used to describe the shaders to generate 996 ProgramDescription mDescription; 997 // Color description 998 bool mColorSet; 999 float mColorA, mColorR, mColorG, mColorB; 1000 // Indicates that the shader should get a color 1001 bool mSetShaderColor; 1002 // Current texture unit 1003 GLuint mTextureUnit; 1004 // Track dirty regions, true by default 1005 bool mTrackDirtyRegions; 1006 // Indicate whether we are drawing an opaque frame 1007 bool mOpaqueFrame; 1008 1009 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1010 // Properties.h 1011 bool mScissorOptimizationDisabled; 1012 1013 // No-ops start/endTiling when set 1014 bool mSuppressTiling; 1015 1016 // If true, this renderer will setup drawing to emulate 1017 // an increment stencil buffer in the color buffer 1018 bool mCountOverdraw; 1019 float mOverdraw; 1020 1021 friend class DisplayListRenderer; 1022 friend class Layer; 1023 friend class TextSetupFunctor; 1024 friend class DrawBitmapOp; 1025 friend class DrawPatchOp; 1026 1027}; // class OpenGLRenderer 1028 1029}; // namespace uirenderer 1030}; // namespace android 1031 1032#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1033