OpenGLRenderer.h revision d90144db52c7297879b950cbbc85137ed123ab5b
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 "Debug.h" 38#include "Extensions.h" 39#include "Matrix.h" 40#include "Program.h" 41#include "Rect.h" 42#include "Snapshot.h" 43#include "Vertex.h" 44#include "SkiaShader.h" 45#include "SkiaColorFilter.h" 46#include "Caches.h" 47 48namespace android { 49namespace uirenderer { 50 51struct DrawModifiers { 52 SkiaShader* mShader; 53 SkiaColorFilter* mColorFilter; 54 55 // Drop shadow 56 bool mHasShadow; 57 float mShadowRadius; 58 float mShadowDx; 59 float mShadowDy; 60 int mShadowColor; 61 62 // Draw filters 63 bool mHasDrawFilter; 64 int mPaintFilterClearBits; 65 int mPaintFilterSetBits; 66}; 67 68enum StateDeferFlags { 69 kStateDeferFlag_Draw = 0x1, 70 kStateDeferFlag_Clip = 0x2 71}; 72 73struct DeferredDisplayState { 74 Rect mBounds; // local bounds, mapped with matrix to be in screen space coordinates, clipped. 75 76 // the below are set and used by the OpenGLRenderer at record and deferred playback 77 Rect mClip; 78 mat4 mMatrix; 79 DrawModifiers mDrawModifiers; 80 float mAlpha; 81}; 82 83/////////////////////////////////////////////////////////////////////////////// 84// Renderer 85/////////////////////////////////////////////////////////////////////////////// 86 87class DisplayList; 88class VertexBuffer; 89 90/** 91 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 92 * simplified version of Skia's Canvas API. 93 */ 94class OpenGLRenderer { 95public: 96 ANDROID_API OpenGLRenderer(); 97 virtual ~OpenGLRenderer(); 98 99 /** 100 * Sets the name of this renderer. The name is optional and 101 * empty by default. If the pointer is null the name is set 102 * to the empty string. 103 */ 104 ANDROID_API void setName(const char* name); 105 106 /** 107 * Returns the name of this renderer as UTF8 string. 108 * The returned pointer is never null. 109 */ 110 ANDROID_API const char* getName() const; 111 112 /** 113 * Read externally defined properties to control the behavior 114 * of the renderer. 115 */ 116 ANDROID_API void initProperties(); 117 118 /** 119 * Indicates whether this renderer executes drawing commands immediately. 120 * If this method returns true, the drawing commands will be executed 121 * later. 122 */ 123 virtual bool isDeferred(); 124 125 /** 126 * Sets the dimension of the underlying drawing surface. This method must 127 * be called at least once every time the drawing surface changes size. 128 * 129 * @param width The width in pixels of the underlysing surface 130 * @param height The height in pixels of the underlysing surface 131 */ 132 virtual void setViewport(int width, int height); 133 134 /** 135 * Prepares the renderer to draw a frame. This method must be invoked 136 * at the beginning of each frame. When this method is invoked, the 137 * entire drawing surface is assumed to be redrawn. 138 * 139 * @param opaque If true, the target surface is considered opaque 140 * and will not be cleared. If false, the target surface 141 * will be cleared 142 */ 143 ANDROID_API status_t prepare(bool opaque); 144 145 /** 146 * Prepares the renderer to draw a frame. This method must be invoked 147 * at the beginning of each frame. Only the specified rectangle of the 148 * frame is assumed to be dirty. A clip will automatically be set to 149 * the specified rectangle. 150 * 151 * @param left The left coordinate of the dirty rectangle 152 * @param top The top coordinate of the dirty rectangle 153 * @param right The right coordinate of the dirty rectangle 154 * @param bottom The bottom coordinate of the dirty rectangle 155 * @param opaque If true, the target surface is considered opaque 156 * and will not be cleared. If false, the target surface 157 * will be cleared in the specified dirty rectangle 158 */ 159 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 160 161 /** 162 * Indicates the end of a frame. This method must be invoked whenever 163 * the caller is done rendering a frame. 164 */ 165 virtual void finish(); 166 167 /** 168 * This method must be invoked before handing control over to a draw functor. 169 * See callDrawGLFunction() for instance. 170 * 171 * This command must not be recorded inside display lists. 172 */ 173 virtual void interrupt(); 174 175 /** 176 * This method must be invoked after getting control back from a draw functor. 177 * 178 * This command must not be recorded inside display lists. 179 */ 180 virtual void resume(); 181 182 ANDROID_API status_t invokeFunctors(Rect& dirty); 183 ANDROID_API void detachFunctor(Functor* functor); 184 ANDROID_API void attachFunctor(Functor* functor); 185 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 186 187 ANDROID_API void pushLayerUpdate(Layer* layer); 188 ANDROID_API void clearLayerUpdates(); 189 190 ANDROID_API int getSaveCount() const; 191 virtual int save(int flags); 192 virtual void restore(); 193 virtual void restoreToCount(int saveCount); 194 195 ANDROID_API int saveLayer(float left, float top, float right, float bottom, 196 SkPaint* paint, int flags) { 197 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; 198 if (paint) mode = getXfermode(paint->getXfermode()); 199 return saveLayer(left, top, right, bottom, paint ? paint->getAlpha() : 255, mode, flags); 200 } 201 ANDROID_API int saveLayerAlpha(float left, float top, float right, float bottom, 202 int alpha, int flags) { 203 return saveLayer(left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 204 } 205 virtual int saveLayer(float left, float top, float right, float bottom, 206 int alpha, SkXfermode::Mode mode, int flags); 207 208 int saveLayerDeferred(float left, float top, float right, float bottom, 209 int alpha, SkXfermode::Mode mode, int flags); 210 211 virtual void translate(float dx, float dy); 212 virtual void rotate(float degrees); 213 virtual void scale(float sx, float sy); 214 virtual void skew(float sx, float sy); 215 216 bool hasRectToRectTransform(); 217 ANDROID_API void getMatrix(SkMatrix* matrix); 218 virtual void setMatrix(SkMatrix* matrix); 219 virtual void concatMatrix(SkMatrix* matrix); 220 221 ANDROID_API const Rect& getClipBounds(); 222 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 223 bool quickRejectNoScissor(float left, float top, float right, float bottom); 224 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 225 virtual bool clipPath(SkPath* path, SkRegion::Op op); 226 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 227 virtual Rect* getClipRect(); 228 229 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags); 230 virtual void outputDisplayList(DisplayList* displayList); 231 virtual status_t drawLayer(Layer* layer, float x, float y); 232 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 233 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 234 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 235 float srcRight, float srcBottom, float dstLeft, float dstTop, 236 float dstRight, float dstBottom, SkPaint* paint); 237 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 238 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 239 float* vertices, int* colors, SkPaint* paint); 240 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 241 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 242 float left, float top, float right, float bottom, SkPaint* paint); 243 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 244 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 245 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 246 virtual status_t drawColor(int color, SkXfermode::Mode mode); 247 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 248 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 249 float rx, float ry, SkPaint* paint); 250 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 251 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 252 virtual status_t drawArc(float left, float top, float right, float bottom, 253 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 254 virtual status_t drawPath(SkPath* path, SkPaint* paint); 255 virtual status_t drawLines(float* points, int count, SkPaint* paint); 256 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 257 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 258 float hOffset, float vOffset, SkPaint* paint); 259 virtual status_t drawPosText(const char* text, int bytesCount, int count, 260 const float* positions, SkPaint* paint); 261 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 262 const float* positions, SkPaint* paint, float length = -1.0f); 263 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 264 265 virtual void resetShader(); 266 virtual void setupShader(SkiaShader* shader); 267 268 virtual void resetColorFilter(); 269 virtual void setupColorFilter(SkiaColorFilter* filter); 270 271 virtual void resetShadow(); 272 virtual void setupShadow(float radius, float dx, float dy, int color); 273 274 virtual void resetPaintFilter(); 275 virtual void setupPaintFilter(int clearBits, int setBits); 276 277 SkPaint* filterPaint(SkPaint* paint); 278 279 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 280 void restoreDisplayState(const DeferredDisplayState& state, int stateDeferFlags); 281 282 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 283 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 284 285 // TODO: what does this mean? no perspective? no rotate? 286 ANDROID_API bool isCurrentTransformSimple() { 287 return mSnapshot->transform->isSimple(); 288 } 289 290 Caches& getCaches() { 291 return mCaches; 292 } 293 294 // simple rect clip 295 bool isCurrentClipSimple() { 296 return mSnapshot->clipRegion->isEmpty(); 297 } 298 299 /** 300 * Scales the alpha on the current snapshot. This alpha value will be modulated 301 * with other alpha values when drawing primitives. 302 */ 303 void scaleAlpha(float alpha) { 304 mSnapshot->alpha *= alpha; 305 } 306 307 /** 308 * Inserts a named event marker in the stream of GL commands. 309 */ 310 void eventMark(const char* name) const; 311 312 /** 313 * Inserts a named group marker in the stream of GL commands. This marker 314 * can be used by tools to group commands into logical groups. A call to 315 * this method must always be followed later on by a call to endMark(). 316 */ 317 void startMark(const char* name) const; 318 319 /** 320 * Closes the last group marker opened by startMark(). 321 */ 322 void endMark() const; 323 324 /** 325 * Gets the alpha and xfermode out of a paint object. If the paint is null 326 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 327 * not multiply the paint's alpha by the current snapshot's alpha. 328 * 329 * @param paint The paint to extract values from 330 * @param alpha Where to store the resulting alpha 331 * @param mode Where to store the resulting xfermode 332 */ 333 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 334 if (paint) { 335 *mode = getXfermode(paint->getXfermode()); 336 337 // Skia draws using the color's alpha channel if < 255 338 // Otherwise, it uses the paint's alpha 339 int color = paint->getColor(); 340 *alpha = (color >> 24) & 0xFF; 341 if (*alpha == 255) { 342 *alpha = paint->getAlpha(); 343 } 344 } else { 345 *mode = SkXfermode::kSrcOver_Mode; 346 *alpha = 255; 347 } 348 } 349 350 /** 351 * Return the best transform to use to rasterize text given a full 352 * transform matrix. 353 */ 354 mat4 findBestFontTransform(const mat4& transform) const; 355 356protected: 357 /** 358 * Computes the projection matrix, initialize the first snapshot 359 * and stores the dimensions of the render target. 360 */ 361 void initViewport(int width, int height); 362 363 /** 364 * Clears the underlying surface if needed. 365 */ 366 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 367 368 /** 369 * Call this method after updating a layer during a drawing pass. 370 */ 371 void resumeAfterLayer(); 372 373 /** 374 * This method is called whenever a stencil buffer is required. Subclasses 375 * should override this method and call attachStencilBufferToLayer() on the 376 * appropriate layer(s). 377 */ 378 virtual void ensureStencilBuffer(); 379 380 /** 381 * Obtains a stencil render buffer (allocating it if necessary) and 382 * attaches it to the specified layer. 383 */ 384 void attachStencilBufferToLayer(Layer* layer); 385 386 /** 387 * Compose the layer defined in the current snapshot with the layer 388 * defined by the previous snapshot. 389 * 390 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 391 * 392 * @param curent The current snapshot containing the layer to compose 393 * @param previous The previous snapshot to compose the current layer with 394 */ 395 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 396 397 /** 398 * Marks the specified region as dirty at the specified bounds. 399 */ 400 void dirtyLayerUnchecked(Rect& bounds, Region* region); 401 402 /** 403 * Returns the current snapshot. 404 */ 405 sp<Snapshot> getSnapshot() const { 406 return mSnapshot; 407 } 408 409 /** 410 * Returns the region of the current layer. 411 */ 412 virtual Region* getRegion() const { 413 return mSnapshot->region; 414 } 415 416 /** 417 * Indicates whether rendering is currently targeted at a layer. 418 */ 419 virtual bool hasLayer() const { 420 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 421 } 422 423 /** 424 * Returns the name of the FBO this renderer is rendering into. 425 */ 426 virtual GLint getTargetFbo() const { 427 return 0; 428 } 429 430 /** 431 * Renders the specified layer as a textured quad. 432 * 433 * @param layer The layer to render 434 * @param rect The bounds of the layer 435 */ 436 void drawTextureLayer(Layer* layer, const Rect& rect); 437 438 /** 439 * Gets the alpha and xfermode out of a paint object. If the paint is null 440 * alpha will be 255 and the xfermode will be SRC_OVER. 441 * 442 * @param paint The paint to extract values from 443 * @param alpha Where to store the resulting alpha 444 * @param mode Where to store the resulting xfermode 445 */ 446 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 447 448 /** 449 * Safely retrieves the mode from the specified xfermode. If the specified 450 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 451 */ 452 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 453 SkXfermode::Mode resultMode; 454 if (!SkXfermode::AsMode(mode, &resultMode)) { 455 resultMode = SkXfermode::kSrcOver_Mode; 456 } 457 return resultMode; 458 } 459 460 /** 461 * Set to true to suppress error checks at the end of a frame. 462 */ 463 virtual bool suppressErrorChecks() const { 464 return false; 465 } 466 467private: 468 /** 469 * Discards the content of the framebuffer if supported by the driver. 470 * This method should be called at the beginning of a frame to optimize 471 * rendering on some tiler architectures. 472 */ 473 void discardFramebuffer(float left, float top, float right, float bottom); 474 475 /** 476 * Ensures the state of the renderer is the same as the state of 477 * the GL context. 478 */ 479 void syncState(); 480 481 /** 482 * Tells the GPU what part of the screen is about to be redrawn. 483 * This method will use the clip rect that we started drawing the 484 * frame with. 485 * This method needs to be invoked every time getTargetFbo() is 486 * bound again. 487 */ 488 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 489 490 /** 491 * Tells the GPU what part of the screen is about to be redrawn. 492 * This method needs to be invoked every time getTargetFbo() is 493 * bound again. 494 */ 495 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 496 497 /** 498 * Tells the GPU that we are done drawing the frame or that we 499 * are switching to another render target. 500 */ 501 void endTiling(); 502 503 /** 504 * Saves the current state of the renderer as a new snapshot. 505 * The new snapshot is saved in mSnapshot and the previous snapshot 506 * is linked from mSnapshot->previous. 507 * 508 * @param flags The save flags; see SkCanvas for more information 509 * 510 * @return The new save count. This value can be passed to #restoreToCount() 511 */ 512 int saveSnapshot(int flags); 513 514 /** 515 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 516 * 517 * @return True if the clip was modified. 518 */ 519 bool restoreSnapshot(); 520 521 /** 522 * Sets the clipping rectangle using glScissor. The clip is defined by 523 * the current snapshot's clipRect member. 524 */ 525 void setScissorFromClip(); 526 527 /** 528 * Sets the clipping region using the stencil buffer. The clip region 529 * is defined by the current snapshot's clipRegion member. 530 */ 531 void setStencilFromClip(); 532 533 /** 534 * Performs a quick reject but does not affect the scissor. Returns 535 * the transformed rect to test and the current clip. 536 */ 537 bool quickRejectNoScissor(float left, float top, float right, float bottom, 538 Rect& transformed, Rect& clip); 539 540 /** 541 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 542 */ 543 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 544 545 /** 546 * given the local bounds of the layer, calculates ... 547 */ 548 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 549 550 /** 551 * Creates a new layer stored in the specified snapshot. 552 * 553 * @param snapshot The snapshot associated with the new layer 554 * @param left The left coordinate of the layer 555 * @param top The top coordinate of the layer 556 * @param right The right coordinate of the layer 557 * @param bottom The bottom coordinate of the layer 558 * @param alpha The translucency of the layer 559 * @param mode The blending mode of the layer 560 * @param flags The layer save flags 561 * @param previousFbo The name of the current framebuffer 562 * 563 * @return True if the layer was successfully created, false otherwise 564 */ 565 bool createLayer(float left, float top, float right, float bottom, 566 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 567 568 /** 569 * Creates a new layer stored in the specified snapshot as an FBO. 570 * 571 * @param layer The layer to store as an FBO 572 * @param snapshot The snapshot associated with the new layer 573 * @param bounds The bounds of the layer 574 * @param previousFbo The name of the current framebuffer 575 */ 576 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 577 578 /** 579 * Compose the specified layer as a region. 580 * 581 * @param layer The layer to compose 582 * @param rect The layer's bounds 583 */ 584 void composeLayerRegion(Layer* layer, const Rect& rect); 585 586 /** 587 * Compose the specified layer as a simple rectangle. 588 * 589 * @param layer The layer to compose 590 * @param rect The layer's bounds 591 * @param swap If true, the source and destination are swapped 592 */ 593 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 594 595 /** 596 * Clears all the regions corresponding to the current list of layers. 597 * This method MUST be invoked before any drawing operation. 598 */ 599 void clearLayerRegions(); 600 601 /** 602 * Mark the layer as dirty at the specified coordinates. The coordinates 603 * are transformed with the supplied matrix. 604 */ 605 void dirtyLayer(const float left, const float top, 606 const float right, const float bottom, const mat4 transform); 607 608 /** 609 * Mark the layer as dirty at the specified coordinates. 610 */ 611 void dirtyLayer(const float left, const float top, 612 const float right, const float bottom); 613 614 /** 615 * Draws a colored rectangle with the specified color. The specified coordinates 616 * are transformed by the current snapshot's transform matrix unless specified 617 * otherwise. 618 * 619 * @param left The left coordinate of the rectangle 620 * @param top The top coordinate of the rectangle 621 * @param right The right coordinate of the rectangle 622 * @param bottom The bottom coordinate of the rectangle 623 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 624 * @param mode The Skia xfermode to use 625 * @param ignoreTransform True if the current transform should be ignored 626 */ 627 void drawColorRect(float left, float top, float right, float bottom, 628 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 629 630 /** 631 * Draws a series of colored rectangles with the specified color. The specified 632 * coordinates are transformed by the current snapshot's transform matrix unless 633 * specified otherwise. 634 * 635 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 636 * per rectangle 637 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 638 * @param mode The Skia xfermode to use 639 * @param ignoreTransform True if the current transform should be ignored 640 * @param dirty True if calling this method should dirty the current layer 641 * @param clip True if the rects should be clipped, false otherwise 642 */ 643 status_t drawColorRects(const float* rects, int count, int color, 644 SkXfermode::Mode mode, bool ignoreTransform = false, 645 bool dirty = true, bool clip = true); 646 647 /** 648 * Draws the shape represented by the specified path texture. 649 * This method invokes drawPathTexture() but takes into account 650 * the extra left/top offset and the texture offset to correctly 651 * position the final shape. 652 * 653 * @param left The left coordinate of the shape to render 654 * @param top The top coordinate of the shape to render 655 * @param texture The texture reprsenting the shape 656 * @param paint The paint to draw the shape with 657 */ 658 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 659 660 /** 661 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 662 * different compositing rules. 663 * 664 * @param texture The texture to draw with 665 * @param left The x coordinate of the bitmap 666 * @param top The y coordinate of the bitmap 667 * @param paint The paint to render with 668 */ 669 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 670 671 /** 672 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 673 * 674 * @param vertexBuffer The VertexBuffer to be drawn 675 * @param paint The paint to render with 676 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 677 */ 678 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 679 bool useOffset = false); 680 681 /** 682 * Renders the convex hull defined by the specified path as a strip of polygons. 683 * 684 * @param path The hull of the path to draw 685 * @param paint The paint to render with 686 */ 687 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 688 689 /** 690 * Draws a textured rectangle with the specified texture. The specified coordinates 691 * are transformed by the current snapshot's transform matrix. 692 * 693 * @param left The left coordinate of the rectangle 694 * @param top The top coordinate of the rectangle 695 * @param right The right coordinate of the rectangle 696 * @param bottom The bottom coordinate of the rectangle 697 * @param texture The texture name to map onto the rectangle 698 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 699 * @param mode The blending mode 700 * @param blend True if the texture contains an alpha channel 701 */ 702 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 703 float alpha, SkXfermode::Mode mode, bool blend); 704 705 /** 706 * Draws a textured rectangle with the specified texture. The specified coordinates 707 * are transformed by the current snapshot's transform matrix. 708 * 709 * @param left The left coordinate of the rectangle 710 * @param top The top coordinate of the rectangle 711 * @param right The right coordinate of the rectangle 712 * @param bottom The bottom coordinate of the rectangle 713 * @param texture The texture to use 714 * @param paint The paint containing the alpha, blending mode, etc. 715 */ 716 void drawTextureRect(float left, float top, float right, float bottom, 717 Texture* texture, SkPaint* paint); 718 719 /** 720 * Draws a textured mesh with the specified texture. If the indices are omitted, 721 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 722 * VBO is bound. 723 * 724 * @param left The left coordinate of the rectangle 725 * @param top The top coordinate of the rectangle 726 * @param right The right coordinate of the rectangle 727 * @param bottom The bottom coordinate of the rectangle 728 * @param texture The texture name to map onto the rectangle 729 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 730 * @param mode The blending mode 731 * @param blend True if the texture contains an alpha channel 732 * @param vertices The vertices that define the mesh 733 * @param texCoords The texture coordinates of each vertex 734 * @param elementsCount The number of elements in the mesh, required by indices 735 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 736 * @param ignoreTransform True if the current transform should be ignored 737 * @param vbo The VBO used to draw the mesh 738 * @param ignoreScale True if the model view matrix should not be scaled 739 * @param dirty True if calling this method should dirty the current layer 740 */ 741 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 742 float alpha, SkXfermode::Mode mode, bool blend, 743 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 744 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 745 bool ignoreScale = false, bool dirty = true); 746 747 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 748 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 749 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 750 bool ignoreTransform, bool dirty = true); 751 752 /** 753 * Draws text underline and strike-through if needed. 754 * 755 * @param text The text to decor 756 * @param bytesCount The number of bytes in the text 757 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 758 * @param x The x coordinate where the text will be drawn 759 * @param y The y coordinate where the text will be drawn 760 * @param paint The paint to draw the text with 761 */ 762 void drawTextDecorations(const char* text, int bytesCount, float length, 763 float x, float y, SkPaint* paint); 764 765 /** 766 * Draws shadow layer on text (with optional positions). 767 * 768 * @param paint The paint to draw the shadow with 769 * @param text The text to draw 770 * @param bytesCount The number of bytes in the text 771 * @param count The number of glyphs in the text 772 * @param positions The x, y positions of individual glyphs (or NULL) 773 * @param fontRenderer The font renderer object 774 * @param alpha The alpha value for drawing the shadow 775 * @param mode The xfermode for drawing the shadow 776 * @param x The x coordinate where the shadow will be drawn 777 * @param y The y coordinate where the shadow will be drawn 778 */ 779 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 780 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 781 float x, float y); 782 783 /** 784 * Draws a path texture. Path textures are alpha8 bitmaps that need special 785 * compositing to apply colors/filters/etc. 786 * 787 * @param texture The texture to render 788 * @param x The x coordinate where the texture will be drawn 789 * @param y The y coordinate where the texture will be drawn 790 * @param paint The paint to draw the texture with 791 */ 792 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 793 794 /** 795 * Resets the texture coordinates stored in mMeshVertices. Setting the values 796 * back to default is achieved by calling: 797 * 798 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 799 * 800 * @param u1 The left coordinate of the texture 801 * @param v1 The bottom coordinate of the texture 802 * @param u2 The right coordinate of the texture 803 * @param v2 The top coordinate of the texture 804 */ 805 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 806 807 /** 808 * Returns true if the specified paint will draw invisible text. 809 */ 810 bool canSkipText(const SkPaint* paint) const; 811 812 /** 813 * Binds the specified texture. The texture unit must have been selected 814 * prior to calling this method. 815 */ 816 inline void bindTexture(GLuint texture) { 817 glBindTexture(GL_TEXTURE_2D, texture); 818 } 819 820 /** 821 * Binds the specified EGLImage texture. The texture unit must have been selected 822 * prior to calling this method. 823 */ 824 inline void bindExternalTexture(GLuint texture) { 825 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 826 } 827 828 /** 829 * Enable or disable blending as necessary. This function sets the appropriate 830 * blend function based on the specified xfermode. 831 */ 832 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 833 bool swapSrcDst = false); 834 835 /** 836 * Use the specified program with the current GL context. If the program is already 837 * in use, it will not be bound again. If it is not in use, the current program is 838 * marked unused and the specified program becomes used and becomes the new 839 * current program. 840 * 841 * @param program The program to use 842 * 843 * @return true If the specified program was already in use, false otherwise. 844 */ 845 inline bool useProgram(Program* program); 846 847 /** 848 * Invoked before any drawing operation. This sets required state. 849 */ 850 void setupDraw(bool clear = true); 851 852 /** 853 * Various methods to setup OpenGL rendering. 854 */ 855 void setupDrawWithTexture(bool isAlpha8 = false); 856 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 857 void setupDrawWithExternalTexture(); 858 void setupDrawNoTexture(); 859 void setupDrawAA(); 860 void setupDrawPoint(float pointSize); 861 void setupDrawColor(int color, int alpha); 862 void setupDrawColor(float r, float g, float b, float a); 863 void setupDrawAlpha8Color(int color, int alpha); 864 void setupDrawTextGamma(const SkPaint* paint); 865 void setupDrawShader(); 866 void setupDrawColorFilter(); 867 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 868 bool swapSrcDst = false); 869 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 870 bool swapSrcDst = false); 871 void setupDrawProgram(); 872 void setupDrawDirtyRegionsDisabled(); 873 void setupDrawModelViewIdentity(bool offset = false); 874 void setupDrawModelView(float left, float top, float right, float bottom, 875 bool ignoreTransform = false, bool ignoreModelView = false); 876 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 877 bool ignoreTransform = false); 878 void setupDrawPointUniforms(); 879 void setupDrawColorUniforms(); 880 void setupDrawPureColorUniforms(); 881 void setupDrawShaderIdentityUniforms(); 882 void setupDrawShaderUniforms(bool ignoreTransform = false); 883 void setupDrawColorFilterUniforms(); 884 void setupDrawSimpleMesh(); 885 void setupDrawTexture(GLuint texture); 886 void setupDrawExternalTexture(GLuint texture); 887 void setupDrawTextureTransform(); 888 void setupDrawTextureTransformUniforms(mat4& transform); 889 void setupDrawTextGammaUniforms(); 890 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 891 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 892 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 893 void setupDrawVertices(GLvoid* vertices); 894 void finishDrawTexture(); 895 void accountForClear(SkXfermode::Mode mode); 896 897 bool updateLayer(Layer* layer, bool inFrame); 898 void updateLayers(); 899 900 /** 901 * Renders the specified region as a series of rectangles. This method 902 * is used for debugging only. 903 */ 904 void drawRegionRects(const Region& region); 905 906 /** 907 * Renders the specified region as a series of rectangles. The region 908 * must be in screen-space coordinates. 909 */ 910 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 911 bool dirty = false); 912 913 /** 914 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 915 * is turned on. 916 */ 917 void debugClip(); 918 919 void debugOverdraw(bool enable, bool clear); 920 void renderOverdraw(); 921 922 /** 923 * Should be invoked every time the glScissor is modified. 924 */ 925 inline void dirtyClip() { 926 mDirtyClip = true; 927 } 928 929 inline mat4& currentTransform() const { 930 return *mSnapshot->transform; 931 } 932 933 // Dimensions of the drawing surface 934 int mWidth, mHeight; 935 936 // Matrix used for ortho projection in shaders 937 mat4 mOrthoMatrix; 938 939 // Model-view matrix used to position/size objects 940 mat4 mModelView; 941 942 // Number of saved states 943 int mSaveCount; 944 // Base state 945 sp<Snapshot> mFirstSnapshot; 946 // Current state 947 sp<Snapshot> mSnapshot; 948 // State used to define the clipping region 949 sp<Snapshot> mTilingSnapshot; 950 951 // Used to draw textured quads 952 TextureVertex mMeshVertices[4]; 953 954 // shader, filters, and shadow 955 DrawModifiers mDrawModifiers; 956 SkPaint mFilteredPaint; 957 958 // Various caches 959 Caches& mCaches; 960 Extensions& mExtensions; 961 962 // List of rectangles to clear after saveLayer() is invoked 963 Vector<Rect*> mLayers; 964 // List of functors to invoke after a frame is drawn 965 SortedVector<Functor*> mFunctors; 966 // List of layers to update at the beginning of a frame 967 Vector<Layer*> mLayerUpdates; 968 969 // Indicates whether the clip must be restored 970 bool mDirtyClip; 971 972 // The following fields are used to setup drawing 973 // Used to describe the shaders to generate 974 ProgramDescription mDescription; 975 // Color description 976 bool mColorSet; 977 float mColorA, mColorR, mColorG, mColorB; 978 // Indicates that the shader should get a color 979 bool mSetShaderColor; 980 // Current texture unit 981 GLuint mTextureUnit; 982 // Track dirty regions, true by default 983 bool mTrackDirtyRegions; 984 // Indicate whether we are drawing an opaque frame 985 bool mOpaqueFrame; 986 987 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 988 // Properties.h 989 bool mScissorOptimizationDisabled; 990 991 // No-ops start/endTiling when set 992 bool mSuppressTiling; 993 994 // Optional name of the renderer 995 String8 mName; 996 997 friend class DisplayListRenderer; 998 999}; // class OpenGLRenderer 1000 1001}; // namespace uirenderer 1002}; // namespace android 1003 1004#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1005