OpenGLRenderer.h revision 9eac52698b18d089e73c7ec2bf73a64a39504733
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 TextSetupFunctor; 89class VertexBuffer; 90 91/** 92 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 93 * simplified version of Skia's Canvas API. 94 */ 95class OpenGLRenderer { 96public: 97 ANDROID_API OpenGLRenderer(); 98 virtual ~OpenGLRenderer(); 99 100 /** 101 * Sets the name of this renderer. The name is optional and 102 * empty by default. If the pointer is null the name is set 103 * to the empty string. 104 */ 105 ANDROID_API void setName(const char* name); 106 107 /** 108 * Returns the name of this renderer as UTF8 string. 109 * The returned pointer is never null. 110 */ 111 ANDROID_API const char* getName() const; 112 113 /** 114 * Read externally defined properties to control the behavior 115 * of the renderer. 116 */ 117 ANDROID_API void initProperties(); 118 119 /** 120 * Indicates whether this renderer executes drawing commands immediately. 121 * If this method returns true, the drawing commands will be executed 122 * later. 123 */ 124 virtual bool isDeferred(); 125 126 /** 127 * Sets the dimension of the underlying drawing surface. This method must 128 * be called at least once every time the drawing surface changes size. 129 * 130 * @param width The width in pixels of the underlysing surface 131 * @param height The height in pixels of the underlysing surface 132 */ 133 virtual void setViewport(int width, int height); 134 135 /** 136 * Prepares the renderer to draw a frame. This method must be invoked 137 * at the beginning of each frame. When this method is invoked, the 138 * entire drawing surface is assumed to be redrawn. 139 * 140 * @param opaque If true, the target surface is considered opaque 141 * and will not be cleared. If false, the target surface 142 * will be cleared 143 */ 144 ANDROID_API status_t prepare(bool opaque); 145 146 /** 147 * Prepares the renderer to draw a frame. This method must be invoked 148 * at the beginning of each frame. Only the specified rectangle of the 149 * frame is assumed to be dirty. A clip will automatically be set to 150 * the specified rectangle. 151 * 152 * @param left The left coordinate of the dirty rectangle 153 * @param top The top coordinate of the dirty rectangle 154 * @param right The right coordinate of the dirty rectangle 155 * @param bottom The bottom coordinate of the dirty rectangle 156 * @param opaque If true, the target surface is considered opaque 157 * and will not be cleared. If false, the target surface 158 * will be cleared in the specified dirty rectangle 159 */ 160 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 161 162 /** 163 * Indicates the end of a frame. This method must be invoked whenever 164 * the caller is done rendering a frame. 165 */ 166 virtual void finish(); 167 168 /** 169 * This method must be invoked before handing control over to a draw functor. 170 * See callDrawGLFunction() for instance. 171 * 172 * This command must not be recorded inside display lists. 173 */ 174 virtual void interrupt(); 175 176 /** 177 * This method must be invoked after getting control back from a draw functor. 178 * 179 * This command must not be recorded inside display lists. 180 */ 181 virtual void resume(); 182 183 ANDROID_API status_t invokeFunctors(Rect& dirty); 184 ANDROID_API void detachFunctor(Functor* functor); 185 ANDROID_API void attachFunctor(Functor* functor); 186 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 187 188 ANDROID_API void pushLayerUpdate(Layer* layer); 189 ANDROID_API void clearLayerUpdates(); 190 191 ANDROID_API int getSaveCount() const; 192 virtual int save(int flags); 193 virtual void restore(); 194 virtual void restoreToCount(int saveCount); 195 196 ANDROID_API int saveLayer(float left, float top, float right, float bottom, 197 SkPaint* paint, int flags) { 198 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; 199 if (paint) mode = getXfermode(paint->getXfermode()); 200 return saveLayer(left, top, right, bottom, paint ? paint->getAlpha() : 255, mode, flags); 201 } 202 ANDROID_API int saveLayerAlpha(float left, float top, float right, float bottom, 203 int alpha, int flags) { 204 return saveLayer(left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 205 } 206 virtual int saveLayer(float left, float top, float right, float bottom, 207 int alpha, SkXfermode::Mode mode, int flags); 208 209 int saveLayerDeferred(float left, float top, float right, float bottom, 210 int alpha, SkXfermode::Mode mode, int flags); 211 212 virtual void translate(float dx, float dy); 213 virtual void rotate(float degrees); 214 virtual void scale(float sx, float sy); 215 virtual void skew(float sx, float sy); 216 217 bool hasRectToRectTransform(); 218 ANDROID_API void getMatrix(SkMatrix* matrix); 219 virtual void setMatrix(SkMatrix* matrix); 220 virtual void concatMatrix(SkMatrix* matrix); 221 222 ANDROID_API const Rect& getClipBounds(); 223 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 224 bool quickRejectNoScissor(float left, float top, float right, float bottom); 225 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 226 virtual bool clipPath(SkPath* path, SkRegion::Op op); 227 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 228 virtual Rect* getClipRect(); 229 230 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags); 231 virtual void outputDisplayList(DisplayList* displayList); 232 virtual status_t drawLayer(Layer* layer, float x, float y); 233 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 234 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 235 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 236 float srcRight, float srcBottom, float dstLeft, float dstTop, 237 float dstRight, float dstBottom, SkPaint* paint); 238 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 239 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 240 float* vertices, int* colors, SkPaint* paint); 241 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 242 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 243 float left, float top, float right, float bottom, SkPaint* paint); 244 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 245 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 246 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 247 virtual status_t drawColor(int color, SkXfermode::Mode mode); 248 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 249 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 250 float rx, float ry, SkPaint* paint); 251 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 252 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 253 virtual status_t drawArc(float left, float top, float right, float bottom, 254 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 255 virtual status_t drawPath(SkPath* path, SkPaint* paint); 256 virtual status_t drawLines(float* points, int count, SkPaint* paint); 257 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 258 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 259 float hOffset, float vOffset, SkPaint* paint); 260 virtual status_t drawPosText(const char* text, int bytesCount, int count, 261 const float* positions, SkPaint* paint); 262 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 263 const float* positions, SkPaint* paint, float length = -1.0f); 264 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 265 266 virtual void resetShader(); 267 virtual void setupShader(SkiaShader* shader); 268 269 virtual void resetColorFilter(); 270 virtual void setupColorFilter(SkiaColorFilter* filter); 271 272 virtual void resetShadow(); 273 virtual void setupShadow(float radius, float dx, float dy, int color); 274 275 virtual void resetPaintFilter(); 276 virtual void setupPaintFilter(int clearBits, int setBits); 277 278 SkPaint* filterPaint(SkPaint* paint); 279 280 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 281 void restoreDisplayState(const DeferredDisplayState& state, int stateDeferFlags); 282 283 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 284 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 285 286 // TODO: what does this mean? no perspective? no rotate? 287 ANDROID_API bool isCurrentTransformSimple() { 288 return mSnapshot->transform->isSimple(); 289 } 290 291 Caches& getCaches() { 292 return mCaches; 293 } 294 295 // simple rect clip 296 bool isCurrentClipSimple() { 297 return mSnapshot->clipRegion->isEmpty(); 298 } 299 300 /** 301 * Scales the alpha on the current snapshot. This alpha value will be modulated 302 * with other alpha values when drawing primitives. 303 */ 304 void scaleAlpha(float alpha) { 305 mSnapshot->alpha *= alpha; 306 } 307 308 /** 309 * Inserts a named event marker in the stream of GL commands. 310 */ 311 void eventMark(const char* name) const; 312 313 /** 314 * Inserts a named group marker in the stream of GL commands. This marker 315 * can be used by tools to group commands into logical groups. A call to 316 * this method must always be followed later on by a call to endMark(). 317 */ 318 void startMark(const char* name) const; 319 320 /** 321 * Closes the last group marker opened by startMark(). 322 */ 323 void endMark() const; 324 325 /** 326 * Gets the alpha and xfermode out of a paint object. If the paint is null 327 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 328 * not multiply the paint's alpha by the current snapshot's alpha. 329 * 330 * @param paint The paint to extract values from 331 * @param alpha Where to store the resulting alpha 332 * @param mode Where to store the resulting xfermode 333 */ 334 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 335 if (paint) { 336 *mode = getXfermode(paint->getXfermode()); 337 338 // Skia draws using the color's alpha channel if < 255 339 // Otherwise, it uses the paint's alpha 340 int color = paint->getColor(); 341 *alpha = (color >> 24) & 0xFF; 342 if (*alpha == 255) { 343 *alpha = paint->getAlpha(); 344 } 345 } else { 346 *mode = SkXfermode::kSrcOver_Mode; 347 *alpha = 255; 348 } 349 } 350 351 /** 352 * Return the best transform to use to rasterize text given a full 353 * transform matrix. 354 */ 355 mat4 findBestFontTransform(const mat4& transform) const; 356 357protected: 358 /** 359 * Computes the projection matrix, initialize the first snapshot 360 * and stores the dimensions of the render target. 361 */ 362 void initViewport(int width, int height); 363 364 /** 365 * Clears the underlying surface if needed. 366 */ 367 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 368 369 /** 370 * Call this method after updating a layer during a drawing pass. 371 */ 372 void resumeAfterLayer(); 373 374 /** 375 * This method is called whenever a stencil buffer is required. Subclasses 376 * should override this method and call attachStencilBufferToLayer() on the 377 * appropriate layer(s). 378 */ 379 virtual void ensureStencilBuffer(); 380 381 /** 382 * Obtains a stencil render buffer (allocating it if necessary) and 383 * attaches it to the specified layer. 384 */ 385 void attachStencilBufferToLayer(Layer* layer); 386 387 /** 388 * Compose the layer defined in the current snapshot with the layer 389 * defined by the previous snapshot. 390 * 391 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 392 * 393 * @param curent The current snapshot containing the layer to compose 394 * @param previous The previous snapshot to compose the current layer with 395 */ 396 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 397 398 /** 399 * Marks the specified region as dirty at the specified bounds. 400 */ 401 void dirtyLayerUnchecked(Rect& bounds, Region* region); 402 403 /** 404 * Returns the current snapshot. 405 */ 406 sp<Snapshot> getSnapshot() const { 407 return mSnapshot; 408 } 409 410 /** 411 * Returns the region of the current layer. 412 */ 413 virtual Region* getRegion() const { 414 return mSnapshot->region; 415 } 416 417 /** 418 * Indicates whether rendering is currently targeted at a layer. 419 */ 420 virtual bool hasLayer() const { 421 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 422 } 423 424 /** 425 * Returns the name of the FBO this renderer is rendering into. 426 */ 427 virtual GLint getTargetFbo() const { 428 return 0; 429 } 430 431 /** 432 * Renders the specified layer as a textured quad. 433 * 434 * @param layer The layer to render 435 * @param rect The bounds of the layer 436 */ 437 void drawTextureLayer(Layer* layer, const Rect& rect); 438 439 /** 440 * Gets the alpha and xfermode out of a paint object. If the paint is null 441 * alpha will be 255 and the xfermode will be SRC_OVER. 442 * 443 * @param paint The paint to extract values from 444 * @param alpha Where to store the resulting alpha 445 * @param mode Where to store the resulting xfermode 446 */ 447 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 448 449 /** 450 * Safely retrieves the mode from the specified xfermode. If the specified 451 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 452 */ 453 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 454 SkXfermode::Mode resultMode; 455 if (!SkXfermode::AsMode(mode, &resultMode)) { 456 resultMode = SkXfermode::kSrcOver_Mode; 457 } 458 return resultMode; 459 } 460 461 /** 462 * Set to true to suppress error checks at the end of a frame. 463 */ 464 virtual bool suppressErrorChecks() const { 465 return false; 466 } 467 468private: 469 /** 470 * Discards the content of the framebuffer if supported by the driver. 471 * This method should be called at the beginning of a frame to optimize 472 * rendering on some tiler architectures. 473 */ 474 void discardFramebuffer(float left, float top, float right, float bottom); 475 476 /** 477 * Ensures the state of the renderer is the same as the state of 478 * the GL context. 479 */ 480 void syncState(); 481 482 /** 483 * Tells the GPU what part of the screen is about to be redrawn. 484 * This method will use the clip rect that we started drawing the 485 * frame with. 486 * This method needs to be invoked every time getTargetFbo() is 487 * bound again. 488 */ 489 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 490 491 /** 492 * Tells the GPU what part of the screen is about to be redrawn. 493 * This method needs to be invoked every time getTargetFbo() is 494 * bound again. 495 */ 496 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 497 498 /** 499 * Tells the GPU that we are done drawing the frame or that we 500 * are switching to another render target. 501 */ 502 void endTiling(); 503 504 /** 505 * Saves the current state of the renderer as a new snapshot. 506 * The new snapshot is saved in mSnapshot and the previous snapshot 507 * is linked from mSnapshot->previous. 508 * 509 * @param flags The save flags; see SkCanvas for more information 510 * 511 * @return The new save count. This value can be passed to #restoreToCount() 512 */ 513 int saveSnapshot(int flags); 514 515 /** 516 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 517 * 518 * @return True if the clip was modified. 519 */ 520 bool restoreSnapshot(); 521 522 /** 523 * Sets the clipping rectangle using glScissor. The clip is defined by 524 * the current snapshot's clipRect member. 525 */ 526 void setScissorFromClip(); 527 528 /** 529 * Sets the clipping region using the stencil buffer. The clip region 530 * is defined by the current snapshot's clipRegion member. 531 */ 532 void setStencilFromClip(); 533 534 /** 535 * Performs a quick reject but does not affect the scissor. Returns 536 * the transformed rect to test and the current clip. 537 */ 538 bool quickRejectNoScissor(float left, float top, float right, float bottom, 539 Rect& transformed, Rect& clip); 540 541 /** 542 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 543 */ 544 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 545 546 /** 547 * given the local bounds of the layer, calculates ... 548 */ 549 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 550 551 /** 552 * Creates a new layer stored in the specified snapshot. 553 * 554 * @param snapshot The snapshot associated with the new layer 555 * @param left The left coordinate of the layer 556 * @param top The top coordinate of the layer 557 * @param right The right coordinate of the layer 558 * @param bottom The bottom coordinate of the layer 559 * @param alpha The translucency of the layer 560 * @param mode The blending mode of the layer 561 * @param flags The layer save flags 562 * @param previousFbo The name of the current framebuffer 563 * 564 * @return True if the layer was successfully created, false otherwise 565 */ 566 bool createLayer(float left, float top, float right, float bottom, 567 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 568 569 /** 570 * Creates a new layer stored in the specified snapshot as an FBO. 571 * 572 * @param layer The layer to store as an FBO 573 * @param snapshot The snapshot associated with the new layer 574 * @param bounds The bounds of the layer 575 * @param previousFbo The name of the current framebuffer 576 */ 577 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 578 579 /** 580 * Compose the specified layer as a region. 581 * 582 * @param layer The layer to compose 583 * @param rect The layer's bounds 584 */ 585 void composeLayerRegion(Layer* layer, const Rect& rect); 586 587 /** 588 * Compose the specified layer as a simple rectangle. 589 * 590 * @param layer The layer to compose 591 * @param rect The layer's bounds 592 * @param swap If true, the source and destination are swapped 593 */ 594 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 595 596 /** 597 * Clears all the regions corresponding to the current list of layers. 598 * This method MUST be invoked before any drawing operation. 599 */ 600 void clearLayerRegions(); 601 602 /** 603 * Mark the layer as dirty at the specified coordinates. The coordinates 604 * are transformed with the supplied matrix. 605 */ 606 void dirtyLayer(const float left, const float top, 607 const float right, const float bottom, const mat4 transform); 608 609 /** 610 * Mark the layer as dirty at the specified coordinates. 611 */ 612 void dirtyLayer(const float left, const float top, 613 const float right, const float bottom); 614 615 /** 616 * Draws a colored rectangle with the specified color. The specified coordinates 617 * are transformed by the current snapshot's transform matrix unless specified 618 * otherwise. 619 * 620 * @param left The left coordinate of the rectangle 621 * @param top The top coordinate of the rectangle 622 * @param right The right coordinate of the rectangle 623 * @param bottom The bottom coordinate of the rectangle 624 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 625 * @param mode The Skia xfermode to use 626 * @param ignoreTransform True if the current transform should be ignored 627 */ 628 void drawColorRect(float left, float top, float right, float bottom, 629 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 630 631 /** 632 * Draws a series of colored rectangles with the specified color. The specified 633 * coordinates are transformed by the current snapshot's transform matrix unless 634 * specified otherwise. 635 * 636 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 637 * per rectangle 638 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 639 * @param mode The Skia xfermode to use 640 * @param ignoreTransform True if the current transform should be ignored 641 * @param dirty True if calling this method should dirty the current layer 642 * @param clip True if the rects should be clipped, false otherwise 643 */ 644 status_t drawColorRects(const float* rects, int count, int color, 645 SkXfermode::Mode mode, bool ignoreTransform = false, 646 bool dirty = true, bool clip = true); 647 648 /** 649 * Draws the shape represented by the specified path texture. 650 * This method invokes drawPathTexture() but takes into account 651 * the extra left/top offset and the texture offset to correctly 652 * position the final shape. 653 * 654 * @param left The left coordinate of the shape to render 655 * @param top The top coordinate of the shape to render 656 * @param texture The texture reprsenting the shape 657 * @param paint The paint to draw the shape with 658 */ 659 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 660 661 /** 662 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 663 * different compositing rules. 664 * 665 * @param texture The texture to draw with 666 * @param left The x coordinate of the bitmap 667 * @param top The y coordinate of the bitmap 668 * @param paint The paint to render with 669 */ 670 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 671 672 /** 673 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 674 * 675 * @param vertexBuffer The VertexBuffer to be drawn 676 * @param paint The paint to render with 677 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 678 */ 679 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 680 bool useOffset = false); 681 682 /** 683 * Renders the convex hull defined by the specified path as a strip of polygons. 684 * 685 * @param path The hull of the path to draw 686 * @param paint The paint to render with 687 */ 688 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 689 690 /** 691 * Draws a textured rectangle with the specified texture. The specified coordinates 692 * are transformed by the current snapshot's transform matrix. 693 * 694 * @param left The left coordinate of the rectangle 695 * @param top The top coordinate of the rectangle 696 * @param right The right coordinate of the rectangle 697 * @param bottom The bottom coordinate of the rectangle 698 * @param texture The texture name to map onto the rectangle 699 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 700 * @param mode The blending mode 701 * @param blend True if the texture contains an alpha channel 702 */ 703 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 704 float alpha, SkXfermode::Mode mode, bool blend); 705 706 /** 707 * Draws a textured rectangle with the specified texture. The specified coordinates 708 * are transformed by the current snapshot's transform matrix. 709 * 710 * @param left The left coordinate of the rectangle 711 * @param top The top coordinate of the rectangle 712 * @param right The right coordinate of the rectangle 713 * @param bottom The bottom coordinate of the rectangle 714 * @param texture The texture to use 715 * @param paint The paint containing the alpha, blending mode, etc. 716 */ 717 void drawTextureRect(float left, float top, float right, float bottom, 718 Texture* texture, SkPaint* paint); 719 720 /** 721 * Draws a textured mesh with the specified texture. If the indices are omitted, 722 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 723 * VBO is bound. 724 * 725 * @param left The left coordinate of the rectangle 726 * @param top The top coordinate of the rectangle 727 * @param right The right coordinate of the rectangle 728 * @param bottom The bottom coordinate of the rectangle 729 * @param texture The texture name to map onto the rectangle 730 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 731 * @param mode The blending mode 732 * @param blend True if the texture contains an alpha channel 733 * @param vertices The vertices that define the mesh 734 * @param texCoords The texture coordinates of each vertex 735 * @param elementsCount The number of elements in the mesh, required by indices 736 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 737 * @param ignoreTransform True if the current transform should be ignored 738 * @param vbo The VBO used to draw the mesh 739 * @param ignoreScale True if the model view matrix should not be scaled 740 * @param dirty True if calling this method should dirty the current layer 741 */ 742 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 743 float alpha, SkXfermode::Mode mode, bool blend, 744 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 745 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 746 bool ignoreScale = false, bool dirty = true); 747 748 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 749 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 750 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 751 bool ignoreTransform, bool dirty = true); 752 753 /** 754 * Draws text underline and strike-through if needed. 755 * 756 * @param text The text to decor 757 * @param bytesCount The number of bytes in the text 758 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 759 * @param x The x coordinate where the text will be drawn 760 * @param y The y coordinate where the text will be drawn 761 * @param paint The paint to draw the text with 762 */ 763 void drawTextDecorations(const char* text, int bytesCount, float length, 764 float x, float y, SkPaint* paint); 765 766 /** 767 * Draws shadow layer on text (with optional positions). 768 * 769 * @param paint The paint to draw the shadow with 770 * @param text The text to draw 771 * @param bytesCount The number of bytes in the text 772 * @param count The number of glyphs in the text 773 * @param positions The x, y positions of individual glyphs (or NULL) 774 * @param fontRenderer The font renderer object 775 * @param alpha The alpha value for drawing the shadow 776 * @param mode The xfermode for drawing the shadow 777 * @param x The x coordinate where the shadow will be drawn 778 * @param y The y coordinate where the shadow will be drawn 779 */ 780 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 781 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 782 float x, float y); 783 784 /** 785 * Draws a path texture. Path textures are alpha8 bitmaps that need special 786 * compositing to apply colors/filters/etc. 787 * 788 * @param texture The texture to render 789 * @param x The x coordinate where the texture will be drawn 790 * @param y The y coordinate where the texture will be drawn 791 * @param paint The paint to draw the texture with 792 */ 793 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 794 795 /** 796 * Resets the texture coordinates stored in mMeshVertices. Setting the values 797 * back to default is achieved by calling: 798 * 799 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 800 * 801 * @param u1 The left coordinate of the texture 802 * @param v1 The bottom coordinate of the texture 803 * @param u2 The right coordinate of the texture 804 * @param v2 The top coordinate of the texture 805 */ 806 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 807 808 /** 809 * Returns true if the specified paint will draw invisible text. 810 */ 811 bool canSkipText(const SkPaint* paint) const; 812 813 /** 814 * Binds the specified texture. The texture unit must have been selected 815 * prior to calling this method. 816 */ 817 inline void bindTexture(GLuint texture) { 818 glBindTexture(GL_TEXTURE_2D, texture); 819 } 820 821 /** 822 * Binds the specified EGLImage texture. The texture unit must have been selected 823 * prior to calling this method. 824 */ 825 inline void bindExternalTexture(GLuint texture) { 826 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 827 } 828 829 /** 830 * Enable or disable blending as necessary. This function sets the appropriate 831 * blend function based on the specified xfermode. 832 */ 833 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 834 bool swapSrcDst = false); 835 836 /** 837 * Use the specified program with the current GL context. If the program is already 838 * in use, it will not be bound again. If it is not in use, the current program is 839 * marked unused and the specified program becomes used and becomes the new 840 * current program. 841 * 842 * @param program The program to use 843 * 844 * @return true If the specified program was already in use, false otherwise. 845 */ 846 inline bool useProgram(Program* program); 847 848 /** 849 * Invoked before any drawing operation. This sets required state. 850 */ 851 void setupDraw(bool clear = true); 852 853 /** 854 * Various methods to setup OpenGL rendering. 855 */ 856 void setupDrawWithTexture(bool isAlpha8 = false); 857 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 858 void setupDrawWithExternalTexture(); 859 void setupDrawNoTexture(); 860 void setupDrawAA(); 861 void setupDrawPoint(float pointSize); 862 void setupDrawColor(int color, int alpha); 863 void setupDrawColor(float r, float g, float b, float a); 864 void setupDrawAlpha8Color(int color, int alpha); 865 void setupDrawTextGamma(const SkPaint* paint); 866 void setupDrawShader(); 867 void setupDrawColorFilter(); 868 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 869 bool swapSrcDst = false); 870 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 871 bool swapSrcDst = false); 872 void setupDrawProgram(); 873 void setupDrawDirtyRegionsDisabled(); 874 void setupDrawModelViewIdentity(bool offset = false); 875 void setupDrawModelView(float left, float top, float right, float bottom, 876 bool ignoreTransform = false, bool ignoreModelView = false); 877 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 878 bool ignoreTransform = false); 879 void setupDrawPointUniforms(); 880 void setupDrawColorUniforms(); 881 void setupDrawPureColorUniforms(); 882 void setupDrawShaderIdentityUniforms(); 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); 894 void setupDrawVertices(GLvoid* vertices); 895 void finishDrawTexture(); 896 void accountForClear(SkXfermode::Mode mode); 897 898 bool updateLayer(Layer* layer, bool inFrame); 899 void updateLayers(); 900 901 /** 902 * Renders the specified region as a series of rectangles. This method 903 * is used for debugging only. 904 */ 905 void drawRegionRects(const Region& region); 906 907 /** 908 * Renders the specified region as a series of rectangles. The region 909 * must be in screen-space coordinates. 910 */ 911 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 912 bool dirty = false); 913 914 /** 915 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 916 * is turned on. 917 */ 918 void debugClip(); 919 920 void debugOverdraw(bool enable, bool clear); 921 void renderOverdraw(); 922 923 /** 924 * Should be invoked every time the glScissor is modified. 925 */ 926 inline void dirtyClip() { 927 mDirtyClip = true; 928 } 929 930 inline mat4& currentTransform() const { 931 return *mSnapshot->transform; 932 } 933 934 // Dimensions of the drawing surface 935 int mWidth, mHeight; 936 937 // Matrix used for ortho projection in shaders 938 mat4 mOrthoMatrix; 939 940 // Model-view matrix used to position/size objects 941 mat4 mModelView; 942 943 // Number of saved states 944 int mSaveCount; 945 // Base state 946 sp<Snapshot> mFirstSnapshot; 947 // Current state 948 sp<Snapshot> mSnapshot; 949 // State used to define the clipping region 950 sp<Snapshot> mTilingSnapshot; 951 952 // Used to draw textured quads 953 TextureVertex mMeshVertices[4]; 954 955 // shader, filters, and shadow 956 DrawModifiers mDrawModifiers; 957 SkPaint mFilteredPaint; 958 959 // Various caches 960 Caches& mCaches; 961 Extensions& mExtensions; 962 963 // List of rectangles to clear after saveLayer() is invoked 964 Vector<Rect*> mLayers; 965 // List of functors to invoke after a frame is drawn 966 SortedVector<Functor*> mFunctors; 967 // List of layers to update at the beginning of a frame 968 Vector<Layer*> mLayerUpdates; 969 970 // Indicates whether the clip must be restored 971 bool mDirtyClip; 972 973 // The following fields are used to setup drawing 974 // Used to describe the shaders to generate 975 ProgramDescription mDescription; 976 // Color description 977 bool mColorSet; 978 float mColorA, mColorR, mColorG, mColorB; 979 // Indicates that the shader should get a color 980 bool mSetShaderColor; 981 // Current texture unit 982 GLuint mTextureUnit; 983 // Track dirty regions, true by default 984 bool mTrackDirtyRegions; 985 // Indicate whether we are drawing an opaque frame 986 bool mOpaqueFrame; 987 988 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 989 // Properties.h 990 bool mScissorOptimizationDisabled; 991 992 // No-ops start/endTiling when set 993 bool mSuppressTiling; 994 995 // Optional name of the renderer 996 String8 mName; 997 998 friend class DisplayListRenderer; 999 friend class TextSetupFunctor; 1000 1001}; // class OpenGLRenderer 1002 1003}; // namespace uirenderer 1004}; // namespace android 1005 1006#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1007