OpenGLRenderer.h revision ff78583d8a73ca35ce65b5d2592570ff6fb9901b
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 int mMultipliedAlpha; // -1 if invalid (because caching not set) 76 77 // the below are set and used by the OpenGLRenderer at record and deferred playback 78 Rect mClip; 79 mat4 mMatrix; 80 DrawModifiers mDrawModifiers; 81 float mAlpha; 82}; 83 84/////////////////////////////////////////////////////////////////////////////// 85// Renderer 86/////////////////////////////////////////////////////////////////////////////// 87 88class DisplayList; 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 virtual void translate(float dx, float dy); 210 virtual void rotate(float degrees); 211 virtual void scale(float sx, float sy); 212 virtual void skew(float sx, float sy); 213 214 bool hasRectToRectTransform(); 215 ANDROID_API void getMatrix(SkMatrix* matrix); 216 virtual void setMatrix(SkMatrix* matrix); 217 virtual void concatMatrix(SkMatrix* matrix); 218 219 ANDROID_API const Rect& getClipBounds(); 220 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 221 bool quickRejectNoScissor(float left, float top, float right, float bottom); 222 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 223 virtual bool clipPath(SkPath* path, SkRegion::Op op); 224 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 225 virtual Rect* getClipRect(); 226 227 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags); 228 virtual void outputDisplayList(DisplayList* displayList); 229 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 230 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 231 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 232 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 233 float srcRight, float srcBottom, float dstLeft, float dstTop, 234 float dstRight, float dstBottom, SkPaint* paint); 235 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 236 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 237 float* vertices, int* colors, SkPaint* paint); 238 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 239 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 240 float left, float top, float right, float bottom, SkPaint* paint); 241 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, int alpha, SkXfermode::Mode mode); 244 virtual status_t drawColor(int color, SkXfermode::Mode mode); 245 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 246 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 247 float rx, float ry, SkPaint* paint); 248 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 249 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 250 virtual status_t drawArc(float left, float top, float right, float bottom, 251 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 252 virtual status_t drawPath(SkPath* path, SkPaint* paint); 253 virtual status_t drawLines(float* points, int count, SkPaint* paint); 254 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 255 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 256 float hOffset, float vOffset, SkPaint* paint); 257 virtual status_t drawPosText(const char* text, int bytesCount, int count, 258 const float* positions, SkPaint* paint); 259 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 260 const float* positions, SkPaint* paint, float length = -1.0f); 261 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 262 263 virtual void resetShader(); 264 virtual void setupShader(SkiaShader* shader); 265 266 virtual void resetColorFilter(); 267 virtual void setupColorFilter(SkiaColorFilter* filter); 268 269 virtual void resetShadow(); 270 virtual void setupShadow(float radius, float dx, float dy, int color); 271 272 virtual void resetPaintFilter(); 273 virtual void setupPaintFilter(int clearBits, int setBits); 274 275 SkPaint* filterPaint(SkPaint* paint, bool alwaysCopy = false); 276 277 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 278 void restoreDisplayState(const DeferredDisplayState& state, int stateDeferFlags); 279 280 // TODO: what does this mean? no perspective? no rotate? 281 ANDROID_API bool isCurrentTransformSimple() { 282 return mSnapshot->transform->isSimple(); 283 } 284 285 Caches& getCaches() { 286 return mCaches; 287 } 288 289 // simple rect clip 290 bool isCurrentClipSimple() { 291 return mSnapshot->clipRegion->isEmpty(); 292 } 293 294 /** 295 * Sets the alpha on the current snapshot. This alpha value will be modulated 296 * with other alpha values when drawing primitives. 297 */ 298 void setAlpha(float alpha) { 299 mSnapshot->alpha = alpha; 300 } 301 302 /** 303 * Inserts a named event marker in the stream of GL commands. 304 */ 305 void eventMark(const char* name) const; 306 307 /** 308 * Inserts a named group marker in the stream of GL commands. This marker 309 * can be used by tools to group commands into logical groups. A call to 310 * this method must always be followed later on by a call to endMark(). 311 */ 312 void startMark(const char* name) const; 313 314 /** 315 * Closes the last group marker opened by startMark(). 316 */ 317 void endMark() const; 318 319 /** 320 * Gets the alpha and xfermode out of a paint object. If the paint is null 321 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 322 * not multiply the paint's alpha by the current snapshot's alpha. 323 * 324 * @param paint The paint to extract values from 325 * @param alpha Where to store the resulting alpha 326 * @param mode Where to store the resulting xfermode 327 */ 328 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 329 if (paint) { 330 *mode = getXfermode(paint->getXfermode()); 331 332 // Skia draws using the color's alpha channel if < 255 333 // Otherwise, it uses the paint's alpha 334 int color = paint->getColor(); 335 *alpha = (color >> 24) & 0xFF; 336 if (*alpha == 255) { 337 *alpha = paint->getAlpha(); 338 } 339 } else { 340 *mode = SkXfermode::kSrcOver_Mode; 341 *alpha = 255; 342 } 343 } 344 345 /** 346 * Return the best transform to use to rasterize text given a full 347 * transform matrix. 348 */ 349 mat4 findBestFontTransform(const mat4& transform) const; 350 351protected: 352 /** 353 * Computes the projection matrix, initialize the first snapshot 354 * and stores the dimensions of the render target. 355 */ 356 void initViewport(int width, int height); 357 358 /** 359 * Clears the underlying surface if needed. 360 */ 361 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 362 363 /** 364 * Call this method after updating a layer during a drawing pass. 365 */ 366 void resumeAfterLayer(); 367 368 /** 369 * This method is called whenever a stencil buffer is required. Subclasses 370 * should override this method and call attachStencilBufferToLayer() on the 371 * appropriate layer(s). 372 */ 373 virtual void ensureStencilBuffer(); 374 375 /** 376 * Obtains a stencil render buffer (allocating it if necessary) and 377 * attaches it to the specified layer. 378 */ 379 void attachStencilBufferToLayer(Layer* layer); 380 381 /** 382 * Compose the layer defined in the current snapshot with the layer 383 * defined by the previous snapshot. 384 * 385 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 386 * 387 * @param curent The current snapshot containing the layer to compose 388 * @param previous The previous snapshot to compose the current layer with 389 */ 390 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 391 392 /** 393 * Marks the specified region as dirty at the specified bounds. 394 */ 395 void dirtyLayerUnchecked(Rect& bounds, Region* region); 396 397 /** 398 * Returns the current snapshot. 399 */ 400 sp<Snapshot> getSnapshot() const { 401 return mSnapshot; 402 } 403 404 /** 405 * Returns the region of the current layer. 406 */ 407 virtual Region* getRegion() const { 408 return mSnapshot->region; 409 } 410 411 /** 412 * Indicates whether rendering is currently targeted at a layer. 413 */ 414 virtual bool hasLayer() const { 415 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 416 } 417 418 /** 419 * Returns the name of the FBO this renderer is rendering into. 420 */ 421 virtual GLint getTargetFbo() const { 422 return 0; 423 } 424 425 /** 426 * Renders the specified layer as a textured quad. 427 * 428 * @param layer The layer to render 429 * @param rect The bounds of the layer 430 */ 431 void drawTextureLayer(Layer* layer, const Rect& rect); 432 433 /** 434 * Gets the alpha and xfermode out of a paint object. If the paint is null 435 * alpha will be 255 and the xfermode will be SRC_OVER. 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); 442 443 /** 444 * Safely retrieves the mode from the specified xfermode. If the specified 445 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 446 */ 447 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 448 SkXfermode::Mode resultMode; 449 if (!SkXfermode::AsMode(mode, &resultMode)) { 450 resultMode = SkXfermode::kSrcOver_Mode; 451 } 452 return resultMode; 453 } 454 455 /** 456 * Set to true to suppress error checks at the end of a frame. 457 */ 458 virtual bool suppressErrorChecks() const { 459 return false; 460 } 461 462private: 463 /** 464 * Discards the content of the framebuffer if supported by the driver. 465 * This method should be called at the beginning of a frame to optimize 466 * rendering on some tiler architectures. 467 */ 468 void discardFramebuffer(float left, float top, float right, float bottom); 469 470 /** 471 * Ensures the state of the renderer is the same as the state of 472 * the GL context. 473 */ 474 void syncState(); 475 476 /** 477 * Tells the GPU what part of the screen is about to be redrawn. 478 * This method will use the clip rect that we started drawing the 479 * frame with. 480 * This method needs to be invoked every time getTargetFbo() is 481 * bound again. 482 */ 483 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 484 485 /** 486 * Tells the GPU what part of the screen is about to be redrawn. 487 * This method needs to be invoked every time getTargetFbo() is 488 * bound again. 489 */ 490 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 491 492 /** 493 * Tells the GPU that we are done drawing the frame or that we 494 * are switching to another render target. 495 */ 496 void endTiling(); 497 498 /** 499 * Saves the current state of the renderer as a new snapshot. 500 * The new snapshot is saved in mSnapshot and the previous snapshot 501 * is linked from mSnapshot->previous. 502 * 503 * @param flags The save flags; see SkCanvas for more information 504 * 505 * @return The new save count. This value can be passed to #restoreToCount() 506 */ 507 int saveSnapshot(int flags); 508 509 /** 510 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 511 * 512 * @return True if the clip was modified. 513 */ 514 bool restoreSnapshot(); 515 516 /** 517 * Sets the clipping rectangle using glScissor. The clip is defined by 518 * the current snapshot's clipRect member. 519 */ 520 void setScissorFromClip(); 521 522 /** 523 * Sets the clipping region using the stencil buffer. The clip region 524 * is defined by the current snapshot's clipRegion member. 525 */ 526 void setStencilFromClip(); 527 528 /** 529 * Performs a quick reject but does not affect the scissor. Returns 530 * the transformed rect to test and the current clip. 531 */ 532 bool quickRejectNoScissor(float left, float top, float right, float bottom, 533 Rect& transformed, Rect& clip); 534 535 /** 536 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 537 */ 538 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 539 540 /** 541 * Creates a new layer stored in the specified snapshot. 542 * 543 * @param snapshot The snapshot associated with the new layer 544 * @param left The left coordinate of the layer 545 * @param top The top coordinate of the layer 546 * @param right The right coordinate of the layer 547 * @param bottom The bottom coordinate of the layer 548 * @param alpha The translucency of the layer 549 * @param mode The blending mode of the layer 550 * @param flags The layer save flags 551 * @param previousFbo The name of the current framebuffer 552 * 553 * @return True if the layer was successfully created, false otherwise 554 */ 555 bool createLayer(float left, float top, float right, float bottom, 556 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 557 558 /** 559 * Creates a new layer stored in the specified snapshot as an FBO. 560 * 561 * @param layer The layer to store as an FBO 562 * @param snapshot The snapshot associated with the new layer 563 * @param bounds The bounds of the layer 564 * @param previousFbo The name of the current framebuffer 565 */ 566 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 567 568 /** 569 * Compose the specified layer as a region. 570 * 571 * @param layer The layer to compose 572 * @param rect The layer's bounds 573 */ 574 void composeLayerRegion(Layer* layer, const Rect& rect); 575 576 /** 577 * Compose the specified layer as a simple rectangle. 578 * 579 * @param layer The layer to compose 580 * @param rect The layer's bounds 581 * @param swap If true, the source and destination are swapped 582 */ 583 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 584 585 /** 586 * Clears all the regions corresponding to the current list of layers. 587 * This method MUST be invoked before any drawing operation. 588 */ 589 void clearLayerRegions(); 590 591 /** 592 * Mark the layer as dirty at the specified coordinates. The coordinates 593 * are transformed with the supplied matrix. 594 */ 595 void dirtyLayer(const float left, const float top, 596 const float right, const float bottom, const mat4 transform); 597 598 /** 599 * Mark the layer as dirty at the specified coordinates. 600 */ 601 void dirtyLayer(const float left, const float top, 602 const float right, const float bottom); 603 604 /** 605 * Draws a colored rectangle with the specified color. The specified coordinates 606 * are transformed by the current snapshot's transform matrix unless specified 607 * otherwise. 608 * 609 * @param left The left coordinate of the rectangle 610 * @param top The top coordinate of the rectangle 611 * @param right The right coordinate of the rectangle 612 * @param bottom The bottom coordinate of the rectangle 613 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 614 * @param mode The Skia xfermode to use 615 * @param ignoreTransform True if the current transform should be ignored 616 */ 617 void drawColorRect(float left, float top, float right, float bottom, 618 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 619 620 /** 621 * Draws a series of colored rectangles with the specified color. The specified 622 * coordinates are transformed by the current snapshot's transform matrix unless 623 * specified otherwise. 624 * 625 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 626 * per rectangle 627 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 628 * @param mode The Skia xfermode to use 629 * @param ignoreTransform True if the current transform should be ignored 630 * @param dirty True if calling this method should dirty the current layer 631 * @param clip True if the rects should be clipped, false otherwise 632 */ 633 status_t drawColorRects(const float* rects, int count, int color, 634 SkXfermode::Mode mode, bool ignoreTransform = false, 635 bool dirty = true, bool clip = true); 636 637 /** 638 * Draws the shape represented by the specified path texture. 639 * This method invokes drawPathTexture() but takes into account 640 * the extra left/top offset and the texture offset to correctly 641 * position the final shape. 642 * 643 * @param left The left coordinate of the shape to render 644 * @param top The top coordinate of the shape to render 645 * @param texture The texture reprsenting the shape 646 * @param paint The paint to draw the shape with 647 */ 648 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 649 650 /** 651 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 652 * different compositing rules. 653 * 654 * @param texture The texture to draw with 655 * @param left The x coordinate of the bitmap 656 * @param top The y coordinate of the bitmap 657 * @param paint The paint to render with 658 */ 659 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 660 661 /** 662 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 663 * 664 * @param vertexBuffer The VertexBuffer to be drawn 665 * @param paint The paint to render with 666 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 667 */ 668 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 669 bool useOffset = false); 670 671 /** 672 * Renders the convex hull defined by the specified path as a strip of polygons. 673 * 674 * @param path The hull of the path to draw 675 * @param paint The paint to render with 676 */ 677 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 678 679 /** 680 * Draws a textured rectangle with the specified texture. The specified coordinates 681 * are transformed by the current snapshot's transform matrix. 682 * 683 * @param left The left coordinate of the rectangle 684 * @param top The top coordinate of the rectangle 685 * @param right The right coordinate of the rectangle 686 * @param bottom The bottom coordinate of the rectangle 687 * @param texture The texture name to map onto the rectangle 688 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 689 * @param mode The blending mode 690 * @param blend True if the texture contains an alpha channel 691 */ 692 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 693 float alpha, SkXfermode::Mode mode, bool blend); 694 695 /** 696 * Draws a textured rectangle with the specified texture. The specified coordinates 697 * are transformed by the current snapshot's transform matrix. 698 * 699 * @param left The left coordinate of the rectangle 700 * @param top The top coordinate of the rectangle 701 * @param right The right coordinate of the rectangle 702 * @param bottom The bottom coordinate of the rectangle 703 * @param texture The texture to use 704 * @param paint The paint containing the alpha, blending mode, etc. 705 */ 706 void drawTextureRect(float left, float top, float right, float bottom, 707 Texture* texture, SkPaint* paint); 708 709 /** 710 * Draws a textured mesh with the specified texture. If the indices are omitted, 711 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 712 * VBO is bound. 713 * 714 * @param left The left coordinate of the rectangle 715 * @param top The top coordinate of the rectangle 716 * @param right The right coordinate of the rectangle 717 * @param bottom The bottom coordinate of the rectangle 718 * @param texture The texture name to map onto the rectangle 719 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 720 * @param mode The blending mode 721 * @param blend True if the texture contains an alpha channel 722 * @param vertices The vertices that define the mesh 723 * @param texCoords The texture coordinates of each vertex 724 * @param elementsCount The number of elements in the mesh, required by indices 725 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 726 * @param ignoreTransform True if the current transform should be ignored 727 * @param vbo The VBO used to draw the mesh 728 * @param ignoreScale True if the model view matrix should not be scaled 729 * @param dirty True if calling this method should dirty the current layer 730 */ 731 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 732 float alpha, SkXfermode::Mode mode, bool blend, 733 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 734 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 735 bool ignoreScale = false, bool dirty = true); 736 737 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 738 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 739 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 740 bool ignoreTransform, bool dirty = true); 741 742 /** 743 * Draws text underline and strike-through if needed. 744 * 745 * @param text The text to decor 746 * @param bytesCount The number of bytes in the text 747 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 748 * @param x The x coordinate where the text will be drawn 749 * @param y The y coordinate where the text will be drawn 750 * @param paint The paint to draw the text with 751 */ 752 void drawTextDecorations(const char* text, int bytesCount, float length, 753 float x, float y, SkPaint* paint); 754 755 /** 756 * Draws shadow layer on text (with optional positions). 757 * 758 * @param paint The paint to draw the shadow with 759 * @param text The text to draw 760 * @param bytesCount The number of bytes in the text 761 * @param count The number of glyphs in the text 762 * @param positions The x, y positions of individual glyphs (or NULL) 763 * @param fontRenderer The font renderer object 764 * @param alpha The alpha value for drawing the shadow 765 * @param mode The xfermode for drawing the shadow 766 * @param x The x coordinate where the shadow will be drawn 767 * @param y The y coordinate where the shadow will be drawn 768 */ 769 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 770 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 771 float x, float y); 772 773 /** 774 * Draws a path texture. Path textures are alpha8 bitmaps that need special 775 * compositing to apply colors/filters/etc. 776 * 777 * @param texture The texture to render 778 * @param x The x coordinate where the texture will be drawn 779 * @param y The y coordinate where the texture will be drawn 780 * @param paint The paint to draw the texture with 781 */ 782 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 783 784 /** 785 * Resets the texture coordinates stored in mMeshVertices. Setting the values 786 * back to default is achieved by calling: 787 * 788 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 789 * 790 * @param u1 The left coordinate of the texture 791 * @param v1 The bottom coordinate of the texture 792 * @param u2 The right coordinate of the texture 793 * @param v2 The top coordinate of the texture 794 */ 795 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 796 797 /** 798 * Returns true if the specified paint will draw invisible text. 799 */ 800 bool canSkipText(const SkPaint* paint) const; 801 802 /** 803 * Binds the specified texture. The texture unit must have been selected 804 * prior to calling this method. 805 */ 806 inline void bindTexture(GLuint texture) { 807 glBindTexture(GL_TEXTURE_2D, texture); 808 } 809 810 /** 811 * Binds the specified EGLImage texture. The texture unit must have been selected 812 * prior to calling this method. 813 */ 814 inline void bindExternalTexture(GLuint texture) { 815 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 816 } 817 818 /** 819 * Enable or disable blending as necessary. This function sets the appropriate 820 * blend function based on the specified xfermode. 821 */ 822 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 823 bool swapSrcDst = false); 824 825 /** 826 * Use the specified program with the current GL context. If the program is already 827 * in use, it will not be bound again. If it is not in use, the current program is 828 * marked unused and the specified program becomes used and becomes the new 829 * current program. 830 * 831 * @param program The program to use 832 * 833 * @return true If the specified program was already in use, false otherwise. 834 */ 835 inline bool useProgram(Program* program); 836 837 /** 838 * Invoked before any drawing operation. This sets required state. 839 */ 840 void setupDraw(bool clear = true); 841 842 /** 843 * Various methods to setup OpenGL rendering. 844 */ 845 void setupDrawWithTexture(bool isAlpha8 = false); 846 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 847 void setupDrawWithExternalTexture(); 848 void setupDrawNoTexture(); 849 void setupDrawAA(); 850 void setupDrawPoint(float pointSize); 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 void setupDrawModelViewIdentity(bool offset = false); 864 void setupDrawModelView(float left, float top, float right, float bottom, 865 bool ignoreTransform = false, bool ignoreModelView = false); 866 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 867 bool ignoreTransform = false); 868 void setupDrawPointUniforms(); 869 void setupDrawColorUniforms(); 870 void setupDrawPureColorUniforms(); 871 void setupDrawShaderIdentityUniforms(); 872 void setupDrawShaderUniforms(bool ignoreTransform = false); 873 void setupDrawColorFilterUniforms(); 874 void setupDrawSimpleMesh(); 875 void setupDrawTexture(GLuint texture); 876 void setupDrawExternalTexture(GLuint texture); 877 void setupDrawTextureTransform(); 878 void setupDrawTextureTransformUniforms(mat4& transform); 879 void setupDrawTextGammaUniforms(); 880 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 881 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 882 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 883 void setupDrawVertices(GLvoid* vertices); 884 void finishDrawTexture(); 885 void accountForClear(SkXfermode::Mode mode); 886 887 bool updateLayer(Layer* layer, bool inFrame); 888 void updateLayers(); 889 890 /** 891 * Renders the specified region as a series of rectangles. This method 892 * is used for debugging only. 893 */ 894 void drawRegionRects(const Region& region); 895 896 /** 897 * Renders the specified region as a series of rectangles. The region 898 * must be in screen-space coordinates. 899 */ 900 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 901 bool dirty = false); 902 903 /** 904 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 905 * is turned on. 906 */ 907 void debugClip(); 908 909 void debugOverdraw(bool enable, bool clear); 910 void renderOverdraw(); 911 912 /** 913 * Should be invoked every time the glScissor is modified. 914 */ 915 inline void dirtyClip() { 916 mDirtyClip = true; 917 } 918 919 inline mat4& currentTransform() const { 920 return *mSnapshot->transform; 921 } 922 923 // Dimensions of the drawing surface 924 int mWidth, mHeight; 925 926 // Matrix used for ortho projection in shaders 927 mat4 mOrthoMatrix; 928 929 // Model-view matrix used to position/size objects 930 mat4 mModelView; 931 932 // Number of saved states 933 int mSaveCount; 934 // Base state 935 sp<Snapshot> mFirstSnapshot; 936 // Current state 937 sp<Snapshot> mSnapshot; 938 // State used to define the clipping region 939 sp<Snapshot> mTilingSnapshot; 940 941 // Used to draw textured quads 942 TextureVertex mMeshVertices[4]; 943 944 // shader, filters, and shadow 945 DrawModifiers mDrawModifiers; 946 SkPaint mFilteredPaint; 947 948 // Various caches 949 Caches& mCaches; 950 Extensions& mExtensions; 951 952 // List of rectangles to clear after saveLayer() is invoked 953 Vector<Rect*> mLayers; 954 // List of functors to invoke after a frame is drawn 955 SortedVector<Functor*> mFunctors; 956 // List of layers to update at the beginning of a frame 957 Vector<Layer*> mLayerUpdates; 958 959 // Indicates whether the clip must be restored 960 bool mDirtyClip; 961 962 // The following fields are used to setup drawing 963 // Used to describe the shaders to generate 964 ProgramDescription mDescription; 965 // Color description 966 bool mColorSet; 967 float mColorA, mColorR, mColorG, mColorB; 968 // Indicates that the shader should get a color 969 bool mSetShaderColor; 970 // Current texture unit 971 GLuint mTextureUnit; 972 // Track dirty regions, true by default 973 bool mTrackDirtyRegions; 974 // Indicate whether we are drawing an opaque frame 975 bool mOpaqueFrame; 976 977 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 978 // Properties.h 979 bool mScissorOptimizationDisabled; 980 981 // No-ops start/endTiling when set 982 bool mSuppressTiling; 983 984 // Optional name of the renderer 985 String8 mName; 986 987 friend class DisplayListRenderer; 988 989}; // class OpenGLRenderer 990 991}; // namespace uirenderer 992}; // namespace android 993 994#endif // ANDROID_HWUI_OPENGL_RENDERER_H 995