OpenGLRenderer.h revision 3b753829ae858d424fe109f714745379a6daf455
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 68struct DeferredDisplayState { 69 Rect mBounds; // local bounds, mapped with matrix to be in screen space coordinates, clipped. 70 int mMultipliedAlpha; // -1 if invalid (because caching not set) 71 72 // the below are set and used by the OpenGLRenderer at record and deferred playback 73 Rect mClip; 74 mat4 mMatrix; 75 SkiaShader* mShader; 76 DrawModifiers mDrawModifiers; 77}; 78 79/////////////////////////////////////////////////////////////////////////////// 80// Renderer 81/////////////////////////////////////////////////////////////////////////////// 82 83class DisplayList; 84class VertexBuffer; 85 86/** 87 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 88 * simplified version of Skia's Canvas API. 89 */ 90class OpenGLRenderer { 91public: 92 ANDROID_API OpenGLRenderer(); 93 virtual ~OpenGLRenderer(); 94 95 /** 96 * Sets the name of this renderer. The name is optional and 97 * empty by default. If the pointer is null the name is set 98 * to the empty string. 99 */ 100 ANDROID_API void setName(const char* name); 101 102 /** 103 * Returns the name of this renderer as UTF8 string. 104 * The returned pointer is never null. 105 */ 106 ANDROID_API const char* getName() const; 107 108 /** 109 * Read externally defined properties to control the behavior 110 * of the renderer. 111 */ 112 ANDROID_API void initProperties(); 113 114 /** 115 * Indicates whether this renderer executes drawing commands immediately. 116 * If this method returns true, the drawing commands will be executed 117 * later. 118 */ 119 virtual bool isDeferred(); 120 121 /** 122 * Sets the dimension of the underlying drawing surface. This method must 123 * be called at least once every time the drawing surface changes size. 124 * 125 * @param width The width in pixels of the underlysing surface 126 * @param height The height in pixels of the underlysing surface 127 */ 128 virtual void setViewport(int width, int height); 129 130 /** 131 * Prepares the renderer to draw a frame. This method must be invoked 132 * at the beginning of each frame. When this method is invoked, the 133 * entire drawing surface is assumed to be redrawn. 134 * 135 * @param opaque If true, the target surface is considered opaque 136 * and will not be cleared. If false, the target surface 137 * will be cleared 138 */ 139 ANDROID_API status_t prepare(bool opaque); 140 141 /** 142 * Prepares the renderer to draw a frame. This method must be invoked 143 * at the beginning of each frame. Only the specified rectangle of the 144 * frame is assumed to be dirty. A clip will automatically be set to 145 * the specified rectangle. 146 * 147 * @param left The left coordinate of the dirty rectangle 148 * @param top The top coordinate of the dirty rectangle 149 * @param right The right coordinate of the dirty rectangle 150 * @param bottom The bottom coordinate of the dirty rectangle 151 * @param opaque If true, the target surface is considered opaque 152 * and will not be cleared. If false, the target surface 153 * will be cleared in the specified dirty rectangle 154 */ 155 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 156 157 /** 158 * Indicates the end of a frame. This method must be invoked whenever 159 * the caller is done rendering a frame. 160 */ 161 virtual void finish(); 162 163 /** 164 * This method must be invoked before handing control over to a draw functor. 165 * See callDrawGLFunction() for instance. 166 * 167 * This command must not be recorded inside display lists. 168 */ 169 virtual void interrupt(); 170 171 /** 172 * This method must be invoked after getting control back from a draw functor. 173 * 174 * This command must not be recorded inside display lists. 175 */ 176 virtual void resume(); 177 178 ANDROID_API status_t invokeFunctors(Rect& dirty); 179 ANDROID_API void detachFunctor(Functor* functor); 180 ANDROID_API void attachFunctor(Functor* functor); 181 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 182 183 ANDROID_API void pushLayerUpdate(Layer* layer); 184 ANDROID_API void clearLayerUpdates(); 185 186 ANDROID_API int getSaveCount() const; 187 virtual int save(int flags); 188 virtual void restore(); 189 virtual void restoreToCount(int saveCount); 190 191 virtual int saveLayer(float left, float top, float right, float bottom, 192 SkPaint* p, int flags); 193 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 194 int alpha, int flags); 195 196 virtual void translate(float dx, float dy); 197 virtual void rotate(float degrees); 198 virtual void scale(float sx, float sy); 199 virtual void skew(float sx, float sy); 200 201 bool hasRectToRectTransform(); 202 ANDROID_API void getMatrix(SkMatrix* matrix); 203 virtual void setMatrix(SkMatrix* matrix); 204 virtual void concatMatrix(SkMatrix* matrix); 205 206 ANDROID_API const Rect& getClipBounds(); 207 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 208 bool quickRejectNoScissor(float left, float top, float right, float bottom); 209 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 210 virtual bool clipPath(SkPath* path, SkRegion::Op op); 211 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 212 virtual Rect* getClipRect(); 213 214 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags); 215 virtual void outputDisplayList(DisplayList* displayList); 216 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 217 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 218 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 219 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 220 float srcRight, float srcBottom, float dstLeft, float dstTop, 221 float dstRight, float dstBottom, SkPaint* paint); 222 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 223 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 224 float* vertices, int* colors, SkPaint* paint); 225 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 226 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 227 float left, float top, float right, float bottom, SkPaint* paint); 228 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 229 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 230 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 231 virtual status_t drawColor(int color, SkXfermode::Mode mode); 232 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 233 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 234 float rx, float ry, SkPaint* paint); 235 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 236 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 237 virtual status_t drawArc(float left, float top, float right, float bottom, 238 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 239 virtual status_t drawPath(SkPath* path, SkPaint* paint); 240 virtual status_t drawLines(float* points, int count, SkPaint* paint); 241 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 242 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 243 float hOffset, float vOffset, SkPaint* paint); 244 virtual status_t drawPosText(const char* text, int bytesCount, int count, 245 const float* positions, SkPaint* paint); 246 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 247 const float* positions, SkPaint* paint, float length = -1.0f); 248 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 249 250 virtual void resetShader(); 251 virtual void setupShader(SkiaShader* shader); 252 253 virtual void resetColorFilter(); 254 virtual void setupColorFilter(SkiaColorFilter* filter); 255 256 virtual void resetShadow(); 257 virtual void setupShadow(float radius, float dx, float dy, int color); 258 259 virtual void resetPaintFilter(); 260 virtual void setupPaintFilter(int clearBits, int setBits); 261 262 SkPaint* filterPaint(SkPaint* paint, bool alwaysCopy = false); 263 264 bool disallowDeferral() { 265 // returns true if the OpenGLRenderer's state can be completely represented by 266 // a DeferredDisplayState object 267 return !mSnapshot->clipRegion->isEmpty() || 268 mSnapshot->alpha < 1.0 || 269 (mSnapshot->flags & Snapshot::kFlagIsLayer) || 270 (mSnapshot->flags & Snapshot::kFlagFboTarget); // ensure we're not in a layer 271 } 272 273 bool storeDisplayState(DeferredDisplayState& state); 274 void restoreDisplayState(const DeferredDisplayState& state); 275 276 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 277 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 278 279 ANDROID_API bool isCurrentTransformSimple() { 280 return mSnapshot->transform->isSimple(); 281 } 282 283 Caches& getCaches() { 284 return mCaches; 285 } 286 287 /** 288 * Sets the alpha on the current snapshot. This alpha value will be modulated 289 * with other alpha values when drawing primitives. 290 */ 291 void setAlpha(float alpha) { 292 mSnapshot->alpha = alpha; 293 } 294 295 /** 296 * Inserts a named event marker in the stream of GL commands. 297 */ 298 void eventMark(const char* name) const; 299 300 /** 301 * Inserts a named group marker in the stream of GL commands. This marker 302 * can be used by tools to group commands into logical groups. A call to 303 * this method must always be followed later on by a call to endMark(). 304 */ 305 void startMark(const char* name) const; 306 307 /** 308 * Closes the last group marker opened by startMark(). 309 */ 310 void endMark() const; 311 312 /** 313 * Gets the alpha and xfermode out of a paint object. If the paint is null 314 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 315 * not multiply the paint's alpha by the current snapshot's alpha. 316 * 317 * @param paint The paint to extract values from 318 * @param alpha Where to store the resulting alpha 319 * @param mode Where to store the resulting xfermode 320 */ 321 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 322 if (paint) { 323 *mode = getXfermode(paint->getXfermode()); 324 325 // Skia draws using the color's alpha channel if < 255 326 // Otherwise, it uses the paint's alpha 327 int color = paint->getColor(); 328 *alpha = (color >> 24) & 0xFF; 329 if (*alpha == 255) { 330 *alpha = paint->getAlpha(); 331 } 332 } else { 333 *mode = SkXfermode::kSrcOver_Mode; 334 *alpha = 255; 335 } 336 } 337 338protected: 339 /** 340 * Computes the projection matrix, initialize the first snapshot 341 * and stores the dimensions of the render target. 342 */ 343 void initViewport(int width, int height); 344 345 /** 346 * Clears the underlying surface if needed. 347 */ 348 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 349 350 /** 351 * Call this method after updating a layer during a drawing pass. 352 */ 353 void resumeAfterLayer(); 354 355 /** 356 * This method is called whenever a stencil buffer is required. Subclasses 357 * should override this method and call attachStencilBufferToLayer() on the 358 * appropriate layer(s). 359 */ 360 virtual void ensureStencilBuffer(); 361 362 /** 363 * Obtains a stencil render buffer (allocating it if necessary) and 364 * attaches it to the specified layer. 365 */ 366 void attachStencilBufferToLayer(Layer* layer); 367 368 /** 369 * Compose the layer defined in the current snapshot with the layer 370 * defined by the previous snapshot. 371 * 372 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 373 * 374 * @param curent The current snapshot containing the layer to compose 375 * @param previous The previous snapshot to compose the current layer with 376 */ 377 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 378 379 /** 380 * Marks the specified region as dirty at the specified bounds. 381 */ 382 void dirtyLayerUnchecked(Rect& bounds, Region* region); 383 384 /** 385 * Returns the current snapshot. 386 */ 387 sp<Snapshot> getSnapshot() { 388 return mSnapshot; 389 } 390 391 /** 392 * Returns the region of the current layer. 393 */ 394 virtual Region* getRegion() { 395 return mSnapshot->region; 396 } 397 398 /** 399 * Indicates whether rendering is currently targeted at a layer. 400 */ 401 virtual bool hasLayer() { 402 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 403 } 404 405 /** 406 * Returns the name of the FBO this renderer is rendering into. 407 */ 408 virtual GLint getTargetFbo() { 409 return 0; 410 } 411 412 /** 413 * Renders the specified layer as a textured quad. 414 * 415 * @param layer The layer to render 416 * @param rect The bounds of the layer 417 */ 418 void drawTextureLayer(Layer* layer, const Rect& rect); 419 420 /** 421 * Gets the alpha and xfermode out of a paint object. If the paint is null 422 * alpha will be 255 and the xfermode will be SRC_OVER. 423 * 424 * @param paint The paint to extract values from 425 * @param alpha Where to store the resulting alpha 426 * @param mode Where to store the resulting xfermode 427 */ 428 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 429 430 /** 431 * Safely retrieves the mode from the specified xfermode. If the specified 432 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 433 */ 434 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 435 SkXfermode::Mode resultMode; 436 if (!SkXfermode::AsMode(mode, &resultMode)) { 437 resultMode = SkXfermode::kSrcOver_Mode; 438 } 439 return resultMode; 440 } 441 442 /** 443 * Set to true to suppress error checks at the end of a frame. 444 */ 445 virtual bool suppressErrorChecks() { 446 return false; 447 } 448 449private: 450 /** 451 * Discards the content of the framebuffer if supported by the driver. 452 * This method should be called at the beginning of a frame to optimize 453 * rendering on some tiler architectures. 454 */ 455 void discardFramebuffer(float left, float top, float right, float bottom); 456 457 /** 458 * Ensures the state of the renderer is the same as the state of 459 * the GL context. 460 */ 461 void syncState(); 462 463 /** 464 * Tells the GPU what part of the screen is about to be redrawn. 465 * This method will use the clip rect that we started drawing the 466 * frame with. 467 * This method needs to be invoked every time getTargetFbo() is 468 * bound again. 469 */ 470 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 471 472 /** 473 * Tells the GPU what part of the screen is about to be redrawn. 474 * This method needs to be invoked every time getTargetFbo() is 475 * bound again. 476 */ 477 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 478 479 /** 480 * Tells the GPU that we are done drawing the frame or that we 481 * are switching to another render target. 482 */ 483 void endTiling(); 484 485 /** 486 * Saves the current state of the renderer as a new snapshot. 487 * The new snapshot is saved in mSnapshot and the previous snapshot 488 * is linked from mSnapshot->previous. 489 * 490 * @param flags The save flags; see SkCanvas for more information 491 * 492 * @return The new save count. This value can be passed to #restoreToCount() 493 */ 494 int saveSnapshot(int flags); 495 496 /** 497 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 498 * 499 * @return True if the clip was modified. 500 */ 501 bool restoreSnapshot(); 502 503 /** 504 * Sets the clipping rectangle using glScissor. The clip is defined by 505 * the current snapshot's clipRect member. 506 */ 507 void setScissorFromClip(); 508 509 /** 510 * Sets the clipping region using the stencil buffer. The clip region 511 * is defined by the current snapshot's clipRegion member. 512 */ 513 void setStencilFromClip(); 514 515 /** 516 * Performs a quick reject but does not affect the scissor. Returns 517 * the transformed rect to test and the current clip. 518 */ 519 bool quickRejectNoScissor(float left, float top, float right, float bottom, 520 Rect& transformed, Rect& clip); 521 522 /** 523 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 524 */ 525 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 526 527 /** 528 * Creates a new layer stored in the specified snapshot. 529 * 530 * @param snapshot The snapshot associated with the new layer 531 * @param left The left coordinate of the layer 532 * @param top The top coordinate of the layer 533 * @param right The right coordinate of the layer 534 * @param bottom The bottom coordinate of the layer 535 * @param alpha The translucency of the layer 536 * @param mode The blending mode of the layer 537 * @param flags The layer save flags 538 * @param previousFbo The name of the current framebuffer 539 * 540 * @return True if the layer was successfully created, false otherwise 541 */ 542 bool createLayer(float left, float top, float right, float bottom, 543 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 544 545 /** 546 * Creates a new layer stored in the specified snapshot as an FBO. 547 * 548 * @param layer The layer to store as an FBO 549 * @param snapshot The snapshot associated with the new layer 550 * @param bounds The bounds of the layer 551 * @param previousFbo The name of the current framebuffer 552 */ 553 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 554 555 /** 556 * Compose the specified layer as a region. 557 * 558 * @param layer The layer to compose 559 * @param rect The layer's bounds 560 */ 561 void composeLayerRegion(Layer* layer, const Rect& rect); 562 563 /** 564 * Compose the specified layer as a simple rectangle. 565 * 566 * @param layer The layer to compose 567 * @param rect The layer's bounds 568 * @param swap If true, the source and destination are swapped 569 */ 570 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 571 572 /** 573 * Clears all the regions corresponding to the current list of layers. 574 * This method MUST be invoked before any drawing operation. 575 */ 576 void clearLayerRegions(); 577 578 /** 579 * Mark the layer as dirty at the specified coordinates. The coordinates 580 * are transformed with the supplied matrix. 581 */ 582 void dirtyLayer(const float left, const float top, 583 const float right, const float bottom, const mat4 transform); 584 585 /** 586 * Mark the layer as dirty at the specified coordinates. 587 */ 588 void dirtyLayer(const float left, const float top, 589 const float right, const float bottom); 590 591 /** 592 * Draws a colored rectangle with the specified color. The specified coordinates 593 * are transformed by the current snapshot's transform matrix unless specified 594 * otherwise. 595 * 596 * @param left The left coordinate of the rectangle 597 * @param top The top coordinate of the rectangle 598 * @param right The right coordinate of the rectangle 599 * @param bottom The bottom coordinate of the rectangle 600 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 601 * @param mode The Skia xfermode to use 602 * @param ignoreTransform True if the current transform should be ignored 603 */ 604 void drawColorRect(float left, float top, float right, float bottom, 605 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 606 607 /** 608 * Draws a series of colored rectangles with the specified color. The specified 609 * coordinates are transformed by the current snapshot's transform matrix unless 610 * specified otherwise. 611 * 612 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 613 * per rectangle 614 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 615 * @param mode The Skia xfermode to use 616 * @param ignoreTransform True if the current transform should be ignored 617 * @param dirty True if calling this method should dirty the current layer 618 * @param clip True if the rects should be clipped, false otherwise 619 */ 620 status_t drawColorRects(const float* rects, int count, int color, 621 SkXfermode::Mode mode, bool ignoreTransform = false, 622 bool dirty = true, bool clip = true); 623 624 /** 625 * Draws the shape represented by the specified path texture. 626 * This method invokes drawPathTexture() but takes into account 627 * the extra left/top offset and the texture offset to correctly 628 * position the final shape. 629 * 630 * @param left The left coordinate of the shape to render 631 * @param top The top coordinate of the shape to render 632 * @param texture The texture reprsenting the shape 633 * @param paint The paint to draw the shape with 634 */ 635 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 636 637 /** 638 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 639 * different compositing rules. 640 * 641 * @param texture The texture to draw with 642 * @param left The x coordinate of the bitmap 643 * @param top The y coordinate of the bitmap 644 * @param paint The paint to render with 645 */ 646 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 647 648 /** 649 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 650 * 651 * @param vertexBuffer The VertexBuffer to be drawn 652 * @param paint The paint to render with 653 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 654 */ 655 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 656 bool useOffset = false); 657 658 /** 659 * Renders the convex hull defined by the specified path as a strip of polygons. 660 * 661 * @param path The hull of the path to draw 662 * @param paint The paint to render with 663 */ 664 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 665 666 /** 667 * Draws a textured rectangle with the specified texture. The specified coordinates 668 * are transformed by the current snapshot's transform matrix. 669 * 670 * @param left The left coordinate of the rectangle 671 * @param top The top coordinate of the rectangle 672 * @param right The right coordinate of the rectangle 673 * @param bottom The bottom coordinate of the rectangle 674 * @param texture The texture name to map onto the rectangle 675 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 676 * @param mode The blending mode 677 * @param blend True if the texture contains an alpha channel 678 */ 679 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 680 float alpha, SkXfermode::Mode mode, bool blend); 681 682 /** 683 * Draws a textured rectangle with the specified texture. The specified coordinates 684 * are transformed by the current snapshot's transform matrix. 685 * 686 * @param left The left coordinate of the rectangle 687 * @param top The top coordinate of the rectangle 688 * @param right The right coordinate of the rectangle 689 * @param bottom The bottom coordinate of the rectangle 690 * @param texture The texture to use 691 * @param paint The paint containing the alpha, blending mode, etc. 692 */ 693 void drawTextureRect(float left, float top, float right, float bottom, 694 Texture* texture, SkPaint* paint); 695 696 /** 697 * Draws a textured mesh with the specified texture. If the indices are omitted, 698 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 699 * VBO is bound. 700 * 701 * @param left The left coordinate of the rectangle 702 * @param top The top coordinate of the rectangle 703 * @param right The right coordinate of the rectangle 704 * @param bottom The bottom coordinate of the rectangle 705 * @param texture The texture name to map onto the rectangle 706 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 707 * @param mode The blending mode 708 * @param blend True if the texture contains an alpha channel 709 * @param vertices The vertices that define the mesh 710 * @param texCoords The texture coordinates of each vertex 711 * @param elementsCount The number of elements in the mesh, required by indices 712 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 713 * @param ignoreTransform True if the current transform should be ignored 714 * @param vbo The VBO used to draw the mesh 715 * @param ignoreScale True if the model view matrix should not be scaled 716 * @param dirty True if calling this method should dirty the current layer 717 */ 718 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 719 float alpha, SkXfermode::Mode mode, bool blend, 720 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 721 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 722 bool ignoreScale = false, bool dirty = true); 723 724 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 725 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 726 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 727 bool ignoreTransform, bool dirty = true); 728 729 /** 730 * Draws text underline and strike-through if needed. 731 * 732 * @param text The text to decor 733 * @param bytesCount The number of bytes in the text 734 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 735 * @param x The x coordinate where the text will be drawn 736 * @param y The y coordinate where the text will be drawn 737 * @param paint The paint to draw the text with 738 */ 739 void drawTextDecorations(const char* text, int bytesCount, float length, 740 float x, float y, SkPaint* paint); 741 742 /** 743 * Draws shadow layer on text (with optional positions). 744 * 745 * @param paint The paint to draw the shadow with 746 * @param text The text to draw 747 * @param bytesCount The number of bytes in the text 748 * @param count The number of glyphs in the text 749 * @param positions The x, y positions of individual glyphs (or NULL) 750 * @param fontRenderer The font renderer object 751 * @param alpha The alpha value for drawing the shadow 752 * @param mode The xfermode for drawing the shadow 753 * @param x The x coordinate where the shadow will be drawn 754 * @param y The y coordinate where the shadow will be drawn 755 */ 756 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 757 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 758 float x, float y); 759 760 /** 761 * Draws a path texture. Path textures are alpha8 bitmaps that need special 762 * compositing to apply colors/filters/etc. 763 * 764 * @param texture The texture to render 765 * @param x The x coordinate where the texture will be drawn 766 * @param y The y coordinate where the texture will be drawn 767 * @param paint The paint to draw the texture with 768 */ 769 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 770 771 /** 772 * Resets the texture coordinates stored in mMeshVertices. Setting the values 773 * back to default is achieved by calling: 774 * 775 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 776 * 777 * @param u1 The left coordinate of the texture 778 * @param v1 The bottom coordinate of the texture 779 * @param u2 The right coordinate of the texture 780 * @param v2 The top coordinate of the texture 781 */ 782 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 783 784 /** 785 * Returns true if the specified paint will draw invisible text. 786 */ 787 bool canSkipText(const SkPaint* paint) const; 788 789 /** 790 * Binds the specified texture. The texture unit must have been selected 791 * prior to calling this method. 792 */ 793 inline void bindTexture(GLuint texture) { 794 glBindTexture(GL_TEXTURE_2D, texture); 795 } 796 797 /** 798 * Binds the specified EGLImage texture. The texture unit must have been selected 799 * prior to calling this method. 800 */ 801 inline void bindExternalTexture(GLuint texture) { 802 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 803 } 804 805 /** 806 * Enable or disable blending as necessary. This function sets the appropriate 807 * blend function based on the specified xfermode. 808 */ 809 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 810 bool swapSrcDst = false); 811 812 /** 813 * Use the specified program with the current GL context. If the program is already 814 * in use, it will not be bound again. If it is not in use, the current program is 815 * marked unused and the specified program becomes used and becomes the new 816 * current program. 817 * 818 * @param program The program to use 819 * 820 * @return true If the specified program was already in use, false otherwise. 821 */ 822 inline bool useProgram(Program* program); 823 824 /** 825 * Invoked before any drawing operation. This sets required state. 826 */ 827 void setupDraw(bool clear = true); 828 829 /** 830 * Various methods to setup OpenGL rendering. 831 */ 832 void setupDrawWithTexture(bool isAlpha8 = false); 833 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 834 void setupDrawWithExternalTexture(); 835 void setupDrawNoTexture(); 836 void setupDrawAA(); 837 void setupDrawPoint(float pointSize); 838 void setupDrawColor(int color, int alpha); 839 void setupDrawColor(float r, float g, float b, float a); 840 void setupDrawAlpha8Color(int color, int alpha); 841 void setupDrawTextGamma(const SkPaint* paint); 842 void setupDrawShader(); 843 void setupDrawColorFilter(); 844 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 845 bool swapSrcDst = false); 846 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 847 bool swapSrcDst = false); 848 void setupDrawProgram(); 849 void setupDrawDirtyRegionsDisabled(); 850 void setupDrawModelViewIdentity(bool offset = false); 851 void setupDrawModelView(float left, float top, float right, float bottom, 852 bool ignoreTransform = false, bool ignoreModelView = false); 853 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 854 bool ignoreTransform = false); 855 void setupDrawPointUniforms(); 856 void setupDrawColorUniforms(); 857 void setupDrawPureColorUniforms(); 858 void setupDrawShaderIdentityUniforms(); 859 void setupDrawShaderUniforms(bool ignoreTransform = false); 860 void setupDrawColorFilterUniforms(); 861 void setupDrawSimpleMesh(); 862 void setupDrawTexture(GLuint texture); 863 void setupDrawExternalTexture(GLuint texture); 864 void setupDrawTextureTransform(); 865 void setupDrawTextureTransformUniforms(mat4& transform); 866 void setupDrawTextGammaUniforms(); 867 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 868 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 869 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 870 void setupDrawVertices(GLvoid* vertices); 871 void finishDrawTexture(); 872 void accountForClear(SkXfermode::Mode mode); 873 874 bool updateLayer(Layer* layer, bool inFrame); 875 void updateLayers(); 876 877 /** 878 * Renders the specified region as a series of rectangles. This method 879 * is used for debugging only. 880 */ 881 void drawRegionRects(const Region& region); 882 883 /** 884 * Renders the specified region as a series of rectangles. The region 885 * must be in screen-space coordinates. 886 */ 887 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 888 bool dirty = false); 889 890 /** 891 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 892 * is turned on. 893 */ 894 void debugClip(); 895 896 void debugOverdraw(bool enable, bool clear); 897 void renderOverdraw(); 898 899 /** 900 * Should be invoked every time the glScissor is modified. 901 */ 902 inline void dirtyClip() { 903 mDirtyClip = true; 904 } 905 906 inline mat4& currentTransform() const { 907 return *mSnapshot->transform; 908 } 909 910 // Dimensions of the drawing surface 911 int mWidth, mHeight; 912 913 // Matrix used for ortho projection in shaders 914 mat4 mOrthoMatrix; 915 916 // Model-view matrix used to position/size objects 917 mat4 mModelView; 918 919 // Number of saved states 920 int mSaveCount; 921 // Base state 922 sp<Snapshot> mFirstSnapshot; 923 // Current state 924 sp<Snapshot> mSnapshot; 925 // State used to define the clipping region 926 sp<Snapshot> mTilingSnapshot; 927 928 // Used to draw textured quads 929 TextureVertex mMeshVertices[4]; 930 931 // shader, filters, and shadow 932 DrawModifiers mDrawModifiers; 933 SkPaint mFilteredPaint; 934 935 // Various caches 936 Caches& mCaches; 937 Extensions& mExtensions; 938 939 // List of rectangles to clear after saveLayer() is invoked 940 Vector<Rect*> mLayers; 941 // List of functors to invoke after a frame is drawn 942 SortedVector<Functor*> mFunctors; 943 // List of layers to update at the beginning of a frame 944 Vector<Layer*> mLayerUpdates; 945 946 // Indicates whether the clip must be restored 947 bool mDirtyClip; 948 949 // The following fields are used to setup drawing 950 // Used to describe the shaders to generate 951 ProgramDescription mDescription; 952 // Color description 953 bool mColorSet; 954 float mColorA, mColorR, mColorG, mColorB; 955 // Indicates that the shader should get a color 956 bool mSetShaderColor; 957 // Current texture unit 958 GLuint mTextureUnit; 959 // Track dirty regions, true by default 960 bool mTrackDirtyRegions; 961 // Indicate whether we are drawing an opaque frame 962 bool mOpaqueFrame; 963 964 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 965 // Properties.h 966 bool mScissorOptimizationDisabled; 967 968 // No-ops start/endTiling when set 969 bool mSuppressTiling; 970 971 // Optional name of the renderer 972 String8 mName; 973 974 friend class DisplayListRenderer; 975 976}; // class OpenGLRenderer 977 978}; // namespace uirenderer 979}; // namespace android 980 981#endif // ANDROID_HWUI_OPENGL_RENDERER_H 982