OpenGLRenderer.h revision a6456d0d7ea2a65474b8a3db5dbf001880c40a71
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 disallowReorder() { return mDrawReorderDisabled; } 274 275 bool storeDisplayState(DeferredDisplayState& state); 276 void restoreDisplayState(const DeferredDisplayState& state); 277 278 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 279 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 280 281 ANDROID_API bool isCurrentTransformSimple() { 282 return mSnapshot->transform->isSimple(); 283 } 284 285 /** 286 * Sets the alpha on the current snapshot. This alpha value will be modulated 287 * with other alpha values when drawing primitives. 288 */ 289 void setAlpha(float alpha) { 290 mSnapshot->alpha = alpha; 291 } 292 293 /** 294 * Inserts a named group marker in the stream of GL commands. This marker 295 * can be used by tools to group commands into logical groups. A call to 296 * this method must always be followed later on by a call to endMark(). 297 */ 298 void startMark(const char* name) const; 299 300 /** 301 * Closes the last group marker opened by startMark(). 302 */ 303 void endMark() const; 304 305 /** 306 * Gets the alpha and xfermode out of a paint object. If the paint is null 307 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 308 * not multiply the paint's alpha by the current snapshot's alpha. 309 * 310 * @param paint The paint to extract values from 311 * @param alpha Where to store the resulting alpha 312 * @param mode Where to store the resulting xfermode 313 */ 314 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 315 if (paint) { 316 *mode = getXfermode(paint->getXfermode()); 317 318 // Skia draws using the color's alpha channel if < 255 319 // Otherwise, it uses the paint's alpha 320 int color = paint->getColor(); 321 *alpha = (color >> 24) & 0xFF; 322 if (*alpha == 255) { 323 *alpha = paint->getAlpha(); 324 } 325 } else { 326 *mode = SkXfermode::kSrcOver_Mode; 327 *alpha = 255; 328 } 329 } 330 331protected: 332 /** 333 * Computes the projection matrix, initialize the first snapshot 334 * and stores the dimensions of the render target. 335 */ 336 void initViewport(int width, int height); 337 338 /** 339 * Clears the underlying surface if needed. 340 */ 341 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 342 343 /** 344 * Call this method after updating a layer during a drawing pass. 345 */ 346 void resumeAfterLayer(); 347 348 /** 349 * This method is called whenever a stencil buffer is required. Subclasses 350 * should override this method and call attachStencilBufferToLayer() on the 351 * appropriate layer(s). 352 */ 353 virtual void ensureStencilBuffer(); 354 355 /** 356 * Obtains a stencil render buffer (allocating it if necessary) and 357 * attaches it to the specified layer. 358 */ 359 void attachStencilBufferToLayer(Layer* layer); 360 361 /** 362 * Compose the layer defined in the current snapshot with the layer 363 * defined by the previous snapshot. 364 * 365 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 366 * 367 * @param curent The current snapshot containing the layer to compose 368 * @param previous The previous snapshot to compose the current layer with 369 */ 370 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 371 372 /** 373 * Marks the specified region as dirty at the specified bounds. 374 */ 375 void dirtyLayerUnchecked(Rect& bounds, Region* region); 376 377 /** 378 * Returns the current snapshot. 379 */ 380 sp<Snapshot> getSnapshot() { 381 return mSnapshot; 382 } 383 384 /** 385 * Returns the region of the current layer. 386 */ 387 virtual Region* getRegion() { 388 return mSnapshot->region; 389 } 390 391 /** 392 * Indicates whether rendering is currently targeted at a layer. 393 */ 394 virtual bool hasLayer() { 395 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 396 } 397 398 /** 399 * Returns the name of the FBO this renderer is rendering into. 400 */ 401 virtual GLint getTargetFbo() { 402 return 0; 403 } 404 405 /** 406 * Renders the specified layer as a textured quad. 407 * 408 * @param layer The layer to render 409 * @param rect The bounds of the layer 410 */ 411 void drawTextureLayer(Layer* layer, const Rect& rect); 412 413 /** 414 * Gets the alpha and xfermode out of a paint object. If the paint is null 415 * alpha will be 255 and the xfermode will be SRC_OVER. 416 * 417 * @param paint The paint to extract values from 418 * @param alpha Where to store the resulting alpha 419 * @param mode Where to store the resulting xfermode 420 */ 421 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 422 423 /** 424 * Safely retrieves the mode from the specified xfermode. If the specified 425 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 426 */ 427 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 428 SkXfermode::Mode resultMode; 429 if (!SkXfermode::AsMode(mode, &resultMode)) { 430 resultMode = SkXfermode::kSrcOver_Mode; 431 } 432 return resultMode; 433 } 434 435 /** 436 * Set to true to suppress error checks at the end of a frame. 437 */ 438 virtual bool suppressErrorChecks() { 439 return false; 440 } 441 442 Caches& getCaches() { 443 return mCaches; 444 } 445 446private: 447 /** 448 * Discards the content of the framebuffer if supported by the driver. 449 * This method should be called at the beginning of a frame to optimize 450 * rendering on some tiler architectures. 451 */ 452 void discardFramebuffer(float left, float top, float right, float bottom); 453 454 /** 455 * Ensures the state of the renderer is the same as the state of 456 * the GL context. 457 */ 458 void syncState(); 459 460 /** 461 * Tells the GPU what part of the screen is about to be redrawn. 462 * This method will use the clip rect that we started drawing the 463 * frame with. 464 * This method needs to be invoked every time getTargetFbo() is 465 * bound again. 466 */ 467 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 468 469 /** 470 * Tells the GPU what part of the screen is about to be redrawn. 471 * This method needs to be invoked every time getTargetFbo() is 472 * bound again. 473 */ 474 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 475 476 /** 477 * Tells the GPU that we are done drawing the frame or that we 478 * are switching to another render target. 479 */ 480 void endTiling(); 481 482 /** 483 * Saves the current state of the renderer as a new snapshot. 484 * The new snapshot is saved in mSnapshot and the previous snapshot 485 * is linked from mSnapshot->previous. 486 * 487 * @param flags The save flags; see SkCanvas for more information 488 * 489 * @return The new save count. This value can be passed to #restoreToCount() 490 */ 491 int saveSnapshot(int flags); 492 493 /** 494 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 495 * 496 * @return True if the clip was modified. 497 */ 498 bool restoreSnapshot(); 499 500 /** 501 * Sets the clipping rectangle using glScissor. The clip is defined by 502 * the current snapshot's clipRect member. 503 */ 504 void setScissorFromClip(); 505 506 /** 507 * Sets the clipping region using the stencil buffer. The clip region 508 * is defined by the current snapshot's clipRegion member. 509 */ 510 void setStencilFromClip(); 511 512 /** 513 * Performs a quick reject but does not affect the scissor. Returns 514 * the transformed rect to test and the current clip. 515 */ 516 bool quickRejectNoScissor(float left, float top, float right, float bottom, 517 Rect& transformed, Rect& clip); 518 519 /** 520 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 521 */ 522 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 523 524 /** 525 * Creates a new layer stored in the specified snapshot. 526 * 527 * @param snapshot The snapshot associated with the new layer 528 * @param left The left coordinate of the layer 529 * @param top The top coordinate of the layer 530 * @param right The right coordinate of the layer 531 * @param bottom The bottom coordinate of the layer 532 * @param alpha The translucency of the layer 533 * @param mode The blending mode of the layer 534 * @param flags The layer save flags 535 * @param previousFbo The name of the current framebuffer 536 * 537 * @return True if the layer was successfully created, false otherwise 538 */ 539 bool createLayer(float left, float top, float right, float bottom, 540 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 541 542 /** 543 * Creates a new layer stored in the specified snapshot as an FBO. 544 * 545 * @param layer The layer to store as an FBO 546 * @param snapshot The snapshot associated with the new layer 547 * @param bounds The bounds of the layer 548 * @param previousFbo The name of the current framebuffer 549 */ 550 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 551 552 /** 553 * Compose the specified layer as a region. 554 * 555 * @param layer The layer to compose 556 * @param rect The layer's bounds 557 */ 558 void composeLayerRegion(Layer* layer, const Rect& rect); 559 560 /** 561 * Compose the specified layer as a simple rectangle. 562 * 563 * @param layer The layer to compose 564 * @param rect The layer's bounds 565 * @param swap If true, the source and destination are swapped 566 */ 567 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 568 569 /** 570 * Clears all the regions corresponding to the current list of layers. 571 * This method MUST be invoked before any drawing operation. 572 */ 573 void clearLayerRegions(); 574 575 /** 576 * Mark the layer as dirty at the specified coordinates. The coordinates 577 * are transformed with the supplied matrix. 578 */ 579 void dirtyLayer(const float left, const float top, 580 const float right, const float bottom, const mat4 transform); 581 582 /** 583 * Mark the layer as dirty at the specified coordinates. 584 */ 585 void dirtyLayer(const float left, const float top, 586 const float right, const float bottom); 587 588 /** 589 * Draws a colored rectangle with the specified color. The specified coordinates 590 * are transformed by the current snapshot's transform matrix unless specified 591 * otherwise. 592 * 593 * @param left The left coordinate of the rectangle 594 * @param top The top coordinate of the rectangle 595 * @param right The right coordinate of the rectangle 596 * @param bottom The bottom coordinate of the rectangle 597 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 598 * @param mode The Skia xfermode to use 599 * @param ignoreTransform True if the current transform should be ignored 600 */ 601 void drawColorRect(float left, float top, float right, float bottom, 602 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 603 604 /** 605 * Draws a series of colored rectangles with the specified color. The specified 606 * coordinates are transformed by the current snapshot's transform matrix unless 607 * specified otherwise. 608 * 609 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 610 * per rectangle 611 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 612 * @param mode The Skia xfermode to use 613 * @param ignoreTransform True if the current transform should be ignored 614 * @param dirty True if calling this method should dirty the current layer 615 * @param clip True if the rects should be clipped, false otherwise 616 */ 617 status_t drawColorRects(const float* rects, int count, int color, 618 SkXfermode::Mode mode, bool ignoreTransform = false, 619 bool dirty = true, bool clip = true); 620 621 /** 622 * Draws the shape represented by the specified path texture. 623 * This method invokes drawPathTexture() but takes into account 624 * the extra left/top offset and the texture offset to correctly 625 * position the final shape. 626 * 627 * @param left The left coordinate of the shape to render 628 * @param top The top coordinate of the shape to render 629 * @param texture The texture reprsenting the shape 630 * @param paint The paint to draw the shape with 631 */ 632 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 633 634 /** 635 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 636 * different compositing rules. 637 * 638 * @param texture The texture to draw with 639 * @param left The x coordinate of the bitmap 640 * @param top The y coordinate of the bitmap 641 * @param paint The paint to render with 642 */ 643 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 644 645 /** 646 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 647 * 648 * @param vertexBuffer The VertexBuffer to be drawn 649 * @param paint The paint to render with 650 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 651 */ 652 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 653 bool useOffset = false); 654 655 /** 656 * Renders the convex hull defined by the specified path as a strip of polygons. 657 * 658 * @param path The hull of the path to draw 659 * @param paint The paint to render with 660 */ 661 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 662 663 /** 664 * Draws a textured rectangle with the specified texture. The specified coordinates 665 * are transformed by the current snapshot's transform matrix. 666 * 667 * @param left The left coordinate of the rectangle 668 * @param top The top coordinate of the rectangle 669 * @param right The right coordinate of the rectangle 670 * @param bottom The bottom coordinate of the rectangle 671 * @param texture The texture name to map onto the rectangle 672 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 673 * @param mode The blending mode 674 * @param blend True if the texture contains an alpha channel 675 */ 676 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 677 float alpha, SkXfermode::Mode mode, bool blend); 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 to use 688 * @param paint The paint containing the alpha, blending mode, etc. 689 */ 690 void drawTextureRect(float left, float top, float right, float bottom, 691 Texture* texture, SkPaint* paint); 692 693 /** 694 * Draws a textured mesh with the specified texture. If the indices are omitted, 695 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 696 * VBO is bound. 697 * 698 * @param left The left coordinate of the rectangle 699 * @param top The top coordinate of the rectangle 700 * @param right The right coordinate of the rectangle 701 * @param bottom The bottom coordinate of the rectangle 702 * @param texture The texture name to map onto the rectangle 703 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 704 * @param mode The blending mode 705 * @param blend True if the texture contains an alpha channel 706 * @param vertices The vertices that define the mesh 707 * @param texCoords The texture coordinates of each vertex 708 * @param elementsCount The number of elements in the mesh, required by indices 709 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 710 * @param ignoreTransform True if the current transform should be ignored 711 * @param vbo The VBO used to draw the mesh 712 * @param ignoreScale True if the model view matrix should not be scaled 713 * @param dirty True if calling this method should dirty the current layer 714 */ 715 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 716 float alpha, SkXfermode::Mode mode, bool blend, 717 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 718 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 719 bool ignoreScale = false, bool dirty = true); 720 721 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 722 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 723 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 724 bool ignoreTransform, bool dirty = true); 725 726 /** 727 * Draws text underline and strike-through if needed. 728 * 729 * @param text The text to decor 730 * @param bytesCount The number of bytes in the text 731 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 732 * @param x The x coordinate where the text will be drawn 733 * @param y The y coordinate where the text will be drawn 734 * @param paint The paint to draw the text with 735 */ 736 void drawTextDecorations(const char* text, int bytesCount, float length, 737 float x, float y, SkPaint* paint); 738 739 /** 740 * Draws shadow layer on text (with optional positions). 741 * 742 * @param paint The paint to draw the shadow with 743 * @param text The text to draw 744 * @param bytesCount The number of bytes in the text 745 * @param count The number of glyphs in the text 746 * @param positions The x, y positions of individual glyphs (or NULL) 747 * @param fontRenderer The font renderer object 748 * @param alpha The alpha value for drawing the shadow 749 * @param mode The xfermode for drawing the shadow 750 * @param x The x coordinate where the shadow will be drawn 751 * @param y The y coordinate where the shadow will be drawn 752 */ 753 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 754 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 755 float x, float y); 756 757 /** 758 * Draws a path texture. Path textures are alpha8 bitmaps that need special 759 * compositing to apply colors/filters/etc. 760 * 761 * @param texture The texture to render 762 * @param x The x coordinate where the texture will be drawn 763 * @param y The y coordinate where the texture will be drawn 764 * @param paint The paint to draw the texture with 765 */ 766 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 767 768 /** 769 * Resets the texture coordinates stored in mMeshVertices. Setting the values 770 * back to default is achieved by calling: 771 * 772 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 773 * 774 * @param u1 The left coordinate of the texture 775 * @param v1 The bottom coordinate of the texture 776 * @param u2 The right coordinate of the texture 777 * @param v2 The top coordinate of the texture 778 */ 779 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 780 781 /** 782 * Returns true if the specified paint will draw invisible text. 783 */ 784 bool canSkipText(const SkPaint* paint) const; 785 786 /** 787 * Binds the specified texture. The texture unit must have been selected 788 * prior to calling this method. 789 */ 790 inline void bindTexture(GLuint texture) { 791 glBindTexture(GL_TEXTURE_2D, texture); 792 } 793 794 /** 795 * Binds the specified EGLImage texture. The texture unit must have been selected 796 * prior to calling this method. 797 */ 798 inline void bindExternalTexture(GLuint texture) { 799 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 800 } 801 802 /** 803 * Enable or disable blending as necessary. This function sets the appropriate 804 * blend function based on the specified xfermode. 805 */ 806 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 807 bool swapSrcDst = false); 808 809 /** 810 * Use the specified program with the current GL context. If the program is already 811 * in use, it will not be bound again. If it is not in use, the current program is 812 * marked unused and the specified program becomes used and becomes the new 813 * current program. 814 * 815 * @param program The program to use 816 * 817 * @return true If the specified program was already in use, false otherwise. 818 */ 819 inline bool useProgram(Program* program); 820 821 /** 822 * Invoked before any drawing operation. This sets required state. 823 */ 824 void setupDraw(bool clear = true); 825 826 /** 827 * Various methods to setup OpenGL rendering. 828 */ 829 void setupDrawWithTexture(bool isAlpha8 = false); 830 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 831 void setupDrawWithExternalTexture(); 832 void setupDrawNoTexture(); 833 void setupDrawAA(); 834 void setupDrawPoint(float pointSize); 835 void setupDrawColor(int color, int alpha); 836 void setupDrawColor(float r, float g, float b, float a); 837 void setupDrawAlpha8Color(int color, int alpha); 838 void setupDrawTextGamma(const SkPaint* paint); 839 void setupDrawShader(); 840 void setupDrawColorFilter(); 841 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 842 bool swapSrcDst = false); 843 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 844 bool swapSrcDst = false); 845 void setupDrawProgram(); 846 void setupDrawDirtyRegionsDisabled(); 847 void setupDrawModelViewIdentity(bool offset = false); 848 void setupDrawModelView(float left, float top, float right, float bottom, 849 bool ignoreTransform = false, bool ignoreModelView = false); 850 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 851 bool ignoreTransform = false); 852 void setupDrawPointUniforms(); 853 void setupDrawColorUniforms(); 854 void setupDrawPureColorUniforms(); 855 void setupDrawShaderIdentityUniforms(); 856 void setupDrawShaderUniforms(bool ignoreTransform = false); 857 void setupDrawColorFilterUniforms(); 858 void setupDrawSimpleMesh(); 859 void setupDrawTexture(GLuint texture); 860 void setupDrawExternalTexture(GLuint texture); 861 void setupDrawTextureTransform(); 862 void setupDrawTextureTransformUniforms(mat4& transform); 863 void setupDrawTextGammaUniforms(); 864 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 865 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 866 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 867 void setupDrawVertices(GLvoid* vertices); 868 void finishDrawTexture(); 869 void accountForClear(SkXfermode::Mode mode); 870 871 bool updateLayer(Layer* layer, bool inFrame); 872 void updateLayers(); 873 874 /** 875 * Renders the specified region as a series of rectangles. This method 876 * is used for debugging only. 877 */ 878 void drawRegionRects(const Region& region); 879 880 /** 881 * Renders the specified region as a series of rectangles. The region 882 * must be in screen-space coordinates. 883 */ 884 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 885 bool dirty = false); 886 887 /** 888 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 889 * is turned on. 890 */ 891 void debugClip(); 892 893 void debugOverdraw(bool enable, bool clear); 894 void renderOverdraw(); 895 896 /** 897 * Should be invoked every time the glScissor is modified. 898 */ 899 inline void dirtyClip() { 900 mDirtyClip = true; 901 } 902 903 // Dimensions of the drawing surface 904 int mWidth, mHeight; 905 906 // Matrix used for ortho projection in shaders 907 mat4 mOrthoMatrix; 908 909 // Model-view matrix used to position/size objects 910 mat4 mModelView; 911 912 // Number of saved states 913 int mSaveCount; 914 // Base state 915 sp<Snapshot> mFirstSnapshot; 916 // Current state 917 sp<Snapshot> mSnapshot; 918 // State used to define the clipping region 919 sp<Snapshot> mTilingSnapshot; 920 921 // Used to draw textured quads 922 TextureVertex mMeshVertices[4]; 923 924 // shader, filters, and shadow 925 DrawModifiers mDrawModifiers; 926 SkPaint mFilteredPaint; 927 928 // Various caches 929 Caches& mCaches; 930 Extensions& mExtensions; 931 932 // List of rectangles to clear after saveLayer() is invoked 933 Vector<Rect*> mLayers; 934 // List of functors to invoke after a frame is drawn 935 SortedVector<Functor*> mFunctors; 936 // List of layers to update at the beginning of a frame 937 Vector<Layer*> mLayerUpdates; 938 939 // Indentity matrix 940 const mat4 mIdentity; 941 942 // Indicates whether the clip must be restored 943 bool mDirtyClip; 944 945 // The following fields are used to setup drawing 946 // Used to describe the shaders to generate 947 ProgramDescription mDescription; 948 // Color description 949 bool mColorSet; 950 float mColorA, mColorR, mColorG, mColorB; 951 // Indicates that the shader should get a color 952 bool mSetShaderColor; 953 // Current texture unit 954 GLuint mTextureUnit; 955 // Track dirty regions, true by default 956 bool mTrackDirtyRegions; 957 // Indicate whether we are drawing an opaque frame 958 bool mOpaqueFrame; 959 960 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 961 // Properties.h 962 bool mScissorOptimizationDisabled; 963 bool mDrawDeferDisabled; 964 bool mDrawReorderDisabled; 965 966 // No-ops start/endTiling when set 967 bool mSuppressTiling; 968 969 // Optional name of the renderer 970 String8 mName; 971 972 friend class DisplayListRenderer; 973 974}; // class OpenGLRenderer 975 976}; // namespace uirenderer 977}; // namespace android 978 979#endif // ANDROID_HWUI_OPENGL_RENDERER_H 980