OpenGLRenderer.h revision 4f02bf4eef6af47f35c70c4dda5b7b9523d89ca0
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 <androidfw/ResourceTypes.h> 38 39#include "Debug.h" 40#include "Extensions.h" 41#include "Matrix.h" 42#include "Program.h" 43#include "Rect.h" 44#include "Renderer.h" 45#include "StatefulBaseRenderer.h" 46#include "SkiaColorFilter.h" 47#include "Snapshot.h" 48#include "UvMapper.h" 49#include "Vertex.h" 50#include "Caches.h" 51 52namespace android { 53namespace uirenderer { 54 55class DeferredDisplayState; 56class DisplayList; 57class TextSetupFunctor; 58class VertexBuffer; 59class SkiaShader; 60 61struct DrawModifiers { 62 DrawModifiers() { 63 reset(); 64 } 65 66 void reset() { 67 memset(this, 0, sizeof(DrawModifiers)); 68 } 69 70 SkiaShader* mShader; 71 SkiaColorFilter* mColorFilter; 72 float mOverrideLayerAlpha; 73 74 // Drop shadow 75 bool mHasShadow; 76 float mShadowRadius; 77 float mShadowDx; 78 float mShadowDy; 79 int mShadowColor; 80 81 // Draw filters 82 bool mHasDrawFilter; 83 int mPaintFilterClearBits; 84 int mPaintFilterSetBits; 85}; 86 87enum StateDeferFlags { 88 kStateDeferFlag_Draw = 0x1, 89 kStateDeferFlag_Clip = 0x2 90}; 91 92enum ClipSideFlags { 93 kClipSide_None = 0x0, 94 kClipSide_Left = 0x1, 95 kClipSide_Top = 0x2, 96 kClipSide_Right = 0x4, 97 kClipSide_Bottom = 0x8, 98 kClipSide_Full = 0xF, 99 kClipSide_ConservativeFull = 0x1F 100}; 101 102/** 103 * Defines additional transformation that should be applied by the model view matrix, beyond that of 104 * the currentTransform() 105 */ 106enum ModelViewMode { 107 /** 108 * Used when the model view should simply translate geometry passed to the shader. The resulting 109 * matrix will be a simple translation. 110 */ 111 kModelViewMode_Translate = 0, 112 113 /** 114 * Used when the model view should translate and scale geometry. The resulting matrix will be a 115 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 116 */ 117 kModelViewMode_TranslateAndScale = 1, 118}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public StatefulBaseRenderer { 127public: 128 ANDROID_API OpenGLRenderer(); 129 virtual ~OpenGLRenderer(); 130 131 ANDROID_API void initProperties(); 132 133 virtual void setViewport(int width, int height); 134 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 135 virtual void finish(); 136 virtual void interrupt(); 137 virtual void resume(); 138 139 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 140 mCountOverdraw = enabled; 141 } 142 143 ANDROID_API float getOverdraw() { 144 return mCountOverdraw ? mOverdraw : 0.0f; 145 } 146 147 ANDROID_API status_t invokeFunctors(Rect& dirty); 148 ANDROID_API void detachFunctor(Functor* functor); 149 ANDROID_API void attachFunctor(Functor* functor); 150 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 151 152 ANDROID_API void pushLayerUpdate(Layer* layer); 153 ANDROID_API void cancelLayerUpdate(Layer* layer); 154 ANDROID_API void clearLayerUpdates(); 155 ANDROID_API void flushLayerUpdates(); 156 157 ANDROID_API int saveLayer(float left, float top, float right, float bottom, 158 SkPaint* paint, int flags) { 159 SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode; 160 if (paint) mode = getXfermode(paint->getXfermode()); 161 return saveLayer(left, top, right, bottom, paint ? paint->getAlpha() : 255, mode, flags); 162 } 163 ANDROID_API int saveLayerAlpha(float left, float top, float right, float bottom, 164 int alpha, int flags) { 165 return saveLayer(left, top, right, bottom, alpha, SkXfermode::kSrcOver_Mode, flags); 166 } 167 virtual int saveLayer(float left, float top, float right, float bottom, 168 int alpha, SkXfermode::Mode mode, int flags); 169 170 int saveLayerDeferred(float left, float top, float right, float bottom, 171 int alpha, SkXfermode::Mode mode, int flags); 172 173 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags = 1); 174 virtual status_t drawLayer(Layer* layer, float x, float y); 175 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 176 const SkPaint* paint); 177 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 178 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 179 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 180 const SkPaint* paint); 181 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 182 float srcRight, float srcBottom, float dstLeft, float dstTop, 183 float dstRight, float dstBottom, const SkPaint* paint); 184 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 185 const SkPaint* paint); 186 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 187 const float* vertices, const int* colors, const SkPaint* paint); 188 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 189 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 190 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 191 float left, float top, float right, float bottom, const SkPaint* paint); 192 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 193 float left, float top, float right, float bottom, const SkPaint* paint); 194 virtual status_t drawColor(int color, SkXfermode::Mode mode); 195 virtual status_t drawRect(float left, float top, float right, float bottom, 196 const SkPaint* paint); 197 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 198 float rx, float ry, const SkPaint* paint); 199 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 200 virtual status_t drawOval(float left, float top, float right, float bottom, 201 const SkPaint* paint); 202 virtual status_t drawArc(float left, float top, float right, float bottom, 203 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 204 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 205 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 206 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 207 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 208 float hOffset, float vOffset, const SkPaint* paint); 209 virtual status_t drawPosText(const char* text, int bytesCount, int count, 210 const float* positions, const SkPaint* paint); 211 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 212 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 213 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 214 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 215 216 status_t drawShadow(const mat4& casterTransform, float casterAlpha, 217 float width, float height); 218 219 virtual void resetShader(); 220 virtual void setupShader(SkiaShader* shader); 221 222 virtual void resetColorFilter(); 223 virtual void setupColorFilter(SkiaColorFilter* filter); 224 225 virtual void resetShadow(); 226 virtual void setupShadow(float radius, float dx, float dy, int color); 227 228 virtual void resetPaintFilter(); 229 virtual void setupPaintFilter(int clearBits, int setBits); 230 231 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 232 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 233 234 const SkPaint* filterPaint(const SkPaint* paint); 235 236 /** 237 * Store the current display state (most importantly, the current clip and transform), and 238 * additionally map the state's bounds from local to window coordinates. 239 * 240 * Returns true if quick-rejected 241 */ 242 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 243 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 244 void setupMergedMultiDraw(const Rect* clipRect); 245 246 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 247 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 248 249 ANDROID_API bool isCurrentTransformSimple() { 250 return currentTransform()->isSimple(); 251 } 252 253 Caches& getCaches() { 254 return mCaches; 255 } 256 257 // simple rect clip 258 bool isCurrentClipSimple() { 259 return mSnapshot->clipRegion->isEmpty(); 260 } 261 262 int getViewportWidth() { return currentSnapshot()->viewport.getWidth(); } 263 int getViewportHeight() { return currentSnapshot()->viewport.getHeight(); } 264 265 /** 266 * Scales the alpha on the current snapshot. This alpha value will be modulated 267 * with other alpha values when drawing primitives. 268 */ 269 void scaleAlpha(float alpha) { 270 mSnapshot->alpha *= alpha; 271 } 272 273 /** 274 * Inserts a named event marker in the stream of GL commands. 275 */ 276 void eventMark(const char* name) const; 277 278 /** 279 * Inserts a named group marker in the stream of GL commands. This marker 280 * can be used by tools to group commands into logical groups. A call to 281 * this method must always be followed later on by a call to endMark(). 282 */ 283 void startMark(const char* name) const; 284 285 /** 286 * Closes the last group marker opened by startMark(). 287 */ 288 void endMark() const; 289 290 /** 291 * Gets the alpha and xfermode out of a paint object. If the paint is null 292 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 293 * not multiply the paint's alpha by the current snapshot's alpha, and does 294 * not replace the alpha with the overrideLayerAlpha 295 * 296 * @param paint The paint to extract values from 297 * @param alpha Where to store the resulting alpha 298 * @param mode Where to store the resulting xfermode 299 */ 300 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 301 *mode = getXfermodeDirect(paint); 302 *alpha = getAlphaDirect(paint); 303 } 304 305 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 306 if (!paint) return SkXfermode::kSrcOver_Mode; 307 return getXfermode(paint->getXfermode()); 308 } 309 310 static inline int getAlphaDirect(const SkPaint* paint) { 311 if (!paint) return 255; 312 return paint->getAlpha(); 313 } 314 315 /** 316 * Return the best transform to use to rasterize text given a full 317 * transform matrix. 318 */ 319 mat4 findBestFontTransform(const mat4& transform) const; 320 321#if DEBUG_MERGE_BEHAVIOR 322 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 323 mCaches.setScissorEnabled(false); 324 325 // should only be called outside of other draw ops, so stencil can only be in test state 326 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 327 mCaches.stencil.disable(); 328 329 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 330 331 if (stencilWasEnabled) mCaches.stencil.enableTest(); 332 } 333#endif 334 335protected: 336 /** 337 * Computes the projection matrix, initialize the first snapshot 338 * and stores the dimensions of the render target. 339 */ 340 void initViewport(int width, int height); 341 342 /** 343 * Perform the setup specific to a frame. This method does not 344 * issue any OpenGL commands. 345 */ 346 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 347 348 /** 349 * Indicates the start of rendering. This method will setup the 350 * initial OpenGL state (viewport, clearing the buffer, etc.) 351 */ 352 status_t startFrame(); 353 354 /** 355 * Clears the underlying surface if needed. 356 */ 357 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 358 359 /** 360 * Call this method after updating a layer during a drawing pass. 361 */ 362 void resumeAfterLayer(); 363 364 /** 365 * This method is called whenever a stencil buffer is required. Subclasses 366 * should override this method and call attachStencilBufferToLayer() on the 367 * appropriate layer(s). 368 */ 369 virtual void ensureStencilBuffer(); 370 371 /** 372 * Obtains a stencil render buffer (allocating it if necessary) and 373 * attaches it to the specified layer. 374 */ 375 void attachStencilBufferToLayer(Layer* layer); 376 377 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 378 const SkPaint* paint = NULL); 379 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 380 return quickRejectSetupScissor(bounds.left, bounds.top, 381 bounds.right, bounds.bottom, paint); 382 } 383 384 /** 385 * Compose the layer defined in the current snapshot with the layer 386 * defined by the previous snapshot. 387 * 388 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 389 * 390 * @param curent The current snapshot containing the layer to compose 391 * @param previous The previous snapshot to compose the current layer with 392 */ 393 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 394 395 /** 396 * Marks the specified region as dirty at the specified bounds. 397 */ 398 void dirtyLayerUnchecked(Rect& bounds, Region* region); 399 400 /** 401 * Returns the region of the current layer. 402 */ 403 virtual Region* getRegion() const { 404 return mSnapshot->region; 405 } 406 407 /** 408 * Indicates whether rendering is currently targeted at a layer. 409 */ 410 virtual bool hasLayer() const { 411 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 412 } 413 414 /** 415 * Returns the name of the FBO this renderer is rendering into. 416 */ 417 virtual GLuint getTargetFbo() const { 418 return 0; 419 } 420 421 /** 422 * Renders the specified layer as a textured quad. 423 * 424 * @param layer The layer to render 425 * @param rect The bounds of the layer 426 */ 427 void drawTextureLayer(Layer* layer, const Rect& rect); 428 429 /** 430 * Gets the alpha and xfermode out of a paint object. If the paint is null 431 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 432 * snapshot alpha, and overrideLayerAlpha 433 * 434 * @param paint The paint to extract values from 435 * @param alpha Where to store the resulting alpha 436 * @param mode Where to store the resulting xfermode 437 */ 438 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 439 440 /** 441 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 442 * 443 * @param layer The layer from which the alpha is extracted 444 */ 445 inline float getLayerAlpha(Layer* layer) const; 446 447 /** 448 * Safely retrieves the mode from the specified xfermode. If the specified 449 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 450 */ 451 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 452 SkXfermode::Mode resultMode; 453 if (!SkXfermode::AsMode(mode, &resultMode)) { 454 resultMode = SkXfermode::kSrcOver_Mode; 455 } 456 return resultMode; 457 } 458 459 /** 460 * Set to true to suppress error checks at the end of a frame. 461 */ 462 virtual bool suppressErrorChecks() const { 463 return false; 464 } 465 466private: 467 /** 468 * Discards the content of the framebuffer if supported by the driver. 469 * This method should be called at the beginning of a frame to optimize 470 * rendering on some tiler architectures. 471 */ 472 void discardFramebuffer(float left, float top, float right, float bottom); 473 474 /** 475 * Ensures the state of the renderer is the same as the state of 476 * the GL context. 477 */ 478 void syncState(); 479 480 /** 481 * Tells the GPU what part of the screen is about to be redrawn. 482 * This method will use the current layer space clip rect. 483 * This method needs to be invoked every time getTargetFbo() is 484 * bound again. 485 */ 486 void startTilingCurrentClip(bool opaque = false); 487 488 /** 489 * Tells the GPU what part of the screen is about to be redrawn. 490 * This method needs to be invoked every time getTargetFbo() is 491 * bound again. 492 */ 493 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 494 495 /** 496 * Tells the GPU that we are done drawing the frame or that we 497 * are switching to another render target. 498 */ 499 void endTiling(); 500 501 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 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 * Given the local bounds of the layer, calculates ... 517 */ 518 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 519 520 /** 521 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 522 */ 523 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 524 bool fboLayer, int alpha); 525 526 /** 527 * Creates a new layer stored in the specified snapshot. 528 * 529 * @param snapshot The snapshot associated with the new layer 530 * @param left The left coordinate of the layer 531 * @param top The top coordinate of the layer 532 * @param right The right coordinate of the layer 533 * @param bottom The bottom coordinate of the layer 534 * @param alpha The translucency of the layer 535 * @param mode The blending mode of the layer 536 * @param flags The layer save flags 537 * 538 * @return True if the layer was successfully created, false otherwise 539 */ 540 bool createLayer(float left, float top, float right, float bottom, 541 int alpha, SkXfermode::Mode mode, int flags); 542 543 /** 544 * Creates a new layer stored in the specified snapshot as an FBO. 545 * 546 * @param layer The layer to store as an FBO 547 * @param snapshot The snapshot associated with the new layer 548 * @param bounds The bounds of the layer 549 */ 550 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 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, const 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, const 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, const 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, const 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, const 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 modelViewMode Defines whether the model view matrix should 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 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 720 721 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 722 float alpha, SkXfermode::Mode mode, bool blend, 723 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 724 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 725 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 726 727 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 728 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 729 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 730 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 731 bool dirty = true); 732 733 /** 734 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 735 * If the number of vertices to draw exceeds the number of indices we have 736 * pre-allocated, this method will generate several glDrawElements() calls. 737 */ 738 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 739 740 /** 741 * Draws text underline and strike-through if needed. 742 * 743 * @param text The text to decor 744 * @param bytesCount The number of bytes in the text 745 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 746 * @param x The x coordinate where the text will be drawn 747 * @param y The y coordinate where the text will be drawn 748 * @param paint The paint to draw the text with 749 */ 750 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 751 752 /** 753 * Draws shadow layer on text (with optional positions). 754 * 755 * @param paint The paint to draw the shadow with 756 * @param text The text to draw 757 * @param bytesCount The number of bytes in the text 758 * @param count The number of glyphs in the text 759 * @param positions The x, y positions of individual glyphs (or NULL) 760 * @param fontRenderer The font renderer object 761 * @param alpha The alpha value for drawing the shadow 762 * @param mode The xfermode for drawing the shadow 763 * @param x The x coordinate where the shadow will be drawn 764 * @param y The y coordinate where the shadow will be drawn 765 */ 766 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 767 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 768 float x, float y); 769 770 /** 771 * Draws a path texture. Path textures are alpha8 bitmaps that need special 772 * compositing to apply colors/filters/etc. 773 * 774 * @param texture The texture to render 775 * @param x The x coordinate where the texture will be drawn 776 * @param y The y coordinate where the texture will be drawn 777 * @param paint The paint to draw the texture with 778 */ 779 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 780 781 /** 782 * Resets the texture coordinates stored in mMeshVertices. Setting the values 783 * back to default is achieved by calling: 784 * 785 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 786 * 787 * @param u1 The left coordinate of the texture 788 * @param v1 The bottom coordinate of the texture 789 * @param u2 The right coordinate of the texture 790 * @param v2 The top coordinate of the texture 791 */ 792 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 793 794 /** 795 * Returns true if the specified paint will draw invisible text. 796 */ 797 bool canSkipText(const SkPaint* paint) const; 798 799 /** 800 * Binds the specified texture. The texture unit must have been selected 801 * prior to calling this method. 802 */ 803 inline void bindTexture(GLuint texture) { 804 mCaches.bindTexture(texture); 805 } 806 807 /** 808 * Binds the specified EGLImage texture. The texture unit must have been selected 809 * prior to calling this method. 810 */ 811 inline void bindExternalTexture(GLuint texture) { 812 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 813 } 814 815 /** 816 * Enable or disable blending as necessary. This function sets the appropriate 817 * blend function based on the specified xfermode. 818 */ 819 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 820 bool swapSrcDst = false); 821 822 /** 823 * Use the specified program with the current GL context. If the program is already 824 * in use, it will not be bound again. If it is not in use, the current program is 825 * marked unused and the specified program becomes used and becomes the new 826 * current program. 827 * 828 * @param program The program to use 829 * 830 * @return true If the specified program was already in use, false otherwise. 831 */ 832 inline bool useProgram(Program* program); 833 834 /** 835 * Invoked before any drawing operation. This sets required state. 836 */ 837 void setupDraw(bool clear = true); 838 839 /** 840 * Various methods to setup OpenGL rendering. 841 */ 842 void setupDrawWithTexture(bool isAlpha8 = false); 843 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 844 void setupDrawWithExternalTexture(); 845 void setupDrawNoTexture(); 846 void setupDrawAA(); 847 void setupDrawColor(int color, int alpha); 848 void setupDrawColor(float r, float g, float b, float a); 849 void setupDrawAlpha8Color(int color, int alpha); 850 void setupDrawTextGamma(const SkPaint* paint); 851 void setupDrawShader(); 852 void setupDrawColorFilter(); 853 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 854 bool swapSrcDst = false); 855 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 856 bool swapSrcDst = false); 857 void setupDrawProgram(); 858 void setupDrawDirtyRegionsDisabled(); 859 860 /** 861 * Setup the current program matrices based upon the nature of the geometry. 862 * 863 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 864 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 865 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 866 * transformations are stored in the modelView matrix and uploaded to the shader. 867 * 868 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 869 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 870 * 871 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 872 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 873 * or when simple translation has been extracted) 874 */ 875 void setupDrawModelView(ModelViewMode mode, bool offset, 876 float left, float top, float right, float bottom, bool ignoreTransform = false); 877 void setupDrawColorUniforms(); 878 void setupDrawPureColorUniforms(); 879 void setupDrawShaderUniforms(bool ignoreTransform = false); 880 void setupDrawColorFilterUniforms(); 881 void setupDrawSimpleMesh(); 882 void setupDrawTexture(GLuint texture); 883 void setupDrawExternalTexture(GLuint texture); 884 void setupDrawTextureTransform(); 885 void setupDrawTextureTransformUniforms(mat4& transform); 886 void setupDrawTextGammaUniforms(); 887 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 888 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 889 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 890 void setupDrawIndexedVertices(GLvoid* vertices); 891 void accountForClear(SkXfermode::Mode mode); 892 893 bool updateLayer(Layer* layer, bool inFrame); 894 void updateLayers(); 895 void flushLayers(); 896 897#if DEBUG_LAYERS_AS_REGIONS 898 /** 899 * Renders the specified region as a series of rectangles. This method 900 * is used for debugging only. 901 */ 902 void drawRegionRectsDebug(const Region& region); 903#endif 904 905 /** 906 * Renders the specified region as a series of rectangles. The region 907 * must be in screen-space coordinates. 908 */ 909 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 910 bool dirty = false); 911 912 /** 913 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 914 * is turned on. 915 */ 916 void debugClip(); 917 918 void debugOverdraw(bool enable, bool clear); 919 void renderOverdraw(); 920 void countOverdraw(); 921 922 /** 923 * Should be invoked every time the glScissor is modified. 924 */ 925 inline void dirtyClip() { 926 mDirtyClip = true; 927 } 928 929 inline const UvMapper& getMapper(const Texture* texture) { 930 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 931 } 932 933 /** 934 * Returns a texture object for the specified bitmap. The texture can 935 * come from the texture cache or an atlas. If this method returns 936 * NULL, the texture could not be found and/or allocated. 937 */ 938 Texture* getTexture(const SkBitmap* bitmap); 939 940 // Matrix used for view/projection in shaders 941 mat4 mViewProjMatrix; 942 943 /** 944 * Model-view matrix used to position/size objects 945 * 946 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 947 * currentTransform(). 948 * 949 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 950 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 951 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 952 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 953 * bitmap. 954 * 955 * Used as input to SkiaShader transformation. 956 */ 957 mat4 mModelView; 958 959 // State used to define the clipping region 960 Rect mTilingClip; 961 // Is the target render surface opaque 962 bool mOpaque; 963 // Is a frame currently being rendered 964 bool mFrameStarted; 965 966 // Used to draw textured quads 967 TextureVertex mMeshVertices[4]; 968 969 // Default UV mapper 970 const UvMapper mUvMapper; 971 972 // shader, filters, and shadow 973 DrawModifiers mDrawModifiers; 974 SkPaint mFilteredPaint; 975 976 // Various caches 977 Caches& mCaches; 978 Extensions& mExtensions; 979 980 // List of rectangles to clear after saveLayer() is invoked 981 Vector<Rect*> mLayers; 982 // List of functors to invoke after a frame is drawn 983 SortedVector<Functor*> mFunctors; 984 // List of layers to update at the beginning of a frame 985 Vector<Layer*> mLayerUpdates; 986 987 // The following fields are used to setup drawing 988 // Used to describe the shaders to generate 989 ProgramDescription mDescription; 990 // Color description 991 bool mColorSet; 992 float mColorA, mColorR, mColorG, mColorB; 993 // Indicates that the shader should get a color 994 bool mSetShaderColor; 995 // Current texture unit 996 GLuint mTextureUnit; 997 // Track dirty regions, true by default 998 bool mTrackDirtyRegions; 999 // Indicate whether we are drawing an opaque frame 1000 bool mOpaqueFrame; 1001 1002 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 1003 // Properties.h 1004 bool mScissorOptimizationDisabled; 1005 1006 // No-ops start/endTiling when set 1007 bool mSuppressTiling; 1008 1009 // If true, this renderer will setup drawing to emulate 1010 // an increment stencil buffer in the color buffer 1011 bool mCountOverdraw; 1012 float mOverdraw; 1013 1014 friend class DisplayListRenderer; 1015 friend class Layer; 1016 friend class TextSetupFunctor; 1017 friend class DrawBitmapOp; 1018 friend class DrawPatchOp; 1019 1020}; // class OpenGLRenderer 1021 1022}; // namespace uirenderer 1023}; // namespace android 1024 1025#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1026