OpenGLRenderer.h revision ca1b3b83bb4289315e25520364182ebad951ba08
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 <SkCanvas.h> 25#include <SkColorFilter.h> 26#include <SkMatrix.h> 27#include <SkPaint.h> 28#include <SkRegion.h> 29#include <SkXfermode.h> 30 31#include <utils/Blur.h> 32#include <utils/Functor.h> 33#include <utils/RefBase.h> 34#include <utils/SortedVector.h> 35#include <utils/Vector.h> 36 37#include <cutils/compiler.h> 38 39#include <androidfw/ResourceTypes.h> 40 41#include "Debug.h" 42#include "Extensions.h" 43#include "Matrix.h" 44#include "Program.h" 45#include "Rect.h" 46#include "Renderer.h" 47#include "Snapshot.h" 48#include "StatefulBaseRenderer.h" 49#include "UvMapper.h" 50#include "Vertex.h" 51#include "Caches.h" 52#include "CanvasProperty.h" 53 54class SkShader; 55 56namespace android { 57namespace uirenderer { 58 59class DeferredDisplayState; 60class RenderState; 61class RenderNode; 62class TextSetupFunctor; 63class VertexBuffer; 64 65struct DrawModifiers { 66 DrawModifiers() { 67 reset(); 68 } 69 70 void reset() { 71 memset(this, 0, sizeof(DrawModifiers)); 72 } 73 74 float mOverrideLayerAlpha; 75 76 // Draw filters 77 bool mHasDrawFilter; 78 int mPaintFilterClearBits; 79 int mPaintFilterSetBits; 80}; 81 82enum StateDeferFlags { 83 kStateDeferFlag_Draw = 0x1, 84 kStateDeferFlag_Clip = 0x2 85}; 86 87enum ClipSideFlags { 88 kClipSide_None = 0x0, 89 kClipSide_Left = 0x1, 90 kClipSide_Top = 0x2, 91 kClipSide_Right = 0x4, 92 kClipSide_Bottom = 0x8, 93 kClipSide_Full = 0xF, 94 kClipSide_ConservativeFull = 0x1F 95}; 96 97/** 98 * Defines additional transformation that should be applied by the model view matrix, beyond that of 99 * the currentTransform() 100 */ 101enum ModelViewMode { 102 /** 103 * Used when the model view should simply translate geometry passed to the shader. The resulting 104 * matrix will be a simple translation. 105 */ 106 kModelViewMode_Translate = 0, 107 108 /** 109 * Used when the model view should translate and scale geometry. The resulting matrix will be a 110 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 111 */ 112 kModelViewMode_TranslateAndScale = 1, 113}; 114 115/////////////////////////////////////////////////////////////////////////////// 116// Renderer 117/////////////////////////////////////////////////////////////////////////////// 118/** 119 * OpenGL Renderer implementation. 120 */ 121class OpenGLRenderer : public StatefulBaseRenderer { 122public: 123 OpenGLRenderer(RenderState& renderState); 124 virtual ~OpenGLRenderer(); 125 126 void initProperties(); 127 128 virtual void onViewportInitialized(); 129 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 130 virtual void finish(); 131 132 void setCountOverdrawEnabled(bool enabled) { 133 mCountOverdraw = enabled; 134 } 135 136 float getOverdraw() { 137 return mCountOverdraw ? mOverdraw : 0.0f; 138 } 139 140 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 141 142 void pushLayerUpdate(Layer* layer); 143 void cancelLayerUpdate(Layer* layer); 144 void clearLayerUpdates(); 145 void flushLayerUpdates(); 146 147 virtual int saveLayer(float left, float top, float right, float bottom, 148 const SkPaint* paint, int flags) { 149 return saveLayer(left, top, right, bottom, paint, flags, NULL); 150 } 151 152 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 153 // created, which will in turn clip to that mask when drawn back/restored. 154 int saveLayer(float left, float top, float right, float bottom, 155 const SkPaint* paint, int flags, const SkPath* convexMask); 156 157 int saveLayerDeferred(float left, float top, float right, float bottom, 158 const SkPaint* paint, int flags); 159 160 virtual status_t drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 161 virtual status_t drawLayer(Layer* layer, float x, float y); 162 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 163 const SkPaint* paint); 164 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 165 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 166 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix& matrix, 167 const SkPaint* paint); 168 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 169 float srcRight, float srcBottom, float dstLeft, float dstTop, 170 float dstRight, float dstBottom, const SkPaint* paint); 171 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 172 const SkPaint* paint); 173 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 174 const float* vertices, const int* colors, const SkPaint* paint); 175 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 176 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 177 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 178 float left, float top, float right, float bottom, const SkPaint* paint); 179 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 180 float left, float top, float right, float bottom, const SkPaint* paint); 181 virtual status_t drawColor(int color, SkXfermode::Mode mode); 182 virtual status_t drawRect(float left, float top, float right, float bottom, 183 const SkPaint* paint); 184 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 185 float rx, float ry, const SkPaint* paint); 186 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 187 virtual status_t drawOval(float left, float top, float right, float bottom, 188 const SkPaint* paint); 189 virtual status_t drawArc(float left, float top, float right, float bottom, 190 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 191 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 192 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 193 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 194 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 195 float hOffset, float vOffset, const SkPaint* paint); 196 virtual status_t drawPosText(const char* text, int bytesCount, int count, 197 const float* positions, const SkPaint* paint); 198 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 199 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 200 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 201 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 202 203 status_t drawShadow(float casterAlpha, 204 const VertexBuffer* ambientShadowVertexBuffer, const VertexBuffer* spotShadowVertexBuffer); 205 206 virtual void resetPaintFilter(); 207 virtual void setupPaintFilter(int clearBits, int setBits); 208 209 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 210 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 211 212 const SkPaint* filterPaint(const SkPaint* paint); 213 214 /** 215 * Store the current display state (most importantly, the current clip and transform), and 216 * additionally map the state's bounds from local to window coordinates. 217 * 218 * Returns true if quick-rejected 219 */ 220 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 221 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 222 void setupMergedMultiDraw(const Rect* clipRect); 223 224 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 225 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 226 227 bool isCurrentTransformSimple() { 228 return currentTransform()->isSimple(); 229 } 230 231 Caches& getCaches() { 232 return mCaches; 233 } 234 235 // simple rect clip 236 bool isCurrentClipSimple() { 237 return mSnapshot->clipRegion->isEmpty(); 238 } 239 240 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 241 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 242 243 /** 244 * Scales the alpha on the current snapshot. This alpha value will be modulated 245 * with other alpha values when drawing primitives. 246 */ 247 void scaleAlpha(float alpha) { 248 mSnapshot->alpha *= alpha; 249 } 250 251 /** 252 * Inserts a named event marker in the stream of GL commands. 253 */ 254 void eventMark(const char* name) const; 255 256 /** 257 * Inserts a named group marker in the stream of GL commands. This marker 258 * can be used by tools to group commands into logical groups. A call to 259 * this method must always be followed later on by a call to endMark(). 260 */ 261 void startMark(const char* name) const; 262 263 /** 264 * Closes the last group marker opened by startMark(). 265 */ 266 void endMark() const; 267 268 /** 269 * Gets the alpha and xfermode out of a paint object. If the paint is null 270 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 271 * not multiply the paint's alpha by the current snapshot's alpha, and does 272 * not replace the alpha with the overrideLayerAlpha 273 * 274 * @param paint The paint to extract values from 275 * @param alpha Where to store the resulting alpha 276 * @param mode Where to store the resulting xfermode 277 */ 278 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 279 *mode = getXfermodeDirect(paint); 280 *alpha = getAlphaDirect(paint); 281 } 282 283 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 284 if (!paint) return SkXfermode::kSrcOver_Mode; 285 return getXfermode(paint->getXfermode()); 286 } 287 288 static inline int getAlphaDirect(const SkPaint* paint) { 289 if (!paint) return 255; 290 return paint->getAlpha(); 291 } 292 293 struct TextShadow { 294 SkScalar radius; 295 float dx; 296 float dy; 297 SkColor color; 298 }; 299 300 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 301 SkDrawLooper::BlurShadowRec blur; 302 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 303 if (textShadow) { 304 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 305 textShadow->dx = blur.fOffset.fX; 306 textShadow->dy = blur.fOffset.fY; 307 textShadow->color = blur.fColor; 308 } 309 return true; 310 } 311 return false; 312 } 313 314 static inline bool hasTextShadow(const SkPaint* paint) { 315 return getTextShadow(paint, NULL); 316 } 317 318 /** 319 * Return the best transform to use to rasterize text given a full 320 * transform matrix. 321 */ 322 mat4 findBestFontTransform(const mat4& transform) const; 323 324#if DEBUG_MERGE_BEHAVIOR 325 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 326 mCaches.setScissorEnabled(false); 327 328 // should only be called outside of other draw ops, so stencil can only be in test state 329 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 330 mCaches.stencil.disable(); 331 332 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 333 334 if (stencilWasEnabled) mCaches.stencil.enableTest(); 335 } 336#endif 337 338 const Vector3& getLightCenter() const { return mLightCenter; } 339 float getLightRadius() const { return mLightRadius; } 340 341protected: 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(const Layer* layer) const; 446 447 /** 448 * Safely retrieves the ColorFilter from the given Paint. If the paint is 449 * null then null is returned. 450 */ 451 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 452 return paint ? paint->getColorFilter() : NULL; 453 } 454 455 /** 456 * Safely retrieves the Shader from the given Paint. If the paint is 457 * null then null is returned. 458 */ 459 static inline const SkShader* getShader(const SkPaint* paint) { 460 return paint ? paint->getShader() : NULL; 461 } 462 463 /** 464 * Set to true to suppress error checks at the end of a frame. 465 */ 466 virtual bool suppressErrorChecks() const { 467 return false; 468 } 469 470 inline RenderState& renderState() { return mRenderState; } 471 472private: 473 /** 474 * Discards the content of the framebuffer if supported by the driver. 475 * This method should be called at the beginning of a frame to optimize 476 * rendering on some tiler architectures. 477 */ 478 void discardFramebuffer(float left, float top, float right, float bottom); 479 480 /** 481 * Ensures the state of the renderer is the same as the state of 482 * the GL context. 483 */ 484 void syncState(); 485 486 /** 487 * Tells the GPU what part of the screen is about to be redrawn. 488 * This method will use the current layer space clip rect. 489 * This method needs to be invoked every time getTargetFbo() is 490 * bound again. 491 */ 492 void startTilingCurrentClip(bool opaque = false); 493 494 /** 495 * Tells the GPU what part of the screen is about to be redrawn. 496 * This method needs to be invoked every time getTargetFbo() is 497 * bound again. 498 */ 499 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 500 501 /** 502 * Tells the GPU that we are done drawing the frame or that we 503 * are switching to another render target. 504 */ 505 void endTiling(); 506 507 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 508 509 /** 510 * Sets the clipping rectangle using glScissor. The clip is defined by 511 * the current snapshot's clipRect member. 512 */ 513 void setScissorFromClip(); 514 515 /** 516 * Sets the clipping region using the stencil buffer. The clip region 517 * is defined by the current snapshot's clipRegion member. 518 */ 519 void setStencilFromClip(); 520 521 /** 522 * Given the local bounds of the layer, calculates ... 523 */ 524 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 525 526 /** 527 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 528 */ 529 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 530 bool fboLayer, int alpha); 531 532 /** 533 * Creates a new layer stored in the specified snapshot. 534 * 535 * @param snapshot The snapshot associated with the new layer 536 * @param left The left coordinate of the layer 537 * @param top The top coordinate of the layer 538 * @param right The right coordinate of the layer 539 * @param bottom The bottom coordinate of the layer 540 * @param alpha The translucency of the layer 541 * @param mode The blending mode of the layer 542 * @param flags The layer save flags 543 * @param mask A mask to use when drawing the layer back, may be empty 544 * 545 * @return True if the layer was successfully created, false otherwise 546 */ 547 bool createLayer(float left, float top, float right, float bottom, 548 const SkPaint* paint, int flags, const SkPath* convexMask); 549 550 /** 551 * Creates a new layer stored in the specified snapshot as an FBO. 552 * 553 * @param layer The layer to store as an FBO 554 * @param snapshot The snapshot associated with the new layer 555 * @param bounds The bounds of the layer 556 */ 557 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 558 559 /** 560 * Compose the specified layer as a region. 561 * 562 * @param layer The layer to compose 563 * @param rect The layer's bounds 564 */ 565 void composeLayerRegion(Layer* layer, const Rect& rect); 566 567 /** 568 * Compose the specified layer as a simple rectangle. 569 * 570 * @param layer The layer to compose 571 * @param rect The layer's bounds 572 * @param swap If true, the source and destination are swapped 573 */ 574 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 575 576 /** 577 * Clears all the regions corresponding to the current list of layers. 578 * This method MUST be invoked before any drawing operation. 579 */ 580 void clearLayerRegions(); 581 582 /** 583 * Mark the layer as dirty at the specified coordinates. The coordinates 584 * are transformed with the supplied matrix. 585 */ 586 void dirtyLayer(const float left, const float top, 587 const float right, const float bottom, const mat4 transform); 588 589 /** 590 * Mark the layer as dirty at the specified coordinates. 591 */ 592 void dirtyLayer(const float left, const float top, 593 const float right, const float bottom); 594 595 /** 596 * Draws a colored rectangle with the specified color. The specified coordinates 597 * are transformed by the current snapshot's transform matrix unless specified 598 * otherwise. 599 * 600 * @param left The left coordinate of the rectangle 601 * @param top The top coordinate of the rectangle 602 * @param right The right coordinate of the rectangle 603 * @param bottom The bottom coordinate of the rectangle 604 * @param paint The paint containing the color, blending mode, etc. 605 * @param ignoreTransform True if the current transform should be ignored 606 */ 607 void drawColorRect(float left, float top, float right, float bottom, 608 const SkPaint* paint, bool ignoreTransform = false); 609 610 /** 611 * Draws a series of colored rectangles with the specified color. The specified 612 * coordinates are transformed by the current snapshot's transform matrix unless 613 * specified otherwise. 614 * 615 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 616 * per rectangle 617 * @param paint The paint containing the color, blending mode, etc. 618 * @param ignoreTransform True if the current transform should be ignored 619 * @param dirty True if calling this method should dirty the current layer 620 * @param clip True if the rects should be clipped, false otherwise 621 */ 622 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 623 bool ignoreTransform = false, bool dirty = true, bool clip = true); 624 625 /** 626 * Draws the shape represented by the specified path texture. 627 * This method invokes drawPathTexture() but takes into account 628 * the extra left/top offset and the texture offset to correctly 629 * position the final shape. 630 * 631 * @param left The left coordinate of the shape to render 632 * @param top The top coordinate of the shape to render 633 * @param texture The texture reprsenting the shape 634 * @param paint The paint to draw the shape with 635 */ 636 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 637 638 /** 639 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 640 * different compositing rules. 641 * 642 * @param texture The texture to draw with 643 * @param left The x coordinate of the bitmap 644 * @param top The y coordinate of the bitmap 645 * @param paint The paint to render with 646 */ 647 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 648 649 /** 650 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 651 * 652 * @param vertexBuffer The VertexBuffer to be drawn 653 * @param paint The paint to render with 654 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 655 */ 656 status_t drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 657 const SkPaint* paint, bool useOffset = false); 658 659 /** 660 * Convenience for translating method 661 */ 662 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, 663 const SkPaint* paint, bool useOffset = false) { 664 return drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, useOffset); 665 } 666 667 /** 668 * Renders the convex hull defined by the specified path as a strip of polygons. 669 * 670 * @param path The hull of the path to draw 671 * @param paint The paint to render with 672 */ 673 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 674 675 /** 676 * Draws a textured rectangle with the specified texture. The specified coordinates 677 * are transformed by the current snapshot's transform matrix. 678 * 679 * @param left The left coordinate of the rectangle 680 * @param top The top coordinate of the rectangle 681 * @param right The right coordinate of the rectangle 682 * @param bottom The bottom coordinate of the rectangle 683 * @param texture The texture to use 684 * @param paint The paint containing the alpha, blending mode, etc. 685 */ 686 void drawTextureRect(float left, float top, float right, float bottom, 687 Texture* texture, const SkPaint* paint); 688 689 /** 690 * Draws a textured mesh with the specified texture. If the indices are omitted, 691 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 692 * VBO is bound. 693 * 694 * @param left The left coordinate of the rectangle 695 * @param top The top coordinate of the rectangle 696 * @param right The right coordinate of the rectangle 697 * @param bottom The bottom coordinate of the rectangle 698 * @param texture The texture name to map onto the rectangle 699 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 700 * @param blend True if the texture contains an alpha channel 701 * @param vertices The vertices that define the mesh 702 * @param texCoords The texture coordinates of each vertex 703 * @param elementsCount The number of elements in the mesh, required by indices 704 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 705 * @param ignoreTransform True if the current transform should be ignored 706 * @param vbo The VBO used to draw the mesh 707 * @param modelViewMode Defines whether the model view matrix should be scaled 708 * @param dirty True if calling this method should dirty the current layer 709 */ 710 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 711 const SkPaint* paint, bool blend, 712 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 713 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 714 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 715 716 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 717 const SkPaint* paint, bool blend, 718 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 719 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 720 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 721 722 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 723 GLuint texture, const SkPaint* paint, 724 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 725 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 726 bool dirty = true); 727 728 /** 729 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 730 * If the number of vertices to draw exceeds the number of indices we have 731 * pre-allocated, this method will generate several glDrawElements() calls. 732 */ 733 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 734 735 /** 736 * Draws text underline and strike-through if needed. 737 * 738 * @param text The text to decor 739 * @param bytesCount The number of bytes in the text 740 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 741 * @param x The x coordinate where the text will be drawn 742 * @param y The y coordinate where the text will be drawn 743 * @param paint The paint to draw the text with 744 */ 745 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 746 747 /** 748 * Draws shadow layer on text (with optional positions). 749 * 750 * @param paint The paint to draw the shadow with 751 * @param text The text to draw 752 * @param bytesCount The number of bytes in the text 753 * @param count The number of glyphs in the text 754 * @param positions The x, y positions of individual glyphs (or NULL) 755 * @param fontRenderer The font renderer object 756 * @param alpha The alpha value for drawing the shadow 757 * @param x The x coordinate where the shadow will be drawn 758 * @param y The y coordinate where the shadow will be drawn 759 */ 760 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 761 const float* positions, FontRenderer& fontRenderer, int alpha, 762 float x, float y); 763 764 /** 765 * Draws a path texture. Path textures are alpha8 bitmaps that need special 766 * compositing to apply colors/filters/etc. 767 * 768 * @param texture The texture to render 769 * @param x The x coordinate where the texture will be drawn 770 * @param y The y coordinate where the texture will be drawn 771 * @param paint The paint to draw the texture with 772 */ 773 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 774 775 /** 776 * Resets the texture coordinates stored in mMeshVertices. Setting the values 777 * back to default is achieved by calling: 778 * 779 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 780 * 781 * @param u1 The left coordinate of the texture 782 * @param v1 The bottom coordinate of the texture 783 * @param u2 The right coordinate of the texture 784 * @param v2 The top coordinate of the texture 785 */ 786 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 787 788 /** 789 * Returns true if the specified paint will draw invisible text. 790 */ 791 bool canSkipText(const SkPaint* paint) const; 792 793 /** 794 * Binds the specified texture. The texture unit must have been selected 795 * prior to calling this method. 796 */ 797 inline void bindTexture(GLuint texture) { 798 mCaches.bindTexture(texture); 799 } 800 801 /** 802 * Binds the specified EGLImage texture. The texture unit must have been selected 803 * prior to calling this method. 804 */ 805 inline void bindExternalTexture(GLuint texture) { 806 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 807 } 808 809 /** 810 * Enable or disable blending as necessary. This function sets the appropriate 811 * blend function based on the specified xfermode. 812 */ 813 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 814 bool swapSrcDst = false); 815 816 /** 817 * Use the specified program with the current GL context. If the program is already 818 * in use, it will not be bound again. If it is not in use, the current program is 819 * marked unused and the specified program becomes used and becomes the new 820 * current program. 821 * 822 * @param program The program to use 823 * 824 * @return true If the specified program was already in use, false otherwise. 825 */ 826 inline bool useProgram(Program* program); 827 828 /** 829 * Invoked before any drawing operation. This sets required state. 830 */ 831 void setupDraw(bool clear = true); 832 833 /** 834 * Various methods to setup OpenGL rendering. 835 */ 836 void setupDrawWithTexture(bool isAlpha8 = false); 837 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 838 void setupDrawWithExternalTexture(); 839 void setupDrawNoTexture(); 840 void setupDrawAA(); 841 void setupDrawColor(int color, int alpha); 842 void setupDrawColor(float r, float g, float b, float a); 843 void setupDrawAlpha8Color(int color, int alpha); 844 void setupDrawTextGamma(const SkPaint* paint); 845 void setupDrawShader(const SkShader* shader); 846 void setupDrawColorFilter(const SkColorFilter* filter); 847 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 848 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 849 void setupDrawProgram(); 850 void setupDrawDirtyRegionsDisabled(); 851 852 /** 853 * Setup the current program matrices based upon the nature of the geometry. 854 * 855 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 856 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 857 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 858 * transformations are stored in the modelView matrix and uploaded to the shader. 859 * 860 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 861 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 862 * 863 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 864 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 865 * or when simple translation has been extracted) 866 */ 867 void setupDrawModelView(ModelViewMode mode, bool offset, 868 float left, float top, float right, float bottom, bool ignoreTransform = false); 869 void setupDrawColorUniforms(bool hasShader); 870 void setupDrawPureColorUniforms(); 871 872 /** 873 * Setup uniforms for the current shader. 874 * 875 * @param shader SkShader on the current paint. 876 * 877 * @param ignoreTransform Set to true to ignore the transform in shader. 878 */ 879 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 880 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 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, const SkPaint& paint, bool dirty = false); 910 911 /** 912 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 913 * is turned on. 914 */ 915 void debugClip(); 916 917 void debugOverdraw(bool enable, bool clear); 918 void renderOverdraw(); 919 void countOverdraw(); 920 921 /** 922 * Should be invoked every time the glScissor is modified. 923 */ 924 inline void dirtyClip() { 925 mDirtyClip = true; 926 } 927 928 inline const UvMapper& getMapper(const Texture* texture) { 929 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 930 } 931 932 /** 933 * Returns a texture object for the specified bitmap. The texture can 934 * come from the texture cache or an atlas. If this method returns 935 * NULL, the texture could not be found and/or allocated. 936 */ 937 Texture* getTexture(const SkBitmap* bitmap); 938 939 /** 940 * Model-view matrix used to position/size objects 941 * 942 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 943 * currentTransform(). 944 * 945 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 946 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 947 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 948 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 949 * of a bitmap. 950 * 951 * Used as input to SkiaShader transformation. 952 */ 953 mat4 mModelViewMatrix; 954 955 // State used to define the clipping region 956 Rect mTilingClip; 957 // Is the target render surface opaque 958 bool mOpaque; 959 // Is a frame currently being rendered 960 bool mFrameStarted; 961 962 // Used to draw textured quads 963 TextureVertex mMeshVertices[4]; 964 965 // Default UV mapper 966 const UvMapper mUvMapper; 967 968 // shader, filters, and shadow 969 DrawModifiers mDrawModifiers; 970 SkPaint mFilteredPaint; 971 972 // Various caches 973 Caches& mCaches; 974 Extensions& mExtensions; 975 RenderState& mRenderState; 976 977 // List of rectangles to clear after saveLayer() is invoked 978 Vector<Rect*> mLayers; 979 // List of layers to update at the beginning of a frame 980 Vector<Layer*> mLayerUpdates; 981 982 // The following fields are used to setup drawing 983 // Used to describe the shaders to generate 984 ProgramDescription mDescription; 985 // Color description 986 bool mColorSet; 987 float mColorA, mColorR, mColorG, mColorB; 988 // Indicates that the shader should get a color 989 bool mSetShaderColor; 990 // Current texture unit 991 GLuint mTextureUnit; 992 // Track dirty regions, true by default 993 bool mTrackDirtyRegions; 994 // Indicate whether we are drawing an opaque frame 995 bool mOpaqueFrame; 996 997 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 998 // Properties.h 999 bool mScissorOptimizationDisabled; 1000 1001 // No-ops start/endTiling when set 1002 bool mSuppressTiling; 1003 1004 // If true, this renderer will setup drawing to emulate 1005 // an increment stencil buffer in the color buffer 1006 bool mCountOverdraw; 1007 float mOverdraw; 1008 1009 bool mSkipOutlineClip; 1010 1011 friend class Layer; 1012 friend class TextSetupFunctor; 1013 friend class DrawBitmapOp; 1014 friend class DrawPatchOp; 1015 1016}; // class OpenGLRenderer 1017 1018}; // namespace uirenderer 1019}; // namespace android 1020 1021#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1022