OpenGLRenderer.h revision 107843de4507b3511006cb9c77b8d0364374385a
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 "Snapshot.h" 47#include "StatefulBaseRenderer.h" 48#include "UvMapper.h" 49#include "Vertex.h" 50#include "Caches.h" 51 52class SkShader; 53 54namespace android { 55namespace uirenderer { 56 57class DeferredDisplayState; 58class RenderState; 59class RenderNode; 60class TextSetupFunctor; 61class VertexBuffer; 62 63struct DrawModifiers { 64 DrawModifiers() { 65 reset(); 66 } 67 68 void reset() { 69 memset(this, 0, sizeof(DrawModifiers)); 70 } 71 72 float mOverrideLayerAlpha; 73}; 74 75enum StateDeferFlags { 76 kStateDeferFlag_Draw = 0x1, 77 kStateDeferFlag_Clip = 0x2 78}; 79 80enum ClipSideFlags { 81 kClipSide_None = 0x0, 82 kClipSide_Left = 0x1, 83 kClipSide_Top = 0x2, 84 kClipSide_Right = 0x4, 85 kClipSide_Bottom = 0x8, 86 kClipSide_Full = 0xF, 87 kClipSide_ConservativeFull = 0x1F 88}; 89 90enum VertexBufferDisplayFlags { 91 kVertexBuffer_Offset = 0x1, 92 kVertexBuffer_ShadowInterp = 0x2, 93}; 94 95/** 96 * Defines additional transformation that should be applied by the model view matrix, beyond that of 97 * the currentTransform() 98 */ 99enum ModelViewMode { 100 /** 101 * Used when the model view should simply translate geometry passed to the shader. The resulting 102 * matrix will be a simple translation. 103 */ 104 kModelViewMode_Translate = 0, 105 106 /** 107 * Used when the model view should translate and scale geometry. The resulting matrix will be a 108 * translation + scale. This is frequently used together with VBO 0, the (0,0,1,1) rect. 109 */ 110 kModelViewMode_TranslateAndScale = 1, 111}; 112 113/////////////////////////////////////////////////////////////////////////////// 114// Renderer 115/////////////////////////////////////////////////////////////////////////////// 116/** 117 * OpenGL Renderer implementation. 118 */ 119class OpenGLRenderer : public StatefulBaseRenderer { 120public: 121 OpenGLRenderer(RenderState& renderState); 122 virtual ~OpenGLRenderer(); 123 124 void initProperties(); 125 void initLight(const Vector3& lightCenter, float lightRadius, 126 uint8_t ambientShadowAlpha, uint8_t spotShadowAlpha); 127 128 virtual void onViewportInitialized(); 129 virtual void prepareDirty(float left, float top, float right, float bottom, bool opaque); 130 virtual bool finish(); 131 132 virtual void callDrawGLFunction(Functor* functor, Rect& dirty); 133 134 void pushLayerUpdate(Layer* layer); 135 void cancelLayerUpdate(Layer* layer); 136 void flushLayerUpdates(); 137 void markLayersAsBuildLayers(); 138 139 virtual int saveLayer(float left, float top, float right, float bottom, 140 const SkPaint* paint, int flags) { 141 return saveLayer(left, top, right, bottom, paint, flags, NULL); 142 } 143 144 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 145 // created, which will in turn clip to that mask when drawn back/restored. 146 int saveLayer(float left, float top, float right, float bottom, 147 const SkPaint* paint, int flags, const SkPath* convexMask); 148 149 int saveLayerDeferred(float left, float top, float right, float bottom, 150 const SkPaint* paint, int flags); 151 152 virtual void drawRenderNode(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 153 virtual void drawLayer(Layer* layer, float x, float y); 154 virtual void drawBitmap(const SkBitmap* bitmap, const SkPaint* paint); 155 void drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 156 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 157 virtual void drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 158 float srcRight, float srcBottom, float dstLeft, float dstTop, 159 float dstRight, float dstBottom, const SkPaint* paint); 160 virtual void drawBitmapData(const SkBitmap* bitmap, const SkPaint* paint); 161 virtual void drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 162 const float* vertices, const int* colors, const SkPaint* paint); 163 void drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 164 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 165 virtual void drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 166 float left, float top, float right, float bottom, const SkPaint* paint); 167 void drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 168 float left, float top, float right, float bottom, const SkPaint* paint); 169 virtual void drawColor(int color, SkXfermode::Mode mode); 170 virtual void drawRect(float left, float top, float right, float bottom, 171 const SkPaint* paint); 172 virtual void drawRoundRect(float left, float top, float right, float bottom, 173 float rx, float ry, const SkPaint* paint); 174 virtual void drawCircle(float x, float y, float radius, const SkPaint* paint); 175 virtual void drawOval(float left, float top, float right, float bottom, 176 const SkPaint* paint); 177 virtual void drawArc(float left, float top, float right, float bottom, 178 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 179 virtual void drawPath(const SkPath* path, const SkPaint* paint); 180 virtual void drawLines(const float* points, int count, const SkPaint* paint); 181 virtual void drawPoints(const float* points, int count, const SkPaint* paint); 182 virtual void drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 183 float hOffset, float vOffset, const SkPaint* paint); 184 virtual void drawPosText(const char* text, int bytesCount, int count, 185 const float* positions, const SkPaint* paint); 186 virtual void drawText(const char* text, int bytesCount, int count, float x, float y, 187 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 188 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 189 virtual void drawRects(const float* rects, int count, const SkPaint* paint); 190 191 void drawShadow(float casterAlpha, 192 const VertexBuffer* ambientShadowVertexBuffer, const VertexBuffer* spotShadowVertexBuffer); 193 194 virtual void setDrawFilter(SkDrawFilter* filter); 195 196 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 197 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 198 199 /** 200 * Store the current display state (most importantly, the current clip and transform), and 201 * additionally map the state's bounds from local to window coordinates. 202 * 203 * Returns true if quick-rejected 204 */ 205 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 206 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 207 void setupMergedMultiDraw(const Rect* clipRect); 208 209 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 210 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 211 212 bool isCurrentTransformSimple() { 213 return currentTransform()->isSimple(); 214 } 215 216 Caches& getCaches() { 217 return mCaches; 218 } 219 220 // simple rect clip 221 bool isCurrentClipSimple() { 222 return mSnapshot->clipRegion->isEmpty(); 223 } 224 225 int getViewportWidth() { return currentSnapshot()->getViewportWidth(); } 226 int getViewportHeight() { return currentSnapshot()->getViewportHeight(); } 227 228 /** 229 * Scales the alpha on the current snapshot. This alpha value will be modulated 230 * with other alpha values when drawing primitives. 231 */ 232 void scaleAlpha(float alpha) { 233 mSnapshot->alpha *= alpha; 234 } 235 236 /** 237 * Inserts a named event marker in the stream of GL commands. 238 */ 239 void eventMark(const char* name) const; 240 241 /** 242 * Inserts a formatted event marker in the stream of GL commands. 243 */ 244 void eventMarkDEBUG(const char *fmt, ...) const; 245 246 /** 247 * Inserts a named group marker in the stream of GL commands. This marker 248 * can be used by tools to group commands into logical groups. A call to 249 * this method must always be followed later on by a call to endMark(). 250 */ 251 void startMark(const char* name) const; 252 253 /** 254 * Closes the last group marker opened by startMark(). 255 */ 256 void endMark() const; 257 258 /** 259 * Gets the alpha and xfermode out of a paint object. If the paint is null 260 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 261 * not multiply the paint's alpha by the current snapshot's alpha, and does 262 * not replace the alpha with the overrideLayerAlpha 263 * 264 * @param paint The paint to extract values from 265 * @param alpha Where to store the resulting alpha 266 * @param mode Where to store the resulting xfermode 267 */ 268 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 269 *mode = getXfermodeDirect(paint); 270 *alpha = getAlphaDirect(paint); 271 } 272 273 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 274 if (!paint) return SkXfermode::kSrcOver_Mode; 275 return getXfermode(paint->getXfermode()); 276 } 277 278 static inline int getAlphaDirect(const SkPaint* paint) { 279 if (!paint) return 255; 280 return paint->getAlpha(); 281 } 282 283 struct TextShadow { 284 SkScalar radius; 285 float dx; 286 float dy; 287 SkColor color; 288 }; 289 290 static inline bool getTextShadow(const SkPaint* paint, TextShadow* textShadow) { 291 SkDrawLooper::BlurShadowRec blur; 292 if (paint && paint->getLooper() && paint->getLooper()->asABlurShadow(&blur)) { 293 if (textShadow) { 294 textShadow->radius = Blur::convertSigmaToRadius(blur.fSigma); 295 textShadow->dx = blur.fOffset.fX; 296 textShadow->dy = blur.fOffset.fY; 297 textShadow->color = blur.fColor; 298 } 299 return true; 300 } 301 return false; 302 } 303 304 static inline bool hasTextShadow(const SkPaint* paint) { 305 return getTextShadow(paint, NULL); 306 } 307 308 /** 309 * Build the best transform to use to rasterize text given a full 310 * transform matrix, and whether filteration is needed. 311 * 312 * Returns whether filtration is needed 313 */ 314 bool findBestFontTransform(const mat4& transform, SkMatrix* outMatrix) const; 315 316#if DEBUG_MERGE_BEHAVIOR 317 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 318 mCaches.setScissorEnabled(false); 319 320 // should only be called outside of other draw ops, so stencil can only be in test state 321 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 322 mCaches.stencil.disable(); 323 324 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 325 326 if (stencilWasEnabled) mCaches.stencil.enableTest(); 327 mDirty = true; 328 } 329#endif 330 331 const Vector3& getLightCenter() const { return currentSnapshot()->getRelativeLightCenter(); } 332 float getLightRadius() const { return mLightRadius; } 333 uint8_t getAmbientShadowAlpha() const { return mAmbientShadowAlpha; } 334 uint8_t getSpotShadowAlpha() const { return mSpotShadowAlpha; } 335 336protected: 337 /** 338 * Perform the setup specific to a frame. This method does not 339 * issue any OpenGL commands. 340 */ 341 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 342 343 /** 344 * Indicates the start of rendering. This method will setup the 345 * initial OpenGL state (viewport, clearing the buffer, etc.) 346 */ 347 void startFrame(); 348 349 /** 350 * Clears the underlying surface if needed. 351 */ 352 virtual void clear(float left, float top, float right, float bottom, bool opaque); 353 354 /** 355 * Call this method after updating a layer during a drawing pass. 356 */ 357 void resumeAfterLayer(); 358 359 /** 360 * This method is called whenever a stencil buffer is required. Subclasses 361 * should override this method and call attachStencilBufferToLayer() on the 362 * appropriate layer(s). 363 */ 364 virtual void ensureStencilBuffer(); 365 366 /** 367 * Obtains a stencil render buffer (allocating it if necessary) and 368 * attaches it to the specified layer. 369 */ 370 void attachStencilBufferToLayer(Layer* layer); 371 372 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 373 const SkPaint* paint = NULL); 374 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 375 return quickRejectSetupScissor(bounds.left, bounds.top, 376 bounds.right, bounds.bottom, paint); 377 } 378 379 /** 380 * Compose the layer defined in the current snapshot with the layer 381 * defined by the previous snapshot. 382 * 383 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 384 * 385 * @param curent The current snapshot containing the layer to compose 386 * @param previous The previous snapshot to compose the current layer with 387 */ 388 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 389 390 /** 391 * Marks the specified region as dirty at the specified bounds. 392 */ 393 void dirtyLayerUnchecked(Rect& bounds, Region* region); 394 395 /** 396 * Returns the region of the current layer. 397 */ 398 virtual Region* getRegion() const { 399 return mSnapshot->region; 400 } 401 402 /** 403 * Indicates whether rendering is currently targeted at a layer. 404 */ 405 virtual bool hasLayer() const { 406 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 407 } 408 409 /** 410 * Returns the name of the FBO this renderer is rendering into. 411 */ 412 virtual GLuint getTargetFbo() const { 413 return 0; 414 } 415 416 /** 417 * Renders the specified layer as a textured quad. 418 * 419 * @param layer The layer to render 420 * @param rect The bounds of the layer 421 */ 422 void drawTextureLayer(Layer* layer, const Rect& rect); 423 424 /** 425 * Gets the alpha and xfermode out of a paint object. If the paint is null 426 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 427 * snapshot alpha, and overrideLayerAlpha 428 * 429 * @param paint The paint to extract values from 430 * @param alpha Where to store the resulting alpha 431 * @param mode Where to store the resulting xfermode 432 */ 433 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 434 435 /** 436 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 437 * 438 * @param layer The layer from which the alpha is extracted 439 */ 440 inline float getLayerAlpha(const Layer* layer) const; 441 442 /** 443 * Safely retrieves the ColorFilter from the given Paint. If the paint is 444 * null then null is returned. 445 */ 446 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 447 return paint ? paint->getColorFilter() : NULL; 448 } 449 450 /** 451 * Safely retrieves the Shader from the given Paint. If the paint is 452 * null then null is returned. 453 */ 454 static inline const SkShader* getShader(const SkPaint* paint) { 455 return paint ? paint->getShader() : NULL; 456 } 457 458 /** 459 * Set to true to suppress error checks at the end of a frame. 460 */ 461 virtual bool suppressErrorChecks() const { 462 return false; 463 } 464 465 inline RenderState& renderState() { return mRenderState; } 466 467private: 468 /** 469 * Discards the content of the framebuffer if supported by the driver. 470 * This method should be called at the beginning of a frame to optimize 471 * rendering on some tiler architectures. 472 */ 473 void discardFramebuffer(float left, float top, float right, float bottom); 474 475 /** 476 * Ensures the state of the renderer is the same as the state of 477 * the GL context. 478 */ 479 void syncState(); 480 481 /** 482 * Tells the GPU what part of the screen is about to be redrawn. 483 * This method will use the current layer space clip rect. 484 * This method needs to be invoked every time getTargetFbo() is 485 * bound again. 486 */ 487 void startTilingCurrentClip(bool opaque = false, bool expand = false); 488 489 /** 490 * Tells the GPU what part of the screen is about to be redrawn. 491 * This method needs to be invoked every time getTargetFbo() is 492 * bound again. 493 */ 494 void startTiling(const Rect& clip, int windowHeight, bool opaque = false, bool expand = false); 495 496 /** 497 * Tells the GPU that we are done drawing the frame or that we 498 * are switching to another render target. 499 */ 500 void endTiling(); 501 502 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 503 504 /** 505 * Sets the clipping rectangle using glScissor. The clip is defined by 506 * the current snapshot's clipRect member. 507 */ 508 void setScissorFromClip(); 509 510 /** 511 * Sets the clipping region using the stencil buffer. The clip region 512 * is defined by the current snapshot's clipRegion member. 513 */ 514 void setStencilFromClip(); 515 516 /** 517 * Given the local bounds of the layer, calculates ... 518 */ 519 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 520 521 /** 522 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 523 */ 524 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 525 bool fboLayer, int alpha); 526 527 /** 528 * Creates a new layer stored in the specified snapshot. 529 * 530 * @param snapshot The snapshot associated with the new layer 531 * @param left The left coordinate of the layer 532 * @param top The top coordinate of the layer 533 * @param right The right coordinate of the layer 534 * @param bottom The bottom coordinate of the layer 535 * @param alpha The translucency of the layer 536 * @param mode The blending mode of the layer 537 * @param flags The layer save flags 538 * @param mask A mask to use when drawing the layer back, may be empty 539 * 540 * @return True if the layer was successfully created, false otherwise 541 */ 542 bool createLayer(float left, float top, float right, float bottom, 543 const SkPaint* paint, int flags, const SkPath* convexMask); 544 545 /** 546 * Creates a new layer stored in the specified snapshot as an FBO. 547 * 548 * @param layer The layer to store as an FBO 549 * @param snapshot The snapshot associated with the new layer 550 * @param bounds The bounds of the layer 551 */ 552 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 553 554 /** 555 * Compose the specified layer as a region. 556 * 557 * @param layer The layer to compose 558 * @param rect The layer's bounds 559 */ 560 void composeLayerRegion(Layer* layer, const Rect& rect); 561 562 /** 563 * Compose the specified layer as a simple rectangle. 564 * 565 * @param layer The layer to compose 566 * @param rect The layer's bounds 567 * @param swap If true, the source and destination are swapped 568 */ 569 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 570 571 /** 572 * Clears all the regions corresponding to the current list of layers. 573 * This method MUST be invoked before any drawing operation. 574 */ 575 void clearLayerRegions(); 576 577 /** 578 * Mark the layer as dirty at the specified coordinates. The coordinates 579 * are transformed with the supplied matrix. 580 */ 581 void dirtyLayer(const float left, const float top, 582 const float right, const float bottom, const mat4 transform); 583 584 /** 585 * Mark the layer as dirty at the specified coordinates. 586 */ 587 void dirtyLayer(const float left, const float top, 588 const float right, const float bottom); 589 590 /** 591 * Draws a colored rectangle with the specified color. The specified coordinates 592 * are transformed by the current snapshot's transform matrix unless specified 593 * otherwise. 594 * 595 * @param left The left coordinate of the rectangle 596 * @param top The top coordinate of the rectangle 597 * @param right The right coordinate of the rectangle 598 * @param bottom The bottom coordinate of the rectangle 599 * @param paint The paint containing the color, blending mode, etc. 600 * @param ignoreTransform True if the current transform should be ignored 601 */ 602 void drawColorRect(float left, float top, float right, float bottom, 603 const SkPaint* paint, bool ignoreTransform = false); 604 605 /** 606 * Draws a series of colored rectangles with the specified color. The specified 607 * coordinates are transformed by the current snapshot's transform matrix unless 608 * specified otherwise. 609 * 610 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 611 * per rectangle 612 * @param paint The paint containing the color, blending mode, etc. 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 void drawColorRects(const float* rects, int count, const SkPaint* paint, 618 bool ignoreTransform = false, bool dirty = true, bool clip = true); 619 620 /** 621 * Draws the shape represented by the specified path texture. 622 * This method invokes drawPathTexture() but takes into account 623 * the extra left/top offset and the texture offset to correctly 624 * position the final shape. 625 * 626 * @param left The left coordinate of the shape to render 627 * @param top The top coordinate of the shape to render 628 * @param texture The texture reprsenting the shape 629 * @param paint The paint to draw the shape with 630 */ 631 void drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 632 633 /** 634 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 635 * different compositing rules. 636 * 637 * @param texture The texture to draw with 638 * @param left The x coordinate of the bitmap 639 * @param top The y coordinate of the bitmap 640 * @param paint The paint to render with 641 */ 642 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 643 644 /** 645 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 646 * 647 * @param vertexBuffer The VertexBuffer to be drawn 648 * @param paint The paint to render with 649 * @param flags flags with which to draw 650 */ 651 void drawVertexBuffer(float translateX, float translateY, const VertexBuffer& vertexBuffer, 652 const SkPaint* paint, int flags = 0); 653 654 /** 655 * Convenience for translating method 656 */ 657 void drawVertexBuffer(const VertexBuffer& vertexBuffer, 658 const SkPaint* paint, int flags = 0) { 659 drawVertexBuffer(0.0f, 0.0f, vertexBuffer, paint, flags); 660 } 661 662 /** 663 * Renders the convex hull defined by the specified path as a strip of polygons. 664 * 665 * @param path The hull of the path to draw 666 * @param paint The paint to render with 667 */ 668 void drawConvexPath(const SkPath& path, const SkPaint* paint); 669 670 /** 671 * Draws a textured rectangle with the specified texture. The specified coordinates 672 * are transformed by the current snapshot's transform matrix. 673 * 674 * @param left The left coordinate of the rectangle 675 * @param top The top coordinate of the rectangle 676 * @param right The right coordinate of the rectangle 677 * @param bottom The bottom coordinate of the rectangle 678 * @param texture The texture to use 679 * @param paint The paint containing the alpha, blending mode, etc. 680 */ 681 void drawTextureRect(float left, float top, float right, float bottom, 682 Texture* texture, const SkPaint* paint); 683 684 /** 685 * Draws a textured mesh with the specified texture. If the indices are omitted, 686 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 687 * VBO is bound. 688 * 689 * @param left The left coordinate of the rectangle 690 * @param top The top coordinate of the rectangle 691 * @param right The right coordinate of the rectangle 692 * @param bottom The bottom coordinate of the rectangle 693 * @param texture The texture name to map onto the rectangle 694 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 695 * @param blend True if the texture contains an alpha channel 696 * @param vertices The vertices that define the mesh 697 * @param texCoords The texture coordinates of each vertex 698 * @param elementsCount The number of elements in the mesh, required by indices 699 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 700 * @param ignoreTransform True if the current transform should be ignored 701 * @param vbo The VBO used to draw the mesh 702 * @param modelViewMode Defines whether the model view matrix should be scaled 703 * @param dirty True if calling this method should dirty the current layer 704 */ 705 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 706 const SkPaint* paint, bool blend, 707 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 708 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 709 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 710 711 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 712 const SkPaint* paint, bool blend, 713 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 714 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 715 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 716 717 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 718 GLuint texture, const SkPaint* paint, 719 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 720 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 721 bool dirty = true); 722 723 /** 724 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 725 * If the number of vertices to draw exceeds the number of indices we have 726 * pre-allocated, this method will generate several glDrawElements() calls. 727 */ 728 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 729 730 /** 731 * Draws text underline and strike-through if needed. 732 * 733 * @param text The text to decor 734 * @param bytesCount The number of bytes in the text 735 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 736 * @param x The x coordinate where the text will be drawn 737 * @param y The y coordinate where the text will be drawn 738 * @param paint The paint to draw the text with 739 */ 740 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 741 742 /** 743 * Draws shadow layer on text (with optional positions). 744 * 745 * @param paint The paint to draw the shadow with 746 * @param text The text to draw 747 * @param bytesCount The number of bytes in the text 748 * @param count The number of glyphs in the text 749 * @param positions The x, y positions of individual glyphs (or NULL) 750 * @param fontRenderer The font renderer object 751 * @param alpha The alpha value for drawing the shadow 752 * @param x The x coordinate where the shadow will be drawn 753 * @param y The y coordinate where the shadow will be drawn 754 */ 755 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 756 const float* positions, FontRenderer& fontRenderer, int alpha, 757 float x, float y); 758 759 /** 760 * Draws a path texture. Path textures are alpha8 bitmaps that need special 761 * compositing to apply colors/filters/etc. 762 * 763 * @param texture The texture to render 764 * @param x The x coordinate where the texture will be drawn 765 * @param y The y coordinate where the texture will be drawn 766 * @param paint The paint to draw the texture with 767 */ 768 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 769 770 /** 771 * Resets the texture coordinates stored in mMeshVertices. Setting the values 772 * back to default is achieved by calling: 773 * 774 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 775 * 776 * @param u1 The left coordinate of the texture 777 * @param v1 The bottom coordinate of the texture 778 * @param u2 The right coordinate of the texture 779 * @param v2 The top coordinate of the texture 780 */ 781 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 782 783 /** 784 * Returns true if the specified paint will draw invisible text. 785 */ 786 bool canSkipText(const SkPaint* paint) const; 787 788 /** 789 * Binds the specified texture. The texture unit must have been selected 790 * prior to calling this method. 791 */ 792 inline void bindTexture(GLuint texture) { 793 mCaches.bindTexture(texture); 794 } 795 796 /** 797 * Binds the specified EGLImage texture. The texture unit must have been selected 798 * prior to calling this method. 799 */ 800 inline void bindExternalTexture(GLuint texture) { 801 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 802 } 803 804 /** 805 * Enable or disable blending as necessary. This function sets the appropriate 806 * blend function based on the specified xfermode. 807 */ 808 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 809 bool swapSrcDst = false); 810 811 /** 812 * Use the specified program with the current GL context. If the program is already 813 * in use, it will not be bound again. If it is not in use, the current program is 814 * marked unused and the specified program becomes used and becomes the new 815 * current program. 816 * 817 * @param program The program to use 818 * 819 * @return true If the specified program was already in use, false otherwise. 820 */ 821 inline bool useProgram(Program* program); 822 823 /** 824 * Invoked before any drawing operation. This sets required state. 825 */ 826 void setupDraw(bool clear = true); 827 828 /** 829 * Various methods to setup OpenGL rendering. 830 */ 831 void setupDrawWithTexture(bool isAlpha8 = false); 832 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 833 void setupDrawWithExternalTexture(); 834 void setupDrawNoTexture(); 835 void setupDrawVertexAlpha(bool useShadowAlphaInterp); 836 void setupDrawColor(int color, int alpha); 837 void setupDrawColor(float r, float g, float b, float a); 838 void setupDrawAlpha8Color(int color, int alpha); 839 void setupDrawTextGamma(const SkPaint* paint); 840 void setupDrawShader(const SkShader* shader); 841 void setupDrawColorFilter(const SkColorFilter* filter); 842 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 843 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 844 void setupDrawProgram(); 845 void setupDrawDirtyRegionsDisabled(); 846 847 /** 848 * Setup the current program matrices based upon the nature of the geometry. 849 * 850 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 851 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 852 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 853 * transformations are stored in the modelView matrix and uploaded to the shader. 854 * 855 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 856 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 857 * 858 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 859 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 860 * or when simple translation has been extracted) 861 */ 862 void setupDrawModelView(ModelViewMode mode, bool offset, 863 float left, float top, float right, float bottom, bool ignoreTransform = false); 864 void setupDrawColorUniforms(bool hasShader); 865 void setupDrawPureColorUniforms(); 866 867 /** 868 * Setup uniforms for the current shader. 869 * 870 * @param shader SkShader on the current paint. 871 * 872 * @param ignoreTransform Set to true to ignore the transform in shader. 873 */ 874 void setupDrawShaderUniforms(const SkShader* shader, bool ignoreTransform = false); 875 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 876 void setupDrawSimpleMesh(); 877 void setupDrawTexture(GLuint texture); 878 void setupDrawExternalTexture(GLuint texture); 879 void setupDrawTextureTransform(); 880 void setupDrawTextureTransformUniforms(mat4& transform); 881 void setupDrawTextGammaUniforms(); 882 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 883 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 884 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 885 void setupDrawIndexedVertices(GLvoid* vertices); 886 void accountForClear(SkXfermode::Mode mode); 887 888 bool updateLayer(Layer* layer, bool inFrame); 889 void updateLayers(); 890 void flushLayers(); 891 892#if DEBUG_LAYERS_AS_REGIONS 893 /** 894 * Renders the specified region as a series of rectangles. This method 895 * is used for debugging only. 896 */ 897 void drawRegionRectsDebug(const Region& region); 898#endif 899 900 /** 901 * Renders the specified region as a series of rectangles. The region 902 * must be in screen-space coordinates. 903 */ 904 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 905 906 /** 907 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 908 * is turned on. 909 */ 910 void debugClip(); 911 912 void debugOverdraw(bool enable, bool clear); 913 void renderOverdraw(); 914 void countOverdraw(); 915 916 /** 917 * Should be invoked every time the glScissor is modified. 918 */ 919 inline void dirtyClip() { 920 mDirtyClip = true; 921 } 922 923 inline const UvMapper& getMapper(const Texture* texture) { 924 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 925 } 926 927 /** 928 * Returns a texture object for the specified bitmap. The texture can 929 * come from the texture cache or an atlas. If this method returns 930 * NULL, the texture could not be found and/or allocated. 931 */ 932 Texture* getTexture(const SkBitmap* bitmap); 933 934 bool reportAndClearDirty() { bool ret = mDirty; mDirty = false; return ret; } 935 936 /** 937 * Model-view matrix used to position/size objects 938 * 939 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 940 * currentTransform(). 941 * 942 * If generated with kModelViewMode_Translate, mModelViewMatrix will reflect an x/y offset, 943 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 944 * mModelViewMatrix will reflect a translation and scale, e.g. the translation and scale 945 * required to make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height 946 * of a bitmap. 947 * 948 * Used as input to SkiaShader transformation. 949 */ 950 mat4 mModelViewMatrix; 951 952 // State used to define the clipping region 953 Rect mTilingClip; 954 // Is the target render surface opaque 955 bool mOpaque; 956 // Is a frame currently being rendered 957 bool mFrameStarted; 958 959 // Used to draw textured quads 960 TextureVertex mMeshVertices[4]; 961 962 // Default UV mapper 963 const UvMapper mUvMapper; 964 965 // shader, filters, and shadow 966 DrawModifiers mDrawModifiers; 967 SkPaint mFilteredPaint; 968 969 // Various caches 970 Caches& mCaches; 971 Extensions& mExtensions; 972 RenderState& mRenderState; 973 974 // List of rectangles to clear after saveLayer() is invoked 975 Vector<Rect*> mLayers; 976 // List of layers to update at the beginning of a frame 977 Vector< sp<Layer> > mLayerUpdates; 978 979 // The following fields are used to setup drawing 980 // Used to describe the shaders to generate 981 ProgramDescription mDescription; 982 // Color description 983 bool mColorSet; 984 float mColorA, mColorR, mColorG, mColorB; 985 // Indicates that the shader should get a color 986 bool mSetShaderColor; 987 // Current texture unit 988 GLuint mTextureUnit; 989 // Track dirty regions, true by default 990 bool mTrackDirtyRegions; 991 // Indicate whether we are drawing an opaque frame 992 bool mOpaqueFrame; 993 994 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 995 // Properties.h 996 bool mScissorOptimizationDisabled; 997 998 // No-ops start/endTiling when set 999 bool mSuppressTiling; 1000 bool mFirstFrameAfterResize; 1001 1002 bool mSkipOutlineClip; 1003 1004 // True if anything has been drawn since the last call to 1005 // reportAndClearDirty() 1006 bool mDirty; 1007 1008 // Lighting + shadows 1009 Vector3 mLightCenter; 1010 float mLightRadius; 1011 uint8_t mAmbientShadowAlpha; 1012 uint8_t mSpotShadowAlpha; 1013 1014 friend class Layer; 1015 friend class TextSetupFunctor; 1016 friend class DrawBitmapOp; 1017 friend class DrawPatchOp; 1018 1019}; // class OpenGLRenderer 1020 1021}; // namespace uirenderer 1022}; // namespace android 1023 1024#endif // ANDROID_HWUI_OPENGL_RENDERER_H 1025