OpenGLRenderer.h revision 3f085429fd47ebd32ac2463b3eae2a5a6c17be25
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 <SkShader.h> 30#include <SkXfermode.h> 31 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 "StatefulBaseRenderer.h" 48#include "Snapshot.h" 49#include "UvMapper.h" 50#include "Vertex.h" 51#include "Caches.h" 52 53namespace android { 54namespace uirenderer { 55 56class DeferredDisplayState; 57class RenderNode; 58class TextSetupFunctor; 59class VertexBuffer; 60class SkiaShader; 61 62struct DrawModifiers { 63 DrawModifiers() { 64 reset(); 65 } 66 67 void reset() { 68 memset(this, 0, sizeof(DrawModifiers)); 69 } 70 71 SkiaShader* mShader; 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 120enum VertexBufferMode { 121 kVertexBufferMode_Standard = 0, 122 kVertexBufferMode_OnePolyRingShadow = 1, 123 kVertexBufferMode_TwoPolyRingShadow = 2 124}; 125 126/////////////////////////////////////////////////////////////////////////////// 127// Renderer 128/////////////////////////////////////////////////////////////////////////////// 129/** 130 * OpenGL Renderer implementation. 131 */ 132class OpenGLRenderer : public StatefulBaseRenderer { 133public: 134 ANDROID_API OpenGLRenderer(); 135 virtual ~OpenGLRenderer(); 136 137 ANDROID_API void initProperties(); 138 139 virtual void setViewport(int width, int height); 140 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 141 virtual void finish(); 142 virtual void interrupt(); 143 virtual void resume(); 144 145 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 146 mCountOverdraw = enabled; 147 } 148 149 ANDROID_API float getOverdraw() { 150 return mCountOverdraw ? mOverdraw : 0.0f; 151 } 152 153 ANDROID_API status_t invokeFunctors(Rect& dirty); 154 ANDROID_API void detachFunctor(Functor* functor); 155 ANDROID_API void attachFunctor(Functor* functor); 156 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 157 158 ANDROID_API void pushLayerUpdate(Layer* layer); 159 ANDROID_API void cancelLayerUpdate(Layer* layer); 160 ANDROID_API void clearLayerUpdates(); 161 ANDROID_API void flushLayerUpdates(); 162 163 ANDROID_API virtual int saveLayer(float left, float top, float right, float bottom, 164 const SkPaint* paint, int flags) { 165 return saveLayer(left, top, right, bottom, paint, flags, NULL); 166 } 167 168 // Specialized saveLayer implementation, which will pass the convexMask to an FBO layer, if 169 // created, which will in turn clip to that mask when drawn back/restored. 170 int saveLayer(float left, float top, float right, float bottom, 171 const SkPaint* paint, int flags, const SkPath* convexMask); 172 173 int saveLayerDeferred(float left, float top, float right, float bottom, 174 const SkPaint* paint, int flags); 175 176 virtual status_t drawDisplayList(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 177 virtual status_t drawLayer(Layer* layer, float x, float y); 178 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 179 const SkPaint* paint); 180 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 181 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 182 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 183 const SkPaint* paint); 184 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 185 float srcRight, float srcBottom, float dstLeft, float dstTop, 186 float dstRight, float dstBottom, const SkPaint* paint); 187 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 188 const SkPaint* paint); 189 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 190 const float* vertices, const int* colors, const SkPaint* paint); 191 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 192 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 193 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 194 float left, float top, float right, float bottom, const SkPaint* paint); 195 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 196 float left, float top, float right, float bottom, const SkPaint* paint); 197 virtual status_t drawColor(int color, SkXfermode::Mode mode); 198 virtual status_t drawRect(float left, float top, float right, float bottom, 199 const SkPaint* paint); 200 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 201 float rx, float ry, const SkPaint* paint); 202 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 203 virtual status_t drawOval(float left, float top, float right, float bottom, 204 const SkPaint* paint); 205 virtual status_t drawArc(float left, float top, float right, float bottom, 206 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 207 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 208 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 209 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 210 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 211 float hOffset, float vOffset, const SkPaint* paint); 212 virtual status_t drawPosText(const char* text, int bytesCount, int count, 213 const float* positions, const SkPaint* paint); 214 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 215 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 216 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 217 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 218 219 status_t drawShadow(const mat4& casterTransformXY, const mat4& casterTransformZ, 220 float casterAlpha, bool casterUnclipped, const SkPath* casterPerimeter); 221 222 virtual void resetShader(); 223 virtual void setupShader(SkiaShader* shader); 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(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 * Set to true to suppress error checks at the end of a frame. 457 */ 458 virtual bool suppressErrorChecks() const { 459 return false; 460 } 461 462private: 463 /** 464 * Discards the content of the framebuffer if supported by the driver. 465 * This method should be called at the beginning of a frame to optimize 466 * rendering on some tiler architectures. 467 */ 468 void discardFramebuffer(float left, float top, float right, float bottom); 469 470 /** 471 * Ensures the state of the renderer is the same as the state of 472 * the GL context. 473 */ 474 void syncState(); 475 476 /** 477 * Tells the GPU what part of the screen is about to be redrawn. 478 * This method will use the current layer space clip rect. 479 * This method needs to be invoked every time getTargetFbo() is 480 * bound again. 481 */ 482 void startTilingCurrentClip(bool opaque = false); 483 484 /** 485 * Tells the GPU what part of the screen is about to be redrawn. 486 * This method needs to be invoked every time getTargetFbo() is 487 * bound again. 488 */ 489 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 490 491 /** 492 * Tells the GPU that we are done drawing the frame or that we 493 * are switching to another render target. 494 */ 495 void endTiling(); 496 497 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 498 499 /** 500 * Sets the clipping rectangle using glScissor. The clip is defined by 501 * the current snapshot's clipRect member. 502 */ 503 void setScissorFromClip(); 504 505 /** 506 * Sets the clipping region using the stencil buffer. The clip region 507 * is defined by the current snapshot's clipRegion member. 508 */ 509 void setStencilFromClip(); 510 511 /** 512 * Given the local bounds of the layer, calculates ... 513 */ 514 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 515 516 /** 517 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 518 */ 519 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 520 bool fboLayer, int alpha); 521 522 /** 523 * Creates a new layer stored in the specified snapshot. 524 * 525 * @param snapshot The snapshot associated with the new layer 526 * @param left The left coordinate of the layer 527 * @param top The top coordinate of the layer 528 * @param right The right coordinate of the layer 529 * @param bottom The bottom coordinate of the layer 530 * @param alpha The translucency of the layer 531 * @param mode The blending mode of the layer 532 * @param flags The layer save flags 533 * @param mask A mask to use when drawing the layer back, may be empty 534 * 535 * @return True if the layer was successfully created, false otherwise 536 */ 537 bool createLayer(float left, float top, float right, float bottom, 538 const SkPaint* paint, int flags, const SkPath* convexMask); 539 540 /** 541 * Creates a new layer stored in the specified snapshot as an FBO. 542 * 543 * @param layer The layer to store as an FBO 544 * @param snapshot The snapshot associated with the new layer 545 * @param bounds The bounds of the layer 546 */ 547 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 548 549 /** 550 * Compose the specified layer as a region. 551 * 552 * @param layer The layer to compose 553 * @param rect The layer's bounds 554 */ 555 void composeLayerRegion(Layer* layer, const Rect& rect); 556 557 /** 558 * Compose the specified layer as a simple rectangle. 559 * 560 * @param layer The layer to compose 561 * @param rect The layer's bounds 562 * @param swap If true, the source and destination are swapped 563 */ 564 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 565 566 /** 567 * Clears all the regions corresponding to the current list of layers. 568 * This method MUST be invoked before any drawing operation. 569 */ 570 void clearLayerRegions(); 571 572 /** 573 * Mark the layer as dirty at the specified coordinates. The coordinates 574 * are transformed with the supplied matrix. 575 */ 576 void dirtyLayer(const float left, const float top, 577 const float right, const float bottom, const mat4 transform); 578 579 /** 580 * Mark the layer as dirty at the specified coordinates. 581 */ 582 void dirtyLayer(const float left, const float top, 583 const float right, const float bottom); 584 585 /** 586 * Draws a colored rectangle with the specified color. The specified coordinates 587 * are transformed by the current snapshot's transform matrix unless specified 588 * otherwise. 589 * 590 * @param left The left coordinate of the rectangle 591 * @param top The top coordinate of the rectangle 592 * @param right The right coordinate of the rectangle 593 * @param bottom The bottom coordinate of the rectangle 594 * @param paint The paint containing the color, blending mode, etc. 595 * @param ignoreTransform True if the current transform should be ignored 596 */ 597 void drawColorRect(float left, float top, float right, float bottom, 598 const SkPaint* paint, bool ignoreTransform = false); 599 600 /** 601 * Draws a series of colored rectangles with the specified color. The specified 602 * coordinates are transformed by the current snapshot's transform matrix unless 603 * specified otherwise. 604 * 605 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 606 * per rectangle 607 * @param paint The paint containing the color, blending mode, etc. 608 * @param ignoreTransform True if the current transform should be ignored 609 * @param dirty True if calling this method should dirty the current layer 610 * @param clip True if the rects should be clipped, false otherwise 611 */ 612 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 613 bool ignoreTransform = false, bool dirty = true, bool clip = true); 614 615 /** 616 * Draws the shape represented by the specified path texture. 617 * This method invokes drawPathTexture() but takes into account 618 * the extra left/top offset and the texture offset to correctly 619 * position the final shape. 620 * 621 * @param left The left coordinate of the shape to render 622 * @param top The top coordinate of the shape to render 623 * @param texture The texture reprsenting the shape 624 * @param paint The paint to draw the shape with 625 */ 626 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 627 628 /** 629 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 630 * different compositing rules. 631 * 632 * @param texture The texture to draw with 633 * @param left The x coordinate of the bitmap 634 * @param top The y coordinate of the bitmap 635 * @param paint The paint to render with 636 */ 637 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 638 639 /** 640 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 641 * 642 * @param vertexBuffer The VertexBuffer to be drawn 643 * @param paint The paint to render with 644 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 645 */ 646 status_t drawVertexBuffer(VertexBufferMode mode, const VertexBuffer& vertexBuffer, 647 const SkPaint* paint, bool useOffset = false); 648 649 /** 650 * Renders the convex hull defined by the specified path as a strip of polygons. 651 * 652 * @param path The hull of the path to draw 653 * @param paint The paint to render with 654 */ 655 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 656 657 /** 658 * Draws a textured rectangle with the specified texture. The specified coordinates 659 * are transformed by the current snapshot's transform matrix. 660 * 661 * @param left The left coordinate of the rectangle 662 * @param top The top coordinate of the rectangle 663 * @param right The right coordinate of the rectangle 664 * @param bottom The bottom coordinate of the rectangle 665 * @param texture The texture to use 666 * @param paint The paint containing the alpha, blending mode, etc. 667 */ 668 void drawTextureRect(float left, float top, float right, float bottom, 669 Texture* texture, const SkPaint* paint); 670 671 /** 672 * Draws a textured mesh with the specified texture. If the indices are omitted, 673 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 674 * VBO is bound. 675 * 676 * @param left The left coordinate of the rectangle 677 * @param top The top coordinate of the rectangle 678 * @param right The right coordinate of the rectangle 679 * @param bottom The bottom coordinate of the rectangle 680 * @param texture The texture name to map onto the rectangle 681 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 682 * @param blend True if the texture contains an alpha channel 683 * @param vertices The vertices that define the mesh 684 * @param texCoords The texture coordinates of each vertex 685 * @param elementsCount The number of elements in the mesh, required by indices 686 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 687 * @param ignoreTransform True if the current transform should be ignored 688 * @param vbo The VBO used to draw the mesh 689 * @param modelViewMode Defines whether the model view matrix should be scaled 690 * @param dirty True if calling this method should dirty the current layer 691 */ 692 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 693 const SkPaint* paint, bool blend, 694 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 695 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 696 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 697 698 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 699 const SkPaint* paint, bool blend, 700 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 701 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 702 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 703 704 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 705 GLuint texture, const SkPaint* paint, 706 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 707 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 708 bool dirty = true); 709 710 /** 711 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 712 * If the number of vertices to draw exceeds the number of indices we have 713 * pre-allocated, this method will generate several glDrawElements() calls. 714 */ 715 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 716 717 /** 718 * Draws text underline and strike-through if needed. 719 * 720 * @param text The text to decor 721 * @param bytesCount The number of bytes in the text 722 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 723 * @param x The x coordinate where the text will be drawn 724 * @param y The y coordinate where the text will be drawn 725 * @param paint The paint to draw the text with 726 */ 727 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 728 729 /** 730 * Draws shadow layer on text (with optional positions). 731 * 732 * @param paint The paint to draw the shadow with 733 * @param text The text to draw 734 * @param bytesCount The number of bytes in the text 735 * @param count The number of glyphs in the text 736 * @param positions The x, y positions of individual glyphs (or NULL) 737 * @param fontRenderer The font renderer object 738 * @param alpha The alpha value for drawing the shadow 739 * @param x The x coordinate where the shadow will be drawn 740 * @param y The y coordinate where the shadow will be drawn 741 */ 742 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 743 const float* positions, FontRenderer& fontRenderer, int alpha, 744 float x, float y); 745 746 /** 747 * Draws a path texture. Path textures are alpha8 bitmaps that need special 748 * compositing to apply colors/filters/etc. 749 * 750 * @param texture The texture to render 751 * @param x The x coordinate where the texture will be drawn 752 * @param y The y coordinate where the texture will be drawn 753 * @param paint The paint to draw the texture with 754 */ 755 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 756 757 /** 758 * Resets the texture coordinates stored in mMeshVertices. Setting the values 759 * back to default is achieved by calling: 760 * 761 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 762 * 763 * @param u1 The left coordinate of the texture 764 * @param v1 The bottom coordinate of the texture 765 * @param u2 The right coordinate of the texture 766 * @param v2 The top coordinate of the texture 767 */ 768 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 769 770 /** 771 * Returns true if the specified paint will draw invisible text. 772 */ 773 bool canSkipText(const SkPaint* paint) const; 774 775 /** 776 * Binds the specified texture. The texture unit must have been selected 777 * prior to calling this method. 778 */ 779 inline void bindTexture(GLuint texture) { 780 mCaches.bindTexture(texture); 781 } 782 783 /** 784 * Binds the specified EGLImage texture. The texture unit must have been selected 785 * prior to calling this method. 786 */ 787 inline void bindExternalTexture(GLuint texture) { 788 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 789 } 790 791 /** 792 * Enable or disable blending as necessary. This function sets the appropriate 793 * blend function based on the specified xfermode. 794 */ 795 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 796 bool swapSrcDst = false); 797 798 /** 799 * Use the specified program with the current GL context. If the program is already 800 * in use, it will not be bound again. If it is not in use, the current program is 801 * marked unused and the specified program becomes used and becomes the new 802 * current program. 803 * 804 * @param program The program to use 805 * 806 * @return true If the specified program was already in use, false otherwise. 807 */ 808 inline bool useProgram(Program* program); 809 810 /** 811 * Invoked before any drawing operation. This sets required state. 812 */ 813 void setupDraw(bool clear = true); 814 815 /** 816 * Various methods to setup OpenGL rendering. 817 */ 818 void setupDrawWithTexture(bool isAlpha8 = false); 819 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 820 void setupDrawWithExternalTexture(); 821 void setupDrawNoTexture(); 822 void setupDrawAA(); 823 void setupDrawColor(int color, int alpha); 824 void setupDrawColor(float r, float g, float b, float a); 825 void setupDrawAlpha8Color(int color, int alpha); 826 void setupDrawTextGamma(const SkPaint* paint); 827 void setupDrawShader(); 828 void setupDrawColorFilter(const SkColorFilter* filter); 829 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 830 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 831 void setupDrawProgram(); 832 void setupDrawDirtyRegionsDisabled(); 833 834 /** 835 * Setup the current program matrices based upon the nature of the geometry. 836 * 837 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 838 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 839 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 840 * transformations are stored in the modelView matrix and uploaded to the shader. 841 * 842 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 843 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 844 * 845 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 846 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 847 * or when simple translation has been extracted) 848 */ 849 void setupDrawModelView(ModelViewMode mode, bool offset, 850 float left, float top, float right, float bottom, bool ignoreTransform = false); 851 void setupDrawColorUniforms(); 852 void setupDrawPureColorUniforms(); 853 void setupDrawShaderUniforms(bool ignoreTransform = false); 854 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 855 void setupDrawSimpleMesh(); 856 void setupDrawTexture(GLuint texture); 857 void setupDrawExternalTexture(GLuint texture); 858 void setupDrawTextureTransform(); 859 void setupDrawTextureTransformUniforms(mat4& transform); 860 void setupDrawTextGammaUniforms(); 861 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 862 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 863 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 864 void setupDrawIndexedVertices(GLvoid* vertices); 865 void accountForClear(SkXfermode::Mode mode); 866 867 bool updateLayer(Layer* layer, bool inFrame); 868 void updateLayers(); 869 void flushLayers(); 870 871#if DEBUG_LAYERS_AS_REGIONS 872 /** 873 * Renders the specified region as a series of rectangles. This method 874 * is used for debugging only. 875 */ 876 void drawRegionRectsDebug(const Region& region); 877#endif 878 879 /** 880 * Renders the specified region as a series of rectangles. The region 881 * must be in screen-space coordinates. 882 */ 883 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 884 885 /** 886 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 887 * is turned on. 888 */ 889 void debugClip(); 890 891 void debugOverdraw(bool enable, bool clear); 892 void renderOverdraw(); 893 void countOverdraw(); 894 895 /** 896 * Should be invoked every time the glScissor is modified. 897 */ 898 inline void dirtyClip() { 899 mDirtyClip = true; 900 } 901 902 inline const UvMapper& getMapper(const Texture* texture) { 903 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 904 } 905 906 /** 907 * Returns a texture object for the specified bitmap. The texture can 908 * come from the texture cache or an atlas. If this method returns 909 * NULL, the texture could not be found and/or allocated. 910 */ 911 Texture* getTexture(const SkBitmap* bitmap); 912 913 // Matrix used for view/projection in shaders 914 mat4 mViewProjMatrix; 915 916 /** 917 * Model-view matrix used to position/size objects 918 * 919 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 920 * currentTransform(). 921 * 922 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 923 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 924 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 925 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 926 * bitmap. 927 * 928 * Used as input to SkiaShader transformation. 929 */ 930 mat4 mModelView; 931 932 // State used to define the clipping region 933 Rect mTilingClip; 934 // Is the target render surface opaque 935 bool mOpaque; 936 // Is a frame currently being rendered 937 bool mFrameStarted; 938 939 // Used to draw textured quads 940 TextureVertex mMeshVertices[4]; 941 942 // Default UV mapper 943 const UvMapper mUvMapper; 944 945 // shader, filters, and shadow 946 DrawModifiers mDrawModifiers; 947 SkPaint mFilteredPaint; 948 949 // Various caches 950 Caches& mCaches; 951 Extensions& mExtensions; 952 953 // List of rectangles to clear after saveLayer() is invoked 954 Vector<Rect*> mLayers; 955 // List of functors to invoke after a frame is drawn 956 SortedVector<Functor*> mFunctors; 957 // List of layers to update at the beginning of a frame 958 Vector<Layer*> mLayerUpdates; 959 960 // The following fields are used to setup drawing 961 // Used to describe the shaders to generate 962 ProgramDescription mDescription; 963 // Color description 964 bool mColorSet; 965 float mColorA, mColorR, mColorG, mColorB; 966 // Indicates that the shader should get a color 967 bool mSetShaderColor; 968 // Current texture unit 969 GLuint mTextureUnit; 970 // Track dirty regions, true by default 971 bool mTrackDirtyRegions; 972 // Indicate whether we are drawing an opaque frame 973 bool mOpaqueFrame; 974 975 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 976 // Properties.h 977 bool mScissorOptimizationDisabled; 978 979 // No-ops start/endTiling when set 980 bool mSuppressTiling; 981 982 // If true, this renderer will setup drawing to emulate 983 // an increment stencil buffer in the color buffer 984 bool mCountOverdraw; 985 float mOverdraw; 986 987 friend class DisplayListRenderer; 988 friend class Layer; 989 friend class TextSetupFunctor; 990 friend class DrawBitmapOp; 991 friend class DrawPatchOp; 992 993}; // class OpenGLRenderer 994 995}; // namespace uirenderer 996}; // namespace android 997 998#endif // ANDROID_HWUI_OPENGL_RENDERER_H 999