OpenGLRenderer.h revision 76d3a1b8d035d27bc80b0f2fc480a903bd001514
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 DisplayList; 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}; 119 120/////////////////////////////////////////////////////////////////////////////// 121// Renderer 122/////////////////////////////////////////////////////////////////////////////// 123/** 124 * OpenGL Renderer implementation. 125 */ 126class OpenGLRenderer : public StatefulBaseRenderer { 127public: 128 ANDROID_API OpenGLRenderer(); 129 virtual ~OpenGLRenderer(); 130 131 ANDROID_API void initProperties(); 132 133 virtual void setViewport(int width, int height); 134 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 135 virtual void finish(); 136 virtual void interrupt(); 137 virtual void resume(); 138 139 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 140 mCountOverdraw = enabled; 141 } 142 143 ANDROID_API float getOverdraw() { 144 return mCountOverdraw ? mOverdraw : 0.0f; 145 } 146 147 ANDROID_API status_t invokeFunctors(Rect& dirty); 148 ANDROID_API void detachFunctor(Functor* functor); 149 ANDROID_API void attachFunctor(Functor* functor); 150 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 151 152 ANDROID_API void pushLayerUpdate(Layer* layer); 153 ANDROID_API void cancelLayerUpdate(Layer* layer); 154 ANDROID_API void clearLayerUpdates(); 155 ANDROID_API void flushLayerUpdates(); 156 157 ANDROID_API virtual int saveLayer(float left, float top, float right, float bottom, 158 const SkPaint* paint, int flags); 159 160 int saveLayerDeferred(float left, float top, float right, float bottom, 161 const SkPaint* paint, int flags); 162 163 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t replayFlags = 1); 164 virtual status_t drawLayer(Layer* layer, float x, float y); 165 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 166 const SkPaint* paint); 167 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 168 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 169 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 170 const SkPaint* paint); 171 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 172 float srcRight, float srcBottom, float dstLeft, float dstTop, 173 float dstRight, float dstBottom, const SkPaint* paint); 174 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 175 const SkPaint* paint); 176 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 177 const float* vertices, const int* colors, const SkPaint* paint); 178 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 179 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 180 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 181 float left, float top, float right, float bottom, const SkPaint* paint); 182 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 183 float left, float top, float right, float bottom, const SkPaint* paint); 184 virtual status_t drawColor(int color, SkXfermode::Mode mode); 185 virtual status_t drawRect(float left, float top, float right, float bottom, 186 const SkPaint* paint); 187 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 188 float rx, float ry, const SkPaint* paint); 189 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 190 virtual status_t drawOval(float left, float top, float right, float bottom, 191 const SkPaint* paint); 192 virtual status_t drawArc(float left, float top, float right, float bottom, 193 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 194 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 195 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 196 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 197 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 198 float hOffset, float vOffset, const SkPaint* paint); 199 virtual status_t drawPosText(const char* text, int bytesCount, int count, 200 const float* positions, const SkPaint* paint); 201 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 202 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 203 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 204 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 205 206 status_t drawShadow(const mat4& casterTransform, float casterAlpha, 207 const SkPath* casterOutline); 208 209 virtual void resetShader(); 210 virtual void setupShader(SkiaShader* shader); 211 212 virtual void resetShadow(); 213 virtual void setupShadow(float radius, float dx, float dy, int color); 214 215 virtual void resetPaintFilter(); 216 virtual void setupPaintFilter(int clearBits, int setBits); 217 218 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 219 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 220 221 const SkPaint* filterPaint(const SkPaint* paint); 222 223 /** 224 * Store the current display state (most importantly, the current clip and transform), and 225 * additionally map the state's bounds from local to window coordinates. 226 * 227 * Returns true if quick-rejected 228 */ 229 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 230 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 231 void setupMergedMultiDraw(const Rect* clipRect); 232 233 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 234 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 235 236 ANDROID_API bool isCurrentTransformSimple() { 237 return currentTransform()->isSimple(); 238 } 239 240 Caches& getCaches() { 241 return mCaches; 242 } 243 244 // simple rect clip 245 bool isCurrentClipSimple() { 246 return mSnapshot->clipRegion->isEmpty(); 247 } 248 249 int getViewportWidth() { return currentSnapshot()->viewport.getWidth(); } 250 int getViewportHeight() { return currentSnapshot()->viewport.getHeight(); } 251 252 /** 253 * Scales the alpha on the current snapshot. This alpha value will be modulated 254 * with other alpha values when drawing primitives. 255 */ 256 void scaleAlpha(float alpha) { 257 mSnapshot->alpha *= alpha; 258 } 259 260 /** 261 * Inserts a named event marker in the stream of GL commands. 262 */ 263 void eventMark(const char* name) const; 264 265 /** 266 * Inserts a named group marker in the stream of GL commands. This marker 267 * can be used by tools to group commands into logical groups. A call to 268 * this method must always be followed later on by a call to endMark(). 269 */ 270 void startMark(const char* name) const; 271 272 /** 273 * Closes the last group marker opened by startMark(). 274 */ 275 void endMark() const; 276 277 /** 278 * Gets the alpha and xfermode out of a paint object. If the paint is null 279 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 280 * not multiply the paint's alpha by the current snapshot's alpha, and does 281 * not replace the alpha with the overrideLayerAlpha 282 * 283 * @param paint The paint to extract values from 284 * @param alpha Where to store the resulting alpha 285 * @param mode Where to store the resulting xfermode 286 */ 287 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 288 *mode = getXfermodeDirect(paint); 289 *alpha = getAlphaDirect(paint); 290 } 291 292 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 293 if (!paint) return SkXfermode::kSrcOver_Mode; 294 return getXfermode(paint->getXfermode()); 295 } 296 297 static inline int getAlphaDirect(const SkPaint* paint) { 298 if (!paint) return 255; 299 return paint->getAlpha(); 300 } 301 302 /** 303 * Return the best transform to use to rasterize text given a full 304 * transform matrix. 305 */ 306 mat4 findBestFontTransform(const mat4& transform) const; 307 308#if DEBUG_MERGE_BEHAVIOR 309 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 310 mCaches.setScissorEnabled(false); 311 312 // should only be called outside of other draw ops, so stencil can only be in test state 313 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 314 mCaches.stencil.disable(); 315 316 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 317 318 if (stencilWasEnabled) mCaches.stencil.enableTest(); 319 } 320#endif 321 322protected: 323 /** 324 * Computes the projection matrix, initialize the first snapshot 325 * and stores the dimensions of the render target. 326 */ 327 void initViewport(int width, int height); 328 329 /** 330 * Perform the setup specific to a frame. This method does not 331 * issue any OpenGL commands. 332 */ 333 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 334 335 /** 336 * Indicates the start of rendering. This method will setup the 337 * initial OpenGL state (viewport, clearing the buffer, etc.) 338 */ 339 status_t startFrame(); 340 341 /** 342 * Clears the underlying surface if needed. 343 */ 344 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 345 346 /** 347 * Call this method after updating a layer during a drawing pass. 348 */ 349 void resumeAfterLayer(); 350 351 /** 352 * This method is called whenever a stencil buffer is required. Subclasses 353 * should override this method and call attachStencilBufferToLayer() on the 354 * appropriate layer(s). 355 */ 356 virtual void ensureStencilBuffer(); 357 358 /** 359 * Obtains a stencil render buffer (allocating it if necessary) and 360 * attaches it to the specified layer. 361 */ 362 void attachStencilBufferToLayer(Layer* layer); 363 364 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 365 const SkPaint* paint = NULL); 366 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 367 return quickRejectSetupScissor(bounds.left, bounds.top, 368 bounds.right, bounds.bottom, paint); 369 } 370 371 /** 372 * Compose the layer defined in the current snapshot with the layer 373 * defined by the previous snapshot. 374 * 375 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 376 * 377 * @param curent The current snapshot containing the layer to compose 378 * @param previous The previous snapshot to compose the current layer with 379 */ 380 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 381 382 /** 383 * Marks the specified region as dirty at the specified bounds. 384 */ 385 void dirtyLayerUnchecked(Rect& bounds, Region* region); 386 387 /** 388 * Returns the region of the current layer. 389 */ 390 virtual Region* getRegion() const { 391 return mSnapshot->region; 392 } 393 394 /** 395 * Indicates whether rendering is currently targeted at a layer. 396 */ 397 virtual bool hasLayer() const { 398 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 399 } 400 401 /** 402 * Returns the name of the FBO this renderer is rendering into. 403 */ 404 virtual GLuint getTargetFbo() const { 405 return 0; 406 } 407 408 /** 409 * Renders the specified layer as a textured quad. 410 * 411 * @param layer The layer to render 412 * @param rect The bounds of the layer 413 */ 414 void drawTextureLayer(Layer* layer, const Rect& rect); 415 416 /** 417 * Gets the alpha and xfermode out of a paint object. If the paint is null 418 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 419 * snapshot alpha, and overrideLayerAlpha 420 * 421 * @param paint The paint to extract values from 422 * @param alpha Where to store the resulting alpha 423 * @param mode Where to store the resulting xfermode 424 */ 425 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 426 427 /** 428 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 429 * 430 * @param layer The layer from which the alpha is extracted 431 */ 432 inline float getLayerAlpha(const Layer* layer) const; 433 434 /** 435 * Safely retrieves the ColorFilter from the given Paint. If the paint is 436 * null then null is returned. 437 */ 438 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 439 return paint ? paint->getColorFilter() : NULL; 440 } 441 442 /** 443 * Set to true to suppress error checks at the end of a frame. 444 */ 445 virtual bool suppressErrorChecks() const { 446 return false; 447 } 448 449private: 450 /** 451 * Discards the content of the framebuffer if supported by the driver. 452 * This method should be called at the beginning of a frame to optimize 453 * rendering on some tiler architectures. 454 */ 455 void discardFramebuffer(float left, float top, float right, float bottom); 456 457 /** 458 * Ensures the state of the renderer is the same as the state of 459 * the GL context. 460 */ 461 void syncState(); 462 463 /** 464 * Tells the GPU what part of the screen is about to be redrawn. 465 * This method will use the current layer space clip rect. 466 * This method needs to be invoked every time getTargetFbo() is 467 * bound again. 468 */ 469 void startTilingCurrentClip(bool opaque = false); 470 471 /** 472 * Tells the GPU what part of the screen is about to be redrawn. 473 * This method needs to be invoked every time getTargetFbo() is 474 * bound again. 475 */ 476 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 477 478 /** 479 * Tells the GPU that we are done drawing the frame or that we 480 * are switching to another render target. 481 */ 482 void endTiling(); 483 484 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 485 486 /** 487 * Sets the clipping rectangle using glScissor. The clip is defined by 488 * the current snapshot's clipRect member. 489 */ 490 void setScissorFromClip(); 491 492 /** 493 * Sets the clipping region using the stencil buffer. The clip region 494 * is defined by the current snapshot's clipRegion member. 495 */ 496 void setStencilFromClip(); 497 498 /** 499 * Given the local bounds of the layer, calculates ... 500 */ 501 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 502 503 /** 504 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 505 */ 506 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 507 bool fboLayer, int alpha); 508 509 /** 510 * Creates a new layer stored in the specified snapshot. 511 * 512 * @param snapshot The snapshot associated with the new layer 513 * @param left The left coordinate of the layer 514 * @param top The top coordinate of the layer 515 * @param right The right coordinate of the layer 516 * @param bottom The bottom coordinate of the layer 517 * @param alpha The translucency of the layer 518 * @param mode The blending mode of the layer 519 * @param flags The layer save flags 520 * 521 * @return True if the layer was successfully created, false otherwise 522 */ 523 bool createLayer(float left, float top, float right, float bottom, 524 const SkPaint* paint, int flags); 525 526 /** 527 * Creates a new layer stored in the specified snapshot as an FBO. 528 * 529 * @param layer The layer to store as an FBO 530 * @param snapshot The snapshot associated with the new layer 531 * @param bounds The bounds of the layer 532 */ 533 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 534 535 /** 536 * Compose the specified layer as a region. 537 * 538 * @param layer The layer to compose 539 * @param rect The layer's bounds 540 */ 541 void composeLayerRegion(Layer* layer, const Rect& rect); 542 543 /** 544 * Compose the specified layer as a simple rectangle. 545 * 546 * @param layer The layer to compose 547 * @param rect The layer's bounds 548 * @param swap If true, the source and destination are swapped 549 */ 550 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 551 552 /** 553 * Clears all the regions corresponding to the current list of layers. 554 * This method MUST be invoked before any drawing operation. 555 */ 556 void clearLayerRegions(); 557 558 /** 559 * Mark the layer as dirty at the specified coordinates. The coordinates 560 * are transformed with the supplied matrix. 561 */ 562 void dirtyLayer(const float left, const float top, 563 const float right, const float bottom, const mat4 transform); 564 565 /** 566 * Mark the layer as dirty at the specified coordinates. 567 */ 568 void dirtyLayer(const float left, const float top, 569 const float right, const float bottom); 570 571 /** 572 * Draws a colored rectangle with the specified color. The specified coordinates 573 * are transformed by the current snapshot's transform matrix unless specified 574 * otherwise. 575 * 576 * @param left The left coordinate of the rectangle 577 * @param top The top coordinate of the rectangle 578 * @param right The right coordinate of the rectangle 579 * @param bottom The bottom coordinate of the rectangle 580 * @param paint The paint containing the color, blending mode, etc. 581 * @param ignoreTransform True if the current transform should be ignored 582 */ 583 void drawColorRect(float left, float top, float right, float bottom, 584 const SkPaint* paint, bool ignoreTransform = false); 585 586 /** 587 * Draws a series of colored rectangles with the specified color. The specified 588 * coordinates are transformed by the current snapshot's transform matrix unless 589 * specified otherwise. 590 * 591 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 592 * per rectangle 593 * @param paint The paint containing the color, blending mode, etc. 594 * @param ignoreTransform True if the current transform should be ignored 595 * @param dirty True if calling this method should dirty the current layer 596 * @param clip True if the rects should be clipped, false otherwise 597 */ 598 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 599 bool ignoreTransform = false, bool dirty = true, bool clip = true); 600 601 /** 602 * Draws the shape represented by the specified path texture. 603 * This method invokes drawPathTexture() but takes into account 604 * the extra left/top offset and the texture offset to correctly 605 * position the final shape. 606 * 607 * @param left The left coordinate of the shape to render 608 * @param top The top coordinate of the shape to render 609 * @param texture The texture reprsenting the shape 610 * @param paint The paint to draw the shape with 611 */ 612 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 613 614 /** 615 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 616 * different compositing rules. 617 * 618 * @param texture The texture to draw with 619 * @param left The x coordinate of the bitmap 620 * @param top The y coordinate of the bitmap 621 * @param paint The paint to render with 622 */ 623 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 624 625 /** 626 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 627 * 628 * @param vertexBuffer The VertexBuffer to be drawn 629 * @param paint The paint to render with 630 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 631 */ 632 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, const SkPaint* paint, 633 bool useOffset = false); 634 635 /** 636 * Renders the convex hull defined by the specified path as a strip of polygons. 637 * 638 * @param path The hull of the path to draw 639 * @param paint The paint to render with 640 */ 641 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 642 643 /** 644 * Draws a textured rectangle with the specified texture. The specified coordinates 645 * are transformed by the current snapshot's transform matrix. 646 * 647 * @param left The left coordinate of the rectangle 648 * @param top The top coordinate of the rectangle 649 * @param right The right coordinate of the rectangle 650 * @param bottom The bottom coordinate of the rectangle 651 * @param texture The texture to use 652 * @param paint The paint containing the alpha, blending mode, etc. 653 */ 654 void drawTextureRect(float left, float top, float right, float bottom, 655 Texture* texture, const SkPaint* paint); 656 657 /** 658 * Draws a textured mesh with the specified texture. If the indices are omitted, 659 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 660 * VBO is bound. 661 * 662 * @param left The left coordinate of the rectangle 663 * @param top The top coordinate of the rectangle 664 * @param right The right coordinate of the rectangle 665 * @param bottom The bottom coordinate of the rectangle 666 * @param texture The texture name to map onto the rectangle 667 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 668 * @param blend True if the texture contains an alpha channel 669 * @param vertices The vertices that define the mesh 670 * @param texCoords The texture coordinates of each vertex 671 * @param elementsCount The number of elements in the mesh, required by indices 672 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 673 * @param ignoreTransform True if the current transform should be ignored 674 * @param vbo The VBO used to draw the mesh 675 * @param modelViewMode Defines whether the model view matrix should be scaled 676 * @param dirty True if calling this method should dirty the current layer 677 */ 678 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 679 const SkPaint* paint, bool blend, 680 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 681 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 682 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 683 684 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 685 const SkPaint* paint, bool blend, 686 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 687 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 688 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 689 690 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 691 GLuint texture, const SkPaint* paint, 692 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 693 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 694 bool dirty = true); 695 696 /** 697 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 698 * If the number of vertices to draw exceeds the number of indices we have 699 * pre-allocated, this method will generate several glDrawElements() calls. 700 */ 701 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 702 703 /** 704 * Draws text underline and strike-through if needed. 705 * 706 * @param text The text to decor 707 * @param bytesCount The number of bytes in the text 708 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 709 * @param x The x coordinate where the text will be drawn 710 * @param y The y coordinate where the text will be drawn 711 * @param paint The paint to draw the text with 712 */ 713 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 714 715 /** 716 * Draws shadow layer on text (with optional positions). 717 * 718 * @param paint The paint to draw the shadow with 719 * @param text The text to draw 720 * @param bytesCount The number of bytes in the text 721 * @param count The number of glyphs in the text 722 * @param positions The x, y positions of individual glyphs (or NULL) 723 * @param fontRenderer The font renderer object 724 * @param alpha The alpha value for drawing the shadow 725 * @param x The x coordinate where the shadow will be drawn 726 * @param y The y coordinate where the shadow will be drawn 727 */ 728 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 729 const float* positions, FontRenderer& fontRenderer, int alpha, 730 float x, float y); 731 732 /** 733 * Draws a path texture. Path textures are alpha8 bitmaps that need special 734 * compositing to apply colors/filters/etc. 735 * 736 * @param texture The texture to render 737 * @param x The x coordinate where the texture will be drawn 738 * @param y The y coordinate where the texture will be drawn 739 * @param paint The paint to draw the texture with 740 */ 741 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 742 743 /** 744 * Resets the texture coordinates stored in mMeshVertices. Setting the values 745 * back to default is achieved by calling: 746 * 747 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 748 * 749 * @param u1 The left coordinate of the texture 750 * @param v1 The bottom coordinate of the texture 751 * @param u2 The right coordinate of the texture 752 * @param v2 The top coordinate of the texture 753 */ 754 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 755 756 /** 757 * Returns true if the specified paint will draw invisible text. 758 */ 759 bool canSkipText(const SkPaint* paint) const; 760 761 /** 762 * Binds the specified texture. The texture unit must have been selected 763 * prior to calling this method. 764 */ 765 inline void bindTexture(GLuint texture) { 766 mCaches.bindTexture(texture); 767 } 768 769 /** 770 * Binds the specified EGLImage texture. The texture unit must have been selected 771 * prior to calling this method. 772 */ 773 inline void bindExternalTexture(GLuint texture) { 774 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 775 } 776 777 /** 778 * Enable or disable blending as necessary. This function sets the appropriate 779 * blend function based on the specified xfermode. 780 */ 781 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 782 bool swapSrcDst = false); 783 784 /** 785 * Use the specified program with the current GL context. If the program is already 786 * in use, it will not be bound again. If it is not in use, the current program is 787 * marked unused and the specified program becomes used and becomes the new 788 * current program. 789 * 790 * @param program The program to use 791 * 792 * @return true If the specified program was already in use, false otherwise. 793 */ 794 inline bool useProgram(Program* program); 795 796 /** 797 * Invoked before any drawing operation. This sets required state. 798 */ 799 void setupDraw(bool clear = true); 800 801 /** 802 * Various methods to setup OpenGL rendering. 803 */ 804 void setupDrawWithTexture(bool isAlpha8 = false); 805 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 806 void setupDrawWithExternalTexture(); 807 void setupDrawNoTexture(); 808 void setupDrawAA(); 809 void setupDrawColor(int color, int alpha); 810 void setupDrawColor(float r, float g, float b, float a); 811 void setupDrawAlpha8Color(int color, int alpha); 812 void setupDrawTextGamma(const SkPaint* paint); 813 void setupDrawShader(); 814 void setupDrawColorFilter(const SkColorFilter* filter); 815 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 816 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 817 void setupDrawProgram(); 818 void setupDrawDirtyRegionsDisabled(); 819 820 /** 821 * Setup the current program matrices based upon the nature of the geometry. 822 * 823 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 824 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 825 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 826 * transformations are stored in the modelView matrix and uploaded to the shader. 827 * 828 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 829 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 830 * 831 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 832 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 833 * or when simple translation has been extracted) 834 */ 835 void setupDrawModelView(ModelViewMode mode, bool offset, 836 float left, float top, float right, float bottom, bool ignoreTransform = false); 837 void setupDrawColorUniforms(); 838 void setupDrawPureColorUniforms(); 839 void setupDrawShaderUniforms(bool ignoreTransform = false); 840 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 841 void setupDrawSimpleMesh(); 842 void setupDrawTexture(GLuint texture); 843 void setupDrawExternalTexture(GLuint texture); 844 void setupDrawTextureTransform(); 845 void setupDrawTextureTransformUniforms(mat4& transform); 846 void setupDrawTextGammaUniforms(); 847 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 848 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 849 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 850 void setupDrawIndexedVertices(GLvoid* vertices); 851 void accountForClear(SkXfermode::Mode mode); 852 853 bool updateLayer(Layer* layer, bool inFrame); 854 void updateLayers(); 855 void flushLayers(); 856 857#if DEBUG_LAYERS_AS_REGIONS 858 /** 859 * Renders the specified region as a series of rectangles. This method 860 * is used for debugging only. 861 */ 862 void drawRegionRectsDebug(const Region& region); 863#endif 864 865 /** 866 * Renders the specified region as a series of rectangles. The region 867 * must be in screen-space coordinates. 868 */ 869 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 870 871 /** 872 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 873 * is turned on. 874 */ 875 void debugClip(); 876 877 void debugOverdraw(bool enable, bool clear); 878 void renderOverdraw(); 879 void countOverdraw(); 880 881 /** 882 * Should be invoked every time the glScissor is modified. 883 */ 884 inline void dirtyClip() { 885 mDirtyClip = true; 886 } 887 888 inline const UvMapper& getMapper(const Texture* texture) { 889 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 890 } 891 892 /** 893 * Returns a texture object for the specified bitmap. The texture can 894 * come from the texture cache or an atlas. If this method returns 895 * NULL, the texture could not be found and/or allocated. 896 */ 897 Texture* getTexture(const SkBitmap* bitmap); 898 899 // Matrix used for view/projection in shaders 900 mat4 mViewProjMatrix; 901 902 /** 903 * Model-view matrix used to position/size objects 904 * 905 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 906 * currentTransform(). 907 * 908 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 909 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 910 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 911 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 912 * bitmap. 913 * 914 * Used as input to SkiaShader transformation. 915 */ 916 mat4 mModelView; 917 918 // State used to define the clipping region 919 Rect mTilingClip; 920 // Is the target render surface opaque 921 bool mOpaque; 922 // Is a frame currently being rendered 923 bool mFrameStarted; 924 925 // Used to draw textured quads 926 TextureVertex mMeshVertices[4]; 927 928 // Default UV mapper 929 const UvMapper mUvMapper; 930 931 // shader, filters, and shadow 932 DrawModifiers mDrawModifiers; 933 SkPaint mFilteredPaint; 934 935 // Various caches 936 Caches& mCaches; 937 Extensions& mExtensions; 938 939 // List of rectangles to clear after saveLayer() is invoked 940 Vector<Rect*> mLayers; 941 // List of functors to invoke after a frame is drawn 942 SortedVector<Functor*> mFunctors; 943 // List of layers to update at the beginning of a frame 944 Vector<Layer*> mLayerUpdates; 945 946 // The following fields are used to setup drawing 947 // Used to describe the shaders to generate 948 ProgramDescription mDescription; 949 // Color description 950 bool mColorSet; 951 float mColorA, mColorR, mColorG, mColorB; 952 // Indicates that the shader should get a color 953 bool mSetShaderColor; 954 // Current texture unit 955 GLuint mTextureUnit; 956 // Track dirty regions, true by default 957 bool mTrackDirtyRegions; 958 // Indicate whether we are drawing an opaque frame 959 bool mOpaqueFrame; 960 961 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 962 // Properties.h 963 bool mScissorOptimizationDisabled; 964 965 // No-ops start/endTiling when set 966 bool mSuppressTiling; 967 968 // If true, this renderer will setup drawing to emulate 969 // an increment stencil buffer in the color buffer 970 bool mCountOverdraw; 971 float mOverdraw; 972 973 friend class DisplayListRenderer; 974 friend class Layer; 975 friend class TextSetupFunctor; 976 friend class DrawBitmapOp; 977 friend class DrawPatchOp; 978 979}; // class OpenGLRenderer 980 981}; // namespace uirenderer 982}; // namespace android 983 984#endif // ANDROID_HWUI_OPENGL_RENDERER_H 985