OpenGLRenderer.h revision e18264b079481a244b30e3f71012c53bbd861f92
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_Shadow = 1 123}; 124 125/////////////////////////////////////////////////////////////////////////////// 126// Renderer 127/////////////////////////////////////////////////////////////////////////////// 128/** 129 * OpenGL Renderer implementation. 130 */ 131class OpenGLRenderer : public StatefulBaseRenderer { 132public: 133 ANDROID_API OpenGLRenderer(); 134 virtual ~OpenGLRenderer(); 135 136 ANDROID_API void initProperties(); 137 138 virtual void setViewport(int width, int height); 139 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 140 virtual void finish(); 141 virtual void interrupt(); 142 virtual void resume(); 143 144 ANDROID_API void setCountOverdrawEnabled(bool enabled) { 145 mCountOverdraw = enabled; 146 } 147 148 ANDROID_API float getOverdraw() { 149 return mCountOverdraw ? mOverdraw : 0.0f; 150 } 151 152 ANDROID_API status_t invokeFunctors(Rect& dirty); 153 ANDROID_API void detachFunctor(Functor* functor); 154 ANDROID_API void attachFunctor(Functor* functor); 155 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 156 157 ANDROID_API void pushLayerUpdate(Layer* layer); 158 ANDROID_API void cancelLayerUpdate(Layer* layer); 159 ANDROID_API void clearLayerUpdates(); 160 ANDROID_API void flushLayerUpdates(); 161 162 ANDROID_API virtual int saveLayer(float left, float top, float right, float bottom, 163 const SkPaint* paint, int flags); 164 165 int saveLayerDeferred(float left, float top, float right, float bottom, 166 const SkPaint* paint, int flags); 167 168 virtual status_t drawDisplayList(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 169 virtual status_t drawLayer(Layer* layer, float x, float y); 170 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 171 const SkPaint* paint); 172 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 173 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 174 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 175 const SkPaint* paint); 176 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 177 float srcRight, float srcBottom, float dstLeft, float dstTop, 178 float dstRight, float dstBottom, const SkPaint* paint); 179 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 180 const SkPaint* paint); 181 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 182 const float* vertices, const int* colors, const SkPaint* paint); 183 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 184 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 185 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 186 float left, float top, float right, float bottom, const SkPaint* paint); 187 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 188 float left, float top, float right, float bottom, const SkPaint* paint); 189 virtual status_t drawColor(int color, SkXfermode::Mode mode); 190 virtual status_t drawRect(float left, float top, float right, float bottom, 191 const SkPaint* paint); 192 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 193 float rx, float ry, const SkPaint* paint); 194 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 195 virtual status_t drawOval(float left, float top, float right, float bottom, 196 const SkPaint* paint); 197 virtual status_t drawArc(float left, float top, float right, float bottom, 198 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 199 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 200 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 201 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 202 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 203 float hOffset, float vOffset, const SkPaint* paint); 204 virtual status_t drawPosText(const char* text, int bytesCount, int count, 205 const float* positions, const SkPaint* paint); 206 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 207 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 208 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 209 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 210 211 status_t drawShadow(const mat4& casterTransformXY, const mat4& casterTransformZ, 212 float casterAlpha, const SkPath* casterOutline); 213 214 virtual void resetShader(); 215 virtual void setupShader(SkiaShader* shader); 216 217 virtual void resetShadow(); 218 virtual void setupShadow(float radius, float dx, float dy, int color); 219 220 virtual void resetPaintFilter(); 221 virtual void setupPaintFilter(int clearBits, int setBits); 222 223 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 224 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 225 226 const SkPaint* filterPaint(const SkPaint* paint); 227 228 /** 229 * Store the current display state (most importantly, the current clip and transform), and 230 * additionally map the state's bounds from local to window coordinates. 231 * 232 * Returns true if quick-rejected 233 */ 234 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 235 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 236 void setupMergedMultiDraw(const Rect* clipRect); 237 238 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 239 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 240 241 ANDROID_API bool isCurrentTransformSimple() { 242 return currentTransform()->isSimple(); 243 } 244 245 Caches& getCaches() { 246 return mCaches; 247 } 248 249 // simple rect clip 250 bool isCurrentClipSimple() { 251 return mSnapshot->clipRegion->isEmpty(); 252 } 253 254 int getViewportWidth() { return currentSnapshot()->viewport.getWidth(); } 255 int getViewportHeight() { return currentSnapshot()->viewport.getHeight(); } 256 257 /** 258 * Scales the alpha on the current snapshot. This alpha value will be modulated 259 * with other alpha values when drawing primitives. 260 */ 261 void scaleAlpha(float alpha) { 262 mSnapshot->alpha *= alpha; 263 } 264 265 /** 266 * Inserts a named event marker in the stream of GL commands. 267 */ 268 void eventMark(const char* name) const; 269 270 /** 271 * Inserts a named group marker in the stream of GL commands. This marker 272 * can be used by tools to group commands into logical groups. A call to 273 * this method must always be followed later on by a call to endMark(). 274 */ 275 void startMark(const char* name) const; 276 277 /** 278 * Closes the last group marker opened by startMark(). 279 */ 280 void endMark() const; 281 282 /** 283 * Gets the alpha and xfermode out of a paint object. If the paint is null 284 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 285 * not multiply the paint's alpha by the current snapshot's alpha, and does 286 * not replace the alpha with the overrideLayerAlpha 287 * 288 * @param paint The paint to extract values from 289 * @param alpha Where to store the resulting alpha 290 * @param mode Where to store the resulting xfermode 291 */ 292 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 293 *mode = getXfermodeDirect(paint); 294 *alpha = getAlphaDirect(paint); 295 } 296 297 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 298 if (!paint) return SkXfermode::kSrcOver_Mode; 299 return getXfermode(paint->getXfermode()); 300 } 301 302 static inline int getAlphaDirect(const SkPaint* paint) { 303 if (!paint) return 255; 304 return paint->getAlpha(); 305 } 306 307 /** 308 * Return the best transform to use to rasterize text given a full 309 * transform matrix. 310 */ 311 mat4 findBestFontTransform(const mat4& transform) const; 312 313#if DEBUG_MERGE_BEHAVIOR 314 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 315 mCaches.setScissorEnabled(false); 316 317 // should only be called outside of other draw ops, so stencil can only be in test state 318 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 319 mCaches.stencil.disable(); 320 321 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 322 323 if (stencilWasEnabled) mCaches.stencil.enableTest(); 324 } 325#endif 326 327protected: 328 /** 329 * Computes the projection matrix, initialize the first snapshot 330 * and stores the dimensions of the render target. 331 */ 332 void initViewport(int width, int height); 333 334 /** 335 * Perform the setup specific to a frame. This method does not 336 * issue any OpenGL commands. 337 */ 338 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 339 340 /** 341 * Indicates the start of rendering. This method will setup the 342 * initial OpenGL state (viewport, clearing the buffer, etc.) 343 */ 344 status_t startFrame(); 345 346 /** 347 * Clears the underlying surface if needed. 348 */ 349 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 350 351 /** 352 * Call this method after updating a layer during a drawing pass. 353 */ 354 void resumeAfterLayer(); 355 356 /** 357 * This method is called whenever a stencil buffer is required. Subclasses 358 * should override this method and call attachStencilBufferToLayer() on the 359 * appropriate layer(s). 360 */ 361 virtual void ensureStencilBuffer(); 362 363 /** 364 * Obtains a stencil render buffer (allocating it if necessary) and 365 * attaches it to the specified layer. 366 */ 367 void attachStencilBufferToLayer(Layer* layer); 368 369 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 370 const SkPaint* paint = NULL); 371 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 372 return quickRejectSetupScissor(bounds.left, bounds.top, 373 bounds.right, bounds.bottom, paint); 374 } 375 376 /** 377 * Compose the layer defined in the current snapshot with the layer 378 * defined by the previous snapshot. 379 * 380 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 381 * 382 * @param curent The current snapshot containing the layer to compose 383 * @param previous The previous snapshot to compose the current layer with 384 */ 385 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 386 387 /** 388 * Marks the specified region as dirty at the specified bounds. 389 */ 390 void dirtyLayerUnchecked(Rect& bounds, Region* region); 391 392 /** 393 * Returns the region of the current layer. 394 */ 395 virtual Region* getRegion() const { 396 return mSnapshot->region; 397 } 398 399 /** 400 * Indicates whether rendering is currently targeted at a layer. 401 */ 402 virtual bool hasLayer() const { 403 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 404 } 405 406 /** 407 * Returns the name of the FBO this renderer is rendering into. 408 */ 409 virtual GLuint getTargetFbo() const { 410 return 0; 411 } 412 413 /** 414 * Renders the specified layer as a textured quad. 415 * 416 * @param layer The layer to render 417 * @param rect The bounds of the layer 418 */ 419 void drawTextureLayer(Layer* layer, const Rect& rect); 420 421 /** 422 * Gets the alpha and xfermode out of a paint object. If the paint is null 423 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 424 * snapshot alpha, and overrideLayerAlpha 425 * 426 * @param paint The paint to extract values from 427 * @param alpha Where to store the resulting alpha 428 * @param mode Where to store the resulting xfermode 429 */ 430 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 431 432 /** 433 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 434 * 435 * @param layer The layer from which the alpha is extracted 436 */ 437 inline float getLayerAlpha(const Layer* layer) const; 438 439 /** 440 * Safely retrieves the ColorFilter from the given Paint. If the paint is 441 * null then null is returned. 442 */ 443 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 444 return paint ? paint->getColorFilter() : NULL; 445 } 446 447 /** 448 * Set to true to suppress error checks at the end of a frame. 449 */ 450 virtual bool suppressErrorChecks() const { 451 return false; 452 } 453 454private: 455 /** 456 * Discards the content of the framebuffer if supported by the driver. 457 * This method should be called at the beginning of a frame to optimize 458 * rendering on some tiler architectures. 459 */ 460 void discardFramebuffer(float left, float top, float right, float bottom); 461 462 /** 463 * Ensures the state of the renderer is the same as the state of 464 * the GL context. 465 */ 466 void syncState(); 467 468 /** 469 * Tells the GPU what part of the screen is about to be redrawn. 470 * This method will use the current layer space clip rect. 471 * This method needs to be invoked every time getTargetFbo() is 472 * bound again. 473 */ 474 void startTilingCurrentClip(bool opaque = false); 475 476 /** 477 * Tells the GPU what part of the screen is about to be redrawn. 478 * This method needs to be invoked every time getTargetFbo() is 479 * bound again. 480 */ 481 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 482 483 /** 484 * Tells the GPU that we are done drawing the frame or that we 485 * are switching to another render target. 486 */ 487 void endTiling(); 488 489 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 490 491 /** 492 * Sets the clipping rectangle using glScissor. The clip is defined by 493 * the current snapshot's clipRect member. 494 */ 495 void setScissorFromClip(); 496 497 /** 498 * Sets the clipping region using the stencil buffer. The clip region 499 * is defined by the current snapshot's clipRegion member. 500 */ 501 void setStencilFromClip(); 502 503 /** 504 * Given the local bounds of the layer, calculates ... 505 */ 506 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 507 508 /** 509 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 510 */ 511 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 512 bool fboLayer, int alpha); 513 514 /** 515 * Creates a new layer stored in the specified snapshot. 516 * 517 * @param snapshot The snapshot associated with the new layer 518 * @param left The left coordinate of the layer 519 * @param top The top coordinate of the layer 520 * @param right The right coordinate of the layer 521 * @param bottom The bottom coordinate of the layer 522 * @param alpha The translucency of the layer 523 * @param mode The blending mode of the layer 524 * @param flags The layer save flags 525 * 526 * @return True if the layer was successfully created, false otherwise 527 */ 528 bool createLayer(float left, float top, float right, float bottom, 529 const SkPaint* paint, int flags); 530 531 /** 532 * Creates a new layer stored in the specified snapshot as an FBO. 533 * 534 * @param layer The layer to store as an FBO 535 * @param snapshot The snapshot associated with the new layer 536 * @param bounds The bounds of the layer 537 */ 538 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 539 540 /** 541 * Compose the specified layer as a region. 542 * 543 * @param layer The layer to compose 544 * @param rect The layer's bounds 545 */ 546 void composeLayerRegion(Layer* layer, const Rect& rect); 547 548 /** 549 * Compose the specified layer as a simple rectangle. 550 * 551 * @param layer The layer to compose 552 * @param rect The layer's bounds 553 * @param swap If true, the source and destination are swapped 554 */ 555 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 556 557 /** 558 * Clears all the regions corresponding to the current list of layers. 559 * This method MUST be invoked before any drawing operation. 560 */ 561 void clearLayerRegions(); 562 563 /** 564 * Mark the layer as dirty at the specified coordinates. The coordinates 565 * are transformed with the supplied matrix. 566 */ 567 void dirtyLayer(const float left, const float top, 568 const float right, const float bottom, const mat4 transform); 569 570 /** 571 * Mark the layer as dirty at the specified coordinates. 572 */ 573 void dirtyLayer(const float left, const float top, 574 const float right, const float bottom); 575 576 /** 577 * Draws a colored rectangle with the specified color. The specified coordinates 578 * are transformed by the current snapshot's transform matrix unless specified 579 * otherwise. 580 * 581 * @param left The left coordinate of the rectangle 582 * @param top The top coordinate of the rectangle 583 * @param right The right coordinate of the rectangle 584 * @param bottom The bottom coordinate of the rectangle 585 * @param paint The paint containing the color, blending mode, etc. 586 * @param ignoreTransform True if the current transform should be ignored 587 */ 588 void drawColorRect(float left, float top, float right, float bottom, 589 const SkPaint* paint, bool ignoreTransform = false); 590 591 /** 592 * Draws a series of colored rectangles with the specified color. The specified 593 * coordinates are transformed by the current snapshot's transform matrix unless 594 * specified otherwise. 595 * 596 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 597 * per rectangle 598 * @param paint The paint containing the color, blending mode, etc. 599 * @param ignoreTransform True if the current transform should be ignored 600 * @param dirty True if calling this method should dirty the current layer 601 * @param clip True if the rects should be clipped, false otherwise 602 */ 603 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 604 bool ignoreTransform = false, bool dirty = true, bool clip = true); 605 606 /** 607 * Draws the shape represented by the specified path texture. 608 * This method invokes drawPathTexture() but takes into account 609 * the extra left/top offset and the texture offset to correctly 610 * position the final shape. 611 * 612 * @param left The left coordinate of the shape to render 613 * @param top The top coordinate of the shape to render 614 * @param texture The texture reprsenting the shape 615 * @param paint The paint to draw the shape with 616 */ 617 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 618 619 /** 620 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 621 * different compositing rules. 622 * 623 * @param texture The texture to draw with 624 * @param left The x coordinate of the bitmap 625 * @param top The y coordinate of the bitmap 626 * @param paint The paint to render with 627 */ 628 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 629 630 /** 631 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 632 * 633 * @param vertexBuffer The VertexBuffer to be drawn 634 * @param paint The paint to render with 635 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 636 */ 637 status_t drawVertexBuffer(VertexBufferMode mode, const VertexBuffer& vertexBuffer, 638 const SkPaint* paint, bool useOffset = false); 639 640 /** 641 * Renders the convex hull defined by the specified path as a strip of polygons. 642 * 643 * @param path The hull of the path to draw 644 * @param paint The paint to render with 645 */ 646 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 647 648 /** 649 * Draws a textured rectangle with the specified texture. The specified coordinates 650 * are transformed by the current snapshot's transform matrix. 651 * 652 * @param left The left coordinate of the rectangle 653 * @param top The top coordinate of the rectangle 654 * @param right The right coordinate of the rectangle 655 * @param bottom The bottom coordinate of the rectangle 656 * @param texture The texture to use 657 * @param paint The paint containing the alpha, blending mode, etc. 658 */ 659 void drawTextureRect(float left, float top, float right, float bottom, 660 Texture* texture, const SkPaint* paint); 661 662 /** 663 * Draws a textured mesh with the specified texture. If the indices are omitted, 664 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 665 * VBO is bound. 666 * 667 * @param left The left coordinate of the rectangle 668 * @param top The top coordinate of the rectangle 669 * @param right The right coordinate of the rectangle 670 * @param bottom The bottom coordinate of the rectangle 671 * @param texture The texture name to map onto the rectangle 672 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 673 * @param blend True if the texture contains an alpha channel 674 * @param vertices The vertices that define the mesh 675 * @param texCoords The texture coordinates of each vertex 676 * @param elementsCount The number of elements in the mesh, required by indices 677 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 678 * @param ignoreTransform True if the current transform should be ignored 679 * @param vbo The VBO used to draw the mesh 680 * @param modelViewMode Defines whether the model view matrix should be scaled 681 * @param dirty True if calling this method should dirty the current layer 682 */ 683 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 684 const SkPaint* paint, bool blend, 685 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 686 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 687 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 688 689 void drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 690 const SkPaint* paint, bool blend, 691 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 692 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 693 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 694 695 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 696 GLuint texture, const SkPaint* paint, 697 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 698 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 699 bool dirty = true); 700 701 /** 702 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 703 * If the number of vertices to draw exceeds the number of indices we have 704 * pre-allocated, this method will generate several glDrawElements() calls. 705 */ 706 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 707 708 /** 709 * Draws text underline and strike-through if needed. 710 * 711 * @param text The text to decor 712 * @param bytesCount The number of bytes in the text 713 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 714 * @param x The x coordinate where the text will be drawn 715 * @param y The y coordinate where the text will be drawn 716 * @param paint The paint to draw the text with 717 */ 718 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 719 720 /** 721 * Draws shadow layer on text (with optional positions). 722 * 723 * @param paint The paint to draw the shadow with 724 * @param text The text to draw 725 * @param bytesCount The number of bytes in the text 726 * @param count The number of glyphs in the text 727 * @param positions The x, y positions of individual glyphs (or NULL) 728 * @param fontRenderer The font renderer object 729 * @param alpha The alpha value for drawing the shadow 730 * @param x The x coordinate where the shadow will be drawn 731 * @param y The y coordinate where the shadow will be drawn 732 */ 733 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 734 const float* positions, FontRenderer& fontRenderer, int alpha, 735 float x, float y); 736 737 /** 738 * Draws a path texture. Path textures are alpha8 bitmaps that need special 739 * compositing to apply colors/filters/etc. 740 * 741 * @param texture The texture to render 742 * @param x The x coordinate where the texture will be drawn 743 * @param y The y coordinate where the texture will be drawn 744 * @param paint The paint to draw the texture with 745 */ 746 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 747 748 /** 749 * Resets the texture coordinates stored in mMeshVertices. Setting the values 750 * back to default is achieved by calling: 751 * 752 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 753 * 754 * @param u1 The left coordinate of the texture 755 * @param v1 The bottom coordinate of the texture 756 * @param u2 The right coordinate of the texture 757 * @param v2 The top coordinate of the texture 758 */ 759 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 760 761 /** 762 * Returns true if the specified paint will draw invisible text. 763 */ 764 bool canSkipText(const SkPaint* paint) const; 765 766 /** 767 * Binds the specified texture. The texture unit must have been selected 768 * prior to calling this method. 769 */ 770 inline void bindTexture(GLuint texture) { 771 mCaches.bindTexture(texture); 772 } 773 774 /** 775 * Binds the specified EGLImage texture. The texture unit must have been selected 776 * prior to calling this method. 777 */ 778 inline void bindExternalTexture(GLuint texture) { 779 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 780 } 781 782 /** 783 * Enable or disable blending as necessary. This function sets the appropriate 784 * blend function based on the specified xfermode. 785 */ 786 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 787 bool swapSrcDst = false); 788 789 /** 790 * Use the specified program with the current GL context. If the program is already 791 * in use, it will not be bound again. If it is not in use, the current program is 792 * marked unused and the specified program becomes used and becomes the new 793 * current program. 794 * 795 * @param program The program to use 796 * 797 * @return true If the specified program was already in use, false otherwise. 798 */ 799 inline bool useProgram(Program* program); 800 801 /** 802 * Invoked before any drawing operation. This sets required state. 803 */ 804 void setupDraw(bool clear = true); 805 806 /** 807 * Various methods to setup OpenGL rendering. 808 */ 809 void setupDrawWithTexture(bool isAlpha8 = false); 810 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 811 void setupDrawWithExternalTexture(); 812 void setupDrawNoTexture(); 813 void setupDrawAA(); 814 void setupDrawColor(int color, int alpha); 815 void setupDrawColor(float r, float g, float b, float a); 816 void setupDrawAlpha8Color(int color, int alpha); 817 void setupDrawTextGamma(const SkPaint* paint); 818 void setupDrawShader(); 819 void setupDrawColorFilter(const SkColorFilter* filter); 820 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 821 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 822 void setupDrawProgram(); 823 void setupDrawDirtyRegionsDisabled(); 824 825 /** 826 * Setup the current program matrices based upon the nature of the geometry. 827 * 828 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 829 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 830 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 831 * transformations are stored in the modelView matrix and uploaded to the shader. 832 * 833 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 834 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 835 * 836 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 837 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 838 * or when simple translation has been extracted) 839 */ 840 void setupDrawModelView(ModelViewMode mode, bool offset, 841 float left, float top, float right, float bottom, bool ignoreTransform = false); 842 void setupDrawColorUniforms(); 843 void setupDrawPureColorUniforms(); 844 void setupDrawShaderUniforms(bool ignoreTransform = false); 845 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 846 void setupDrawSimpleMesh(); 847 void setupDrawTexture(GLuint texture); 848 void setupDrawExternalTexture(GLuint texture); 849 void setupDrawTextureTransform(); 850 void setupDrawTextureTransformUniforms(mat4& transform); 851 void setupDrawTextGammaUniforms(); 852 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 853 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 854 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 855 void setupDrawIndexedVertices(GLvoid* vertices); 856 void accountForClear(SkXfermode::Mode mode); 857 858 bool updateLayer(Layer* layer, bool inFrame); 859 void updateLayers(); 860 void flushLayers(); 861 862#if DEBUG_LAYERS_AS_REGIONS 863 /** 864 * Renders the specified region as a series of rectangles. This method 865 * is used for debugging only. 866 */ 867 void drawRegionRectsDebug(const Region& region); 868#endif 869 870 /** 871 * Renders the specified region as a series of rectangles. The region 872 * must be in screen-space coordinates. 873 */ 874 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 875 876 /** 877 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 878 * is turned on. 879 */ 880 void debugClip(); 881 882 void debugOverdraw(bool enable, bool clear); 883 void renderOverdraw(); 884 void countOverdraw(); 885 886 /** 887 * Should be invoked every time the glScissor is modified. 888 */ 889 inline void dirtyClip() { 890 mDirtyClip = true; 891 } 892 893 inline const UvMapper& getMapper(const Texture* texture) { 894 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 895 } 896 897 /** 898 * Returns a texture object for the specified bitmap. The texture can 899 * come from the texture cache or an atlas. If this method returns 900 * NULL, the texture could not be found and/or allocated. 901 */ 902 Texture* getTexture(const SkBitmap* bitmap); 903 904 // Matrix used for view/projection in shaders 905 mat4 mViewProjMatrix; 906 907 /** 908 * Model-view matrix used to position/size objects 909 * 910 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 911 * currentTransform(). 912 * 913 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 914 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 915 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 916 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 917 * bitmap. 918 * 919 * Used as input to SkiaShader transformation. 920 */ 921 mat4 mModelView; 922 923 // State used to define the clipping region 924 Rect mTilingClip; 925 // Is the target render surface opaque 926 bool mOpaque; 927 // Is a frame currently being rendered 928 bool mFrameStarted; 929 930 // Used to draw textured quads 931 TextureVertex mMeshVertices[4]; 932 933 // Default UV mapper 934 const UvMapper mUvMapper; 935 936 // shader, filters, and shadow 937 DrawModifiers mDrawModifiers; 938 SkPaint mFilteredPaint; 939 940 // Various caches 941 Caches& mCaches; 942 Extensions& mExtensions; 943 944 // List of rectangles to clear after saveLayer() is invoked 945 Vector<Rect*> mLayers; 946 // List of functors to invoke after a frame is drawn 947 SortedVector<Functor*> mFunctors; 948 // List of layers to update at the beginning of a frame 949 Vector<Layer*> mLayerUpdates; 950 951 // The following fields are used to setup drawing 952 // Used to describe the shaders to generate 953 ProgramDescription mDescription; 954 // Color description 955 bool mColorSet; 956 float mColorA, mColorR, mColorG, mColorB; 957 // Indicates that the shader should get a color 958 bool mSetShaderColor; 959 // Current texture unit 960 GLuint mTextureUnit; 961 // Track dirty regions, true by default 962 bool mTrackDirtyRegions; 963 // Indicate whether we are drawing an opaque frame 964 bool mOpaqueFrame; 965 966 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 967 // Properties.h 968 bool mScissorOptimizationDisabled; 969 970 // No-ops start/endTiling when set 971 bool mSuppressTiling; 972 973 // If true, this renderer will setup drawing to emulate 974 // an increment stencil buffer in the color buffer 975 bool mCountOverdraw; 976 float mOverdraw; 977 978 friend class DisplayListRenderer; 979 friend class Layer; 980 friend class TextSetupFunctor; 981 friend class DrawBitmapOp; 982 friend class DrawPatchOp; 983 984}; // class OpenGLRenderer 985 986}; // namespace uirenderer 987}; // namespace android 988 989#endif // ANDROID_HWUI_OPENGL_RENDERER_H 990