OpenGLRenderer.h revision 024433f89684e1f9cb7b15ade7c480c9346fbe4d
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); 165 166 int saveLayerDeferred(float left, float top, float right, float bottom, 167 const SkPaint* paint, int flags); 168 169 virtual status_t drawDisplayList(RenderNode* displayList, Rect& dirty, int32_t replayFlags = 1); 170 virtual status_t drawLayer(Layer* layer, float x, float y); 171 virtual status_t drawBitmap(const SkBitmap* bitmap, float left, float top, 172 const SkPaint* paint); 173 status_t drawBitmaps(const SkBitmap* bitmap, AssetAtlas::Entry* entry, int bitmapCount, 174 TextureVertex* vertices, bool pureTranslate, const Rect& bounds, const SkPaint* paint); 175 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkMatrix* matrix, 176 const SkPaint* paint); 177 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 178 float srcRight, float srcBottom, float dstLeft, float dstTop, 179 float dstRight, float dstBottom, const SkPaint* paint); 180 virtual status_t drawBitmapData(const SkBitmap* bitmap, float left, float top, 181 const SkPaint* paint); 182 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 183 const float* vertices, const int* colors, const SkPaint* paint); 184 status_t drawPatches(const SkBitmap* bitmap, AssetAtlas::Entry* entry, 185 TextureVertex* vertices, uint32_t indexCount, const SkPaint* paint); 186 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 187 float left, float top, float right, float bottom, const SkPaint* paint); 188 status_t drawPatch(const SkBitmap* bitmap, const Patch* mesh, AssetAtlas::Entry* entry, 189 float left, float top, float right, float bottom, const SkPaint* paint); 190 virtual status_t drawColor(int color, SkXfermode::Mode mode); 191 virtual status_t drawRect(float left, float top, float right, float bottom, 192 const SkPaint* paint); 193 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 194 float rx, float ry, const SkPaint* paint); 195 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint); 196 virtual status_t drawOval(float left, float top, float right, float bottom, 197 const SkPaint* paint); 198 virtual status_t drawArc(float left, float top, float right, float bottom, 199 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint); 200 virtual status_t drawPath(const SkPath* path, const SkPaint* paint); 201 virtual status_t drawLines(const float* points, int count, const SkPaint* paint); 202 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint); 203 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 204 float hOffset, float vOffset, const SkPaint* paint); 205 virtual status_t drawPosText(const char* text, int bytesCount, int count, 206 const float* positions, const SkPaint* paint); 207 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 208 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 209 DrawOpMode drawOpMode = kDrawOpMode_Immediate); 210 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint); 211 212 status_t drawShadow(const mat4& casterTransformXY, const mat4& casterTransformZ, 213 float casterAlpha, bool casterUnclipped, const SkPath* casterPerimeter); 214 215 virtual void resetShader(); 216 virtual void setupShader(SkiaShader* shader); 217 218 virtual void resetShadow(); 219 virtual void setupShadow(float radius, float dx, float dy, int color); 220 221 virtual void resetPaintFilter(); 222 virtual void setupPaintFilter(int clearBits, int setBits); 223 224 // If this value is set to < 1.0, it overrides alpha set on layer (see drawBitmap, drawLayer) 225 void setOverrideLayerAlpha(float alpha) { mDrawModifiers.mOverrideLayerAlpha = alpha; } 226 227 const SkPaint* filterPaint(const SkPaint* paint); 228 229 /** 230 * Store the current display state (most importantly, the current clip and transform), and 231 * additionally map the state's bounds from local to window coordinates. 232 * 233 * Returns true if quick-rejected 234 */ 235 bool storeDisplayState(DeferredDisplayState& state, int stateDeferFlags); 236 void restoreDisplayState(const DeferredDisplayState& state, bool skipClipRestore = false); 237 void setupMergedMultiDraw(const Rect* clipRect); 238 239 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 240 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 241 242 ANDROID_API bool isCurrentTransformSimple() { 243 return currentTransform()->isSimple(); 244 } 245 246 Caches& getCaches() { 247 return mCaches; 248 } 249 250 // simple rect clip 251 bool isCurrentClipSimple() { 252 return mSnapshot->clipRegion->isEmpty(); 253 } 254 255 int getViewportWidth() { return currentSnapshot()->viewport.getWidth(); } 256 int getViewportHeight() { return currentSnapshot()->viewport.getHeight(); } 257 258 /** 259 * Scales the alpha on the current snapshot. This alpha value will be modulated 260 * with other alpha values when drawing primitives. 261 */ 262 void scaleAlpha(float alpha) { 263 mSnapshot->alpha *= alpha; 264 } 265 266 /** 267 * Inserts a named event marker in the stream of GL commands. 268 */ 269 void eventMark(const char* name) const; 270 271 /** 272 * Inserts a named group marker in the stream of GL commands. This marker 273 * can be used by tools to group commands into logical groups. A call to 274 * this method must always be followed later on by a call to endMark(). 275 */ 276 void startMark(const char* name) const; 277 278 /** 279 * Closes the last group marker opened by startMark(). 280 */ 281 void endMark() const; 282 283 /** 284 * Gets the alpha and xfermode out of a paint object. If the paint is null 285 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 286 * not multiply the paint's alpha by the current snapshot's alpha, and does 287 * not replace the alpha with the overrideLayerAlpha 288 * 289 * @param paint The paint to extract values from 290 * @param alpha Where to store the resulting alpha 291 * @param mode Where to store the resulting xfermode 292 */ 293 static inline void getAlphaAndModeDirect(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 294 *mode = getXfermodeDirect(paint); 295 *alpha = getAlphaDirect(paint); 296 } 297 298 static inline SkXfermode::Mode getXfermodeDirect(const SkPaint* paint) { 299 if (!paint) return SkXfermode::kSrcOver_Mode; 300 return getXfermode(paint->getXfermode()); 301 } 302 303 static inline int getAlphaDirect(const SkPaint* paint) { 304 if (!paint) return 255; 305 return paint->getAlpha(); 306 } 307 308 /** 309 * Return the best transform to use to rasterize text given a full 310 * transform matrix. 311 */ 312 mat4 findBestFontTransform(const mat4& transform) const; 313 314#if DEBUG_MERGE_BEHAVIOR 315 void drawScreenSpaceColorRect(float left, float top, float right, float bottom, int color) { 316 mCaches.setScissorEnabled(false); 317 318 // should only be called outside of other draw ops, so stencil can only be in test state 319 bool stencilWasEnabled = mCaches.stencil.isTestEnabled(); 320 mCaches.stencil.disable(); 321 322 drawColorRect(left, top, right, bottom, color, SkXfermode::kSrcOver_Mode, true); 323 324 if (stencilWasEnabled) mCaches.stencil.enableTest(); 325 } 326#endif 327 328protected: 329 /** 330 * Computes the projection matrix, initialize the first snapshot 331 * and stores the dimensions of the render target. 332 */ 333 void initViewport(int width, int height); 334 335 /** 336 * Perform the setup specific to a frame. This method does not 337 * issue any OpenGL commands. 338 */ 339 void setupFrameState(float left, float top, float right, float bottom, bool opaque); 340 341 /** 342 * Indicates the start of rendering. This method will setup the 343 * initial OpenGL state (viewport, clearing the buffer, etc.) 344 */ 345 status_t startFrame(); 346 347 /** 348 * Clears the underlying surface if needed. 349 */ 350 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 351 352 /** 353 * Call this method after updating a layer during a drawing pass. 354 */ 355 void resumeAfterLayer(); 356 357 /** 358 * This method is called whenever a stencil buffer is required. Subclasses 359 * should override this method and call attachStencilBufferToLayer() on the 360 * appropriate layer(s). 361 */ 362 virtual void ensureStencilBuffer(); 363 364 /** 365 * Obtains a stencil render buffer (allocating it if necessary) and 366 * attaches it to the specified layer. 367 */ 368 void attachStencilBufferToLayer(Layer* layer); 369 370 bool quickRejectSetupScissor(float left, float top, float right, float bottom, 371 const SkPaint* paint = NULL); 372 bool quickRejectSetupScissor(const Rect& bounds, const SkPaint* paint = NULL) { 373 return quickRejectSetupScissor(bounds.left, bounds.top, 374 bounds.right, bounds.bottom, paint); 375 } 376 377 /** 378 * Compose the layer defined in the current snapshot with the layer 379 * defined by the previous snapshot. 380 * 381 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 382 * 383 * @param curent The current snapshot containing the layer to compose 384 * @param previous The previous snapshot to compose the current layer with 385 */ 386 virtual void composeLayer(const Snapshot& current, const Snapshot& previous); 387 388 /** 389 * Marks the specified region as dirty at the specified bounds. 390 */ 391 void dirtyLayerUnchecked(Rect& bounds, Region* region); 392 393 /** 394 * Returns the region of the current layer. 395 */ 396 virtual Region* getRegion() const { 397 return mSnapshot->region; 398 } 399 400 /** 401 * Indicates whether rendering is currently targeted at a layer. 402 */ 403 virtual bool hasLayer() const { 404 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 405 } 406 407 /** 408 * Returns the name of the FBO this renderer is rendering into. 409 */ 410 virtual GLuint getTargetFbo() const { 411 return 0; 412 } 413 414 /** 415 * Renders the specified layer as a textured quad. 416 * 417 * @param layer The layer to render 418 * @param rect The bounds of the layer 419 */ 420 void drawTextureLayer(Layer* layer, const Rect& rect); 421 422 /** 423 * Gets the alpha and xfermode out of a paint object. If the paint is null 424 * alpha will be 255 and the xfermode will be SRC_OVER. Accounts for both 425 * snapshot alpha, and overrideLayerAlpha 426 * 427 * @param paint The paint to extract values from 428 * @param alpha Where to store the resulting alpha 429 * @param mode Where to store the resulting xfermode 430 */ 431 inline void getAlphaAndMode(const SkPaint* paint, int* alpha, SkXfermode::Mode* mode) const; 432 433 /** 434 * Gets the alpha from a layer, accounting for snapshot alpha and overrideLayerAlpha 435 * 436 * @param layer The layer from which the alpha is extracted 437 */ 438 inline float getLayerAlpha(const Layer* layer) const; 439 440 /** 441 * Safely retrieves the ColorFilter from the given Paint. If the paint is 442 * null then null is returned. 443 */ 444 static inline SkColorFilter* getColorFilter(const SkPaint* paint) { 445 return paint ? paint->getColorFilter() : NULL; 446 } 447 448 /** 449 * Set to true to suppress error checks at the end of a frame. 450 */ 451 virtual bool suppressErrorChecks() const { 452 return false; 453 } 454 455private: 456 /** 457 * Discards the content of the framebuffer if supported by the driver. 458 * This method should be called at the beginning of a frame to optimize 459 * rendering on some tiler architectures. 460 */ 461 void discardFramebuffer(float left, float top, float right, float bottom); 462 463 /** 464 * Ensures the state of the renderer is the same as the state of 465 * the GL context. 466 */ 467 void syncState(); 468 469 /** 470 * Tells the GPU what part of the screen is about to be redrawn. 471 * This method will use the current layer space clip rect. 472 * This method needs to be invoked every time getTargetFbo() is 473 * bound again. 474 */ 475 void startTilingCurrentClip(bool opaque = false); 476 477 /** 478 * Tells the GPU what part of the screen is about to be redrawn. 479 * This method needs to be invoked every time getTargetFbo() is 480 * bound again. 481 */ 482 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 483 484 /** 485 * Tells the GPU that we are done drawing the frame or that we 486 * are switching to another render target. 487 */ 488 void endTiling(); 489 490 void onSnapshotRestored(const Snapshot& removed, const Snapshot& restored); 491 492 /** 493 * Sets the clipping rectangle using glScissor. The clip is defined by 494 * the current snapshot's clipRect member. 495 */ 496 void setScissorFromClip(); 497 498 /** 499 * Sets the clipping region using the stencil buffer. The clip region 500 * is defined by the current snapshot's clipRegion member. 501 */ 502 void setStencilFromClip(); 503 504 /** 505 * Given the local bounds of the layer, calculates ... 506 */ 507 void calculateLayerBoundsAndClip(Rect& bounds, Rect& clip, bool fboLayer); 508 509 /** 510 * Given the local bounds + clip of the layer, updates current snapshot's empty/invisible 511 */ 512 void updateSnapshotIgnoreForLayer(const Rect& bounds, const Rect& clip, 513 bool fboLayer, int alpha); 514 515 /** 516 * Creates a new layer stored in the specified snapshot. 517 * 518 * @param snapshot The snapshot associated with the new layer 519 * @param left The left coordinate of the layer 520 * @param top The top coordinate of the layer 521 * @param right The right coordinate of the layer 522 * @param bottom The bottom coordinate of the layer 523 * @param alpha The translucency of the layer 524 * @param mode The blending mode of the layer 525 * @param flags The layer save flags 526 * 527 * @return True if the layer was successfully created, false otherwise 528 */ 529 bool createLayer(float left, float top, float right, float bottom, 530 const SkPaint* paint, int flags); 531 532 /** 533 * Creates a new layer stored in the specified snapshot as an FBO. 534 * 535 * @param layer The layer to store as an FBO 536 * @param snapshot The snapshot associated with the new layer 537 * @param bounds The bounds of the layer 538 */ 539 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip); 540 541 /** 542 * Compose the specified layer as a region. 543 * 544 * @param layer The layer to compose 545 * @param rect The layer's bounds 546 */ 547 void composeLayerRegion(Layer* layer, const Rect& rect); 548 549 /** 550 * Compose the specified layer as a simple rectangle. 551 * 552 * @param layer The layer to compose 553 * @param rect The layer's bounds 554 * @param swap If true, the source and destination are swapped 555 */ 556 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 557 558 /** 559 * Clears all the regions corresponding to the current list of layers. 560 * This method MUST be invoked before any drawing operation. 561 */ 562 void clearLayerRegions(); 563 564 /** 565 * Mark the layer as dirty at the specified coordinates. The coordinates 566 * are transformed with the supplied matrix. 567 */ 568 void dirtyLayer(const float left, const float top, 569 const float right, const float bottom, const mat4 transform); 570 571 /** 572 * Mark the layer as dirty at the specified coordinates. 573 */ 574 void dirtyLayer(const float left, const float top, 575 const float right, const float bottom); 576 577 /** 578 * Draws a colored rectangle with the specified color. The specified coordinates 579 * are transformed by the current snapshot's transform matrix unless specified 580 * otherwise. 581 * 582 * @param left The left coordinate of the rectangle 583 * @param top The top coordinate of the rectangle 584 * @param right The right coordinate of the rectangle 585 * @param bottom The bottom coordinate of the rectangle 586 * @param paint The paint containing the color, blending mode, etc. 587 * @param ignoreTransform True if the current transform should be ignored 588 */ 589 void drawColorRect(float left, float top, float right, float bottom, 590 const SkPaint* paint, bool ignoreTransform = false); 591 592 /** 593 * Draws a series of colored rectangles with the specified color. The specified 594 * coordinates are transformed by the current snapshot's transform matrix unless 595 * specified otherwise. 596 * 597 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 598 * per rectangle 599 * @param paint The paint containing the color, blending mode, etc. 600 * @param ignoreTransform True if the current transform should be ignored 601 * @param dirty True if calling this method should dirty the current layer 602 * @param clip True if the rects should be clipped, false otherwise 603 */ 604 status_t drawColorRects(const float* rects, int count, const SkPaint* paint, 605 bool ignoreTransform = false, bool dirty = true, bool clip = true); 606 607 /** 608 * Draws the shape represented by the specified path texture. 609 * This method invokes drawPathTexture() but takes into account 610 * the extra left/top offset and the texture offset to correctly 611 * position the final shape. 612 * 613 * @param left The left coordinate of the shape to render 614 * @param top The top coordinate of the shape to render 615 * @param texture The texture reprsenting the shape 616 * @param paint The paint to draw the shape with 617 */ 618 status_t drawShape(float left, float top, const PathTexture* texture, const SkPaint* paint); 619 620 /** 621 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 622 * different compositing rules. 623 * 624 * @param texture The texture to draw with 625 * @param left The x coordinate of the bitmap 626 * @param top The y coordinate of the bitmap 627 * @param paint The paint to render with 628 */ 629 void drawAlphaBitmap(Texture* texture, float left, float top, const SkPaint* paint); 630 631 /** 632 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 633 * 634 * @param vertexBuffer The VertexBuffer to be drawn 635 * @param paint The paint to render with 636 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 637 */ 638 status_t drawVertexBuffer(VertexBufferMode mode, const VertexBuffer& vertexBuffer, 639 const SkPaint* paint, bool useOffset = false); 640 641 /** 642 * Renders the convex hull defined by the specified path as a strip of polygons. 643 * 644 * @param path The hull of the path to draw 645 * @param paint The paint to render with 646 */ 647 status_t drawConvexPath(const SkPath& path, const SkPaint* paint); 648 649 /** 650 * Draws a textured rectangle with the specified texture. The specified coordinates 651 * are transformed by the current snapshot's transform matrix. 652 * 653 * @param left The left coordinate of the rectangle 654 * @param top The top coordinate of the rectangle 655 * @param right The right coordinate of the rectangle 656 * @param bottom The bottom coordinate of the rectangle 657 * @param texture The texture to use 658 * @param paint The paint containing the alpha, blending mode, etc. 659 */ 660 void drawTextureRect(float left, float top, float right, float bottom, 661 Texture* texture, const SkPaint* paint); 662 663 /** 664 * Draws a textured mesh with the specified texture. If the indices are omitted, 665 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 666 * VBO is bound. 667 * 668 * @param left The left coordinate of the rectangle 669 * @param top The top coordinate of the rectangle 670 * @param right The right coordinate of the rectangle 671 * @param bottom The bottom coordinate of the rectangle 672 * @param texture The texture name to map onto the rectangle 673 * @param paint The paint containing the alpha, blending mode, colorFilter, etc. 674 * @param blend True if the texture contains an alpha channel 675 * @param vertices The vertices that define the mesh 676 * @param texCoords The texture coordinates of each vertex 677 * @param elementsCount The number of elements in the mesh, required by indices 678 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 679 * @param ignoreTransform True if the current transform should be ignored 680 * @param vbo The VBO used to draw the mesh 681 * @param modelViewMode Defines whether the model view matrix should be scaled 682 * @param dirty True if calling this method should dirty the current layer 683 */ 684 void drawTextureMesh(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 drawIndexedTextureMesh(float left, float top, float right, float bottom, GLuint texture, 691 const SkPaint* paint, bool blend, 692 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 693 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 694 ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, bool dirty = true); 695 696 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 697 GLuint texture, const SkPaint* paint, 698 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 699 bool ignoreTransform, ModelViewMode modelViewMode = kModelViewMode_TranslateAndScale, 700 bool dirty = true); 701 702 /** 703 * Draws the specified list of vertices as quads using indexed GL_TRIANGLES. 704 * If the number of vertices to draw exceeds the number of indices we have 705 * pre-allocated, this method will generate several glDrawElements() calls. 706 */ 707 void issueIndexedQuadDraw(Vertex* mesh, GLsizei quadsCount); 708 709 /** 710 * Draws text underline and strike-through if needed. 711 * 712 * @param text The text to decor 713 * @param bytesCount The number of bytes in the text 714 * @param totalAdvance The total advance in pixels, defines underline/strikethrough length 715 * @param x The x coordinate where the text will be drawn 716 * @param y The y coordinate where the text will be drawn 717 * @param paint The paint to draw the text with 718 */ 719 void drawTextDecorations(float totalAdvance, float x, float y, const SkPaint* paint); 720 721 /** 722 * Draws shadow layer on text (with optional positions). 723 * 724 * @param paint The paint to draw the shadow with 725 * @param text The text to draw 726 * @param bytesCount The number of bytes in the text 727 * @param count The number of glyphs in the text 728 * @param positions The x, y positions of individual glyphs (or NULL) 729 * @param fontRenderer The font renderer object 730 * @param alpha The alpha value for drawing the shadow 731 * @param x The x coordinate where the shadow will be drawn 732 * @param y The y coordinate where the shadow will be drawn 733 */ 734 void drawTextShadow(const SkPaint* paint, const char* text, int bytesCount, int count, 735 const float* positions, FontRenderer& fontRenderer, int alpha, 736 float x, float y); 737 738 /** 739 * Draws a path texture. Path textures are alpha8 bitmaps that need special 740 * compositing to apply colors/filters/etc. 741 * 742 * @param texture The texture to render 743 * @param x The x coordinate where the texture will be drawn 744 * @param y The y coordinate where the texture will be drawn 745 * @param paint The paint to draw the texture with 746 */ 747 void drawPathTexture(const PathTexture* texture, float x, float y, const SkPaint* paint); 748 749 /** 750 * Resets the texture coordinates stored in mMeshVertices. Setting the values 751 * back to default is achieved by calling: 752 * 753 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 754 * 755 * @param u1 The left coordinate of the texture 756 * @param v1 The bottom coordinate of the texture 757 * @param u2 The right coordinate of the texture 758 * @param v2 The top coordinate of the texture 759 */ 760 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 761 762 /** 763 * Returns true if the specified paint will draw invisible text. 764 */ 765 bool canSkipText(const SkPaint* paint) const; 766 767 /** 768 * Binds the specified texture. The texture unit must have been selected 769 * prior to calling this method. 770 */ 771 inline void bindTexture(GLuint texture) { 772 mCaches.bindTexture(texture); 773 } 774 775 /** 776 * Binds the specified EGLImage texture. The texture unit must have been selected 777 * prior to calling this method. 778 */ 779 inline void bindExternalTexture(GLuint texture) { 780 mCaches.bindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 781 } 782 783 /** 784 * Enable or disable blending as necessary. This function sets the appropriate 785 * blend function based on the specified xfermode. 786 */ 787 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 788 bool swapSrcDst = false); 789 790 /** 791 * Use the specified program with the current GL context. If the program is already 792 * in use, it will not be bound again. If it is not in use, the current program is 793 * marked unused and the specified program becomes used and becomes the new 794 * current program. 795 * 796 * @param program The program to use 797 * 798 * @return true If the specified program was already in use, false otherwise. 799 */ 800 inline bool useProgram(Program* program); 801 802 /** 803 * Invoked before any drawing operation. This sets required state. 804 */ 805 void setupDraw(bool clear = true); 806 807 /** 808 * Various methods to setup OpenGL rendering. 809 */ 810 void setupDrawWithTexture(bool isAlpha8 = false); 811 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 812 void setupDrawWithExternalTexture(); 813 void setupDrawNoTexture(); 814 void setupDrawAA(); 815 void setupDrawColor(int color, int alpha); 816 void setupDrawColor(float r, float g, float b, float a); 817 void setupDrawAlpha8Color(int color, int alpha); 818 void setupDrawTextGamma(const SkPaint* paint); 819 void setupDrawShader(); 820 void setupDrawColorFilter(const SkColorFilter* filter); 821 void setupDrawBlending(const Layer* layer, bool swapSrcDst = false); 822 void setupDrawBlending(const SkPaint* paint, bool blend = true, bool swapSrcDst = false); 823 void setupDrawProgram(); 824 void setupDrawDirtyRegionsDisabled(); 825 826 /** 827 * Setup the current program matrices based upon the nature of the geometry. 828 * 829 * @param mode If kModelViewMode_Translate, the geometry must be translated by the left and top 830 * parameters. If kModelViewMode_TranslateAndScale, the geometry that exists in the (0,0, 1,1) 831 * space must be scaled up and translated to fill the quad provided in (l,t,r,b). These 832 * transformations are stored in the modelView matrix and uploaded to the shader. 833 * 834 * @param offset Set to true if the the matrix should be fudged (translated) slightly to disambiguate 835 * geometry pixel positioning. See Vertex::GeometryFudgeFactor(). 836 * 837 * @param ignoreTransform Set to true if l,t,r,b coordinates already in layer space, 838 * currentTransform() will be ignored. (e.g. when drawing clip in layer coordinates to stencil, 839 * or when simple translation has been extracted) 840 */ 841 void setupDrawModelView(ModelViewMode mode, bool offset, 842 float left, float top, float right, float bottom, bool ignoreTransform = false); 843 void setupDrawColorUniforms(); 844 void setupDrawPureColorUniforms(); 845 void setupDrawShaderUniforms(bool ignoreTransform = false); 846 void setupDrawColorFilterUniforms(const SkColorFilter* paint); 847 void setupDrawSimpleMesh(); 848 void setupDrawTexture(GLuint texture); 849 void setupDrawExternalTexture(GLuint texture); 850 void setupDrawTextureTransform(); 851 void setupDrawTextureTransformUniforms(mat4& transform); 852 void setupDrawTextGammaUniforms(); 853 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords = NULL, GLuint vbo = 0); 854 void setupDrawMesh(const GLvoid* vertices, const GLvoid* texCoords, const GLvoid* colors); 855 void setupDrawMeshIndices(const GLvoid* vertices, const GLvoid* texCoords, GLuint vbo = 0); 856 void setupDrawIndexedVertices(GLvoid* vertices); 857 void accountForClear(SkXfermode::Mode mode); 858 859 bool updateLayer(Layer* layer, bool inFrame); 860 void updateLayers(); 861 void flushLayers(); 862 863#if DEBUG_LAYERS_AS_REGIONS 864 /** 865 * Renders the specified region as a series of rectangles. This method 866 * is used for debugging only. 867 */ 868 void drawRegionRectsDebug(const Region& region); 869#endif 870 871 /** 872 * Renders the specified region as a series of rectangles. The region 873 * must be in screen-space coordinates. 874 */ 875 void drawRegionRects(const SkRegion& region, const SkPaint& paint, bool dirty = false); 876 877 /** 878 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 879 * is turned on. 880 */ 881 void debugClip(); 882 883 void debugOverdraw(bool enable, bool clear); 884 void renderOverdraw(); 885 void countOverdraw(); 886 887 /** 888 * Should be invoked every time the glScissor is modified. 889 */ 890 inline void dirtyClip() { 891 mDirtyClip = true; 892 } 893 894 inline const UvMapper& getMapper(const Texture* texture) { 895 return texture && texture->uvMapper ? *texture->uvMapper : mUvMapper; 896 } 897 898 /** 899 * Returns a texture object for the specified bitmap. The texture can 900 * come from the texture cache or an atlas. If this method returns 901 * NULL, the texture could not be found and/or allocated. 902 */ 903 Texture* getTexture(const SkBitmap* bitmap); 904 905 // Matrix used for view/projection in shaders 906 mat4 mViewProjMatrix; 907 908 /** 909 * Model-view matrix used to position/size objects 910 * 911 * Stores operation-local modifications to the draw matrix that aren't incorporated into the 912 * currentTransform(). 913 * 914 * If generated with kModelViewMode_Translate, the mModelView will reflect an x/y offset, 915 * e.g. the offset in drawLayer(). If generated with kModelViewMode_TranslateAndScale, 916 * mModelView will reflect a translation and scale, e.g. the translation and scale required to 917 * make VBO 0 (a rect of (0,0,1,1)) scaled to match the x,y offset, and width/height of a 918 * bitmap. 919 * 920 * Used as input to SkiaShader transformation. 921 */ 922 mat4 mModelView; 923 924 // State used to define the clipping region 925 Rect mTilingClip; 926 // Is the target render surface opaque 927 bool mOpaque; 928 // Is a frame currently being rendered 929 bool mFrameStarted; 930 931 // Used to draw textured quads 932 TextureVertex mMeshVertices[4]; 933 934 // Default UV mapper 935 const UvMapper mUvMapper; 936 937 // shader, filters, and shadow 938 DrawModifiers mDrawModifiers; 939 SkPaint mFilteredPaint; 940 941 // Various caches 942 Caches& mCaches; 943 Extensions& mExtensions; 944 945 // List of rectangles to clear after saveLayer() is invoked 946 Vector<Rect*> mLayers; 947 // List of functors to invoke after a frame is drawn 948 SortedVector<Functor*> mFunctors; 949 // List of layers to update at the beginning of a frame 950 Vector<Layer*> mLayerUpdates; 951 952 // The following fields are used to setup drawing 953 // Used to describe the shaders to generate 954 ProgramDescription mDescription; 955 // Color description 956 bool mColorSet; 957 float mColorA, mColorR, mColorG, mColorB; 958 // Indicates that the shader should get a color 959 bool mSetShaderColor; 960 // Current texture unit 961 GLuint mTextureUnit; 962 // Track dirty regions, true by default 963 bool mTrackDirtyRegions; 964 // Indicate whether we are drawing an opaque frame 965 bool mOpaqueFrame; 966 967 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 968 // Properties.h 969 bool mScissorOptimizationDisabled; 970 971 // No-ops start/endTiling when set 972 bool mSuppressTiling; 973 974 // If true, this renderer will setup drawing to emulate 975 // an increment stencil buffer in the color buffer 976 bool mCountOverdraw; 977 float mOverdraw; 978 979 friend class DisplayListRenderer; 980 friend class Layer; 981 friend class TextSetupFunctor; 982 friend class DrawBitmapOp; 983 friend class DrawPatchOp; 984 985}; // class OpenGLRenderer 986 987}; // namespace uirenderer 988}; // namespace android 989 990#endif // ANDROID_HWUI_OPENGL_RENDERER_H 991