OpenGLRenderer.h revision c3566d06421c8acc0aafb18f7e307e5725ce87e1
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 <SkMatrix.h> 25#include <SkPaint.h> 26#include <SkRegion.h> 27#include <SkShader.h> 28#include <SkXfermode.h> 29 30#include <utils/Functor.h> 31#include <utils/RefBase.h> 32#include <utils/SortedVector.h> 33#include <utils/Vector.h> 34 35#include <cutils/compiler.h> 36 37#include "Debug.h" 38#include "Extensions.h" 39#include "Matrix.h" 40#include "Program.h" 41#include "Rect.h" 42#include "Snapshot.h" 43#include "Vertex.h" 44#include "SkiaShader.h" 45#include "SkiaColorFilter.h" 46#include "Caches.h" 47 48namespace android { 49namespace uirenderer { 50 51struct DrawModifiers { 52 SkiaShader* mShader; 53 SkiaColorFilter* mColorFilter; 54 55 // Drop shadow 56 bool mHasShadow; 57 float mShadowRadius; 58 float mShadowDx; 59 float mShadowDy; 60 int mShadowColor; 61 62 // Draw filters 63 bool mHasDrawFilter; 64 int mPaintFilterClearBits; 65 int mPaintFilterSetBits; 66}; 67 68struct DeferredDisplayState { 69 Rect mBounds; // local bounds, mapped with matrix to be in screen space coordinates, clipped. 70 int mMultipliedAlpha; // -1 if invalid (because caching not set) 71 72 // the below are set and used by the OpenGLRenderer at record and deferred playback 73 Rect mClip; 74 mat4 mMatrix; 75 SkiaShader* mShader; 76 DrawModifiers mDrawModifiers; 77}; 78 79/////////////////////////////////////////////////////////////////////////////// 80// Renderer 81/////////////////////////////////////////////////////////////////////////////// 82 83class DisplayList; 84class VertexBuffer; 85 86/** 87 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 88 * simplified version of Skia's Canvas API. 89 */ 90class OpenGLRenderer { 91public: 92 ANDROID_API OpenGLRenderer(); 93 virtual ~OpenGLRenderer(); 94 95 /** 96 * Sets the name of this renderer. The name is optional and 97 * empty by default. If the pointer is null the name is set 98 * to the empty string. 99 */ 100 ANDROID_API void setName(const char* name); 101 102 /** 103 * Returns the name of this renderer as UTF8 string. 104 * The returned pointer is never null. 105 */ 106 ANDROID_API const char* getName() const; 107 108 /** 109 * Read externally defined properties to control the behavior 110 * of the renderer. 111 */ 112 ANDROID_API void initProperties(); 113 114 /** 115 * Indicates whether this renderer executes drawing commands immediately. 116 * If this method returns true, the drawing commands will be executed 117 * later. 118 */ 119 virtual bool isDeferred(); 120 121 /** 122 * Sets the dimension of the underlying drawing surface. This method must 123 * be called at least once every time the drawing surface changes size. 124 * 125 * @param width The width in pixels of the underlysing surface 126 * @param height The height in pixels of the underlysing surface 127 */ 128 virtual void setViewport(int width, int height); 129 130 /** 131 * Prepares the renderer to draw a frame. This method must be invoked 132 * at the beginning of each frame. When this method is invoked, the 133 * entire drawing surface is assumed to be redrawn. 134 * 135 * @param opaque If true, the target surface is considered opaque 136 * and will not be cleared. If false, the target surface 137 * will be cleared 138 */ 139 ANDROID_API status_t prepare(bool opaque); 140 141 /** 142 * Prepares the renderer to draw a frame. This method must be invoked 143 * at the beginning of each frame. Only the specified rectangle of the 144 * frame is assumed to be dirty. A clip will automatically be set to 145 * the specified rectangle. 146 * 147 * @param left The left coordinate of the dirty rectangle 148 * @param top The top coordinate of the dirty rectangle 149 * @param right The right coordinate of the dirty rectangle 150 * @param bottom The bottom coordinate of the dirty rectangle 151 * @param opaque If true, the target surface is considered opaque 152 * and will not be cleared. If false, the target surface 153 * will be cleared in the specified dirty rectangle 154 */ 155 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 156 157 /** 158 * Indicates the end of a frame. This method must be invoked whenever 159 * the caller is done rendering a frame. 160 */ 161 virtual void finish(); 162 163 /** 164 * This method must be invoked before handing control over to a draw functor. 165 * See callDrawGLFunction() for instance. 166 * 167 * This command must not be recorded inside display lists. 168 */ 169 virtual void interrupt(); 170 171 /** 172 * This method must be invoked after getting control back from a draw functor. 173 * 174 * This command must not be recorded inside display lists. 175 */ 176 virtual void resume(); 177 178 ANDROID_API status_t invokeFunctors(Rect& dirty); 179 ANDROID_API void detachFunctor(Functor* functor); 180 ANDROID_API void attachFunctor(Functor* functor); 181 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 182 183 ANDROID_API void pushLayerUpdate(Layer* layer); 184 ANDROID_API void clearLayerUpdates(); 185 186 ANDROID_API int getSaveCount() const; 187 virtual int save(int flags); 188 virtual void restore(); 189 virtual void restoreToCount(int saveCount); 190 191 virtual int saveLayer(float left, float top, float right, float bottom, 192 SkPaint* p, int flags); 193 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 194 int alpha, int flags); 195 196 virtual void translate(float dx, float dy); 197 virtual void rotate(float degrees); 198 virtual void scale(float sx, float sy); 199 virtual void skew(float sx, float sy); 200 201 ANDROID_API void getMatrix(SkMatrix* matrix); 202 virtual void setMatrix(SkMatrix* matrix); 203 virtual void concatMatrix(SkMatrix* matrix); 204 205 ANDROID_API const Rect& getClipBounds(); 206 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 207 bool quickRejectNoScissor(float left, float top, float right, float bottom); 208 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 209 virtual bool clipPath(SkPath* path, SkRegion::Op op); 210 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 211 virtual Rect* getClipRect(); 212 213 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags); 214 virtual void outputDisplayList(DisplayList* displayList); 215 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 216 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 217 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 218 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 219 float srcRight, float srcBottom, float dstLeft, float dstTop, 220 float dstRight, float dstBottom, SkPaint* paint); 221 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 222 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 223 float* vertices, int* colors, SkPaint* paint); 224 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 225 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 226 float left, float top, float right, float bottom, SkPaint* paint); 227 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 228 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 229 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 230 virtual status_t drawColor(int color, SkXfermode::Mode mode); 231 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 232 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 233 float rx, float ry, SkPaint* paint); 234 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 235 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 236 virtual status_t drawArc(float left, float top, float right, float bottom, 237 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 238 virtual status_t drawPath(SkPath* path, SkPaint* paint); 239 virtual status_t drawLines(float* points, int count, SkPaint* paint); 240 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 241 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 242 float hOffset, float vOffset, SkPaint* paint); 243 virtual status_t drawPosText(const char* text, int bytesCount, int count, 244 const float* positions, SkPaint* paint); 245 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 246 const float* positions, SkPaint* paint, float length = -1.0f); 247 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 248 249 virtual void resetShader(); 250 virtual void setupShader(SkiaShader* shader); 251 252 virtual void resetColorFilter(); 253 virtual void setupColorFilter(SkiaColorFilter* filter); 254 255 virtual void resetShadow(); 256 virtual void setupShadow(float radius, float dx, float dy, int color); 257 258 virtual void resetPaintFilter(); 259 virtual void setupPaintFilter(int clearBits, int setBits); 260 261 SkPaint* filterPaint(SkPaint* paint); 262 263 bool disallowDeferral() { 264 // returns true if the OpenGLRenderer's state can be completely represented by 265 // a DeferredDisplayState object 266 return !mSnapshot->clipRegion->isEmpty() || 267 mSnapshot->alpha < 1.0 || 268 (mSnapshot->flags & Snapshot::kFlagIsLayer) || 269 (mSnapshot->flags & Snapshot::kFlagFboTarget); // ensure we're not in a layer 270 } 271 272 bool disallowReorder() { return mDrawReorderDisabled; } 273 274 bool storeDisplayState(DeferredDisplayState& state); 275 void restoreDisplayState(const DeferredDisplayState& state); 276 277 const DrawModifiers& getDrawModifiers() { return mDrawModifiers; } 278 void setDrawModifiers(const DrawModifiers& drawModifiers) { mDrawModifiers = drawModifiers; } 279 280 ANDROID_API bool isCurrentTransformSimple() { 281 return mSnapshot->transform->isSimple(); 282 } 283 284 /** 285 * Sets the alpha on the current snapshot. This alpha value will be modulated 286 * with other alpha values when drawing primitives. 287 */ 288 void setAlpha(float alpha) { 289 mSnapshot->alpha = alpha; 290 } 291 292 /** 293 * Inserts a named group marker in the stream of GL commands. This marker 294 * can be used by tools to group commands into logical groups. A call to 295 * this method must always be followed later on by a call to endMark(). 296 */ 297 void startMark(const char* name) const; 298 299 /** 300 * Closes the last group marker opened by startMark(). 301 */ 302 void endMark() const; 303 304 /** 305 * Gets the alpha and xfermode out of a paint object. If the paint is null 306 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 307 * not multiply the paint's alpha by the current snapshot's alpha. 308 * 309 * @param paint The paint to extract values from 310 * @param alpha Where to store the resulting alpha 311 * @param mode Where to store the resulting xfermode 312 */ 313 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 314 if (paint) { 315 *mode = getXfermode(paint->getXfermode()); 316 317 // Skia draws using the color's alpha channel if < 255 318 // Otherwise, it uses the paint's alpha 319 int color = paint->getColor(); 320 *alpha = (color >> 24) & 0xFF; 321 if (*alpha == 255) { 322 *alpha = paint->getAlpha(); 323 } 324 } else { 325 *mode = SkXfermode::kSrcOver_Mode; 326 *alpha = 255; 327 } 328 } 329 330protected: 331 /** 332 * Computes the projection matrix, initialize the first snapshot 333 * and stores the dimensions of the render target. 334 */ 335 void initViewport(int width, int height); 336 337 /** 338 * Clears the underlying surface if needed. 339 */ 340 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 341 342 /** 343 * Call this method after updating a layer during a drawing pass. 344 */ 345 void resumeAfterLayer(); 346 347 /** 348 * This method is called whenever a stencil buffer is required. Subclasses 349 * should override this method and call attachStencilBufferToLayer() on the 350 * appropriate layer(s). 351 */ 352 virtual void ensureStencilBuffer(); 353 354 /** 355 * Obtains a stencil render buffer (allocating it if necessary) and 356 * attaches it to the specified layer. 357 */ 358 void attachStencilBufferToLayer(Layer* layer); 359 360 /** 361 * Compose the layer defined in the current snapshot with the layer 362 * defined by the previous snapshot. 363 * 364 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 365 * 366 * @param curent The current snapshot containing the layer to compose 367 * @param previous The previous snapshot to compose the current layer with 368 */ 369 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 370 371 /** 372 * Marks the specified region as dirty at the specified bounds. 373 */ 374 void dirtyLayerUnchecked(Rect& bounds, Region* region); 375 376 /** 377 * Returns the current snapshot. 378 */ 379 sp<Snapshot> getSnapshot() { 380 return mSnapshot; 381 } 382 383 /** 384 * Returns the region of the current layer. 385 */ 386 virtual Region* getRegion() { 387 return mSnapshot->region; 388 } 389 390 /** 391 * Indicates whether rendering is currently targeted at a layer. 392 */ 393 virtual bool hasLayer() { 394 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 395 } 396 397 /** 398 * Returns the name of the FBO this renderer is rendering into. 399 */ 400 virtual GLint getTargetFbo() { 401 return 0; 402 } 403 404 /** 405 * Renders the specified layer as a textured quad. 406 * 407 * @param layer The layer to render 408 * @param rect The bounds of the layer 409 */ 410 void drawTextureLayer(Layer* layer, const Rect& rect); 411 412 /** 413 * Gets the alpha and xfermode out of a paint object. If the paint is null 414 * alpha will be 255 and the xfermode will be SRC_OVER. 415 * 416 * @param paint The paint to extract values from 417 * @param alpha Where to store the resulting alpha 418 * @param mode Where to store the resulting xfermode 419 */ 420 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 421 422 /** 423 * Safely retrieves the mode from the specified xfermode. If the specified 424 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 425 */ 426 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 427 SkXfermode::Mode resultMode; 428 if (!SkXfermode::AsMode(mode, &resultMode)) { 429 resultMode = SkXfermode::kSrcOver_Mode; 430 } 431 return resultMode; 432 } 433 434 /** 435 * Set to true to suppress error checks at the end of a frame. 436 */ 437 virtual bool suppressErrorChecks() { 438 return false; 439 } 440 441 Caches& getCaches() { 442 return mCaches; 443 } 444 445private: 446 /** 447 * Discards the content of the framebuffer if supported by the driver. 448 * This method should be called at the beginning of a frame to optimize 449 * rendering on some tiler architectures. 450 */ 451 void discardFramebuffer(float left, float top, float right, float bottom); 452 453 /** 454 * Ensures the state of the renderer is the same as the state of 455 * the GL context. 456 */ 457 void syncState(); 458 459 /** 460 * Tells the GPU what part of the screen is about to be redrawn. 461 * This method will use the clip rect that we started drawing the 462 * frame with. 463 * This method needs to be invoked every time getTargetFbo() is 464 * bound again. 465 */ 466 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 467 468 /** 469 * Tells the GPU what part of the screen is about to be redrawn. 470 * This method needs to be invoked every time getTargetFbo() is 471 * bound again. 472 */ 473 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 474 475 /** 476 * Tells the GPU that we are done drawing the frame or that we 477 * are switching to another render target. 478 */ 479 void endTiling(); 480 481 /** 482 * Saves the current state of the renderer as a new snapshot. 483 * The new snapshot is saved in mSnapshot and the previous snapshot 484 * is linked from mSnapshot->previous. 485 * 486 * @param flags The save flags; see SkCanvas for more information 487 * 488 * @return The new save count. This value can be passed to #restoreToCount() 489 */ 490 int saveSnapshot(int flags); 491 492 /** 493 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 494 * 495 * @return True if the clip was modified. 496 */ 497 bool restoreSnapshot(); 498 499 /** 500 * Sets the clipping rectangle using glScissor. The clip is defined by 501 * the current snapshot's clipRect member. 502 */ 503 void setScissorFromClip(); 504 505 /** 506 * Sets the clipping region using the stencil buffer. The clip region 507 * is defined by the current snapshot's clipRegion member. 508 */ 509 void setStencilFromClip(); 510 511 /** 512 * Performs a quick reject but does not affect the scissor. Returns 513 * the transformed rect to test and the current clip. 514 */ 515 bool quickRejectNoScissor(float left, float top, float right, float bottom, 516 Rect& transformed, Rect& clip); 517 518 /** 519 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 520 */ 521 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 522 523 /** 524 * Creates a new layer stored in the specified snapshot. 525 * 526 * @param snapshot The snapshot associated with the new layer 527 * @param left The left coordinate of the layer 528 * @param top The top coordinate of the layer 529 * @param right The right coordinate of the layer 530 * @param bottom The bottom coordinate of the layer 531 * @param alpha The translucency of the layer 532 * @param mode The blending mode of the layer 533 * @param flags The layer save flags 534 * @param previousFbo The name of the current framebuffer 535 * 536 * @return True if the layer was successfully created, false otherwise 537 */ 538 bool createLayer(float left, float top, float right, float bottom, 539 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 540 541 /** 542 * Creates a new layer stored in the specified snapshot as an FBO. 543 * 544 * @param layer The layer to store as an FBO 545 * @param snapshot The snapshot associated with the new layer 546 * @param bounds The bounds of the layer 547 * @param previousFbo The name of the current framebuffer 548 */ 549 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 550 551 /** 552 * Compose the specified layer as a region. 553 * 554 * @param layer The layer to compose 555 * @param rect The layer's bounds 556 */ 557 void composeLayerRegion(Layer* layer, const Rect& rect); 558 559 /** 560 * Compose the specified layer as a simple rectangle. 561 * 562 * @param layer The layer to compose 563 * @param rect The layer's bounds 564 * @param swap If true, the source and destination are swapped 565 */ 566 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 567 568 /** 569 * Clears all the regions corresponding to the current list of layers. 570 * This method MUST be invoked before any drawing operation. 571 */ 572 void clearLayerRegions(); 573 574 /** 575 * Mark the layer as dirty at the specified coordinates. The coordinates 576 * are transformed with the supplied matrix. 577 */ 578 void dirtyLayer(const float left, const float top, 579 const float right, const float bottom, const mat4 transform); 580 581 /** 582 * Mark the layer as dirty at the specified coordinates. 583 */ 584 void dirtyLayer(const float left, const float top, 585 const float right, const float bottom); 586 587 /** 588 * Draws a colored rectangle with the specified color. The specified coordinates 589 * are transformed by the current snapshot's transform matrix unless specified 590 * otherwise. 591 * 592 * @param left The left coordinate of the rectangle 593 * @param top The top coordinate of the rectangle 594 * @param right The right coordinate of the rectangle 595 * @param bottom The bottom coordinate of the rectangle 596 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 597 * @param mode The Skia xfermode to use 598 * @param ignoreTransform True if the current transform should be ignored 599 */ 600 void drawColorRect(float left, float top, float right, float bottom, 601 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 602 603 /** 604 * Draws a series of colored rectangles with the specified color. The specified 605 * coordinates are transformed by the current snapshot's transform matrix unless 606 * specified otherwise. 607 * 608 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 609 * per rectangle 610 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 611 * @param mode The Skia xfermode to use 612 * @param ignoreTransform True if the current transform should be ignored 613 * @param dirty True if calling this method should dirty the current layer 614 * @param clip True if the rects should be clipped, false otherwise 615 */ 616 status_t drawColorRects(const float* rects, int count, int color, 617 SkXfermode::Mode mode, bool ignoreTransform = false, 618 bool dirty = true, bool clip = true); 619 620 /** 621 * Draws the shape represented by the specified path texture. 622 * This method invokes drawPathTexture() but takes into account 623 * the extra left/top offset and the texture offset to correctly 624 * position the final shape. 625 * 626 * @param left The left coordinate of the shape to render 627 * @param top The top coordinate of the shape to render 628 * @param texture The texture reprsenting the shape 629 * @param paint The paint to draw the shape with 630 */ 631 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 632 633 /** 634 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 635 * different compositing rules. 636 * 637 * @param texture The texture to draw with 638 * @param left The x coordinate of the bitmap 639 * @param top The y coordinate of the bitmap 640 * @param paint The paint to render with 641 */ 642 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 643 644 /** 645 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 646 * 647 * @param vertexBuffer The VertexBuffer to be drawn 648 * @param paint The paint to render with 649 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 650 */ 651 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 652 bool useOffset = false); 653 654 /** 655 * Renders the convex hull defined by the specified path as a strip of polygons. 656 * 657 * @param path The hull of the path to draw 658 * @param paint The paint to render with 659 */ 660 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 661 662 /** 663 * Draws a textured rectangle with the specified texture. The specified coordinates 664 * are transformed by the current snapshot's transform matrix. 665 * 666 * @param left The left coordinate of the rectangle 667 * @param top The top coordinate of the rectangle 668 * @param right The right coordinate of the rectangle 669 * @param bottom The bottom coordinate of the rectangle 670 * @param texture The texture name to map onto the rectangle 671 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 672 * @param mode The blending mode 673 * @param blend True if the texture contains an alpha channel 674 */ 675 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 676 float alpha, SkXfermode::Mode mode, bool blend); 677 678 /** 679 * Draws a textured rectangle with the specified texture. The specified coordinates 680 * are transformed by the current snapshot's transform matrix. 681 * 682 * @param left The left coordinate of the rectangle 683 * @param top The top coordinate of the rectangle 684 * @param right The right coordinate of the rectangle 685 * @param bottom The bottom coordinate of the rectangle 686 * @param texture The texture to use 687 * @param paint The paint containing the alpha, blending mode, etc. 688 */ 689 void drawTextureRect(float left, float top, float right, float bottom, 690 Texture* texture, SkPaint* paint); 691 692 /** 693 * Draws a textured mesh with the specified texture. If the indices are omitted, 694 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 695 * VBO is bound. 696 * 697 * @param left The left coordinate of the rectangle 698 * @param top The top coordinate of the rectangle 699 * @param right The right coordinate of the rectangle 700 * @param bottom The bottom coordinate of the rectangle 701 * @param texture The texture name to map onto the rectangle 702 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 703 * @param mode The blending mode 704 * @param blend True if the texture contains an alpha channel 705 * @param vertices The vertices that define the mesh 706 * @param texCoords The texture coordinates of each vertex 707 * @param elementsCount The number of elements in the mesh, required by indices 708 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 709 * @param ignoreTransform True if the current transform should be ignored 710 * @param vbo The VBO used to draw the mesh 711 * @param ignoreScale True if the model view matrix should not be scaled 712 * @param dirty True if calling this method should dirty the current layer 713 */ 714 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 715 float alpha, SkXfermode::Mode mode, bool blend, 716 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 717 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 718 bool ignoreScale = false, bool dirty = true); 719 720 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 721 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 722 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 723 bool ignoreTransform, bool dirty = true); 724 725 /** 726 * Draws text underline and strike-through if needed. 727 * 728 * @param text The text to decor 729 * @param bytesCount The number of bytes in the text 730 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 731 * @param x The x coordinate where the text will be drawn 732 * @param y The y coordinate where the text will be drawn 733 * @param paint The paint to draw the text with 734 */ 735 void drawTextDecorations(const char* text, int bytesCount, float length, 736 float x, float y, SkPaint* paint); 737 738 /** 739 * Draws shadow layer on text (with optional positions). 740 * 741 * @param paint The paint to draw the shadow with 742 * @param text The text to draw 743 * @param bytesCount The number of bytes in the text 744 * @param count The number of glyphs in the text 745 * @param positions The x, y positions of individual glyphs (or NULL) 746 * @param fontRenderer The font renderer object 747 * @param alpha The alpha value for drawing the shadow 748 * @param mode The xfermode for drawing the shadow 749 * @param x The x coordinate where the shadow will be drawn 750 * @param y The y coordinate where the shadow will be drawn 751 */ 752 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 753 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 754 float x, float y); 755 756 /** 757 * Draws a path texture. Path textures are alpha8 bitmaps that need special 758 * compositing to apply colors/filters/etc. 759 * 760 * @param texture The texture to render 761 * @param x The x coordinate where the texture will be drawn 762 * @param y The y coordinate where the texture will be drawn 763 * @param paint The paint to draw the texture with 764 */ 765 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 766 767 /** 768 * Resets the texture coordinates stored in mMeshVertices. Setting the values 769 * back to default is achieved by calling: 770 * 771 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 772 * 773 * @param u1 The left coordinate of the texture 774 * @param v1 The bottom coordinate of the texture 775 * @param u2 The right coordinate of the texture 776 * @param v2 The top coordinate of the texture 777 */ 778 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 779 780 /** 781 * Binds the specified texture. The texture unit must have been selected 782 * prior to calling this method. 783 */ 784 inline void bindTexture(GLuint texture) { 785 glBindTexture(GL_TEXTURE_2D, texture); 786 } 787 788 /** 789 * Binds the specified EGLImage texture. The texture unit must have been selected 790 * prior to calling this method. 791 */ 792 inline void bindExternalTexture(GLuint texture) { 793 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 794 } 795 796 /** 797 * Enable or disable blending as necessary. This function sets the appropriate 798 * blend function based on the specified xfermode. 799 */ 800 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 801 bool swapSrcDst = false); 802 803 /** 804 * Use the specified program with the current GL context. If the program is already 805 * in use, it will not be bound again. If it is not in use, the current program is 806 * marked unused and the specified program becomes used and becomes the new 807 * current program. 808 * 809 * @param program The program to use 810 * 811 * @return true If the specified program was already in use, false otherwise. 812 */ 813 inline bool useProgram(Program* program); 814 815 /** 816 * Invoked before any drawing operation. This sets required state. 817 */ 818 void setupDraw(bool clear = true); 819 820 /** 821 * Various methods to setup OpenGL rendering. 822 */ 823 void setupDrawWithTexture(bool isAlpha8 = false); 824 void setupDrawWithTextureAndColor(bool isAlpha8 = false); 825 void setupDrawWithExternalTexture(); 826 void setupDrawNoTexture(); 827 void setupDrawAA(); 828 void setupDrawPoint(float pointSize); 829 void setupDrawColor(int color, int alpha); 830 void setupDrawColor(float r, float g, float b, float a); 831 void setupDrawAlpha8Color(int color, int alpha); 832 void setupDrawTextGamma(const SkPaint* paint); 833 void setupDrawShader(); 834 void setupDrawColorFilter(); 835 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 836 bool swapSrcDst = false); 837 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 838 bool swapSrcDst = false); 839 void setupDrawProgram(); 840 void setupDrawDirtyRegionsDisabled(); 841 void setupDrawModelViewIdentity(bool offset = false); 842 void setupDrawModelView(float left, float top, float right, float bottom, 843 bool ignoreTransform = false, bool ignoreModelView = false); 844 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 845 bool ignoreTransform = false); 846 void setupDrawPointUniforms(); 847 void setupDrawColorUniforms(); 848 void setupDrawPureColorUniforms(); 849 void setupDrawShaderIdentityUniforms(); 850 void setupDrawShaderUniforms(bool ignoreTransform = false); 851 void setupDrawColorFilterUniforms(); 852 void setupDrawSimpleMesh(); 853 void setupDrawTexture(GLuint texture); 854 void setupDrawExternalTexture(GLuint texture); 855 void setupDrawTextureTransform(); 856 void setupDrawTextureTransformUniforms(mat4& transform); 857 void setupDrawTextGammaUniforms(); 858 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 859 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords, GLvoid* colors); 860 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 861 void setupDrawVertices(GLvoid* vertices); 862 void finishDrawTexture(); 863 void accountForClear(SkXfermode::Mode mode); 864 865 bool updateLayer(Layer* layer, bool inFrame); 866 void updateLayers(); 867 868 /** 869 * Renders the specified region as a series of rectangles. This method 870 * is used for debugging only. 871 */ 872 void drawRegionRects(const Region& region); 873 874 /** 875 * Renders the specified region as a series of rectangles. The region 876 * must be in screen-space coordinates. 877 */ 878 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 879 bool dirty = false); 880 881 /** 882 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 883 * is turned on. 884 */ 885 void debugClip(); 886 887 void debugOverdraw(bool enable, bool clear); 888 void renderOverdraw(); 889 890 /** 891 * Should be invoked every time the glScissor is modified. 892 */ 893 inline void dirtyClip() { 894 mDirtyClip = true; 895 } 896 897 // Dimensions of the drawing surface 898 int mWidth, mHeight; 899 900 // Matrix used for ortho projection in shaders 901 mat4 mOrthoMatrix; 902 903 // Model-view matrix used to position/size objects 904 mat4 mModelView; 905 906 // Number of saved states 907 int mSaveCount; 908 // Base state 909 sp<Snapshot> mFirstSnapshot; 910 // Current state 911 sp<Snapshot> mSnapshot; 912 // State used to define the clipping region 913 sp<Snapshot> mTilingSnapshot; 914 915 // Used to draw textured quads 916 TextureVertex mMeshVertices[4]; 917 918 // shader, filters, and shadow 919 DrawModifiers mDrawModifiers; 920 SkPaint mFilteredPaint; 921 922 // Various caches 923 Caches& mCaches; 924 Extensions& mExtensions; 925 926 // List of rectangles to clear after saveLayer() is invoked 927 Vector<Rect*> mLayers; 928 // List of functors to invoke after a frame is drawn 929 SortedVector<Functor*> mFunctors; 930 // List of layers to update at the beginning of a frame 931 Vector<Layer*> mLayerUpdates; 932 933 // Indentity matrix 934 const mat4 mIdentity; 935 936 // Indicates whether the clip must be restored 937 bool mDirtyClip; 938 939 // The following fields are used to setup drawing 940 // Used to describe the shaders to generate 941 ProgramDescription mDescription; 942 // Color description 943 bool mColorSet; 944 float mColorA, mColorR, mColorG, mColorB; 945 // Indicates that the shader should get a color 946 bool mSetShaderColor; 947 // Current texture unit 948 GLuint mTextureUnit; 949 // Track dirty regions, true by default 950 bool mTrackDirtyRegions; 951 // Indicate whether we are drawing an opaque frame 952 bool mOpaqueFrame; 953 954 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 955 // Properties.h 956 bool mScissorOptimizationDisabled; 957 bool mDrawDeferDisabled; 958 bool mDrawReorderDisabled; 959 960 // No-ops start/endTiling when set 961 bool mSuppressTiling; 962 963 // Optional name of the renderer 964 String8 mName; 965 966 friend class DisplayListRenderer; 967 968}; // class OpenGLRenderer 969 970}; // namespace uirenderer 971}; // namespace android 972 973#endif // ANDROID_HWUI_OPENGL_RENDERER_H 974