OpenGLRenderer.h revision da8d8b9699fe8e9557389465007e333d3f03dcc1
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 51/////////////////////////////////////////////////////////////////////////////// 52// Renderer 53/////////////////////////////////////////////////////////////////////////////// 54 55class DisplayList; 56class VertexBuffer; 57 58/** 59 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 60 * simplified version of Skia's Canvas API. 61 */ 62class OpenGLRenderer { 63public: 64 ANDROID_API OpenGLRenderer(); 65 virtual ~OpenGLRenderer(); 66 67 /** 68 * Sets the name of this renderer. The name is optional and 69 * empty by default. If the pointer is null the name is set 70 * to the empty string. 71 */ 72 ANDROID_API void setName(const char* name); 73 74 /** 75 * Returns the name of this renderer as UTF8 string. 76 * The returned pointer is never null. 77 */ 78 ANDROID_API const char* getName() const; 79 80 /** 81 * Read externally defined properties to control the behavior 82 * of the renderer. 83 */ 84 ANDROID_API void initProperties(); 85 86 /** 87 * Indicates whether this renderer executes drawing commands immediately. 88 * If this method returns true, the drawing commands will be executed 89 * later. 90 */ 91 virtual bool isDeferred(); 92 93 /** 94 * Sets the dimension of the underlying drawing surface. This method must 95 * be called at least once every time the drawing surface changes size. 96 * 97 * @param width The width in pixels of the underlysing surface 98 * @param height The height in pixels of the underlysing surface 99 */ 100 virtual void setViewport(int width, int height); 101 102 /** 103 * Prepares the renderer to draw a frame. This method must be invoked 104 * at the beginning of each frame. When this method is invoked, the 105 * entire drawing surface is assumed to be redrawn. 106 * 107 * @param opaque If true, the target surface is considered opaque 108 * and will not be cleared. If false, the target surface 109 * will be cleared 110 */ 111 ANDROID_API status_t prepare(bool opaque); 112 113 /** 114 * Prepares the renderer to draw a frame. This method must be invoked 115 * at the beginning of each frame. Only the specified rectangle of the 116 * frame is assumed to be dirty. A clip will automatically be set to 117 * the specified rectangle. 118 * 119 * @param left The left coordinate of the dirty rectangle 120 * @param top The top coordinate of the dirty rectangle 121 * @param right The right coordinate of the dirty rectangle 122 * @param bottom The bottom coordinate of the dirty rectangle 123 * @param opaque If true, the target surface is considered opaque 124 * and will not be cleared. If false, the target surface 125 * will be cleared in the specified dirty rectangle 126 */ 127 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 128 129 /** 130 * Indicates the end of a frame. This method must be invoked whenever 131 * the caller is done rendering a frame. 132 */ 133 virtual void finish(); 134 135 /** 136 * This method must be invoked before handing control over to a draw functor. 137 * See callDrawGLFunction() for instance. 138 * 139 * This command must not be recorded inside display lists. 140 */ 141 virtual void interrupt(); 142 143 /** 144 * This method must be invoked after getting control back from a draw functor. 145 * 146 * This command must not be recorded inside display lists. 147 */ 148 virtual void resume(); 149 150 ANDROID_API status_t invokeFunctors(Rect& dirty); 151 ANDROID_API void detachFunctor(Functor* functor); 152 ANDROID_API void attachFunctor(Functor* functor); 153 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 154 155 ANDROID_API void pushLayerUpdate(Layer* layer); 156 ANDROID_API void clearLayerUpdates(); 157 158 ANDROID_API int getSaveCount() const; 159 virtual int save(int flags); 160 virtual void restore(); 161 virtual void restoreToCount(int saveCount); 162 163 virtual int saveLayer(float left, float top, float right, float bottom, 164 SkPaint* p, int flags); 165 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 166 int alpha, int flags); 167 168 virtual void translate(float dx, float dy); 169 virtual void rotate(float degrees); 170 virtual void scale(float sx, float sy); 171 virtual void skew(float sx, float sy); 172 173 ANDROID_API void getMatrix(SkMatrix* matrix); 174 virtual void setMatrix(SkMatrix* matrix); 175 virtual void concatMatrix(SkMatrix* matrix); 176 177 ANDROID_API const Rect& getClipBounds(); 178 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 179 bool quickRejectNoScissor(float left, float top, float right, float bottom); 180 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 181 virtual bool clipPath(SkPath* path, SkRegion::Op op); 182 virtual bool clipRegion(SkRegion* region, SkRegion::Op op); 183 virtual Rect* getClipRect(); 184 185 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 186 uint32_t level = 0); 187 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 188 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 189 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 190 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 191 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 192 float srcRight, float srcBottom, float dstLeft, float dstTop, 193 float dstRight, float dstBottom, SkPaint* paint); 194 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 195 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 196 float* vertices, int* colors, SkPaint* paint); 197 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 198 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 199 float left, float top, float right, float bottom, SkPaint* paint); 200 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 201 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 202 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 203 virtual status_t drawColor(int color, SkXfermode::Mode mode); 204 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 205 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 206 float rx, float ry, SkPaint* paint); 207 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 208 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 209 virtual status_t drawArc(float left, float top, float right, float bottom, 210 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 211 virtual status_t drawPath(SkPath* path, SkPaint* paint); 212 virtual status_t drawLines(float* points, int count, SkPaint* paint); 213 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 214 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 215 float hOffset, float vOffset, SkPaint* paint); 216 virtual status_t drawPosText(const char* text, int bytesCount, int count, 217 const float* positions, SkPaint* paint); 218 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 219 const float* positions, SkPaint* paint, float length = -1.0f); 220 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 221 222 virtual void resetShader(); 223 virtual void setupShader(SkiaShader* shader); 224 225 virtual void resetColorFilter(); 226 virtual void setupColorFilter(SkiaColorFilter* filter); 227 228 virtual void resetShadow(); 229 virtual void setupShadow(float radius, float dx, float dy, int color); 230 231 virtual void resetPaintFilter(); 232 virtual void setupPaintFilter(int clearBits, int setBits); 233 234 SkPaint* filterPaint(SkPaint* paint); 235 236 ANDROID_API bool isCurrentTransformSimple() { 237 return mSnapshot->transform->isSimple(); 238 } 239 240 /** 241 * Sets the alpha on the current snapshot. This alpha value will be modulated 242 * with other alpha values when drawing primitives. 243 */ 244 void setAlpha(float alpha) { 245 mSnapshot->alpha = alpha; 246 } 247 248 /** 249 * Inserts a named group marker in the stream of GL commands. This marker 250 * can be used by tools to group commands into logical groups. A call to 251 * this method must always be followed later on by a call to endMark(). 252 */ 253 void startMark(const char* name) const; 254 255 /** 256 * Closes the last group marker opened by startMark(). 257 */ 258 void endMark() const; 259 260 /** 261 * Gets the alpha and xfermode out of a paint object. If the paint is null 262 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 263 * not multiply the paint's alpha by the current snapshot's alpha. 264 * 265 * @param paint The paint to extract values from 266 * @param alpha Where to store the resulting alpha 267 * @param mode Where to store the resulting xfermode 268 */ 269 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 270 if (paint) { 271 *mode = getXfermode(paint->getXfermode()); 272 273 // Skia draws using the color's alpha channel if < 255 274 // Otherwise, it uses the paint's alpha 275 int color = paint->getColor(); 276 *alpha = (color >> 24) & 0xFF; 277 if (*alpha == 255) { 278 *alpha = paint->getAlpha(); 279 } 280 } else { 281 *mode = SkXfermode::kSrcOver_Mode; 282 *alpha = 255; 283 } 284 } 285 286protected: 287 /** 288 * Computes the projection matrix, initialize the first snapshot 289 * and stores the dimensions of the render target. 290 */ 291 void initViewport(int width, int height); 292 293 /** 294 * Clears the underlying surface if needed. 295 */ 296 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 297 298 /** 299 * Call this method after updating a layer during a drawing pass. 300 */ 301 void resumeAfterLayer(); 302 303 /** 304 * This method is called whenever a stencil buffer is required. Subclasses 305 * should override this method and call attachStencilBufferToLayer() on the 306 * appropriate layer(s). 307 */ 308 virtual void ensureStencilBuffer(); 309 310 /** 311 * Obtains a stencil render buffer (allocating it if necessary) and 312 * attaches it to the specified layer. 313 */ 314 void attachStencilBufferToLayer(Layer* layer); 315 316 /** 317 * Compose the layer defined in the current snapshot with the layer 318 * defined by the previous snapshot. 319 * 320 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 321 * 322 * @param curent The current snapshot containing the layer to compose 323 * @param previous The previous snapshot to compose the current layer with 324 */ 325 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 326 327 /** 328 * Marks the specified region as dirty at the specified bounds. 329 */ 330 void dirtyLayerUnchecked(Rect& bounds, Region* region); 331 332 /** 333 * Returns the current snapshot. 334 */ 335 sp<Snapshot> getSnapshot() { 336 return mSnapshot; 337 } 338 339 /** 340 * Returns the region of the current layer. 341 */ 342 virtual Region* getRegion() { 343 return mSnapshot->region; 344 } 345 346 /** 347 * Indicates whether rendering is currently targeted at a layer. 348 */ 349 virtual bool hasLayer() { 350 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 351 } 352 353 /** 354 * Returns the name of the FBO this renderer is rendering into. 355 */ 356 virtual GLint getTargetFbo() { 357 return 0; 358 } 359 360 /** 361 * Renders the specified layer as a textured quad. 362 * 363 * @param layer The layer to render 364 * @param rect The bounds of the layer 365 */ 366 void drawTextureLayer(Layer* layer, const Rect& rect); 367 368 /** 369 * Gets the alpha and xfermode out of a paint object. If the paint is null 370 * alpha will be 255 and the xfermode will be SRC_OVER. 371 * 372 * @param paint The paint to extract values from 373 * @param alpha Where to store the resulting alpha 374 * @param mode Where to store the resulting xfermode 375 */ 376 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 377 378 /** 379 * Safely retrieves the mode from the specified xfermode. If the specified 380 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 381 */ 382 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 383 SkXfermode::Mode resultMode; 384 if (!SkXfermode::AsMode(mode, &resultMode)) { 385 resultMode = SkXfermode::kSrcOver_Mode; 386 } 387 return resultMode; 388 } 389 390 /** 391 * Set to true to suppress error checks at the end of a frame. 392 */ 393 virtual bool suppressErrorChecks() { 394 return false; 395 } 396 397 Caches& getCaches() { 398 return mCaches; 399 } 400 401private: 402 /** 403 * Discards the content of the framebuffer if supported by the driver. 404 * This method should be called at the beginning of a frame to optimize 405 * rendering on some tiler architectures. 406 */ 407 void discardFramebuffer(float left, float top, float right, float bottom); 408 409 /** 410 * Ensures the state of the renderer is the same as the state of 411 * the GL context. 412 */ 413 void syncState(); 414 415 /** 416 * Tells the GPU what part of the screen is about to be redrawn. 417 * This method will use the clip rect that we started drawing the 418 * frame with. 419 * This method needs to be invoked every time getTargetFbo() is 420 * bound again. 421 */ 422 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 423 424 /** 425 * Tells the GPU what part of the screen is about to be redrawn. 426 * This method needs to be invoked every time getTargetFbo() is 427 * bound again. 428 */ 429 void startTiling(const Rect& clip, int windowHeight, bool opaque = false); 430 431 /** 432 * Tells the GPU that we are done drawing the frame or that we 433 * are switching to another render target. 434 */ 435 void endTiling(); 436 437 /** 438 * Saves the current state of the renderer as a new snapshot. 439 * The new snapshot is saved in mSnapshot and the previous snapshot 440 * is linked from mSnapshot->previous. 441 * 442 * @param flags The save flags; see SkCanvas for more information 443 * 444 * @return The new save count. This value can be passed to #restoreToCount() 445 */ 446 int saveSnapshot(int flags); 447 448 /** 449 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 450 * 451 * @return True if the clip was modified. 452 */ 453 bool restoreSnapshot(); 454 455 /** 456 * Sets the clipping rectangle using glScissor. The clip is defined by 457 * the current snapshot's clipRect member. 458 */ 459 void setScissorFromClip(); 460 461 /** 462 * Sets the clipping region using the stencil buffer. The clip region 463 * is defined by the current snapshot's clipRegion member. 464 */ 465 void setStencilFromClip(); 466 467 /** 468 * Performs a quick reject but does not affect the scissor. Returns 469 * the transformed rect to test and the current clip. 470 */ 471 bool quickRejectNoScissor(float left, float top, float right, float bottom, 472 Rect& transformed, Rect& clip); 473 474 /** 475 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 476 */ 477 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 478 479 /** 480 * Creates a new layer stored in the specified snapshot. 481 * 482 * @param snapshot The snapshot associated with the new layer 483 * @param left The left coordinate of the layer 484 * @param top The top coordinate of the layer 485 * @param right The right coordinate of the layer 486 * @param bottom The bottom coordinate of the layer 487 * @param alpha The translucency of the layer 488 * @param mode The blending mode of the layer 489 * @param flags The layer save flags 490 * @param previousFbo The name of the current framebuffer 491 * 492 * @return True if the layer was successfully created, false otherwise 493 */ 494 bool createLayer(float left, float top, float right, float bottom, 495 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 496 497 /** 498 * Creates a new layer stored in the specified snapshot as an FBO. 499 * 500 * @param layer The layer to store as an FBO 501 * @param snapshot The snapshot associated with the new layer 502 * @param bounds The bounds of the layer 503 * @param previousFbo The name of the current framebuffer 504 */ 505 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 506 507 /** 508 * Compose the specified layer as a region. 509 * 510 * @param layer The layer to compose 511 * @param rect The layer's bounds 512 */ 513 void composeLayerRegion(Layer* layer, const Rect& rect); 514 515 /** 516 * Compose the specified layer as a simple rectangle. 517 * 518 * @param layer The layer to compose 519 * @param rect The layer's bounds 520 * @param swap If true, the source and destination are swapped 521 */ 522 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 523 524 /** 525 * Clears all the regions corresponding to the current list of layers. 526 * This method MUST be invoked before any drawing operation. 527 */ 528 void clearLayerRegions(); 529 530 /** 531 * Mark the layer as dirty at the specified coordinates. The coordinates 532 * are transformed with the supplied matrix. 533 */ 534 void dirtyLayer(const float left, const float top, 535 const float right, const float bottom, const mat4 transform); 536 537 /** 538 * Mark the layer as dirty at the specified coordinates. 539 */ 540 void dirtyLayer(const float left, const float top, 541 const float right, const float bottom); 542 543 /** 544 * Draws a colored rectangle with the specified color. The specified coordinates 545 * are transformed by the current snapshot's transform matrix unless specified 546 * otherwise. 547 * 548 * @param left The left coordinate of the rectangle 549 * @param top The top coordinate of the rectangle 550 * @param right The right coordinate of the rectangle 551 * @param bottom The bottom coordinate of the rectangle 552 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 553 * @param mode The Skia xfermode to use 554 * @param ignoreTransform True if the current transform should be ignored 555 */ 556 void drawColorRect(float left, float top, float right, float bottom, 557 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 558 559 /** 560 * Draws a series of colored rectangles with the specified color. The specified 561 * coordinates are transformed by the current snapshot's transform matrix unless 562 * specified otherwise. 563 * 564 * @param rects A list of rectangles, 4 floats (left, top, right, bottom) 565 * per rectangle 566 * @param color The rectangles' ARGB color, defined as a packed 32 bits word 567 * @param mode The Skia xfermode to use 568 * @param ignoreTransform True if the current transform should be ignored 569 * @param dirty True if calling this method should dirty the current layer 570 * @param clip True if the rects should be clipped, false otherwise 571 */ 572 status_t drawColorRects(const float* rects, int count, int color, 573 SkXfermode::Mode mode, bool ignoreTransform = false, 574 bool dirty = true, bool clip = true); 575 576 /** 577 * Draws the shape represented by the specified path texture. 578 * This method invokes drawPathTexture() but takes into account 579 * the extra left/top offset and the texture offset to correctly 580 * position the final shape. 581 * 582 * @param left The left coordinate of the shape to render 583 * @param top The top coordinate of the shape to render 584 * @param texture The texture reprsenting the shape 585 * @param paint The paint to draw the shape with 586 */ 587 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 588 589 /** 590 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 591 * different compositing rules. 592 * 593 * @param texture The texture to draw with 594 * @param left The x coordinate of the bitmap 595 * @param top The y coordinate of the bitmap 596 * @param paint The paint to render with 597 */ 598 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 599 600 /** 601 * Renders a strip of polygons with the specified paint, used for tessellated geometry. 602 * 603 * @param vertexBuffer The VertexBuffer to be drawn 604 * @param paint The paint to render with 605 * @param useOffset Offset the vertexBuffer (used in drawing non-AA lines) 606 */ 607 status_t drawVertexBuffer(const VertexBuffer& vertexBuffer, SkPaint* paint, 608 bool useOffset = false); 609 610 /** 611 * Renders the convex hull defined by the specified path as a strip of polygons. 612 * 613 * @param path The hull of the path to draw 614 * @param paint The paint to render with 615 */ 616 status_t drawConvexPath(const SkPath& path, SkPaint* paint); 617 618 /** 619 * Draws a textured rectangle with the specified texture. The specified coordinates 620 * are transformed by the current snapshot's transform matrix. 621 * 622 * @param left The left coordinate of the rectangle 623 * @param top The top coordinate of the rectangle 624 * @param right The right coordinate of the rectangle 625 * @param bottom The bottom coordinate of the rectangle 626 * @param texture The texture name to map onto the rectangle 627 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 628 * @param mode The blending mode 629 * @param blend True if the texture contains an alpha channel 630 */ 631 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 632 float alpha, SkXfermode::Mode mode, bool blend); 633 634 /** 635 * Draws a textured rectangle with the specified texture. The specified coordinates 636 * are transformed by the current snapshot's transform matrix. 637 * 638 * @param left The left coordinate of the rectangle 639 * @param top The top coordinate of the rectangle 640 * @param right The right coordinate of the rectangle 641 * @param bottom The bottom coordinate of the rectangle 642 * @param texture The texture to use 643 * @param paint The paint containing the alpha, blending mode, etc. 644 */ 645 void drawTextureRect(float left, float top, float right, float bottom, 646 Texture* texture, SkPaint* paint); 647 648 /** 649 * Draws a textured mesh with the specified texture. If the indices are omitted, 650 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 651 * VBO is bound. 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 name to map onto the rectangle 658 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 659 * @param mode The blending mode 660 * @param blend True if the texture contains an alpha channel 661 * @param vertices The vertices that define the mesh 662 * @param texCoords The texture coordinates of each vertex 663 * @param elementsCount The number of elements in the mesh, required by indices 664 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 665 * @param ignoreTransform True if the current transform should be ignored 666 * @param vbo The VBO used to draw the mesh 667 * @param ignoreScale True if the model view matrix should not be scaled 668 * @param dirty True if calling this method should dirty the current layer 669 */ 670 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 671 float alpha, SkXfermode::Mode mode, bool blend, 672 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 673 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 674 bool ignoreScale = false, bool dirty = true); 675 676 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 677 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 678 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 679 bool ignoreTransform, bool dirty = true); 680 681 /** 682 * Draws text underline and strike-through if needed. 683 * 684 * @param text The text to decor 685 * @param bytesCount The number of bytes in the text 686 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 687 * @param x The x coordinate where the text will be drawn 688 * @param y The y coordinate where the text will be drawn 689 * @param paint The paint to draw the text with 690 */ 691 void drawTextDecorations(const char* text, int bytesCount, float length, 692 float x, float y, SkPaint* paint); 693 694 /** 695 * Draws shadow layer on text (with optional positions). 696 * 697 * @param paint The paint to draw the shadow with 698 * @param text The text to draw 699 * @param bytesCount The number of bytes in the text 700 * @param count The number of glyphs in the text 701 * @param positions The x, y positions of individual glyphs (or NULL) 702 * @param fontRenderer The font renderer object 703 * @param alpha The alpha value for drawing the shadow 704 * @param mode The xfermode for drawing the shadow 705 * @param x The x coordinate where the shadow will be drawn 706 * @param y The y coordinate where the shadow will be drawn 707 */ 708 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 709 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 710 float x, float y); 711 712 /** 713 * Draws a path texture. Path textures are alpha8 bitmaps that need special 714 * compositing to apply colors/filters/etc. 715 * 716 * @param texture The texture to render 717 * @param x The x coordinate where the texture will be drawn 718 * @param y The y coordinate where the texture will be drawn 719 * @param paint The paint to draw the texture with 720 */ 721 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 722 723 /** 724 * Resets the texture coordinates stored in mMeshVertices. Setting the values 725 * back to default is achieved by calling: 726 * 727 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 728 * 729 * @param u1 The left coordinate of the texture 730 * @param v1 The bottom coordinate of the texture 731 * @param u2 The right coordinate of the texture 732 * @param v2 The top coordinate of the texture 733 */ 734 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 735 736 /** 737 * Binds the specified texture. The texture unit must have been selected 738 * prior to calling this method. 739 */ 740 inline void bindTexture(GLuint texture) { 741 glBindTexture(GL_TEXTURE_2D, texture); 742 } 743 744 /** 745 * Binds the specified EGLImage texture. The texture unit must have been selected 746 * prior to calling this method. 747 */ 748 inline void bindExternalTexture(GLuint texture) { 749 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 750 } 751 752 /** 753 * Enable or disable blending as necessary. This function sets the appropriate 754 * blend function based on the specified xfermode. 755 */ 756 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 757 bool swapSrcDst = false); 758 759 /** 760 * Use the specified program with the current GL context. If the program is already 761 * in use, it will not be bound again. If it is not in use, the current program is 762 * marked unused and the specified program becomes used and becomes the new 763 * current program. 764 * 765 * @param program The program to use 766 * 767 * @return true If the specified program was already in use, false otherwise. 768 */ 769 inline bool useProgram(Program* program); 770 771 /** 772 * Invoked before any drawing operation. This sets required state. 773 */ 774 void setupDraw(bool clear = true); 775 776 /** 777 * Various methods to setup OpenGL rendering. 778 */ 779 void setupDrawWithTexture(bool isAlpha8 = false); 780 void setupDrawWithExternalTexture(); 781 void setupDrawNoTexture(); 782 void setupDrawAA(); 783 void setupDrawPoint(float pointSize); 784 void setupDrawColor(int color, int alpha); 785 void setupDrawColor(float r, float g, float b, float a); 786 void setupDrawAlpha8Color(int color, int alpha); 787 void setupDrawTextGamma(const SkPaint* paint); 788 void setupDrawShader(); 789 void setupDrawColorFilter(); 790 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 791 bool swapSrcDst = false); 792 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 793 bool swapSrcDst = false); 794 void setupDrawProgram(); 795 void setupDrawDirtyRegionsDisabled(); 796 void setupDrawModelViewIdentity(bool offset = false); 797 void setupDrawModelView(float left, float top, float right, float bottom, 798 bool ignoreTransform = false, bool ignoreModelView = false); 799 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 800 bool ignoreTransform = false); 801 void setupDrawPointUniforms(); 802 void setupDrawColorUniforms(); 803 void setupDrawPureColorUniforms(); 804 void setupDrawShaderIdentityUniforms(); 805 void setupDrawShaderUniforms(bool ignoreTransform = false); 806 void setupDrawColorFilterUniforms(); 807 void setupDrawSimpleMesh(); 808 void setupDrawTexture(GLuint texture); 809 void setupDrawExternalTexture(GLuint texture); 810 void setupDrawTextureTransform(); 811 void setupDrawTextureTransformUniforms(mat4& transform); 812 void setupDrawTextGammaUniforms(); 813 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 814 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 815 void setupDrawVertices(GLvoid* vertices); 816 void finishDrawTexture(); 817 void accountForClear(SkXfermode::Mode mode); 818 819 bool updateLayer(Layer* layer, bool inFrame); 820 void updateLayers(); 821 822 /** 823 * Renders the specified region as a series of rectangles. This method 824 * is used for debugging only. 825 */ 826 void drawRegionRects(const Region& region); 827 828 /** 829 * Renders the specified region as a series of rectangles. The region 830 * must be in screen-space coordinates. 831 */ 832 void drawRegionRects(const SkRegion& region, int color, SkXfermode::Mode mode, 833 bool dirty = false); 834 835 /** 836 * Draws the current clip region if any. Only when DEBUG_CLIP_REGIONS 837 * is turned on. 838 */ 839 void debugClip(); 840 841 void debugOverdraw(bool enable, bool clear); 842 void renderOverdraw(); 843 844 /** 845 * Should be invoked every time the glScissor is modified. 846 */ 847 inline void dirtyClip() { 848 mDirtyClip = true; 849 } 850 851 // Dimensions of the drawing surface 852 int mWidth, mHeight; 853 854 // Matrix used for ortho projection in shaders 855 mat4 mOrthoMatrix; 856 857 // Model-view matrix used to position/size objects 858 mat4 mModelView; 859 860 // Number of saved states 861 int mSaveCount; 862 // Base state 863 sp<Snapshot> mFirstSnapshot; 864 // Current state 865 sp<Snapshot> mSnapshot; 866 // State used to define the clipping region 867 sp<Snapshot> mTilingSnapshot; 868 869 // Shaders 870 SkiaShader* mShader; 871 872 // Color filters 873 SkiaColorFilter* mColorFilter; 874 875 // Used to draw textured quads 876 TextureVertex mMeshVertices[4]; 877 878 // Drop shadow 879 bool mHasShadow; 880 float mShadowRadius; 881 float mShadowDx; 882 float mShadowDy; 883 int mShadowColor; 884 885 // Draw filters 886 bool mHasDrawFilter; 887 int mPaintFilterClearBits; 888 int mPaintFilterSetBits; 889 SkPaint mFilteredPaint; 890 891 // Various caches 892 Caches& mCaches; 893 Extensions& mExtensions; 894 895 // List of rectangles to clear after saveLayer() is invoked 896 Vector<Rect*> mLayers; 897 // List of functors to invoke after a frame is drawn 898 SortedVector<Functor*> mFunctors; 899 // List of layers to update at the beginning of a frame 900 Vector<Layer*> mLayerUpdates; 901 902 // Indentity matrix 903 const mat4 mIdentity; 904 905 // Indicates whether the clip must be restored 906 bool mDirtyClip; 907 908 // The following fields are used to setup drawing 909 // Used to describe the shaders to generate 910 ProgramDescription mDescription; 911 // Color description 912 bool mColorSet; 913 float mColorA, mColorR, mColorG, mColorB; 914 // Indicates that the shader should get a color 915 bool mSetShaderColor; 916 // Current texture unit 917 GLuint mTextureUnit; 918 // Track dirty regions, true by default 919 bool mTrackDirtyRegions; 920 // Indicate whether we are drawing an opaque frame 921 bool mOpaqueFrame; 922 923 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 924 // Properties.h 925 bool mScissorOptimizationDisabled; 926 927 // No-ops start/endTiling when set 928 bool mSuppressTiling; 929 930 // Optional name of the renderer 931 String8 mName; 932 933 friend class DisplayListRenderer; 934 935}; // class OpenGLRenderer 936 937}; // namespace uirenderer 938}; // namespace android 939 940#endif // ANDROID_HWUI_OPENGL_RENDERER_H 941