OpenGLRenderer.h revision 54c1a64d5441a964890b44280e4457e11f4f924a
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; 56 57/** 58 * OpenGL renderer used to draw accelerated 2D graphics. The API is a 59 * simplified version of Skia's Canvas API. 60 */ 61class OpenGLRenderer { 62public: 63 ANDROID_API OpenGLRenderer(); 64 virtual ~OpenGLRenderer(); 65 66 /** 67 * Read externally defined properties to control the behavior 68 * of the renderer. 69 */ 70 ANDROID_API void initProperties(); 71 72 /** 73 * Indicates whether this renderer executes drawing commands immediately. 74 * If this method returns true, the drawing commands will be executed 75 * later. 76 */ 77 virtual bool isDeferred(); 78 79 /** 80 * Sets the dimension of the underlying drawing surface. This method must 81 * be called at least once every time the drawing surface changes size. 82 * 83 * @param width The width in pixels of the underlysing surface 84 * @param height The height in pixels of the underlysing surface 85 */ 86 virtual void setViewport(int width, int height); 87 88 /** 89 * Prepares the renderer to draw a frame. This method must be invoked 90 * at the beginning of each frame. When this method is invoked, the 91 * entire drawing surface is assumed to be redrawn. 92 * 93 * @param opaque If true, the target surface is considered opaque 94 * and will not be cleared. If false, the target surface 95 * will be cleared 96 */ 97 ANDROID_API int prepare(bool opaque); 98 99 /** 100 * Prepares the renderer to draw a frame. This method must be invoked 101 * at the beginning of each frame. Only the specified rectangle of the 102 * frame is assumed to be dirty. A clip will automatically be set to 103 * the specified rectangle. 104 * 105 * @param left The left coordinate of the dirty rectangle 106 * @param top The top coordinate of the dirty rectangle 107 * @param right The right coordinate of the dirty rectangle 108 * @param bottom The bottom coordinate of the dirty rectangle 109 * @param opaque If true, the target surface is considered opaque 110 * and will not be cleared. If false, the target surface 111 * will be cleared in the specified dirty rectangle 112 */ 113 virtual int prepareDirty(float left, float top, float right, float bottom, bool opaque); 114 115 /** 116 * Indicates the end of a frame. This method must be invoked whenever 117 * the caller is done rendering a frame. 118 */ 119 virtual void finish(); 120 121 /** 122 * This method must be invoked before handing control over to a draw functor. 123 * See callDrawGLFunction() for instance. 124 * 125 * This command must not be recorded inside display lists. 126 */ 127 virtual void interrupt(); 128 129 /** 130 * This method must be invoked after getting control back from a draw functor. 131 * 132 * This command must not be recorded inside display lists. 133 */ 134 virtual void resume(); 135 136 ANDROID_API status_t invokeFunctors(Rect& dirty); 137 ANDROID_API void detachFunctor(Functor* functor); 138 ANDROID_API void attachFunctor(Functor* functor); 139 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 140 141 ANDROID_API void pushLayerUpdate(Layer* layer); 142 ANDROID_API void clearLayerUpdates(); 143 144 ANDROID_API int getSaveCount() const; 145 virtual int save(int flags); 146 virtual void restore(); 147 virtual void restoreToCount(int saveCount); 148 149 virtual int saveLayer(float left, float top, float right, float bottom, 150 SkPaint* p, int flags); 151 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 152 int alpha, int flags); 153 154 virtual void translate(float dx, float dy); 155 virtual void rotate(float degrees); 156 virtual void scale(float sx, float sy); 157 virtual void skew(float sx, float sy); 158 159 ANDROID_API void getMatrix(SkMatrix* matrix); 160 virtual void setMatrix(SkMatrix* matrix); 161 virtual void concatMatrix(SkMatrix* matrix); 162 163 ANDROID_API const Rect& getClipBounds(); 164 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 165 bool quickRejectNoScissor(float left, float top, float right, float bottom); 166 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 167 virtual Rect* getClipRect(); 168 169 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 170 uint32_t level = 0); 171 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 172 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 173 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 174 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 175 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 176 float srcRight, float srcBottom, float dstLeft, float dstTop, 177 float dstRight, float dstBottom, SkPaint* paint); 178 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 179 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 180 float* vertices, int* colors, SkPaint* paint); 181 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 182 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 183 float left, float top, float right, float bottom, SkPaint* paint); 184 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 185 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 186 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 187 virtual status_t drawColor(int color, SkXfermode::Mode mode); 188 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 189 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 190 float rx, float ry, SkPaint* paint); 191 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 192 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 193 virtual status_t drawArc(float left, float top, float right, float bottom, 194 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 195 virtual status_t drawPath(SkPath* path, SkPaint* paint); 196 virtual status_t drawLines(float* points, int count, SkPaint* paint); 197 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 198 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 199 float hOffset, float vOffset, SkPaint* paint); 200 virtual status_t drawPosText(const char* text, int bytesCount, int count, 201 const float* positions, SkPaint* paint); 202 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 203 const float* positions, SkPaint* paint, float length = -1.0f); 204 205 virtual void resetShader(); 206 virtual void setupShader(SkiaShader* shader); 207 208 virtual void resetColorFilter(); 209 virtual void setupColorFilter(SkiaColorFilter* filter); 210 211 virtual void resetShadow(); 212 virtual void setupShadow(float radius, float dx, float dy, int color); 213 214 virtual void resetPaintFilter(); 215 virtual void setupPaintFilter(int clearBits, int setBits); 216 217 SkPaint* filterPaint(SkPaint* paint); 218 219 /** 220 * Sets the alpha on the current snapshot. This alpha value will be modulated 221 * with other alpha values when drawing primitives. 222 */ 223 void setAlpha(float alpha) { 224 mSnapshot->alpha = alpha; 225 } 226 227 /** 228 * Inserts a named group marker in the stream of GL commands. This marker 229 * can be used by tools to group commands into logical groups. A call to 230 * this method must always be followed later on by a call to endMark(). 231 */ 232 void startMark(const char* name) const; 233 234 /** 235 * Closes the last group marker opened by startMark(). 236 */ 237 void endMark() const; 238 239 /** 240 * Gets the alpha and xfermode out of a paint object. If the paint is null 241 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 242 * not multiply the paint's alpha by the current snapshot's alpha. 243 * 244 * @param paint The paint to extract values from 245 * @param alpha Where to store the resulting alpha 246 * @param mode Where to store the resulting xfermode 247 */ 248 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 249 if (paint) { 250 *mode = getXfermode(paint->getXfermode()); 251 252 // Skia draws using the color's alpha channel if < 255 253 // Otherwise, it uses the paint's alpha 254 int color = paint->getColor(); 255 *alpha = (color >> 24) & 0xFF; 256 if (*alpha == 255) { 257 *alpha = paint->getAlpha(); 258 } 259 } else { 260 *mode = SkXfermode::kSrcOver_Mode; 261 *alpha = 255; 262 } 263 } 264 265protected: 266 /** 267 * Computes the projection matrix, initialize the first snapshot 268 * and stores the dimensions of the render target. 269 */ 270 void initViewport(int width, int height); 271 272 /** 273 * Call this method after updating a layer during a drawing pass. 274 */ 275 void resumeAfterLayer(); 276 277 /** 278 * Compose the layer defined in the current snapshot with the layer 279 * defined by the previous snapshot. 280 * 281 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 282 * 283 * @param curent The current snapshot containing the layer to compose 284 * @param previous The previous snapshot to compose the current layer with 285 */ 286 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 287 288 /** 289 * Marks the specified region as dirty at the specified bounds. 290 */ 291 void dirtyLayerUnchecked(Rect& bounds, Region* region); 292 293 /** 294 * Returns the current snapshot. 295 */ 296 sp<Snapshot> getSnapshot() { 297 return mSnapshot; 298 } 299 300 /** 301 * Returns the region of the current layer. 302 */ 303 virtual Region* getRegion() { 304 return mSnapshot->region; 305 } 306 307 /** 308 * Indicates whether rendering is currently targeted at a layer. 309 */ 310 virtual bool hasLayer() { 311 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 312 } 313 314 /** 315 * Returns the name of the FBO this renderer is rendering into. 316 */ 317 virtual GLint getTargetFbo() { 318 return 0; 319 } 320 321 /** 322 * Renders the specified layer as a textured quad. 323 * 324 * @param layer The layer to render 325 * @param rect The bounds of the layer 326 */ 327 void drawTextureLayer(Layer* layer, const Rect& rect); 328 329 /** 330 * Gets the alpha and xfermode out of a paint object. If the paint is null 331 * alpha will be 255 and the xfermode will be SRC_OVER. 332 * 333 * @param paint The paint to extract values from 334 * @param alpha Where to store the resulting alpha 335 * @param mode Where to store the resulting xfermode 336 */ 337 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 338 339 /** 340 * Safely retrieves the mode from the specified xfermode. If the specified 341 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 342 */ 343 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 344 SkXfermode::Mode resultMode; 345 if (!SkXfermode::AsMode(mode, &resultMode)) { 346 resultMode = SkXfermode::kSrcOver_Mode; 347 } 348 return resultMode; 349 } 350 351 /** 352 * Set to true to suppress error checks at the end of a frame. 353 */ 354 virtual bool suppressErrorChecks() { 355 return false; 356 } 357 358private: 359 /** 360 * Ensures the state of the renderer is the same as the state of 361 * the GL context. 362 */ 363 void syncState(); 364 365 /** 366 * Tells the GPU what part of the screen is about to be redrawn. 367 * This method needs to be invoked every time getTargetFbo() is 368 * bound again. 369 */ 370 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 371 372 /** 373 * Tells the GPU that we are done drawing the frame or that we 374 * are switching to another render target. 375 */ 376 void endTiling(); 377 378 /** 379 * Saves the current state of the renderer as a new snapshot. 380 * The new snapshot is saved in mSnapshot and the previous snapshot 381 * is linked from mSnapshot->previous. 382 * 383 * @param flags The save flags; see SkCanvas for more information 384 * 385 * @return The new save count. This value can be passed to #restoreToCount() 386 */ 387 int saveSnapshot(int flags); 388 389 /** 390 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 391 * 392 * @return True if the clip was modified. 393 */ 394 bool restoreSnapshot(); 395 396 /** 397 * Sets the clipping rectangle using glScissor. The clip is defined by 398 * the current snapshot's clipRect member. 399 */ 400 void setScissorFromClip(); 401 402 /** 403 * Performs a quick reject but does not affect the scissor. Returns 404 * the transformed rect to test and the current clip. 405 */ 406 bool quickRejectNoScissor(float left, float top, float right, float bottom, 407 Rect& transformed, Rect& clip); 408 409 /** 410 * Creates a new layer stored in the specified snapshot. 411 * 412 * @param snapshot The snapshot associated with the new layer 413 * @param left The left coordinate of the layer 414 * @param top The top coordinate of the layer 415 * @param right The right coordinate of the layer 416 * @param bottom The bottom coordinate of the layer 417 * @param alpha The translucency of the layer 418 * @param mode The blending mode of the layer 419 * @param flags The layer save flags 420 * @param previousFbo The name of the current framebuffer 421 * 422 * @return True if the layer was successfully created, false otherwise 423 */ 424 bool createLayer(float left, float top, float right, float bottom, 425 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 426 427 /** 428 * Creates a new layer stored in the specified snapshot as an FBO. 429 * 430 * @param layer The layer to store as an FBO 431 * @param snapshot The snapshot associated with the new layer 432 * @param bounds The bounds of the layer 433 * @param previousFbo The name of the current framebuffer 434 */ 435 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 436 437 /** 438 * Compose the specified layer as a region. 439 * 440 * @param layer The layer to compose 441 * @param rect The layer's bounds 442 */ 443 void composeLayerRegion(Layer* layer, const Rect& rect); 444 445 /** 446 * Compose the specified layer as a simple rectangle. 447 * 448 * @param layer The layer to compose 449 * @param rect The layer's bounds 450 * @param swap If true, the source and destination are swapped 451 */ 452 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 453 454 /** 455 * Clears all the regions corresponding to the current list of layers. 456 * This method MUST be invoked before any drawing operation. 457 */ 458 void clearLayerRegions(); 459 460 /** 461 * Mark the layer as dirty at the specified coordinates. The coordinates 462 * are transformed with the supplied matrix. 463 */ 464 void dirtyLayer(const float left, const float top, 465 const float right, const float bottom, const mat4 transform); 466 467 /** 468 * Mark the layer as dirty at the specified coordinates. 469 */ 470 void dirtyLayer(const float left, const float top, 471 const float right, const float bottom); 472 473 /** 474 * Draws a colored rectangle with the specified color. The specified coordinates 475 * are transformed by the current snapshot's transform matrix. 476 * 477 * @param left The left coordinate of the rectangle 478 * @param top The top coordinate of the rectangle 479 * @param right The right coordinate of the rectangle 480 * @param bottom The bottom coordinate of the rectangle 481 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 482 * @param mode The Skia xfermode to use 483 * @param ignoreTransform True if the current transform should be ignored 484 */ 485 void drawColorRect(float left, float top, float right, float bottom, 486 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 487 488 /** 489 * Draws the shape represented by the specified path texture. 490 * This method invokes drawPathTexture() but takes into account 491 * the extra left/top offset and the texture offset to correctly 492 * position the final shape. 493 * 494 * @param left The left coordinate of the shape to render 495 * @param top The top coordinate of the shape to render 496 * @param texture The texture reprsenting the shape 497 * @param paint The paint to draw the shape with 498 */ 499 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 500 501 /** 502 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 503 * different compositing rules. 504 * 505 * @param texture The texture to draw with 506 * @param left The x coordinate of the bitmap 507 * @param top The y coordinate of the bitmap 508 * @param paint The paint to render with 509 */ 510 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 511 512 /** 513 * Renders the convex hull defined by the specified path as a strip of polygons. 514 * 515 * @param path The hull of the path to draw 516 * @param color The color of the rect 517 * @param mode The blending mode to draw the path 518 * @param isAA True if the drawing should be anti-aliased 519 */ 520 void drawConvexPath(const SkPath& path, int color, SkXfermode::Mode mode, bool isAA); 521 522 /** 523 * Draws a textured rectangle with the specified texture. The specified coordinates 524 * are transformed by the current snapshot's transform matrix. 525 * 526 * @param left The left coordinate of the rectangle 527 * @param top The top coordinate of the rectangle 528 * @param right The right coordinate of the rectangle 529 * @param bottom The bottom coordinate of the rectangle 530 * @param texture The texture name to map onto the rectangle 531 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 532 * @param mode The blending mode 533 * @param blend True if the texture contains an alpha channel 534 */ 535 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 536 float alpha, SkXfermode::Mode mode, bool blend); 537 538 /** 539 * Draws a textured rectangle with the specified texture. The specified coordinates 540 * are transformed by the current snapshot's transform matrix. 541 * 542 * @param left The left coordinate of the rectangle 543 * @param top The top coordinate of the rectangle 544 * @param right The right coordinate of the rectangle 545 * @param bottom The bottom coordinate of the rectangle 546 * @param texture The texture to use 547 * @param paint The paint containing the alpha, blending mode, etc. 548 */ 549 void drawTextureRect(float left, float top, float right, float bottom, 550 Texture* texture, SkPaint* paint); 551 552 /** 553 * Draws a textured mesh with the specified texture. If the indices are omitted, 554 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 555 * VBO is bound. 556 * 557 * @param left The left coordinate of the rectangle 558 * @param top The top coordinate of the rectangle 559 * @param right The right coordinate of the rectangle 560 * @param bottom The bottom coordinate of the rectangle 561 * @param texture The texture name to map onto the rectangle 562 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 563 * @param mode The blending mode 564 * @param blend True if the texture contains an alpha channel 565 * @param vertices The vertices that define the mesh 566 * @param texCoords The texture coordinates of each vertex 567 * @param elementsCount The number of elements in the mesh, required by indices 568 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 569 * @param ignoreTransform True if the current transform should be ignored 570 * @param vbo The VBO used to draw the mesh 571 * @param ignoreScale True if the model view matrix should not be scaled 572 * @param dirty True if calling this method should dirty the current layer 573 */ 574 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 575 float alpha, SkXfermode::Mode mode, bool blend, 576 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 577 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 578 bool ignoreScale = false, bool dirty = true); 579 580 /** 581 * Draws text underline and strike-through if needed. 582 * 583 * @param text The text to decor 584 * @param bytesCount The number of bytes in the text 585 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 586 * @param x The x coordinate where the text will be drawn 587 * @param y The y coordinate where the text will be drawn 588 * @param paint The paint to draw the text with 589 */ 590 void drawTextDecorations(const char* text, int bytesCount, float length, 591 float x, float y, SkPaint* paint); 592 593 /** 594 * Draws shadow layer on text (with optional positions). 595 * 596 * @param paint The paint to draw the shadow with 597 * @param text The text to draw 598 * @param bytesCount The number of bytes in the text 599 * @param count The number of glyphs in the text 600 * @param positions The x, y positions of individual glyphs (or NULL) 601 * @param fontRenderer The font renderer object 602 * @param alpha The alpha value for drawing the shadow 603 * @param mode The xfermode for drawing the shadow 604 * @param x The x coordinate where the shadow will be drawn 605 * @param y The y coordinate where the shadow will be drawn 606 */ 607 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 608 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 609 float x, float y); 610 611 /** 612 * Draws a path texture. Path textures are alpha8 bitmaps that need special 613 * compositing to apply colors/filters/etc. 614 * 615 * @param texture The texture to render 616 * @param x The x coordinate where the texture will be drawn 617 * @param y The y coordinate where the texture will be drawn 618 * @param paint The paint to draw the texture with 619 */ 620 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 621 622 /** 623 * Resets the texture coordinates stored in mMeshVertices. Setting the values 624 * back to default is achieved by calling: 625 * 626 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 627 * 628 * @param u1 The left coordinate of the texture 629 * @param v1 The bottom coordinate of the texture 630 * @param u2 The right coordinate of the texture 631 * @param v2 The top coordinate of the texture 632 */ 633 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 634 635 /** 636 * Binds the specified texture. The texture unit must have been selected 637 * prior to calling this method. 638 */ 639 inline void bindTexture(GLuint texture) { 640 glBindTexture(GL_TEXTURE_2D, texture); 641 } 642 643 /** 644 * Binds the specified EGLImage texture. The texture unit must have been selected 645 * prior to calling this method. 646 */ 647 inline void bindExternalTexture(GLuint texture) { 648 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 649 } 650 651 /** 652 * Enable or disable blending as necessary. This function sets the appropriate 653 * blend function based on the specified xfermode. 654 */ 655 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 656 bool swapSrcDst = false); 657 658 /** 659 * Use the specified program with the current GL context. If the program is already 660 * in use, it will not be bound again. If it is not in use, the current program is 661 * marked unused and the specified program becomes used and becomes the new 662 * current program. 663 * 664 * @param program The program to use 665 * 666 * @return true If the specified program was already in use, false otherwise. 667 */ 668 inline bool useProgram(Program* program); 669 670 /** 671 * Invoked before any drawing operation. This sets required state. 672 */ 673 void setupDraw(bool clear = true); 674 675 /** 676 * Various methods to setup OpenGL rendering. 677 */ 678 void setupDrawWithTexture(bool isAlpha8 = false); 679 void setupDrawWithExternalTexture(); 680 void setupDrawNoTexture(); 681 void setupDrawAA(); 682 void setupDrawVertexShape(); 683 void setupDrawPoint(float pointSize); 684 void setupDrawColor(int color); 685 void setupDrawColor(int color, int alpha); 686 void setupDrawColor(float r, float g, float b, float a); 687 void setupDrawAlpha8Color(int color, int alpha); 688 void setupDrawTextGamma(const SkPaint* paint); 689 void setupDrawShader(); 690 void setupDrawColorFilter(); 691 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 692 bool swapSrcDst = false); 693 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 694 bool swapSrcDst = false); 695 void setupDrawProgram(); 696 void setupDrawDirtyRegionsDisabled(); 697 void setupDrawModelViewIdentity(bool offset = false); 698 void setupDrawModelView(float left, float top, float right, float bottom, 699 bool ignoreTransform = false, bool ignoreModelView = false); 700 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 701 bool ignoreTransform = false); 702 void setupDrawPointUniforms(); 703 void setupDrawColorUniforms(); 704 void setupDrawPureColorUniforms(); 705 void setupDrawShaderIdentityUniforms(); 706 void setupDrawShaderUniforms(bool ignoreTransform = false); 707 void setupDrawColorFilterUniforms(); 708 void setupDrawSimpleMesh(); 709 void setupDrawTexture(GLuint texture); 710 void setupDrawExternalTexture(GLuint texture); 711 void setupDrawTextureTransform(); 712 void setupDrawTextureTransformUniforms(mat4& transform); 713 void setupDrawTextGammaUniforms(); 714 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 715 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 716 void setupDrawVertices(GLvoid* vertices); 717 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 718 float strokeWidth, int& widthSlot, int& lengthSlot); 719 void finishDrawAALine(const int widthSlot, const int lengthSlot); 720 void finishDrawTexture(); 721 void accountForClear(SkXfermode::Mode mode); 722 723 bool updateLayer(Layer* layer, bool inFrame); 724 void updateLayers(); 725 726 /** 727 * Renders the specified region as a series of rectangles. This method 728 * is used for debugging only. 729 */ 730 void drawRegionRects(const Region& region); 731 732 void debugOverdraw(bool enable, bool clear); 733 void renderOverdraw(); 734 735 /** 736 * Should be invoked every time the glScissor is modified. 737 */ 738 inline void dirtyClip() { 739 mDirtyClip = true; 740 } 741 742 // Dimensions of the drawing surface 743 int mWidth, mHeight; 744 745 // Matrix used for ortho projection in shaders 746 mat4 mOrthoMatrix; 747 748 // Model-view matrix used to position/size objects 749 mat4 mModelView; 750 751 // Number of saved states 752 int mSaveCount; 753 // Base state 754 sp<Snapshot> mFirstSnapshot; 755 // Current state 756 sp<Snapshot> mSnapshot; 757 // State used to define the clipping region 758 sp<Snapshot> mTilingSnapshot; 759 760 // Shaders 761 SkiaShader* mShader; 762 763 // Color filters 764 SkiaColorFilter* mColorFilter; 765 766 // Used to draw textured quads 767 TextureVertex mMeshVertices[4]; 768 769 // Drop shadow 770 bool mHasShadow; 771 float mShadowRadius; 772 float mShadowDx; 773 float mShadowDy; 774 int mShadowColor; 775 776 // Draw filters 777 bool mHasDrawFilter; 778 int mPaintFilterClearBits; 779 int mPaintFilterSetBits; 780 SkPaint mFilteredPaint; 781 782 // Various caches 783 Caches& mCaches; 784 785 // List of rectangles to clear after saveLayer() is invoked 786 Vector<Rect*> mLayers; 787 // List of functors to invoke after a frame is drawn 788 SortedVector<Functor*> mFunctors; 789 // List of layers to update at the beginning of a frame 790 Vector<Layer*> mLayerUpdates; 791 792 // Indentity matrix 793 const mat4 mIdentity; 794 795 // Indicates whether the clip must be restored 796 bool mDirtyClip; 797 798 // The following fields are used to setup drawing 799 // Used to describe the shaders to generate 800 ProgramDescription mDescription; 801 // Color description 802 bool mColorSet; 803 float mColorA, mColorR, mColorG, mColorB; 804 // Indicates that the shader should get a color 805 bool mSetShaderColor; 806 // Current texture unit 807 GLuint mTextureUnit; 808 // Track dirty regions, true by default 809 bool mTrackDirtyRegions; 810 // Indicate whether we are drawing an opaque frame 811 bool mOpaqueFrame; 812 813 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 814 // Properties.h 815 bool mScissorOptimizationDisabled; 816 817 // No-ops start/endTiling when set 818 bool mSuppressTiling; 819 820 friend class DisplayListRenderer; 821 822}; // class OpenGLRenderer 823 824}; // namespace uirenderer 825}; // namespace android 826 827#endif // ANDROID_HWUI_OPENGL_RENDERER_H 828