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 48 namespace android { 49 namespace uirenderer { 50 51 /////////////////////////////////////////////////////////////////////////////// 52 // Renderer 53 /////////////////////////////////////////////////////////////////////////////// 54 55 class 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 */ 61 class OpenGLRenderer { 62 public: 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 status_t 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 status_t 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 */ setAlpha(float alpha)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 */ getAlphaAndModeDirect(SkPaint * paint,int * alpha,SkXfermode::Mode * mode)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 } 264 265 protected: 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 * Clears the underlying surface if needed. 274 */ 275 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 276 277 /** 278 * Call this method after updating a layer during a drawing pass. 279 */ 280 void resumeAfterLayer(); 281 282 /** 283 * Compose the layer defined in the current snapshot with the layer 284 * defined by the previous snapshot. 285 * 286 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 287 * 288 * @param curent The current snapshot containing the layer to compose 289 * @param previous The previous snapshot to compose the current layer with 290 */ 291 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 292 293 /** 294 * Marks the specified region as dirty at the specified bounds. 295 */ 296 void dirtyLayerUnchecked(Rect& bounds, Region* region); 297 298 /** 299 * Returns the current snapshot. 300 */ getSnapshot()301 sp<Snapshot> getSnapshot() { 302 return mSnapshot; 303 } 304 305 /** 306 * Returns the region of the current layer. 307 */ getRegion()308 virtual Region* getRegion() { 309 return mSnapshot->region; 310 } 311 312 /** 313 * Indicates whether rendering is currently targeted at a layer. 314 */ hasLayer()315 virtual bool hasLayer() { 316 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 317 } 318 319 /** 320 * Returns the name of the FBO this renderer is rendering into. 321 */ getTargetFbo()322 virtual GLint getTargetFbo() { 323 return 0; 324 } 325 326 /** 327 * Renders the specified layer as a textured quad. 328 * 329 * @param layer The layer to render 330 * @param rect The bounds of the layer 331 */ 332 void drawTextureLayer(Layer* layer, const Rect& rect); 333 334 /** 335 * Gets the alpha and xfermode out of a paint object. If the paint is null 336 * alpha will be 255 and the xfermode will be SRC_OVER. 337 * 338 * @param paint The paint to extract values from 339 * @param alpha Where to store the resulting alpha 340 * @param mode Where to store the resulting xfermode 341 */ 342 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 343 344 /** 345 * Safely retrieves the mode from the specified xfermode. If the specified 346 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 347 */ getXfermode(SkXfermode * mode)348 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 349 SkXfermode::Mode resultMode; 350 if (!SkXfermode::AsMode(mode, &resultMode)) { 351 resultMode = SkXfermode::kSrcOver_Mode; 352 } 353 return resultMode; 354 } 355 356 /** 357 * Set to true to suppress error checks at the end of a frame. 358 */ suppressErrorChecks()359 virtual bool suppressErrorChecks() { 360 return false; 361 } 362 getCaches()363 Caches& getCaches() { 364 return mCaches; 365 } 366 367 private: 368 /** 369 * Ensures the state of the renderer is the same as the state of 370 * the GL context. 371 */ 372 void syncState(); 373 374 /** 375 * Tells the GPU what part of the screen is about to be redrawn. 376 * This method needs to be invoked every time getTargetFbo() is 377 * bound again. 378 */ 379 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 380 381 /** 382 * Tells the GPU that we are done drawing the frame or that we 383 * are switching to another render target. 384 */ 385 void endTiling(); 386 387 /** 388 * Saves the current state of the renderer as a new snapshot. 389 * The new snapshot is saved in mSnapshot and the previous snapshot 390 * is linked from mSnapshot->previous. 391 * 392 * @param flags The save flags; see SkCanvas for more information 393 * 394 * @return The new save count. This value can be passed to #restoreToCount() 395 */ 396 int saveSnapshot(int flags); 397 398 /** 399 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 400 * 401 * @return True if the clip was modified. 402 */ 403 bool restoreSnapshot(); 404 405 /** 406 * Sets the clipping rectangle using glScissor. The clip is defined by 407 * the current snapshot's clipRect member. 408 */ 409 void setScissorFromClip(); 410 411 /** 412 * Performs a quick reject but does not affect the scissor. Returns 413 * the transformed rect to test and the current clip. 414 */ 415 bool quickRejectNoScissor(float left, float top, float right, float bottom, 416 Rect& transformed, Rect& clip); 417 418 /** 419 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 420 */ 421 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 422 423 /** 424 * Creates a new layer stored in the specified snapshot. 425 * 426 * @param snapshot The snapshot associated with the new layer 427 * @param left The left coordinate of the layer 428 * @param top The top coordinate of the layer 429 * @param right The right coordinate of the layer 430 * @param bottom The bottom coordinate of the layer 431 * @param alpha The translucency of the layer 432 * @param mode The blending mode of the layer 433 * @param flags The layer save flags 434 * @param previousFbo The name of the current framebuffer 435 * 436 * @return True if the layer was successfully created, false otherwise 437 */ 438 bool createLayer(float left, float top, float right, float bottom, 439 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 440 441 /** 442 * Creates a new layer stored in the specified snapshot as an FBO. 443 * 444 * @param layer The layer to store as an FBO 445 * @param snapshot The snapshot associated with the new layer 446 * @param bounds The bounds of the layer 447 * @param previousFbo The name of the current framebuffer 448 */ 449 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 450 451 /** 452 * Compose the specified layer as a region. 453 * 454 * @param layer The layer to compose 455 * @param rect The layer's bounds 456 */ 457 void composeLayerRegion(Layer* layer, const Rect& rect); 458 459 /** 460 * Compose the specified layer as a simple rectangle. 461 * 462 * @param layer The layer to compose 463 * @param rect The layer's bounds 464 * @param swap If true, the source and destination are swapped 465 */ 466 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 467 468 /** 469 * Clears all the regions corresponding to the current list of layers. 470 * This method MUST be invoked before any drawing operation. 471 */ 472 void clearLayerRegions(); 473 474 /** 475 * Mark the layer as dirty at the specified coordinates. The coordinates 476 * are transformed with the supplied matrix. 477 */ 478 void dirtyLayer(const float left, const float top, 479 const float right, const float bottom, const mat4 transform); 480 481 /** 482 * Mark the layer as dirty at the specified coordinates. 483 */ 484 void dirtyLayer(const float left, const float top, 485 const float right, const float bottom); 486 487 /** 488 * Draws a colored rectangle with the specified color. The specified coordinates 489 * are transformed by the current snapshot's transform matrix. 490 * 491 * @param left The left coordinate of the rectangle 492 * @param top The top coordinate of the rectangle 493 * @param right The right coordinate of the rectangle 494 * @param bottom The bottom coordinate of the rectangle 495 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 496 * @param mode The Skia xfermode to use 497 * @param ignoreTransform True if the current transform should be ignored 498 */ 499 void drawColorRect(float left, float top, float right, float bottom, 500 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 501 502 /** 503 * Draws the shape represented by the specified path texture. 504 * This method invokes drawPathTexture() but takes into account 505 * the extra left/top offset and the texture offset to correctly 506 * position the final shape. 507 * 508 * @param left The left coordinate of the shape to render 509 * @param top The top coordinate of the shape to render 510 * @param texture The texture reprsenting the shape 511 * @param paint The paint to draw the shape with 512 */ 513 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 514 515 /** 516 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 517 * different compositing rules. 518 * 519 * @param texture The texture to draw with 520 * @param left The x coordinate of the bitmap 521 * @param top The y coordinate of the bitmap 522 * @param paint The paint to render with 523 */ 524 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 525 526 /** 527 * Renders the convex hull defined by the specified path as a strip of polygons. 528 * 529 * @param path The hull of the path to draw 530 * @param paint The paint to render with 531 */ 532 void drawConvexPath(const SkPath& path, SkPaint* paint); 533 534 /** 535 * Draws a textured rectangle with the specified texture. The specified coordinates 536 * are transformed by the current snapshot's transform matrix. 537 * 538 * @param left The left coordinate of the rectangle 539 * @param top The top coordinate of the rectangle 540 * @param right The right coordinate of the rectangle 541 * @param bottom The bottom coordinate of the rectangle 542 * @param texture The texture name to map onto the rectangle 543 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 544 * @param mode The blending mode 545 * @param blend True if the texture contains an alpha channel 546 */ 547 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 548 float alpha, SkXfermode::Mode mode, bool blend); 549 550 /** 551 * Draws a textured rectangle with the specified texture. The specified coordinates 552 * are transformed by the current snapshot's transform matrix. 553 * 554 * @param left The left coordinate of the rectangle 555 * @param top The top coordinate of the rectangle 556 * @param right The right coordinate of the rectangle 557 * @param bottom The bottom coordinate of the rectangle 558 * @param texture The texture to use 559 * @param paint The paint containing the alpha, blending mode, etc. 560 */ 561 void drawTextureRect(float left, float top, float right, float bottom, 562 Texture* texture, SkPaint* paint); 563 564 /** 565 * Draws a textured mesh with the specified texture. If the indices are omitted, 566 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 567 * VBO is bound. 568 * 569 * @param left The left coordinate of the rectangle 570 * @param top The top coordinate of the rectangle 571 * @param right The right coordinate of the rectangle 572 * @param bottom The bottom coordinate of the rectangle 573 * @param texture The texture name to map onto the rectangle 574 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 575 * @param mode The blending mode 576 * @param blend True if the texture contains an alpha channel 577 * @param vertices The vertices that define the mesh 578 * @param texCoords The texture coordinates of each vertex 579 * @param elementsCount The number of elements in the mesh, required by indices 580 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 581 * @param ignoreTransform True if the current transform should be ignored 582 * @param vbo The VBO used to draw the mesh 583 * @param ignoreScale True if the model view matrix should not be scaled 584 * @param dirty True if calling this method should dirty the current layer 585 */ 586 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 587 float alpha, SkXfermode::Mode mode, bool blend, 588 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 589 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 590 bool ignoreScale = false, bool dirty = true); 591 592 /** 593 * Draws text underline and strike-through if needed. 594 * 595 * @param text The text to decor 596 * @param bytesCount The number of bytes in the text 597 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 598 * @param x The x coordinate where the text will be drawn 599 * @param y The y coordinate where the text will be drawn 600 * @param paint The paint to draw the text with 601 */ 602 void drawTextDecorations(const char* text, int bytesCount, float length, 603 float x, float y, SkPaint* paint); 604 605 /** 606 * Draws shadow layer on text (with optional positions). 607 * 608 * @param paint The paint to draw the shadow with 609 * @param text The text to draw 610 * @param bytesCount The number of bytes in the text 611 * @param count The number of glyphs in the text 612 * @param positions The x, y positions of individual glyphs (or NULL) 613 * @param fontRenderer The font renderer object 614 * @param alpha The alpha value for drawing the shadow 615 * @param mode The xfermode for drawing the shadow 616 * @param x The x coordinate where the shadow will be drawn 617 * @param y The y coordinate where the shadow will be drawn 618 */ 619 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 620 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 621 float x, float y); 622 623 /** 624 * Draws a path texture. Path textures are alpha8 bitmaps that need special 625 * compositing to apply colors/filters/etc. 626 * 627 * @param texture The texture to render 628 * @param x The x coordinate where the texture will be drawn 629 * @param y The y coordinate where the texture will be drawn 630 * @param paint The paint to draw the texture with 631 */ 632 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 633 634 /** 635 * Resets the texture coordinates stored in mMeshVertices. Setting the values 636 * back to default is achieved by calling: 637 * 638 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 639 * 640 * @param u1 The left coordinate of the texture 641 * @param v1 The bottom coordinate of the texture 642 * @param u2 The right coordinate of the texture 643 * @param v2 The top coordinate of the texture 644 */ 645 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 646 647 /** 648 * Binds the specified texture. The texture unit must have been selected 649 * prior to calling this method. 650 */ bindTexture(GLuint texture)651 inline void bindTexture(GLuint texture) { 652 glBindTexture(GL_TEXTURE_2D, texture); 653 } 654 655 /** 656 * Binds the specified EGLImage texture. The texture unit must have been selected 657 * prior to calling this method. 658 */ bindExternalTexture(GLuint texture)659 inline void bindExternalTexture(GLuint texture) { 660 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 661 } 662 663 /** 664 * Enable or disable blending as necessary. This function sets the appropriate 665 * blend function based on the specified xfermode. 666 */ 667 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 668 bool swapSrcDst = false); 669 670 /** 671 * Use the specified program with the current GL context. If the program is already 672 * in use, it will not be bound again. If it is not in use, the current program is 673 * marked unused and the specified program becomes used and becomes the new 674 * current program. 675 * 676 * @param program The program to use 677 * 678 * @return true If the specified program was already in use, false otherwise. 679 */ 680 inline bool useProgram(Program* program); 681 682 /** 683 * Invoked before any drawing operation. This sets required state. 684 */ 685 void setupDraw(bool clear = true); 686 687 /** 688 * Various methods to setup OpenGL rendering. 689 */ 690 void setupDrawWithTexture(bool isAlpha8 = false); 691 void setupDrawWithExternalTexture(); 692 void setupDrawNoTexture(); 693 void setupDrawAA(); 694 void setupDrawVertexShape(); 695 void setupDrawPoint(float pointSize); 696 void setupDrawColor(int color); 697 void setupDrawColor(int color, int alpha); 698 void setupDrawColor(float r, float g, float b, float a); 699 void setupDrawAlpha8Color(int color, int alpha); 700 void setupDrawTextGamma(const SkPaint* paint); 701 void setupDrawShader(); 702 void setupDrawColorFilter(); 703 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 704 bool swapSrcDst = false); 705 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 706 bool swapSrcDst = false); 707 void setupDrawProgram(); 708 void setupDrawDirtyRegionsDisabled(); 709 void setupDrawModelViewIdentity(bool offset = false); 710 void setupDrawModelView(float left, float top, float right, float bottom, 711 bool ignoreTransform = false, bool ignoreModelView = false); 712 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 713 bool ignoreTransform = false); 714 void setupDrawPointUniforms(); 715 void setupDrawColorUniforms(); 716 void setupDrawPureColorUniforms(); 717 void setupDrawShaderIdentityUniforms(); 718 void setupDrawShaderUniforms(bool ignoreTransform = false); 719 void setupDrawColorFilterUniforms(); 720 void setupDrawSimpleMesh(); 721 void setupDrawTexture(GLuint texture); 722 void setupDrawExternalTexture(GLuint texture); 723 void setupDrawTextureTransform(); 724 void setupDrawTextureTransformUniforms(mat4& transform); 725 void setupDrawTextGammaUniforms(); 726 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 727 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 728 void setupDrawVertices(GLvoid* vertices); 729 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 730 float strokeWidth, int& widthSlot, int& lengthSlot); 731 void finishDrawAALine(const int widthSlot, const int lengthSlot); 732 void finishDrawTexture(); 733 void accountForClear(SkXfermode::Mode mode); 734 735 bool updateLayer(Layer* layer, bool inFrame); 736 void updateLayers(); 737 738 /** 739 * Renders the specified region as a series of rectangles. This method 740 * is used for debugging only. 741 */ 742 void drawRegionRects(const Region& region); 743 744 void debugOverdraw(bool enable, bool clear); 745 void renderOverdraw(); 746 747 /** 748 * Should be invoked every time the glScissor is modified. 749 */ dirtyClip()750 inline void dirtyClip() { 751 mDirtyClip = true; 752 } 753 754 // Dimensions of the drawing surface 755 int mWidth, mHeight; 756 757 // Matrix used for ortho projection in shaders 758 mat4 mOrthoMatrix; 759 760 // Model-view matrix used to position/size objects 761 mat4 mModelView; 762 763 // Number of saved states 764 int mSaveCount; 765 // Base state 766 sp<Snapshot> mFirstSnapshot; 767 // Current state 768 sp<Snapshot> mSnapshot; 769 // State used to define the clipping region 770 sp<Snapshot> mTilingSnapshot; 771 772 // Shaders 773 SkiaShader* mShader; 774 775 // Color filters 776 SkiaColorFilter* mColorFilter; 777 778 // Used to draw textured quads 779 TextureVertex mMeshVertices[4]; 780 781 // Drop shadow 782 bool mHasShadow; 783 float mShadowRadius; 784 float mShadowDx; 785 float mShadowDy; 786 int mShadowColor; 787 788 // Draw filters 789 bool mHasDrawFilter; 790 int mPaintFilterClearBits; 791 int mPaintFilterSetBits; 792 SkPaint mFilteredPaint; 793 794 // Various caches 795 Caches& mCaches; 796 797 // List of rectangles to clear after saveLayer() is invoked 798 Vector<Rect*> mLayers; 799 // List of functors to invoke after a frame is drawn 800 SortedVector<Functor*> mFunctors; 801 // List of layers to update at the beginning of a frame 802 Vector<Layer*> mLayerUpdates; 803 804 // Indentity matrix 805 const mat4 mIdentity; 806 807 // Indicates whether the clip must be restored 808 bool mDirtyClip; 809 810 // The following fields are used to setup drawing 811 // Used to describe the shaders to generate 812 ProgramDescription mDescription; 813 // Color description 814 bool mColorSet; 815 float mColorA, mColorR, mColorG, mColorB; 816 // Indicates that the shader should get a color 817 bool mSetShaderColor; 818 // Current texture unit 819 GLuint mTextureUnit; 820 // Track dirty regions, true by default 821 bool mTrackDirtyRegions; 822 // Indicate whether we are drawing an opaque frame 823 bool mOpaqueFrame; 824 825 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 826 // Properties.h 827 bool mScissorOptimizationDisabled; 828 829 // No-ops start/endTiling when set 830 bool mSuppressTiling; 831 832 friend class DisplayListRenderer; 833 834 }; // class OpenGLRenderer 835 836 }; // namespace uirenderer 837 }; // namespace android 838 839 #endif // ANDROID_HWUI_OPENGL_RENDERER_H 840