OpenGLRenderer.h revision 7c450aaa3caac2a05fcb20a177483d0e92378426
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 * Indicates whether this renderer executes drawing commands immediately. 68 * If this method returns true, the drawing commands will be executed 69 * later. 70 */ 71 virtual bool isDeferred(); 72 73 /** 74 * Sets the dimension of the underlying drawing surface. This method must 75 * be called at least once every time the drawing surface changes size. 76 * 77 * @param width The width in pixels of the underlysing surface 78 * @param height The height in pixels of the underlysing surface 79 */ 80 virtual void setViewport(int width, int height); 81 82 /** 83 * Prepares the renderer to draw a frame. This method must be invoked 84 * at the beginning of each frame. When this method is invoked, the 85 * entire drawing surface is assumed to be redrawn. 86 * 87 * @param opaque If true, the target surface is considered opaque 88 * and will not be cleared. If false, the target surface 89 * will be cleared 90 */ 91 ANDROID_API int prepare(bool opaque); 92 93 /** 94 * Prepares the renderer to draw a frame. This method must be invoked 95 * at the beginning of each frame. Only the specified rectangle of the 96 * frame is assumed to be dirty. A clip will automatically be set to 97 * the specified rectangle. 98 * 99 * @param left The left coordinate of the dirty rectangle 100 * @param top The top coordinate of the dirty rectangle 101 * @param right The right coordinate of the dirty rectangle 102 * @param bottom The bottom coordinate of the dirty rectangle 103 * @param opaque If true, the target surface is considered opaque 104 * and will not be cleared. If false, the target surface 105 * will be cleared in the specified dirty rectangle 106 */ 107 virtual int prepareDirty(float left, float top, float right, float bottom, bool opaque); 108 109 /** 110 * Indicates the end of a frame. This method must be invoked whenever 111 * the caller is done rendering a frame. 112 */ 113 virtual void finish(); 114 115 /** 116 * This method must be invoked before handing control over to a draw functor. 117 * See callDrawGLFunction() for instance. 118 * 119 * This command must not be recorded inside display lists. 120 */ 121 virtual void interrupt(); 122 123 /** 124 * This method must be invoked after getting control back from a draw functor. 125 * 126 * This command must not be recorded inside display lists. 127 */ 128 virtual void resume(); 129 130 ANDROID_API status_t invokeFunctors(Rect& dirty); 131 ANDROID_API void detachFunctor(Functor* functor); 132 ANDROID_API void attachFunctor(Functor* functor); 133 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 134 135 ANDROID_API void pushLayerUpdate(Layer* layer); 136 ANDROID_API void clearLayerUpdates(); 137 138 ANDROID_API int getSaveCount() const; 139 virtual int save(int flags); 140 virtual void restore(); 141 virtual void restoreToCount(int saveCount); 142 143 virtual int saveLayer(float left, float top, float right, float bottom, 144 SkPaint* p, int flags); 145 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 146 int alpha, int flags); 147 148 virtual void translate(float dx, float dy); 149 virtual void rotate(float degrees); 150 virtual void scale(float sx, float sy); 151 virtual void skew(float sx, float sy); 152 153 ANDROID_API void getMatrix(SkMatrix* matrix); 154 virtual void setMatrix(SkMatrix* matrix); 155 virtual void concatMatrix(SkMatrix* matrix); 156 157 ANDROID_API const Rect& getClipBounds(); 158 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 159 bool quickRejectNoScissor(float left, float top, float right, float bottom); 160 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 161 virtual Rect* getClipRect(); 162 163 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 164 uint32_t level = 0); 165 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 166 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 167 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 168 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 169 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 170 float srcRight, float srcBottom, float dstLeft, float dstTop, 171 float dstRight, float dstBottom, SkPaint* paint); 172 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 173 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 174 float* vertices, int* colors, SkPaint* paint); 175 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 176 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 177 float left, float top, float right, float bottom, SkPaint* paint); 178 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 179 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 180 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 181 virtual status_t drawColor(int color, SkXfermode::Mode mode); 182 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 183 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 184 float rx, float ry, SkPaint* paint); 185 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 186 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 187 virtual status_t drawArc(float left, float top, float right, float bottom, 188 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 189 virtual status_t drawPath(SkPath* path, SkPaint* paint); 190 virtual status_t drawLines(float* points, int count, SkPaint* paint); 191 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 192 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 193 float hOffset, float vOffset, SkPaint* paint); 194 virtual status_t drawPosText(const char* text, int bytesCount, int count, 195 const float* positions, SkPaint* paint); 196 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 197 const float* positions, SkPaint* paint, float length = -1.0f); 198 199 virtual void resetShader(); 200 virtual void setupShader(SkiaShader* shader); 201 202 virtual void resetColorFilter(); 203 virtual void setupColorFilter(SkiaColorFilter* filter); 204 205 virtual void resetShadow(); 206 virtual void setupShadow(float radius, float dx, float dy, int color); 207 208 virtual void resetPaintFilter(); 209 virtual void setupPaintFilter(int clearBits, int setBits); 210 211 SkPaint* filterPaint(SkPaint* paint); 212 213 /** 214 * Sets the alpha on the current snapshot. This alpha value will be modulated 215 * with other alpha values when drawing primitives. 216 */ 217 void setAlpha(float alpha) { 218 mSnapshot->alpha = alpha; 219 } 220 221 /** 222 * Inserts a named group marker in the stream of GL commands. This marker 223 * can be used by tools to group commands into logical groups. A call to 224 * this method must always be followed later on by a call to endMark(). 225 */ 226 void startMark(const char* name) const; 227 228 /** 229 * Closes the last group marker opened by startMark(). 230 */ 231 void endMark() const; 232 233 /** 234 * Gets the alpha and xfermode out of a paint object. If the paint is null 235 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 236 * not multiply the paint's alpha by the current snapshot's alpha. 237 * 238 * @param paint The paint to extract values from 239 * @param alpha Where to store the resulting alpha 240 * @param mode Where to store the resulting xfermode 241 */ 242 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 243 if (paint) { 244 *mode = getXfermode(paint->getXfermode()); 245 246 // Skia draws using the color's alpha channel if < 255 247 // Otherwise, it uses the paint's alpha 248 int color = paint->getColor(); 249 *alpha = (color >> 24) & 0xFF; 250 if (*alpha == 255) { 251 *alpha = paint->getAlpha(); 252 } 253 } else { 254 *mode = SkXfermode::kSrcOver_Mode; 255 *alpha = 255; 256 } 257 } 258 259protected: 260 /** 261 * Computes the projection matrix, initialize the first snapshot 262 * and stores the dimensions of the render target. 263 */ 264 void initViewport(int width, int height); 265 266 /** 267 * Call this method after updating a layer during a drawing pass. 268 */ 269 void resumeAfterLayer(); 270 271 /** 272 * Compose the layer defined in the current snapshot with the layer 273 * defined by the previous snapshot. 274 * 275 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 276 * 277 * @param curent The current snapshot containing the layer to compose 278 * @param previous The previous snapshot to compose the current layer with 279 */ 280 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 281 282 /** 283 * Marks the specified region as dirty at the specified bounds. 284 */ 285 void dirtyLayerUnchecked(Rect& bounds, Region* region); 286 287 /** 288 * Returns the current snapshot. 289 */ 290 sp<Snapshot> getSnapshot() { 291 return mSnapshot; 292 } 293 294 /** 295 * Returns the region of the current layer. 296 */ 297 virtual Region* getRegion() { 298 return mSnapshot->region; 299 } 300 301 /** 302 * Indicates whether rendering is currently targeted at a layer. 303 */ 304 virtual bool hasLayer() { 305 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 306 } 307 308 /** 309 * Returns the name of the FBO this renderer is rendering into. 310 */ 311 virtual GLint getTargetFbo() { 312 return 0; 313 } 314 315 /** 316 * Renders the specified layer as a textured quad. 317 * 318 * @param layer The layer to render 319 * @param rect The bounds of the layer 320 */ 321 void drawTextureLayer(Layer* layer, const Rect& rect); 322 323 /** 324 * Gets the alpha and xfermode out of a paint object. If the paint is null 325 * alpha will be 255 and the xfermode will be SRC_OVER. 326 * 327 * @param paint The paint to extract values from 328 * @param alpha Where to store the resulting alpha 329 * @param mode Where to store the resulting xfermode 330 */ 331 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 332 333 /** 334 * Safely retrieves the mode from the specified xfermode. If the specified 335 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 336 */ 337 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 338 SkXfermode::Mode resultMode; 339 if (!SkXfermode::AsMode(mode, &resultMode)) { 340 resultMode = SkXfermode::kSrcOver_Mode; 341 } 342 return resultMode; 343 } 344 345 /** 346 * Set to true to suppress error checks at the end of a frame. 347 */ 348 virtual bool suppressErrorChecks() { 349 return false; 350 } 351 352private: 353 /** 354 * Ensures the state of the renderer is the same as the state of 355 * the GL context. 356 */ 357 void syncState(); 358 359 /** 360 * Tells the GPU what part of the screen is about to be redrawn. 361 * This method needs to be invoked every time getTargetFbo() is 362 * bound again. 363 */ 364 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 365 366 /** 367 * Tells the GPU that we are done drawing the frame or that we 368 * are switching to another render target. 369 */ 370 void endTiling(); 371 372 /** 373 * Saves the current state of the renderer as a new snapshot. 374 * The new snapshot is saved in mSnapshot and the previous snapshot 375 * is linked from mSnapshot->previous. 376 * 377 * @param flags The save flags; see SkCanvas for more information 378 * 379 * @return The new save count. This value can be passed to #restoreToCount() 380 */ 381 int saveSnapshot(int flags); 382 383 /** 384 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 385 * 386 * @return True if the clip was modified. 387 */ 388 bool restoreSnapshot(); 389 390 /** 391 * Sets the clipping rectangle using glScissor. The clip is defined by 392 * the current snapshot's clipRect member. 393 */ 394 void setScissorFromClip(); 395 396 /** 397 * Performs a quick reject but does not affect the scissor. Returns 398 * the transformed rect to test and the current clip. 399 */ 400 bool quickRejectNoScissor(float left, float top, float right, float bottom, 401 Rect& transformed, Rect& clip); 402 403 /** 404 * Creates a new layer stored in the specified snapshot. 405 * 406 * @param snapshot The snapshot associated with the new layer 407 * @param left The left coordinate of the layer 408 * @param top The top coordinate of the layer 409 * @param right The right coordinate of the layer 410 * @param bottom The bottom coordinate of the layer 411 * @param alpha The translucency of the layer 412 * @param mode The blending mode of the layer 413 * @param flags The layer save flags 414 * @param previousFbo The name of the current framebuffer 415 * 416 * @return True if the layer was successfully created, false otherwise 417 */ 418 bool createLayer(float left, float top, float right, float bottom, 419 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 420 421 /** 422 * Creates a new layer stored in the specified snapshot as an FBO. 423 * 424 * @param layer The layer to store as an FBO 425 * @param snapshot The snapshot associated with the new layer 426 * @param bounds The bounds of the layer 427 * @param previousFbo The name of the current framebuffer 428 */ 429 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 430 431 /** 432 * Compose the specified layer as a region. 433 * 434 * @param layer The layer to compose 435 * @param rect The layer's bounds 436 */ 437 void composeLayerRegion(Layer* layer, const Rect& rect); 438 439 /** 440 * Compose the specified layer as a simple rectangle. 441 * 442 * @param layer The layer to compose 443 * @param rect The layer's bounds 444 * @param swap If true, the source and destination are swapped 445 */ 446 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 447 448 /** 449 * Clears all the regions corresponding to the current list of layers. 450 * This method MUST be invoked before any drawing operation. 451 */ 452 void clearLayerRegions(); 453 454 /** 455 * Mark the layer as dirty at the specified coordinates. The coordinates 456 * are transformed with the supplied matrix. 457 */ 458 void dirtyLayer(const float left, const float top, 459 const float right, const float bottom, const mat4 transform); 460 461 /** 462 * Mark the layer as dirty at the specified coordinates. 463 */ 464 void dirtyLayer(const float left, const float top, 465 const float right, const float bottom); 466 467 /** 468 * Draws a colored rectangle with the specified color. The specified coordinates 469 * are transformed by the current snapshot's transform matrix. 470 * 471 * @param left The left coordinate of the rectangle 472 * @param top The top coordinate of the rectangle 473 * @param right The right coordinate of the rectangle 474 * @param bottom The bottom coordinate of the rectangle 475 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 476 * @param mode The Skia xfermode to use 477 * @param ignoreTransform True if the current transform should be ignored 478 */ 479 void drawColorRect(float left, float top, float right, float bottom, 480 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 481 482 /** 483 * Draws the shape represented by the specified path texture. 484 * This method invokes drawPathTexture() but takes into account 485 * the extra left/top offset and the texture offset to correctly 486 * position the final shape. 487 * 488 * @param left The left coordinate of the shape to render 489 * @param top The top coordinate of the shape to render 490 * @param texture The texture reprsenting the shape 491 * @param paint The paint to draw the shape with 492 */ 493 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 494 495 /** 496 * Renders the rect defined by the specified bounds as a shape. 497 * This will render the rect using a path texture, which is used to render 498 * rects with stroke effects. 499 * 500 * @param left The left coordinate of the rect to draw 501 * @param top The top coordinate of the rect to draw 502 * @param right The right coordinate of the rect to draw 503 * @param bottom The bottom coordinate of the rect to draw 504 * @param p The paint to draw the rect with 505 */ 506 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 507 508 /** 509 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 510 * different compositing rules. 511 * 512 * @param texture The texture to draw with 513 * @param left The x coordinate of the bitmap 514 * @param top The y coordinate of the bitmap 515 * @param paint The paint to render with 516 */ 517 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 518 519 /** 520 * Renders the rect defined by the specified bounds as an anti-aliased rect. 521 * 522 * @param left The left coordinate of the rect to draw 523 * @param top The top coordinate of the rect to draw 524 * @param right The right coordinate of the rect to draw 525 * @param bottom The bottom coordinate of the rect to draw 526 * @param color The color of the rect 527 * @param mode The blending mode to draw the rect 528 */ 529 void drawAARect(float left, float top, float right, float bottom, 530 int color, SkXfermode::Mode mode); 531 532 /** 533 * Draws a textured rectangle with the specified texture. The specified coordinates 534 * are transformed by the current snapshot's transform matrix. 535 * 536 * @param left The left coordinate of the rectangle 537 * @param top The top coordinate of the rectangle 538 * @param right The right coordinate of the rectangle 539 * @param bottom The bottom coordinate of the rectangle 540 * @param texture The texture name to map onto the rectangle 541 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 542 * @param mode The blending mode 543 * @param blend True if the texture contains an alpha channel 544 */ 545 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 546 float alpha, SkXfermode::Mode mode, bool blend); 547 548 /** 549 * Draws a textured rectangle with the specified texture. The specified coordinates 550 * are transformed by the current snapshot's transform matrix. 551 * 552 * @param left The left coordinate of the rectangle 553 * @param top The top coordinate of the rectangle 554 * @param right The right coordinate of the rectangle 555 * @param bottom The bottom coordinate of the rectangle 556 * @param texture The texture to use 557 * @param paint The paint containing the alpha, blending mode, etc. 558 */ 559 void drawTextureRect(float left, float top, float right, float bottom, 560 Texture* texture, SkPaint* paint); 561 562 /** 563 * Draws a textured mesh with the specified texture. If the indices are omitted, 564 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 565 * VBO is bound. 566 * 567 * @param left The left coordinate of the rectangle 568 * @param top The top coordinate of the rectangle 569 * @param right The right coordinate of the rectangle 570 * @param bottom The bottom coordinate of the rectangle 571 * @param texture The texture name to map onto the rectangle 572 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 573 * @param mode The blending mode 574 * @param blend True if the texture contains an alpha channel 575 * @param vertices The vertices that define the mesh 576 * @param texCoords The texture coordinates of each vertex 577 * @param elementsCount The number of elements in the mesh, required by indices 578 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 579 * @param ignoreTransform True if the current transform should be ignored 580 * @param vbo The VBO used to draw the mesh 581 * @param ignoreScale True if the model view matrix should not be scaled 582 * @param dirty True if calling this method should dirty the current layer 583 */ 584 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 585 float alpha, SkXfermode::Mode mode, bool blend, 586 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 587 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 588 bool ignoreScale = false, bool dirty = true); 589 590 /** 591 * Draws text underline and strike-through if needed. 592 * 593 * @param text The text to decor 594 * @param bytesCount The number of bytes in the text 595 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 596 * @param x The x coordinate where the text will be drawn 597 * @param y The y coordinate where the text will be drawn 598 * @param paint The paint to draw the text with 599 */ 600 void drawTextDecorations(const char* text, int bytesCount, float length, 601 float x, float y, SkPaint* paint); 602 603 /** 604 * Draws shadow layer on text (with optional positions). 605 * 606 * @param paint The paint to draw the shadow with 607 * @param text The text to draw 608 * @param bytesCount The number of bytes in the text 609 * @param count The number of glyphs in the text 610 * @param positions The x, y positions of individual glyphs (or NULL) 611 * @param fontRenderer The font renderer object 612 * @param alpha The alpha value for drawing the shadow 613 * @param mode The xfermode for drawing the shadow 614 * @param x The x coordinate where the shadow will be drawn 615 * @param y The y coordinate where the shadow will be drawn 616 */ 617 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 618 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 619 float x, float y); 620 621 /** 622 * Draws a path texture. Path textures are alpha8 bitmaps that need special 623 * compositing to apply colors/filters/etc. 624 * 625 * @param texture The texture to render 626 * @param x The x coordinate where the texture will be drawn 627 * @param y The y coordinate where the texture will be drawn 628 * @param paint The paint to draw the texture with 629 */ 630 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 631 632 /** 633 * Resets the texture coordinates stored in mMeshVertices. Setting the values 634 * back to default is achieved by calling: 635 * 636 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 637 * 638 * @param u1 The left coordinate of the texture 639 * @param v1 The bottom coordinate of the texture 640 * @param u2 The right coordinate of the texture 641 * @param v2 The top coordinate of the texture 642 */ 643 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 644 645 /** 646 * Binds the specified texture. The texture unit must have been selected 647 * prior to calling this method. 648 */ 649 inline void bindTexture(GLuint texture) { 650 glBindTexture(GL_TEXTURE_2D, texture); 651 } 652 653 /** 654 * Binds the specified EGLImage texture. The texture unit must have been selected 655 * prior to calling this method. 656 */ 657 inline void bindExternalTexture(GLuint texture) { 658 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 659 } 660 661 /** 662 * Enable or disable blending as necessary. This function sets the appropriate 663 * blend function based on the specified xfermode. 664 */ 665 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 666 bool swapSrcDst = false); 667 668 /** 669 * Use the specified program with the current GL context. If the program is already 670 * in use, it will not be bound again. If it is not in use, the current program is 671 * marked unused and the specified program becomes used and becomes the new 672 * current program. 673 * 674 * @param program The program to use 675 * 676 * @return true If the specified program was already in use, false otherwise. 677 */ 678 inline bool useProgram(Program* program); 679 680 /** 681 * Invoked before any drawing operation. This sets required state. 682 */ 683 void setupDraw(bool clear = true); 684 685 /** 686 * Various methods to setup OpenGL rendering. 687 */ 688 void setupDrawWithTexture(bool isAlpha8 = false); 689 void setupDrawWithExternalTexture(); 690 void setupDrawNoTexture(); 691 void setupDrawAALine(); 692 void setupDrawAARect(); 693 void setupDrawPoint(float pointSize); 694 void setupDrawColor(int color); 695 void setupDrawColor(int color, int alpha); 696 void setupDrawColor(float r, float g, float b, float a); 697 void setupDrawAlpha8Color(int color, int alpha); 698 void setupDrawTextGamma(const SkPaint* paint); 699 void setupDrawShader(); 700 void setupDrawColorFilter(); 701 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 702 bool swapSrcDst = false); 703 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 704 bool swapSrcDst = false); 705 void setupDrawProgram(); 706 void setupDrawDirtyRegionsDisabled(); 707 void setupDrawModelViewIdentity(bool offset = false); 708 void setupDrawModelView(float left, float top, float right, float bottom, 709 bool ignoreTransform = false, bool ignoreModelView = false); 710 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 711 bool ignoreTransform = false); 712 void setupDrawPointUniforms(); 713 void setupDrawColorUniforms(); 714 void setupDrawPureColorUniforms(); 715 void setupDrawShaderIdentityUniforms(); 716 void setupDrawShaderUniforms(bool ignoreTransform = false); 717 void setupDrawColorFilterUniforms(); 718 void setupDrawSimpleMesh(); 719 void setupDrawTexture(GLuint texture); 720 void setupDrawExternalTexture(GLuint texture); 721 void setupDrawTextureTransform(); 722 void setupDrawTextureTransformUniforms(mat4& transform); 723 void setupDrawTextGammaUniforms(); 724 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 725 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 726 void setupDrawVertices(GLvoid* vertices); 727 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 728 float strokeWidth, int& widthSlot, int& lengthSlot); 729 void finishDrawAALine(const int widthSlot, const int lengthSlot); 730 void finishDrawTexture(); 731 void accountForClear(SkXfermode::Mode mode); 732 733 bool updateLayer(Layer* layer, bool inFrame); 734 void updateLayers(); 735 736 /** 737 * Renders the specified region as a series of rectangles. This method 738 * is used for debugging only. 739 */ 740 void drawRegionRects(const Region& region); 741 742 void debugOverdraw(bool enable, bool clear); 743 void renderOverdraw(); 744 745 /** 746 * Should be invoked every time the glScissor is modified. 747 */ 748 inline void dirtyClip() { 749 mDirtyClip = true; 750 } 751 752 // Dimensions of the drawing surface 753 int mWidth, mHeight; 754 755 // Matrix used for ortho projection in shaders 756 mat4 mOrthoMatrix; 757 758 // Model-view matrix used to position/size objects 759 mat4 mModelView; 760 761 // Number of saved states 762 int mSaveCount; 763 // Base state 764 sp<Snapshot> mFirstSnapshot; 765 // Current state 766 sp<Snapshot> mSnapshot; 767 // State used to define the clipping region 768 sp<Snapshot> mTilingSnapshot; 769 770 // Shaders 771 SkiaShader* mShader; 772 773 // Color filters 774 SkiaColorFilter* mColorFilter; 775 776 // Used to draw textured quads 777 TextureVertex mMeshVertices[4]; 778 779 // Drop shadow 780 bool mHasShadow; 781 float mShadowRadius; 782 float mShadowDx; 783 float mShadowDy; 784 int mShadowColor; 785 786 // Draw filters 787 bool mHasDrawFilter; 788 int mPaintFilterClearBits; 789 int mPaintFilterSetBits; 790 SkPaint mFilteredPaint; 791 792 // Various caches 793 Caches& mCaches; 794 795 // List of rectangles to clear after saveLayer() is invoked 796 Vector<Rect*> mLayers; 797 // List of functors to invoke after a frame is drawn 798 SortedVector<Functor*> mFunctors; 799 // List of layers to update at the beginning of a frame 800 Vector<Layer*> mLayerUpdates; 801 802 // Indentity matrix 803 const mat4 mIdentity; 804 805 // Indicates whether the clip must be restored 806 bool mDirtyClip; 807 808 // The following fields are used to setup drawing 809 // Used to describe the shaders to generate 810 ProgramDescription mDescription; 811 // Color description 812 bool mColorSet; 813 float mColorA, mColorR, mColorG, mColorB; 814 // Indicates that the shader should get a color 815 bool mSetShaderColor; 816 // Current texture unit 817 GLuint mTextureUnit; 818 // Track dirty regions, true by default 819 bool mTrackDirtyRegions; 820 // Indicate whether we are drawing an opaque frame 821 bool mOpaqueFrame; 822 823 friend class DisplayListRenderer; 824 825}; // class OpenGLRenderer 826 827}; // namespace uirenderer 828}; // namespace android 829 830#endif // ANDROID_HWUI_OPENGL_RENDERER_H 831