OpenGLRenderer.h revision 35643ddc689913f5b5f80ceed864470d987bd6cd
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 int getSaveCount() const; 136 virtual int save(int flags); 137 virtual void restore(); 138 virtual void restoreToCount(int saveCount); 139 140 virtual int saveLayer(float left, float top, float right, float bottom, 141 SkPaint* p, int flags); 142 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 143 int alpha, int flags); 144 145 virtual void translate(float dx, float dy); 146 virtual void rotate(float degrees); 147 virtual void scale(float sx, float sy); 148 virtual void skew(float sx, float sy); 149 150 ANDROID_API void getMatrix(SkMatrix* matrix); 151 virtual void setMatrix(SkMatrix* matrix); 152 virtual void concatMatrix(SkMatrix* matrix); 153 154 ANDROID_API const Rect& getClipBounds(); 155 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 156 bool quickRejectNoScissor(float left, float top, float right, float bottom); 157 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 158 virtual Rect* getClipRect(); 159 160 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 161 uint32_t level = 0); 162 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 163 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 164 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 165 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 166 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 167 float srcRight, float srcBottom, float dstLeft, float dstTop, 168 float dstRight, float dstBottom, SkPaint* paint); 169 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 170 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 171 float* vertices, int* colors, SkPaint* paint); 172 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 173 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 174 float left, float top, float right, float bottom, SkPaint* paint); 175 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, int alpha, SkXfermode::Mode mode); 178 virtual status_t drawColor(int color, SkXfermode::Mode mode); 179 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 180 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 181 float rx, float ry, SkPaint* paint); 182 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 183 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 184 virtual status_t drawArc(float left, float top, float right, float bottom, 185 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 186 virtual status_t drawPath(SkPath* path, SkPaint* paint); 187 virtual status_t drawLines(float* points, int count, SkPaint* paint); 188 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 189 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 190 float hOffset, float vOffset, SkPaint* paint); 191 virtual status_t drawPosText(const char* text, int bytesCount, int count, 192 const float* positions, SkPaint* paint); 193 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 194 const float* positions, SkPaint* paint, float length = -1.0f); 195 196 virtual void resetShader(); 197 virtual void setupShader(SkiaShader* shader); 198 199 virtual void resetColorFilter(); 200 virtual void setupColorFilter(SkiaColorFilter* filter); 201 202 virtual void resetShadow(); 203 virtual void setupShadow(float radius, float dx, float dy, int color); 204 205 virtual void resetPaintFilter(); 206 virtual void setupPaintFilter(int clearBits, int setBits); 207 208 SkPaint* filterPaint(SkPaint* paint); 209 210 /** 211 * Sets the alpha on the current snapshot. This alpha value will be modulated 212 * with other alpha values when drawing primitives. 213 */ 214 void setAlpha(float alpha) { 215 mSnapshot->alpha = alpha; 216 } 217 218 /** 219 * Inserts a named group marker in the stream of GL commands. This marker 220 * can be used by tools to group commands into logical groups. A call to 221 * this method must always be followed later on by a call to endMark(). 222 */ 223 void startMark(const char* name) const; 224 225 /** 226 * Closes the last group marker opened by startMark(). 227 */ 228 void endMark() const; 229 230 /** 231 * Gets the alpha and xfermode out of a paint object. If the paint is null 232 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 233 * not multiply the paint's alpha by the current snapshot's alpha. 234 * 235 * @param paint The paint to extract values from 236 * @param alpha Where to store the resulting alpha 237 * @param mode Where to store the resulting xfermode 238 */ 239 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 240 if (paint) { 241 *mode = getXfermode(paint->getXfermode()); 242 243 // Skia draws using the color's alpha channel if < 255 244 // Otherwise, it uses the paint's alpha 245 int color = paint->getColor(); 246 *alpha = (color >> 24) & 0xFF; 247 if (*alpha == 255) { 248 *alpha = paint->getAlpha(); 249 } 250 } else { 251 *mode = SkXfermode::kSrcOver_Mode; 252 *alpha = 255; 253 } 254 } 255 256protected: 257 /** 258 * Computes the projection matrix, initialize the first snapshot 259 * and stores the dimensions of the render target. 260 */ 261 void initViewport(int width, int height); 262 263 /** 264 * Call this method after updating a layer during a drawing pass. 265 */ 266 void resumeAfterLayer(); 267 268 /** 269 * Compose the layer defined in the current snapshot with the layer 270 * defined by the previous snapshot. 271 * 272 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 273 * 274 * @param curent The current snapshot containing the layer to compose 275 * @param previous The previous snapshot to compose the current layer with 276 */ 277 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 278 279 /** 280 * Marks the specified region as dirty at the specified bounds. 281 */ 282 void dirtyLayerUnchecked(Rect& bounds, Region* region); 283 284 /** 285 * Returns the current snapshot. 286 */ 287 sp<Snapshot> getSnapshot() { 288 return mSnapshot; 289 } 290 291 /** 292 * Returns the region of the current layer. 293 */ 294 virtual Region* getRegion() { 295 return mSnapshot->region; 296 } 297 298 /** 299 * Indicates whether rendering is currently targeted at a layer. 300 */ 301 virtual bool hasLayer() { 302 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 303 } 304 305 /** 306 * Returns the name of the FBO this renderer is rendering into. 307 */ 308 virtual GLint getTargetFbo() { 309 return 0; 310 } 311 312 /** 313 * Renders the specified layer as a textured quad. 314 * 315 * @param layer The layer to render 316 * @param rect The bounds of the layer 317 */ 318 void drawTextureLayer(Layer* layer, const Rect& rect); 319 320 /** 321 * Gets the alpha and xfermode out of a paint object. If the paint is null 322 * alpha will be 255 and the xfermode will be SRC_OVER. 323 * 324 * @param paint The paint to extract values from 325 * @param alpha Where to store the resulting alpha 326 * @param mode Where to store the resulting xfermode 327 */ 328 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 329 330 /** 331 * Safely retrieves the mode from the specified xfermode. If the specified 332 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 333 */ 334 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 335 SkXfermode::Mode resultMode; 336 if (!SkXfermode::AsMode(mode, &resultMode)) { 337 resultMode = SkXfermode::kSrcOver_Mode; 338 } 339 return resultMode; 340 } 341 342private: 343 /** 344 * Ensures the state of the renderer is the same as the state of 345 * the GL context. 346 */ 347 void syncState(); 348 349 /** 350 * Saves the current state of the renderer as a new snapshot. 351 * The new snapshot is saved in mSnapshot and the previous snapshot 352 * is linked from mSnapshot->previous. 353 * 354 * @param flags The save flags; see SkCanvas for more information 355 * 356 * @return The new save count. This value can be passed to #restoreToCount() 357 */ 358 int saveSnapshot(int flags); 359 360 /** 361 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 362 * 363 * @return True if the clip was modified. 364 */ 365 bool restoreSnapshot(); 366 367 /** 368 * Sets the clipping rectangle using glScissor. The clip is defined by 369 * the current snapshot's clipRect member. 370 */ 371 void setScissorFromClip(); 372 373 /** 374 * Performs a quick reject but does not affect the scissor. Returns 375 * the transformed rect to test and the current clip. 376 */ 377 bool quickRejectNoScissor(float left, float top, float right, float bottom, 378 Rect& transformed, Rect& clip); 379 380 /** 381 * Creates a new layer stored in the specified snapshot. 382 * 383 * @param snapshot The snapshot associated with the new layer 384 * @param left The left coordinate of the layer 385 * @param top The top coordinate of the layer 386 * @param right The right coordinate of the layer 387 * @param bottom The bottom coordinate of the layer 388 * @param alpha The translucency of the layer 389 * @param mode The blending mode of the layer 390 * @param flags The layer save flags 391 * @param previousFbo The name of the current framebuffer 392 * 393 * @return True if the layer was successfully created, false otherwise 394 */ 395 bool createLayer(float left, float top, float right, float bottom, 396 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 397 398 /** 399 * Creates a new layer stored in the specified snapshot as an FBO. 400 * 401 * @param layer The layer to store as an FBO 402 * @param snapshot The snapshot associated with the new layer 403 * @param bounds The bounds of the layer 404 * @param previousFbo The name of the current framebuffer 405 */ 406 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 407 408 /** 409 * Compose the specified layer as a region. 410 * 411 * @param layer The layer to compose 412 * @param rect The layer's bounds 413 */ 414 void composeLayerRegion(Layer* layer, const Rect& rect); 415 416 /** 417 * Compose the specified layer as a simple rectangle. 418 * 419 * @param layer The layer to compose 420 * @param rect The layer's bounds 421 * @param swap If true, the source and destination are swapped 422 */ 423 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 424 425 /** 426 * Clears all the regions corresponding to the current list of layers. 427 * This method MUST be invoked before any drawing operation. 428 */ 429 void clearLayerRegions(); 430 431 /** 432 * Mark the layer as dirty at the specified coordinates. The coordinates 433 * are transformed with the supplied matrix. 434 */ 435 void dirtyLayer(const float left, const float top, 436 const float right, const float bottom, const mat4 transform); 437 438 /** 439 * Mark the layer as dirty at the specified coordinates. 440 */ 441 void dirtyLayer(const float left, const float top, 442 const float right, const float bottom); 443 444 /** 445 * Draws a colored rectangle with the specified color. The specified coordinates 446 * are transformed by the current snapshot's transform matrix. 447 * 448 * @param left The left coordinate of the rectangle 449 * @param top The top coordinate of the rectangle 450 * @param right The right coordinate of the rectangle 451 * @param bottom The bottom coordinate of the rectangle 452 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 453 * @param mode The Skia xfermode to use 454 * @param ignoreTransform True if the current transform should be ignored 455 */ 456 void drawColorRect(float left, float top, float right, float bottom, 457 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 458 459 /** 460 * Draws the shape represented by the specified path texture. 461 * This method invokes drawPathTexture() but takes into account 462 * the extra left/top offset and the texture offset to correctly 463 * position the final shape. 464 * 465 * @param left The left coordinate of the shape to render 466 * @param top The top coordinate of the shape to render 467 * @param texture The texture reprsenting the shape 468 * @param paint The paint to draw the shape with 469 */ 470 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 471 472 /** 473 * Renders the rect defined by the specified bounds as a shape. 474 * This will render the rect using a path texture, which is used to render 475 * rects with stroke effects. 476 * 477 * @param left The left coordinate of the rect to draw 478 * @param top The top coordinate of the rect to draw 479 * @param right The right coordinate of the rect to draw 480 * @param bottom The bottom coordinate of the rect to draw 481 * @param p The paint to draw the rect with 482 */ 483 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 484 485 /** 486 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 487 * different compositing rules. 488 * 489 * @param texture The texture to draw with 490 * @param left The x coordinate of the bitmap 491 * @param top The y coordinate of the bitmap 492 * @param paint The paint to render with 493 */ 494 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 495 496 /** 497 * Renders the rect defined by the specified bounds as an anti-aliased rect. 498 * 499 * @param left The left coordinate of the rect to draw 500 * @param top The top coordinate of the rect to draw 501 * @param right The right coordinate of the rect to draw 502 * @param bottom The bottom coordinate of the rect to draw 503 * @param color The color of the rect 504 * @param mode The blending mode to draw the rect 505 */ 506 void drawAARect(float left, float top, float right, float bottom, 507 int color, SkXfermode::Mode mode); 508 509 /** 510 * Draws a textured rectangle with the specified texture. The specified coordinates 511 * are transformed by the current snapshot's transform matrix. 512 * 513 * @param left The left coordinate of the rectangle 514 * @param top The top coordinate of the rectangle 515 * @param right The right coordinate of the rectangle 516 * @param bottom The bottom coordinate of the rectangle 517 * @param texture The texture name to map onto the rectangle 518 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 519 * @param mode The blending mode 520 * @param blend True if the texture contains an alpha channel 521 */ 522 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 523 float alpha, SkXfermode::Mode mode, bool blend); 524 525 /** 526 * Draws a textured rectangle with the specified texture. The specified coordinates 527 * are transformed by the current snapshot's transform matrix. 528 * 529 * @param left The left coordinate of the rectangle 530 * @param top The top coordinate of the rectangle 531 * @param right The right coordinate of the rectangle 532 * @param bottom The bottom coordinate of the rectangle 533 * @param texture The texture to use 534 * @param paint The paint containing the alpha, blending mode, etc. 535 */ 536 void drawTextureRect(float left, float top, float right, float bottom, 537 Texture* texture, SkPaint* paint); 538 539 /** 540 * Draws a textured mesh with the specified texture. If the indices are omitted, 541 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 542 * VBO is bound. 543 * 544 * @param left The left coordinate of the rectangle 545 * @param top The top coordinate of the rectangle 546 * @param right The right coordinate of the rectangle 547 * @param bottom The bottom coordinate of the rectangle 548 * @param texture The texture name to map onto the rectangle 549 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 550 * @param mode The blending mode 551 * @param blend True if the texture contains an alpha channel 552 * @param vertices The vertices that define the mesh 553 * @param texCoords The texture coordinates of each vertex 554 * @param elementsCount The number of elements in the mesh, required by indices 555 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 556 * @param ignoreTransform True if the current transform should be ignored 557 * @param vbo The VBO used to draw the mesh 558 * @param ignoreScale True if the model view matrix should not be scaled 559 * @param dirty True if calling this method should dirty the current layer 560 */ 561 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 562 float alpha, SkXfermode::Mode mode, bool blend, 563 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 564 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 565 bool ignoreScale = false, bool dirty = true); 566 567 /** 568 * Draws text underline and strike-through if needed. 569 * 570 * @param text The text to decor 571 * @param bytesCount The number of bytes in the text 572 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 573 * @param x The x coordinate where the text will be drawn 574 * @param y The y coordinate where the text will be drawn 575 * @param paint The paint to draw the text with 576 */ 577 void drawTextDecorations(const char* text, int bytesCount, float length, 578 float x, float y, SkPaint* paint); 579 580 /** 581 * Draws shadow layer on text (with optional positions). 582 * 583 * @param paint The paint to draw the shadow with 584 * @param text The text to draw 585 * @param bytesCount The number of bytes in the text 586 * @param count The number of glyphs in the text 587 * @param positions The x, y positions of individual glyphs (or NULL) 588 * @param fontRenderer The font renderer object 589 * @param alpha The alpha value for drawing the shadow 590 * @param mode The xfermode for drawing the shadow 591 * @param x The x coordinate where the shadow will be drawn 592 * @param y The y coordinate where the shadow will be drawn 593 */ 594 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 595 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 596 float x, float y); 597 598 /** 599 * Draws a path texture. Path textures are alpha8 bitmaps that need special 600 * compositing to apply colors/filters/etc. 601 * 602 * @param texture The texture to render 603 * @param x The x coordinate where the texture will be drawn 604 * @param y The y coordinate where the texture will be drawn 605 * @param paint The paint to draw the texture with 606 */ 607 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 608 609 /** 610 * Resets the texture coordinates stored in mMeshVertices. Setting the values 611 * back to default is achieved by calling: 612 * 613 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 614 * 615 * @param u1 The left coordinate of the texture 616 * @param v1 The bottom coordinate of the texture 617 * @param u2 The right coordinate of the texture 618 * @param v2 The top coordinate of the texture 619 */ 620 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 621 622 /** 623 * Binds the specified texture. The texture unit must have been selected 624 * prior to calling this method. 625 */ 626 inline void bindTexture(GLuint texture) { 627 glBindTexture(GL_TEXTURE_2D, texture); 628 } 629 630 /** 631 * Binds the specified EGLImage texture. The texture unit must have been selected 632 * prior to calling this method. 633 */ 634 inline void bindExternalTexture(GLuint texture) { 635 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 636 } 637 638 /** 639 * Enable or disable blending as necessary. This function sets the appropriate 640 * blend function based on the specified xfermode. 641 */ 642 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 643 bool swapSrcDst = false); 644 645 /** 646 * Use the specified program with the current GL context. If the program is already 647 * in use, it will not be bound again. If it is not in use, the current program is 648 * marked unused and the specified program becomes used and becomes the new 649 * current program. 650 * 651 * @param program The program to use 652 * 653 * @return true If the specified program was already in use, false otherwise. 654 */ 655 inline bool useProgram(Program* program); 656 657 /** 658 * Invoked before any drawing operation. This sets required state. 659 */ 660 void setupDraw(bool clear = true); 661 662 /** 663 * Various methods to setup OpenGL rendering. 664 */ 665 void setupDrawWithTexture(bool isAlpha8 = false); 666 void setupDrawWithExternalTexture(); 667 void setupDrawNoTexture(); 668 void setupDrawAALine(); 669 void setupDrawAARect(); 670 void setupDrawPoint(float pointSize); 671 void setupDrawColor(int color); 672 void setupDrawColor(int color, int alpha); 673 void setupDrawColor(float r, float g, float b, float a); 674 void setupDrawAlpha8Color(int color, int alpha); 675 void setupDrawTextGamma(const SkPaint* paint); 676 void setupDrawShader(); 677 void setupDrawColorFilter(); 678 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 679 bool swapSrcDst = false); 680 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 681 bool swapSrcDst = false); 682 void setupDrawProgram(); 683 void setupDrawDirtyRegionsDisabled(); 684 void setupDrawModelViewIdentity(bool offset = false); 685 void setupDrawModelView(float left, float top, float right, float bottom, 686 bool ignoreTransform = false, bool ignoreModelView = false); 687 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 688 bool ignoreTransform = false); 689 void setupDrawPointUniforms(); 690 void setupDrawColorUniforms(); 691 void setupDrawPureColorUniforms(); 692 void setupDrawShaderIdentityUniforms(); 693 void setupDrawShaderUniforms(bool ignoreTransform = false); 694 void setupDrawColorFilterUniforms(); 695 void setupDrawSimpleMesh(); 696 void setupDrawTexture(GLuint texture); 697 void setupDrawExternalTexture(GLuint texture); 698 void setupDrawTextureTransform(); 699 void setupDrawTextureTransformUniforms(mat4& transform); 700 void setupDrawTextGammaUniforms(); 701 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 702 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 703 void setupDrawVertices(GLvoid* vertices); 704 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 705 float strokeWidth, int& widthSlot, int& lengthSlot); 706 void finishDrawAALine(const int widthSlot, const int lengthSlot); 707 void finishDrawTexture(); 708 void accountForClear(SkXfermode::Mode mode); 709 710 /** 711 * Renders the specified region as a series of rectangles. This method 712 * is used for debugging only. 713 */ 714 void drawRegionRects(const Region& region); 715 716 /** 717 * Should be invoked every time the glScissor is modified. 718 */ 719 inline void dirtyClip() { 720 mDirtyClip = true; 721 } 722 723 // Dimensions of the drawing surface 724 int mWidth, mHeight; 725 726 // Matrix used for ortho projection in shaders 727 mat4 mOrthoMatrix; 728 729 // Model-view matrix used to position/size objects 730 mat4 mModelView; 731 732 // Number of saved states 733 int mSaveCount; 734 // Base state 735 sp<Snapshot> mFirstSnapshot; 736 // Current state 737 sp<Snapshot> mSnapshot; 738 739 // Shaders 740 SkiaShader* mShader; 741 742 // Color filters 743 SkiaColorFilter* mColorFilter; 744 745 // Used to draw textured quads 746 TextureVertex mMeshVertices[4]; 747 748 // Drop shadow 749 bool mHasShadow; 750 float mShadowRadius; 751 float mShadowDx; 752 float mShadowDy; 753 int mShadowColor; 754 755 // Draw filters 756 bool mHasDrawFilter; 757 int mPaintFilterClearBits; 758 int mPaintFilterSetBits; 759 SkPaint mFilteredPaint; 760 761 // Various caches 762 Caches& mCaches; 763 764 // List of rectangles to clear after saveLayer() is invoked 765 Vector<Rect*> mLayers; 766 // List of functors to invoke after a frame is drawn 767 SortedVector<Functor*> mFunctors; 768 769 // Indentity matrix 770 const mat4 mIdentity; 771 772 // Indicates whether the clip must be restored 773 bool mDirtyClip; 774 775 // The following fields are used to setup drawing 776 // Used to describe the shaders to generate 777 ProgramDescription mDescription; 778 // Color description 779 bool mColorSet; 780 float mColorA, mColorR, mColorG, mColorB; 781 // Indicates that the shader should get a color 782 bool mSetShaderColor; 783 // Current texture unit 784 GLuint mTextureUnit; 785 // Track dirty regions, true by default 786 bool mTrackDirtyRegions; 787 788 friend class DisplayListRenderer; 789 790}; // class OpenGLRenderer 791 792}; // namespace uirenderer 793}; // namespace android 794 795#endif // ANDROID_HWUI_OPENGL_RENDERER_H 796