OpenGLRenderer.h revision 0baaac5e9adf3ee280ae1239e2e58754a9d2b099
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 230protected: 231 /** 232 * Compose the layer defined in the current snapshot with the layer 233 * defined by the previous snapshot. 234 * 235 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 236 * 237 * @param curent The current snapshot containing the layer to compose 238 * @param previous The previous snapshot to compose the current layer with 239 */ 240 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 241 242 /** 243 * Marks the specified region as dirty at the specified bounds. 244 */ 245 void dirtyLayerUnchecked(Rect& bounds, Region* region); 246 247 /** 248 * Returns the current snapshot. 249 */ 250 sp<Snapshot> getSnapshot() { 251 return mSnapshot; 252 } 253 254 /** 255 * Returns the region of the current layer. 256 */ 257 virtual Region* getRegion() { 258 return mSnapshot->region; 259 } 260 261 /** 262 * Indicates whether rendering is currently targeted at a layer. 263 */ 264 virtual bool hasLayer() { 265 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 266 } 267 268 /** 269 * Returns the name of the FBO this renderer is rendering into. 270 */ 271 virtual GLint getTargetFbo() { 272 return 0; 273 } 274 275 /** 276 * Renders the specified layer as a textured quad. 277 * 278 * @param layer The layer to render 279 * @param rect The bounds of the layer 280 */ 281 void drawTextureLayer(Layer* layer, const Rect& rect); 282 283 /** 284 * Gets the alpha and xfermode out of a paint object. If the paint is null 285 * alpha will be 255 and the xfermode will be SRC_OVER. 286 * 287 * @param paint The paint to extract values from 288 * @param alpha Where to store the resulting alpha 289 * @param mode Where to store the resulting xfermode 290 */ 291 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 292 293 /** 294 * Gets the alpha and xfermode out of a paint object. If the paint is null 295 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 296 * not multiply the paint's alpha by the current snapshot's alpha. 297 * 298 * @param paint The paint to extract values from 299 * @param alpha Where to store the resulting alpha 300 * @param mode Where to store the resulting xfermode 301 */ 302 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 303 if (paint) { 304 *mode = getXfermode(paint->getXfermode()); 305 306 // Skia draws using the color's alpha channel if < 255 307 // Otherwise, it uses the paint's alpha 308 int color = paint->getColor(); 309 *alpha = (color >> 24) & 0xFF; 310 if (*alpha == 255) { 311 *alpha = paint->getAlpha(); 312 } 313 } else { 314 *mode = SkXfermode::kSrcOver_Mode; 315 *alpha = 255; 316 } 317 } 318 319 /** 320 * Safely retrieves the mode from the specified xfermode. If the specified 321 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 322 */ 323 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 324 SkXfermode::Mode resultMode; 325 if (!SkXfermode::AsMode(mode, &resultMode)) { 326 resultMode = SkXfermode::kSrcOver_Mode; 327 } 328 return resultMode; 329 } 330 331private: 332 /** 333 * Ensures the state of the renderer is the same as the state of 334 * the GL context. 335 */ 336 void syncState(); 337 338 /** 339 * Saves the current state of the renderer as a new snapshot. 340 * The new snapshot is saved in mSnapshot and the previous snapshot 341 * is linked from mSnapshot->previous. 342 * 343 * @param flags The save flags; see SkCanvas for more information 344 * 345 * @return The new save count. This value can be passed to #restoreToCount() 346 */ 347 int saveSnapshot(int flags); 348 349 /** 350 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 351 * 352 * @return True if the clip was modified. 353 */ 354 bool restoreSnapshot(); 355 356 /** 357 * Sets the clipping rectangle using glScissor. The clip is defined by 358 * the current snapshot's clipRect member. 359 */ 360 void setScissorFromClip(); 361 362 /** 363 * Creates a new layer stored in the specified snapshot. 364 * 365 * @param snapshot The snapshot associated with the new layer 366 * @param left The left coordinate of the layer 367 * @param top The top coordinate of the layer 368 * @param right The right coordinate of the layer 369 * @param bottom The bottom coordinate of the layer 370 * @param alpha The translucency of the layer 371 * @param mode The blending mode of the layer 372 * @param flags The layer save flags 373 * @param previousFbo The name of the current framebuffer 374 * 375 * @return True if the layer was successfully created, false otherwise 376 */ 377 bool createLayer(float left, float top, float right, float bottom, 378 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 379 380 /** 381 * Creates a new layer stored in the specified snapshot as an FBO. 382 * 383 * @param layer The layer to store as an FBO 384 * @param snapshot The snapshot associated with the new layer 385 * @param bounds The bounds of the layer 386 * @param previousFbo The name of the current framebuffer 387 */ 388 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 389 390 /** 391 * Compose the specified layer as a region. 392 * 393 * @param layer The layer to compose 394 * @param rect The layer's bounds 395 */ 396 void composeLayerRegion(Layer* layer, const Rect& rect); 397 398 /** 399 * Compose the specified layer as a simple rectangle. 400 * 401 * @param layer The layer to compose 402 * @param rect The layer's bounds 403 * @param swap If true, the source and destination are swapped 404 */ 405 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 406 407 /** 408 * Clears all the regions corresponding to the current list of layers. 409 * This method MUST be invoked before any drawing operation. 410 */ 411 void clearLayerRegions(); 412 413 /** 414 * Mark the layer as dirty at the specified coordinates. The coordinates 415 * are transformed with the supplied matrix. 416 */ 417 void dirtyLayer(const float left, const float top, 418 const float right, const float bottom, const mat4 transform); 419 420 /** 421 * Mark the layer as dirty at the specified coordinates. 422 */ 423 void dirtyLayer(const float left, const float top, 424 const float right, const float bottom); 425 426 /** 427 * Draws a colored rectangle with the specified color. The specified coordinates 428 * are transformed by the current snapshot's transform matrix. 429 * 430 * @param left The left coordinate of the rectangle 431 * @param top The top coordinate of the rectangle 432 * @param right The right coordinate of the rectangle 433 * @param bottom The bottom coordinate of the rectangle 434 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 435 * @param mode The Skia xfermode to use 436 * @param ignoreTransform True if the current transform should be ignored 437 * @param ignoreBlending True if the blending is set by the caller 438 */ 439 void drawColorRect(float left, float top, float right, float bottom, 440 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 441 442 /** 443 * Draws the shape represented by the specified path texture. 444 * This method invokes drawPathTexture() but takes into account 445 * the extra left/top offset and the texture offset to correctly 446 * position the final shape. 447 * 448 * @param left The left coordinate of the shape to render 449 * @param top The top coordinate of the shape to render 450 * @param texture The texture reprsenting the shape 451 * @param paint The paint to draw the shape with 452 */ 453 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 454 455 /** 456 * Renders the rect defined by the specified bounds as a shape. 457 * This will render the rect using a path texture, which is used to render 458 * rects with stroke effects. 459 * 460 * @param left The left coordinate of the rect to draw 461 * @param top The top coordinate of the rect to draw 462 * @param right The right coordinate of the rect to draw 463 * @param bottom The bottom coordinate of the rect to draw 464 * @param p The paint to draw the rect with 465 */ 466 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 467 468 /** 469 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 470 * different compositing rules. 471 * 472 * @param texture The texture to draw with 473 * @param left The x coordinate of the bitmap 474 * @param top The y coordinate of the bitmap 475 * @param paint The paint to render with 476 */ 477 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 478 479 /** 480 * Renders the rect defined by the specified bounds as an anti-aliased rect. 481 * 482 * @param left The left coordinate of the rect to draw 483 * @param top The top coordinate of the rect to draw 484 * @param right The right coordinate of the rect to draw 485 * @param bottom The bottom coordinate of the rect to draw 486 * @param color The color of the rect 487 * @param mode The blending mode to draw the rect 488 */ 489 void drawAARect(float left, float top, float right, float bottom, 490 int color, SkXfermode::Mode mode); 491 492 /** 493 * Draws a textured rectangle with the specified texture. The specified coordinates 494 * are transformed by the current snapshot's transform matrix. 495 * 496 * @param left The left coordinate of the rectangle 497 * @param top The top coordinate of the rectangle 498 * @param right The right coordinate of the rectangle 499 * @param bottom The bottom coordinate of the rectangle 500 * @param texture The texture name to map onto the rectangle 501 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 502 * @param mode The blending mode 503 * @param blend True if the texture contains an alpha channel 504 */ 505 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 506 float alpha, SkXfermode::Mode mode, bool blend); 507 508 /** 509 * Draws a textured rectangle with the specified texture. The specified coordinates 510 * are transformed by the current snapshot's transform matrix. 511 * 512 * @param left The left coordinate of the rectangle 513 * @param top The top coordinate of the rectangle 514 * @param right The right coordinate of the rectangle 515 * @param bottom The bottom coordinate of the rectangle 516 * @param texture The texture to use 517 * @param paint The paint containing the alpha, blending mode, etc. 518 */ 519 void drawTextureRect(float left, float top, float right, float bottom, 520 Texture* texture, SkPaint* paint); 521 522 /** 523 * Draws a textured mesh with the specified texture. If the indices are omitted, 524 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 525 * VBO is bound. 526 * 527 * @param left The left coordinate of the rectangle 528 * @param top The top coordinate of the rectangle 529 * @param right The right coordinate of the rectangle 530 * @param bottom The bottom coordinate of the rectangle 531 * @param texture The texture name to map onto the rectangle 532 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 533 * @param mode The blending mode 534 * @param blend True if the texture contains an alpha channel 535 * @param vertices The vertices that define the mesh 536 * @param texCoords The texture coordinates of each vertex 537 * @param elementsCount The number of elements in the mesh, required by indices 538 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 539 * @param ignoreTransform True if the current transform should be ignored 540 * @param vbo The VBO used to draw the mesh 541 * @param ignoreScale True if the model view matrix should not be scaled 542 * @param dirty True if calling this method should dirty the current layer 543 */ 544 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 545 float alpha, SkXfermode::Mode mode, bool blend, 546 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 547 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 548 bool ignoreScale = false, bool dirty = true); 549 550 /** 551 * Draws text underline and strike-through if needed. 552 * 553 * @param text The text to decor 554 * @param bytesCount The number of bytes in the text 555 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 556 * @param x The x coordinate where the text will be drawn 557 * @param y The y coordinate where the text will be drawn 558 * @param paint The paint to draw the text with 559 */ 560 void drawTextDecorations(const char* text, int bytesCount, float length, 561 float x, float y, SkPaint* paint); 562 563 /** 564 * Draws shadow layer on text (with optional positions). 565 * 566 * @param paint The paint to draw the shadow with 567 * @param text The text to draw 568 * @param bytesCount The number of bytes in the text 569 * @param count The number of glyphs in the text 570 * @param positions The x, y positions of individual glyphs (or NULL) 571 * @param fontRenderer The font renderer object 572 * @param alpha The alpha value for drawing the shadow 573 * @param mode The xfermode for drawing the shadow 574 * @param x The x coordinate where the shadow will be drawn 575 * @param y The y coordinate where the shadow will be drawn 576 */ 577 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 578 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 579 float x, float y); 580 581 /** 582 * Draws a path texture. Path textures are alpha8 bitmaps that need special 583 * compositing to apply colors/filters/etc. 584 * 585 * @param texture The texture to render 586 * @param x The x coordinate where the texture will be drawn 587 * @param y The y coordinate where the texture will be drawn 588 * @param paint The paint to draw the texture with 589 */ 590 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 591 592 /** 593 * Resets the texture coordinates stored in mMeshVertices. Setting the values 594 * back to default is achieved by calling: 595 * 596 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 597 * 598 * @param u1 The left coordinate of the texture 599 * @param v1 The bottom coordinate of the texture 600 * @param u2 The right coordinate of the texture 601 * @param v2 The top coordinate of the texture 602 */ 603 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 604 605 /** 606 * Binds the specified texture. The texture unit must have been selected 607 * prior to calling this method. 608 */ 609 inline void bindTexture(GLuint texture) { 610 glBindTexture(GL_TEXTURE_2D, texture); 611 } 612 613 /** 614 * Binds the specified EGLImage texture. The texture unit must have been selected 615 * prior to calling this method. 616 */ 617 inline void bindExternalTexture(GLuint texture) { 618 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 619 } 620 621 /** 622 * Enable or disable blending as necessary. This function sets the appropriate 623 * blend function based on the specified xfermode. 624 */ 625 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 626 bool swapSrcDst = false); 627 628 /** 629 * Use the specified program with the current GL context. If the program is already 630 * in use, it will not be bound again. If it is not in use, the current program is 631 * marked unused and the specified program becomes used and becomes the new 632 * current program. 633 * 634 * @param program The program to use 635 * 636 * @return true If the specified program was already in use, false otherwise. 637 */ 638 inline bool useProgram(Program* program); 639 640 /** 641 * Invoked before any drawing operation. This sets required state. 642 */ 643 void setupDraw(bool clear = true); 644 645 /** 646 * Various methods to setup OpenGL rendering. 647 */ 648 void setupDrawWithTexture(bool isAlpha8 = false); 649 void setupDrawWithExternalTexture(); 650 void setupDrawNoTexture(); 651 void setupDrawAALine(); 652 void setupDrawPoint(float pointSize); 653 void setupDrawColor(int color); 654 void setupDrawColor(int color, int alpha); 655 void setupDrawColor(float r, float g, float b, float a); 656 void setupDrawAlpha8Color(int color, int alpha); 657 void setupDrawTextGamma(const SkPaint* paint); 658 void setupDrawShader(); 659 void setupDrawColorFilter(); 660 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 661 bool swapSrcDst = false); 662 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 663 bool swapSrcDst = false); 664 void setupDrawProgram(); 665 void setupDrawDirtyRegionsDisabled(); 666 void setupDrawModelViewIdentity(bool offset = false); 667 void setupDrawModelView(float left, float top, float right, float bottom, 668 bool ignoreTransform = false, bool ignoreModelView = false); 669 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 670 bool ignoreTransform = false); 671 void setupDrawPointUniforms(); 672 void setupDrawColorUniforms(); 673 void setupDrawPureColorUniforms(); 674 void setupDrawShaderIdentityUniforms(); 675 void setupDrawShaderUniforms(bool ignoreTransform = false); 676 void setupDrawColorFilterUniforms(); 677 void setupDrawSimpleMesh(); 678 void setupDrawTexture(GLuint texture); 679 void setupDrawExternalTexture(GLuint texture); 680 void setupDrawTextureTransform(); 681 void setupDrawTextureTransformUniforms(mat4& transform); 682 void setupDrawTextGammaUniforms(); 683 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 684 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 685 void setupDrawVertices(GLvoid* vertices); 686 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 687 float strokeWidth, int& widthSlot, int& lengthSlot); 688 void finishDrawAALine(const int widthSlot, const int lengthSlot); 689 void finishDrawTexture(); 690 void accountForClear(SkXfermode::Mode mode); 691 692 /** 693 * Renders the specified region as a series of rectangles. This method 694 * is used for debugging only. 695 */ 696 void drawRegionRects(const Region& region); 697 698 /** 699 * Should be invoked every time the glScissor is modified. 700 */ 701 inline void dirtyClip() { 702 mDirtyClip = true; 703 } 704 705 // Dimensions of the drawing surface 706 int mWidth, mHeight; 707 708 // Matrix used for ortho projection in shaders 709 mat4 mOrthoMatrix; 710 711 // Model-view matrix used to position/size objects 712 mat4 mModelView; 713 714 // Number of saved states 715 int mSaveCount; 716 // Base state 717 sp<Snapshot> mFirstSnapshot; 718 // Current state 719 sp<Snapshot> mSnapshot; 720 721 // Shaders 722 SkiaShader* mShader; 723 724 // Color filters 725 SkiaColorFilter* mColorFilter; 726 727 // Used to draw textured quads 728 TextureVertex mMeshVertices[4]; 729 730 // Drop shadow 731 bool mHasShadow; 732 float mShadowRadius; 733 float mShadowDx; 734 float mShadowDy; 735 int mShadowColor; 736 737 // Draw filters 738 bool mHasDrawFilter; 739 int mPaintFilterClearBits; 740 int mPaintFilterSetBits; 741 SkPaint mFilteredPaint; 742 743 // Various caches 744 Caches& mCaches; 745 746 // List of rectangles to clear after saveLayer() is invoked 747 Vector<Rect*> mLayers; 748 // List of functors to invoke after a frame is drawn 749 SortedVector<Functor*> mFunctors; 750 751 // Indentity matrix 752 const mat4 mIdentity; 753 754 // Indicates whether the clip must be restored 755 bool mDirtyClip; 756 757 // The following fields are used to setup drawing 758 // Used to describe the shaders to generate 759 ProgramDescription mDescription; 760 // Color description 761 bool mColorSet; 762 float mColorA, mColorR, mColorG, mColorB; 763 // Indicates that the shader should get a color 764 bool mSetShaderColor; 765 // Current texture unit 766 GLuint mTextureUnit; 767 // Track dirty regions, true by default 768 bool mTrackDirtyRegions; 769 770 friend class DisplayListRenderer; 771 772}; // class OpenGLRenderer 773 774}; // namespace uirenderer 775}; // namespace android 776 777#endif // ANDROID_HWUI_OPENGL_RENDERER_H 778