OpenGLRenderer.h revision 6ebdc114e0d72137394f02bc8ffe9d7a782a65c4
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 * Returns the desired size for the stencil buffer. If the returned value 212 * is 0, then no stencil buffer is required. 213 */ 214 ANDROID_API static uint32_t getStencilSize(); 215 216 /** 217 * Sets the alpha on the current snapshot. This alpha value will be modulated 218 * with other alpha values when drawing primitives. 219 */ 220 void setAlpha(float alpha) { 221 mSnapshot->alpha = alpha; 222 } 223 224 /** 225 * Inserts a named group marker in the stream of GL commands. This marker 226 * can be used by tools to group commands into logical groups. A call to 227 * this method must always be followed later on by a call to endMark(). 228 */ 229 void startMark(const char* name) const; 230 231 /** 232 * Closes the last group marker opened by startMark(). 233 */ 234 void endMark() const; 235 236protected: 237 /** 238 * Compose the layer defined in the current snapshot with the layer 239 * defined by the previous snapshot. 240 * 241 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 242 * 243 * @param curent The current snapshot containing the layer to compose 244 * @param previous The previous snapshot to compose the current layer with 245 */ 246 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 247 248 /** 249 * Marks the specified region as dirty at the specified bounds. 250 */ 251 void dirtyLayerUnchecked(Rect& bounds, Region* region); 252 253 /** 254 * Returns the current snapshot. 255 */ 256 sp<Snapshot> getSnapshot() { 257 return mSnapshot; 258 } 259 260 /** 261 * Returns the region of the current layer. 262 */ 263 virtual Region* getRegion() { 264 return mSnapshot->region; 265 } 266 267 /** 268 * Indicates whether rendering is currently targeted at a layer. 269 */ 270 virtual bool hasLayer() { 271 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 272 } 273 274 /** 275 * Returns the name of the FBO this renderer is rendering into. 276 */ 277 virtual GLint getTargetFbo() { 278 return 0; 279 } 280 281 /** 282 * Renders the specified layer as a textured quad. 283 * 284 * @param layer The layer to render 285 * @param rect The bounds of the layer 286 */ 287 void drawTextureLayer(Layer* layer, const Rect& rect); 288 289 /** 290 * Gets the alpha and xfermode out of a paint object. If the paint is null 291 * alpha will be 255 and the xfermode will be SRC_OVER. 292 * 293 * @param paint The paint to extract values from 294 * @param alpha Where to store the resulting alpha 295 * @param mode Where to store the resulting xfermode 296 */ 297 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 298 299 /** 300 * Gets the alpha and xfermode out of a paint object. If the paint is null 301 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 302 * not multiply the paint's alpha by the current snapshot's alpha. 303 * 304 * @param paint The paint to extract values from 305 * @param alpha Where to store the resulting alpha 306 * @param mode Where to store the resulting xfermode 307 */ 308 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 309 if (paint) { 310 *mode = getXfermode(paint->getXfermode()); 311 312 // Skia draws using the color's alpha channel if < 255 313 // Otherwise, it uses the paint's alpha 314 int color = paint->getColor(); 315 *alpha = (color >> 24) & 0xFF; 316 if (*alpha == 255) { 317 *alpha = paint->getAlpha(); 318 } 319 } else { 320 *mode = SkXfermode::kSrcOver_Mode; 321 *alpha = 255; 322 } 323 } 324 325 /** 326 * Safely retrieves the mode from the specified xfermode. If the specified 327 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 328 */ 329 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 330 SkXfermode::Mode resultMode; 331 if (!SkXfermode::AsMode(mode, &resultMode)) { 332 resultMode = SkXfermode::kSrcOver_Mode; 333 } 334 return resultMode; 335 } 336 337private: 338 /** 339 * Ensures the state of the renderer is the same as the state of 340 * the GL context. 341 */ 342 void syncState(); 343 344 /** 345 * Saves the current state of the renderer as a new snapshot. 346 * The new snapshot is saved in mSnapshot and the previous snapshot 347 * is linked from mSnapshot->previous. 348 * 349 * @param flags The save flags; see SkCanvas for more information 350 * 351 * @return The new save count. This value can be passed to #restoreToCount() 352 */ 353 int saveSnapshot(int flags); 354 355 /** 356 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 357 * 358 * @return True if the clip was modified. 359 */ 360 bool restoreSnapshot(); 361 362 /** 363 * Sets the clipping rectangle using glScissor. The clip is defined by 364 * the current snapshot's clipRect member. 365 */ 366 void setScissorFromClip(); 367 368 /** 369 * Creates a new layer stored in the specified snapshot. 370 * 371 * @param snapshot The snapshot associated with the new layer 372 * @param left The left coordinate of the layer 373 * @param top The top coordinate of the layer 374 * @param right The right coordinate of the layer 375 * @param bottom The bottom coordinate of the layer 376 * @param alpha The translucency of the layer 377 * @param mode The blending mode of the layer 378 * @param flags The layer save flags 379 * @param previousFbo The name of the current framebuffer 380 * 381 * @return True if the layer was successfully created, false otherwise 382 */ 383 bool createLayer(float left, float top, float right, float bottom, 384 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 385 386 /** 387 * Creates a new layer stored in the specified snapshot as an FBO. 388 * 389 * @param layer The layer to store as an FBO 390 * @param snapshot The snapshot associated with the new layer 391 * @param bounds The bounds of the layer 392 * @param previousFbo The name of the current framebuffer 393 */ 394 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 395 396 /** 397 * Compose the specified layer as a region. 398 * 399 * @param layer The layer to compose 400 * @param rect The layer's bounds 401 */ 402 void composeLayerRegion(Layer* layer, const Rect& rect); 403 404 /** 405 * Compose the specified layer as a simple rectangle. 406 * 407 * @param layer The layer to compose 408 * @param rect The layer's bounds 409 * @param swap If true, the source and destination are swapped 410 */ 411 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 412 413 /** 414 * Clears all the regions corresponding to the current list of layers. 415 * This method MUST be invoked before any drawing operation. 416 */ 417 void clearLayerRegions(); 418 419 /** 420 * Mark the layer as dirty at the specified coordinates. The coordinates 421 * are transformed with the supplied matrix. 422 */ 423 void dirtyLayer(const float left, const float top, 424 const float right, const float bottom, const mat4 transform); 425 426 /** 427 * Mark the layer as dirty at the specified coordinates. 428 */ 429 void dirtyLayer(const float left, const float top, 430 const float right, const float bottom); 431 432 /** 433 * Draws a colored rectangle with the specified color. The specified coordinates 434 * are transformed by the current snapshot's transform matrix. 435 * 436 * @param left The left coordinate of the rectangle 437 * @param top The top coordinate of the rectangle 438 * @param right The right coordinate of the rectangle 439 * @param bottom The bottom coordinate of the rectangle 440 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 441 * @param mode The Skia xfermode to use 442 * @param ignoreTransform True if the current transform should be ignored 443 */ 444 void drawColorRect(float left, float top, float right, float bottom, 445 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 446 447 /** 448 * Draws the shape represented by the specified path texture. 449 * This method invokes drawPathTexture() but takes into account 450 * the extra left/top offset and the texture offset to correctly 451 * position the final shape. 452 * 453 * @param left The left coordinate of the shape to render 454 * @param top The top coordinate of the shape to render 455 * @param texture The texture reprsenting the shape 456 * @param paint The paint to draw the shape with 457 */ 458 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 459 460 /** 461 * Renders the rect defined by the specified bounds as a shape. 462 * This will render the rect using a path texture, which is used to render 463 * rects with stroke effects. 464 * 465 * @param left The left coordinate of the rect to draw 466 * @param top The top coordinate of the rect to draw 467 * @param right The right coordinate of the rect to draw 468 * @param bottom The bottom coordinate of the rect to draw 469 * @param p The paint to draw the rect with 470 */ 471 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 472 473 /** 474 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 475 * different compositing rules. 476 * 477 * @param texture The texture to draw with 478 * @param left The x coordinate of the bitmap 479 * @param top The y coordinate of the bitmap 480 * @param paint The paint to render with 481 */ 482 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 483 484 /** 485 * Renders the rect defined by the specified bounds as an anti-aliased rect. 486 * 487 * @param left The left coordinate of the rect to draw 488 * @param top The top coordinate of the rect to draw 489 * @param right The right coordinate of the rect to draw 490 * @param bottom The bottom coordinate of the rect to draw 491 * @param color The color of the rect 492 * @param mode The blending mode to draw the rect 493 */ 494 void drawAARect(float left, float top, float right, float bottom, 495 int color, SkXfermode::Mode mode); 496 497 /** 498 * Draws a textured rectangle with the specified texture. The specified coordinates 499 * are transformed by the current snapshot's transform matrix. 500 * 501 * @param left The left coordinate of the rectangle 502 * @param top The top coordinate of the rectangle 503 * @param right The right coordinate of the rectangle 504 * @param bottom The bottom coordinate of the rectangle 505 * @param texture The texture name to map onto the rectangle 506 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 507 * @param mode The blending mode 508 * @param blend True if the texture contains an alpha channel 509 */ 510 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 511 float alpha, SkXfermode::Mode mode, bool blend); 512 513 /** 514 * Draws a textured rectangle with the specified texture. The specified coordinates 515 * are transformed by the current snapshot's transform matrix. 516 * 517 * @param left The left coordinate of the rectangle 518 * @param top The top coordinate of the rectangle 519 * @param right The right coordinate of the rectangle 520 * @param bottom The bottom coordinate of the rectangle 521 * @param texture The texture to use 522 * @param paint The paint containing the alpha, blending mode, etc. 523 */ 524 void drawTextureRect(float left, float top, float right, float bottom, 525 Texture* texture, SkPaint* paint); 526 527 /** 528 * Draws a textured mesh with the specified texture. If the indices are omitted, 529 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 530 * VBO is bound. 531 * 532 * @param left The left coordinate of the rectangle 533 * @param top The top coordinate of the rectangle 534 * @param right The right coordinate of the rectangle 535 * @param bottom The bottom coordinate of the rectangle 536 * @param texture The texture name to map onto the rectangle 537 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 538 * @param mode The blending mode 539 * @param blend True if the texture contains an alpha channel 540 * @param vertices The vertices that define the mesh 541 * @param texCoords The texture coordinates of each vertex 542 * @param elementsCount The number of elements in the mesh, required by indices 543 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 544 * @param ignoreTransform True if the current transform should be ignored 545 * @param vbo The VBO used to draw the mesh 546 * @param ignoreScale True if the model view matrix should not be scaled 547 * @param dirty True if calling this method should dirty the current layer 548 */ 549 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 550 float alpha, SkXfermode::Mode mode, bool blend, 551 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 552 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 553 bool ignoreScale = false, bool dirty = true); 554 555 /** 556 * Draws text underline and strike-through if needed. 557 * 558 * @param text The text to decor 559 * @param bytesCount The number of bytes in the text 560 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 561 * @param x The x coordinate where the text will be drawn 562 * @param y The y coordinate where the text will be drawn 563 * @param paint The paint to draw the text with 564 */ 565 void drawTextDecorations(const char* text, int bytesCount, float length, 566 float x, float y, SkPaint* paint); 567 568 /** 569 * Draws shadow layer on text (with optional positions). 570 * 571 * @param paint The paint to draw the shadow with 572 * @param text The text to draw 573 * @param bytesCount The number of bytes in the text 574 * @param count The number of glyphs in the text 575 * @param positions The x, y positions of individual glyphs (or NULL) 576 * @param fontRenderer The font renderer object 577 * @param alpha The alpha value for drawing the shadow 578 * @param mode The xfermode for drawing the shadow 579 * @param x The x coordinate where the shadow will be drawn 580 * @param y The y coordinate where the shadow will be drawn 581 */ 582 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 583 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 584 float x, float y); 585 586 /** 587 * Draws a path texture. Path textures are alpha8 bitmaps that need special 588 * compositing to apply colors/filters/etc. 589 * 590 * @param texture The texture to render 591 * @param x The x coordinate where the texture will be drawn 592 * @param y The y coordinate where the texture will be drawn 593 * @param paint The paint to draw the texture with 594 */ 595 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 596 597 /** 598 * Resets the texture coordinates stored in mMeshVertices. Setting the values 599 * back to default is achieved by calling: 600 * 601 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 602 * 603 * @param u1 The left coordinate of the texture 604 * @param v1 The bottom coordinate of the texture 605 * @param u2 The right coordinate of the texture 606 * @param v2 The top coordinate of the texture 607 */ 608 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 609 610 /** 611 * Binds the specified texture. The texture unit must have been selected 612 * prior to calling this method. 613 */ 614 inline void bindTexture(GLuint texture) { 615 glBindTexture(GL_TEXTURE_2D, texture); 616 } 617 618 /** 619 * Binds the specified EGLImage texture. The texture unit must have been selected 620 * prior to calling this method. 621 */ 622 inline void bindExternalTexture(GLuint texture) { 623 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 624 } 625 626 /** 627 * Enable or disable blending as necessary. This function sets the appropriate 628 * blend function based on the specified xfermode. 629 */ 630 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 631 bool swapSrcDst = false); 632 633 /** 634 * Use the specified program with the current GL context. If the program is already 635 * in use, it will not be bound again. If it is not in use, the current program is 636 * marked unused and the specified program becomes used and becomes the new 637 * current program. 638 * 639 * @param program The program to use 640 * 641 * @return true If the specified program was already in use, false otherwise. 642 */ 643 inline bool useProgram(Program* program); 644 645 /** 646 * Invoked before any drawing operation. This sets required state. 647 */ 648 void setupDraw(bool clear = true); 649 650 /** 651 * Various methods to setup OpenGL rendering. 652 */ 653 void setupDrawWithTexture(bool isAlpha8 = false); 654 void setupDrawWithExternalTexture(); 655 void setupDrawNoTexture(); 656 void setupDrawAALine(); 657 void setupDrawAARect(); 658 void setupDrawPoint(float pointSize); 659 void setupDrawColor(int color); 660 void setupDrawColor(int color, int alpha); 661 void setupDrawColor(float r, float g, float b, float a); 662 void setupDrawAlpha8Color(int color, int alpha); 663 void setupDrawTextGamma(const SkPaint* paint); 664 void setupDrawShader(); 665 void setupDrawColorFilter(); 666 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 667 bool swapSrcDst = false); 668 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 669 bool swapSrcDst = false); 670 void setupDrawProgram(); 671 void setupDrawDirtyRegionsDisabled(); 672 void setupDrawModelViewIdentity(bool offset = false); 673 void setupDrawModelView(float left, float top, float right, float bottom, 674 bool ignoreTransform = false, bool ignoreModelView = false); 675 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 676 bool ignoreTransform = false); 677 void setupDrawPointUniforms(); 678 void setupDrawColorUniforms(); 679 void setupDrawPureColorUniforms(); 680 void setupDrawShaderIdentityUniforms(); 681 void setupDrawShaderUniforms(bool ignoreTransform = false); 682 void setupDrawColorFilterUniforms(); 683 void setupDrawSimpleMesh(); 684 void setupDrawTexture(GLuint texture); 685 void setupDrawExternalTexture(GLuint texture); 686 void setupDrawTextureTransform(); 687 void setupDrawTextureTransformUniforms(mat4& transform); 688 void setupDrawTextGammaUniforms(); 689 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 690 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 691 void setupDrawVertices(GLvoid* vertices); 692 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 693 float strokeWidth, int& widthSlot, int& lengthSlot); 694 void finishDrawAALine(const int widthSlot, const int lengthSlot); 695 void finishDrawTexture(); 696 void accountForClear(SkXfermode::Mode mode); 697 698 /** 699 * Renders the specified region as a series of rectangles. This method 700 * is used for debugging only. 701 */ 702 void drawRegionRects(const Region& region); 703 704 /** 705 * Should be invoked every time the glScissor is modified. 706 */ 707 inline void dirtyClip() { 708 mDirtyClip = true; 709 } 710 711 // Dimensions of the drawing surface 712 int mWidth, mHeight; 713 714 // Matrix used for ortho projection in shaders 715 mat4 mOrthoMatrix; 716 717 // Model-view matrix used to position/size objects 718 mat4 mModelView; 719 720 // Number of saved states 721 int mSaveCount; 722 // Base state 723 sp<Snapshot> mFirstSnapshot; 724 // Current state 725 sp<Snapshot> mSnapshot; 726 727 // Shaders 728 SkiaShader* mShader; 729 730 // Color filters 731 SkiaColorFilter* mColorFilter; 732 733 // Used to draw textured quads 734 TextureVertex mMeshVertices[4]; 735 736 // Drop shadow 737 bool mHasShadow; 738 float mShadowRadius; 739 float mShadowDx; 740 float mShadowDy; 741 int mShadowColor; 742 743 // Draw filters 744 bool mHasDrawFilter; 745 int mPaintFilterClearBits; 746 int mPaintFilterSetBits; 747 SkPaint mFilteredPaint; 748 749 // Various caches 750 Caches& mCaches; 751 752 // List of rectangles to clear after saveLayer() is invoked 753 Vector<Rect*> mLayers; 754 // List of functors to invoke after a frame is drawn 755 SortedVector<Functor*> mFunctors; 756 757 // Indentity matrix 758 const mat4 mIdentity; 759 760 // Indicates whether the clip must be restored 761 bool mDirtyClip; 762 763 // The following fields are used to setup drawing 764 // Used to describe the shaders to generate 765 ProgramDescription mDescription; 766 // Color description 767 bool mColorSet; 768 float mColorA, mColorR, mColorG, mColorB; 769 // Indicates that the shader should get a color 770 bool mSetShaderColor; 771 // Current texture unit 772 GLuint mTextureUnit; 773 // Track dirty regions, true by default 774 bool mTrackDirtyRegions; 775 776 friend class DisplayListRenderer; 777 778}; // class OpenGLRenderer 779 780}; // namespace uirenderer 781}; // namespace android 782 783#endif // ANDROID_HWUI_OPENGL_RENDERER_H 784