OpenGLRenderer.h revision c89b14bba0f6cc2c91629080617f7ed215f697f3
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(sp<Snapshot> snapshot, 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, sp<Snapshot> snapshot, 395 GLuint previousFbo); 396 397 /** 398 * Compose the specified layer as a region. 399 * 400 * @param layer The layer to compose 401 * @param rect The layer's bounds 402 */ 403 void composeLayerRegion(Layer* layer, const Rect& rect); 404 405 /** 406 * Compose the specified layer as a simple rectangle. 407 * 408 * @param layer The layer to compose 409 * @param rect The layer's bounds 410 * @param swap If true, the source and destination are swapped 411 */ 412 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 413 414 /** 415 * Clears all the regions corresponding to the current list of layers. 416 * This method MUST be invoked before any drawing operation. 417 */ 418 void clearLayerRegions(); 419 420 /** 421 * Mark the layer as dirty at the specified coordinates. The coordinates 422 * are transformed with the supplied matrix. 423 */ 424 void dirtyLayer(const float left, const float top, 425 const float right, const float bottom, const mat4 transform); 426 427 /** 428 * Mark the layer as dirty at the specified coordinates. 429 */ 430 void dirtyLayer(const float left, const float top, 431 const float right, const float bottom); 432 433 /** 434 * Draws a colored rectangle with the specified color. The specified coordinates 435 * are transformed by the current snapshot's transform matrix. 436 * 437 * @param left The left coordinate of the rectangle 438 * @param top The top coordinate of the rectangle 439 * @param right The right coordinate of the rectangle 440 * @param bottom The bottom coordinate of the rectangle 441 * @param color The rectangle's ARGB color, defined as a packed 32 bits word 442 * @param mode The Skia xfermode to use 443 * @param ignoreTransform True if the current transform should be ignored 444 * @param ignoreBlending True if the blending is set by the caller 445 */ 446 void drawColorRect(float left, float top, float right, float bottom, 447 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 448 449 /** 450 * Draws the shape represented by the specified path texture. 451 * This method invokes drawPathTexture() but takes into account 452 * the extra left/top offset and the texture offset to correctly 453 * position the final shape. 454 * 455 * @param left The left coordinate of the shape to render 456 * @param top The top coordinate of the shape to render 457 * @param texture The texture reprsenting the shape 458 * @param paint The paint to draw the shape with 459 */ 460 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 461 462 /** 463 * Renders the rect defined by the specified bounds as a shape. 464 * This will render the rect using a path texture, which is used to render 465 * rects with stroke effects. 466 * 467 * @param left The left coordinate of the rect to draw 468 * @param top The top coordinate of the rect to draw 469 * @param right The right coordinate of the rect to draw 470 * @param bottom The bottom coordinate of the rect to draw 471 * @param p The paint to draw the rect with 472 */ 473 status_t drawRectAsShape(float left, float top, float right, float bottom, SkPaint* p); 474 475 /** 476 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 477 * different compositing rules. 478 * 479 * @param texture The texture to draw with 480 * @param left The x coordinate of the bitmap 481 * @param top The y coordinate of the bitmap 482 * @param paint The paint to render with 483 */ 484 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 485 486 /** 487 * Renders the rect defined by the specified bounds as an anti-aliased rect. 488 * 489 * @param left The left coordinate of the rect to draw 490 * @param top The top coordinate of the rect to draw 491 * @param right The right coordinate of the rect to draw 492 * @param bottom The bottom coordinate of the rect to draw 493 * @param color The color of the rect 494 * @param mode The blending mode to draw the rect 495 */ 496 void drawAARect(float left, float top, float right, float bottom, 497 int color, SkXfermode::Mode mode); 498 499 /** 500 * Draws a textured rectangle with the specified texture. The specified coordinates 501 * are transformed by the current snapshot's transform matrix. 502 * 503 * @param left The left coordinate of the rectangle 504 * @param top The top coordinate of the rectangle 505 * @param right The right coordinate of the rectangle 506 * @param bottom The bottom coordinate of the rectangle 507 * @param texture The texture name to map onto the rectangle 508 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 509 * @param mode The blending mode 510 * @param blend True if the texture contains an alpha channel 511 */ 512 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 513 float alpha, SkXfermode::Mode mode, bool blend); 514 515 /** 516 * Draws a textured rectangle with the specified texture. The specified coordinates 517 * are transformed by the current snapshot's transform matrix. 518 * 519 * @param left The left coordinate of the rectangle 520 * @param top The top coordinate of the rectangle 521 * @param right The right coordinate of the rectangle 522 * @param bottom The bottom coordinate of the rectangle 523 * @param texture The texture to use 524 * @param paint The paint containing the alpha, blending mode, etc. 525 */ 526 void drawTextureRect(float left, float top, float right, float bottom, 527 Texture* texture, SkPaint* paint); 528 529 /** 530 * Draws a textured mesh with the specified texture. If the indices are omitted, 531 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 532 * VBO is bound. 533 * 534 * @param left The left coordinate of the rectangle 535 * @param top The top coordinate of the rectangle 536 * @param right The right coordinate of the rectangle 537 * @param bottom The bottom coordinate of the rectangle 538 * @param texture The texture name to map onto the rectangle 539 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 540 * @param mode The blending mode 541 * @param blend True if the texture contains an alpha channel 542 * @param vertices The vertices that define the mesh 543 * @param texCoords The texture coordinates of each vertex 544 * @param elementsCount The number of elements in the mesh, required by indices 545 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 546 * @param ignoreTransform True if the current transform should be ignored 547 * @param vbo The VBO used to draw the mesh 548 * @param ignoreScale True if the model view matrix should not be scaled 549 * @param dirty True if calling this method should dirty the current layer 550 */ 551 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 552 float alpha, SkXfermode::Mode mode, bool blend, 553 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 554 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 555 bool ignoreScale = false, bool dirty = true); 556 557 /** 558 * Draws text underline and strike-through if needed. 559 * 560 * @param text The text to decor 561 * @param bytesCount The number of bytes in the text 562 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 563 * @param x The x coordinate where the text will be drawn 564 * @param y The y coordinate where the text will be drawn 565 * @param paint The paint to draw the text with 566 */ 567 void drawTextDecorations(const char* text, int bytesCount, float length, 568 float x, float y, SkPaint* paint); 569 570 /** 571 * Draws shadow layer on text (with optional positions). 572 * 573 * @param paint The paint to draw the shadow with 574 * @param text The text to draw 575 * @param bytesCount The number of bytes in the text 576 * @param count The number of glyphs in the text 577 * @param positions The x, y positions of individual glyphs (or NULL) 578 * @param fontRenderer The font renderer object 579 * @param alpha The alpha value for drawing the shadow 580 * @param mode The xfermode for drawing the shadow 581 * @param x The x coordinate where the shadow will be drawn 582 * @param y The y coordinate where the shadow will be drawn 583 */ 584 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 585 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 586 float x, float y); 587 588 /** 589 * Draws a path texture. Path textures are alpha8 bitmaps that need special 590 * compositing to apply colors/filters/etc. 591 * 592 * @param texture The texture to render 593 * @param x The x coordinate where the texture will be drawn 594 * @param y The y coordinate where the texture will be drawn 595 * @param paint The paint to draw the texture with 596 */ 597 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 598 599 /** 600 * Resets the texture coordinates stored in mMeshVertices. Setting the values 601 * back to default is achieved by calling: 602 * 603 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 604 * 605 * @param u1 The left coordinate of the texture 606 * @param v1 The bottom coordinate of the texture 607 * @param u2 The right coordinate of the texture 608 * @param v2 The top coordinate of the texture 609 */ 610 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 611 612 /** 613 * Binds the specified texture. The texture unit must have been selected 614 * prior to calling this method. 615 */ 616 inline void bindTexture(GLuint texture) { 617 glBindTexture(GL_TEXTURE_2D, texture); 618 } 619 620 /** 621 * Binds the specified EGLImage texture. The texture unit must have been selected 622 * prior to calling this method. 623 */ 624 inline void bindExternalTexture(GLuint texture) { 625 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 626 } 627 628 /** 629 * Enable or disable blending as necessary. This function sets the appropriate 630 * blend function based on the specified xfermode. 631 */ 632 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 633 bool swapSrcDst = false); 634 635 /** 636 * Use the specified program with the current GL context. If the program is already 637 * in use, it will not be bound again. If it is not in use, the current program is 638 * marked unused and the specified program becomes used and becomes the new 639 * current program. 640 * 641 * @param program The program to use 642 * 643 * @return true If the specified program was already in use, false otherwise. 644 */ 645 inline bool useProgram(Program* program); 646 647 /** 648 * Invoked before any drawing operation. This sets required state. 649 */ 650 void setupDraw(bool clear = true); 651 652 /** 653 * Various methods to setup OpenGL rendering. 654 */ 655 void setupDrawWithTexture(bool isAlpha8 = false); 656 void setupDrawWithExternalTexture(); 657 void setupDrawNoTexture(); 658 void setupDrawAALine(); 659 void setupDrawPoint(float pointSize); 660 void setupDrawColor(int color); 661 void setupDrawColor(int color, int alpha); 662 void setupDrawColor(float r, float g, float b, float a); 663 void setupDrawAlpha8Color(int color, int alpha); 664 void setupDrawTextGamma(const SkPaint* paint); 665 void setupDrawShader(); 666 void setupDrawColorFilter(); 667 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 668 bool swapSrcDst = false); 669 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 670 bool swapSrcDst = false); 671 void setupDrawProgram(); 672 void setupDrawDirtyRegionsDisabled(); 673 void setupDrawModelViewIdentity(bool offset = false); 674 void setupDrawModelView(float left, float top, float right, float bottom, 675 bool ignoreTransform = false, bool ignoreModelView = false); 676 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 677 bool ignoreTransform = false); 678 void setupDrawPointUniforms(); 679 void setupDrawColorUniforms(); 680 void setupDrawPureColorUniforms(); 681 void setupDrawShaderIdentityUniforms(); 682 void setupDrawShaderUniforms(bool ignoreTransform = false); 683 void setupDrawColorFilterUniforms(); 684 void setupDrawSimpleMesh(); 685 void setupDrawTexture(GLuint texture); 686 void setupDrawExternalTexture(GLuint texture); 687 void setupDrawTextureTransform(); 688 void setupDrawTextureTransformUniforms(mat4& transform); 689 void setupDrawTextGammaUniforms(); 690 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 691 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 692 void setupDrawVertices(GLvoid* vertices); 693 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 694 float strokeWidth, int& widthSlot, int& lengthSlot); 695 void finishDrawAALine(const int widthSlot, const int lengthSlot); 696 void finishDrawTexture(); 697 void accountForClear(SkXfermode::Mode mode); 698 699 /** 700 * Renders the specified region as a series of rectangles. This method 701 * is used for debugging only. 702 */ 703 void drawRegionRects(const Region& region); 704 705 /** 706 * Should be invoked every time the glScissor is modified. 707 */ 708 inline void dirtyClip() { 709 mDirtyClip = true; 710 } 711 712 // Dimensions of the drawing surface 713 int mWidth, mHeight; 714 715 // Matrix used for ortho projection in shaders 716 mat4 mOrthoMatrix; 717 718 // Model-view matrix used to position/size objects 719 mat4 mModelView; 720 721 // Number of saved states 722 int mSaveCount; 723 // Base state 724 sp<Snapshot> mFirstSnapshot; 725 // Current state 726 sp<Snapshot> mSnapshot; 727 728 // Shaders 729 SkiaShader* mShader; 730 731 // Color filters 732 SkiaColorFilter* mColorFilter; 733 734 // Used to draw textured quads 735 TextureVertex mMeshVertices[4]; 736 737 // Drop shadow 738 bool mHasShadow; 739 float mShadowRadius; 740 float mShadowDx; 741 float mShadowDy; 742 int mShadowColor; 743 744 // Draw filters 745 bool mHasDrawFilter; 746 int mPaintFilterClearBits; 747 int mPaintFilterSetBits; 748 SkPaint mFilteredPaint; 749 750 // Various caches 751 Caches& mCaches; 752 753 // List of rectangles to clear after saveLayer() is invoked 754 Vector<Rect*> mLayers; 755 // List of functors to invoke after a frame is drawn 756 SortedVector<Functor*> mFunctors; 757 758 // Indentity matrix 759 const mat4 mIdentity; 760 761 // Indicates whether the clip must be restored 762 bool mDirtyClip; 763 764 // The following fields are used to setup drawing 765 // Used to describe the shaders to generate 766 ProgramDescription mDescription; 767 // Color description 768 bool mColorSet; 769 float mColorA, mColorR, mColorG, mColorB; 770 // Indicates that the shader should get a color 771 bool mSetShaderColor; 772 // Current texture unit 773 GLuint mTextureUnit; 774 // Track dirty regions, true by default 775 bool mTrackDirtyRegions; 776 777 friend class DisplayListRenderer; 778 779}; // class OpenGLRenderer 780 781}; // namespace uirenderer 782}; // namespace android 783 784#endif // ANDROID_HWUI_OPENGL_RENDERER_H 785