OpenGLRenderer.h revision 9acd1b4fa897f3a007dd23dc1f0471b151fa03ad
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 * Read externally defined properties to control the behavior 68 * of the renderer. 69 */ 70 ANDROID_API void initProperties(); 71 72 /** 73 * Indicates whether this renderer executes drawing commands immediately. 74 * If this method returns true, the drawing commands will be executed 75 * later. 76 */ 77 virtual bool isDeferred(); 78 79 /** 80 * Sets the dimension of the underlying drawing surface. This method must 81 * be called at least once every time the drawing surface changes size. 82 * 83 * @param width The width in pixels of the underlysing surface 84 * @param height The height in pixels of the underlysing surface 85 */ 86 virtual void setViewport(int width, int height); 87 88 /** 89 * Prepares the renderer to draw a frame. This method must be invoked 90 * at the beginning of each frame. When this method is invoked, the 91 * entire drawing surface is assumed to be redrawn. 92 * 93 * @param opaque If true, the target surface is considered opaque 94 * and will not be cleared. If false, the target surface 95 * will be cleared 96 */ 97 ANDROID_API status_t prepare(bool opaque); 98 99 /** 100 * Prepares the renderer to draw a frame. This method must be invoked 101 * at the beginning of each frame. Only the specified rectangle of the 102 * frame is assumed to be dirty. A clip will automatically be set to 103 * the specified rectangle. 104 * 105 * @param left The left coordinate of the dirty rectangle 106 * @param top The top coordinate of the dirty rectangle 107 * @param right The right coordinate of the dirty rectangle 108 * @param bottom The bottom coordinate of the dirty rectangle 109 * @param opaque If true, the target surface is considered opaque 110 * and will not be cleared. If false, the target surface 111 * will be cleared in the specified dirty rectangle 112 */ 113 virtual status_t prepareDirty(float left, float top, float right, float bottom, bool opaque); 114 115 /** 116 * Indicates the end of a frame. This method must be invoked whenever 117 * the caller is done rendering a frame. 118 */ 119 virtual void finish(); 120 121 /** 122 * This method must be invoked before handing control over to a draw functor. 123 * See callDrawGLFunction() for instance. 124 * 125 * This command must not be recorded inside display lists. 126 */ 127 virtual void interrupt(); 128 129 /** 130 * This method must be invoked after getting control back from a draw functor. 131 * 132 * This command must not be recorded inside display lists. 133 */ 134 virtual void resume(); 135 136 ANDROID_API status_t invokeFunctors(Rect& dirty); 137 ANDROID_API void detachFunctor(Functor* functor); 138 ANDROID_API void attachFunctor(Functor* functor); 139 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty); 140 141 ANDROID_API void pushLayerUpdate(Layer* layer); 142 ANDROID_API void clearLayerUpdates(); 143 144 ANDROID_API int getSaveCount() const; 145 virtual int save(int flags); 146 virtual void restore(); 147 virtual void restoreToCount(int saveCount); 148 149 virtual int saveLayer(float left, float top, float right, float bottom, 150 SkPaint* p, int flags); 151 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 152 int alpha, int flags); 153 154 virtual void translate(float dx, float dy); 155 virtual void rotate(float degrees); 156 virtual void scale(float sx, float sy); 157 virtual void skew(float sx, float sy); 158 159 ANDROID_API void getMatrix(SkMatrix* matrix); 160 virtual void setMatrix(SkMatrix* matrix); 161 virtual void concatMatrix(SkMatrix* matrix); 162 163 ANDROID_API const Rect& getClipBounds(); 164 ANDROID_API bool quickReject(float left, float top, float right, float bottom); 165 bool quickRejectNoScissor(float left, float top, float right, float bottom); 166 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op); 167 virtual Rect* getClipRect(); 168 169 virtual status_t drawDisplayList(DisplayList* displayList, Rect& dirty, int32_t flags, 170 uint32_t level = 0); 171 virtual void outputDisplayList(DisplayList* displayList, uint32_t level = 0); 172 virtual status_t drawLayer(Layer* layer, float x, float y, SkPaint* paint); 173 virtual status_t drawBitmap(SkBitmap* bitmap, float left, float top, SkPaint* paint); 174 virtual status_t drawBitmap(SkBitmap* bitmap, SkMatrix* matrix, SkPaint* paint); 175 virtual status_t drawBitmap(SkBitmap* bitmap, float srcLeft, float srcTop, 176 float srcRight, float srcBottom, float dstLeft, float dstTop, 177 float dstRight, float dstBottom, SkPaint* paint); 178 virtual status_t drawBitmapData(SkBitmap* bitmap, float left, float top, SkPaint* paint); 179 virtual status_t drawBitmapMesh(SkBitmap* bitmap, int meshWidth, int meshHeight, 180 float* vertices, int* colors, SkPaint* paint); 181 virtual status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 182 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 183 float left, float top, float right, float bottom, SkPaint* paint); 184 status_t drawPatch(SkBitmap* bitmap, const int32_t* xDivs, const int32_t* yDivs, 185 const uint32_t* colors, uint32_t width, uint32_t height, int8_t numColors, 186 float left, float top, float right, float bottom, int alpha, SkXfermode::Mode mode); 187 virtual status_t drawColor(int color, SkXfermode::Mode mode); 188 virtual status_t drawRect(float left, float top, float right, float bottom, SkPaint* paint); 189 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 190 float rx, float ry, SkPaint* paint); 191 virtual status_t drawCircle(float x, float y, float radius, SkPaint* paint); 192 virtual status_t drawOval(float left, float top, float right, float bottom, SkPaint* paint); 193 virtual status_t drawArc(float left, float top, float right, float bottom, 194 float startAngle, float sweepAngle, bool useCenter, SkPaint* paint); 195 virtual status_t drawPath(SkPath* path, SkPaint* paint); 196 virtual status_t drawLines(float* points, int count, SkPaint* paint); 197 virtual status_t drawPoints(float* points, int count, SkPaint* paint); 198 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, SkPath* path, 199 float hOffset, float vOffset, SkPaint* paint); 200 virtual status_t drawPosText(const char* text, int bytesCount, int count, 201 const float* positions, SkPaint* paint); 202 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 203 const float* positions, SkPaint* paint, float length = -1.0f); 204 virtual status_t drawRects(const float* rects, int count, SkPaint* paint); 205 206 virtual void resetShader(); 207 virtual void setupShader(SkiaShader* shader); 208 209 virtual void resetColorFilter(); 210 virtual void setupColorFilter(SkiaColorFilter* filter); 211 212 virtual void resetShadow(); 213 virtual void setupShadow(float radius, float dx, float dy, int color); 214 215 virtual void resetPaintFilter(); 216 virtual void setupPaintFilter(int clearBits, int setBits); 217 218 SkPaint* filterPaint(SkPaint* paint); 219 220 ANDROID_API bool isCurrentTransformSimple() { 221 return mSnapshot->transform->isSimple(); 222 } 223 224 /** 225 * Sets the alpha on the current snapshot. This alpha value will be modulated 226 * with other alpha values when drawing primitives. 227 */ 228 void setAlpha(float alpha) { 229 mSnapshot->alpha = alpha; 230 } 231 232 /** 233 * Inserts a named group marker in the stream of GL commands. This marker 234 * can be used by tools to group commands into logical groups. A call to 235 * this method must always be followed later on by a call to endMark(). 236 */ 237 void startMark(const char* name) const; 238 239 /** 240 * Closes the last group marker opened by startMark(). 241 */ 242 void endMark() const; 243 244 /** 245 * Gets the alpha and xfermode out of a paint object. If the paint is null 246 * alpha will be 255 and the xfermode will be SRC_OVER. This method does 247 * not multiply the paint's alpha by the current snapshot's alpha. 248 * 249 * @param paint The paint to extract values from 250 * @param alpha Where to store the resulting alpha 251 * @param mode Where to store the resulting xfermode 252 */ 253 static inline void getAlphaAndModeDirect(SkPaint* paint, int* alpha, SkXfermode::Mode* mode) { 254 if (paint) { 255 *mode = getXfermode(paint->getXfermode()); 256 257 // Skia draws using the color's alpha channel if < 255 258 // Otherwise, it uses the paint's alpha 259 int color = paint->getColor(); 260 *alpha = (color >> 24) & 0xFF; 261 if (*alpha == 255) { 262 *alpha = paint->getAlpha(); 263 } 264 } else { 265 *mode = SkXfermode::kSrcOver_Mode; 266 *alpha = 255; 267 } 268 } 269 270protected: 271 /** 272 * Computes the projection matrix, initialize the first snapshot 273 * and stores the dimensions of the render target. 274 */ 275 void initViewport(int width, int height); 276 277 /** 278 * Clears the underlying surface if needed. 279 */ 280 virtual status_t clear(float left, float top, float right, float bottom, bool opaque); 281 282 /** 283 * Call this method after updating a layer during a drawing pass. 284 */ 285 void resumeAfterLayer(); 286 287 /** 288 * Compose the layer defined in the current snapshot with the layer 289 * defined by the previous snapshot. 290 * 291 * The current snapshot *must* be a layer (flag kFlagIsLayer set.) 292 * 293 * @param curent The current snapshot containing the layer to compose 294 * @param previous The previous snapshot to compose the current layer with 295 */ 296 virtual void composeLayer(sp<Snapshot> current, sp<Snapshot> previous); 297 298 /** 299 * Marks the specified region as dirty at the specified bounds. 300 */ 301 void dirtyLayerUnchecked(Rect& bounds, Region* region); 302 303 /** 304 * Returns the current snapshot. 305 */ 306 sp<Snapshot> getSnapshot() { 307 return mSnapshot; 308 } 309 310 /** 311 * Returns the region of the current layer. 312 */ 313 virtual Region* getRegion() { 314 return mSnapshot->region; 315 } 316 317 /** 318 * Indicates whether rendering is currently targeted at a layer. 319 */ 320 virtual bool hasLayer() { 321 return (mSnapshot->flags & Snapshot::kFlagFboTarget) && mSnapshot->region; 322 } 323 324 /** 325 * Returns the name of the FBO this renderer is rendering into. 326 */ 327 virtual GLint getTargetFbo() { 328 return 0; 329 } 330 331 /** 332 * Renders the specified layer as a textured quad. 333 * 334 * @param layer The layer to render 335 * @param rect The bounds of the layer 336 */ 337 void drawTextureLayer(Layer* layer, const Rect& rect); 338 339 /** 340 * Gets the alpha and xfermode out of a paint object. If the paint is null 341 * alpha will be 255 and the xfermode will be SRC_OVER. 342 * 343 * @param paint The paint to extract values from 344 * @param alpha Where to store the resulting alpha 345 * @param mode Where to store the resulting xfermode 346 */ 347 inline void getAlphaAndMode(SkPaint* paint, int* alpha, SkXfermode::Mode* mode); 348 349 /** 350 * Safely retrieves the mode from the specified xfermode. If the specified 351 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 352 */ 353 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 354 SkXfermode::Mode resultMode; 355 if (!SkXfermode::AsMode(mode, &resultMode)) { 356 resultMode = SkXfermode::kSrcOver_Mode; 357 } 358 return resultMode; 359 } 360 361 /** 362 * Set to true to suppress error checks at the end of a frame. 363 */ 364 virtual bool suppressErrorChecks() { 365 return false; 366 } 367 368 Caches& getCaches() { 369 return mCaches; 370 } 371 372private: 373 /** 374 * Discards the content of the framebuffer if supported by the driver. 375 * This method should be called at the beginning of a frame to optimize 376 * rendering on some tiler architectures. 377 */ 378 void discardFramebuffer(float left, float top, float right, float bottom); 379 380 /** 381 * Ensures the state of the renderer is the same as the state of 382 * the GL context. 383 */ 384 void syncState(); 385 386 /** 387 * Tells the GPU what part of the screen is about to be redrawn. 388 * This method needs to be invoked every time getTargetFbo() is 389 * bound again. 390 */ 391 void startTiling(const sp<Snapshot>& snapshot, bool opaque = false); 392 393 /** 394 * Tells the GPU that we are done drawing the frame or that we 395 * are switching to another render target. 396 */ 397 void endTiling(); 398 399 /** 400 * Saves the current state of the renderer as a new snapshot. 401 * The new snapshot is saved in mSnapshot and the previous snapshot 402 * is linked from mSnapshot->previous. 403 * 404 * @param flags The save flags; see SkCanvas for more information 405 * 406 * @return The new save count. This value can be passed to #restoreToCount() 407 */ 408 int saveSnapshot(int flags); 409 410 /** 411 * Restores the current snapshot; mSnapshot becomes mSnapshot->previous. 412 * 413 * @return True if the clip was modified. 414 */ 415 bool restoreSnapshot(); 416 417 /** 418 * Sets the clipping rectangle using glScissor. The clip is defined by 419 * the current snapshot's clipRect member. 420 */ 421 void setScissorFromClip(); 422 423 /** 424 * Performs a quick reject but does not affect the scissor. Returns 425 * the transformed rect to test and the current clip. 426 */ 427 bool quickRejectNoScissor(float left, float top, float right, float bottom, 428 Rect& transformed, Rect& clip); 429 430 /** 431 * Performs a quick reject but adjust the bounds to account for stroke width if necessary 432 */ 433 bool quickRejectPreStroke(float left, float top, float right, float bottom, SkPaint* paint); 434 435 /** 436 * Creates a new layer stored in the specified snapshot. 437 * 438 * @param snapshot The snapshot associated with the new layer 439 * @param left The left coordinate of the layer 440 * @param top The top coordinate of the layer 441 * @param right The right coordinate of the layer 442 * @param bottom The bottom coordinate of the layer 443 * @param alpha The translucency of the layer 444 * @param mode The blending mode of the layer 445 * @param flags The layer save flags 446 * @param previousFbo The name of the current framebuffer 447 * 448 * @return True if the layer was successfully created, false otherwise 449 */ 450 bool createLayer(float left, float top, float right, float bottom, 451 int alpha, SkXfermode::Mode mode, int flags, GLuint previousFbo); 452 453 /** 454 * Creates a new layer stored in the specified snapshot as an FBO. 455 * 456 * @param layer The layer to store as an FBO 457 * @param snapshot The snapshot associated with the new layer 458 * @param bounds The bounds of the layer 459 * @param previousFbo The name of the current framebuffer 460 */ 461 bool createFboLayer(Layer* layer, Rect& bounds, Rect& clip, GLuint previousFbo); 462 463 /** 464 * Compose the specified layer as a region. 465 * 466 * @param layer The layer to compose 467 * @param rect The layer's bounds 468 */ 469 void composeLayerRegion(Layer* layer, const Rect& rect); 470 471 /** 472 * Compose the specified layer as a simple rectangle. 473 * 474 * @param layer The layer to compose 475 * @param rect The layer's bounds 476 * @param swap If true, the source and destination are swapped 477 */ 478 void composeLayerRect(Layer* layer, const Rect& rect, bool swap = false); 479 480 /** 481 * Clears all the regions corresponding to the current list of layers. 482 * This method MUST be invoked before any drawing operation. 483 */ 484 void clearLayerRegions(); 485 486 /** 487 * Mark the layer as dirty at the specified coordinates. The coordinates 488 * are transformed with the supplied matrix. 489 */ 490 void dirtyLayer(const float left, const float top, 491 const float right, const float bottom, const mat4 transform); 492 493 /** 494 * Mark the layer as dirty at the specified coordinates. 495 */ 496 void dirtyLayer(const float left, const float top, 497 const float right, const float bottom); 498 499 /** 500 * Draws a colored rectangle with the specified color. 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 color The rectangle's ARGB color, defined as a packed 32 bits word 508 * @param mode The Skia xfermode to use 509 * @param ignoreTransform True if the current transform should be ignored 510 */ 511 void drawColorRect(float left, float top, float right, float bottom, 512 int color, SkXfermode::Mode mode, bool ignoreTransform = false); 513 514 /** 515 * Draws the shape represented by the specified path texture. 516 * This method invokes drawPathTexture() but takes into account 517 * the extra left/top offset and the texture offset to correctly 518 * position the final shape. 519 * 520 * @param left The left coordinate of the shape to render 521 * @param top The top coordinate of the shape to render 522 * @param texture The texture reprsenting the shape 523 * @param paint The paint to draw the shape with 524 */ 525 status_t drawShape(float left, float top, const PathTexture* texture, SkPaint* paint); 526 527 /** 528 * Draws the specified texture as an alpha bitmap. Alpha bitmaps obey 529 * different compositing rules. 530 * 531 * @param texture The texture to draw with 532 * @param left The x coordinate of the bitmap 533 * @param top The y coordinate of the bitmap 534 * @param paint The paint to render with 535 */ 536 void drawAlphaBitmap(Texture* texture, float left, float top, SkPaint* paint); 537 538 /** 539 * Renders the convex hull defined by the specified path as a strip of polygons. 540 * 541 * @param path The hull of the path to draw 542 * @param paint The paint to render with 543 */ 544 void drawConvexPath(const SkPath& path, SkPaint* paint); 545 546 /** 547 * Draws a textured rectangle with the specified texture. The specified coordinates 548 * are transformed by the current snapshot's transform matrix. 549 * 550 * @param left The left coordinate of the rectangle 551 * @param top The top coordinate of the rectangle 552 * @param right The right coordinate of the rectangle 553 * @param bottom The bottom coordinate of the rectangle 554 * @param texture The texture name to map onto the rectangle 555 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 556 * @param mode The blending mode 557 * @param blend True if the texture contains an alpha channel 558 */ 559 void drawTextureRect(float left, float top, float right, float bottom, GLuint texture, 560 float alpha, SkXfermode::Mode mode, bool blend); 561 562 /** 563 * Draws a textured rectangle with the specified texture. The specified coordinates 564 * are transformed by the current snapshot's transform matrix. 565 * 566 * @param left The left coordinate of the rectangle 567 * @param top The top coordinate of the rectangle 568 * @param right The right coordinate of the rectangle 569 * @param bottom The bottom coordinate of the rectangle 570 * @param texture The texture to use 571 * @param paint The paint containing the alpha, blending mode, etc. 572 */ 573 void drawTextureRect(float left, float top, float right, float bottom, 574 Texture* texture, SkPaint* paint); 575 576 /** 577 * Draws a textured mesh with the specified texture. If the indices are omitted, 578 * the mesh is drawn as a simple quad. The mesh pointers become offsets when a 579 * VBO is bound. 580 * 581 * @param left The left coordinate of the rectangle 582 * @param top The top coordinate of the rectangle 583 * @param right The right coordinate of the rectangle 584 * @param bottom The bottom coordinate of the rectangle 585 * @param texture The texture name to map onto the rectangle 586 * @param alpha An additional translucency parameter, between 0.0f and 1.0f 587 * @param mode The blending mode 588 * @param blend True if the texture contains an alpha channel 589 * @param vertices The vertices that define the mesh 590 * @param texCoords The texture coordinates of each vertex 591 * @param elementsCount The number of elements in the mesh, required by indices 592 * @param swapSrcDst Whether or not the src and dst blending operations should be swapped 593 * @param ignoreTransform True if the current transform should be ignored 594 * @param vbo The VBO used to draw the mesh 595 * @param ignoreScale True if the model view matrix should not be scaled 596 * @param dirty True if calling this method should dirty the current layer 597 */ 598 void drawTextureMesh(float left, float top, float right, float bottom, GLuint texture, 599 float alpha, SkXfermode::Mode mode, bool blend, 600 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 601 bool swapSrcDst = false, bool ignoreTransform = false, GLuint vbo = 0, 602 bool ignoreScale = false, bool dirty = true); 603 604 void drawAlpha8TextureMesh(float left, float top, float right, float bottom, 605 GLuint texture, bool hasColor, int color, int alpha, SkXfermode::Mode mode, 606 GLvoid* vertices, GLvoid* texCoords, GLenum drawMode, GLsizei elementsCount, 607 bool ignoreTransform, bool dirty = true); 608 609 /** 610 * Draws text underline and strike-through if needed. 611 * 612 * @param text The text to decor 613 * @param bytesCount The number of bytes in the text 614 * @param length The length in pixels of the text, can be <= 0.0f to force a measurement 615 * @param x The x coordinate where the text will be drawn 616 * @param y The y coordinate where the text will be drawn 617 * @param paint The paint to draw the text with 618 */ 619 void drawTextDecorations(const char* text, int bytesCount, float length, 620 float x, float y, SkPaint* paint); 621 622 /** 623 * Draws shadow layer on text (with optional positions). 624 * 625 * @param paint The paint to draw the shadow with 626 * @param text The text to draw 627 * @param bytesCount The number of bytes in the text 628 * @param count The number of glyphs in the text 629 * @param positions The x, y positions of individual glyphs (or NULL) 630 * @param fontRenderer The font renderer object 631 * @param alpha The alpha value for drawing the shadow 632 * @param mode The xfermode for drawing the shadow 633 * @param x The x coordinate where the shadow will be drawn 634 * @param y The y coordinate where the shadow will be drawn 635 */ 636 void drawTextShadow(SkPaint* paint, const char* text, int bytesCount, int count, 637 const float* positions, FontRenderer& fontRenderer, int alpha, SkXfermode::Mode mode, 638 float x, float y); 639 640 /** 641 * Draws a path texture. Path textures are alpha8 bitmaps that need special 642 * compositing to apply colors/filters/etc. 643 * 644 * @param texture The texture to render 645 * @param x The x coordinate where the texture will be drawn 646 * @param y The y coordinate where the texture will be drawn 647 * @param paint The paint to draw the texture with 648 */ 649 void drawPathTexture(const PathTexture* texture, float x, float y, SkPaint* paint); 650 651 /** 652 * Resets the texture coordinates stored in mMeshVertices. Setting the values 653 * back to default is achieved by calling: 654 * 655 * resetDrawTextureTexCoords(0.0f, 0.0f, 1.0f, 1.0f); 656 * 657 * @param u1 The left coordinate of the texture 658 * @param v1 The bottom coordinate of the texture 659 * @param u2 The right coordinate of the texture 660 * @param v2 The top coordinate of the texture 661 */ 662 void resetDrawTextureTexCoords(float u1, float v1, float u2, float v2); 663 664 /** 665 * Binds the specified texture. The texture unit must have been selected 666 * prior to calling this method. 667 */ 668 inline void bindTexture(GLuint texture) { 669 glBindTexture(GL_TEXTURE_2D, texture); 670 } 671 672 /** 673 * Binds the specified EGLImage texture. The texture unit must have been selected 674 * prior to calling this method. 675 */ 676 inline void bindExternalTexture(GLuint texture) { 677 glBindTexture(GL_TEXTURE_EXTERNAL_OES, texture); 678 } 679 680 /** 681 * Enable or disable blending as necessary. This function sets the appropriate 682 * blend function based on the specified xfermode. 683 */ 684 inline void chooseBlending(bool blend, SkXfermode::Mode mode, ProgramDescription& description, 685 bool swapSrcDst = false); 686 687 /** 688 * Use the specified program with the current GL context. If the program is already 689 * in use, it will not be bound again. If it is not in use, the current program is 690 * marked unused and the specified program becomes used and becomes the new 691 * current program. 692 * 693 * @param program The program to use 694 * 695 * @return true If the specified program was already in use, false otherwise. 696 */ 697 inline bool useProgram(Program* program); 698 699 /** 700 * Invoked before any drawing operation. This sets required state. 701 */ 702 void setupDraw(bool clear = true); 703 704 /** 705 * Various methods to setup OpenGL rendering. 706 */ 707 void setupDrawWithTexture(bool isAlpha8 = false); 708 void setupDrawWithExternalTexture(); 709 void setupDrawNoTexture(); 710 void setupDrawAA(); 711 void setupDrawVertexShape(); 712 void setupDrawPoint(float pointSize); 713 void setupDrawColor(int color, int alpha); 714 void setupDrawColor(float r, float g, float b, float a); 715 void setupDrawAlpha8Color(int color, int alpha); 716 void setupDrawTextGamma(const SkPaint* paint); 717 void setupDrawShader(); 718 void setupDrawColorFilter(); 719 void setupDrawBlending(SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 720 bool swapSrcDst = false); 721 void setupDrawBlending(bool blend = true, SkXfermode::Mode mode = SkXfermode::kSrcOver_Mode, 722 bool swapSrcDst = false); 723 void setupDrawProgram(); 724 void setupDrawDirtyRegionsDisabled(); 725 void setupDrawModelViewIdentity(bool offset = false); 726 void setupDrawModelView(float left, float top, float right, float bottom, 727 bool ignoreTransform = false, bool ignoreModelView = false); 728 void setupDrawModelViewTranslate(float left, float top, float right, float bottom, 729 bool ignoreTransform = false); 730 void setupDrawPointUniforms(); 731 void setupDrawColorUniforms(); 732 void setupDrawPureColorUniforms(); 733 void setupDrawShaderIdentityUniforms(); 734 void setupDrawShaderUniforms(bool ignoreTransform = false); 735 void setupDrawColorFilterUniforms(); 736 void setupDrawSimpleMesh(); 737 void setupDrawTexture(GLuint texture); 738 void setupDrawExternalTexture(GLuint texture); 739 void setupDrawTextureTransform(); 740 void setupDrawTextureTransformUniforms(mat4& transform); 741 void setupDrawTextGammaUniforms(); 742 void setupDrawMesh(GLvoid* vertices, GLvoid* texCoords = NULL, GLuint vbo = 0); 743 void setupDrawMeshIndices(GLvoid* vertices, GLvoid* texCoords); 744 void setupDrawVertices(GLvoid* vertices); 745 void setupDrawAALine(GLvoid* vertices, GLvoid* distanceCoords, GLvoid* lengthCoords, 746 float strokeWidth, int& widthSlot, int& lengthSlot); 747 void finishDrawAALine(const int widthSlot, const int lengthSlot); 748 void finishDrawTexture(); 749 void accountForClear(SkXfermode::Mode mode); 750 751 bool updateLayer(Layer* layer, bool inFrame); 752 void updateLayers(); 753 754 /** 755 * Renders the specified region as a series of rectangles. This method 756 * is used for debugging only. 757 */ 758 void drawRegionRects(const Region& region); 759 760 void debugOverdraw(bool enable, bool clear); 761 void renderOverdraw(); 762 763 /** 764 * Should be invoked every time the glScissor is modified. 765 */ 766 inline void dirtyClip() { 767 mDirtyClip = true; 768 } 769 770 // Dimensions of the drawing surface 771 int mWidth, mHeight; 772 773 // Matrix used for ortho projection in shaders 774 mat4 mOrthoMatrix; 775 776 // Model-view matrix used to position/size objects 777 mat4 mModelView; 778 779 // Number of saved states 780 int mSaveCount; 781 // Base state 782 sp<Snapshot> mFirstSnapshot; 783 // Current state 784 sp<Snapshot> mSnapshot; 785 // State used to define the clipping region 786 sp<Snapshot> mTilingSnapshot; 787 788 // Shaders 789 SkiaShader* mShader; 790 791 // Color filters 792 SkiaColorFilter* mColorFilter; 793 794 // Used to draw textured quads 795 TextureVertex mMeshVertices[4]; 796 797 // Drop shadow 798 bool mHasShadow; 799 float mShadowRadius; 800 float mShadowDx; 801 float mShadowDy; 802 int mShadowColor; 803 804 // Draw filters 805 bool mHasDrawFilter; 806 int mPaintFilterClearBits; 807 int mPaintFilterSetBits; 808 SkPaint mFilteredPaint; 809 810 // Various caches 811 Caches& mCaches; 812 813 // List of rectangles to clear after saveLayer() is invoked 814 Vector<Rect*> mLayers; 815 // List of functors to invoke after a frame is drawn 816 SortedVector<Functor*> mFunctors; 817 // List of layers to update at the beginning of a frame 818 Vector<Layer*> mLayerUpdates; 819 820 // Indentity matrix 821 const mat4 mIdentity; 822 823 // Indicates whether the clip must be restored 824 bool mDirtyClip; 825 826 // The following fields are used to setup drawing 827 // Used to describe the shaders to generate 828 ProgramDescription mDescription; 829 // Color description 830 bool mColorSet; 831 float mColorA, mColorR, mColorG, mColorB; 832 // Indicates that the shader should get a color 833 bool mSetShaderColor; 834 // Current texture unit 835 GLuint mTextureUnit; 836 // Track dirty regions, true by default 837 bool mTrackDirtyRegions; 838 // Indicate whether we are drawing an opaque frame 839 bool mOpaqueFrame; 840 841 // See PROPERTY_DISABLE_SCISSOR_OPTIMIZATION in 842 // Properties.h 843 bool mScissorOptimizationDisabled; 844 845 // No-ops start/endTiling when set 846 bool mSuppressTiling; 847 848 friend class DisplayListRenderer; 849 850}; // class OpenGLRenderer 851 852}; // namespace uirenderer 853}; // namespace android 854 855#endif // ANDROID_HWUI_OPENGL_RENDERER_H 856