src/third_party/skia/src/gpu/gl/debug/GrGLCreateDebugInterface.cpp

   1
   2 /*
   3  * Copyright 2012 Google Inc.
   4  *
   5  * Use of this source code is governed by a BSD-style license that can be
   6  * found in the LICENSE file.
   7  */
   8
   9
  10 #include "gl/GrGLInterface.h"
  11 #include "GrDebugGL.h"
  12 #include "GrShaderObj.h"
  13 #include "GrProgramObj.h"
  14 #include "GrBufferObj.h"
  15 #include "GrTextureUnitObj.h"
  16 #include "GrTextureObj.h"
  17 #include "GrFrameBufferObj.h"
  18 #include "GrRenderBufferObj.h"
  19 #include "GrVertexArrayObj.h"
  20 #include "SkFloatingPoint.h"
  21 #include "../GrGLNoOpInterface.h"
  22
  23 namespace { // suppress no previous prototype warning
  24
  25 ////////////////////////////////////////////////////////////////////////////////
  26 GrGLvoid GR_GL_FUNCTION_TYPE debugGLActiveTexture(GrGLenum texture) {
  27
  28     // Ganesh offsets the texture unit indices
  29     texture -= GR_GL_TEXTURE0;
  30     GrAlwaysAssert(texture < GrDebugGL::getInstance()->getMaxTextureUnits());
  31
  32     GrDebugGL::getInstance()->setCurTextureUnit(texture);
  33 }
  34
  35 ////////////////////////////////////////////////////////////////////////////////
  36 GrGLvoid GR_GL_FUNCTION_TYPE debugGLAttachShader(GrGLuint programID,
  37                                                  GrGLuint shaderID) {
  38
  39     GrProgramObj *program = GR_FIND(programID, GrProgramObj,
  40                                     GrDebugGL::kProgram_ObjTypes);
  41     GrAlwaysAssert(program);
  42
  43     GrShaderObj *shader = GR_FIND(shaderID,
  44                                   GrShaderObj,
  45                                   GrDebugGL::kShader_ObjTypes);
  46     GrAlwaysAssert(shader);
  47
  48     program->AttachShader(shader);
  49 }
  50
  51 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBeginQuery(GrGLenum target, GrGLuint id) {
  52 }
  53
  54 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindAttribLocation(GrGLuint program,
  55                                                        GrGLuint index,
  56                                                        const char* name) {
  57 }
  58
  59 ////////////////////////////////////////////////////////////////////////////////
  60 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindTexture(GrGLenum target,
  61                                                 GrGLuint textureID) {
  62
  63     // we don't use cube maps
  64     GrAlwaysAssert(target == GR_GL_TEXTURE_2D);
  65                                     // || target == GR_GL_TEXTURE_CUBE_MAP);
  66
  67     // a textureID of 0 is acceptable - it binds to the default texture target
  68     GrTextureObj *texture = GR_FIND(textureID, GrTextureObj,
  69                                     GrDebugGL::kTexture_ObjTypes);
  70
  71     GrDebugGL::getInstance()->setTexture(texture);
  72 }
  73
  74
  75 ////////////////////////////////////////////////////////////////////////////////
  76 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBufferData(GrGLenum target,
  77                                                GrGLsizeiptr size,
  78                                                const GrGLvoid* data,
  79                                                GrGLenum usage) {
  80     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target ||
  81                    GR_GL_ELEMENT_ARRAY_BUFFER == target);
  82     GrAlwaysAssert(size >= 0);
  83     GrAlwaysAssert(GR_GL_STREAM_DRAW == usage ||
  84                    GR_GL_STATIC_DRAW == usage ||
  85                    GR_GL_DYNAMIC_DRAW == usage);
  86
  87     GrBufferObj *buffer = NULL;
  88     switch (target) {
  89         case GR_GL_ARRAY_BUFFER:
  90             buffer = GrDebugGL::getInstance()->getArrayBuffer();
  91             break;
  92         case GR_GL_ELEMENT_ARRAY_BUFFER:
  93             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
  94             break;
  95         default:
  96             SkFAIL("Unexpected target to glBufferData");
  97             break;
  98     }
  99
 100     GrAlwaysAssert(buffer);
 101     GrAlwaysAssert(buffer->getBound());
 102
 103     buffer->allocate(size, reinterpret_cast<const GrGLchar *>(data));
 104     buffer->setUsage(usage);
 105 }
 106
 107
 108 GrGLvoid GR_GL_FUNCTION_TYPE debugGLPixelStorei(GrGLenum pname,
 109                                                 GrGLint param) {
 110
 111     switch (pname) {
 112         case GR_GL_UNPACK_ROW_LENGTH:
 113             GrDebugGL::getInstance()->setUnPackRowLength(param);
 114             break;
 115         case GR_GL_PACK_ROW_LENGTH:
 116             GrDebugGL::getInstance()->setPackRowLength(param);
 117             break;
 118         case GR_GL_UNPACK_ALIGNMENT:
 119             break;
 120         case GR_GL_PACK_ALIGNMENT:
 121             GrAlwaysAssert(false);
 122             break;
 123         default:
 124             GrAlwaysAssert(false);
 125             break;
 126     }
 127 }
 128
 129 GrGLvoid GR_GL_FUNCTION_TYPE debugGLReadPixels(GrGLint x,
 130                                                GrGLint y,
 131                                                GrGLsizei width,
 132                                                GrGLsizei height,
 133                                                GrGLenum format,
 134                                                GrGLenum type,
 135                                                GrGLvoid* pixels) {
 136
 137     GrGLint pixelsInRow = width;
 138     if (0 < GrDebugGL::getInstance()->getPackRowLength()) {
 139         pixelsInRow = GrDebugGL::getInstance()->getPackRowLength();
 140     }
 141
 142     GrGLint componentsPerPixel = 0;
 143
 144     switch (format) {
 145         case GR_GL_RGBA:
 146             // fallthrough
 147         case GR_GL_BGRA:
 148             componentsPerPixel = 4;
 149             break;
 150         case GR_GL_RGB:
 151             componentsPerPixel = 3;
 152             break;
 153         case GR_GL_RED:
 154             componentsPerPixel = 1;
 155             break;
 156         default:
 157             GrAlwaysAssert(false);
 158             break;
 159     }
 160
 161     GrGLint alignment = 4;  // the pack alignment (one of 1, 2, 4 or 8)
 162     // Ganesh currently doesn't support setting GR_GL_PACK_ALIGNMENT
 163
 164     GrGLint componentSize = 0;  // size (in bytes) of a single component
 165
 166     switch (type) {
 167         case GR_GL_UNSIGNED_BYTE:
 168             componentSize = 1;
 169             break;
 170         default:
 171             GrAlwaysAssert(false);
 172             break;
 173     }
 174
 175     GrGLint rowStride = 0;  // number of components (not bytes) to skip
 176     if (componentSize >= alignment) {
 177         rowStride = componentsPerPixel * pixelsInRow;
 178     } else {
 179         float fTemp =
 180             sk_float_ceil(componentSize * componentsPerPixel * pixelsInRow /
 181                           static_cast<float>(alignment));
 182         rowStride = static_cast<GrGLint>(alignment * fTemp / componentSize);
 183     }
 184
 185     GrGLchar *scanline = static_cast<GrGLchar *>(pixels);
 186     for (int y = 0; y < height; ++y) {
 187         memset(scanline, 0, componentsPerPixel * componentSize * width);
 188         scanline += rowStride;
 189     }
 190 }
 191
 192  GrGLvoid GR_GL_FUNCTION_TYPE debugGLUseProgram(GrGLuint programID) {
 193
 194      // A programID of 0 is legal
 195      GrProgramObj *program = GR_FIND(programID,
 196                                      GrProgramObj,
 197                                      GrDebugGL::kProgram_ObjTypes);
 198
 199      GrDebugGL::getInstance()->useProgram(program);
 200  }
 201
 202  GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindFramebuffer(GrGLenum target,
 203                                                      GrGLuint frameBufferID) {
 204
 205      GrAlwaysAssert(GR_GL_FRAMEBUFFER == target ||
 206                     GR_GL_READ_FRAMEBUFFER == target ||
 207                     GR_GL_DRAW_FRAMEBUFFER);
 208
 209      // a frameBufferID of 0 is acceptable - it binds to the default
 210      // frame buffer
 211      GrFrameBufferObj *frameBuffer = GR_FIND(frameBufferID,
 212                                              GrFrameBufferObj,
 213                                              GrDebugGL::kFrameBuffer_ObjTypes);
 214
 215      GrDebugGL::getInstance()->setFrameBuffer(frameBuffer);
 216  }
 217
 218  GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindRenderbuffer(GrGLenum target, GrGLuint renderBufferID) {
 219
 220      GrAlwaysAssert(GR_GL_RENDERBUFFER == target);
 221
 222      // a renderBufferID of 0 is acceptable - it unbinds the bound render buffer
 223      GrRenderBufferObj *renderBuffer = GR_FIND(renderBufferID,
 224                                                GrRenderBufferObj,
 225                                                GrDebugGL::kRenderBuffer_ObjTypes);
 226
 227      GrDebugGL::getInstance()->setRenderBuffer(renderBuffer);
 228  }
 229
 230  GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteTextures(GrGLsizei n, const GrGLuint* textures) {
 231
 232      // first potentially unbind the texture
 233      // TODO: move this into GrDebugGL as unBindTexture?
 234      for (unsigned int i = 0;
 235           i < GrDebugGL::getInstance()->getMaxTextureUnits();
 236           ++i) {
 237          GrTextureUnitObj *pTU = GrDebugGL::getInstance()->getTextureUnit(i);
 238
 239          if (pTU->getTexture()) {
 240              for (int j = 0; j < n; ++j) {
 241
 242                  if (textures[j] == pTU->getTexture()->getID()) {
 243                      // this ID is the current texture - revert the binding to 0
 244                      pTU->setTexture(NULL);
 245                  }
 246              }
 247          }
 248      }
 249
 250      // TODO: fuse the following block with DeleteRenderBuffers?
 251      // Open GL will remove a deleted render buffer from the active
 252      // frame buffer but not from any other frame buffer
 253      if (GrDebugGL::getInstance()->getFrameBuffer()) {
 254
 255          GrFrameBufferObj *frameBuffer = GrDebugGL::getInstance()->getFrameBuffer();
 256
 257          for (int i = 0; i < n; ++i) {
 258
 259              if (frameBuffer->getColor() &&
 260                  textures[i] == frameBuffer->getColor()->getID()) {
 261                  frameBuffer->setColor(NULL);
 262              }
 263              if (frameBuffer->getDepth() &&
 264                  textures[i] == frameBuffer->getDepth()->getID()) {
 265                  frameBuffer->setDepth(NULL);
 266              }
 267              if (frameBuffer->getStencil() &&
 268                  textures[i] == frameBuffer->getStencil()->getID()) {
 269                  frameBuffer->setStencil(NULL);
 270              }
 271          }
 272      }
 273
 274      // then actually "delete" the buffers
 275      for (int i = 0; i < n; ++i) {
 276          GrTextureObj *buffer = GR_FIND(textures[i],
 277                                         GrTextureObj,
 278                                         GrDebugGL::kTexture_ObjTypes);
 279          GrAlwaysAssert(buffer);
 280
 281          // OpenGL gives no guarantees if a texture is deleted while attached to
 282          // something other than the currently bound frame buffer
 283          GrAlwaysAssert(!buffer->getBound());
 284
 285          GrAlwaysAssert(!buffer->getDeleted());
 286          buffer->deleteAction();
 287      }
 288
 289  }
 290
 291  GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteFramebuffers(GrGLsizei n,
 292                                                         const GrGLuint *frameBuffers) {
 293
 294      // first potentially unbind the buffers
 295      if (GrDebugGL::getInstance()->getFrameBuffer()) {
 296          for (int i = 0; i < n; ++i) {
 297
 298              if (frameBuffers[i] ==
 299                  GrDebugGL::getInstance()->getFrameBuffer()->getID()) {
 300                  // this ID is the current frame buffer - rebind to the default
 301                  GrDebugGL::getInstance()->setFrameBuffer(NULL);
 302              }
 303          }
 304      }
 305
 306      // then actually "delete" the buffers
 307      for (int i = 0; i < n; ++i) {
 308          GrFrameBufferObj *buffer = GR_FIND(frameBuffers[i],
 309                                             GrFrameBufferObj,
 310                                             GrDebugGL::kFrameBuffer_ObjTypes);
 311          GrAlwaysAssert(buffer);
 312
 313          GrAlwaysAssert(!buffer->getDeleted());
 314          buffer->deleteAction();
 315      }
 316  }
 317
 318  GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteRenderbuffers(GrGLsizei n,
 319                                                          const GrGLuint *renderBuffers) {
 320
 321      // first potentially unbind the buffers
 322      if (GrDebugGL::getInstance()->getRenderBuffer()) {
 323          for (int i = 0; i < n; ++i) {
 324
 325              if (renderBuffers[i] ==
 326                  GrDebugGL::getInstance()->getRenderBuffer()->getID()) {
 327                  // this ID is the current render buffer - make no
 328                  // render buffer be bound
 329                  GrDebugGL::getInstance()->setRenderBuffer(NULL);
 330              }
 331          }
 332      }
 333
 334      // TODO: fuse the following block with DeleteTextures?
 335      // Open GL will remove a deleted render buffer from the active frame
 336      // buffer but not from any other frame buffer
 337      if (GrDebugGL::getInstance()->getFrameBuffer()) {
 338
 339          GrFrameBufferObj *frameBuffer =
 340                                GrDebugGL::getInstance()->getFrameBuffer();
 341
 342          for (int i = 0; i < n; ++i) {
 343
 344              if (frameBuffer->getColor() &&
 345                  renderBuffers[i] == frameBuffer->getColor()->getID()) {
 346                  frameBuffer->setColor(NULL);
 347              }
 348              if (frameBuffer->getDepth() &&
 349                  renderBuffers[i] == frameBuffer->getDepth()->getID()) {
 350                  frameBuffer->setDepth(NULL);
 351              }
 352              if (frameBuffer->getStencil() &&
 353                  renderBuffers[i] == frameBuffer->getStencil()->getID()) {
 354                  frameBuffer->setStencil(NULL);
 355              }
 356          }
 357      }
 358
 359      // then actually "delete" the buffers
 360      for (int i = 0; i < n; ++i) {
 361          GrRenderBufferObj *buffer = GR_FIND(renderBuffers[i],
 362                                              GrRenderBufferObj,
 363                                              GrDebugGL::kRenderBuffer_ObjTypes);
 364          GrAlwaysAssert(buffer);
 365
 366          // OpenGL gives no guarantees if a render buffer is deleted
 367          // while attached to something other than the currently
 368          // bound frame buffer
 369          GrAlwaysAssert(!buffer->getColorBound());
 370          GrAlwaysAssert(!buffer->getDepthBound());
 371          // However, at GrContext destroy time we release all GrRsources and so stencil buffers
 372          // may get deleted before FBOs that refer to them.
 373          //GrAlwaysAssert(!buffer->getStencilBound());
 374
 375          GrAlwaysAssert(!buffer->getDeleted());
 376          buffer->deleteAction();
 377      }
 378  }
 379
 380  GrGLvoid GR_GL_FUNCTION_TYPE debugGLFramebufferRenderbuffer(GrGLenum target,
 381                                                              GrGLenum attachment,
 382                                                              GrGLenum renderbuffertarget,
 383                                                              GrGLuint renderBufferID) {
 384
 385      GrAlwaysAssert(GR_GL_FRAMEBUFFER == target);
 386      GrAlwaysAssert(GR_GL_COLOR_ATTACHMENT0 == attachment ||
 387                     GR_GL_DEPTH_ATTACHMENT == attachment ||
 388                     GR_GL_STENCIL_ATTACHMENT == attachment);
 389      GrAlwaysAssert(GR_GL_RENDERBUFFER == renderbuffertarget);
 390
 391      GrFrameBufferObj *framebuffer = GrDebugGL::getInstance()->getFrameBuffer();
 392      // A render buffer cannot be attached to the default framebuffer
 393      GrAlwaysAssert(framebuffer);
 394
 395      // a renderBufferID of 0 is acceptable - it unbinds the current
 396      // render buffer
 397      GrRenderBufferObj *renderbuffer = GR_FIND(renderBufferID,
 398                                                GrRenderBufferObj,
 399                                                GrDebugGL::kRenderBuffer_ObjTypes);
 400
 401      switch (attachment) {
 402      case GR_GL_COLOR_ATTACHMENT0:
 403          framebuffer->setColor(renderbuffer);
 404          break;
 405      case GR_GL_DEPTH_ATTACHMENT:
 406          framebuffer->setDepth(renderbuffer);
 407          break;
 408      case GR_GL_STENCIL_ATTACHMENT:
 409          framebuffer->setStencil(renderbuffer);
 410          break;
 411      default:
 412          GrAlwaysAssert(false);
 413          break;
 414      };
 415
 416  }
 417
 418  ////////////////////////////////////////////////////////////////////////////////
 419  GrGLvoid GR_GL_FUNCTION_TYPE debugGLFramebufferTexture2D(GrGLenum target,
 420                                                           GrGLenum attachment,
 421                                                           GrGLenum textarget,
 422                                                           GrGLuint textureID,
 423                                                           GrGLint level) {
 424
 425      GrAlwaysAssert(GR_GL_FRAMEBUFFER == target);
 426      GrAlwaysAssert(GR_GL_COLOR_ATTACHMENT0 == attachment ||
 427                     GR_GL_DEPTH_ATTACHMENT == attachment ||
 428                     GR_GL_STENCIL_ATTACHMENT == attachment);
 429      GrAlwaysAssert(GR_GL_TEXTURE_2D == textarget);
 430
 431      GrFrameBufferObj *framebuffer = GrDebugGL::getInstance()->getFrameBuffer();
 432      // A texture cannot be attached to the default framebuffer
 433      GrAlwaysAssert(framebuffer);
 434
 435      // A textureID of 0 is allowed - it unbinds the currently bound texture
 436      GrTextureObj *texture = GR_FIND(textureID, GrTextureObj,
 437                                      GrDebugGL::kTexture_ObjTypes);
 438      if (texture) {
 439          // The texture shouldn't be bound to a texture unit - this
 440          // could lead to a feedback loop
 441          GrAlwaysAssert(!texture->getBound());
 442      }
 443
 444      GrAlwaysAssert(0 == level);
 445
 446      switch (attachment) {
 447      case GR_GL_COLOR_ATTACHMENT0:
 448          framebuffer->setColor(texture);
 449          break;
 450      case GR_GL_DEPTH_ATTACHMENT:
 451          framebuffer->setDepth(texture);
 452          break;
 453      case GR_GL_STENCIL_ATTACHMENT:
 454          framebuffer->setStencil(texture);
 455          break;
 456      default:
 457          GrAlwaysAssert(false);
 458          break;
 459      };
 460  }
 461
 462 GrGLuint GR_GL_FUNCTION_TYPE debugGLCreateProgram() {
 463
 464     GrProgramObj *program = GR_CREATE(GrProgramObj,
 465                                       GrDebugGL::kProgram_ObjTypes);
 466
 467     return program->getID();
 468 }
 469
 470 GrGLuint GR_GL_FUNCTION_TYPE debugGLCreateShader(GrGLenum type) {
 471
 472     GrAlwaysAssert(GR_GL_VERTEX_SHADER == type ||
 473                    GR_GL_FRAGMENT_SHADER == type);
 474
 475     GrShaderObj *shader = GR_CREATE(GrShaderObj, GrDebugGL::kShader_ObjTypes);
 476     shader->setType(type);
 477
 478     return shader->getID();
 479 }
 480
 481 GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteProgram(GrGLuint programID) {
 482
 483     GrProgramObj *program = GR_FIND(programID,
 484                                     GrProgramObj,
 485                                     GrDebugGL::kProgram_ObjTypes);
 486     GrAlwaysAssert(program);
 487
 488     if (program->getRefCount()) {
 489         // someone is still using this program so we can't delete it here
 490         program->setMarkedForDeletion();
 491     } else {
 492         program->deleteAction();
 493     }
 494 }
 495
 496 GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteShader(GrGLuint shaderID) {
 497
 498     GrShaderObj *shader = GR_FIND(shaderID,
 499                                   GrShaderObj,
 500                                   GrDebugGL::kShader_ObjTypes);
 501     GrAlwaysAssert(shader);
 502
 503     if (shader->getRefCount()) {
 504         // someone is still using this shader so we can't delete it here
 505         shader->setMarkedForDeletion();
 506     } else {
 507         shader->deleteAction();
 508     }
 509 }
 510
 511 GrGLvoid debugGenObjs(GrDebugGL::GrObjTypes type,
 512                       GrGLsizei n,
 513                       GrGLuint* ids) {
 514
 515    for (int i = 0; i < n; ++i) {
 516         GrFakeRefObj *obj = GrDebugGL::getInstance()->createObj(type);
 517         GrAlwaysAssert(obj);
 518         ids[i] = obj->getID();
 519     }
 520 }
 521
 522 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenBuffers(GrGLsizei n, GrGLuint* ids) {
 523     debugGenObjs(GrDebugGL::kBuffer_ObjTypes, n, ids);
 524 }
 525
 526 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenerateMipmap(GrGLenum level) {
 527 }
 528
 529 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenFramebuffers(GrGLsizei n,
 530                                                     GrGLuint* ids) {
 531     debugGenObjs(GrDebugGL::kFrameBuffer_ObjTypes, n, ids);
 532 }
 533
 534 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenRenderbuffers(GrGLsizei n,
 535                                                      GrGLuint* ids) {
 536     debugGenObjs(GrDebugGL::kRenderBuffer_ObjTypes, n, ids);
 537 }
 538
 539 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenTextures(GrGLsizei n, GrGLuint* ids) {
 540     debugGenObjs(GrDebugGL::kTexture_ObjTypes, n, ids);
 541 }
 542
 543 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGenVertexArrays(GrGLsizei n, GrGLuint* ids) {
 544     debugGenObjs(GrDebugGL::kVertexArray_ObjTypes, n, ids);
 545 }
 546
 547 GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteVertexArrays(GrGLsizei n, const GrGLuint* ids) {
 548     for (GrGLsizei i = 0; i < n; ++i) {
 549         GrVertexArrayObj* array =
 550             GR_FIND(ids[i], GrVertexArrayObj, GrDebugGL::kVertexArray_ObjTypes);
 551         GrAlwaysAssert(array);
 552
 553         // Deleting the current vertex array binds object 0
 554         if (GrDebugGL::getInstance()->getVertexArray() == array) {
 555             GrDebugGL::getInstance()->setVertexArray(NULL);
 556         }
 557
 558         if (array->getRefCount()) {
 559             // someone is still using this vertex array so we can't delete it here
 560             array->setMarkedForDeletion();
 561         } else {
 562             array->deleteAction();
 563         }
 564     }
 565 }
 566
 567 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindVertexArray(GrGLuint id) {
 568     GrVertexArrayObj* array = GR_FIND(id, GrVertexArrayObj, GrDebugGL::kVertexArray_ObjTypes);
 569     GrAlwaysAssert((0 == id) || array);
 570     GrDebugGL::getInstance()->setVertexArray(array);
 571 }
 572
 573 GrGLvoid GR_GL_FUNCTION_TYPE debugGLBindBuffer(GrGLenum target, GrGLuint bufferID) {
 574     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target || GR_GL_ELEMENT_ARRAY_BUFFER == target);
 575
 576     GrBufferObj *buffer = GR_FIND(bufferID,
 577                                   GrBufferObj,
 578                                   GrDebugGL::kBuffer_ObjTypes);
 579     // 0 is a permissible bufferID - it unbinds the current buffer
 580
 581     switch (target) {
 582         case GR_GL_ARRAY_BUFFER:
 583             GrDebugGL::getInstance()->setArrayBuffer(buffer);
 584             break;
 585         case GR_GL_ELEMENT_ARRAY_BUFFER:
 586             GrDebugGL::getInstance()->setElementArrayBuffer(buffer);
 587             break;
 588         default:
 589             SkFAIL("Unexpected target to glBindBuffer");
 590             break;
 591     }
 592 }
 593
 594 // deleting a bound buffer has the side effect of binding 0
 595 GrGLvoid GR_GL_FUNCTION_TYPE debugGLDeleteBuffers(GrGLsizei n, const GrGLuint* ids) {
 596     // first potentially unbind the buffers
 597     for (int i = 0; i < n; ++i) {
 598
 599         if (GrDebugGL::getInstance()->getArrayBuffer() &&
 600             ids[i] == GrDebugGL::getInstance()->getArrayBuffer()->getID()) {
 601             // this ID is the current array buffer
 602             GrDebugGL::getInstance()->setArrayBuffer(NULL);
 603         }
 604         if (GrDebugGL::getInstance()->getElementArrayBuffer() &&
 605             ids[i] ==
 606                 GrDebugGL::getInstance()->getElementArrayBuffer()->getID()) {
 607             // this ID is the current element array buffer
 608             GrDebugGL::getInstance()->setElementArrayBuffer(NULL);
 609         }
 610     }
 611
 612     // then actually "delete" the buffers
 613     for (int i = 0; i < n; ++i) {
 614         GrBufferObj *buffer = GR_FIND(ids[i],
 615                                       GrBufferObj,
 616                                       GrDebugGL::kBuffer_ObjTypes);
 617         GrAlwaysAssert(buffer);
 618
 619         GrAlwaysAssert(!buffer->getDeleted());
 620         buffer->deleteAction();
 621     }
 622 }
 623
 624 // map a buffer to the caller's address space
 625 GrGLvoid* GR_GL_FUNCTION_TYPE debugGLMapBufferRange(GrGLenum target, GrGLintptr offset,
 626                                                     GrGLsizeiptr length, GrGLbitfield access) {
 627     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target ||
 628                    GR_GL_ELEMENT_ARRAY_BUFFER == target);
 629
 630     // We only expect read access and we expect that the buffer or range is always invalidated.
 631     GrAlwaysAssert(!SkToBool(GR_GL_MAP_READ_BIT & access));
 632     GrAlwaysAssert((GR_GL_MAP_INVALIDATE_BUFFER_BIT | GR_GL_MAP_INVALIDATE_RANGE_BIT) & access);
 633
 634     GrBufferObj *buffer = NULL;
 635     switch (target) {
 636         case GR_GL_ARRAY_BUFFER:
 637             buffer = GrDebugGL::getInstance()->getArrayBuffer();
 638             break;
 639         case GR_GL_ELEMENT_ARRAY_BUFFER:
 640             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
 641             break;
 642         default:
 643             SkFAIL("Unexpected target to glMapBufferRange");
 644             break;
 645     }
 646
 647     if (buffer) {
 648         GrAlwaysAssert(offset >= 0 && offset + length <= buffer->getSize());
 649         GrAlwaysAssert(!buffer->getMapped());
 650         buffer->setMapped(offset, length);
 651         return buffer->getDataPtr() + offset;
 652     }
 653
 654     GrAlwaysAssert(false);
 655     return NULL;        // no buffer bound to the target
 656 }
 657
 658 GrGLvoid* GR_GL_FUNCTION_TYPE debugGLMapBuffer(GrGLenum target, GrGLenum access) {
 659     GrAlwaysAssert(GR_GL_WRITE_ONLY == access);
 660
 661     GrBufferObj *buffer = NULL;
 662     switch (target) {
 663         case GR_GL_ARRAY_BUFFER:
 664             buffer = GrDebugGL::getInstance()->getArrayBuffer();
 665             break;
 666         case GR_GL_ELEMENT_ARRAY_BUFFER:
 667             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
 668             break;
 669         default:
 670             SkFAIL("Unexpected target to glMapBuffer");
 671             break;
 672     }
 673
 674     return debugGLMapBufferRange(target, 0, buffer->getSize(),
 675                                  GR_GL_MAP_WRITE_BIT | GR_GL_MAP_INVALIDATE_BUFFER_BIT);
 676 }
 677
 678 // remove a buffer from the caller's address space
 679 // TODO: check if the "access" method from "glMapBuffer" was honored
 680 GrGLboolean GR_GL_FUNCTION_TYPE debugGLUnmapBuffer(GrGLenum target) {
 681
 682     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target ||
 683                    GR_GL_ELEMENT_ARRAY_BUFFER == target);
 684
 685     GrBufferObj *buffer = NULL;
 686     switch (target) {
 687         case GR_GL_ARRAY_BUFFER:
 688             buffer = GrDebugGL::getInstance()->getArrayBuffer();
 689             break;
 690         case GR_GL_ELEMENT_ARRAY_BUFFER:
 691             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
 692             break;
 693         default:
 694             SkFAIL("Unexpected target to glUnmapBuffer");
 695             break;
 696     }
 697
 698     if (buffer) {
 699         GrAlwaysAssert(buffer->getMapped());
 700         buffer->resetMapped();
 701         return GR_GL_TRUE;
 702     }
 703
 704     GrAlwaysAssert(false);
 705     return GR_GL_FALSE; // GR_GL_INVALID_OPERATION;
 706 }
 707
 708 GrGLvoid GR_GL_FUNCTION_TYPE debugGLFlushMappedBufferRange(GrGLenum target,
 709                                                            GrGLintptr offset,
 710                                                            GrGLsizeiptr length) {
 711     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target ||
 712                    GR_GL_ELEMENT_ARRAY_BUFFER == target);
 713
 714     GrBufferObj *buffer = NULL;
 715     switch (target) {
 716         case GR_GL_ARRAY_BUFFER:
 717             buffer = GrDebugGL::getInstance()->getArrayBuffer();
 718             break;
 719         case GR_GL_ELEMENT_ARRAY_BUFFER:
 720             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
 721             break;
 722         default:
 723             SkFAIL("Unexpected target to glUnmapBuffer");
 724             break;
 725     }
 726
 727     if (buffer) {
 728         GrAlwaysAssert(buffer->getMapped());
 729         GrAlwaysAssert(offset >= 0 && (offset + length) <= buffer->getMappedLength());
 730     } else {
 731         GrAlwaysAssert(false);
 732     }
 733 }
 734
 735
 736 GrGLvoid GR_GL_FUNCTION_TYPE debugGLGetBufferParameteriv(GrGLenum target,
 737                                                          GrGLenum value,
 738                                                          GrGLint* params) {
 739
 740     GrAlwaysAssert(GR_GL_ARRAY_BUFFER == target ||
 741                    GR_GL_ELEMENT_ARRAY_BUFFER == target);
 742     GrAlwaysAssert(GR_GL_BUFFER_SIZE == value ||
 743                    GR_GL_BUFFER_USAGE == value);
 744
 745     GrBufferObj *buffer = NULL;
 746     switch (target) {
 747         case GR_GL_ARRAY_BUFFER:
 748             buffer = GrDebugGL::getInstance()->getArrayBuffer();
 749             break;
 750         case GR_GL_ELEMENT_ARRAY_BUFFER:
 751             buffer = GrDebugGL::getInstance()->getElementArrayBuffer();
 752             break;
 753     }
 754
 755     GrAlwaysAssert(buffer);
 756
 757     switch (value) {
 758         case GR_GL_BUFFER_MAPPED:
 759             *params = GR_GL_FALSE;
 760             if (buffer)
 761                 *params = buffer->getMapped() ? GR_GL_TRUE : GR_GL_FALSE;
 762             break;
 763         case GR_GL_BUFFER_SIZE:
 764             *params = 0;
 765             if (buffer)
 766                 *params = SkToInt(buffer->getSize());
 767             break;
 768         case GR_GL_BUFFER_USAGE:
 769             *params = GR_GL_STATIC_DRAW;
 770             if (buffer)
 771                 *params = buffer->getUsage();
 772             break;
 773         default:
 774             SkFAIL("Unexpected value to glGetBufferParamateriv");
 775             break;
 776     }
 777 };
 778 } // end of namespace
 779
 780 ////////////////////////////////////////////////////////////////////////////////
 781 struct GrDebugGLInterface : public GrGLInterface {
 782
 783 public:
 784     SK_DECLARE_INST_COUNT(GrDebugGLInterface)
 785
 786     GrDebugGLInterface()
 787         : fWrapped(NULL) {
 788         GrDebugGL::staticRef();
 789     }
 790
 791     virtual ~GrDebugGLInterface() {
 792         GrDebugGL::staticUnRef();
 793     }
 794
 795     void setWrapped(GrGLInterface *interface) {
 796         fWrapped.reset(interface);
 797     }
 798
 799     virtual void abandon() const SK_OVERRIDE {
 800         GrDebugGL::abandon();
 801     }
 802
 803     // TODO: there are some issues w/ wrapping another GL interface inside the
 804     // debug interface:
 805     //      Since none of the "gl" methods are member functions they don't get
 806     //      a "this" pointer through which to access "fWrapped"
 807     //      This could be worked around by having all of them access the
 808     //      "glInterface" pointer - i.e., treating the debug interface as a
 809     //      true singleton
 810     //
 811     //      The problem with this is that we also want to handle OpenGL
 812     //      contexts. The natural way to do this is to have multiple debug
 813     //      interfaces. Each of which represents a separate context. The
 814     //      static ID count would still uniquify IDs across all of them.
 815     //      The problem then is that we couldn't treat the debug GL
 816     //      interface as a singleton (since there would be one for each
 817     //      context).
 818     //
 819     //      The solution to this is probably to alter SkDebugGlContext's
 820     //      "makeCurrent" method to make a call like "makeCurrent(this)" to
 821     //      the debug GL interface (assuming that the application will create
 822     //      multiple SkGLContext's) to let it switch between the active
 823     //      context. Everything in the GrDebugGL object would then need to be
 824     //      moved to a GrContextObj and the GrDebugGL object would just switch
 825     //      between them. Note that this approach would also require that
 826     //      SkDebugGLContext wrap an arbitrary other context
 827     //      and then pass the wrapped interface to the debug GL interface.
 828
 829 protected:
 830 private:
 831
 832     SkAutoTUnref<GrGLInterface> fWrapped;
 833
 834     typedef GrGLInterface INHERITED;
 835 };
 836
 837 ////////////////////////////////////////////////////////////////////////////////
 838 const GrGLInterface* GrGLCreateDebugInterface() {
 839     GrGLInterface* interface = SkNEW(GrDebugGLInterface);
 840
 841     interface->fStandard = kGL_GrGLStandard;
 842
 843     GrGLInterface::Functions* functions = &interface->fFunctions;
 844     functions->fActiveTexture = debugGLActiveTexture;
 845     functions->fAttachShader = debugGLAttachShader;
 846     functions->fBeginQuery = debugGLBeginQuery;
 847     functions->fBindAttribLocation = debugGLBindAttribLocation;
 848     functions->fBindBuffer = debugGLBindBuffer;
 849     functions->fBindFragDataLocation = noOpGLBindFragDataLocation;
 850     functions->fBindTexture = debugGLBindTexture;
 851     functions->fBindVertexArray = debugGLBindVertexArray;
 852     functions->fBlendColor = noOpGLBlendColor;
 853     functions->fBlendFunc = noOpGLBlendFunc;
 854     functions->fBufferData = debugGLBufferData;
 855     functions->fBufferSubData = noOpGLBufferSubData;
 856     functions->fClear = noOpGLClear;
 857     functions->fClearColor = noOpGLClearColor;
 858     functions->fClearStencil = noOpGLClearStencil;
 859     functions->fColorMask = noOpGLColorMask;
 860     functions->fCompileShader = noOpGLCompileShader;
 861     functions->fCompressedTexImage2D = noOpGLCompressedTexImage2D;
 862     functions->fCompressedTexSubImage2D = noOpGLCompressedTexSubImage2D;
 863     functions->fCopyTexSubImage2D = noOpGLCopyTexSubImage2D;
 864     functions->fCreateProgram = debugGLCreateProgram;
 865     functions->fCreateShader = debugGLCreateShader;
 866     functions->fCullFace = noOpGLCullFace;
 867     functions->fDeleteBuffers = debugGLDeleteBuffers;
 868     functions->fDeleteProgram = debugGLDeleteProgram;
 869     functions->fDeleteQueries = noOpGLDeleteIds;
 870     functions->fDeleteShader = debugGLDeleteShader;
 871     functions->fDeleteTextures = debugGLDeleteTextures;
 872     functions->fDeleteVertexArrays = debugGLDeleteVertexArrays;
 873     functions->fDepthMask = noOpGLDepthMask;
 874     functions->fDisable = noOpGLDisable;
 875     functions->fDisableVertexAttribArray = noOpGLDisableVertexAttribArray;
 876     functions->fDrawArrays = noOpGLDrawArrays;
 877     functions->fDrawBuffer = noOpGLDrawBuffer;
 878     functions->fDrawBuffers = noOpGLDrawBuffers;
 879     functions->fDrawElements = noOpGLDrawElements;
 880     functions->fEnable = noOpGLEnable;
 881     functions->fEnableVertexAttribArray = noOpGLEnableVertexAttribArray;
 882     functions->fEndQuery = noOpGLEndQuery;
 883     functions->fFinish = noOpGLFinish;
 884     functions->fFlush = noOpGLFlush;
 885     functions->fFlushMappedBufferRange = debugGLFlushMappedBufferRange;
 886     functions->fFrontFace = noOpGLFrontFace;
 887     functions->fGenerateMipmap = debugGLGenerateMipmap;
 888     functions->fGenBuffers = debugGLGenBuffers;
 889     functions->fGenQueries = noOpGLGenIds;
 890     functions->fGenTextures = debugGLGenTextures;
 891     functions->fGetBufferParameteriv = debugGLGetBufferParameteriv;
 892     functions->fGetError = noOpGLGetError;
 893     functions->fGetIntegerv = noOpGLGetIntegerv;
 894     functions->fGetQueryObjecti64v = noOpGLGetQueryObjecti64v;
 895     functions->fGetQueryObjectiv = noOpGLGetQueryObjectiv;
 896     functions->fGetQueryObjectui64v = noOpGLGetQueryObjectui64v;
 897     functions->fGetQueryObjectuiv = noOpGLGetQueryObjectuiv;
 898     functions->fGetQueryiv = noOpGLGetQueryiv;
 899     functions->fGetProgramInfoLog = noOpGLGetInfoLog;
 900     functions->fGetProgramiv = noOpGLGetShaderOrProgramiv;
 901     functions->fGetShaderInfoLog = noOpGLGetInfoLog;
 902     functions->fGetShaderiv = noOpGLGetShaderOrProgramiv;
 903     functions->fGetString = noOpGLGetString;
 904     functions->fGetStringi = noOpGLGetStringi;
 905     functions->fGetTexLevelParameteriv = noOpGLGetTexLevelParameteriv;
 906     functions->fGetUniformLocation = noOpGLGetUniformLocation;
 907     functions->fGenVertexArrays = debugGLGenVertexArrays;
 908     functions->fLineWidth = noOpGLLineWidth;
 909     functions->fLinkProgram = noOpGLLinkProgram;
 910     functions->fMapBuffer = debugGLMapBuffer;
 911     functions->fMapBufferRange = debugGLMapBufferRange;
 912     functions->fPixelStorei = debugGLPixelStorei;
 913     functions->fQueryCounter = noOpGLQueryCounter;
 914     functions->fReadBuffer = noOpGLReadBuffer;
 915     functions->fReadPixels = debugGLReadPixels;
 916     functions->fScissor = noOpGLScissor;
 917     functions->fShaderSource = noOpGLShaderSource;
 918     functions->fStencilFunc = noOpGLStencilFunc;
 919     functions->fStencilFuncSeparate = noOpGLStencilFuncSeparate;
 920     functions->fStencilMask = noOpGLStencilMask;
 921     functions->fStencilMaskSeparate = noOpGLStencilMaskSeparate;
 922     functions->fStencilOp = noOpGLStencilOp;
 923     functions->fStencilOpSeparate = noOpGLStencilOpSeparate;
 924     functions->fTexImage2D = noOpGLTexImage2D;
 925     functions->fTexParameteri = noOpGLTexParameteri;
 926     functions->fTexParameteriv = noOpGLTexParameteriv;
 927     functions->fTexSubImage2D = noOpGLTexSubImage2D;
 928     functions->fTexStorage2D = noOpGLTexStorage2D;
 929     functions->fDiscardFramebuffer = noOpGLDiscardFramebuffer;
 930     functions->fUniform1f = noOpGLUniform1f;
 931     functions->fUniform1i = noOpGLUniform1i;
 932     functions->fUniform1fv = noOpGLUniform1fv;
 933     functions->fUniform1iv = noOpGLUniform1iv;
 934     functions->fUniform2f = noOpGLUniform2f;
 935     functions->fUniform2i = noOpGLUniform2i;
 936     functions->fUniform2fv = noOpGLUniform2fv;
 937     functions->fUniform2iv = noOpGLUniform2iv;
 938     functions->fUniform3f = noOpGLUniform3f;
 939     functions->fUniform3i = noOpGLUniform3i;
 940     functions->fUniform3fv = noOpGLUniform3fv;
 941     functions->fUniform3iv = noOpGLUniform3iv;
 942     functions->fUniform4f = noOpGLUniform4f;
 943     functions->fUniform4i = noOpGLUniform4i;
 944     functions->fUniform4fv = noOpGLUniform4fv;
 945     functions->fUniform4iv = noOpGLUniform4iv;
 946     functions->fUniformMatrix2fv = noOpGLUniformMatrix2fv;
 947     functions->fUniformMatrix3fv = noOpGLUniformMatrix3fv;
 948     functions->fUniformMatrix4fv = noOpGLUniformMatrix4fv;
 949     functions->fUnmapBuffer = debugGLUnmapBuffer;
 950     functions->fUseProgram = debugGLUseProgram;
 951     functions->fVertexAttrib1f = noOpGLVertexAttrib1f;
 952     functions->fVertexAttrib2fv = noOpGLVertexAttrib2fv;
 953     functions->fVertexAttrib3fv = noOpGLVertexAttrib3fv;
 954     functions->fVertexAttrib4fv = noOpGLVertexAttrib4fv;
 955     functions->fVertexAttribPointer = noOpGLVertexAttribPointer;
 956     functions->fViewport = noOpGLViewport;
 957     functions->fBindFramebuffer = debugGLBindFramebuffer;
 958     functions->fBindRenderbuffer = debugGLBindRenderbuffer;
 959     functions->fCheckFramebufferStatus = noOpGLCheckFramebufferStatus;
 960     functions->fDeleteFramebuffers = debugGLDeleteFramebuffers;
 961     functions->fDeleteRenderbuffers = debugGLDeleteRenderbuffers;
 962     functions->fFramebufferRenderbuffer = debugGLFramebufferRenderbuffer;
 963     functions->fFramebufferTexture2D = debugGLFramebufferTexture2D;
 964     functions->fGenFramebuffers = debugGLGenFramebuffers;
 965     functions->fGenRenderbuffers = debugGLGenRenderbuffers;
 966     functions->fGetFramebufferAttachmentParameteriv =
 967                                     noOpGLGetFramebufferAttachmentParameteriv;
 968     functions->fGetRenderbufferParameteriv = noOpGLGetRenderbufferParameteriv;
 969     functions->fRenderbufferStorage = noOpGLRenderbufferStorage;
 970     functions->fRenderbufferStorageMultisample =
 971                                     noOpGLRenderbufferStorageMultisample;
 972     functions->fBlitFramebuffer = noOpGLBlitFramebuffer;
 973     functions->fResolveMultisampleFramebuffer =
 974                                     noOpGLResolveMultisampleFramebuffer;
 975     functions->fMatrixLoadf = noOpGLMatrixLoadf;
 976     functions->fMatrixLoadIdentity = noOpGLMatrixLoadIdentity;
 977
 978     functions->fBindFragDataLocationIndexed =
 979                                     noOpGLBindFragDataLocationIndexed;
 980
 981     interface->fExtensions.init(kGL_GrGLStandard, functions->fGetString, functions->fGetStringi,
 982                                 functions->fGetIntegerv);
 983
 984     return interface;
 985 }