content/canvas/src/WebGLContextVertexArray.cpp

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "WebGLContext.h"
   7 #include "WebGLBuffer.h"
   8 #include "WebGLVertexAttribData.h"
   9 #include "WebGLVertexArray.h"
  10 #include "GLContext.h"
  11
  12 using namespace mozilla;
  13
  14 void
  15 WebGLContext::BindVertexArray(WebGLVertexArray *array)
  16 {
  17     if (IsContextLost())
  18         return;
  19
  20     if (!ValidateObjectAllowDeletedOrNull("bindVertexArrayObject", array))
  21         return;
  22
  23     if (array && array->IsDeleted()) {
  24         /* http://www.khronos.org/registry/gles/extensions/OES/OES_vertex_array_object.txt
  25          * BindVertexArrayOES fails and an INVALID_OPERATION error is
  26          * generated if array is not a name returned from a previous call to
  27          * GenVertexArraysOES, or if such a name has since been deleted with
  28          * DeleteVertexArraysOES
  29          */
  30         ErrorInvalidOperation("bindVertexArray: can't bind a deleted array!");
  31         return;
  32     }
  33
  34     InvalidateBufferFetching();
  35
  36     MakeContextCurrent();
  37
  38     if (array) {
  39         gl->fBindVertexArray(array->GLName());
  40         array->SetHasEverBeenBound(true);
  41         mBoundVertexArray = array;
  42     }
  43     else {
  44         gl->fBindVertexArray(0);
  45         mBoundVertexArray = mDefaultVertexArray;
  46     }
  47 }
  48
  49 already_AddRefed<WebGLVertexArray>
  50 WebGLContext::CreateVertexArray()
  51 {
  52     if (IsContextLost())
  53         return nullptr;
  54
  55     nsRefPtr<WebGLVertexArray> globj = new WebGLVertexArray(this);
  56
  57     MakeContextCurrent();
  58     gl->fGenVertexArrays(1, &globj->mGLName);
  59
  60     mVertexArrays.insertBack(globj);
  61
  62     return globj.forget();
  63 }
  64
  65 void
  66 WebGLContext::DeleteVertexArray(WebGLVertexArray *array)
  67 {
  68     if (IsContextLost())
  69         return;
  70
  71     if (array == nullptr)
  72         return;
  73
  74     if (array->IsDeleted())
  75         return;
  76
  77     if (mBoundVertexArray == array)
  78         BindVertexArray(static_cast<WebGLVertexArray*>(nullptr));
  79
  80     array->RequestDelete();
  81 }
  82
  83 bool
  84 WebGLContext::IsVertexArray(WebGLVertexArray *array)
  85 {
  86     if (IsContextLost())
  87         return false;
  88
  89     if (!array)
  90         return false;
  91
  92     return ValidateObjectAllowDeleted("isVertexArray", array) &&
  93            !array->IsDeleted() &&
  94            array->HasEverBeenBound();
  95 }
  96
  97