dom/canvas/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 == nullptr) {
  39         array = mDefaultVertexArray;
  40     }
  41
  42     array->BindVertexArray();
  43
  44     MOZ_ASSERT(mBoundVertexArray == array);
  45 }
  46
  47 already_AddRefed<WebGLVertexArray>
  48 WebGLContext::CreateVertexArray()
  49 {
  50     if (IsContextLost())
  51         return nullptr;
  52
  53     nsRefPtr<WebGLVertexArray> globj = WebGLVertexArray::Create(this);
  54
  55     MakeContextCurrent();
  56     globj->GenVertexArray();
  57
  58     return globj.forget();
  59 }
  60
  61 void
  62 WebGLContext::DeleteVertexArray(WebGLVertexArray *array)
  63 {
  64     if (IsContextLost())
  65         return;
  66
  67     if (array == nullptr)
  68         return;
  69
  70     if (array->IsDeleted())
  71         return;
  72
  73     if (mBoundVertexArray == array)
  74         BindVertexArray(static_cast<WebGLVertexArray*>(nullptr));
  75
  76     array->RequestDelete();
  77 }
  78
  79 bool
  80 WebGLContext::IsVertexArray(WebGLVertexArray *array)
  81 {
  82     if (IsContextLost())
  83         return false;
  84
  85     if (!array)
  86         return false;
  87
  88     return ValidateObjectAllowDeleted("isVertexArray", array) &&
  89            !array->IsDeleted() &&
  90            array->HasEverBeenBound();
  91 }