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
   8 #include "GLContext.h"
   9 #include "WebGLBuffer.h"
  10 #include "WebGLVertexArray.h"
  11 #include "WebGLVertexAttribData.h"
  12
  13 namespace mozilla {
  14
  15 void
  16 WebGLContext::BindVertexArray(WebGLVertexArray* array)
  17 {
  18     if (IsContextLost())
  19         return;
  20
  21     if (!ValidateObjectAllowDeletedOrNull("bindVertexArrayObject", array))
  22         return;
  23
  24     if (array && array->IsDeleted()) {
  25         /* http://www.khronos.org/registry/gles/extensions/OES/OES_vertex_array_object.txt
  26          * BindVertexArrayOES fails and an INVALID_OPERATION error is
  27          * generated if array is not a name returned from a previous call to
  28          * GenVertexArraysOES, or if such a name has since been deleted with
  29          * DeleteVertexArraysOES
  30          */
  31         ErrorInvalidOperation("bindVertexArray: can't bind a deleted array!");
  32         return;
  33     }
  34
  35     InvalidateBufferFetching();
  36
  37     MakeContextCurrent();
  38
  39     if (array == nullptr) {
  40         array = mDefaultVertexArray;
  41     }
  42
  43     array->BindVertexArray();
  44
  45     MOZ_ASSERT(mBoundVertexArray == array);
  46 }
  47
  48 already_AddRefed<WebGLVertexArray>
  49 WebGLContext::CreateVertexArray()
  50 {
  51     if (IsContextLost())
  52         return nullptr;
  53
  54     nsRefPtr<WebGLVertexArray> globj = WebGLVertexArray::Create(this);
  55
  56     MakeContextCurrent();
  57     globj->GenVertexArray();
  58
  59     return globj.forget();
  60 }
  61
  62 void
  63 WebGLContext::DeleteVertexArray(WebGLVertexArray* array)
  64 {
  65     if (IsContextLost())
  66         return;
  67
  68     if (array == nullptr)
  69         return;
  70
  71     if (array->IsDeleted())
  72         return;
  73
  74     if (mBoundVertexArray == array)
  75         BindVertexArray(static_cast<WebGLVertexArray*>(nullptr));
  76
  77     array->RequestDelete();
  78 }
  79
  80 bool
  81 WebGLContext::IsVertexArray(WebGLVertexArray* array)
  82 {
  83     if (IsContextLost())
  84         return false;
  85
  86     if (!array)
  87         return false;
  88
  89     return ValidateObjectAllowDeleted("isVertexArray", array) &&
  90            !array->IsDeleted() &&
  91            array->HasEverBeenBound();
  92 }
  93
  94 } // namespace mozilla