widget/xpwidgets/GfxInfoWebGL.cpp

   1 /* vim: se cin sw=2 ts=2 et : */
   2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "GfxInfoWebGL.h"
   9
  10 #include "nsServiceManagerUtils.h"
  11
  12 #include "GLDefs.h"
  13 #include "nsIDOMWebGLRenderingContext.h"
  14 #include "nsICanvasRenderingContextInternal.h"
  15
  16 using namespace mozilla::widget;
  17
  18 nsresult
  19 GfxInfoWebGL::GetWebGLParameter(const nsAString& aParam, nsAString& aResult)
  20 {
  21   GLenum param;
  22
  23   if (aParam.EqualsLiteral("vendor")) param = LOCAL_GL_VENDOR;
  24   else if (aParam.EqualsLiteral("renderer")) param = LOCAL_GL_RENDERER;
  25   else if (aParam.EqualsLiteral("version")) param = LOCAL_GL_VERSION;
  26   else if (aParam.EqualsLiteral("shading_language_version")) param = LOCAL_GL_SHADING_LANGUAGE_VERSION;
  27   else if (aParam.EqualsLiteral("extensions")) param = LOCAL_GL_EXTENSIONS;
  28   else if (aParam.EqualsLiteral("full-renderer")) param = 0;
  29   else return NS_ERROR_INVALID_ARG;
  30
  31   nsCOMPtr<nsIDOMWebGLRenderingContext> webgl =
  32     do_CreateInstance("@mozilla.org/content/canvas-rendering-context;1?id=experimental-webgl");
  33   if (!webgl)
  34     return NS_ERROR_NOT_AVAILABLE;
  35
  36   nsCOMPtr<nsICanvasRenderingContextInternal> webglInternal =
  37     do_QueryInterface(webgl);
  38   if (!webglInternal)
  39     return NS_ERROR_NOT_AVAILABLE;
  40
  41   nsresult rv = webglInternal->SetDimensions(16, 16);
  42   NS_ENSURE_SUCCESS(rv, rv);
  43
  44   if (param)
  45     return webgl->MozGetUnderlyingParamString(param, aResult);
  46
  47   // this is the "full renderer" string, which is vendor + renderer + version
  48
  49   nsAutoString str;
  50
  51   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VENDOR, str);
  52   NS_ENSURE_SUCCESS(rv, rv);
  53
  54   aResult.Append(str);
  55   aResult.AppendLiteral(" -- ");
  56
  57   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_RENDERER, str);
  58   NS_ENSURE_SUCCESS(rv, rv);
  59
  60   aResult.Append(str);
  61   aResult.AppendLiteral(" -- ");
  62
  63   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VERSION, str);
  64   NS_ENSURE_SUCCESS(rv, rv);
  65
  66   aResult.Append(str);
  67
  68   return NS_OK;
  69 }