widget/src/xpwidgets/GfxInfoWebGL.cpp

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  39
  40 #include "GfxInfoWebGL.h"
  41
  42 #include "nsServiceManagerUtils.h"
  43
  44 #include "GLDefs.h"
  45 #include "nsIDOMWebGLRenderingContext.h"
  46 #include "nsICanvasRenderingContextInternal.h"
  47
  48 using namespace mozilla::widget;
  49
  50 nsresult
  51 GfxInfoWebGL::GetWebGLParameter(const nsAString& aParam, nsAString& aResult)
  52 {
  53   GLenum param;
  54
  55   if (aParam.EqualsLiteral("vendor")) param = LOCAL_GL_VENDOR;
  56   else if (aParam.EqualsLiteral("renderer")) param = LOCAL_GL_RENDERER;
  57   else if (aParam.EqualsLiteral("version")) param = LOCAL_GL_VERSION;
  58   else if (aParam.EqualsLiteral("shading_language_version")) param = LOCAL_GL_SHADING_LANGUAGE_VERSION;
  59   else if (aParam.EqualsLiteral("extensions")) param = LOCAL_GL_EXTENSIONS;
  60   else if (aParam.EqualsLiteral("full-renderer")) param = 0;
  61   else return NS_ERROR_INVALID_ARG;
  62
  63   nsCOMPtr<nsIDOMWebGLRenderingContext> webgl =
  64     do_CreateInstance("@mozilla.org/content/canvas-rendering-context;1?id=experimental-webgl");
  65   if (!webgl)
  66     return NS_ERROR_NOT_AVAILABLE;
  67
  68   nsCOMPtr<nsICanvasRenderingContextInternal> webglInternal =
  69     do_QueryInterface(webgl);
  70   if (!webglInternal)
  71     return NS_ERROR_NOT_AVAILABLE;
  72
  73   nsresult rv = webglInternal->SetDimensions(16, 16);
  74   NS_ENSURE_SUCCESS(rv, rv);
  75
  76   if (param)
  77     return webgl->MozGetUnderlyingParamString(param, aResult);
  78
  79   // this is the "full renderer" string, which is vendor + renderer + version
  80
  81   nsAutoString str;
  82
  83   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VENDOR, str);
  84   NS_ENSURE_SUCCESS(rv, rv);
  85
  86   aResult.Append(str);
  87   aResult.AppendLiteral(" -- ");
  88
  89   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_RENDERER, str);
  90   NS_ENSURE_SUCCESS(rv, rv);
  91
  92   aResult.Append(str);
  93   aResult.AppendLiteral(" -- ");
  94
  95   rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VERSION, str);
  96   NS_ENSURE_SUCCESS(rv, rv);
  97
  98   aResult.Append(str);
  99
 100   return NS_OK;
 101 }