widget/GfxInfoWebGL.cpp
author cku <cku@mozilla.com>
Fri, 05 May 2017 17:19:43 +0800
changeset 359137 f3460d42d23cb21093146a2ace98009d581bd77a
parent 216107 7025a18fc63bdd98b777a038f8aeda2184d439c4
permissions -rw-r--r--
Bug 1351440 - Part 2. Encapsulate DrawResult and imgIContainer::FLAG_* into imgDrawingParams, and pass it to PaintSVG. r=jwatt The DrawResult return was not in fact anything to do with the success or failure of that method, but was actually passing out a very specific piece of information about the success or failure of any imagelib drawing that may not have occurred under the various PaintSVG calls. The signature of PaintSVG is changed from DrawResult PaintSVG(...., uint32 flags); to void PaintSVG(...., imgDrawingParams& aPackage); imgDrawingParams wraps DrawResult and imgIContainer::FLAG_* as a pack, pass through PaintSVG to imagelib draw calls under beneath. MozReview-Commit-ID: IOq2evUAOQF

/* vim: se cin sw=2 ts=2 et : */
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "GfxInfoWebGL.h"

#include "nsServiceManagerUtils.h"

#include "GLDefs.h"
#include "nsIDOMWebGLRenderingContext.h"
#include "nsICanvasRenderingContextInternal.h"

using namespace mozilla::widget;

nsresult
GfxInfoWebGL::GetWebGLParameter(const nsAString& aParam, nsAString& aResult)
{
  GLenum param;

  if (aParam.EqualsLiteral("vendor")) param = LOCAL_GL_VENDOR;
  else if (aParam.EqualsLiteral("renderer")) param = LOCAL_GL_RENDERER;
  else if (aParam.EqualsLiteral("version")) param = LOCAL_GL_VERSION;
  else if (aParam.EqualsLiteral("shading_language_version")) param = LOCAL_GL_SHADING_LANGUAGE_VERSION;
  else if (aParam.EqualsLiteral("extensions")) param = LOCAL_GL_EXTENSIONS;
  else if (aParam.EqualsLiteral("full-renderer")) param = 0;
  else return NS_ERROR_INVALID_ARG;

  nsCOMPtr<nsIDOMWebGLRenderingContext> webgl =
    do_CreateInstance("@mozilla.org/content/canvas-rendering-context;1?id=webgl");
  if (!webgl)
    return NS_ERROR_NOT_AVAILABLE;

  nsCOMPtr<nsICanvasRenderingContextInternal> webglInternal =
    do_QueryInterface(webgl);
  if (!webglInternal)
    return NS_ERROR_NOT_AVAILABLE;

  nsresult rv = webglInternal->SetDimensions(16, 16);
  NS_ENSURE_SUCCESS(rv, rv);

  if (param)
    return webgl->MozGetUnderlyingParamString(param, aResult);

  // this is the "full renderer" string, which is vendor + renderer + version

  nsAutoString str;

  rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VENDOR, str);
  NS_ENSURE_SUCCESS(rv, rv);

  aResult.Append(str);
  aResult.AppendLiteral(" -- ");

  rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_RENDERER, str);
  NS_ENSURE_SUCCESS(rv, rv);

  aResult.Append(str);
  aResult.AppendLiteral(" -- ");

  rv = webgl->MozGetUnderlyingParamString(LOCAL_GL_VERSION, str);
  NS_ENSURE_SUCCESS(rv, rv);

  aResult.Append(str);

  return NS_OK;
}