/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "WebGLExtensions.h"

#include "mozilla/dom/WebGLRenderingContextBinding.h"
#include "GLContext.h"
#include "WebGLContext.h"
#include "WebGLContextUtils.h"

namespace mozilla {

WebGLExtensionMOZDebug::WebGLExtensionMOZDebug(WebGLContext* webgl)
    : WebGLExtensionBase(webgl)
{
}

WebGLExtensionMOZDebug::~WebGLExtensionMOZDebug()
{
}

void
WebGLExtensionMOZDebug::GetParameter(JSContext* cx, GLenum pname,
                                     JS::MutableHandle<JS::Value> retval,
                                     ErrorResult& er) const
{
    const auto& gl = mContext->gl;
    gl->MakeCurrent();

    switch (pname) {
    case LOCAL_GL_EXTENSIONS:
        {
            nsString ret;
            if (!gl->IsCoreProfile()) {
                const auto rawExts = (const char*)gl->fGetString(LOCAL_GL_EXTENSIONS);
                ret = NS_ConvertUTF8toUTF16(rawExts);
            } else {
                const auto& numExts = gl->GetIntAs<GLuint>(LOCAL_GL_NUM_EXTENSIONS);
                for (GLuint i = 0; i < numExts; i++) {
                    const auto rawExt = (const char*)gl->fGetStringi(LOCAL_GL_EXTENSIONS,
                                                                     i);
                    if (i > 0) {
                        ret.AppendLiteral(" ");
                    }
                    ret.Append(NS_ConvertUTF8toUTF16(rawExt));
                }
            }
            retval.set(StringValue(cx, ret, er));
            return;
        }

    case LOCAL_GL_RENDERER:
    case LOCAL_GL_VENDOR:
    case LOCAL_GL_VERSION:
        {
            const auto raw = (const char*)gl->fGetString(pname);
            retval.set(StringValue(cx, NS_ConvertUTF8toUTF16(raw), er));
            return;
        }

    case 0x10000: // "WSI_INFO"
        {
            nsCString info;
            gl->GetWSIInfo(&info);
            retval.set(StringValue(cx, NS_ConvertUTF8toUTF16(info), er));
            return;
        }

    default:
        mContext->ErrorInvalidEnumArg("MOZ_debug.getParameter", "pname", pname);
        retval.set(JS::NullValue());
        return;
    }
}

IMPL_WEBGL_EXTENSION_GOOP(WebGLExtensionMOZDebug, MOZ_debug)

} // namespace mozilla
