/* -*- Mode: C++; tab-width: 4; 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 "WebGL2Context.h"

#include "GLContext.h"

#include "WebGLSync.h"

namespace mozilla {

// -------------------------------------------------------------------------

// Sync objects

already_AddRefed<WebGLSync>

WebGL2Context::FenceSync(GLenum condition, GLbitfield flags)

{

    const FuncScope funcScope(*this, "fenceSync");

    if (IsContextLost())

        return nullptr;

    if (condition != LOCAL_GL_SYNC_GPU_COMMANDS_COMPLETE) {

        ErrorInvalidEnum("condition must be SYNC_GPU_COMMANDS_COMPLETE");

        return nullptr;

    }

    if (flags != 0) {

        ErrorInvalidValue("flags must be 0");

        return nullptr;

    }

    RefPtr<WebGLSync> globj = new WebGLSync(this, condition, flags);

    const auto& availRunnable = EnsureAvailabilityRunnable();

    availRunnable->mSyncs.push_back(globj);

    return globj.forget();

}

bool

WebGL2Context::IsSync(const WebGLSync* const sync)

{

    const FuncScope funcScope(*this, "isSync");

    return ValidateIsObject(sync);

}

void

WebGL2Context::DeleteSync(WebGLSync* sync)

{

    const FuncScope funcScope(*this, "deleteSync");

    if (!ValidateDeleteObject(sync))

        return;

    sync->RequestDelete();

}

GLenum

WebGL2Context::ClientWaitSync(const WebGLSync& sync, GLbitfield flags, GLuint64 timeout)

{

    const FuncScope funcScope(*this, "clientWaitSync");

    if (IsContextLost())

        return LOCAL_GL_WAIT_FAILED;

    if (!ValidateObject("sync", sync))

        return LOCAL_GL_WAIT_FAILED;

    if (flags != 0 && flags != LOCAL_GL_SYNC_FLUSH_COMMANDS_BIT) {

        ErrorInvalidValue("`flags` must be SYNC_FLUSH_COMMANDS_BIT or 0.");

        return LOCAL_GL_WAIT_FAILED;

    }

    if (timeout > kMaxClientWaitSyncTimeoutNS) {

        ErrorInvalidOperation("`timeout` must not exceed %s nanoseconds.",

                              "MAX_CLIENT_WAIT_TIMEOUT_WEBGL");

        return LOCAL_GL_WAIT_FAILED;

    }

    const bool canBeAvailable = (sync.mCanBeAvailable ||

                                 gfxPrefs::WebGLImmediateQueries());

    if (!canBeAvailable) {

        if (timeout) {

            GenerateWarning("Sync object not yet queryable. Please wait for the event"

                            " loop.");

        }

        return LOCAL_GL_WAIT_FAILED;

    }

    const auto ret = gl->fClientWaitSync(sync.mGLName, flags, timeout);

    if (ret == LOCAL_GL_CONDITION_SATISFIED ||

        ret == LOCAL_GL_ALREADY_SIGNALED)

    {

        sync.MarkSignaled();

    }

    return ret;

}

void

WebGL2Context::WaitSync(const WebGLSync& sync, GLbitfield flags, GLint64 timeout)

{

    const FuncScope funcScope(*this, "waitSync");

    if (IsContextLost())

        return;

    if (!ValidateObject("sync", sync))

        return;

    if (flags != 0) {

        ErrorInvalidValue("`flags` must be 0.");

        return;

    }

    if (timeout != -1) {

        ErrorInvalidValue("`timeout` must be TIMEOUT_IGNORED.");

        return;

    }

    gl->fWaitSync(sync.mGLName, flags, LOCAL_GL_TIMEOUT_IGNORED);

}

void

WebGL2Context::GetSyncParameter(JSContext*, const WebGLSync& sync, GLenum pname,

                                JS::MutableHandleValue retval)

{

    const FuncScope funcScope(*this, "getSyncParameter");

    retval.setNull();

    if (IsContextLost())

        return;

    if (!ValidateObject("sync", sync))

        return;

    ////

    const bool canBeAvailable = (sync.mCanBeAvailable ||

                                 gfxPrefs::WebGLImmediateQueries());

    if (!canBeAvailable && pname == LOCAL_GL_SYNC_STATUS) {

        retval.set(JS::Int32Value(LOCAL_GL_UNSIGNALED));

        return;

    }

    GLint result = 0;

    switch (pname) {

    case LOCAL_GL_OBJECT_TYPE:

    case LOCAL_GL_SYNC_STATUS:

    case LOCAL_GL_SYNC_CONDITION:

    case LOCAL_GL_SYNC_FLAGS:

        gl->fGetSynciv(sync.mGLName, pname, 1, nullptr, &result);

        if (pname == LOCAL_GL_SYNC_STATUS &&

            result == LOCAL_GL_SIGNALED)

        {

            sync.MarkSignaled();

        }

        retval.set(JS::Int32Value(result));

        return;

    default:

        ErrorInvalidEnumInfo("pname", pname);

        return;

    }

}

} // namespace mozilla