/*
 * Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include <stdio.h>
#include <X11/X.h>
#include <X11/Xproto.h>
#include "scope.h"
#include "x11.h"
#include "shmscope.h"
#include "extensions.h"

static unsigned char MITSHMRequest, MITSHMError, MITSHMEvent;

static void
mitshm_decode_req(FD fd, const unsigned char *buf)
{
    short Major = IByte(&buf[0]);
    short Minor = IByte(&buf[1]);

    switch (Minor) {
    case 0:
        MitshmQueryVersion(fd, buf);
        ExtendedReplyExpected(fd, Major, Minor);
        break;
    case 1:
        MitshmAttach(fd, buf);
        break;
    case 2:
        MitshmDetach(fd, buf);
        break;
    case 3:
        MitshmPutImage(fd, buf);
        break;
    case 4:
        MitshmGetImage(fd, buf);
        ExtendedReplyExpected(fd, Major, Minor);
        break;
    case 5:
        MitshmCreatePixmap(fd, buf);
        break;
    default:
        break;
    }
}

static void
mitshm_decode_reply(FD fd, const unsigned char *buf, short RequestMinor)
{
    switch (RequestMinor) {
    case 0:
        MitshmQueryVersionReply(fd, buf);
        break;
    case 4:
        MitshmGetImageReply(fd, buf);
        break;
    }
}

static void
mitshm_decode_event(FD fd, const unsigned char *buf)
{
}

static void
mitshm_decode_error(FD fd, const unsigned char *buf)
{
    short error = IByte(&buf[0]) - MITSHMError;

    switch (error) {
    case 0:
        MitshmShmSegError(fd, buf);
        break;
    default:
        break;
    }
}

void
InitializeMITSHM(const unsigned char *buf)
{
    TYPE p;

    MITSHMRequest = (unsigned char) (buf[9]);
    MITSHMEvent = (unsigned char) (buf[10]);
    MITSHMError = (unsigned char) (buf[11]);

    DefineEValue(&TD[REQUEST], (unsigned long) MITSHMRequest, "MitshmRequest");
    DefineEValue(&TD[REPLY], (unsigned long) MITSHMRequest, "MitshmReply");
    DefineEValue(&TD[EVENT], (unsigned long) MITSHMEvent, "MitshmEvent");
    DefineEValue(&TD[ERROR], (unsigned long) MITSHMError, "MitshmError");

    p = DefineType(MITSHMREQUEST, ENUMERATED, "MITSHMREQUEST",
                   (PrintProcType) PrintENUMERATED);
    DefineEValue(p, 0L, "MitshmQueryVersion");
    DefineEValue(p, 1L, "MitshmAttach");
    DefineEValue(p, 2L, "MitshmDetach");
    DefineEValue(p, 3L, "MitshmPutImage");
    DefineEValue(p, 4L, "MitshmGetImage");
    DefineEValue(p, 5L, "MitshmCreatePixmap");

    p = DefineType(MITSHMREPLY, ENUMERATED, "MITSHMREPLY",
                   (PrintProcType) PrintENUMERATED);
    DefineEValue(p, 0L, "QueryVersion");
    DefineEValue(p, 4L, "GetImage");

    p = DefineType(MITSHMEVENT, ENUMERATED, "MITSHMEVENT",
                   (PrintProcType) PrintENUMERATED);
    DefineEValue(p, 0L, "CompletionEvent");

    InitializeExtensionDecoder(MITSHMRequest, mitshm_decode_req,
                               mitshm_decode_reply);
    InitializeExtensionErrorDecoder(MITSHMError, mitshm_decode_error);
    InitializeExtensionEventDecoder(MITSHMEvent, mitshm_decode_event);
}