/*
   Copyright (c) 2002  XFree86 Inc
*/

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include <stdio.h>
#include <string.h>
#include <X11/X.h>
#include <X11/Xproto.h>
#include "misc.h"
#include "os.h"
#include "dixstruct.h"
#include "extnsionst.h"
#include "swaprep.h"
#include "registry.h"
#include <X11/extensions/XResproto.h>
#include "pixmapstr.h"
#include "windowstr.h"
#include "gcstruct.h"
#include "modinit.h"
#include "protocol-versions.h"

static int
ProcXResQueryVersion(ClientPtr client)
{
    REQUEST(xXResQueryVersionReq);
    xXResQueryVersionReply rep;

    REQUEST_SIZE_MATCH(xXResQueryVersionReq);

    rep.type = X_Reply;
    rep.length = 0;
    rep.sequenceNumber = client->sequence;
    rep.server_major = SERVER_XRES_MAJOR_VERSION;
    rep.server_minor = SERVER_XRES_MINOR_VERSION;
    if (client->swapped) {
        swaps(&rep.sequenceNumber);
        swapl(&rep.length);
        swaps(&rep.server_major);
        swaps(&rep.server_minor);
    }
    WriteToClient(client, sizeof(xXResQueryVersionReply), (char *) &rep);
    return Success;
}

static int
ProcXResQueryClients(ClientPtr client)
{
    /* REQUEST(xXResQueryClientsReq); */
    xXResQueryClientsReply rep;
    int *current_clients;
    int i, num_clients;

    REQUEST_SIZE_MATCH(xXResQueryClientsReq);

    current_clients = malloc(currentMaxClients * sizeof(int));

    num_clients = 0;
    for (i = 0; i < currentMaxClients; i++) {
        if (clients[i]) {
            current_clients[num_clients] = i;
            num_clients++;
        }
    }

    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.num_clients = num_clients;
    rep.length = bytes_to_int32(rep.num_clients * sz_xXResClient);
    if (client->swapped) {
        swaps(&rep.sequenceNumber);
        swapl(&rep.length);
        swapl(&rep.num_clients);
    }
    WriteToClient(client, sizeof(xXResQueryClientsReply), (char *) &rep);

    if (num_clients) {
        xXResClient scratch;

        for (i = 0; i < num_clients; i++) {
            scratch.resource_base = clients[current_clients[i]]->clientAsMask;
            scratch.resource_mask = RESOURCE_ID_MASK;

            if (client->swapped) {
                swapl(&scratch.resource_base);
                swapl(&scratch.resource_mask);
            }
            WriteToClient(client, sz_xXResClient, (char *) &scratch);
        }
    }

    free(current_clients);

    return Success;
}

static void
ResFindAllRes(pointer value, XID id, RESTYPE type, pointer cdata)
{
    int *counts = (int *) cdata;

    counts[(type & TypeMask) - 1]++;
}

static int
ProcXResQueryClientResources(ClientPtr client)
{
    REQUEST(xXResQueryClientResourcesReq);
    xXResQueryClientResourcesReply rep;
    int i, clientID, num_types;
    int *counts;

    REQUEST_SIZE_MATCH(xXResQueryClientResourcesReq);

    clientID = CLIENT_ID(stuff->xid);

    if ((clientID >= currentMaxClients) || !clients[clientID]) {
        client->errorValue = stuff->xid;
        return BadValue;
    }

    counts = calloc(lastResourceType + 1, sizeof(int));

    FindAllClientResources(clients[clientID], ResFindAllRes, counts);

    num_types = 0;

    for (i = 0; i <= lastResourceType; i++) {
        if (counts[i])
            num_types++;
    }

    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.num_types = num_types;
    rep.length = bytes_to_int32(rep.num_types * sz_xXResType);
    if (client->swapped) {
        swaps(&rep.sequenceNumber);
        swapl(&rep.length);
        swapl(&rep.num_types);
    }

    WriteToClient(client, sizeof(xXResQueryClientResourcesReply),
                  (char *) &rep);

    if (num_types) {
        xXResType scratch;
        const char *name;

        for (i = 0; i < lastResourceType; i++) {
            if (!counts[i])
                continue;

            name = LookupResourceName(i + 1);
            if (strcmp(name, XREGISTRY_UNKNOWN))
                scratch.resource_type = MakeAtom(name, strlen(name), TRUE);
            else {
                char buf[40];

                snprintf(buf, sizeof(buf), "Unregistered resource %i", i + 1);
                scratch.resource_type = MakeAtom(buf, strlen(buf), TRUE);
            }

            scratch.count = counts[i];

            if (client->swapped) {
                swapl(&scratch.resource_type);
                swapl(&scratch.count);
            }
            WriteToClient(client, sz_xXResType, (char *) &scratch);
        }
    }

    free(counts);

    return Success;
}

static unsigned long
ResGetApproxPixmapBytes(PixmapPtr pix)
{
    unsigned long nPixels;
    int bytesPerPixel;

    bytesPerPixel = pix->drawable.bitsPerPixel >> 3;
    nPixels = pix->drawable.width * pix->drawable.height;

    /* Divide by refcnt as pixmap could be shared between clients,  
     * so total pixmap mem is shared between these. 
     */
    return (nPixels * bytesPerPixel) / pix->refcnt;
}

static void
ResFindPixmaps(pointer value, XID id, pointer cdata)
{
    unsigned long *bytes = (unsigned long *) cdata;
    PixmapPtr pix = (PixmapPtr) value;

    *bytes += ResGetApproxPixmapBytes(pix);
}

static void
ResFindWindowPixmaps(pointer value, XID id, pointer cdata)
{
    unsigned long *bytes = (unsigned long *) cdata;
    WindowPtr pWin = (WindowPtr) value;

    if (pWin->backgroundState == BackgroundPixmap)
        *bytes += ResGetApproxPixmapBytes(pWin->background.pixmap);

    if (pWin->border.pixmap != NULL && !pWin->borderIsPixel)
        *bytes += ResGetApproxPixmapBytes(pWin->border.pixmap);
}

static void
ResFindGCPixmaps(pointer value, XID id, pointer cdata)
{
    unsigned long *bytes = (unsigned long *) cdata;
    GCPtr pGC = (GCPtr) value;

    if (pGC->stipple != NULL)
        *bytes += ResGetApproxPixmapBytes(pGC->stipple);

    if (pGC->tile.pixmap != NULL && !pGC->tileIsPixel)
        *bytes += ResGetApproxPixmapBytes(pGC->tile.pixmap);
}

static int
ProcXResQueryClientPixmapBytes(ClientPtr client)
{
    REQUEST(xXResQueryClientPixmapBytesReq);
    xXResQueryClientPixmapBytesReply rep;
    int clientID;
    unsigned long bytes;

    REQUEST_SIZE_MATCH(xXResQueryClientPixmapBytesReq);

    clientID = CLIENT_ID(stuff->xid);

    if ((clientID >= currentMaxClients) || !clients[clientID]) {
        client->errorValue = stuff->xid;
        return BadValue;
    }

    bytes = 0;

    FindClientResourcesByType(clients[clientID], RT_PIXMAP, ResFindPixmaps,
                              (pointer) (&bytes));

    /* 
     * Make sure win background pixmaps also held to account. 
     */
    FindClientResourcesByType(clients[clientID], RT_WINDOW,
                              ResFindWindowPixmaps, (pointer) (&bytes));

    /* 
     * GC Tile & Stipple pixmaps too.
     */
    FindClientResourcesByType(clients[clientID], RT_GC,
                              ResFindGCPixmaps, (pointer) (&bytes));

#ifdef COMPOSITE
    /* FIXME: include composite pixmaps too */
#endif

    rep.type = X_Reply;
    rep.sequenceNumber = client->sequence;
    rep.length = 0;
    rep.bytes = bytes;
#ifdef _XSERVER64
    rep.bytes_overflow = bytes >> 32;
#else
    rep.bytes_overflow = 0;
#endif
    if (client->swapped) {
        swaps(&rep.sequenceNumber);
        swapl(&rep.length);
        swapl(&rep.bytes);
        swapl(&rep.bytes_overflow);
    }
    WriteToClient(client, sizeof(xXResQueryClientPixmapBytesReply),
                  (char *) &rep);

    return Success;
}

static int
ProcResDispatch(ClientPtr client)
{
    REQUEST(xReq);
    switch (stuff->data) {
    case X_XResQueryVersion:
        return ProcXResQueryVersion(client);
    case X_XResQueryClients:
        return ProcXResQueryClients(client);
    case X_XResQueryClientResources:
        return ProcXResQueryClientResources(client);
    case X_XResQueryClientPixmapBytes:
        return ProcXResQueryClientPixmapBytes(client);
    default:
        break;
    }

    return BadRequest;
}

static int
SProcXResQueryVersion(ClientPtr client)
{
    REQUEST(xXResQueryVersionReq);
    REQUEST_SIZE_MATCH(xXResQueryVersionReq);
    return ProcXResQueryVersion(client);
}

static int
SProcXResQueryClientResources(ClientPtr client)
{
    REQUEST(xXResQueryClientResourcesReq);
    REQUEST_SIZE_MATCH(xXResQueryClientResourcesReq);
    swapl(&stuff->xid);
    return ProcXResQueryClientResources(client);
}

static int
SProcXResQueryClientPixmapBytes(ClientPtr client)
{
    REQUEST(xXResQueryClientPixmapBytesReq);
    REQUEST_SIZE_MATCH(xXResQueryClientPixmapBytesReq);
    swapl(&stuff->xid);
    return ProcXResQueryClientPixmapBytes(client);
}

static int
SProcResDispatch(ClientPtr client)
{
    REQUEST(xReq);
    swaps(&stuff->length);

    switch (stuff->data) {
    case X_XResQueryVersion:
        return SProcXResQueryVersion(client);
    case X_XResQueryClients:   /* nothing to swap */
        return ProcXResQueryClients(client);
    case X_XResQueryClientResources:
        return SProcXResQueryClientResources(client);
    case X_XResQueryClientPixmapBytes:
        return SProcXResQueryClientPixmapBytes(client);
    default:
        break;
    }

    return BadRequest;
}

void
ResExtensionInit(INITARGS)
{
    (void) AddExtension(XRES_NAME, 0, 0,
                        ProcResDispatch, SProcResDispatch,
                        NULL, StandardMinorOpcode);
}