trunk/rdesktop/xwin.c

/* -*- c-basic-offset: 8 -*-
   rdesktop: A Remote Desktop Protocol client.
   User interface services - X Window System
   Copyright (C) Matthew Chapman 1999-2002

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <unistd.h>
#include <sys/time.h>
#include <time.h>
#include <errno.h>
#include <strings.h>
#include "rdesktop.h"
#include "xproto.h"

extern int g_width;
extern int g_height;
extern int g_xpos;
extern int g_ypos;
extern BOOL g_sendmotion;
extern BOOL g_fullscreen;
extern BOOL g_grab_keyboard;
extern BOOL g_hide_decorations;
extern char g_title[];
extern int g_server_bpp;
extern int g_win_button_size;

Display *g_display;
Time g_last_gesturetime;
static int g_x_socket;
static Screen *g_screen;
Window g_wnd;
extern uint32 g_embed_wnd;
BOOL g_enable_compose = False;
BOOL g_Unobscured;              /* used for screenblt */
static GC g_gc = NULL;
static GC g_create_bitmap_gc = NULL;
static GC g_create_glyph_gc = NULL;
static Visual *g_visual;
static int g_depth;
static int g_bpp;
static XIM g_IM;
static XIC g_IC;
static XModifierKeymap *g_mod_map;
static Cursor g_current_cursor;
static HCURSOR g_null_cursor = NULL;
static Atom g_protocol_atom, g_kill_atom;
static BOOL g_focused;
static BOOL g_mouse_in_wnd;
static BOOL g_arch_match = False;       /* set to True if RGB XServer and little endian */

/* endianness */
static BOOL g_host_be;
static BOOL g_xserver_be;
static int g_red_shift_r, g_blue_shift_r, g_green_shift_r;
static int g_red_shift_l, g_blue_shift_l, g_green_shift_l;

/* software backing store */
extern BOOL g_ownbackstore;
static Pixmap g_backstore = 0;

/* Moving in single app mode */
static BOOL g_moving_wnd;
static int g_move_x_offset = 0;
static int g_move_y_offset = 0;

#ifdef WITH_RDPSND
extern int g_dsp_fd;
extern BOOL g_dsp_busy;
extern BOOL g_rdpsnd;
#endif

/* MWM decorations */
#define MWM_HINTS_DECORATIONS   (1L << 1)
#define PROP_MOTIF_WM_HINTS_ELEMENTS    5
typedef struct
{
        uint32 flags;
        uint32 functions;
        uint32 decorations;
        sint32 inputMode;
        uint32 status;
}
PropMotifWmHints;

typedef struct
{
        uint32 red;
        uint32 green;
        uint32 blue;
}
PixelColour;


#define FILL_RECTANGLE(x,y,cx,cy)\
{ \
        XFillRectangle(g_display, g_wnd, g_gc, x, y, cx, cy); \
        if (g_ownbackstore) \
                XFillRectangle(g_display, g_backstore, g_gc, x, y, cx, cy); \
}

#define FILL_RECTANGLE_BACKSTORE(x,y,cx,cy)\
{ \
        XFillRectangle(g_display, g_ownbackstore ? g_backstore : g_wnd, g_gc, x, y, cx, cy); \
}

/* colour maps */
extern BOOL g_owncolmap;
static Colormap g_xcolmap;
static uint32 *g_colmap = NULL;

#define TRANSLATE(col)          ( g_server_bpp != 8 ? translate_colour(col) : g_owncolmap ? col : g_colmap[col] )
#define SET_FOREGROUND(col)     XSetForeground(g_display, g_gc, TRANSLATE(col));
#define SET_BACKGROUND(col)     XSetBackground(g_display, g_gc, TRANSLATE(col));

static int rop2_map[] = {
        GXclear,                /* 0 */
        GXnor,                  /* DPon */
        GXandInverted,          /* DPna */
        GXcopyInverted,         /* Pn */
        GXandReverse,           /* PDna */
        GXinvert,               /* Dn */
        GXxor,                  /* DPx */
        GXnand,                 /* DPan */
        GXand,                  /* DPa */
        GXequiv,                /* DPxn */
        GXnoop,                 /* D */
        GXorInverted,           /* DPno */
        GXcopy,                 /* P */
        GXorReverse,            /* PDno */
        GXor,                   /* DPo */
        GXset                   /* 1 */
};

#define SET_FUNCTION(rop2)      { if (rop2 != ROP2_COPY) XSetFunction(g_display, g_gc, rop2_map[rop2]); }
#define RESET_FUNCTION(rop2)    { if (rop2 != ROP2_COPY) XSetFunction(g_display, g_gc, GXcopy); }

static void
mwm_hide_decorations(void)
{
        PropMotifWmHints motif_hints;
        Atom hintsatom;

        /* setup the property */
        motif_hints.flags = MWM_HINTS_DECORATIONS;
        motif_hints.decorations = 0;

        /* get the atom for the property */
        hintsatom = XInternAtom(g_display, "_MOTIF_WM_HINTS", False);
        if (!hintsatom)
        {
                warning("Failed to get atom _MOTIF_WM_HINTS: probably your window manager does not support MWM hints\n");
                return;
        }

        XChangeProperty(g_display, g_wnd, hintsatom, hintsatom, 32, PropModeReplace,
                        (unsigned char *) &motif_hints, PROP_MOTIF_WM_HINTS_ELEMENTS);
}

#define SPLITCOLOUR15(colour, rv) \
{ \
        rv.red = ((colour >> 7) & 0xf8) | ((colour >> 12) & 0x7); \
        rv.green = ((colour >> 2) & 0xf8) | ((colour >> 8) & 0x7); \
        rv.blue = ((colour << 3) & 0xf8) | ((colour >> 2) & 0x7); \
}

#define SPLITCOLOUR16(colour, rv) \
{ \
        rv.red = ((colour >> 8) & 0xf8) | ((colour >> 13) & 0x7); \
        rv.green = ((colour >> 3) & 0xfc) | ((colour >> 9) & 0x3); \
        rv.blue = ((colour << 3) & 0xf8) | ((colour >> 2) & 0x7); \
} \

#define SPLITCOLOUR24(colour, rv) \
{ \
        rv.blue = (colour & 0xff0000) >> 16; \
        rv.green = (colour & 0x00ff00) >> 8; \
        rv.red = (colour & 0x0000ff); \
}

#define MAKECOLOUR(pc) \
        ((pc.red >> g_red_shift_r) << g_red_shift_l) \
                | ((pc.green >> g_green_shift_r) << g_green_shift_l) \
                | ((pc.blue >> g_blue_shift_r) << g_blue_shift_l) \

#define BSWAP16(x) { x = (((x & 0xff) << 8) | (x >> 8)); }
#define BSWAP24(x) { x = (((x & 0xff) << 16) | (x >> 16) | (x & 0xff00)); }
#define BSWAP32(x) { x = (((x & 0xff00ff) << 8) | ((x >> 8) & 0xff00ff)); \
                        x = (x << 16) | (x >> 16); }

#define BOUT16(o, x) { *(o++) = x >> 8; *(o++) = x; }
#define BOUT24(o, x) { *(o++) = x >> 16; *(o++) = x >> 8; *(o++) = x; }
#define BOUT32(o, x) { *(o++) = x >> 24; *(o++) = x >> 16; *(o++) = x >> 8; *(o++) = x; }
#define LOUT16(o, x) { *(o++) = x; *(o++) = x >> 8; }
#define LOUT24(o, x) { *(o++) = x; *(o++) = x >> 8; *(o++) = x >> 16; }
#define LOUT32(o, x) { *(o++) = x; *(o++) = x >> 8; *(o++) = x >> 16; *(o++) = x >> 24; }

static uint32
translate_colour(uint32 colour)
{
        PixelColour pc;
        switch (g_server_bpp)
        {
                case 15:
                        SPLITCOLOUR15(colour, pc);
                        break;
                case 16:
                        SPLITCOLOUR16(colour, pc);
                        break;
                case 24:
                        SPLITCOLOUR24(colour, pc);
                        break;
        }
        return MAKECOLOUR(pc);
}

/* indent is confused by UNROLL8 */
/* *INDENT-OFF* */

/* repeat and unroll, similar to bitmap.c */
/* potentialy any of the following translate */
/* functions can use repeat but just doing */
/* the most common ones */

#define UNROLL8(stm) { stm stm stm stm stm stm stm stm }
/* 2 byte output repeat */
#define REPEAT2(stm) \
{ \
        while (out <= end - 8 * 2) \
                UNROLL8(stm) \
        while (out < end) \
                { stm } \
}
/* 3 byte output repeat */
#define REPEAT3(stm) \
{ \
        while (out <= end - 8 * 3) \
                UNROLL8(stm) \
        while (out < end) \
                { stm } \
}
/* 4 byte output repeat */
#define REPEAT4(stm) \
{ \
        while (out <= end - 8 * 4) \
                UNROLL8(stm) \
        while (out < end) \
                { stm } \
}
/* *INDENT-ON* */

static void
translate8to8(const uint8 * data, uint8 * out, uint8 * end)
{
        while (out < end)
                *(out++) = (uint8) g_colmap[*(data++)];
}

static void
translate8to16(const uint8 * data, uint8 * out, uint8 * end)
{
        uint16 value;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT2
                (
                        *((uint16 *) out) = g_colmap[*(data++)];
                        out += 2;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                while (out < end)
                {
                        value = (uint16) g_colmap[*(data++)];
                        BOUT16(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        value = (uint16) g_colmap[*(data++)];
                        LOUT16(out, value);
                }
        }
}

/* little endian - conversion happens when colourmap is built */
static void
translate8to24(const uint8 * data, uint8 * out, uint8 * end)
{
        uint32 value;

        if (g_xserver_be)
        {
                while (out < end)
                {
                        value = g_colmap[*(data++)];
                        BOUT24(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        value = g_colmap[*(data++)];
                        LOUT24(out, value);
                }
        }
}

static void
translate8to32(const uint8 * data, uint8 * out, uint8 * end)
{
        uint32 value;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT4
                (
                        *((uint32 *) out) = g_colmap[*(data++)];
                        out += 4;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                while (out < end)
                {
                        value = g_colmap[*(data++)];
                        BOUT32(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        value = g_colmap[*(data++)];
                        LOUT32(out, value);
                }
        }
}

static void
translate15to16(const uint16 * data, uint8 * out, uint8 * end)
{
        uint16 pixel;
        uint16 value;
        PixelColour pc;

        if (g_xserver_be)
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        BOUT16(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        LOUT16(out, value);
                }
        }
}

static void
translate15to24(const uint16 * data, uint8 * out, uint8 * end)
{
        uint32 value;
        uint16 pixel;
        PixelColour pc;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT3
                (
                        pixel = *(data++);
                        SPLITCOLOUR15(pixel, pc);
                        *(out++) = pc.blue;
                        *(out++) = pc.green;
                        *(out++) = pc.red;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        BOUT24(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        LOUT24(out, value);
                }
        }
}

static void
translate15to32(const uint16 * data, uint8 * out, uint8 * end)
{
        uint16 pixel;
        uint32 value;
        PixelColour pc;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT4
                (
                        pixel = *(data++);
                        SPLITCOLOUR15(pixel, pc);
                        *(out++) = pc.blue;
                        *(out++) = pc.green;
                        *(out++) = pc.red;
                        *(out++) = 0;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        BOUT32(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        pixel = *(data++);
                        if (g_host_be)
                        {
                                BSWAP16(pixel);
                        }
                        SPLITCOLOUR15(pixel, pc);
                        value = MAKECOLOUR(pc);
                        LOUT32(out, value);
                }
        }
}

static void
translate16to16(const uint16 * data, uint8 * out, uint8 * end)
{
        uint16 pixel;
        uint16 value;
        PixelColour pc;

        if (g_xserver_be)
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT16(out, value);
                        }
                }
                else
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT16(out, value);
                        }
                }
        }
        else
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT16(out, value);
                        }
                }
                else
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT16(out, value);
                        }
                }
        }
}

static void
translate16to24(const uint16 * data, uint8 * out, uint8 * end)
{
        uint32 value;
        uint16 pixel;
        PixelColour pc;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT3
                (
                        pixel = *(data++);
                        SPLITCOLOUR16(pixel, pc);
                        *(out++) = pc.blue;
                        *(out++) = pc.green;
                        *(out++) = pc.red;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT24(out, value);
                        }
                }
                else
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT24(out, value);
                        }
                }
        }
        else
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT24(out, value);
                        }
                }
                else
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT24(out, value);
                        }
                }
        }
}

static void
translate16to32(const uint16 * data, uint8 * out, uint8 * end)
{
        uint16 pixel;
        uint32 value;
        PixelColour pc;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT4
                (
                        pixel = *(data++);
                        SPLITCOLOUR16(pixel, pc);
                        *(out++) = pc.blue;
                        *(out++) = pc.green;
                        *(out++) = pc.red;
                        *(out++) = 0;
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT32(out, value);
                        }
                }
                else
                {
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                BOUT32(out, value);
                        }
                }
        }
        else
        {
                if (g_host_be)
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                BSWAP16(pixel);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT32(out, value);
                        }
                }
                else
                {
                        while (out < end)
                        {
                                pixel = *(data++);
                                SPLITCOLOUR16(pixel, pc);
                                value = MAKECOLOUR(pc);
                                LOUT32(out, value);
                        }
                }
        }
}

static void
translate24to16(const uint8 * data, uint8 * out, uint8 * end)
{
        uint32 pixel = 0;
        uint16 value;
        PixelColour pc;

        while (out < end)
        {
                pixel = *(data++) << 16;
                pixel |= *(data++) << 8;
                pixel |= *(data++);
                SPLITCOLOUR24(pixel, pc);
                value = MAKECOLOUR(pc);
                if (g_xserver_be)
                {
                        BOUT16(out, value);
                }
                else
                {
                        LOUT16(out, value);
                }
        }
}

static void
translate24to24(const uint8 * data, uint8 * out, uint8 * end)
{
        uint32 pixel;
        uint32 value;
        PixelColour pc;

        if (g_xserver_be)
        {
                while (out < end)
                {
                        pixel = *(data++) << 16;
                        pixel |= *(data++) << 8;
                        pixel |= *(data++);
                        SPLITCOLOUR24(pixel, pc);
                        value = MAKECOLOUR(pc);
                        BOUT24(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        pixel = *(data++) << 16;
                        pixel |= *(data++) << 8;
                        pixel |= *(data++);
                        SPLITCOLOUR24(pixel, pc);
                        value = MAKECOLOUR(pc);
                        LOUT24(out, value);
                }
        }
}

static void
translate24to32(const uint8 * data, uint8 * out, uint8 * end)
{
        uint32 pixel;
        uint32 value;
        PixelColour pc;

        if (g_arch_match)
        {
                /* *INDENT-OFF* */
                REPEAT4
                (
#ifdef NEED_ALIGN
                        *(out++) = *(data++);
                        *(out++) = *(data++);
                        *(out++) = *(data++);
                        *(out++) = 0;
#else
                        *((uint32 *) out) = *((uint32 *) data);
                        out += 4;
                        data += 3;
#endif
                )
                /* *INDENT-ON* */
        }
        else if (g_xserver_be)
        {
                while (out < end)
                {
                        pixel = *(data++) << 16;
                        pixel |= *(data++) << 8;
                        pixel |= *(data++);
                        SPLITCOLOUR24(pixel, pc);
                        value = MAKECOLOUR(pc);
                        BOUT32(out, value);
                }
        }
        else
        {
                while (out < end)
                {
                        pixel = *(data++) << 16;
                        pixel |= *(data++) << 8;
                        pixel |= *(data++);
                        SPLITCOLOUR24(pixel, pc);
                        value = MAKECOLOUR(pc);
                        LOUT32(out, value);
                }
        }
}

static uint8 *
translate_image(int width, int height, uint8 * data)
{
        int size;
        uint8 *out;
        uint8 *end;

        /* if server and xserver bpp match, */
        /* and arch(endian) matches, no need to translate */
        /* just return data */
        if (g_arch_match)
        {
                if (g_depth == 15 && g_server_bpp == 15)
                        return data;
                if (g_depth == 16 && g_server_bpp == 16)
                        return data;
                if (g_depth == 24 && g_bpp == 24 && g_server_bpp == 24)
                        return data;
        }

        size = width * height * (g_bpp / 8);
        out = (uint8 *) xmalloc(size);
        end = out + size;

        switch (g_server_bpp)
        {
                case 24:
                        switch (g_bpp)
                        {
                                case 32:
                                        translate24to32(data, out, end);
                                        break;
                                case 24:
                                        translate24to24(data, out, end);
                                        break;
                                case 16:
                                        translate24to16(data, out, end);
                                        break;
                        }
                        break;
                case 16:
                        switch (g_bpp)
                        {
                                case 32:
                                        translate16to32((uint16 *) data, out, end);
                                        break;
                                case 24:
                                        translate16to24((uint16 *) data, out, end);
                                        break;
                                case 16:
                                        translate16to16((uint16 *) data, out, end);
                                        break;
                        }
                        break;
                case 15:
                        switch (g_bpp)
                        {
                                case 32:
                                        translate15to32((uint16 *) data, out, end);
                                        break;
                                case 24:
                                        translate15to24((uint16 *) data, out, end);
                                        break;
                                case 16:
                                        translate15to16((uint16 *) data, out, end);
                                        break;
                        }
                        break;
                case 8:
                        switch (g_bpp)
                        {
                                case 8:
                                        translate8to8(data, out, end);
                                        break;
                                case 16:
                                        translate8to16(data, out, end);
                                        break;
                                case 24:
                                        translate8to24(data, out, end);
                                        break;
                                case 32:
                                        translate8to32(data, out, end);
                                        break;
                        }
                        break;
        }
        return out;
}

BOOL
get_key_state(unsigned int state, uint32 keysym)
{
        int modifierpos, key, keysymMask = 0;
        int offset;

        KeyCode keycode = XKeysymToKeycode(g_display, keysym);

        if (keycode == NoSymbol)
                return False;

        for (modifierpos = 0; modifierpos < 8; modifierpos++)
        {
                offset = g_mod_map->max_keypermod * modifierpos;

                for (key = 0; key < g_mod_map->max_keypermod; key++)
                {
                        if (g_mod_map->modifiermap[offset + key] == keycode)
                                keysymMask |= 1 << modifierpos;
                }
        }

        return (state & keysymMask) ? True : False;
}

static void
calculate_shifts(uint32 mask, int *shift_r, int *shift_l)
{
        *shift_l = ffs(mask) - 1;
        mask >>= *shift_l;
        *shift_r = 8 - ffs(mask & ~(mask >> 1));
}

BOOL
ui_init(void)
{
        XVisualInfo vi;
        XPixmapFormatValues *pfm;
        uint16 test;
        int i, screen_num, nvisuals;
        XVisualInfo *vmatches = NULL;
        XVisualInfo template;
        Bool TrueColorVisual = False;

        g_display = XOpenDisplay(NULL);
        if (g_display == NULL)
        {
                error("Failed to open display: %s\n", XDisplayName(NULL));
                return False;
        }

        screen_num = DefaultScreen(g_display);
        g_x_socket = ConnectionNumber(g_display);
        g_screen = ScreenOfDisplay(g_display, screen_num);
        g_depth = DefaultDepthOfScreen(g_screen);

        /* Search for best TrueColor depth */
        template.class = TrueColor;
        vmatches = XGetVisualInfo(g_display, VisualClassMask, &template, &nvisuals);

        nvisuals--;
        while (nvisuals >= 0)
        {
                if ((vmatches + nvisuals)->depth > g_depth)
                {
                        g_depth = (vmatches + nvisuals)->depth;
                }
                nvisuals--;
                TrueColorVisual = True;
        }

        test = 1;
        g_host_be = !(BOOL) (*(uint8 *) (&test));
        g_xserver_be = (ImageByteOrder(g_display) == MSBFirst);

        if ((g_server_bpp == 8) && ((!TrueColorVisual) || (g_depth <= 8)))
        {
                /* we use a colourmap, so the default visual should do */
                g_visual = DefaultVisualOfScreen(g_screen);
                g_depth = DefaultDepthOfScreen(g_screen);

                /* Do not allocate colours on a TrueColor visual */
                if (g_visual->class == TrueColor)
                {
                        g_owncolmap = False;
                }
        }
        else
        {
                /* need a truecolour visual */
                if (!XMatchVisualInfo(g_display, screen_num, g_depth, TrueColor, &vi))
                {
                        error("The display does not support true colour - high colour support unavailable.\n");
                        return False;
                }

                g_visual = vi.visual;
                g_owncolmap = False;
                calculate_shifts(vi.red_mask, &g_red_shift_r, &g_red_shift_l);
                calculate_shifts(vi.blue_mask, &g_blue_shift_r, &g_blue_shift_l);
                calculate_shifts(vi.green_mask, &g_green_shift_r, &g_green_shift_l);

                /* if RGB video and everything is little endian */
                if ((vi.red_mask > vi.green_mask && vi.green_mask > vi.blue_mask) &&
                    !g_xserver_be && !g_host_be)
                {
                        if (g_depth <= 16 || (g_red_shift_l == 16 && g_green_shift_l == 8 &&
                                              g_blue_shift_l == 0))
                        {
                                g_arch_match = True;
                        }
                }

                if (g_arch_match)
                {
                        DEBUG(("Architectures match, enabling little endian optimisations.\n"));
                }
        }

        pfm = XListPixmapFormats(g_display, &i);
        if (pfm != NULL)
        {
                /* Use maximum bpp for this depth - this is generally
                   desirable, e.g. 24 bits->32 bits. */
                while (i--)
                {
                        if ((pfm[i].depth == g_depth) && (pfm[i].bits_per_pixel > g_bpp))
                        {
                                g_bpp = pfm[i].bits_per_pixel;
                        }
                }
                XFree(pfm);
        }

        if (g_bpp < 8)
        {
                error("Less than 8 bpp not currently supported.\n");
                XCloseDisplay(g_display);
                return False;
        }

        if (!g_owncolmap)
        {
                g_xcolmap =
                        XCreateColormap(g_display, RootWindowOfScreen(g_screen), g_visual,
                                        AllocNone);
                if (g_depth <= 8)
                        warning("Screen depth is 8 bits or lower: you may want to use -C for a private colourmap\n");
        }

        if ((!g_ownbackstore) && (DoesBackingStore(g_screen) != Always))
        {
                warning("External BackingStore not available, using internal\n");
                g_ownbackstore = True;
        }

        /*
         * Determine desktop size
         */
        if (g_fullscreen)
        {
                g_width = WidthOfScreen(g_screen);
                g_height = HeightOfScreen(g_screen);
        }
        else if (g_width < 0)
        {
                /* Percent of screen */
                g_height = HeightOfScreen(g_screen) * (-g_width) / 100;
                g_width = WidthOfScreen(g_screen) * (-g_width) / 100;
        }
        else if (g_width == 0)
        {
                /* Fetch geometry from _NET_WORKAREA */
                uint32 x, y, cx, cy;

                if (get_current_workarea(&x, &y, &cx, &cy) == 0)
                {
                        g_width = cx;
                        g_height = cy;
                }
                else
                {
                        warning("Failed to get workarea: probably your window manager does not support extended hints\n");
                        g_width = 800;
                        g_height = 600;
                }
        }

        /* make sure width is a multiple of 4 */
        g_width = (g_width + 3) & ~3;

        g_mod_map = XGetModifierMapping(g_display);

        xkeymap_init();

        if (g_enable_compose)
                g_IM = XOpenIM(g_display, NULL, NULL, NULL);

        xclip_init();

        DEBUG_RDP5(("server bpp %d client bpp %d depth %d\n", g_server_bpp, g_bpp, g_depth));

        return True;
}

void
ui_deinit(void)
{
        if (g_IM != NULL)
                XCloseIM(g_IM);

        if (g_null_cursor != NULL)
                ui_destroy_cursor(g_null_cursor);

        XFreeModifiermap(g_mod_map);

        if (g_ownbackstore)
                XFreePixmap(g_display, g_backstore);

        XFreeGC(g_display, g_gc);
        XCloseDisplay(g_display);
        g_display = NULL;
}

BOOL
ui_create_window(void)
{
        uint8 null_pointer_mask[1] = { 0x80 };
        uint8 null_pointer_data[24] = { 0x00 };

        XSetWindowAttributes attribs;
        XClassHint *classhints;
        XSizeHints *sizehints;
        int wndwidth, wndheight;
        long input_mask, ic_input_mask;
        XEvent xevent;

        wndwidth = g_fullscreen ? WidthOfScreen(g_screen) : g_width;
        wndheight = g_fullscreen ? HeightOfScreen(g_screen) : g_height;

        attribs.background_pixel = BlackPixelOfScreen(g_screen);
        attribs.border_pixel = WhitePixelOfScreen(g_screen);
        attribs.backing_store = g_ownbackstore ? NotUseful : Always;
        attribs.override_redirect = g_fullscreen;
        attribs.colormap = g_xcolmap;

        g_wnd = XCreateWindow(g_display, RootWindowOfScreen(g_screen), g_xpos, g_ypos, wndwidth,
                              wndheight, 0, g_depth, InputOutput, g_visual,
                              CWBackPixel | CWBackingStore | CWOverrideRedirect | CWColormap |
                              CWBorderPixel, &attribs);

        if (g_gc == NULL)
                g_gc = XCreateGC(g_display, g_wnd, 0, NULL);

        if (g_create_bitmap_gc == NULL)
                g_create_bitmap_gc = XCreateGC(g_display, g_wnd, 0, NULL);

        if ((g_ownbackstore) && (g_backstore == 0))
        {
                g_backstore = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);

                /* clear to prevent rubbish being exposed at startup */
                XSetForeground(g_display, g_gc, BlackPixelOfScreen(g_screen));
                XFillRectangle(g_display, g_backstore, g_gc, 0, 0, g_width, g_height);
        }

        XStoreName(g_display, g_wnd, g_title);

        if (g_hide_decorations)
                mwm_hide_decorations();

        classhints = XAllocClassHint();
        if (classhints != NULL)
        {
                classhints->res_name = classhints->res_class = "rdesktop";
                XSetClassHint(g_display, g_wnd, classhints);
                XFree(classhints);
        }

        sizehints = XAllocSizeHints();
        if (sizehints)
        {
                sizehints->flags = PMinSize | PMaxSize;
                sizehints->min_width = sizehints->max_width = g_width;
                sizehints->min_height = sizehints->max_height = g_height;
                XSetWMNormalHints(g_display, g_wnd, sizehints);
                XFree(sizehints);
        }

        if (g_embed_wnd)
        {
                XReparentWindow(g_display, g_wnd, (Window) g_embed_wnd, 0, 0);
        }

        input_mask = KeyPressMask | KeyReleaseMask | ButtonPressMask | ButtonReleaseMask |
                VisibilityChangeMask | FocusChangeMask;

        if (g_sendmotion)
                input_mask |= PointerMotionMask;
        if (g_ownbackstore)
                input_mask |= ExposureMask;
        if (g_fullscreen || g_grab_keyboard)
                input_mask |= EnterWindowMask;
        if (g_grab_keyboard)
                input_mask |= LeaveWindowMask;

        if (g_IM != NULL)
        {
                g_IC = XCreateIC(g_IM, XNInputStyle, (XIMPreeditNothing | XIMStatusNothing),
                                 XNClientWindow, g_wnd, XNFocusWindow, g_wnd, NULL);

                if ((g_IC != NULL)
                    && (XGetICValues(g_IC, XNFilterEvents, &ic_input_mask, NULL) == NULL))
                        input_mask |= ic_input_mask;
        }

        XSelectInput(g_display, g_wnd, input_mask);
        XMapWindow(g_display, g_wnd);

        /* wait for VisibilityNotify */
        do
        {
                XMaskEvent(g_display, VisibilityChangeMask, &xevent);
        }
        while (xevent.type != VisibilityNotify);
        g_Unobscured = xevent.xvisibility.state == VisibilityUnobscured;

        g_focused = False;
        g_mouse_in_wnd = False;

        /* handle the WM_DELETE_WINDOW protocol */
        g_protocol_atom = XInternAtom(g_display, "WM_PROTOCOLS", True);
        g_kill_atom = XInternAtom(g_display, "WM_DELETE_WINDOW", True);
        XSetWMProtocols(g_display, g_wnd, &g_kill_atom, 1);

        /* create invisible 1x1 cursor to be used as null cursor */
        if (g_null_cursor == NULL)
                g_null_cursor = ui_create_cursor(0, 0, 1, 1, null_pointer_mask, null_pointer_data);

        return True;
}

void
ui_resize_window()
{
        XSizeHints *sizehints;
        Pixmap bs;

        sizehints = XAllocSizeHints();
        if (sizehints)
        {
                sizehints->flags = PMinSize | PMaxSize;
                sizehints->min_width = sizehints->max_width = g_width;
                sizehints->min_height = sizehints->max_height = g_height;
                XSetWMNormalHints(g_display, g_wnd, sizehints);
                XFree(sizehints);
        }

        if (!(g_fullscreen || g_embed_wnd))
        {
                XResizeWindow(g_display, g_wnd, g_width, g_height);
        }

        /* create new backstore pixmap */
        if (g_backstore != 0)
        {
                bs = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);
                XSetForeground(g_display, g_gc, BlackPixelOfScreen(g_screen));
                XFillRectangle(g_display, bs, g_gc, 0, 0, g_width, g_height);
                XCopyArea(g_display, g_backstore, bs, g_gc, 0, 0, g_width, g_height, 0, 0);
                XFreePixmap(g_display, g_backstore);
                g_backstore = bs;
        }
}

void
ui_destroy_window(void)
{
        if (g_IC != NULL)
                XDestroyIC(g_IC);

        XDestroyWindow(g_display, g_wnd);
}

void
xwin_toggle_fullscreen(void)
{
        Pixmap contents = 0;

        if (!g_ownbackstore)
        {
                /* need to save contents of window */
                contents = XCreatePixmap(g_display, g_wnd, g_width, g_height, g_depth);
                XCopyArea(g_display, g_wnd, contents, g_gc, 0, 0, g_width, g_height, 0, 0);
        }

        ui_destroy_window();
        g_fullscreen = !g_fullscreen;
        ui_create_window();

        XDefineCursor(g_display, g_wnd, g_current_cursor);

        if (!g_ownbackstore)
        {
                XCopyArea(g_display, contents, g_wnd, g_gc, 0, 0, g_width, g_height, 0, 0);
                XFreePixmap(g_display, contents);
        }
}

/* Process all events in Xlib queue
   Returns 0 after user quit, 1 otherwise */
static int
xwin_process_events(void)
{
        XEvent xevent;
        KeySym keysym;
        uint16 button, flags;
        uint32 ev_time;
        key_translation tr;
        char str[256];
        Status status;

        while (XPending(g_display) > 0)
        {
                XNextEvent(g_display, &xevent);

                if ((g_IC != NULL) && (XFilterEvent(&xevent, None) == True))
                {
                        DEBUG_KBD(("Filtering event\n"));
                        continue;
                }

                flags = 0;

                switch (xevent.type)
                {
                        case VisibilityNotify:
                                g_Unobscured = xevent.xvisibility.state == VisibilityUnobscured;
                                break;
                        case ClientMessage:
                                /* the window manager told us to quit */
                                if ((xevent.xclient.message_type == g_protocol_atom)
                                    && ((Atom) xevent.xclient.data.l[0] == g_kill_atom))
                                        /* Quit */
                                        return 0;
                                break;

                        case KeyPress:
                                g_last_gesturetime = xevent.xkey.time;
                                if (g_IC != NULL)
                                        /* Multi_key compatible version */
                                {
                                        XmbLookupString(g_IC,
                                                        &xevent.xkey, str, sizeof(str), &keysym,
                                                        &status);
                                        if (!((status == XLookupKeySym) || (status == XLookupBoth)))
                                        {
                                                error("XmbLookupString failed with status 0x%x\n",
                                                      status);
                                                break;
                                        }
                                }
                                else
                                {
                                        /* Plain old XLookupString */
                                        DEBUG_KBD(("\nNo input context, using XLookupString\n"));
                                        XLookupString((XKeyEvent *) & xevent,
                                                      str, sizeof(str), &keysym, NULL);
                                }

                                DEBUG_KBD(("KeyPress for (keysym 0x%lx, %s)\n", keysym,
                                           get_ksname(keysym)));

                                ev_time = time(NULL);
                                if (handle_special_keys(keysym, xevent.xkey.state, ev_time, True))
                                        break;

                                tr = xkeymap_translate_key(keysym,
                                                           xevent.xkey.keycode, xevent.xkey.state);

                                if (tr.scancode == 0)
                                        break;

                                save_remote_modifiers(tr.scancode);
                                ensure_remote_modifiers(ev_time, tr);
                                rdp_send_scancode(ev_time, RDP_KEYPRESS, tr.scancode);
                                restore_remote_modifiers(ev_time, tr.scancode);

                                break;

                        case KeyRelease:
                                g_last_gesturetime = xevent.xkey.time;
                                XLookupString((XKeyEvent *) & xevent, str,
                                              sizeof(str), &keysym, NULL);

                                DEBUG_KBD(("\nKeyRelease for (keysym 0x%lx, %s)\n", keysym,
                                           get_ksname(keysym)));

                                ev_time = time(NULL);
                                if (handle_special_keys(keysym, xevent.xkey.state, ev_time, False))
                                        break;

                                tr = xkeymap_translate_key(keysym,
                                                           xevent.xkey.keycode, xevent.xkey.state);

                                if (tr.scancode == 0)
                                        break;

                                rdp_send_scancode(ev_time, RDP_KEYRELEASE, tr.scancode);
                                break;

                        case ButtonPress:
                                flags = MOUSE_FLAG_DOWN;
                                /* fall through */

                        case ButtonRelease:
                                g_last_gesturetime = xevent.xbutton.time;
                                button = xkeymap_translate_button(xevent.xbutton.button);
                                if (button == 0)
                                        break;

                                /* If win_button_size is nonzero, enable single app mode */
                                if (xevent.xbutton.y < g_win_button_size)
                                {
                                        /* Stop moving window when button is released, regardless of cursor position */
                                        if (g_moving_wnd && (xevent.type == ButtonRelease))
                                                g_moving_wnd = False;

                                        /*  Check from right to left: */

                                        if (xevent.xbutton.x >= g_width - g_win_button_size)
                                        {
                                                /* The close button, continue */
                                                ;
                                        }
                                        else if (xevent.xbutton.x >=
                                                 g_width - g_win_button_size * 2)
                                        {
                                                /* The maximize/restore button. Do not send to
                                                   server.  It might be a good idea to change the
                                                   cursor or give some other visible indication
                                                   that rdesktop inhibited this click */
                                                break;
                                        }
                                        else if (xevent.xbutton.x >=
                                                 g_width - g_win_button_size * 3)
                                        {
                                                /* The minimize button. Iconify window. */
                                                XIconifyWindow(g_display, g_wnd,
                                                               DefaultScreen(g_display));
                                                break;
                                        }
                                        else if (xevent.xbutton.x <= g_win_button_size)
                                        {
                                                /* The system menu. Ignore. */
                                                break;
                                        }
                                        else
                                        {
                                                /* The title bar. */
                                                if ((xevent.type == ButtonPress) && !g_fullscreen
                                                    && g_hide_decorations)
                                                {
                                                        g_moving_wnd = True;
                                                        g_move_x_offset = xevent.xbutton.x;
                                                        g_move_y_offset = xevent.xbutton.y;
                                                }
                                                break;

                                        }
                                }

                                rdp_send_input(time(NULL), RDP_INPUT_MOUSE,
                                               flags | button, xevent.xbutton.x, xevent.xbutton.y);
                                break;

                        case MotionNotify:
                                if (g_moving_wnd)
                                {
                                        XMoveWindow(g_display, g_wnd,
                                                    xevent.xmotion.x_root - g_move_x_offset,
                                                    xevent.xmotion.y_root - g_move_y_offset);
                                        break;
                                }

                                if (g_fullscreen && !g_focused)
                                        XSetInputFocus(g_display, g_wnd, RevertToPointerRoot,
                                                       CurrentTime);
                                rdp_send_input(time(NULL), RDP_INPUT_MOUSE,
                                               MOUSE_FLAG_MOVE, xevent.xmotion.x, xevent.xmotion.y);
                                break;

                        case FocusIn:
                                if (xevent.xfocus.mode == NotifyGrab)
                                        break;
                                g_focused = True;
                                reset_modifier_keys();
                                if (g_grab_keyboard && g_mouse_in_wnd)
                                        XGrabKeyboard(g_display, g_wnd, True,
                                                      GrabModeAsync, GrabModeAsync, CurrentTime);
                                break;

                        case FocusOut:
                                if (xevent.xfocus.mode == NotifyUngrab)
                                        break;
                                g_focused = False;
                                if (xevent.xfocus.mode == NotifyWhileGrabbed)
                                        XUngrabKeyboard(g_display, CurrentTime);
                                break;

                        case EnterNotify:
                                /* we only register for this event when in fullscreen mode */
                                /* or grab_keyboard */
                                g_mouse_in_wnd = True;
                                if (g_fullscreen)
                                {
                                        XSetInputFocus(g_display, g_wnd, RevertToPointerRoot,
                                                       CurrentTime);
                                        break;
                                }
                                if (g_focused)
                                        XGrabKeyboard(g_display, g_wnd, True,
                                                      GrabModeAsync, GrabModeAsync, CurrentTime);
                                break;

                        case LeaveNotify:
                                /* we only register for this event when grab_keyboard */
                                g_mouse_in_wnd = False;
                                XUngrabKeyboard(g_display, CurrentTime);
                                break;

                        case Expose:
                                XCopyArea(g_display, g_backstore, g_wnd, g_gc,
                                          xevent.xexpose.x, xevent.xexpose.y,
                                          xevent.xexpose.width,
                                          xevent.xexpose.height,
                                          xevent.xexpose.x, xevent.xexpose.y);
                                break;

                        case MappingNotify:
                                /* Refresh keyboard mapping if it has changed. This is important for
                                   Xvnc, since it allocates keycodes dynamically */
                                if (xevent.xmapping.request == MappingKeyboard
                                    || xevent.xmapping.request == MappingModifier)
                                        XRefreshKeyboardMapping(&xevent.xmapping);

                                if (xevent.xmapping.request == MappingModifier)
                                {
                                        XFreeModifiermap(g_mod_map);
                                        g_mod_map = XGetModifierMapping(g_display);
                                }
                                break;

                                /* clipboard stuff */
                        case SelectionNotify:
                                xclip_handle_SelectionNotify(&xevent.xselection);
                                break;
                        case SelectionRequest:
                                xclip_handle_SelectionRequest(&xevent.xselectionrequest);
                                break;
                        case SelectionClear:
                                xclip_handle_SelectionClear();
                                break;
                        case PropertyNotify:
                                xclip_handle_PropertyNotify(&xevent.xproperty);
                                break;
                }
        }
        /* Keep going */
        return 1;
}

/* Returns 0 after user quit, 1 otherwise */
int
ui_select(int rdp_socket)
{
        int n;
        fd_set rfds, wfds;
        struct timeval tv;
        BOOL s_timeout = False;

        while (True)
        {
                n = (rdp_socket > g_x_socket) ? rdp_socket : g_x_socket;
                /* Process any events already waiting */
                if (!xwin_process_events())
                        /* User quit */
                        return 0;

                FD_ZERO(&rfds);
                FD_ZERO(&wfds);
                FD_SET(rdp_socket, &rfds);
                FD_SET(g_x_socket, &rfds);

#ifdef WITH_RDPSND
                /* FIXME: there should be an API for registering fds */
                if (g_dsp_busy)
                {
                        FD_SET(g_dsp_fd, &wfds);
                        n = (g_dsp_fd > n) ? g_dsp_fd : n;
                }
#endif
                /* default timeout */
                tv.tv_sec = 60;
                tv.tv_usec = 0;

                /* add redirection handles */
                rdpdr_add_fds(&n, &rfds, &wfds, &tv, &s_timeout);

                n++;

                switch (select(n, &rfds, &wfds, NULL, &tv))
                {
                        case -1:
                                error("select: %s\n", strerror(errno));

                        case 0:
                                /* Abort serial read calls */
                                if (s_timeout)
                                        rdpdr_check_fds(&rfds, &wfds, (BOOL) True);
                                continue;
                }

                rdpdr_check_fds(&rfds, &wfds, (BOOL) False);

                if (FD_ISSET(rdp_socket, &rfds))
                        return 1;

#ifdef WITH_RDPSND
                if (g_dsp_busy && FD_ISSET(g_dsp_fd, &wfds))
                        wave_out_play();
#endif
        }
}

void
ui_move_pointer(int x, int y)
{
        XWarpPointer(g_display, g_wnd, g_wnd, 0, 0, 0, 0, x, y);
}

HBITMAP
ui_create_bitmap(int width, int height, uint8 * data)
{
        XImage *image;
        Pixmap bitmap;
        uint8 *tdata;
        int bitmap_pad;

        if (g_server_bpp == 8)
        {
                bitmap_pad = 8;
        }
        else
        {
                bitmap_pad = g_bpp;

                if (g_bpp == 24)
                        bitmap_pad = 32;
        }

        tdata = (g_owncolmap ? data : translate_image(width, height, data));
        bitmap = XCreatePixmap(g_display, g_wnd, width, height, g_depth);
        image = XCreateImage(g_display, g_visual, g_depth, ZPixmap, 0,
                             (char *) tdata, width, height, bitmap_pad, 0);

        XPutImage(g_display, bitmap, g_create_bitmap_gc, image, 0, 0, 0, 0, width, height);

        XFree(image);
        if (tdata != data)
                xfree(tdata);
        return (HBITMAP) bitmap;
}

void
ui_paint_bitmap(int x, int y, int cx, int cy, int width, int height, uint8 * data)
{
        XImage *image;
        uint8 *tdata;
        int bitmap_pad;

        if (g_server_bpp == 8)
        {
                bitmap_pad = 8;
        }
        else
        {
                bitmap_pad = g_bpp;

                if (g_bpp == 24)
                        bitmap_pad = 32;
        }

        tdata = (g_owncolmap ? data : translate_image(width, height, data));
        image = XCreateImage(g_display, g_visual, g_depth, ZPixmap, 0,
                             (char *) tdata, width, height, bitmap_pad, 0);

        if (g_ownbackstore)
        {
                XPutImage(g_display, g_backstore, g_gc, image, 0, 0, x, y, cx, cy);
                XCopyArea(g_display, g_backstore, g_wnd, g_gc, x, y, cx, cy, x, y);
        }
        else
        {
                XPutImage(g_display, g_wnd, g_gc, image, 0, 0, x, y, cx, cy);
        }

        XFree(image);
        if (tdata != data)
                xfree(tdata);
}

void
ui_destroy_bitmap(HBITMAP bmp)
{
        XFreePixmap(g_display, (Pixmap) bmp);
}

HGLYPH
ui_create_glyph(int width, int height, uint8 * data)
{
        XImage *image;
        Pixmap bitmap;
        int scanline;

        scanline = (width + 7) / 8;

        bitmap = XCreatePixmap(g_display, g_wnd, width, height, 1);
        if (g_create_glyph_gc == 0)
                g_create_glyph_gc = XCreateGC(g_display, bitmap, 0, NULL);

        image = XCreateImage(g_display, g_visual, 1, ZPixmap, 0, (char *) data,
                             width, height, 8, scanline);
        image->byte_order = MSBFirst;
        image->bitmap_bit_order = MSBFirst;
        XInitImage(image);

        XPutImage(g_display, bitmap, g_create_glyph_gc, image, 0, 0, 0, 0, width, height);

        XFree(image);
        return (HGLYPH) bitmap;
}

void
ui_destroy_glyph(HGLYPH glyph)
{
        XFreePixmap(g_display, (Pixmap) glyph);
}

HCURSOR
ui_create_cursor(unsigned int x, unsigned int y, int width, int height,
                 uint8 * andmask, uint8 * xormask)
{
        HGLYPH maskglyph, cursorglyph;
        XColor bg, fg;
        Cursor xcursor;
        uint8 *cursor, *pcursor;
        uint8 *mask, *pmask;
        uint8 nextbit;
        int scanline, offset;
        int i, j;

        scanline = (width + 7) / 8;
        offset = scanline * height;

        cursor = (uint8 *) xmalloc(offset);
        memset(cursor, 0, offset);

        mask = (uint8 *) xmalloc(offset);
        memset(mask, 0, offset);

        /* approximate AND and XOR masks with a monochrome X pointer */
        for (i = 0; i < height; i++)
        {
                offset -= scanline;
                pcursor = &cursor[offset];
                pmask = &mask[offset];

                for (j = 0; j < scanline; j++)
                {
                        for (nextbit = 0x80; nextbit != 0; nextbit >>= 1)
                        {
                                if (xormask[0] || xormask[1] || xormask[2])
                                {
                                        *pcursor |= (~(*andmask) & nextbit);
                                        *pmask |= nextbit;
                                }
                                else
                                {
                                        *pcursor |= ((*andmask) & nextbit);
                                        *pmask |= (~(*andmask) & nextbit);
                                }

                                xormask += 3;
                        }

                        andmask++;
                        pcursor++;
                        pmask++;
                }
        }

        fg.red = fg.blue = fg.green = 0xffff;
        bg.red = bg.blue = bg.green = 0x0000;
        fg.flags = bg.flags = DoRed | DoBlue | DoGreen;

        cursorglyph = ui_create_glyph(width, height, cursor);
        maskglyph = ui_create_glyph(width, height, mask);

        xcursor =
                XCreatePixmapCursor(g_display, (Pixmap) cursorglyph,
                                    (Pixmap) maskglyph, &fg, &bg, x, y);

        ui_destroy_glyph(maskglyph);
        ui_destroy_glyph(cursorglyph);
        xfree(mask);
        xfree(cursor);
        return (HCURSOR) xcursor;
}

void
ui_set_cursor(HCURSOR cursor)
{
        g_current_cursor = (Cursor) cursor;
        XDefineCursor(g_display, g_wnd, g_current_cursor);
}

void
ui_destroy_cursor(HCURSOR cursor)
{
        XFreeCursor(g_display, (Cursor) cursor);
}

void
ui_set_null_cursor(void)
{
        ui_set_cursor(g_null_cursor);
}

#define MAKE_XCOLOR(xc,c) \
                (xc)->red   = ((c)->red   << 8) | (c)->red; \
                (xc)->green = ((c)->green << 8) | (c)->green; \
                (xc)->blue  = ((c)->blue  << 8) | (c)->blue; \
                (xc)->flags = DoRed | DoGreen | DoBlue;


HCOLOURMAP
ui_create_colourmap(COLOURMAP * colours)
{
        COLOURENTRY *entry;
        int i, ncolours = colours->ncolours;
        if (!g_owncolmap)
        {
                uint32 *map = (uint32 *) xmalloc(sizeof(*g_colmap) * ncolours);
                XColor xentry;
                XColor xc_cache[256];
                uint32 colour;
                int colLookup = 256;
                for (i = 0; i < ncolours; i++)
                {
                        entry = &colours->colours[i];
                        MAKE_XCOLOR(&xentry, entry);

                        if (XAllocColor(g_display, g_xcolmap, &xentry) == 0)
                        {
                                /* Allocation failed, find closest match. */
                                int j = 256;
                                int nMinDist = 3 * 256 * 256;
                                long nDist = nMinDist;

                                /* only get the colors once */
                                while (colLookup--)
                                {
                                        xc_cache[colLookup].pixel = colLookup;
                                        xc_cache[colLookup].red = xc_cache[colLookup].green =
                                                xc_cache[colLookup].blue = 0;
                                        xc_cache[colLookup].flags = 0;
                                        XQueryColor(g_display,
                                                    DefaultColormap(g_display,
                                                                    DefaultScreen(g_display)),
                                                    &xc_cache[colLookup]);
                                }
                                colLookup = 0;

                                /* approximate the pixel */
                                while (j--)
                                {
                                        if (xc_cache[j].flags)
                                        {
                                                nDist = ((long) (xc_cache[j].red >> 8) -
                                                         (long) (xentry.red >> 8)) *
                                                        ((long) (xc_cache[j].red >> 8) -
                                                         (long) (xentry.red >> 8)) +
                                                        ((long) (xc_cache[j].green >> 8) -
                                                         (long) (xentry.green >> 8)) *
                                                        ((long) (xc_cache[j].green >> 8) -
                                                         (long) (xentry.green >> 8)) +
                                                        ((long) (xc_cache[j].blue >> 8) -
                                                         (long) (xentry.blue >> 8)) *
                                                        ((long) (xc_cache[j].blue >> 8) -
                                                         (long) (xentry.blue >> 8));
                                        }
                                        if (nDist < nMinDist)
                                        {
                                                nMinDist = nDist;
                                                xentry.pixel = j;
                                        }
                                }
                        }
                        colour = xentry.pixel;

                        /* update our cache */
                        if (xentry.pixel < 256)
                        {
                                xc_cache[xentry.pixel].red = xentry.red;
                                xc_cache[xentry.pixel].green = xentry.green;
                                xc_cache[xentry.pixel].blue = xentry.blue;

                        }

                        map[i] = colour;
                }
                return map;
        }
        else
        {
                XColor *xcolours, *xentry;
                Colormap map;

                xcolours = (XColor *) xmalloc(sizeof(XColor) * ncolours);
                for (i = 0; i < ncolours; i++)
                {
                        entry = &colours->colours[i];
                        xentry = &xcolours[i];
                        xentry->pixel = i;
                        MAKE_XCOLOR(xentry, entry);
                }

                map = XCreateColormap(g_display, g_wnd, g_visual, AllocAll);
                XStoreColors(g_display, map, xcolours, ncolours);

                xfree(xcolours);
                return (HCOLOURMAP) map;
        }
}

void
ui_destroy_colourmap(HCOLOURMAP map)
{
        if (!g_owncolmap)
                xfree(map);
        else
                XFreeColormap(g_display, (Colormap) map);
}

void
ui_set_colourmap(HCOLOURMAP map)
{
        if (!g_owncolmap)
        {
                if (g_colmap)
                        xfree(g_colmap);

                g_colmap = (uint32 *) map;
        }
        else
                XSetWindowColormap(g_display, g_wnd, (Colormap) map);
}

void
ui_set_clip(int x, int y, int cx, int cy)
{
        XRectangle rect;

        rect.x = x;
        rect.y = y;
        rect.width = cx;
        rect.height = cy;
        XSetClipRectangles(g_display, g_gc, 0, 0, &rect, 1, YXBanded);
}

void
ui_reset_clip(void)
{
        XRectangle rect;

        rect.x = 0;
        rect.y = 0;
        rect.width = g_width;
        rect.height = g_height;
        XSetClipRectangles(g_display, g_gc, 0, 0, &rect, 1, YXBanded);
}

void
ui_bell(void)
{
        XBell(g_display, 0);
}

void
ui_destblt(uint8 opcode,
           /* dest */ int x, int y, int cx, int cy)
{
        SET_FUNCTION(opcode);
        FILL_RECTANGLE(x, y, cx, cy);
        RESET_FUNCTION(opcode);
}

static uint8 hatch_patterns[] = {
        0x00, 0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, /* 0 - bsHorizontal */
        0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, 0x08, /* 1 - bsVertical */
        0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01, /* 2 - bsFDiagonal */
        0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, /* 3 - bsBDiagonal */
        0x08, 0x08, 0x08, 0xff, 0x08, 0x08, 0x08, 0x08, /* 4 - bsCross */
        0x81, 0x42, 0x24, 0x18, 0x18, 0x24, 0x42, 0x81  /* 5 - bsDiagCross */
};

void
ui_patblt(uint8 opcode,
          /* dest */ int x, int y, int cx, int cy,
          /* brush */ BRUSH * brush, int bgcolour, int fgcolour)
{
        Pixmap fill;
        uint8 i, ipattern[8];

        SET_FUNCTION(opcode);

        switch (brush->style)
        {
                case 0: /* Solid */
                        SET_FOREGROUND(fgcolour);
                        FILL_RECTANGLE_BACKSTORE(x, y, cx, cy);
                        break;

                case 2: /* Hatch */
                        fill = (Pixmap) ui_create_glyph(8, 8,
                                                        hatch_patterns + brush->pattern[0] * 8);
                        SET_FOREGROUND(fgcolour);
                        SET_BACKGROUND(bgcolour);
                        XSetFillStyle(g_display, g_gc, FillOpaqueStippled);
                        XSetStipple(g_display, g_gc, fill);
                        XSetTSOrigin(g_display, g_gc, brush->xorigin, brush->yorigin);
                        FILL_RECTANGLE_BACKSTORE(x, y, cx, cy);
                        XSetFillStyle(g_display, g_gc, FillSolid);
                        XSetTSOrigin(g_display, g_gc, 0, 0);
                        ui_destroy_glyph((HGLYPH) fill);
                        break;

                case 3: /* Pattern */
                        for (i = 0; i != 8; i++)
                                ipattern[7 - i] = brush->pattern[i];
                        fill = (Pixmap) ui_create_glyph(8, 8, ipattern);
                        SET_FOREGROUND(bgcolour);
                        SET_BACKGROUND(fgcolour);
                        XSetFillStyle(g_display, g_gc, FillOpaqueStippled);
                        XSetStipple(g_display, g_gc, fill);
                        XSetTSOrigin(g_display, g_gc, brush->xorigin, brush->yorigin);
                        FILL_RECTANGLE_BACKSTORE(x, y, cx, cy);
                        XSetFillStyle(g_display, g_gc, FillSolid);
                        XSetTSOrigin(g_display, g_gc, 0, 0);
                        ui_destroy_glyph((HGLYPH) fill);
                        break;

                default:
                        unimpl("brush %d\n", brush->style);
        }

        RESET_FUNCTION(opcode);

        if (g_ownbackstore)
                XCopyArea(g_display, g_backstore, g_wnd, g_gc, x, y, cx, cy, x, y);
}

void
ui_screenblt(uint8 opcode,
             /* dest */ int x, int y, int cx, int cy,
             /* src */ int srcx, int srcy)
{
        SET_FUNCTION(opcode);
        if (g_ownbackstore)
        {
                if (g_Unobscured)
                {
                        XCopyArea(g_display, g_wnd, g_wnd, g_gc, srcx, srcy, cx, cy, x, y);
                        XCopyArea(g_display, g_backstore, g_backstore, g_gc, srcx, srcy, cx, cy, x,
                                  y);
                }
                else
                {
                        XCopyArea(g_display, g_backstore, g_wnd, g_gc, srcx, srcy, cx, cy, x, y);
                        XCopyArea(g_display, g_backstore, g_backstore, g_gc, srcx, srcy, cx, cy, x,
                                  y);
                }
        }
        else
        {
                XCopyArea(g_display, g_wnd, g_wnd, g_gc, srcx, srcy, cx, cy, x, y);
        }
        RESET_FUNCTION(opcode);
}

void
ui_memblt(uint8 opcode,
          /* dest */ int x, int y, int cx, int cy,
          /* src */ HBITMAP src, int srcx, int srcy)
{
        SET_FUNCTION(opcode);
        XCopyArea(g_display, (Pixmap) src, g_wnd, g_gc, srcx, srcy, cx, cy, x, y);
        if (g_ownbackstore)
                XCopyArea(g_display, (Pixmap) src, g_backstore, g_gc, srcx, srcy, cx, cy, x, y);
        RESET_FUNCTION(opcode);
}

void
ui_triblt(uint8 opcode,
          /* dest */ int x, int y, int cx, int cy,
          /* src */ HBITMAP src, int srcx, int srcy,
          /* brush */ BRUSH * brush, int bgcolour, int fgcolour)
{
        /* This is potentially difficult to do in general. Until someone
           comes up with a more efficient way of doing it I am using cases. */

        switch (opcode)
        {
                case 0x69:      /* PDSxxn */
                        ui_memblt(ROP2_XOR, x, y, cx, cy, src, srcx, srcy);
                        ui_patblt(ROP2_NXOR, x, y, cx, cy, brush, bgcolour, fgcolour);
                        break;

                case 0xb8:      /* PSDPxax */
                        ui_patblt(ROP2_XOR, x, y, cx, cy, brush, bgcolour, fgcolour);
                        ui_memblt(ROP2_AND, x, y, cx, cy, src, srcx, srcy);
                        ui_patblt(ROP2_XOR, x, y, cx, cy, brush, bgcolour, fgcolour);
                        break;

                case 0xc0:      /* PSa */
                        ui_memblt(ROP2_COPY, x, y, cx, cy, src, srcx, srcy);
                        ui_patblt(ROP2_AND, x, y, cx, cy, brush, bgcolour, fgcolour);
                        break;

                default:
                        unimpl("triblt 0x%x\n", opcode);
                        ui_memblt(ROP2_COPY, x, y, cx, cy, src, srcx, srcy);
        }
}

void
ui_line(uint8 opcode,
        /* dest */ int startx, int starty, int endx, int endy,
        /* pen */ PEN * pen)
{
        SET_FUNCTION(opcode);
        SET_FOREGROUND(pen->colour);
        XDrawLine(g_display, g_wnd, g_gc, startx, starty, endx, endy);
        if (g_ownbackstore)
                XDrawLine(g_display, g_backstore, g_gc, startx, starty, endx, endy);
        RESET_FUNCTION(opcode);
}

void
ui_rect(
               /* dest */ int x, int y, int cx, int cy,
               /* brush */ int colour)
{
        SET_FOREGROUND(colour);
        FILL_RECTANGLE(x, y, cx, cy);
}

/* warning, this function only draws on wnd or backstore, not both */
void
ui_draw_glyph(int mixmode,
              /* dest */ int x, int y, int cx, int cy,
              /* src */ HGLYPH glyph, int srcx, int srcy,
              int bgcolour, int fgcolour)
{
        SET_FOREGROUND(fgcolour);
        SET_BACKGROUND(bgcolour);

        XSetFillStyle(g_display, g_gc,
                      (mixmode == MIX_TRANSPARENT) ? FillStippled : FillOpaqueStippled);
        XSetStipple(g_display, g_gc, (Pixmap) glyph);
        XSetTSOrigin(g_display, g_gc, x, y);

        FILL_RECTANGLE_BACKSTORE(x, y, cx, cy);

        XSetFillStyle(g_display, g_gc, FillSolid);
}

#define DO_GLYPH(ttext,idx) \
{\
  glyph = cache_get_font (font, ttext[idx]);\
  if (!(flags & TEXT2_IMPLICIT_X))\
  {\
    xyoffset = ttext[++idx];\
    if ((xyoffset & 0x80))\
    {\
      if (flags & TEXT2_VERTICAL)\
        y += ttext[idx+1] | (ttext[idx+2] << 8);\
      else\
        x += ttext[idx+1] | (ttext[idx+2] << 8);\
      idx += 2;\
    }\
    else\
    {\
      if (flags & TEXT2_VERTICAL)\
        y += xyoffset;\
      else\
        x += xyoffset;\
    }\
  }\
  if (glyph != NULL)\
  {\
    x1 = x + glyph->offset;\
    y1 = y + glyph->baseline;\
    XSetStipple(g_display, g_gc, (Pixmap) glyph->pixmap);\
    XSetTSOrigin(g_display, g_gc, x1, y1);\
    FILL_RECTANGLE_BACKSTORE(x1, y1, glyph->width, glyph->height);\
    if (flags & TEXT2_IMPLICIT_X)\
      x += glyph->width;\
  }\
}

void
ui_draw_text(uint8 font, uint8 flags, int mixmode, int x, int y,
             int clipx, int clipy, int clipcx, int clipcy,
             int boxx, int boxy, int boxcx, int boxcy, int bgcolour,
             int fgcolour, uint8 * text, uint8 length)
{
        FONTGLYPH *glyph;
        int i, j, xyoffset, x1, y1;
        DATABLOB *entry;

        SET_FOREGROUND(bgcolour);

        /* Sometimes, the boxcx value is something really large, like
           32691. This makes XCopyArea fail with Xvnc. The code below
           is a quick fix. */
        if (boxx + boxcx > g_width)
                boxcx = g_width - boxx;

        if (boxcx > 1)
        {
                FILL_RECTANGLE_BACKSTORE(boxx, boxy, boxcx, boxcy);
        }
        else if (mixmode == MIX_OPAQUE)
        {
                FILL_RECTANGLE_BACKSTORE(clipx, clipy, clipcx, clipcy);
        }

        SET_FOREGROUND(fgcolour);
        SET_BACKGROUND(bgcolour);
        XSetFillStyle(g_display, g_gc, FillStippled);

        /* Paint text, character by character */
        for (i = 0; i < length;)
        {
                switch (text[i])
                {
                        case 0xff:
                                if (i + 2 < length)
                                        cache_put_text(text[i + 1], text, text[i + 2]);
                                else
                                {
                                        error("this shouldn't be happening\n");
                                        exit(1);
                                }
                                /* this will move pointer from start to first character after FF command */
                                length -= i + 3;
                                text = &(text[i + 3]);
                                i = 0;
                                break;

                        case 0xfe:
                                entry = cache_get_text(text[i + 1]);
                                if (entry != NULL)
                                {
                                        if ((((uint8 *) (entry->data))[1] ==
                                             0) && (!(flags & TEXT2_IMPLICIT_X)))
                                        {
                                                if (flags & TEXT2_VERTICAL)
                                                        y += text[i + 2];
                                                else
                                                        x += text[i + 2];
                                        }
                                        for (j = 0; j < entry->size; j++)
                                                DO_GLYPH(((uint8 *) (entry->data)), j);
                                }
                                if (i + 2 < length)
                                        i += 3;
                                else
                                        i += 2;
                                length -= i;
                                /* this will move pointer from start to first character after FE command */
                                text = &(text[i]);
                                i = 0;
                                break;

                        default:
                                DO_GLYPH(text, i);
                                i++;
                                break;
                }
        }

        XSetFillStyle(g_display, g_gc, FillSolid);

        if (g_ownbackstore)
        {
                if (boxcx > 1)
                        XCopyArea(g_display, g_backstore, g_wnd, g_gc, boxx,
                                  boxy, boxcx, boxcy, boxx, boxy);
                else
                        XCopyArea(g_display, g_backstore, g_wnd, g_gc, clipx,
                                  clipy, clipcx, clipcy, clipx, clipy);
        }
}

void
ui_desktop_save(uint32 offset, int x, int y, int cx, int cy)
{
        Pixmap pix;
        XImage *image;

        if (g_ownbackstore)
        {
                image = XGetImage(g_display, g_backstore, x, y, cx, cy, AllPlanes, ZPixmap);
        }
        else
        {
                pix = XCreatePixmap(g_display, g_wnd, cx, cy, g_depth);
                XCopyArea(g_display, g_wnd, pix, g_gc, x, y, cx, cy, 0, 0);
                image = XGetImage(g_display, pix, 0, 0, cx, cy, AllPlanes, ZPixmap);
                XFreePixmap(g_display, pix);
        }

        offset *= g_bpp / 8;
        cache_put_desktop(offset, cx, cy, image->bytes_per_line, g_bpp / 8, (uint8 *) image->data);

        XDestroyImage(image);
}

void
ui_desktop_restore(uint32 offset, int x, int y, int cx, int cy)
{
        XImage *image;
        uint8 *data;

        offset *= g_bpp / 8;
        data = cache_get_desktop(offset, cx, cy, g_bpp / 8);
        if (data == NULL)
                return;

        image = XCreateImage(g_display, g_visual, g_depth, ZPixmap, 0,
                             (char *) data, cx, cy, BitmapPad(g_display), cx * g_bpp / 8);

        if (g_ownbackstore)
        {
                XPutImage(g_display, g_backstore, g_gc, image, 0, 0, x, y, cx, cy);
                XCopyArea(g_display, g_backstore, g_wnd, g_gc, x, y, cx, cy, x, y);
        }
        else
        {
                XPutImage(g_display, g_wnd, g_gc, image, 0, 0, x, y, cx, cy);
        }

        XFree(image);
}

/* these do nothing here but are used in uiports */
void
ui_begin_update(void)
{
}

void
ui_end_update(void)
{
}