orders.cpp

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/*
   rdesktop: A Remote Desktop Protocol client.
   RDP order processing
   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 "rdesktop.h"
#include "orders.h"

extern uint8 *next_packet;
static RDP_ORDER_STATE order_state;

/* Read field indicating which parameters are present */
static void
rdp_in_present(STREAM s, uint32 * present, uint8 flags, int size)
{
        uint8 bits;
        int i;

        if (flags & RDP_ORDER_SMALL)
        {
                size--;
        }

        if (flags & RDP_ORDER_TINY)
        {
                if (size < 2)
                        size = 0;
                else
                        size -= 2;
        }

        *present = 0;
        for (i = 0; i < size; i++)
        {
                in_uint8(s, bits);
                *present |= bits << (i * 8);
        }
}

/* Read a co-ordinate (16-bit, or 8-bit delta) */
static void
rdp_in_coord(STREAM s, sint16 * coord, BOOL delta)
{
        sint8 change;

        if (delta)
        {
                in_uint8(s, change);
                *coord += change;
        }
        else
        {
                in_uint16_le(s, *coord);
        }
}

/* Read a colour entry */
static void
rdp_in_colour(STREAM s, uint32 * colour)
{
        uint32 i;
        in_uint8(s, i);
        *colour = i;
        in_uint8(s, i);
        *colour |= i << 8;
        in_uint8(s, i);
        *colour |= i << 16;
}

/* Parse bounds information */
static BOOL
rdp_parse_bounds(STREAM s, BOUNDS * bounds)
{
        uint8 present;

        in_uint8(s, present);

        if (present & 1)
                rdp_in_coord(s, &bounds->left, False);
        else if (present & 16)
                rdp_in_coord(s, &bounds->left, True);

        if (present & 2)
                rdp_in_coord(s, &bounds->top, False);
        else if (present & 32)
                rdp_in_coord(s, &bounds->top, True);

        if (present & 4)
                rdp_in_coord(s, &bounds->right, False);
        else if (present & 64)
                rdp_in_coord(s, &bounds->right, True);

        if (present & 8)
                rdp_in_coord(s, &bounds->bottom, False);
        else if (present & 128)
                rdp_in_coord(s, &bounds->bottom, True);

        return s_check(s);
}

/* Parse a pen */
static BOOL
rdp_parse_pen(STREAM s, PEN * pen, uint32 present)
{
        if (present & 1)
                in_uint8(s, pen->style);

        if (present & 2)
                in_uint8(s, pen->width);

        if (present & 4)
                rdp_in_colour(s, &pen->colour);

        return s_check(s);
}

/* Parse a brush */
static BOOL
rdp_parse_brush(STREAM s, BRUSH * brush, uint32 present)
{
        if (present & 1)
                in_uint8(s, brush->xorigin);

        if (present & 2)
                in_uint8(s, brush->yorigin);

        if (present & 4)
                in_uint8(s, brush->style);

        if (present & 8)
                in_uint8(s, brush->pattern[0]);

        if (present & 16)
                in_uint8a(s, &brush->pattern[1], 7);

        return s_check(s);
}

/* Process a destination blt order */
static void
process_destblt(STREAM s, DESTBLT_ORDER * os, uint32 present, BOOL delta)
{
        if (present & 0x01)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x02)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x04)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x08)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x10)
                in_uint8(s, os->opcode);

        DEBUG(("DESTBLT(op=0x%x,x=%d,y=%d,cx=%d,cy=%d)\n",
               os->opcode, os->x, os->y, os->cx, os->cy));

        ui_destblt(ROP2_S(os->opcode), os->x, os->y, os->cx, os->cy);
}

/* Process a pattern blt order */
static void
process_patblt(STREAM s, PATBLT_ORDER * os, uint32 present, BOOL delta)
{
        if (present & 0x0001)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x0002)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x0004)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x0008)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x0010)
                in_uint8(s, os->opcode);

        if (present & 0x0020)
                rdp_in_colour(s, &os->bgcolour);

        if (present & 0x0040)
                rdp_in_colour(s, &os->fgcolour);

        rdp_parse_brush(s, &os->brush, present >> 7);

        DEBUG(("PATBLT(op=0x%x,x=%d,y=%d,cx=%d,cy=%d,bs=%d,bg=0x%x,fg=0x%x)\n", os->opcode, os->x,
               os->y, os->cx, os->cy, os->brush.style, os->bgcolour, os->fgcolour));

        ui_patblt(ROP2_P(os->opcode), os->x, os->y, os->cx, os->cy,
                  &os->brush, os->bgcolour, os->fgcolour);
}

/* Process a screen blt order */
static void
process_screenblt(STREAM s, SCREENBLT_ORDER * os, uint32 present, BOOL delta)
{
        if (present & 0x0001)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x0002)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x0004)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x0008)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x0010)
                in_uint8(s, os->opcode);

        if (present & 0x0020)
                rdp_in_coord(s, &os->srcx, delta);

        if (present & 0x0040)
                rdp_in_coord(s, &os->srcy, delta);

        DEBUG(("SCREENBLT(op=0x%x,x=%d,y=%d,cx=%d,cy=%d,srcx=%d,srcy=%d)\n",
               os->opcode, os->x, os->y, os->cx, os->cy, os->srcx, os->srcy));

        ui_screenblt(ROP2_S(os->opcode), os->x, os->y, os->cx, os->cy, os->srcx, os->srcy);
}

/* Process a line order */
static void
process_line(STREAM s, LINE_ORDER * os, uint32 present, BOOL delta)
{
        if (present & 0x0001)
                in_uint16_le(s, os->mixmode);

        if (present & 0x0002)
                rdp_in_coord(s, &os->startx, delta);

        if (present & 0x0004)
                rdp_in_coord(s, &os->starty, delta);

        if (present & 0x0008)
                rdp_in_coord(s, &os->endx, delta);

        if (present & 0x0010)
                rdp_in_coord(s, &os->endy, delta);

        if (present & 0x0020)
                rdp_in_colour(s, &os->bgcolour);

        if (present & 0x0040)
                in_uint8(s, os->opcode);

        rdp_parse_pen(s, &os->pen, present >> 7);

        DEBUG(("LINE(op=0x%x,sx=%d,sy=%d,dx=%d,dx=%d,fg=0x%x)\n",
               os->opcode, os->startx, os->starty, os->endx, os->endy, os->pen.colour));

        if (os->opcode < 0x01 || os->opcode > 0x10)
        {
                error("bad ROP2 0x%x\n", os->opcode);
                return;
        }

        ui_line(os->opcode - 1, os->startx, os->starty, os->endx, os->endy, &os->pen);
}

/* Process an opaque rectangle order */
static void
process_rect(STREAM s, RECT_ORDER * os, uint32 present, BOOL delta)
{
        uint32 i;
        if (present & 0x01)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x02)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x04)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x08)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x10)
        {
                in_uint8(s, i);
                os->colour = (os->colour & 0xffffff00) | i;
        }

        if (present & 0x20)
        {
                in_uint8(s, i);
                os->colour = (os->colour & 0xffff00ff) | (i << 8);
        }

        if (present & 0x40)
        {
                in_uint8(s, i);
                os->colour = (os->colour & 0xff00ffff) | (i << 16);
        }

        DEBUG(("RECT(x=%d,y=%d,cx=%d,cy=%d,fg=0x%x)\n", os->x, os->y, os->cx, os->cy, os->colour));

        ui_rect(os->x, os->y, os->cx, os->cy, os->colour);
}

/* Process a desktop save order */
static void
process_desksave(STREAM s, DESKSAVE_ORDER * os, uint32 present, BOOL delta)
{
        int width, height;

        if (present & 0x01)
                in_uint32_le(s, os->offset);

        if (present & 0x02)
                rdp_in_coord(s, &os->left, delta);

        if (present & 0x04)
                rdp_in_coord(s, &os->top, delta);

        if (present & 0x08)
                rdp_in_coord(s, &os->right, delta);

        if (present & 0x10)
                rdp_in_coord(s, &os->bottom, delta);

        if (present & 0x20)
                in_uint8(s, os->action);

        DEBUG(("DESKSAVE(l=%d,t=%d,r=%d,b=%d,off=%d,op=%d)\n",
               os->left, os->top, os->right, os->bottom, os->offset, os->action));

        width = os->right - os->left + 1;
        height = os->bottom - os->top + 1;

        if (os->action == 0)
                ui_desktop_save(os->offset, os->left, os->top, width, height);
        else
                ui_desktop_restore(os->offset, os->left, os->top, width, height);
}

/* Process a memory blt order */
static void
process_memblt(STREAM s, MEMBLT_ORDER * os, uint32 present, BOOL delta)
{
        HBITMAP bitmap;

        if (present & 0x0001)
        {
                in_uint8(s, os->cache_id);
                in_uint8(s, os->colour_table);
        }

        if (present & 0x0002)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x0004)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x0008)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x0010)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x0020)
                in_uint8(s, os->opcode);

        if (present & 0x0040)
                rdp_in_coord(s, &os->srcx, delta);

        if (present & 0x0080)
                rdp_in_coord(s, &os->srcy, delta);

        if (present & 0x0100)
                in_uint16_le(s, os->cache_idx);

        DEBUG(("MEMBLT(op=0x%x,x=%d,y=%d,cx=%d,cy=%d,id=%d,idx=%d)\n",
               os->opcode, os->x, os->y, os->cx, os->cy, os->cache_id, os->cache_idx));

        bitmap = cache_get_bitmap(os->cache_id, os->cache_idx);
        if (bitmap == NULL)
                return;

        ui_memblt(ROP2_S(os->opcode), os->x, os->y, os->cx, os->cy, bitmap, os->srcx, os->srcy);
}

/* Process a 3-way blt order */
static void
process_triblt(STREAM s, TRIBLT_ORDER * os, uint32 present, BOOL delta)
{
        HBITMAP bitmap;

        if (present & 0x000001)
        {
                in_uint8(s, os->cache_id);
                in_uint8(s, os->colour_table);
        }

        if (present & 0x000002)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x000004)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x000008)
                rdp_in_coord(s, &os->cx, delta);

        if (present & 0x000010)
                rdp_in_coord(s, &os->cy, delta);

        if (present & 0x000020)
                in_uint8(s, os->opcode);

        if (present & 0x000040)
                rdp_in_coord(s, &os->srcx, delta);

        if (present & 0x000080)
                rdp_in_coord(s, &os->srcy, delta);

        if (present & 0x000100)
                rdp_in_colour(s, &os->bgcolour);

        if (present & 0x000200)
                rdp_in_colour(s, &os->fgcolour);

        rdp_parse_brush(s, &os->brush, present >> 10);

        if (present & 0x008000)
                in_uint16_le(s, os->cache_idx);

        if (present & 0x010000)
                in_uint16_le(s, os->unknown);

        DEBUG(("TRIBLT(op=0x%x,x=%d,y=%d,cx=%d,cy=%d,id=%d,idx=%d,bs=%d,bg=0x%x,fg=0x%x)\n",
               os->opcode, os->x, os->y, os->cx, os->cy, os->cache_id, os->cache_idx,
               os->brush.style, os->bgcolour, os->fgcolour));

        bitmap = cache_get_bitmap(os->cache_id, os->cache_idx);
        if (bitmap == NULL)
                return;

        ui_triblt(os->opcode, os->x, os->y, os->cx, os->cy,
                  bitmap, os->srcx, os->srcy, &os->brush, os->bgcolour, os->fgcolour);
}

/* Parse a delta co-ordinate in polyline order form */
static int
parse_delta(uint8 * buffer, int *offset)
{
        int value = buffer[(*offset)++];
        int two_byte = value & 0x80;

        if (value & 0x40)       /* sign bit */
                value |= ~0x3f;
        else
                value &= 0x3f;

        if (two_byte)
                value = (value << 8) | buffer[(*offset)++];

        return value;
}

/* Process a polyline order */
static void
process_polyline(STREAM s, POLYLINE_ORDER * os, uint32 present, BOOL delta)
{
        int index, line, data;
        int x, y, xfrom, yfrom;
        uint8 flags = 0;
        PEN pen;
        uint8 opcode;

        if (present & 0x01)
                rdp_in_coord(s, &os->x, delta);

        if (present & 0x02)
                rdp_in_coord(s, &os->y, delta);

        if (present & 0x04)
                in_uint8(s, os->opcode);

        if (present & 0x10)
                rdp_in_colour(s, &os->fgcolour);

        if (present & 0x20)
                in_uint8(s, os->lines);

        if (present & 0x40)
        {
                in_uint8(s, os->datasize);
                in_uint8a(s, os->data, os->datasize);
        }

        DEBUG(("POLYLINE(x=%d,y=%d,op=0x%x,fg=0x%x,n=%d,sz=%d)\n",
               os->x, os->y, os->opcode, os->fgcolour, os->lines, os->datasize));

        DEBUG(("Data: "));

        for (index = 0; index < os->datasize; index++)
                DEBUG(("%02x ", os->data[index]));

        DEBUG(("\n"));

        if (os->opcode < 0x01 || os->opcode > 0x10)
        {
                error("bad ROP2 0x%x\n", os->opcode);
                return;
        }

        opcode = os->opcode - 1;
        x = os->x;
        y = os->y;
        pen.style = pen.width = 0;
        pen.colour = os->fgcolour;

        index = 0;
        data = ((os->lines - 1) / 4) + 1;
        for (line = 0; (line < os->lines) && (data < os->datasize); line++)
        {
                xfrom = x;
                yfrom = y;

                if (line % 4 == 0)
                        flags = os->data[index++];

                if ((flags & 0xc0) == 0)
                        flags |= 0xc0;  /* none = both */

                if (flags & 0x40)
                        x += parse_delta(os->data, &data);

                if (flags & 0x80)
                        y += parse_delta(os->data, &data);

                ui_line(opcode, xfrom, yfrom, x, y, &pen);

                flags <<= 2;
        }
}

/* Process a text order */
static void
process_text2(STREAM s, TEXT2_ORDER * os, uint32 present, BOOL delta)
{
        int i;

        if (present & 0x000001)
                in_uint8(s, os->font);

        if (present & 0x000002)
                in_uint8(s, os->flags);

        if (present & 0x000004)
                in_uint8(s, os->unknown);

        if (present & 0x000008)
                in_uint8(s, os->mixmode);

        if (present & 0x000010)
                rdp_in_colour(s, &os->fgcolour);

        if (present & 0x000020)
                rdp_in_colour(s, &os->bgcolour);

        if (present & 0x000040)
                in_uint16_le(s, os->clipleft);

        if (present & 0x000080)
                in_uint16_le(s, os->cliptop);

        if (present & 0x000100)
                in_uint16_le(s, os->clipright);

        if (present & 0x000200)
                in_uint16_le(s, os->clipbottom);

        if (present & 0x000400)
                in_uint16_le(s, os->boxleft);

        if (present & 0x000800)
                in_uint16_le(s, os->boxtop);

        if (present & 0x001000)
                in_uint16_le(s, os->boxright);

        if (present & 0x002000)
                in_uint16_le(s, os->boxbottom);

        if (present & 0x004000) /* fix for connecting to a server that */
                in_uint8s(s, 10);    /* was disconnected with mstsc.exe */
                /* 0x008000, 0x020000, and 0x040000 are present too ??? */

        if (present & 0x080000)
                in_uint16_le(s, os->x);

        if (present & 0x100000)
                in_uint16_le(s, os->y);

        if (present & 0x200000)
        {
                in_uint8(s, os->length);
                in_uint8a(s, os->text, os->length);
        }

        DEBUG(("TEXT2(x=%d,y=%d,cl=%d,ct=%d,cr=%d,cb=%d,bl=%d,bt=%d,bb=%d,br=%d,fg=0x%x,bg=0x%x,font=%d,fl=0x%x,mix=%d,unk=0x%x,n=%d)\n", os->x, os->y, os->clipleft, os->cliptop, os->clipright, os->clipbottom, os->boxleft, os->boxtop, os->boxright, os->boxbottom, os->fgcolour, os->bgcolour, os->font, os->flags, os->mixmode, os->unknown, os->length));

        DEBUG(("Text: "));

        for (i = 0; i < os->length; i++)
                DEBUG(("%02x ", os->text[i]));

        DEBUG(("\n"));

        ui_draw_text(os->font, os->flags, os->mixmode, os->x, os->y,
                     os->clipleft, os->cliptop,
                     os->clipright - os->clipleft,
                     os->clipbottom - os->cliptop,
                     os->boxleft, os->boxtop,
                     os->boxright - os->boxleft,
                     os->boxbottom - os->boxtop, os->bgcolour, os->fgcolour, os->text, os->length);
}

/* Process a raw bitmap cache order */
static void
process_raw_bmpcache(STREAM s)
{
        HBITMAP bitmap;
        uint16 cache_idx, bufsize;
        uint8 cache_id, width, height, bpp, Bpp;
        uint8 *data, *inverted;
        int y;

        in_uint8(s, cache_id);
        in_uint8s(s, 1);        /* pad */
        in_uint8(s, width);
        in_uint8(s, height);
        in_uint8(s, bpp);
        Bpp = (bpp + 7) / 8;
        in_uint16_le(s, bufsize);
        in_uint16_le(s, cache_idx);
        in_uint8p(s, data, bufsize);

        DEBUG(("RAW_BMPCACHE(cx=%d,cy=%d,id=%d,idx=%d)\n", width, height, cache_id, cache_idx));
        inverted = (uint8*)xmalloc(width * height * Bpp);
        for (y = 0; y < height; y++)
        {
                memcpy(&inverted[(height - y - 1) * (width * Bpp)], &data[y * (width * Bpp)],
                       width * Bpp);
        }

        bitmap = ui_create_bitmap(width, height, inverted);
        xfree(inverted);
        cache_put_bitmap(cache_id, cache_idx, bitmap);
}

/* Process a bitmap cache order */
static void
process_bmpcache(STREAM s)
{
        HBITMAP bitmap;
        uint16 cache_idx, size;
        uint8 cache_id, width, height, bpp, Bpp;
        uint8 *data, *bmpdata;

        in_uint8(s, cache_id);
        in_uint8s(s, 1);        /* pad */
        in_uint8(s, width);
        in_uint8(s, height);
        in_uint8(s, bpp);
        Bpp = (bpp + 7) / 8;
        in_uint8s(s, 2);        /* bufsize */
        in_uint16_le(s, cache_idx);
        in_uint8s(s, 2);        /* pad */
        in_uint16_le(s, size);
        in_uint8s(s, 4);        /* row_size, final_size */
        in_uint8p(s, data, size);
        DEBUG(("BMPCACHE(cx=%d,cy=%d,id=%d,idx=%d)\n", width, height, cache_id, cache_idx));
        bmpdata = (uint8*)xmalloc(width * height * Bpp);
        if (bitmap_decompress(bmpdata, width, height, data, size, Bpp))
        {
                bitmap = ui_create_bitmap(width, height, bmpdata);
                cache_put_bitmap(cache_id, cache_idx, bitmap);
        }
        xfree(bmpdata);
}

/* Process a colourmap cache order */
static void
process_colcache(STREAM s)
{
        COLOURENTRY *entry;
        COLOURMAP map;
        HCOLOURMAP hmap;
        uint8 cache_id;
        int i;
        in_uint8(s, cache_id);
        in_uint16_le(s, map.ncolours);

        map.colours = (COLOURENTRY*)xmalloc(3 * map.ncolours);

        for (i = 0; i < map.ncolours; i++)
        {
                entry = &map.colours[i];
                in_uint8(s, entry->blue);
                in_uint8(s, entry->green);
                in_uint8(s, entry->red);
                in_uint8s(s, 1);        /* pad */
        }

        DEBUG(("COLCACHE(id=%d,n=%d)\n", cache_id, map.ncolours));

        hmap = ui_create_colourmap(&map);
        ui_set_colourmap(hmap);

        xfree(map.colours);
}

/* Process a font cache order */
static void
process_fontcache(STREAM s)
{
        HGLYPH bitmap;
        uint8 font, nglyphs;
        uint16 character, offset, baseline, width, height;
        int i, datasize;
        uint8 *data;

        in_uint8(s, font);
        in_uint8(s, nglyphs);

        DEBUG(("FONTCACHE(font=%d,n=%d)\n", font, nglyphs));

        for (i = 0; i < nglyphs; i++)
        {
                in_uint16_le(s, character);
                in_uint16_le(s, offset);
                in_uint16_le(s, baseline);
                in_uint16_le(s, width);
                in_uint16_le(s, height);

                datasize = (height * ((width + 7) / 8) + 3) & ~3;
                in_uint8p(s, data, datasize);

                bitmap = ui_create_glyph(width, height, data);
                cache_put_font(font, character, offset, baseline, width, height, bitmap);
        }
}

/* Process a secondary order */
static void
process_secondary_order(STREAM s)
{
        uint16 length;
        uint8 type;
        uint8 *next_order;

        in_uint16_le(s, length);
        in_uint8s(s, 2);        /* flags */
        in_uint8(s, type);

        next_order = s->p + length + 7;

        switch (type)
        {
                case RDP_ORDER_RAW_BMPCACHE:
                        process_raw_bmpcache(s);
                        break;

                case RDP_ORDER_COLCACHE:
                        process_colcache(s);
                        break;

                case RDP_ORDER_BMPCACHE:
                        process_bmpcache(s);
                        break;

                case RDP_ORDER_FONTCACHE:
                        process_fontcache(s);
                        break;

                default:
                        unimpl("secondary order %d\n", type);
        }

        s->p = next_order;
}

/* Process an order PDU */
void
process_orders(STREAM s)
{
        RDP_ORDER_STATE *os = &order_state;
        uint32 present;
        uint16 num_orders;
        uint8 order_flags;
        int size, processed = 0;
        BOOL delta;

        in_uint8s(s, 2);        /* pad */
        in_uint16_le(s, num_orders);
        in_uint8s(s, 2);        /* pad */

        while (processed < num_orders)
        {
                in_uint8(s, order_flags);

                if (!(order_flags & RDP_ORDER_STANDARD))
                {
                        error("order parsing failed\n");
                        break;
                }

                if (order_flags & RDP_ORDER_SECONDARY)
                {
                        process_secondary_order(s);
                }
                else
                {
                        if (order_flags & RDP_ORDER_CHANGE)
                        {
                                in_uint8(s, os->order_type);
                        }

                        switch (os->order_type)
                        {
                                case RDP_ORDER_TRIBLT:
                                case RDP_ORDER_TEXT2:
                                        size = 3;
                                        break;

                                case RDP_ORDER_PATBLT:
                                case RDP_ORDER_MEMBLT:
                                case RDP_ORDER_LINE:
                                        size = 2;
                                        break;

                                default:
                                        size = 1;
                        }

                        rdp_in_present(s, &present, order_flags, size);

                        if (order_flags & RDP_ORDER_BOUNDS)
                        {
                                if (!(order_flags & RDP_ORDER_LASTBOUNDS))
                                        rdp_parse_bounds(s, &os->bounds);

                                ui_set_clip(os->bounds.left,
                                            os->bounds.top,
                                            os->bounds.right -
                                            os->bounds.left + 1,
                                            os->bounds.bottom - os->bounds.top + 1);
                        }

                        delta = order_flags & RDP_ORDER_DELTA;

                        switch (os->order_type)
                        {
                                case RDP_ORDER_DESTBLT:
                                        process_destblt(s, &os->destblt, present, delta);
                                        break;

                                case RDP_ORDER_PATBLT:
                                        process_patblt(s, &os->patblt, present, delta);
                                        break;

                                case RDP_ORDER_SCREENBLT:
                                        process_screenblt(s, &os->screenblt, present, delta);
                                        break;

                                case RDP_ORDER_LINE:
                                        process_line(s, &os->line, present, delta);
                                        break;

                                case RDP_ORDER_RECT:
                                        process_rect(s, &os->rect, present, delta);
                                        break;

                                case RDP_ORDER_DESKSAVE:
                                        process_desksave(s, &os->desksave, present, delta);
                                        break;

                                case RDP_ORDER_MEMBLT:
                                        process_memblt(s, &os->memblt, present, delta);
                                        break;

                                case RDP_ORDER_TRIBLT:
                                        process_triblt(s, &os->triblt, present, delta);
                                        break;

                                case RDP_ORDER_POLYLINE:
                                        process_polyline(s, &os->polyline, present, delta);
                                        break;

                                case RDP_ORDER_TEXT2:
                                        process_text2(s, &os->text2, present, delta);
                                        break;

                                default:
                                        unimpl("order %d\n", os->order_type);
                                        return;
                        }

                        if (order_flags & RDP_ORDER_BOUNDS)
                                ui_reset_clip();
                }

                processed++;
        }

        if (s->p != next_packet)
                error("%d bytes remaining\n", (int) (next_packet - s->p));
}

/* Reset order state */
void
reset_order_state(void)
{
        memset(&order_state, 0, sizeof(order_state));
        order_state.order_type = RDP_ORDER_PATBLT;
}

---