/*
 *  Copyright (C) 2001 Const Kaplinsky.  All Rights Reserved.
 *
 *  This 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 software 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 software; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
 *  USA.
 */

/*
 * cursor.c - code to support cursor shape updates (XCursor, RichCursor).
 */

#include "oslib/osbyte.h"
#include "oslib/osword.h"

#include "vncviewer.h"


#define OPER_SAVE     0
#define OPER_RESTORE  1


/* Copied from Xvnc/lib/font/util/utilbitmap.c */
static unsigned char _reverse_byte[0x100] = {
	0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
	0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
	0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
	0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
	0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
	0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
	0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
	0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
	0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
	0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
	0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
	0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
	0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
	0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
	0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
	0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
	0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
	0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
	0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
	0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
	0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
	0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
	0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
	0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
	0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
	0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
	0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
	0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
	0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
	0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
	0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
	0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};



/*********************************************************************
 * HandleXCursor(). XCursor encoding support code is concentrated in
 * this function. XCursor shape updates are translated directly into X
 * cursors and saved in the prevXCursor variable.
 ********************************************************************/

Bool HandleXCursor(int xhot, int yhot, int width, int height)
{
  rfbXCursorColors colors;
  size_t bytesPerRow, bytesData;
  char *buf = NULL;
  unsigned int wret = 0, hret = 0;
  int i;

  bytesPerRow = (width + 7) / 8;
  bytesData = bytesPerRow * height;

  if (width * height) {
    if (!ReadFromRFBServer((char *)&colors, sz_rfbXCursorColors))
      return False;

    buf = malloc(bytesData * 2);
    if (buf == NULL)
      return False;

    if (!ReadFromRFBServer(buf, bytesData * 2)) {
      free(buf);
      return False;
    }
  }

  if (width * height == 0 || wret < width || hret < height) {
    /* Free resources, restore normal cursor. */
    if (buf != NULL)    free(buf);
//    xcursor = 1;
    xosbyte(osbyte_SELECT_POINTER, 1, 0);
    return True;
  }

//  bg.red   = (unsigned short)colors.backRed   << 8 | colors.backRed;
//  bg.green = (unsigned short)colors.backGreen << 8 | colors.backGreen;
//  bg.blue  = (unsigned short)colors.backBlue  << 8 | colors.backBlue;
//  fg.red   = (unsigned short)colors.foreRed   << 8 | colors.foreRed;
//  fg.green = (unsigned short)colors.foreGreen << 8 | colors.foreGreen;
//  fg.blue  = (unsigned short)colors.foreBlue  << 8 | colors.foreBlue;

  for (i = 0; i < bytesData * 2; i++)
    buf[i] = (char)_reverse_byte[(int)buf[i] & 0xFF];

  free(buf);

  /* Set cursor shape */
  if ((width <= 32) && (height <= 32)) {
    oswordpointer_define_block ptrblock;
    byte shape[32*32/4], *p, *bitmap, *mask;
    int x, y;

    memset(shape, 0, 32*32/4);
    p = shape;
    bitmap = (byte *)buf;
    mask = (byte *)buf+bytesData;
    for (y = 0; y < height; y++) {
      for (x = 0; x < width; x++)
        if (mask[x>>3] & (1<<(x &7))) {
          int c;
          c = bitmap[x>>3] & (1<<(x &7));
          if (c)
            *p |= 3<<(2*(x & 3));
          else
            *p |= 1<<(2*(x & 3));
        }
      p += (width+3)/4;
      bitmap += (width+7)/8;
      mask += (width+7)/8;
    }

//    xcursor = 2;
    ptrblock.op = oswordpointer_OP_DEFINE;
//    ptrblock.shape_no = xcursor;
    ptrblock.width = bytesPerRow;
    ptrblock.height = height;
    ptrblock.xactive = xhot;
    ptrblock.yactive = yhot;
    ptrblock.data = shape;
//    if (xoswordpointer_define(&ptrblock))    xcursor = 1;
  }
//  xosbyte(osbyte_SELECT_POINTER, xcursor, 0);

  return True;
}
