mode12.h

/**
 * Copyright (c) 2005 Hin-Tak Leung. All rights reserved.
 *
 **/
/*
    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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/
/**
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 **/

enum
  {
    eLiteral = 0,
    eRLE = 0x80
  };

enum
  {
    eeNewPixel = 0x0,     // 00 00 00 00
    eeWPixel = 0x20,      // 00 10 00 00
    eeNEPixel = 0x40,     // 01 00 00 00
    eeCachedColor = 0x60, // 01 10 00 00
  };

int mode12gray_compress(int bytecount, unsigned char *current,
                        unsigned char *previous, unsigned char *compressed);

int mode12color_compress(int pixelcount, unsigned char *current,
                        unsigned char *previous, unsigned char *compressed);