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/*-*-c++-*-
* $Id$
*
* This file is part of plptools.
*
* Copyright (C) 1999-2001 Fritz Elfert <felfert@to.com>
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#ifndef _PSIBITMAP_H_
#define _PSIBITMAP_H_
#include <bufferstore.h>
/**
* This function is used by encodeBitmap for retrieving image data.
* It must return a gray value between 0 and 255 where 0 is black and
* 255 is white.
*
* @param x The x coordinate of the pixel to get (0 = left)
* @param y The y coordinate of the pixel to get (0 = top)
*/
typedef int (*getPixelFunction_t)(int x, int y);
/**
* Convert an image into a bitmap in Psion format.
*
* @param width The width of the image to convert.
* @param height The height of the image to convert.
* @param getPixel Pointer to a function for retrieving pixel values.
* @param rle Flag: Perform RLE compression (currently ignored).
* @param out Output buffer; gets filled with the Psion representation
* of the converted image.
*/
extern void
encodeBitmap(int width, int height, getPixelFunction_t getPixel,
bool rle, bufferStore &out);
/**
* Convert a Psion bitmap to a 8bit/pixel grayscale image.
*
* @param p Pointer to an input buffer which contains the Psion-formatted
* bitmap to convert. Must start with a Psion bitmap header.
* @param width On return, the image width in pixels is returned here.
* @param height On return, the image height in pixels is returned here.
* @param out Buffer which gets filled with the raw image data. Each pixel
* is represented by a byte. The image data is organized in
* height scanlines of width bytes, starting with the topmost
* scanline.
*
* @returns true on success, false if input data is inconsistent.
*/
extern bool
decodeBitmap(const unsigned char *p, int &width, int &height, bufferStore &out);
#endif // !_PSIBITMAP_H_
/*
* Local variables:
* c-basic-offset: 4
* End:
*/
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