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/*
WBMP: Wireless Bitmap Type 0: B/W, Uncompressed Bitmap
Specification of the WBMP format can be found in the file:
SPEC-WAESpec-19990524.pdf
You can download the WAP specification on: http://www.wapforum.com/
gd_wbmp.c
Copyright (C) Johan Van den Brande (johan@vandenbrande.com)
Fixed: gdImageWBMPPtr, gdImageWBMP
Recoded: gdImageWBMPCtx for use with my wbmp library
(wbmp library included, but you can find the latest distribution
at http://www.vandenbrande.com/wbmp)
Implemented: gdImageCreateFromWBMPCtx, gdImageCreateFromWBMP
---------------------------------------------------------------------------
Parts of this code are from Maurice Smurlo.
** Copyright (C) Maurice Szmurlo --- T-SIT --- January 2000
** (Maurice.Szmurlo@info.unicaen.fr)
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
---------------------------------------------------------------------------
Parts od this code are inspired by 'pbmtowbmp.c' and 'wbmptopbm.c' by
Terje Sannum <terje@looplab.com>.
**
** Permission to use, copy, modify, and distribute this software and its
** documentation for any purpose and without fee is hereby granted, provided
** that the above copyright notice appear in all copies and that both that
** copyright notice and this permission notice appear in supporting
** documentation. This software is provided "as is" without express or
** implied warranty.
**
---------------------------------------------------------------------------
Todo:
gdCreateFromWBMP function for reading WBMP files
----------------------------------------------------------------------------
*/
#include <gd.h>
#include <gdfonts.h>
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include "wbmp.h"
/* gd_putout
** ---------
** Wrapper around gdPutC for use with writewbmp
**
*/
void
gd_putout (int i, void *out)
{
gdPutC ((unsigned char)i, (gdIOCtx *) out);
}
/* gd_getin
** --------
** Wrapper around gdGetC for use with readwbmp
**
*/
int
gd_getin (void *in)
{
return (gdGetC ((gdIOCtx *) in));
}
/* gdImageWBMPCtx
** --------------
** Write the image as a wbmp file
** Parameters are:
** image: gd image structure;
** fg: the index of the foreground color. any other value will be
** considered as background and will not be written
** out: the stream where to write
*/
void
gdImageWBMPCtx (gdImagePtr image, int fg, gdIOCtx * out)
{
int x, y, pos;
Wbmp *wbmp;
/* create the WBMP */
if ((wbmp = createwbmp (gdImageSX (image), gdImageSY (image), WBMP_WHITE)) == NULL)
fprintf (stderr, "Could not create WBMP\n");
/* fill up the WBMP structure */
pos = 0;
for (y = 0; y < gdImageSY (image); y++)
{
for (x = 0; x < gdImageSX (image); x++)
{
if (gdImageGetPixel (image, x, y) == fg)
{
wbmp->bitmap[pos] = WBMP_BLACK;
}
pos++;
}
}
/* write the WBMP to a gd file descriptor */
if (writewbmp (wbmp, &gd_putout, out))
fprintf (stderr, "Could not save WBMP\n");
/* des submitted this bugfix: gdFree the memory. */
freewbmp (wbmp);
}
/* gdImageCreateFromWBMPCtx
** ------------------------
** Create a gdImage from a WBMP file input from an gdIOCtx
*/
gdImagePtr
gdImageCreateFromWBMPCtx (gdIOCtx * infile)
{
/* FILE *wbmp_file; */
Wbmp *wbmp;
gdImagePtr im = NULL;
int black, white;
int col, row, pos;
if (readwbmp (&gd_getin, infile, &wbmp))
return (NULL);
if (!(im = gdImageCreate (wbmp->width, wbmp->height)))
{
freewbmp (wbmp);
return (NULL);
}
/* create the background color */
white = gdImageColorAllocate (im, 255, 255, 255);
/* create foreground color */
black = gdImageColorAllocate (im, 0, 0, 0);
/* fill in image (in a wbmp 1 = white/ 0 = black) */
pos = 0;
for (row = 0; row < wbmp->height; row++)
{
for (col = 0; col < wbmp->width; col++)
{
if (wbmp->bitmap[pos++] == WBMP_WHITE)
{
gdImageSetPixel (im, col, row, white);
}
else
{
gdImageSetPixel (im, col, row, black);
}
}
}
freewbmp (wbmp);
return (im);
}
/* gdImageCreateFromWBMP
** ---------------------
*/
gdImagePtr
gdImageCreateFromWBMP (FILE * inFile)
{
gdImagePtr im;
gdIOCtx *in = gdNewFileCtx (inFile);
im = gdImageCreateFromWBMPCtx (in);
in->gd_free (in);
return (im);
}
/* gdImageWBMP
** -----------
*/
void
gdImageWBMP (gdImagePtr im, int fg, FILE * outFile)
{
gdIOCtx *out = gdNewFileCtx (outFile);
gdImageWBMPCtx (im, fg, out);
out->gd_free (out);
}
/* gdImageWBMPPtr
** --------------
*/
void *
gdImageWBMPPtr (gdImagePtr im, int *size, int fg)
{
void *rv;
gdIOCtx *out = gdNewDynamicCtx (2048, NULL);
gdImageWBMPCtx (im, fg, out);
rv = gdDPExtractData (out, size);
out->gd_free (out);
return rv;
}
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