root/gd/libgd/gd_wbmp.c

DEFINITIONS

1. gd_putout
2. gd_getin
3. gdImageWBMPCtx
4. gdImageCreateFromWBMPCtx
5. gdImageCreateFromWBMP
6. gdImageCreateFromWBMPPtr
7. gdImageWBMP
8. gdImageWBMPPtr

/*
   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(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) {
                php_gd_error("Could not create WBMP");
        }

        /* 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)) {
                php_gd_error("Could not save WBMP");
        }
        /* 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;
}

gdImagePtr gdImageCreateFromWBMPPtr (int size, void *data)
{
        gdImagePtr im;
        gdIOCtx *in = gdNewDynamicCtxEx(size, data, 0);
        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;
}