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#include <stdio.h>
#include <math.h>
#include <string.h>
#include <stdlib.h>
#include "gd.h"
#define TRUE 1
#define FALSE 0
/* Exported functions: */
extern void gdImageGd (gdImagePtr im, FILE * out);
/* Use this for commenting out debug-print statements. */
/* Just use the first '#define' to allow all the prints... */
/*#define GD2_DBG(s) (s) */
#define GD2_DBG(s)
/* */
/* Shared code to read color tables from gd file. */
/* */
int
_gdGetColors (gdIOCtx * in, gdImagePtr im, int gd2xFlag)
{
int i;
if (gd2xFlag)
{
if (!gdGetByte (&im->trueColor, in))
{
goto fail1;
}
/* This should have been a word all along */
if (!im->trueColor)
{
if (!gdGetWord (&im->colorsTotal, in))
{
goto fail1;
}
}
/* Int to accommodate truecolor single-color transparency */
if (!gdGetInt (&im->transparent, in))
{
goto fail1;
}
}
else
{
if (!gdGetByte (&im->colorsTotal, in))
{
goto fail1;
}
if (!gdGetWord (&im->transparent, in))
{
goto fail1;
}
if (im->transparent == 257)
{
im->transparent = (-1);
}
}
GD2_DBG (printf ("Pallette had %d colours (T=%d)\n", im->colorsTotal, im->transparent));
for (i = 0; (i < gdMaxColors); i++)
{
if (!gdGetByte (&im->red[i], in))
{
goto fail1;
}
if (!gdGetByte (&im->green[i], in))
{
goto fail1;
}
if (!gdGetByte (&im->blue[i], in))
{
goto fail1;
}
if (gd2xFlag)
{
if (!gdGetByte (&im->alpha[i], in))
{
goto fail1;
}
}
}
for (i = 0; (i < im->colorsTotal); i++)
{
im->open[i] = 0;
};
return TRUE;
fail1:
return FALSE;
}
/* */
/* Use the common basic header info to make the image object. */
/* This is also called from _gd2CreateFromFile */
/* */
static
gdImagePtr
_gdCreateFromFile (gdIOCtx * in, int *sx, int *sy)
{
gdImagePtr im;
int gd2xFlag = 0;
if (!gdGetWord (sx, in))
{
goto fail1;
}
if (*sx == 65535)
{
/* This is a gd 2.0 .gd file */
gd2xFlag = 1;
if (!gdGetWord (sx, in))
{
goto fail1;
}
}
if (!gdGetWord (sy, in))
{
goto fail1;
}
GD2_DBG (printf ("Image is %dx%d\n", *sx, *sy));
im = gdImageCreate (*sx, *sy);
if (!_gdGetColors (in, im, gd2xFlag))
{
goto fail2;
}
return im;
fail2:
gdImageDestroy (im);
fail1:
return 0;
}
gdImagePtr
gdImageCreateFromGd (FILE * inFile)
{
gdImagePtr im;
gdIOCtx *in;
in = gdNewFileCtx (inFile);
im = gdImageCreateFromGdCtx (in);
in->gd_free (in);
return im;
}
gdImagePtr
gdImageCreateFromGdCtx (gdIOCtxPtr in)
{
int sx, sy;
int x, y;
gdImagePtr im;
/* Read the header */
im = _gdCreateFromFile (in, &sx, &sy);
if (im == NULL)
{
goto fail1;
};
/* Then the data... */
for (y = 0; (y < sy); y++)
{
for (x = 0; (x < sx); x++)
{
int ch;
ch = gdGetC (in);
if (ch == EOF)
{
goto fail2;
}
/* ROW-MAJOR IN GD 1.3 */
im->pixels[y][x] = ch;
}
}
return im;
fail2:
gdImageDestroy (im);
fail1:
return 0;
}
void
_gdPutColors (gdImagePtr im, gdIOCtx * out)
{
int i;
gdPutC (im->trueColor, out);
if (!im->trueColor)
{
gdPutWord (im->colorsTotal, out);
}
gdPutInt (im->transparent, out);
if (!im->trueColor)
{
for (i = 0; (i < gdMaxColors); i++)
{
gdPutC ((unsigned char) im->red[i], out);
gdPutC ((unsigned char) im->green[i], out);
gdPutC ((unsigned char) im->blue[i], out);
gdPutC ((unsigned char) im->alpha[i], out);
}
}
}
static
void
_gdPutHeader (gdImagePtr im, gdIOCtx * out)
{
/* 65535 indicates this is a gd 2.x .gd file. */
gdPutWord (65535, out);
gdPutWord (im->sx, out);
gdPutWord (im->sy, out);
_gdPutColors (im, out);
}
static void
_gdImageGd (gdImagePtr im, gdIOCtx * out)
{
int x, y;
_gdPutHeader (im, out);
for (y = 0; (y < im->sy); y++)
{
for (x = 0; (x < im->sx); x++)
{
/* ROW-MAJOR IN GD 1.3 */
if (im->trueColor)
{
gdPutInt (im->tpixels[y][x], out);
}
else
{
gdPutC ((unsigned char) im->pixels[y][x], out);
}
}
}
}
void
gdImageGd (gdImagePtr im, FILE * outFile)
{
gdIOCtx *out = gdNewFileCtx (outFile);
_gdImageGd (im, out);
out->gd_free (out);
}
void *
gdImageGdPtr (gdImagePtr im, int *size)
{
void *rv;
gdIOCtx *out = gdNewDynamicCtx (2048, NULL);
_gdImageGd (im, out);
rv = gdDPExtractData (out, size);
out->gd_free (out);
return rv;
}
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