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/*
* Add ability to load xpm files to gd, requires the xpm
* library.
* Caolan.McNamara@ul.ie
* http://www.csn.ul.ie/~caolan
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gd.h"
#include "gdhelpers.h"
#include "gd_color_map.h"
#include "gd_errors.h"
#ifndef HAVE_LIBXPM
BGD_DECLARE(gdImagePtr) gdImageCreateFromXpm(char *filename)
{
(void)filename;
gd_error_ex(GD_ERROR, "libgd was not built with xpm support\n");
return NULL;
}
#else
#include <X11/xpm.h>
BGD_DECLARE(gdImagePtr) gdImageCreateFromXpm(char *filename)
{
XpmInfo info;
XpmImage image;
unsigned int i, j, k, number, len;
char buf[5];
gdImagePtr im = 0;
int *pointer;
int red = 0, green = 0, blue = 0;
int *colors;
int ret;
ret = XpmReadFileToXpmImage(filename, &image, &info);
if(ret != XpmSuccess) {
return 0;
}
number = image.ncolors;
if(overflow2(sizeof(int), number)) {
goto done;
}
for(i = 0; i < number; i++) {
/*
avoid NULL pointer dereference
TODO better fix need to manage monochrome/monovisual
see m_color or g4_color or g_color
*/
if (!image.colorTable[i].c_color) {
goto done;
}
}
colors = (int *)gdMalloc(sizeof(int) * number);
if(colors == NULL) {
goto done;
}
if(!(im = gdImageCreate(image.width, image.height))) {
gdFree(colors);
goto done;
}
for(i = 0; i < number; i++) {
char *c_color = image.colorTable[i].c_color;
if(strcmp(c_color, "None") == 0) {
colors[i] = gdImageGetTransparent(im);
if(colors[i] == -1) colors[i] = gdImageColorAllocate(im, 0, 0, 0);
if(colors[i] != -1) gdImageColorTransparent(im, colors[i]);
continue;
}
len = strlen(c_color);
if(len < 1) continue;
if(c_color[0] == '#') {
switch(len) {
case 4:
buf[2] = '\0';
buf[0] = buf[1] = c_color[1];
red = strtol(buf, NULL, 16);
buf[0] = buf[1] = c_color[2];
green = strtol(buf, NULL, 16);
buf[0] = buf[1] = c_color[3];
blue = strtol(buf, NULL, 16);
break;
case 7:
buf[2] = '\0';
buf[0] = c_color[1];
buf[1] = c_color[2];
red = strtol(buf, NULL, 16);
buf[0] = c_color[3];
buf[1] = c_color[4];
green = strtol(buf, NULL, 16);
buf[0] = c_color[5];
buf[1] = c_color[6];
blue = strtol(buf, NULL, 16);
break;
case 10:
buf[3] = '\0';
buf[0] = c_color[1];
buf[1] = c_color[2];
buf[2] = c_color[3];
red = strtol(buf, NULL, 16);
red /= 64;
buf[0] = c_color[4];
buf[1] = c_color[5];
buf[2] = c_color[6];
green = strtol(buf, NULL, 16);
green /= 64;
buf[0] = c_color[7];
buf[1] = c_color[8];
buf[2] = c_color[9];
blue = strtol(buf, NULL, 16);
blue /= 64;
break;
case 13:
buf[4] = '\0';
buf[0] = c_color[1];
buf[1] = c_color[2];
buf[2] = c_color[3];
buf[3] = c_color[4];
red = strtol(buf, NULL, 16);
red /= 256;
buf[0] = c_color[5];
buf[1] = c_color[6];
buf[2] = c_color[7];
buf[3] = c_color[8];
green = strtol(buf, NULL, 16);
green /= 256;
buf[0] = c_color[9];
buf[1] = c_color[10];
buf[2] = c_color[11];
buf[3] = c_color[12];
blue = strtol(buf, NULL, 16);
blue /= 256;
break;
}
} else if(!gdColorMapLookup(GD_COLOR_MAP_X11, c_color, &red, &green, &blue)) {
continue;
}
colors[i] = gdImageColorResolve(im, red, green, blue);
}
pointer = (int *)image.data;
for(i = 0; i < image.height; i++) {
for(j = 0; j < image.width; j++) {
k = *pointer++;
gdImageSetPixel(im, j, i, colors[k]);
}
}
gdFree(colors);
done:
XpmFreeXpmImage(&image);
XpmFreeXpmInfo(&info);
return im;
}
#endif /* HAVE_LIBXPM */
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