root/libgd/gdxpm.c

DEFINITIONS

1. gdImageCreateFromXpm

/*
   add ability to load xpm files to gd, requires the xpm
   library.
   Caolan.McNamara@ul.ie
   http://www.csn.ul.ie/~caolan
 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "gd.h"
#include "gdhelpers.h"

#ifdef HAVE_XPM

#include <X11/xpm.h>

gdImagePtr gdImageCreateFromXpm (char *filename)
{
        XpmInfo info;
        XpmImage image;
        int i, j, k, number;
        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;
        }

        if (!(im = gdImageCreate(image.width, image.height))) {
                goto done;
        }

        number = image.ncolors;
        colors = (int *) safe_emalloc(number, sizeof(int), 0);
        for (i = 0; i < number; i++) {
                switch (strlen (image.colorTable[i].c_color)) {
                        case 4:
                                buf[1] = '\0';
                                buf[0] = image.colorTable[i].c_color[1];
                                red = strtol(buf, NULL, 16);

                                buf[0] = image.colorTable[i].c_color[2];
                                green = strtol(buf, NULL, 16);

                                buf[0] = image.colorTable[i].c_color[3];
                                blue = strtol(buf, NULL, 16);
                                break;

                        case 7:
                                buf[2] = '\0';
                                buf[0] = image.colorTable[i].c_color[1];
                                buf[1] = image.colorTable[i].c_color[2];
                                red = strtol(buf, NULL, 16);

                                buf[0] = image.colorTable[i].c_color[3];
                                buf[1] = image.colorTable[i].c_color[4];
                                green = strtol(buf, NULL, 16);

                                buf[0] = image.colorTable[i].c_color[5];
                                buf[1] = image.colorTable[i].c_color[6];
                                blue = strtol(buf, NULL, 16);
                                break;

                        case 10:
                                buf[3] = '\0';
                                buf[0] = image.colorTable[i].c_color[1];
                                buf[1] = image.colorTable[i].c_color[2];
                                buf[2] = image.colorTable[i].c_color[3];
                                red = strtol(buf, NULL, 16);
                                red /= 64;

                                buf[0] = image.colorTable[i].c_color[4];
                                buf[1] = image.colorTable[i].c_color[5];
                                buf[2] = image.colorTable[i].c_color[6];
                                green = strtol(buf, NULL, 16);
                                green /= 64;

                                buf[0] = image.colorTable[i].c_color[7];
                                buf[1] = image.colorTable[i].c_color[8];
                                buf[2] = image.colorTable[i].c_color[9];
                                blue = strtol(buf, NULL, 16);
                                blue /= 64;
                                break;

                        case 13:
                                buf[4] = '\0';
                                buf[0] = image.colorTable[i].c_color[1];
                                buf[1] = image.colorTable[i].c_color[2];
                                buf[2] = image.colorTable[i].c_color[3];
                                buf[3] = image.colorTable[i].c_color[4];
                                red = strtol(buf, NULL, 16);
                                red /= 256;

                                buf[0] = image.colorTable[i].c_color[5];
                                buf[1] = image.colorTable[i].c_color[6];
                                buf[2] = image.colorTable[i].c_color[7];
                                buf[3] = image.colorTable[i].c_color[8];
                                green = strtol(buf, NULL, 16);
                                green /= 256;

                                buf[0] = image.colorTable[i].c_color[9];
                                buf[1] = image.colorTable[i].c_color[10];
                                buf[2] = image.colorTable[i].c_color[11];
                                buf[3] = image.colorTable[i].c_color[12];
                                blue = strtol(buf, NULL, 16);
                                blue /= 256;
                                break;
                }


                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