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135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
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/*
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add ability to load xpm files to gd, requires the xpm
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library.
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Caolan.McNamara@ul.ie
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http://www.csn.ul.ie/~caolan
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "gd.h"
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#include "gdhelpers.h"
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#ifdef HAVE_XPM
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#include <X11/xpm.h>
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gdImagePtr gdImageCreateFromXpm (char *filename)
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{
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XpmInfo info;
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XpmImage image;
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int i, j, k, number;
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char buf[5];
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gdImagePtr im = 0;
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int *pointer;
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int red = 0, green = 0, blue = 0;
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int *colors;
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int ret;
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ret = XpmReadFileToXpmImage(filename, &image, &info);
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if (ret != XpmSuccess) {
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return 0;
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}
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if (!(im = gdImageCreate(image.width, image.height))) {
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goto done;
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}
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number = image.ncolors;
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colors = (int *) safe_emalloc(number, sizeof(int), 0);
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for (i = 0; i < number; i++) {
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switch (strlen (image.colorTable[i].c_color)) {
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case 4:
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buf[1] = '\0';
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buf[0] = image.colorTable[i].c_color[1];
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red = strtol(buf, NULL, 16);
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buf[0] = image.colorTable[i].c_color[2];
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green = strtol(buf, NULL, 16);
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buf[0] = image.colorTable[i].c_color[3];
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blue = strtol(buf, NULL, 16);
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break;
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case 7:
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buf[2] = '\0';
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buf[0] = image.colorTable[i].c_color[1];
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buf[1] = image.colorTable[i].c_color[2];
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red = strtol(buf, NULL, 16);
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buf[0] = image.colorTable[i].c_color[3];
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buf[1] = image.colorTable[i].c_color[4];
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green = strtol(buf, NULL, 16);
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buf[0] = image.colorTable[i].c_color[5];
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buf[1] = image.colorTable[i].c_color[6];
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blue = strtol(buf, NULL, 16);
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break;
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case 10:
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buf[3] = '\0';
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buf[0] = image.colorTable[i].c_color[1];
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buf[1] = image.colorTable[i].c_color[2];
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buf[2] = image.colorTable[i].c_color[3];
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red = strtol(buf, NULL, 16);
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red /= 64;
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buf[0] = image.colorTable[i].c_color[4];
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buf[1] = image.colorTable[i].c_color[5];
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buf[2] = image.colorTable[i].c_color[6];
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green = strtol(buf, NULL, 16);
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green /= 64;
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buf[0] = image.colorTable[i].c_color[7];
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buf[1] = image.colorTable[i].c_color[8];
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buf[2] = image.colorTable[i].c_color[9];
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blue = strtol(buf, NULL, 16);
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blue /= 64;
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break;
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case 13:
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buf[4] = '\0';
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buf[0] = image.colorTable[i].c_color[1];
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buf[1] = image.colorTable[i].c_color[2];
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buf[2] = image.colorTable[i].c_color[3];
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buf[3] = image.colorTable[i].c_color[4];
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red = strtol(buf, NULL, 16);
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red /= 256;
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buf[0] = image.colorTable[i].c_color[5];
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buf[1] = image.colorTable[i].c_color[6];
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buf[2] = image.colorTable[i].c_color[7];
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buf[3] = image.colorTable[i].c_color[8];
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green = strtol(buf, NULL, 16);
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green /= 256;
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buf[0] = image.colorTable[i].c_color[9];
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buf[1] = image.colorTable[i].c_color[10];
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buf[2] = image.colorTable[i].c_color[11];
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buf[3] = image.colorTable[i].c_color[12];
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blue = strtol(buf, NULL, 16);
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blue /= 256;
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break;
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}
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colors[i] = gdImageColorResolve(im, red, green, blue);
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}
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pointer = (int *) image.data;
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for (i = 0; i < image.height; i++) {
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for (j = 0; j < image.width; j++) {
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k = *pointer++;
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gdImageSetPixel(im, j, i, colors[k]);
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}
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}
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gdFree(colors);
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done:
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XpmFreeXpmImage(&image);
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XpmFreeXpmInfo(&info);
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return im;
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}
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#endif
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