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scottc
1998-09-29 22:36:29 +00:00
commit 9d2e6ef9f1
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/* xpm.c - load XPM image from file
*
* Raster graphics library
*
* Copyright (c) 1997 Alfredo K. Kojima
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <config.h>
#ifdef USE_XPM
#include <X11/Xlib.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <X11/xpm.h>
#include "wraster.h"
RImage*
RGetImageFromXPMData(RContext *context, char **data)
{
Display *dpy = context->dpy;
Colormap cmap = context->cmap;
RImage *image;
XpmImage xpm;
unsigned char *color_table[3];
unsigned char *r, *g, *b, *a;
int *p;
int i;
int transp=-1;
RErrorString[0] = 0;
if (XpmCreateXpmImageFromData(data, &xpm, (XpmInfo *)NULL)!=XpmSuccess) {
sprintf(RErrorString, "error converting XPM data");
return NULL;
}
if (xpm.height<1 || xpm.width < 1) {
sprintf(RErrorString, "can't convert XPM data. Size too weird");
XpmFreeXpmImage(&xpm);
return NULL;
}
if (xpm.colorTable==NULL) {
sprintf(RErrorString, "error converting XPM data");
XpmFreeXpmImage(&xpm);
return NULL;
}
image = RCreateImage(xpm.width, xpm.height, True);
if (!image) {
sprintf(RErrorString, ":could not create RImage");
XpmFreeXpmImage(&xpm);
return NULL;
}
/* make color table */
for (i=0; i<3; i++) {
color_table[i] = malloc(xpm.ncolors*sizeof(char));
if (!color_table[i]) {
for (i=i-1;i>=0; i--) {
if (color_table[i])
free(color_table[i]);
}
RDestroyImage(image);
sprintf(RErrorString, "out of memory while converting XPM data");
XpmFreeXpmImage(&xpm);
return NULL;
}
}
for (i=0; i<xpm.ncolors; i++) {
XColor xcolor;
if (strncmp(xpm.colorTable[i].c_color,"None",4)==0) {
color_table[0][i]=0;
color_table[1][i]=0;
color_table[2][i]=0;
transp = i;
continue;
}
if (XParseColor(dpy, cmap, xpm.colorTable[i].c_color, &xcolor)) {
color_table[0][i] = xcolor.red>>8;
color_table[1][i] = xcolor.green>>8;
color_table[2][i] = xcolor.blue>>8;
} else {
color_table[0][i]=0xbe;
color_table[1][i]=0xbe;
color_table[2][i]=0xbe;
}
}
memset(image->data[3], 255, xpm.width*xpm.height);
/* convert pixmap to RImage */
p = (int*)xpm.data;
r = image->data[0];
g = image->data[1];
b = image->data[2];
a = image->data[3];
for (i=0; i<xpm.width*xpm.height; i++) {
if (*p==transp)
*a=0;
a++;
*(r++)=color_table[0][*p];
*(g++)=color_table[1][*p];
*(b++)=color_table[2][*p];
p++;
}
for(i=0; i<3; i++) {
free(color_table[i]);
}
XpmFreeXpmImage(&xpm);
return image;
}
RImage*
RLoadXPM(RContext *context, char *file, int index)
{
Display *dpy = context->dpy;
Colormap cmap = context->cmap;
RImage *image;
XpmImage xpm;
unsigned char *color_table[3];
unsigned char *r, *g, *b, *a;
int *p;
int i;
int transp=-1;
RErrorString[0] = 0;
if (XpmReadFileToXpmImage(file, &xpm, (XpmInfo *)NULL)!=XpmSuccess) {
sprintf(RErrorString, "error loading XPM file \"%s\"", file);
return NULL;
}
if (xpm.height<1 || xpm.width < 1) {
sprintf(RErrorString, "can't load XPM file \"%s\". Size too weird",
file);
XpmFreeXpmImage(&xpm);
return NULL;
}
if (xpm.colorTable==NULL) {
sprintf(RErrorString, "error loading XPM file \"%s\"", file);
XpmFreeXpmImage(&xpm);
return NULL;
}
image = RCreateImage(xpm.width, xpm.height, True);
if (!image) {
strcat(RErrorString, ":could not create RImage");
XpmFreeXpmImage(&xpm);
return NULL;
}
/* make color table */
for (i=0; i<3; i++) {
color_table[i] = malloc(xpm.ncolors*sizeof(char));
if (!color_table[i]) {
for (i=i-1;i>=0; i--) {
if (color_table[i])
free(color_table[i]);
}
RDestroyImage(image);
sprintf(RErrorString, "out of memory while loading file \"%s\"",
file);
XpmFreeXpmImage(&xpm);
return NULL;
}
}
for (i=0; i<xpm.ncolors; i++) {
XColor xcolor;
if (strncmp(xpm.colorTable[i].c_color,"None",4)==0) {
color_table[0][i]=0;
color_table[1][i]=0;
color_table[2][i]=0;
transp = i;
continue;
}
if (XParseColor(dpy, cmap, xpm.colorTable[i].c_color, &xcolor)) {
color_table[0][i] = xcolor.red>>8;
color_table[1][i] = xcolor.green>>8;
color_table[2][i] = xcolor.blue>>8;
} else {
color_table[0][i]=0xbe;
color_table[1][i]=0xbe;
color_table[2][i]=0xbe;
}
}
memset(image->data[3], 255, xpm.width*xpm.height);
/* convert pixmap to RImage */
p = (int*)xpm.data;
r = image->data[0];
g = image->data[1];
b = image->data[2];
a = image->data[3];
for (i=0; i<xpm.width*xpm.height; i++) {
if (*p==transp)
*a=0;
a++;
*(r++)=color_table[0][*p];
*(g++)=color_table[1][*p];
*(b++)=color_table[2][*p];
p++;
}
for(i=0; i<3; i++) {
free(color_table[i]);
}
XpmFreeXpmImage(&xpm);
return image;
}
#endif /* USE_XPM */