wrlib/xpm.c

   1 /* xpm.c - load XPM image from file
   2  *
   3  *  Raster graphics library
   4  *
   5  *  Copyright (c) 1997-2002 Alfredo K. Kojima
   6  *
   7  *  This library is free software; you can redistribute it and/or
   8  *  modify it under the terms of the GNU Library General Public
   9  *  License as published by the Free Software Foundation; either
  10  *  version 2 of the License, or (at your option) any later version.
  11  *
  12  *  This library is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  *  Library General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU Library General Public
  18  *  License along with this library; if not, write to the Free
  19  *  Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  20  */
  21
  22 #include <config.h>
  23
  24
  25 #ifdef USE_XPM
  26
  27 #include <X11/Xlib.h>
  28 #include <stdlib.h>
  29 #include <stdio.h>
  30 #include <string.h>
  31 #include <X11/xpm.h>
  32
  33 #include "wraster.h"
  34
  35 RImage*
  36 RGetImageFromXPMData(RContext *context, char **xpmData)
  37 {
  38     Display *dpy = context->dpy;
  39     Colormap cmap = context->cmap;
  40     RImage *image;
  41     XpmImage xpm;
  42     unsigned char *color_table[4];
  43     unsigned char *data;
  44     int *p;
  45     int i;
  46
  47     i = XpmCreateXpmImageFromData(xpmData, &xpm, (XpmInfo *)NULL);
  48     if (i!=XpmSuccess) {
  49         switch (i) {
  50          case XpmOpenFailed:
  51             RErrorCode = RERR_OPEN;
  52             break;
  53          case XpmFileInvalid:
  54             RErrorCode = RERR_BADIMAGEFILE;
  55             break;
  56          case XpmNoMemory:
  57             RErrorCode = RERR_NOMEMORY;
  58             break;
  59          default:
  60             RErrorCode = RERR_BADIMAGEFILE;
  61             break;
  62         }
  63         return NULL;
  64     }
  65     if (xpm.height<1 || xpm.width < 1) {
  66         RErrorCode = RERR_BADIMAGEFILE;
  67         XpmFreeXpmImage(&xpm);
  68         return NULL;
  69     }
  70
  71     if (xpm.colorTable==NULL) {
  72         RErrorCode = RERR_BADIMAGEFILE;
  73         XpmFreeXpmImage(&xpm);
  74         return NULL;
  75     }
  76     image = RCreateImage(xpm.width, xpm.height, True);
  77     if (!image) {
  78         XpmFreeXpmImage(&xpm);
  79         return NULL;
  80     }
  81
  82     /* make color table */
  83     for (i=0; i<4; i++) {
  84         color_table[i] = malloc(xpm.ncolors*sizeof(char));
  85         if (!color_table[i]) {
  86             for (i=i-1;i>=0; i--) {
  87                 if (color_table[i])
  88                   free(color_table[i]);
  89             }
  90             RReleaseImage(image);
  91             RErrorCode = RERR_NOMEMORY;
  92             XpmFreeXpmImage(&xpm);
  93             return NULL;
  94         }
  95     }
  96
  97     for (i=0; i<xpm.ncolors; i++) {
  98         XColor xcolor;
  99         char * color = NULL;
 100
 101         if (xpm.colorTable[i].c_color)
 102              color = xpm.colorTable[i].c_color;
 103         else if (xpm.colorTable[i].g_color)
 104              color = xpm.colorTable[i].g_color;
 105         else if (xpm.colorTable[i].g4_color)
 106              color = xpm.colorTable[i].g4_color;
 107         else if (xpm.colorTable[i].m_color)
 108              color = xpm.colorTable[i].m_color;
 109         else if (xpm.colorTable[i].symbolic)
 110              color = xpm.colorTable[i].symbolic;
 111
 112         if (!color) {
 113             color_table[0][i] = 0xbe;
 114             color_table[1][i] = 0xbe;
 115             color_table[2][i] = 0xbe;
 116             color_table[3][i] = 0xff;
 117             continue;
 118         }
 119
 120         if (strncmp(color,"None",4)==0) {
 121             color_table[0][i]=0;
 122             color_table[1][i]=0;
 123             color_table[2][i]=0;
 124             color_table[3][i]=0;
 125             continue;
 126         }
 127         if (XParseColor(dpy, cmap, color, &xcolor)) {
 128             color_table[0][i] = xcolor.red>>8;
 129             color_table[1][i] = xcolor.green>>8;
 130             color_table[2][i] = xcolor.blue>>8;
 131             color_table[3][i] = 0xff;
 132         } else {
 133             color_table[0][i] = 0xbe;
 134             color_table[1][i] = 0xbe;
 135             color_table[2][i] = 0xbe;
 136             color_table[3][i] = 0xff;
 137         }
 138     }
 139     /* convert pixmap to RImage */
 140     p = (int*)xpm.data;
 141     data = image->data;
 142     for (i=0; i<xpm.width*xpm.height; i++) {
 143         *(data++)=color_table[0][*p];
 144         *(data++)=color_table[1][*p];
 145         *(data++)=color_table[2][*p];
 146         *(data++)=color_table[3][*p];
 147         p++;
 148     }
 149     for(i=0; i<4; i++) {
 150         free(color_table[i]);
 151     }
 152     XpmFreeXpmImage(&xpm);
 153     return image;
 154 }
 155
 156
 157
 158 RImage*
 159 RLoadXPM(RContext *context, char *file, int index)
 160 {
 161     Display *dpy = context->dpy;
 162     Colormap cmap = context->cmap;
 163     RImage *image;
 164     XpmImage xpm;
 165     unsigned char *color_table[4];
 166     unsigned char *data;
 167     int *p;
 168     int i;
 169
 170     i = XpmReadFileToXpmImage(file, &xpm, (XpmInfo *)NULL);
 171     if (i!=XpmSuccess) {
 172         switch (i) {
 173          case XpmOpenFailed:
 174             RErrorCode = RERR_OPEN;
 175             break;
 176          case XpmFileInvalid:
 177             RErrorCode = RERR_BADIMAGEFILE;
 178             break;
 179          case XpmNoMemory:
 180             RErrorCode = RERR_NOMEMORY;
 181             break;
 182          default:
 183             RErrorCode = RERR_BADIMAGEFILE;
 184             break;
 185         }
 186         return NULL;
 187     }
 188     if (xpm.height<1 || xpm.width < 1) {
 189         RErrorCode = RERR_BADIMAGEFILE;
 190         XpmFreeXpmImage(&xpm);
 191         return NULL;
 192     }
 193
 194     if (xpm.colorTable==NULL) {
 195         RErrorCode = RERR_BADIMAGEFILE;
 196         XpmFreeXpmImage(&xpm);
 197         return NULL;
 198     }
 199     image = RCreateImage(xpm.width, xpm.height, True);
 200     if (!image) {
 201         XpmFreeXpmImage(&xpm);
 202         return NULL;
 203     }
 204
 205     /* make color table */
 206     for (i=0; i<4; i++) {
 207         color_table[i] = malloc(xpm.ncolors*sizeof(char));
 208         if (!color_table[i]) {
 209             for (i=i-1;i>=0; i--) {
 210                 if (color_table[i])
 211                   free(color_table[i]);
 212             }
 213             RReleaseImage(image);
 214             RErrorCode = RERR_NOMEMORY;
 215             XpmFreeXpmImage(&xpm);
 216             return NULL;
 217         }
 218     }
 219
 220     for (i=0; i<xpm.ncolors; i++) {
 221         XColor xcolor;
 222         char * color = NULL;
 223
 224         if (xpm.colorTable[i].c_color)
 225              color = xpm.colorTable[i].c_color;
 226         else if (xpm.colorTable[i].g_color)
 227              color = xpm.colorTable[i].g_color;
 228         else if (xpm.colorTable[i].g4_color)
 229              color = xpm.colorTable[i].g4_color;
 230         else if (xpm.colorTable[i].m_color)
 231              color = xpm.colorTable[i].m_color;
 232         else if (xpm.colorTable[i].symbolic)
 233              color = xpm.colorTable[i].symbolic;
 234
 235         if (!color) {
 236             color_table[0][i] = 0xbe;
 237             color_table[1][i] = 0xbe;
 238             color_table[2][i] = 0xbe;
 239             color_table[3][i] = 0xff;
 240             continue;
 241         }
 242
 243         if (strncmp(color,"None",4)==0) {
 244             color_table[0][i]=0;
 245             color_table[1][i]=0;
 246             color_table[2][i]=0;
 247             color_table[3][i]=0;
 248             continue;
 249         }
 250         if (XParseColor(dpy, cmap, color, &xcolor)) {
 251             color_table[0][i] = xcolor.red>>8;
 252             color_table[1][i] = xcolor.green>>8;
 253             color_table[2][i] = xcolor.blue>>8;
 254             color_table[3][i] = 0xff;
 255         } else {
 256             color_table[0][i] = 0xbe;
 257             color_table[1][i] = 0xbe;
 258             color_table[2][i] = 0xbe;
 259             color_table[3][i] = 0xff;
 260         }
 261     }
 262     /* convert pixmap to RImage */
 263     p = (int*)xpm.data;
 264     data = image->data;
 265     for (i=0; i<xpm.width*xpm.height; i++, p++) {
 266         *(data++)=color_table[0][*p];
 267         *(data++)=color_table[1][*p];
 268         *(data++)=color_table[2][*p];
 269         *(data++)=color_table[3][*p];
 270     }
 271     for(i=0; i<4; i++) {
 272         free(color_table[i]);
 273     }
 274     XpmFreeXpmImage(&xpm);
 275     return image;
 276 }
 277
 278 #endif /* USE_XPM */