wrlib/load_xpm.c

   1 /* xpm.c - load XPM image from file using libXpm
   2  *
   3  * Raster graphics library
   4  *
   5  * Copyright (c) 1997-2003 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., 51 Franklin St, Fifth Floor, Boston,
  20  *  MA 02110-1301, USA.
  21  */
  22
  23 #include <config.h>
  24
  25 #include <X11/Xlib.h>
  26 #include <stdlib.h>
  27 #include <stdio.h>
  28 #include <string.h>
  29 #include <X11/xpm.h>
  30
  31 #include "wraster.h"
  32 #include "imgformat.h"
  33
  34 RImage *RGetImageFromXPMData(RContext * context, char **xpmData)
  35 {
  36         Display *dpy = context->dpy;
  37         Colormap cmap = context->cmap;
  38         RImage *image;
  39         XpmImage xpm;
  40         unsigned char *color_table[4];
  41         unsigned char *data;
  42         int *p;
  43         int i;
  44
  45         i = XpmCreateXpmImageFromData(xpmData, &xpm, (XpmInfo *) NULL);
  46         if (i != XpmSuccess) {
  47                 switch (i) {
  48                 case XpmOpenFailed:
  49                         RErrorCode = RERR_OPEN;
  50                         break;
  51                 case XpmFileInvalid:
  52                         RErrorCode = RERR_BADIMAGEFILE;
  53                         break;
  54                 case XpmNoMemory:
  55                         RErrorCode = RERR_NOMEMORY;
  56                         break;
  57                 default:
  58                         RErrorCode = RERR_BADIMAGEFILE;
  59                         break;
  60                 }
  61                 return NULL;
  62         }
  63         if (xpm.height < 1 || xpm.width < 1) {
  64                 RErrorCode = RERR_BADIMAGEFILE;
  65                 XpmFreeXpmImage(&xpm);
  66                 return NULL;
  67         }
  68
  69         if (xpm.colorTable == NULL) {
  70                 RErrorCode = RERR_BADIMAGEFILE;
  71                 XpmFreeXpmImage(&xpm);
  72                 return NULL;
  73         }
  74         image = RCreateImage(xpm.width, xpm.height, True);
  75         if (!image) {
  76                 XpmFreeXpmImage(&xpm);
  77                 return NULL;
  78         }
  79
  80         /* make color table */
  81         for (i = 0; i < 4; i++) {
  82                 color_table[i] = malloc(xpm.ncolors * sizeof(unsigned char));
  83                 if (!color_table[i]) {
  84                         for (i = i - 1; i >= 0; i--) {
  85                                 if (color_table[i])
  86                                         free(color_table[i]);
  87                         }
  88                         RReleaseImage(image);
  89                         RErrorCode = RERR_NOMEMORY;
  90                         XpmFreeXpmImage(&xpm);
  91                         return NULL;
  92                 }
  93         }
  94
  95         for (i = 0; i < xpm.ncolors; i++) {
  96                 XColor xcolor;
  97                 char *color = NULL;
  98
  99                 if (xpm.colorTable[i].c_color)
 100                         color = xpm.colorTable[i].c_color;
 101                 else if (xpm.colorTable[i].g_color)
 102                         color = xpm.colorTable[i].g_color;
 103                 else if (xpm.colorTable[i].g4_color)
 104                         color = xpm.colorTable[i].g4_color;
 105                 else if (xpm.colorTable[i].m_color)
 106                         color = xpm.colorTable[i].m_color;
 107                 else if (xpm.colorTable[i].symbolic)
 108                         color = xpm.colorTable[i].symbolic;
 109
 110                 if (!color) {
 111                         color_table[0][i] = 0xbe;
 112                         color_table[1][i] = 0xbe;
 113                         color_table[2][i] = 0xbe;
 114                         color_table[3][i] = 0xff;
 115                         continue;
 116                 }
 117
 118                 if (strncmp(color, "None", 4) == 0) {
 119                         color_table[0][i] = 0;
 120                         color_table[1][i] = 0;
 121                         color_table[2][i] = 0;
 122                         color_table[3][i] = 0;
 123                         continue;
 124                 }
 125                 if (XParseColor(dpy, cmap, color, &xcolor)) {
 126                         color_table[0][i] = xcolor.red >> 8;
 127                         color_table[1][i] = xcolor.green >> 8;
 128                         color_table[2][i] = xcolor.blue >> 8;
 129                         color_table[3][i] = 0xff;
 130                 } else {
 131                         color_table[0][i] = 0xbe;
 132                         color_table[1][i] = 0xbe;
 133                         color_table[2][i] = 0xbe;
 134                         color_table[3][i] = 0xff;
 135                 }
 136         }
 137         /* convert pixmap to RImage */
 138         p = (int *)xpm.data;
 139         data = image->data;
 140         for (i = 0; i < xpm.width * xpm.height; i++) {
 141                 *(data++) = color_table[0][*p];
 142                 *(data++) = color_table[1][*p];
 143                 *(data++) = color_table[2][*p];
 144                 *(data++) = color_table[3][*p];
 145                 p++;
 146         }
 147         for (i = 0; i < 4; i++) {
 148                 free(color_table[i]);
 149         }
 150         XpmFreeXpmImage(&xpm);
 151         return image;
 152 }
 153
 154 RImage *RLoadXPM(RContext * context, const char *file)
 155 {
 156         Display *dpy = context->dpy;
 157         Colormap cmap = context->cmap;
 158         RImage *image;
 159         XpmImage xpm;
 160         unsigned char *color_table[4];
 161         unsigned char *data;
 162         int *p;
 163         int i;
 164
 165         i = XpmReadFileToXpmImage((char *)file, &xpm, (XpmInfo *) NULL);
 166         if (i != XpmSuccess) {
 167                 switch (i) {
 168                 case XpmOpenFailed:
 169                         RErrorCode = RERR_OPEN;
 170                         break;
 171                 case XpmFileInvalid:
 172                         RErrorCode = RERR_BADIMAGEFILE;
 173                         break;
 174                 case XpmNoMemory:
 175                         RErrorCode = RERR_NOMEMORY;
 176                         break;
 177                 default:
 178                         RErrorCode = RERR_BADIMAGEFILE;
 179                         break;
 180                 }
 181                 return NULL;
 182         }
 183         if (xpm.height < 1 || xpm.width < 1) {
 184                 RErrorCode = RERR_BADIMAGEFILE;
 185                 XpmFreeXpmImage(&xpm);
 186                 return NULL;
 187         }
 188
 189         if (xpm.colorTable == NULL) {
 190                 RErrorCode = RERR_BADIMAGEFILE;
 191                 XpmFreeXpmImage(&xpm);
 192                 return NULL;
 193         }
 194         image = RCreateImage(xpm.width, xpm.height, True);
 195         if (!image) {
 196                 XpmFreeXpmImage(&xpm);
 197                 return NULL;
 198         }
 199
 200         /* make color table */
 201         for (i = 0; i < 4; i++) {
 202                 color_table[i] = malloc(xpm.ncolors * sizeof(unsigned char));
 203                 if (!color_table[i]) {
 204                         for (i = i - 1; i >= 0; i--) {
 205                                 if (color_table[i])
 206                                         free(color_table[i]);
 207                         }
 208                         RReleaseImage(image);
 209                         RErrorCode = RERR_NOMEMORY;
 210                         XpmFreeXpmImage(&xpm);
 211                         return NULL;
 212                 }
 213         }
 214
 215         for (i = 0; i < xpm.ncolors; i++) {
 216                 XColor xcolor;
 217                 char *color = NULL;
 218
 219                 if (xpm.colorTable[i].c_color)
 220                         color = xpm.colorTable[i].c_color;
 221                 else if (xpm.colorTable[i].g_color)
 222                         color = xpm.colorTable[i].g_color;
 223                 else if (xpm.colorTable[i].g4_color)
 224                         color = xpm.colorTable[i].g4_color;
 225                 else if (xpm.colorTable[i].m_color)
 226                         color = xpm.colorTable[i].m_color;
 227                 else if (xpm.colorTable[i].symbolic)
 228                         color = xpm.colorTable[i].symbolic;
 229
 230                 if (!color) {
 231                         color_table[0][i] = 0xbe;
 232                         color_table[1][i] = 0xbe;
 233                         color_table[2][i] = 0xbe;
 234                         color_table[3][i] = 0xff;
 235                         continue;
 236                 }
 237
 238                 if (strncmp(color, "None", 4) == 0) {
 239                         color_table[0][i] = 0;
 240                         color_table[1][i] = 0;
 241                         color_table[2][i] = 0;
 242                         color_table[3][i] = 0;
 243                         continue;
 244                 }
 245                 if (XParseColor(dpy, cmap, color, &xcolor)) {
 246                         color_table[0][i] = xcolor.red >> 8;
 247                         color_table[1][i] = xcolor.green >> 8;
 248                         color_table[2][i] = xcolor.blue >> 8;
 249                         color_table[3][i] = 0xff;
 250                 } else {
 251                         color_table[0][i] = 0xbe;
 252                         color_table[1][i] = 0xbe;
 253                         color_table[2][i] = 0xbe;
 254                         color_table[3][i] = 0xff;
 255                 }
 256         }
 257         /* convert pixmap to RImage */
 258         p = (int *)xpm.data;
 259         data = image->data;
 260         for (i = 0; i < xpm.width * xpm.height; i++, p++) {
 261                 *(data++) = color_table[0][*p];
 262                 *(data++) = color_table[1][*p];
 263                 *(data++) = color_table[2][*p];
 264                 *(data++) = color_table[3][*p];
 265         }
 266         for (i = 0; i < 4; i++) {
 267                 free(color_table[i]);
 268         }
 269         XpmFreeXpmImage(&xpm);
 270         return image;
 271 }