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/* Copyright (C) 2000-2011 by George Williams */
/*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "gimage.h"
GImage *GImageReadXbm(char * filename) {
FILE *file;
int width, height;
GImage *gi = NULL;
struct _GImage *base;
int i,j,k,pixels,val,val2, ch;
uint8 *scanline;
file = fopen(filename,"r");
if ( file==NULL )
return NULL;
if ( fscanf(file, "#define %*s %d\n", &width )!=1 )
goto bad;
if ( fscanf(file, "#define %*s %d\n", &height )!=1 )
goto bad;
if ( (ch = getc(file))=='#' ) {
fscanf(file, "define %*s %*d\n" ); /* x hotspot */
fscanf(file, "#define %*s %*d\n" ); /* y hotspot */
} else
ungetc(ch,file);
fscanf(file,"static ");
ungetc(ch=fgetc(file),file);
if ( ch=='u' )
fscanf(file,"unsigned ");
ch = ch; /* Compiler bug work-arround */
fscanf(file,"char %*s = {");
gi = GImageCreate(it_mono,width,height);
base = gi->u.image;
for ( i=0; i<height; ++i ) {
scanline = base->data + i*base->bytes_per_line;
for ( j=0; j<base->bytes_per_line; ++j ) {
fscanf(file," 0x%x",(unsigned *) &pixels);
val = pixels; val2=0;
for ( k=0; k<8 ; ++k ) {
if ( (val&(1<<k)) )
val2 |= (0x80>>k);
}
*scanline++ = val2^0xff; /* I default black the other way */
fscanf(file,",");
}
}
fclose(file);
return(gi);
bad:
if ( gi!=NULL )
GImageDestroy(gi);
if ( file!=NULL )
fclose(file);
return(NULL);
}
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