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#if !defined( lint ) && !defined( SABER )
static const char sccsid[] = "@(#)ras.c 4.00 97/01/01 xlockmore";
#endif
/*-
* Utilities for Sun rasterfile processing
*
* Copyright (c) 1995 by Tobias Gloth
*
* See xlock.c for copying information.
*
* Revision History:
* 5-Apr-06: Correction for TrueColor.
* 3-Mar-96: Added random image selection.
* 12-Dec-95: Modified to be a used in more than one mode
* <joukj@hrem.stm.tudelft.nl>
* 22-May-95: Written.
*/
#include "xlock.h"
#include "iostuff.h"
#include "ras.h"
#include <time.h>
XLockImage xlockimage;
static unsigned long get_long(int n);
static void
analyze_header(void)
{
xlockimage.sign = get_long(0);
xlockimage.width = get_long(1);
xlockimage.height = get_long(2);
xlockimage.depth = get_long(3);
xlockimage.colors = get_long(7) / 3;
}
static unsigned long
get_long(int n)
{
return
(((unsigned long) xlockimage.header[4 * n + 0]) << 24) +
(((unsigned long) xlockimage.header[4 * n + 1]) << 16) +
(((unsigned long) xlockimage.header[4 * n + 2]) << 8) +
(((unsigned long) xlockimage.header[4 * n + 3]) << 0);
}
int
RasterFileToImage(ModeInfo * mi, char *filename, XImage ** image ,
Colormap m_cmap )
{
int read_width , depth , format , i;
FILE *file;
unsigned char* rasdata;
unsigned char* tmpdata;
unsigned long black, white, fgpix, bgpix;
XColor fgcol, bgcol;
unsigned long* pixel_num;
int x , y;
if ((file = my_fopen(filename, "r")) == NULL) {
/*(void) fprintf(stderr, "could not read file \"%s\"\n", filename); */
return RasterOpenFailed;
}
(void) fread((void *) xlockimage.header, 8, 4, file);
analyze_header();
if (xlockimage.sign != 0x59a66a95) {
/* not a raster file */
(void) fclose(file);
return RasterFileInvalid;
}
if (xlockimage.depth != 8) {
(void) fclose(file);
(void) fprintf(stderr, "only 8-bit Raster files are supported\n");
return RasterColorFailed;
}
read_width = (int) xlockimage.width;
if ((xlockimage.width & 1) != 0)
read_width++;
depth = MI_DEPTH(mi);
rasdata = (unsigned char *) malloc((int) (read_width * xlockimage.height));
if ( depth < 9 )
xlockimage.data = (unsigned char *) malloc((int) ( read_width *
xlockimage.height));
else
xlockimage.data = (unsigned char *) malloc((int) ( read_width *
xlockimage.height *
4 ));
if (!xlockimage.data) {
(void) fclose(file);
(void) fprintf(stderr, "out of memory for Raster file\n");
return RasterNoMemory;
}
format=(depth == 1) ? XYBitmap : ZPixmap;
if ( MI_IS_VERBOSE( mi ) )
(void) printf ( "XCreateImage depth = %d\n", depth );
if ( depth < 9 )
*image = XCreateImage( MI_DISPLAY(mi), MI_VISUAL(mi), depth, format, 0,
(char *) xlockimage.data, (int) xlockimage.width,
(int) xlockimage.height, 16, (int) xlockimage.width );
else
*image = XCreateImage( MI_DISPLAY(mi), MI_VISUAL(mi), depth, format, 0,
(char *) xlockimage.data, (int) xlockimage.width,
(int) xlockimage.height, 16, (int) xlockimage.width*4 );
if (!*image) {
(void) fclose(file);
(void) fprintf(stderr, "could not create image from Raster file\n");
return RasterColorError;
}
(void) fread((void *) xlockimage.color, (int) xlockimage.colors, 3, file);
(void) fread((void *) rasdata, read_width, (int) xlockimage.height, file);
(void) fclose(file);
/*set up colourmap */
black = MI_BLACK_PIXEL(mi);
white = MI_WHITE_PIXEL(mi);
fgpix = MI_FG_PIXEL(mi);
bgpix = MI_BG_PIXEL(mi);
fgcol.pixel = fgpix;
bgcol.pixel = bgpix;
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &fgcol);
XQueryColor(MI_DISPLAY(mi), MI_COLORMAP(mi), &bgcol);
/* Set these, if Image does not overwrite some, so much the better. */
if (fgpix < COLORMAP_SIZE) {
xlockimage.color[fgpix] = fgcol.red >> 8;
xlockimage.color[fgpix+xlockimage.colors] = fgcol.green >> 8;
xlockimage.color[fgpix+2*xlockimage.colors] = fgcol.blue >> 8;
}
if (bgpix < COLORMAP_SIZE) {
xlockimage.color[bgpix] = bgcol.red >> 8;
xlockimage.color[bgpix+xlockimage.colors] = bgcol.green >> 8;
xlockimage.color[bgpix+2*xlockimage.colors] = bgcol.blue >> 8;
}
if (white < COLORMAP_SIZE) {
xlockimage.color[white] = 0xFF;
xlockimage.color[white+xlockimage.colors] = 0xFF;
xlockimage.color[white+2*xlockimage.colors] = 0xFF;
}
if (black < COLORMAP_SIZE) {
xlockimage.color[black] = 0;
xlockimage.color[black+xlockimage.colors] = 0;
xlockimage.color[black+2*xlockimage.colors] = 0;
}
/* supply data and colours*/
pixel_num = malloc( xlockimage.colors * sizeof( unsigned long ) );
for ( i=0 ; i<xlockimage.colors ; i++ )
{
XColor Xcol;
Xcol.red = xlockimage.color[ i ]*257;
Xcol.green = xlockimage.color[ i + xlockimage.colors ]*257;
Xcol.blue = xlockimage.color[ i + 2 * xlockimage.colors ]*257;
XAllocColor( MI_DISPLAY(mi) , m_cmap , &Xcol);
pixel_num[i] = Xcol.pixel;
}
tmpdata = rasdata;
for ( y=0; y<xlockimage.height; y++ )
{
for ( x=0; x<xlockimage.width; x++)
{
XPutPixel( *image , x , y , pixel_num[ tmpdata[ 0 ] ] );
tmpdata++;
}
}
free( rasdata );
free( pixel_num );
return RasterSuccess;
}
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