/* This version of fromxwd has been fixed by Brian Paul to work with */
/* TrueColor xwd files. */
/*
* fromxwd -
* Convert an xwd file to IRIS image file format.
*
* Copyright 1989 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. M.I.T. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* M.I.T. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL M.I.T.
* BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Paul Haeberli - 1990
*/
#include "../config.h"
/*
* The following XCOLOR struct is to be used in place of X's XColor
* struct because on 32-bit systems, sizeof(XColor)=12 while on 64-bit
* systems, sizeof(XColor)=16. We MUST have an XColor struct of size
* 12 to correctly read the xwd file. BEP July-21-1995
*/
typedef struct {
unsigned int /*long*/ pixel;
unsigned short red, green, blue;
char flags; /* do_red, do_green, do_blue */
char pad;
} XCOLOR;
#include <stdio.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/XWDFile.h>
#include "gl/image.h"
unsigned long MyXGetPixel();
extern char *malloc();
unsigned Image_Size();
unsigned short *rmap;
unsigned short *gmap;
unsigned short *bmap;
short rbuf[8192];
short gbuf[8192];
short bbuf[8192];
void printxwdheader(XWDFileHeader *xi)
{
fprintf(stderr,"header size %d\n",xi->header_size);
fprintf(stderr,"file version %d\n",xi->file_version);
fprintf(stderr,"pixmap format %d\n",xi->pixmap_format);
fprintf(stderr,"pixmap depth %d\n",xi->pixmap_depth);
fprintf(stderr,"width %d height %d\n",xi->pixmap_width,xi->pixmap_height);
fprintf(stderr,"xoffset %d\n",xi->xoffset);
fprintf(stderr,"byte order %d\n",xi->byte_order);
fprintf(stderr,"bitmap unit %d\n",xi->bitmap_unit);
fprintf(stderr,"bitmap bit order %d\n",xi->bitmap_bit_order);
fprintf(stderr,"bitmap pad %d\n",xi->bitmap_pad);
fprintf(stderr,"bits per pixel %d\n",xi->bits_per_pixel);
fprintf(stderr,"bytes per line %d\n",xi->bytes_per_line);
fprintf(stderr,"visual class %d\n",xi->visual_class);
fprintf(stderr,"red mask %d\n",xi->red_mask);
fprintf(stderr,"green mask %d\n",xi->green_mask);
fprintf(stderr,"blue mask %d\n",xi->blue_mask);
fprintf(stderr,"colormap entries %d\n",xi->colormap_entries);
fprintf(stderr,"ncolors %d\n",xi->ncolors);
fprintf(stderr,"window width %d\n",xi->window_width);
fprintf(stderr,"window height %d\n",xi->window_height);
fprintf(stderr,"window x %d\n",xi->window_x);
fprintf(stderr,"window y %d\n",xi->window_y);
fprintf(stderr,"window border width %d\n",xi->window_bdrwidth);
}
void writeimage(char *name,
XImage *ximage,
unsigned short *rmap,
unsigned short *gmap,
unsigned short *bmap, int visual_class)
{
IMAGE *image;
int y, x;
unsigned long index;
int xsize, ysize;
int rshift = 0, gshift = 0, bshift = 0;
unsigned long rmask, gmask, bmask;
int rscale, gscale, bscale;
xsize = ximage->width;
ysize = ximage->height;
image = iopen(name,"w",RLE(1),3,xsize,ysize,3);
if (rmask = ximage->red_mask){
while (!(rmask & 1)) {
rmask >>= 1;
rshift++;
}
}
if (gmask = ximage->green_mask){
while (!(gmask & 1)) {
gmask >>= 1;
gshift++;
}
}
if (bmask = ximage->blue_mask){
while (!(bmask & 1)) {
bmask >>= 1;
bshift++;
}
}
/* If the Ximage uses less than 8-bit per component color, then scale */
/* up to 8-bit components */
{
int rmax = ximage->red_mask >> rshift; /* max red value */
int gmax = ximage->green_mask >> gshift; /* max green value */
int bmax = ximage->blue_mask >> bshift; /* max blue value */
rscale = 255 / rmax;
gscale = 255 / gmax;
bscale = 255 / bmax;
}
for(y=0; y<ysize; y++) {
if ((visual_class == TrueColor) || (visual_class == DirectColor)){
/* No lookup table */
if (rscale==1 && gscale==1 && bscale==1) {
for(x=0; x<xsize; x++) {
index = MyXGetPixel(ximage,x,y);
rbuf[x] = (index>>rshift)&rmask;
gbuf[x] = (index>>gshift)&gmask;
bbuf[x] = (index>>bshift)&bmask;
}
}
else {
for(x=0; x<xsize; x++) {
index = MyXGetPixel(ximage,x,y);
rbuf[x] = ((index>>rshift)&rmask) * rscale;
gbuf[x] = ((index>>gshift)&gmask) * gscale;
bbuf[x] = ((index>>bshift)&bmask) * bscale;
}
}
}
else {
/* Use lookup table */
for(x=0; x<xsize; x++) {
index = MyXGetPixel(ximage,x,y);
rbuf[x] = rmap[index];
gbuf[x] = gmap[index];
bbuf[x] = bmap[index];
}
}
putrow(image,rbuf,ysize-1-y,0);
putrow(image,gbuf,ysize-1-y,1);
putrow(image,bbuf,ysize-1-y,2);
}
iclose(image);
}
void Error(char *string);
void _swapshort (char *bp, unsigned int n);
void _swaplong (char *bp, unsigned int n);
main(argc, argv)
int argc;
char **argv;
{
int index;
register int i;
register char *buffer;
unsigned long swaptest = 1;
int count;
unsigned buffer_size;
int win_name_size;
int ncolors;
char *win_name;
XCOLOR *colors;
XWDFileHeader hdr;
XImage in_image;
FILE *in_file;
int debug;
if(argc<3) {
fprintf(stderr,"usage: fromxwd in.xwd out.rgb [-debug]\n");
exit(1);
}
if(argc>3)
debug = 1;
else
debug = 0;
in_file = fopen(argv[1], "r");
if (in_file == NULL) {
fprintf(stderr,"Can't open input file %s\n",argv[1]);
exit(1);
}
/*
* Read in header information.
*/
if(fread((char *)&hdr, sizeof(hdr), 1, in_file) != 1)
Error("Unable to read dump file header.");
if (*(char *) &swaptest)
_swaplong((char *) &hdr, sizeof(hdr));
if(debug)
printxwdheader(&hdr);
/* check to see if the dump file is in the proper format */
if (hdr.file_version != XWD_FILE_VERSION) {
fprintf(stderr,"xwud: XWD file format version mismatch.");
Error("exiting.");
}
if (hdr.header_size < sizeof(hdr)) {
fprintf(stderr,"xwud: XWD header size is too small.");
Error("exiting.");
}
/* alloc window name */
win_name_size = (hdr.header_size - sizeof(hdr));
if((win_name = malloc((unsigned) win_name_size)) == NULL)
Error("Can't malloc window name storage.");
/* read in window name */
if(fread(win_name, sizeof(char), win_name_size, in_file) != win_name_size)
Error("Unable to read window name from dump file.");
if(debug)
fprintf(stderr,"Win name is %s\n",win_name);
/* read in the color map buffer */
ncolors = hdr.ncolors;
if(ncolors != 0) {
colors = (XCOLOR *)malloc((unsigned) ncolors * sizeof(XCOLOR));
if (!colors)
Error("Can't malloc color table");
rmap = (unsigned short *)malloc(ncolors*sizeof(short));
gmap = (unsigned short *)malloc(ncolors*sizeof(short));
bmap = (unsigned short *)malloc(ncolors*sizeof(short));
if(fread((char *) colors, sizeof(XCOLOR), ncolors, in_file) != ncolors)
Error("Unable to read color map from dump file.");
if (*(char *) &swaptest) {
for (i = 0; i < ncolors; i++) {
_swaplong((char *) &colors[i].pixel, sizeof(long));
_swapshort((char *) &colors[i].red, 3 * sizeof(short));
}
}
if (hdr.visual_class!=TrueColor) {
for (i = 0; i < ncolors; i++) {
if(colors[i].pixel>=ncolors) {
fprintf(stderr,"pixel value %d is out of range 0..%d\n",
colors[i].pixel,ncolors-1);
exit(1);
}
index = colors[i].pixel;
rmap[index] = (colors[i].red>>8);
gmap[index] = (colors[i].green>>8);
bmap[index] = (colors[i].blue>>8);
if(debug) {
fprintf(stderr,"pixel: %d ",index);
fprintf(stderr,"r: %d g: %d b: %d\n",rmap[index],gmap[index],bmap[index]);
}
}
}
} else {
rmap = (unsigned short *)malloc(2*sizeof(short));
gmap = (unsigned short *)malloc(2*sizeof(short));
bmap = (unsigned short *)malloc(2*sizeof(short));
rmap[0] = gmap[0] = bmap[0] = 0;
rmap[1] = gmap[1] = bmap[1] = 255;
}
/* alloc the pixel buffer */
buffer_size = Image_Size(&hdr);
if((buffer = malloc(buffer_size)) == NULL)
Error("Can't malloc data buffer.");
/* read in the image data */
count = fread(buffer, sizeof(char), (int)buffer_size, in_file);
if (count != buffer_size)
Error("Unable to read pixmap from dump file.");
/* close the input file */
fclose(in_file);
/* initialize the input image */
in_image.width = (int) hdr.pixmap_width;
in_image.height = (int) hdr.pixmap_height;
in_image.xoffset = (int) hdr.xoffset;
in_image.format = (int) hdr.pixmap_format;
in_image.data = buffer;
in_image.byte_order = (int) hdr.byte_order;
in_image.bitmap_unit = (int) hdr.bitmap_unit;
in_image.bitmap_bit_order = (int) hdr.bitmap_bit_order;
in_image.bitmap_pad = (int) hdr.bitmap_pad;
in_image.depth = (int) hdr.pixmap_depth;
in_image.bytes_per_line = (int) hdr.bytes_per_line;
in_image.bits_per_pixel = (int) hdr.bits_per_pixel;
in_image.red_mask = hdr.red_mask;
in_image.green_mask = hdr.green_mask;
in_image.blue_mask = hdr.blue_mask;
in_image.obdata = NULL;
switch(hdr.pixmap_format) {
case XYBitmap:
case XYPixmap:
case ZPixmap:
writeimage(argv[2],&in_image,rmap,gmap,bmap,hdr.visual_class);
break;
default:
fprintf(stderr,"strange pixmap format\n");
break;
}
exit(0);
}
unsigned Image_Size(xi)
XWDFileHeader *xi;
{
if (xi->pixmap_format == ZPixmap)
return ((unsigned)xi->bytes_per_line * xi->pixmap_height);
else
return (xi->bytes_per_line * xi->pixmap_depth * xi->pixmap_height);
}
void Error(char *string)
{
fprintf(stderr, "xwud: Error => %s\n", string);
exit(1);
}
void _swapshort (char *bp, unsigned int n)
{
register char c;
register char *ep = bp + n;
while (bp < ep) {
c = *bp;
*bp = *(bp + 1);
bp++;
*bp++ = c;
}
}
void _swaplong (char *bp, unsigned int n)
{
register char c;
register char *ep = bp + n;
register char *sp;
while (bp < ep) {
sp = bp + 3;
c = *sp;
*sp = *bp;
*bp++ = c;
sp = bp + 1;
c = *sp;
*sp = *bp;
*bp++ = c;
bp += 2;
}
}
/*
* XGetPixel follows
*
*/
static unsigned char const _reverse_byte[0x100] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};
static void _Reverse_Bytes (bpt, nb)
register unsigned char *bpt;
register int nb;
{
do {
*bpt = _reverse_byte[*bpt];
bpt++;
} while (--nb > 0);
return;
}
static void _normalizeimagebits (char *bpt, int nb, int byteorder,
int unitsize, int bitorder)
/* unsigned char *bpt; beginning pointer to image bits */
/* int nb; number of bytes to normalize */
/* int byteorder; swap bytes if byteorder == MSBFirst */
/* int unitsize; size of the bitmap_unit or Zpixel */
/* int bitorder; swap bits if bitorder == MSBFirst */
{
if ((byteorder==MSBFirst) && (byteorder!=bitorder)) {
register char c;
register unsigned char *bp = bpt;
register unsigned char *ep = bpt + nb;
register unsigned char *sp;
switch (unitsize) {
case 4:
do { /* swap nibble */
*bp = ((*bp >> 4) & 0xF) | ((*bp << 4) & ~0xF);
bp++;
}
while (bp < ep);
break;
case 16:
do { /* swap short */
c = *bp;
*bp = *(bp + 1);
bp++;
*bp = c;
bp++;
}
while (bp < ep);
break;
case 24:
do { /* swap three */
c = *(bp + 2);
*(bp + 2) = *bp;
*bp = c;
bp += 3;
}
while (bp < ep);
break;
case 32:
do { /* swap long */
sp = bp + 3;
c = *sp;
*sp = *bp;
*bp++ = c;
sp = bp + 1;
c = *sp;
*sp = *bp;
*bp++ = c;
bp += 2;
}
while (bp < ep);
break;
}
}
if (bitorder == MSBFirst) {
_Reverse_Bytes (bpt, nb);
}
}
/*
* Macros
*
* The ROUNDUP macro rounds up a quantity to the specified boundary.
*
* The XYNORMALIZE macro determines whether XY format data requires
* normalization and calls a routine to do so if needed. The logic in
* this module is designed for LSBFirst byte and bit order, so
* normalization is done as required to present the data in this order.
*
* The ZNORMALIZE macro performs byte and nibble order normalization if
* required for Z format data.
*
* The XYINDEX macro computes the index to the starting byte (char) boundary
* for a bitmap_unit containing a pixel with coordinates x and y for image
* data in XY format.
*
* The ZINDEX macro computes the index to the starting byte (char) boundary
* for a pixel with coordinates x and y for image data in ZPixmap format.
*
*/
#define ROUNDUP(nbytes, pad) ((((nbytes) + ((pad) - 1)) / (pad)) * (pad))
#define XYNORMALIZE(bp, nbytes, img) \
if ((img->byte_order == MSBFirst) || (img->bitmap_bit_order == MSBFirst)) \
_normalizeimagebits((unsigned char *)(bp), (nbytes), img->byte_order, img->bitmap_unit, \
img->bitmap_bit_order)
#define ZNORMALIZE(bp, nbytes, img) \
if (img->byte_order == MSBFirst) \
_normalizeimagebits((unsigned char *)(bp), (nbytes), MSBFirst, img->bits_per_pixel, \
LSBFirst)
#define XYINDEX(x, y, img) \
((y) * img->bytes_per_line) + \
(((x) + img->xoffset) / img->bitmap_unit) * (img->bitmap_unit >> 3)
#define ZINDEX(x, y, img) ((y) * img->bytes_per_line) + \
(((x) * img->bits_per_pixel) >> 3)
/*
* GetPixel
*
* Returns the specified pixel. The X and Y coordinates are relative to
* the origin (upper left [0,0]) of the image. The pixel value is returned
* in normalized format, i.e. the LSB of the long is the LSB of the pixel.
* The algorithm used is:
*
* copy the source bitmap_unit or Zpixel into temp
* normalize temp if needed
* extract the pixel bits into return value
*
*/
static unsigned long const low_bits_table[] = {
0x00000000, 0x00000001, 0x00000003, 0x00000007,
0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
0x0fffffff, 0x1fffffff, 0x3fffffff, 0x7fffffff,
0xffffffff
};
static unsigned long _XGetPixel( XImage *ximage, int x, int y )
{
unsigned long pixel, px;
register char *src;
register char *dst;
register int i, j;
int bits, nbytes;
long plane;
if (ximage->depth == 1) {
src = &ximage->data[XYINDEX(x, y, ximage)];
dst = (char *)&pixel;
pixel = 0;
nbytes = ximage->bitmap_unit >> 3;
for (i=0; i < nbytes; i++) *dst++ = *src++;
XYNORMALIZE(&pixel, nbytes, ximage);
bits = (x + ximage->xoffset) % ximage->bitmap_unit;
pixel = ((((char *)&pixel)[bits>>3])>>(bits&7)) & 1;
} else if (ximage->format == XYPixmap) {
pixel = 0;
plane = 0;
nbytes = ximage->bitmap_unit >> 3;
for (i=0; i < ximage->depth; i++) {
src = &ximage->data[XYINDEX(x, y, ximage)+ plane];
dst = (char *)&px;
px = 0;
for (j=0; j < nbytes; j++) *dst++ = *src++;
XYNORMALIZE(&px, nbytes, ximage);
bits = (x + ximage->xoffset) % ximage->bitmap_unit;
pixel = (pixel << 1) |
(((((char *)&px)[bits>>3])>>(bits&7)) & 1);
plane = plane + (ximage->bytes_per_line * ximage->height);
}
} else if (ximage->format == ZPixmap) {
src = &ximage->data[ZINDEX(x, y, ximage)];
dst = (char *)&px;
px = 0;
nbytes = ROUNDUP(ximage->bits_per_pixel, 8) >> 3;
for (i=0; i < nbytes; i++) *dst++ = *src++;
ZNORMALIZE(&px, nbytes, ximage);
pixel = 0;
for (i=sizeof(unsigned long); --i >= 0; )
pixel = (pixel << 8) | ((unsigned char *)&px)[i];
if (ximage->bits_per_pixel == 4) {
if (x & 1)
pixel >>= 4;
else
pixel &= 0xf;
}
} else {
fprintf(stderr, "XGetPixel: bad image!!\n");
exit(1);
}
if (ximage->bits_per_pixel == ximage->depth)
return pixel;
else
return (pixel & low_bits_table[ximage->depth]);
}
static unsigned long _XGetPixel8 ( XImage *ximage, int x, int y )
{
unsigned char pixel;
pixel = ((unsigned char *)ximage->data)
[y * ximage->bytes_per_line + x];
if (ximage->depth != 8)
pixel &= low_bits_table[ximage->depth];
return pixel;
}
static unsigned long _XGetPixel1 ( XImage *ximage, int x, int y )
{
unsigned char bit;
int xoff, yoff;
xoff = x + ximage->xoffset;
yoff = y * ximage->bytes_per_line + (xoff >> 3);
xoff &= 7;
if (ximage->bitmap_bit_order == MSBFirst)
bit = 0x80 >> xoff;
else
bit = 1 << xoff;
return (ximage->data[yoff] & bit) ? 1 : 0;
}
unsigned long MyXGetPixel ( XImage *image, int x, int y )
{
if ((image->format == ZPixmap) && (image->bits_per_pixel == 8)) {
return _XGetPixel8(image,x,y);
} else if ((image->depth == 1) &&
(image->byte_order == image->bitmap_bit_order)) {
return _XGetPixel1(image,x,y);
} else {
return _XGetPixel(image,x,y);
}
}
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