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- /*
- * Copyright 1991, 1992, 1993, 1994, Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
- * the contents of this file may not be disclosed to third parties, copied or
- * duplicated in any form, in whole or in part, without the prior written
- * permission of Silicon Graphics, Inc.
- *
- * RESTRICTED RIGHTS LEGEND:
- * Use, duplication or disclosure by the Government is subject to restrictions
- * as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
- * and Computer Software clause at DFARS 252.227-7013, and/or in similar or
- * successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
- * rights reserved under the Copyright Laws of the United States.
- */
- /* textures.c
- * ----------
- *
- * $Revision: 1.2 $
- *
- */
-
- #include <gl/gl.h>
- #include <gl/image.h>a
-
- static int firsted;
-
- bwtocpack(b,l,n)
- register unsigned short *b;
- register unsigned long *l;
- register int n;
- {
- while(n>=8) {
- l[0] = 0x00010101*b[0];
- l[1] = 0x00010101*b[1];
- l[2] = 0x00010101*b[2];
- l[3] = 0x00010101*b[3];
- l[4] = 0x00010101*b[4];
- l[5] = 0x00010101*b[5];
- l[6] = 0x00010101*b[6];
- l[7] = 0x00010101*b[7];
- l += 8;
- b += 8;
- n -= 8;
- }
- while(n--)
- *l++ = 0x00010101*(*b++);
- }
-
- rgbtocpack(r,g,b,l,n)
- register unsigned short *r, *g, *b;
- register unsigned long *l;
- register int n;
- {
- while(n>=8) {
- l[0] = r[0] | (g[0]<<8) | (b[0]<<16);
- l[1] = r[1] | (g[1]<<8) | (b[1]<<16);
- l[2] = r[2] | (g[2]<<8) | (b[2]<<16);
- l[3] = r[3] | (g[3]<<8) | (b[3]<<16);
- l[4] = r[4] | (g[4]<<8) | (b[4]<<16);
- l[5] = r[5] | (g[5]<<8) | (b[5]<<16);
- l[6] = r[6] | (g[6]<<8) | (b[6]<<16);
- l[7] = r[7] | (g[7]<<8) | (b[7]<<16);
- l += 8;
- r += 8;
- g += 8;
- b += 8;
- n -= 8;
- }
- while(n--)
- *l++ = *r++ | ((*g++)<<8) | ((*b++)<<16);
- }
-
- rgbatocpack(r,g,b,a,l,n)
- register unsigned short *r, *g, *b, *a;
- register unsigned long *l;
- register int n;
- {
- while(n>=8) {
- l[0] = r[0] | (g[0]<<8) | (b[0]<<16) | (a[0]<<24);
- l[1] = r[1] | (g[1]<<8) | (b[1]<<16) | (a[1]<<24);
- l[2] = r[2] | (g[2]<<8) | (b[2]<<16) | (a[2]<<24);
- l[3] = r[3] | (g[3]<<8) | (b[3]<<16) | (a[3]<<24);
- l[4] = r[4] | (g[4]<<8) | (b[4]<<16) | (a[4]<<24);
- l[5] = r[5] | (g[5]<<8) | (b[5]<<16) | (a[5]<<24);
- l[6] = r[6] | (g[6]<<8) | (b[6]<<16) | (a[6]<<24);
- l[7] = r[7] | (g[7]<<8) | (b[7]<<16) | (a[7]<<24);
- l += 8;
- r += 8;
- g += 8;
- b += 8;
- a += 8;
- n -= 8;
- }
- while(n--)
- *l++ = *r++ | ((*g++)<<8) | ((*b++)<<16) | ((*a++)<<24);
- }
-
- unsigned long *longimagedata(name)
- char *name;
- {
- unsigned long *base, *lptr;
- short *rbuf, *gbuf, *bbuf, *abuf;
- IMAGE *image;
- int y;
-
- image = iopen(name,"r");
- if(!image) {
- fprintf(stderr,"longimagedata: can't open image file %s\n",name);
- exit(1);
- }
- base = (unsigned long *)malloc(image->xsize*image->ysize*sizeof(unsigned long));
- rbuf = (short *)malloc(image->xsize*sizeof(short));
- gbuf = (short *)malloc(image->xsize*sizeof(short));
- bbuf = (short *)malloc(image->xsize*sizeof(short));
- abuf = (short *)malloc(image->xsize*sizeof(short));
- if(!base || !rbuf || !gbuf || !bbuf) {
- fprintf(stderr,"longimagedata: can't malloc enough memory\n");
- exit(1);
- }
- lptr = base;
- for(y=0; y<image->ysize; y++) {
- if(image->zsize>=4) {
- getrow(image,rbuf,y,0);
- getrow(image,gbuf,y,1);
- getrow(image,bbuf,y,2);
- getrow(image,abuf,y,3);
- rgbatocpack(rbuf,gbuf,bbuf,abuf,lptr,image->xsize);
- lptr += image->xsize;
- } else if(image->zsize==3) {
- getrow(image,rbuf,y,0);
- getrow(image,gbuf,y,1);
- getrow(image,bbuf,y,2);
- rgbtocpack(rbuf,gbuf,bbuf,lptr,image->xsize);
- lptr += image->xsize;
- } else {
- getrow(image,rbuf,y,0);
- bwtocpack(rbuf,lptr,image->xsize);
- lptr += image->xsize;
- }
- }
- iclose(image);
- free(rbuf);
- free(gbuf);
- free(bbuf);
- free(abuf);
- return base;
- }
-
- textureread(name,texno)
- char *name;
- long texno;
- {
- unsigned long *imagedata;
- int i;
- static float texps[] = {TX_MINFILTER,TX_MIPMAP_LINEAR,TX_MAGFILTER,TX_BILINEAR,0};
- static float tevps[] = {0};
-
- imagedata = longimagedata(name);
- texdef2d(texno, 4, 128, 128, imagedata, 0, texps);
- if(!firsted) {
- tevdef(1, 0, tevps);
- tevbind(0,1);
- firsted = 1;
- }
- }
-
- settexture(n)
- int n;
- {
- texbind(TX_TEXTURE_0, n);
- }
-