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481 lines
8.5 KiB
481 lines
8.5 KiB
/*
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* (c) Copyright 1993, Silicon Graphics, Inc.
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* ALL RIGHTS RESERVED
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* Permission to use, copy, modify, and distribute this software for
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* any purpose and without fee is hereby granted, provided that the above
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* copyright notice appear in all copies and that both the copyright notice
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* and this permission notice appear in supporting documentation, and that
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* the name of Silicon Graphics, Inc. not be used in advertising
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* or publicity pertaining to distribution of the software without specific,
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* written prior permission.
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*
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* THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
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* AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
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* FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL SILICON
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* GRAPHICS, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
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* SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
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* KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
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* LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
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* THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
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* ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
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* POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* US Government Users Restricted Rights
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
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* (c)(1)(ii) of the Rights in Technical Data and Computer Software
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* clause at DFARS 252.227-7013 and/or in similar or successor
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* clauses in the FAR or the DOD or NASA FAR Supplement.
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* Unpublished-- rights reserved under the copyright laws of the
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* United States. Contractor/manufacturer is Silicon Graphics,
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* Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
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*
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* OpenGL(TM) is a trademark of Silicon Graphics, Inc.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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//#include <unistd.h>
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#include <math.h>
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#include <stdlib.h>
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#include "tk.h"
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GLenum doubleBuffer, directRender;
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char *texFileName = 0;
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TK_RGBImageRec *image;
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float *minFilter, *magFilter, *sWrapMode, *tWrapMode;
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float decal[] = {GL_DECAL};
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float modulate[] = {GL_MODULATE};
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float repeat[] = {GL_REPEAT};
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float clamp[] = {GL_CLAMP};
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float nr[] = {GL_NEAREST};
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float ln[] = {GL_LINEAR};
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float nr_mipmap_nr[] = {GL_NEAREST_MIPMAP_NEAREST};
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float nr_mipmap_ln[] = {GL_NEAREST_MIPMAP_LINEAR};
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float ln_mipmap_nr[] = {GL_LINEAR_MIPMAP_NEAREST};
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float ln_mipmap_ln[] = {GL_LINEAR_MIPMAP_LINEAR};
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GLint sphereMap[] = {GL_SPHERE_MAP};
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GLenum doSphere = GL_FALSE;
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float xRotation = 0.0, yRotation = 0.0, zTranslate = -3.125;
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GLint cube;
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float c[6][4][3] = {
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{
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{
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1.0, 1.0, -1.0
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},
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{
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-1.0, 1.0, -1.0
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},
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{
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-1.0, -1.0, -1.0
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},
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{
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1.0, -1.0, -1.0
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}
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},
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{
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{
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1.0, 1.0, 1.0
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},
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{
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1.0, 1.0, -1.0
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},
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{
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1.0, -1.0, -1.0
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},
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{
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1.0, -1.0, 1.0
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}
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},
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{
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{
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-1.0, 1.0, 1.0
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},
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{
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1.0, 1.0, 1.0
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},
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{
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1.0, -1.0, 1.0
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},
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{
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-1.0, -1.0, 1.0
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}
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},
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{
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{
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-1.0, 1.0, -1.0
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},
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{
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-1.0, 1.0, 1.0
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},
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{
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-1.0, -1.0, 1.0
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},
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{
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-1.0, -1.0, -1.0
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}
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},
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{
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{
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-1.0, 1.0, 1.0
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},
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{
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-1.0, 1.0, -1.0
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},
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{
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1.0, 1.0, -1.0
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},
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{
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1.0, 1.0, 1.0
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}
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},
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{
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{
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-1.0, -1.0, -1.0
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},
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{
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-1.0, -1.0, 1.0
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},
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{
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1.0, -1.0, 1.0
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},
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{
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1.0, -1.0, -1.0
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}
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}
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};
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static float n[6][3] = {
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{
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0.0, 0.0, -1.0
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},
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{
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1.0, 0.0, 0.0
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},
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{
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0.0, 0.0, 1.0
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},
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{
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-1.0, 0.0, 0.0
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},
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{
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0.0, 1.0, 0.0
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},
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{
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0.0, -1.0, 0.0
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}
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};
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static float t[6][4][2] = {
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{
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{
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1.1, 1.1
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},
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{
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-0.1, 1.1
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},
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{
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-0.1, -0.1
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},
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{
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1.1, -0.1
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}
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},
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{
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{
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1.1, 1.1
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},
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{
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-0.1, 1.1
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},
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{
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-0.1, -0.1
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},
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{
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1.1, -0.1
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}
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},
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{
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{
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-0.1, 1.1
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},
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{
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1.1, 1.1
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},
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{
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1.1, -0.1
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},
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{
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-0.1, -0.1
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}
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},
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{
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{
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1.1, 1.1
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},
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{
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-0.1, 1.1
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},
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{
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-0.1, -0.1
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},
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{
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1.1, -0.1
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}
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},
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{
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{
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1.1, 1.1
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},
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{
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-0.1, 1.1
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},
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{
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-0.1, -0.1
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},
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{
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1.1, -0.1
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}
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},
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{
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{
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1.1, 1.1
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},
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{
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-0.1, 1.1
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},
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{
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-0.1, -0.1
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},
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{
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1.1, -0.1
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}
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},
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};
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static void BuildCube(void)
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{
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GLint i;
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glNewList(cube, GL_COMPILE);
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for (i = 0; i < 6; i++) {
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glBegin(GL_POLYGON);
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glNormal3fv(n[i]); glTexCoord2fv(t[i][0]); glVertex3fv(c[i][0]);
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glNormal3fv(n[i]); glTexCoord2fv(t[i][1]); glVertex3fv(c[i][1]);
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glNormal3fv(n[i]); glTexCoord2fv(t[i][2]); glVertex3fv(c[i][2]);
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glNormal3fv(n[i]); glTexCoord2fv(t[i][3]); glVertex3fv(c[i][3]);
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glEnd();
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}
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glEndList();
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}
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static void BuildLists(void)
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{
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cube = glGenLists(1);
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BuildCube();
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}
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static void Init(void)
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{
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image->sizeX, image->sizeY,
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GL_RGB, GL_UNSIGNED_BYTE, image->data);
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glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
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glEnable(GL_TEXTURE_2D);
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glFrontFace(GL_CCW);
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glCullFace(GL_FRONT);
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glEnable(GL_CULL_FACE);
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BuildLists();
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glClearColor(0.0, 0.0, 0.0, 0.0);
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magFilter = nr;
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minFilter = nr;
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sWrapMode = repeat;
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tWrapMode = repeat;
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}
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static void Reshape(int width, int height)
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{
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glViewport(0, 0, (GLint)width, (GLint)height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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gluPerspective(145.0, 1.0, 0.01, 1000);
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glMatrixMode(GL_MODELVIEW);
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}
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static GLenum Key(int key, GLenum mask)
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{
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switch (key) {
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case TK_ESCAPE:
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tkQuit();
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case TK_LEFT:
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yRotation -= 0.5;
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break;
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case TK_RIGHT:
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yRotation += 0.5;
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break;
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case TK_UP:
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xRotation -= 0.5;
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break;
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case TK_DOWN:
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xRotation += 0.5;
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break;
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case TK_T:
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zTranslate += 0.25;
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break;
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case TK_t:
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zTranslate -= 0.25;
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break;
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case TK_s:
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doSphere = !doSphere;
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if (doSphere) {
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glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap);
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glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap);
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glEnable(GL_TEXTURE_GEN_S);
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glEnable(GL_TEXTURE_GEN_T);
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} else {
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glDisable(GL_TEXTURE_GEN_S);
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glDisable(GL_TEXTURE_GEN_T);
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}
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break;
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case TK_0:
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magFilter = nr;
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break;
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case TK_1:
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magFilter = ln;
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break;
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case TK_2:
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minFilter = nr;
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break;
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case TK_3:
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minFilter = ln;
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break;
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case TK_4:
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minFilter = nr_mipmap_nr;
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break;
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case TK_5:
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minFilter = nr_mipmap_ln;
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break;
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case TK_6:
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minFilter = ln_mipmap_nr;
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break;
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case TK_7:
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minFilter = ln_mipmap_ln;
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break;
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default:
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return GL_FALSE;
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}
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return GL_TRUE;
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}
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static void Draw(void)
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{
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glClear(GL_COLOR_BUFFER_BIT);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sWrapMode);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tWrapMode);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
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glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
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glPushMatrix();
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glTranslatef(0.0, 0.0, zTranslate);
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glRotatef(xRotation, 1, 0, 0);
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glRotatef(yRotation, 0, 1, 0);
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glCallList(cube);
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glPopMatrix();
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glFlush();
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if (doubleBuffer) {
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tkSwapBuffers();
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}
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}
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static GLenum Args(int argc, char **argv)
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{
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GLint i;
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doubleBuffer = GL_FALSE;
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directRender = GL_FALSE;
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for (i = 1; i < argc; i++) {
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if (strcmp(argv[i], "-sb") == 0) {
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doubleBuffer = GL_FALSE;
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} else if (strcmp(argv[i], "-db") == 0) {
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doubleBuffer = GL_TRUE;
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} else if (strcmp(argv[i], "-dr") == 0) {
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directRender = GL_TRUE;
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} else if (strcmp(argv[i], "-ir") == 0) {
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directRender = GL_FALSE;
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} else if (strcmp(argv[i], "-f") == 0) {
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if (i+1 >= argc || argv[i+1][0] == '-') {
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printf("-f (No file name).\n");
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return GL_FALSE;
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} else {
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texFileName = argv[++i];
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}
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} else {
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printf("%s (Bad option).\n", argv[i]);
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return GL_FALSE;
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}
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}
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return GL_TRUE;
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}
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void main(int argc, char **argv)
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{
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GLenum type;
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if (Args(argc, argv) == GL_FALSE) {
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tkQuit();
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}
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if (texFileName == 0) {
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printf("No image file.\n");
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tkQuit();
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}
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image = tkRGBImageLoad(texFileName);
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tkInitPosition(0, 0, 300, 300);
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type = TK_RGB;
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type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
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type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
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tkInitDisplayMode(type);
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if (tkInitWindow("Texture Test") == GL_FALSE) {
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tkQuit();
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}
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Init();
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tkExposeFunc(Reshape);
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tkReshapeFunc(Reshape);
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tkKeyDownFunc(Key);
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tkDisplayFunc(Draw);
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tkExec();
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}
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