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/*
* Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
*
* Permission to use, copy, modify, distribute, and sell this software and
* its documentation for any purpose is hereby granted without fee, provided
* that (i) the above copyright notices and this permission notice appear in
* all copies of the software and related documentation, and (ii) the name of
* Silicon Graphics may not be used in any advertising or
* publicity relating to the software without the specific, prior written
* permission of Silicon Graphics.
*
* THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
* ANY KIND,
* EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
* WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
*
* IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
* ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
* OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
* WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
* LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
#include <stdlib.h>
#include "gltk.h"
GLenum doubleBuffer, directRender;
char *texFileName = 0;
TK_RGBImageRec *image;
float *minFilter, *magFilter, *sWrapMode, *tWrapMode;
float decal[] = {GL_DECAL};
float modulate[] = {GL_MODULATE};
float repeat[] = {GL_REPEAT};
float clamp[] = {GL_CLAMP};
float nr[] = {GL_NEAREST};
float ln[] = {GL_LINEAR};
float nr_mipmap_nr[] = {GL_NEAREST_MIPMAP_NEAREST};
float nr_mipmap_ln[] = {GL_NEAREST_MIPMAP_LINEAR};
float ln_mipmap_nr[] = {GL_LINEAR_MIPMAP_NEAREST};
float ln_mipmap_ln[] = {GL_LINEAR_MIPMAP_LINEAR};
GLint sphereMap[] = {GL_SPHERE_MAP};
GLenum doSphere = GL_FALSE;
float xRotation = 0.0, yRotation = 0.0, zTranslate = -3.125;
GLint cube;
float c[6][4][3] = {
{
{
1.0, 1.0, -1.0
},
{
-1.0, 1.0, -1.0
},
{
-1.0, -1.0, -1.0
},
{
1.0, -1.0, -1.0
}
},
{
{
1.0, 1.0, 1.0
},
{
1.0, 1.0, -1.0
},
{
1.0, -1.0, -1.0
},
{
1.0, -1.0, 1.0
}
},
{
{
-1.0, 1.0, 1.0
},
{
1.0, 1.0, 1.0
},
{
1.0, -1.0, 1.0
},
{
-1.0, -1.0, 1.0
}
},
{
{
-1.0, 1.0, -1.0
},
{
-1.0, 1.0, 1.0
},
{
-1.0, -1.0, 1.0
},
{
-1.0, -1.0, -1.0
}
},
{
{
-1.0, 1.0, 1.0
},
{
-1.0, 1.0, -1.0
},
{
1.0, 1.0, -1.0
},
{
1.0, 1.0, 1.0
}
},
{
{
-1.0, -1.0, -1.0
},
{
-1.0, -1.0, 1.0
},
{
1.0, -1.0, 1.0
},
{
1.0, -1.0, -1.0
}
}
};
static float n[6][3] = {
{
0.0, 0.0, -1.0
},
{
1.0, 0.0, 0.0
},
{
0.0, 0.0, 1.0
},
{
-1.0, 0.0, 0.0
},
{
0.0, 1.0, 0.0
},
{
0.0, -1.0, 0.0
}
};
static float t[6][4][2] = {
{
{
1.1, 1.1
},
{
-0.1, 1.1
},
{
-0.1, -0.1
},
{
1.1, -0.1
}
},
{
{
1.1, 1.1
},
{
-0.1, 1.1
},
{
-0.1, -0.1
},
{
1.1, -0.1
}
},
{
{
-0.1, 1.1
},
{
1.1, 1.1
},
{
1.1, -0.1
},
{
-0.1, -0.1
}
},
{
{
1.1, 1.1
},
{
-0.1, 1.1
},
{
-0.1, -0.1
},
{
1.1, -0.1
}
},
{
{
1.1, 1.1
},
{
-0.1, 1.1
},
{
-0.1, -0.1
},
{
1.1, -0.1
}
},
{
{
1.1, 1.1
},
{
-0.1, 1.1
},
{
-0.1, -0.1
},
{
1.1, -0.1
}
},
};
static void BuildCube(void)
{
GLint i;
glNewList(cube, GL_COMPILE);
for (i = 0; i < 6; i++) {
glBegin(GL_POLYGON);
glNormal3fv(n[i]); glTexCoord2fv(t[i][0]); glVertex3fv(c[i][0]);
glNormal3fv(n[i]); glTexCoord2fv(t[i][1]); glVertex3fv(c[i][1]);
glNormal3fv(n[i]); glTexCoord2fv(t[i][2]); glVertex3fv(c[i][2]);
glNormal3fv(n[i]); glTexCoord2fv(t[i][3]); glVertex3fv(c[i][3]);
glEnd();
}
glEndList();
}
static void BuildLists(void)
{
cube = glGenLists(1);
BuildCube();
}
static void Init(void)
{
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
gluBuild2DMipmaps(GL_TEXTURE_2D, 3, image->sizeX, image->sizeY,
GL_RGB, GL_UNSIGNED_BYTE, image->data);
glTexEnvfv(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, decal);
glEnable(GL_TEXTURE_2D);
glFrontFace(GL_CCW);
glCullFace(GL_FRONT);
glEnable(GL_CULL_FACE);
BuildLists();
glClearColor(0.0, 0.0, 0.0, 0.0);
magFilter = nr;
minFilter = nr;
sWrapMode = repeat;
tWrapMode = repeat;
}
static void Reshape(int width, int height)
{
glViewport(0, 0, (GLint)width, (GLint)height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(145.0, 1.0, 0.01, 1000);
glMatrixMode(GL_MODELVIEW);
}
static GLenum Key(int key, GLenum mask)
{
switch (key) {
case TK_ESCAPE:
tkQuit();
case TK_LEFT:
yRotation -= 0.5;
break;
case TK_RIGHT:
yRotation += 0.5;
break;
case TK_UP:
xRotation -= 0.5;
break;
case TK_DOWN:
xRotation += 0.5;
break;
case TK_T:
zTranslate += 0.25;
break;
case TK_t:
zTranslate -= 0.25;
break;
case TK_s:
doSphere = !doSphere;
if (doSphere) {
glTexGeniv(GL_S, GL_TEXTURE_GEN_MODE, sphereMap);
glTexGeniv(GL_T, GL_TEXTURE_GEN_MODE, sphereMap);
glEnable(GL_TEXTURE_GEN_S);
glEnable(GL_TEXTURE_GEN_T);
} else {
glDisable(GL_TEXTURE_GEN_S);
glDisable(GL_TEXTURE_GEN_T);
}
break;
case TK_0:
magFilter = nr;
break;
case TK_1:
magFilter = ln;
break;
case TK_2:
minFilter = nr;
break;
case TK_3:
minFilter = ln;
break;
case TK_4:
minFilter = nr_mipmap_nr;
break;
case TK_5:
minFilter = nr_mipmap_ln;
break;
case TK_6:
minFilter = ln_mipmap_nr;
break;
case TK_7:
minFilter = ln_mipmap_ln;
break;
default:
return GL_FALSE;
}
return GL_TRUE;
}
static void Draw(void)
{
glClear(GL_COLOR_BUFFER_BIT);
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, sWrapMode);
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, tWrapMode);
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, magFilter);
glTexParameterfv(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, minFilter);
glPushMatrix();
glTranslatef(0.0, 0.0, zTranslate);
glRotatef(xRotation, 1, 0, 0);
glRotatef(yRotation, 0, 1, 0);
glCallList(cube);
glPopMatrix();
glFlush();
if (doubleBuffer) {
tkSwapBuffers();
}
}
static GLenum Args(int argc, char **argv)
{
GLint i;
doubleBuffer = GL_FALSE;
directRender = GL_TRUE;
for (i = 1; i < argc; i++) {
if (strcmp(argv[i], "-sb") == 0) {
doubleBuffer = GL_FALSE;
} else if (strcmp(argv[i], "-db") == 0) {
doubleBuffer = GL_TRUE;
} else if (strcmp(argv[i], "-dr") == 0) {
directRender = GL_TRUE;
} else if (strcmp(argv[i], "-ir") == 0) {
directRender = GL_FALSE;
} else if (strcmp(argv[i], "-f") == 0) {
if (i+1 >= argc || argv[i+1][0] == '-') {
printf("-f (No file name).\n");
return GL_FALSE;
} else {
texFileName = argv[++i];
}
} else {
printf("%s (Bad option).\n", argv[i]);
return GL_FALSE;
}
}
return GL_TRUE;
}
void main(int argc, char **argv)
{
GLenum type;
if (Args(argc, argv) == GL_FALSE) {
tkQuit();
}
if (texFileName == 0) {
printf("No image file.\n");
tkQuit();
}
image = tkRGBImageLoad(texFileName);
tkInitPosition(0, 0, 300, 300);
type = TK_RGB;
type |= (doubleBuffer) ? TK_DOUBLE : TK_SINGLE;
type |= (directRender) ? TK_DIRECT : TK_INDIRECT;
tkInitDisplayMode(type);
if (tkInitWindow("Texture Test") == GL_FALSE) {
tkQuit();
}
Init();
tkExposeFunc(Reshape);
tkReshapeFunc(Reshape);
tkKeyDownFunc(Key);
tkDisplayFunc(Draw);
tkExec();
}
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.