| /* |
| * 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 <math.h> |
| #include <stdlib.h> |
| #include <GL/glut.h> |
| |
| |
| #include "loadppm.c" |
| |
| GLenum doubleBuffer; |
| |
| char *texFileName = 0; |
| PPMImage *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 void Key2(int key, int x, int y) |
| { |
| |
| switch (key) { |
| case GLUT_KEY_LEFT: |
| yRotation -= 0.5; |
| break; |
| case GLUT_KEY_RIGHT: |
| yRotation += 0.5; |
| break; |
| case GLUT_KEY_UP: |
| xRotation -= 0.5; |
| break; |
| case GLUT_KEY_DOWN: |
| xRotation += 0.5; |
| break; |
| default: |
| return; |
| } |
| |
| glutPostRedisplay(); |
| } |
| |
| static void Key(unsigned char key, int x, int y) |
| { |
| |
| switch (key) { |
| case 27: |
| exit(1); |
| |
| case 'T': |
| zTranslate += 0.25; |
| break; |
| case 't': |
| zTranslate -= 0.25; |
| break; |
| |
| case '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 '0': |
| magFilter = nr; |
| break; |
| case '1': |
| magFilter = ln; |
| break; |
| case '2': |
| minFilter = nr; |
| break; |
| case '3': |
| minFilter = ln; |
| break; |
| case '4': |
| minFilter = nr_mipmap_nr; |
| break; |
| case '5': |
| minFilter = nr_mipmap_ln; |
| break; |
| case '6': |
| minFilter = ln_mipmap_nr; |
| break; |
| case '7': |
| minFilter = ln_mipmap_ln; |
| break; |
| default: |
| return; |
| } |
| |
| glutPostRedisplay(); |
| } |
| |
| 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) { |
| glutSwapBuffers(); |
| } |
| } |
| |
| static GLenum Args(int argc, char **argv) |
| { |
| GLint i; |
| |
| doubleBuffer = GL_FALSE; |
| |
| 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], "-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; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| GLenum type; |
| |
| glutInit(&argc, argv); |
| |
| if (Args(argc, argv) == GL_FALSE) { |
| exit(1); |
| } |
| |
| if (texFileName == 0) { |
| printf("No image file.\n"); |
| exit(1); |
| } |
| |
| image = LoadPPM(texFileName); |
| |
| glutInitWindowPosition(0, 0); glutInitWindowSize( 300, 300); |
| |
| type = GLUT_RGB; |
| type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE; |
| glutInitDisplayMode(type); |
| |
| if (glutCreateWindow("Texture Test") == GL_FALSE) { |
| exit(1); |
| } |
| |
| Init(); |
| |
| glutReshapeFunc(Reshape); |
| glutKeyboardFunc(Key); |
| glutSpecialFunc(Key2); |
| glutDisplayFunc(Draw); |
| glutMainLoop(); |
| return 0; |
| } |