+++ /dev/null
-
-/* Copyright (c) Mark J. Kilgard, 1994. */
-
-/*
- * (c) Copyright 1993, Silicon Graphics, Inc.
- * ALL RIGHTS RESERVED
- * Permission to use, copy, modify, and distribute this software for
- * any purpose and without fee is hereby granted, provided that the above
- * copyright notice appear in all copies and that both the copyright notice
- * and this permission notice appear in supporting documentation, and that
- * the name of Silicon Graphics, Inc. not be used in advertising
- * or publicity pertaining to distribution of the software without specific,
- * written prior permission.
- *
- * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "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, INC. BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
- * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
- * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
- * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
- * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC. HAS BEEN
- * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
- * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
- * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * US Government Users Restricted Rights
- * Use, duplication, or disclosure by the Government is subject to
- * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
- * (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 or the DOD or NASA FAR Supplement.
- * Unpublished-- rights reserved under the copyright laws of the
- * United States. Contractor/manufacturer is Silicon Graphics,
- * Inc., 2011 N. Shoreline Blvd., Mountain View, CA 94039-7311.
- *
- * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
- */
-/* mipmap.c
- * This program demonstrates using mipmaps for texture maps.
- * To overtly show the effect of mipmaps, each mipmap reduction
- * level has a solidly colored, contrasting texture image.
- * Thus, the quadrilateral which is drawn is drawn with several
- * different colors.
- */
-#include <stdlib.h>
-#include <stdio.h>
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-GLubyte mipmapImage32[40][46][3];
-GLubyte mipmapImage16[20][23][3];
-GLubyte mipmapImage8[10][11][3];
-GLubyte mipmapImage4[5][5][3];
-GLubyte mipmapImage2[2][2][3];
-GLubyte mipmapImage1[1][1][3];
-
-static void makeImages(void)
-{
- int i, j;
-
- for (i = 0; i < 40; i++) {
- for (j = 0; j < 46; j++) {
- mipmapImage32[i][j][0] = 255;
- mipmapImage32[i][j][1] = 255;
- mipmapImage32[i][j][2] = 0;
- }
- }
- for (i = 0; i < 20; i++) {
- for (j = 0; j < 23; j++) {
- mipmapImage16[i][j][0] = 255;
- mipmapImage16[i][j][1] = 0;
- mipmapImage16[i][j][2] = 255;
- }
- }
- for (i = 0; i < 10; i++) {
- for (j = 0; j < 11; j++) {
- mipmapImage8[i][j][0] = 255;
- mipmapImage8[i][j][1] = 0;
- mipmapImage8[i][j][2] = 0;
- }
- }
- for (i = 0; i < 5; i++) {
- for (j = 0; j < 5; j++) {
- mipmapImage4[i][j][0] = 0;
- mipmapImage4[i][j][1] = 255;
- mipmapImage4[i][j][2] = 0;
- }
- }
- for (i = 0; i < 2; i++) {
- for (j = 0; j < 2; j++) {
- mipmapImage2[i][j][0] = 0;
- mipmapImage2[i][j][1] = 0;
- mipmapImage2[i][j][2] = 255;
- }
- }
- mipmapImage1[0][0][0] = 255;
- mipmapImage1[0][0][1] = 255;
- mipmapImage1[0][0][2] = 255;
-}
-
-static void myinit(void)
-{
- if (!glutExtensionSupported("GL_ARB_texture_non_power_of_two")) {
- printf("Sorry, this program requires GL_ARB_texture_non_power_of_two\n");
- exit(1);
- }
-
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- glShadeModel(GL_FLAT);
-
- glTranslatef(0.0, 0.0, -3.6);
- makeImages();
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, 40, 46, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage32[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 1, 3, 20, 23, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage16[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 2, 3, 10, 11, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage8[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 3, 3, 5, 5, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage4[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 4, 3, 2, 2, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage2[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 5, 3, 1, 1, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage1[0][0][0]);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
- GL_NEAREST_MIPMAP_NEAREST);
- glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
- glEnable(GL_TEXTURE_2D);
-}
-
-static void display(void)
-{
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glBegin(GL_QUADS);
- glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
- glTexCoord2f(0.0, 8.0); glVertex3f(-2.0, 1.0, 0.0);
- glTexCoord2f(8.0, 8.0); glVertex3f(2000.0, 1.0, -6000.0);
- glTexCoord2f(8.0, 0.0); glVertex3f(2000.0, -1.0, -6000.0);
- glEnd();
- glFlush();
-}
-
-static void myReshape(int w, int h)
-{
- glViewport(0, 0, w, h);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- gluPerspective(60.0, 1.0*(GLfloat)w/(GLfloat)h, 1.0, 30000.0);
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
-}
-
-static void
-key(unsigned char k, int x, int y)
-{
- switch (k) {
- case 27: /* Escape */
- exit(0);
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-int main(int argc, char** argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize (500, 500);
- glutCreateWindow (argv[0]);
- glewInit();
- myinit();
- glutReshapeFunc (myReshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
projects / mesa.git / blobdiff