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Diffstat (limited to 'progs/tests/mipgen.c')
| -rw-r--r-- | progs/tests/mipgen.c | 207 |
1 files changed, 0 insertions, 207 deletions
diff --git a/progs/tests/mipgen.c b/progs/tests/mipgen.c deleted file mode 100644 index 088f643215..0000000000 --- a/progs/tests/mipgen.c +++ /dev/null @@ -1,207 +0,0 @@ -/* Test GL_TEXTURE_BASE_LEVEL and GL_TEXTURE_MAX_LEVEL - * Brian Paul - * 10 May 2006 - */ - - -/* 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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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. - */ - -#include <stdlib.h> -#include <stdio.h> -#include <GL/glew.h> -#include <GL/glut.h> - -#include "readtex.h" - - -static GLfloat LodBias = 6.0; /* make smallest miplevel visible */ -static GLuint texImage; - -#define WIDTH 2 -#define HEIGHT 2 - -static void -InitValues(void) -{ - LodBias = 6.0; /* make smallest miplevel visible */ -} - - -static void MakeImage(void) -{ - const GLubyte color0[4] = { 0xff, 0x80, 0x20, 0xff }; - const GLubyte color1[4] = { 0x10, 0x20, 0x40, 0xff }; - - GLubyte img[WIDTH*HEIGHT*3]; - int i, j; - for (i = 0; i < HEIGHT; i++) { - for (j = 0; j < WIDTH; j++) { - int k = (i * WIDTH + j) * 3; - int p = ((i+j)%2); - if (p == 0) { - img[k + 0] = color0[0]; - img[k + 1] = color0[1]; - img[k + 2] = color0[2]; - } - else { - img[k + 0] = color1[0]; - img[k + 1] = color1[1]; - img[k + 2] = color1[2]; - } - } - } - - glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE); - glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, WIDTH, HEIGHT, 0, - GL_RGB, GL_UNSIGNED_BYTE, img); - glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_FALSE); -} - - - -static void myinit(void) -{ - InitValues(); - - glShadeModel(GL_FLAT); - - glTranslatef(0.0, 0.0, -3.6); - - glPixelStorei(GL_UNPACK_ALIGNMENT, 1); - glGenTextures(1, &texImage); - glBindTexture(GL_TEXTURE_2D, texImage); - MakeImage(); - - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); - glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL); - glEnable(GL_TEXTURE_2D); - - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, 0); - glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, 1); - - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, -1); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, 1); - - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, - GL_NEAREST_MIPMAP_NEAREST); -} - - - -static void display(void) -{ - GLfloat tcm = 1.0; - glBindTexture(GL_TEXTURE_2D, texImage); - - printf("Bias=%.2g\n", LodBias); - fflush(stdout); - - glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias); - - glClear(GL_COLOR_BUFFER_BIT); - glBegin(GL_QUADS); - glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0); - glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0); - glTexCoord2f(tcm * 3000.0, tcm); glVertex3f(3000.0, 1.0, -6000.0); - glTexCoord2f(tcm * 3000.0, 0.0); glVertex3f(3000.0, -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) -{ - (void) x; - (void) y; - switch (k) { - case 'l': - LodBias -= 0.25; - break; - case 'L': - LodBias += 0.25; - break; - case ' ': - InitValues(); - break; - case 27: /* Escape */ - exit(0); - break; - default: - return; - } - glutPostRedisplay(); -} - - -static void usage(void) -{ - printf("usage:\n"); - printf(" l/L decrease/increase GL_TEXTURE_LOD_BIAS\n"); - printf(" SPACE reset values\n"); -} - - -int main(int argc, char** argv) -{ - glutInit(&argc, argv); - glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB ); - glutInitWindowSize (600, 600); - glutCreateWindow (argv[0]); - glewInit(); - myinit(); - glutReshapeFunc (myReshape); - glutDisplayFunc(display); - glutKeyboardFunc(key); - usage(); - glutMainLoop(); - return 0; /* ANSI C requires main to return int. */ -} |