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-rw-r--r--progs/tests/mipmap_limits.c270
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diff --git a/progs/tests/mipmap_limits.c b/progs/tests/mipmap_limits.c
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--- a/progs/tests/mipmap_limits.c
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-/* 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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
-/* 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/glut.h>
-
-static GLint BaseLevel = 0, MaxLevel = 8;
-static GLfloat MinLod = -1, MaxLod = 9;
-static GLfloat LodBias = 0.0;
-static GLboolean NearestFilter = GL_TRUE;
-
-
-static void
-InitValues(void)
-{
- BaseLevel = 0;
- MaxLevel = 8;
- MinLod = -1;
- MaxLod = 9;
- LodBias = 0.0;
- NearestFilter = GL_TRUE;
-}
-
-
-static void MakeImage(int level, int width, int height, const GLubyte color[4])
-{
- const int makeStripes = 0;
- GLubyte img[256*256*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/8) & makeStripes;
- if (p == 0) {
- img[k + 0] = color[0];
- img[k + 1] = color[1];
- img[k + 2] = color[2];
- }
- else {
- img[k + 0] = 0;
- img[k + 1] = 0;
- img[k + 2] = 0;
- }
- }
- }
-
- glTexImage2D(GL_TEXTURE_2D, level, GL_RGB, width, height, 0,
- GL_RGB, GL_UNSIGNED_BYTE, img);
-}
-
-
-static void makeImages(void)
-{
- static const GLubyte colors[8][3] = {
- {128, 128, 128 },
- { 0, 255, 255 },
- { 255, 255, 0 },
- { 255, 0, 255 },
- { 255, 0, 0 },
- { 0, 255, 0 },
- { 0, 0, 255 },
- { 255, 255, 255 }
- };
- int i, sz = 128;
-
- for (i = 0; i < 8; i++) {
- MakeImage(i, sz, sz, colors[i]);
- sz /= 2;
- }
-}
-
-static void myinit(void)
-{
- InitValues();
-
- glEnable(GL_DEPTH_TEST);
- glDepthFunc(GL_LESS);
- glShadeModel(GL_FLAT);
-
- glTranslatef(0.0, 0.0, -3.6);
-
- glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- makeImages();
- 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);
-}
-
-static void display(void)
-{
- GLfloat tcm = 4.0;
- printf("BASE_LEVEL=%d MAX_LEVEL=%d MIN_LOD=%.2g MAX_LOD=%.2g Bias=%.2g Filter=%s\n",
- BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
- NearestFilter ? "NEAREST" : "LINEAR");
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
-
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
-
- if (NearestFilter) {
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
- GL_NEAREST_MIPMAP_NEAREST);
- }
- else {
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
- glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
- GL_LINEAR_MIPMAP_LINEAR);
- }
-
- glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias);
-
- 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, tcm); glVertex3f(-2.0, 1.0, 0.0);
- glTexCoord2f(tcm, tcm); glVertex3f(3000.0, 1.0, -6000.0);
- glTexCoord2f(tcm, 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 'b':
- BaseLevel--;
- if (BaseLevel < 0)
- BaseLevel = 0;
- break;
- case 'B':
- BaseLevel++;
- if (BaseLevel > 10)
- BaseLevel = 10;
- break;
- case 'm':
- MaxLevel--;
- if (MaxLevel < 0)
- MaxLevel = 0;
- break;
- case 'M':
- MaxLevel++;
- if (MaxLevel > 10)
- MaxLevel = 10;
- break;
- case 'l':
- LodBias -= 0.25;
- break;
- case 'L':
- LodBias += 0.25;
- break;
- case 'n':
- MinLod -= 0.25;
- break;
- case 'N':
- MinLod += 0.25;
- break;
- case 'x':
- MaxLod -= 0.25;
- break;
- case 'X':
- MaxLod += 0.25;
- break;
- case 'f':
- NearestFilter = !NearestFilter;
- break;
- case ' ':
- InitValues();
- break;
- case 27: /* Escape */
- exit(0);
- break;
- default:
- return;
- }
- glutPostRedisplay();
-}
-
-
-static void usage(void)
-{
- printf("usage:\n");
- printf(" b/B decrease/increase GL_TEXTURE_BASE_LEVEL\n");
- printf(" m/M decrease/increase GL_TEXTURE_MAX_LEVEL\n");
- printf(" n/N decrease/increase GL_TEXTURE_MIN_LOD\n");
- printf(" x/X decrease/increase GL_TEXTURE_MAX_LOD\n");
- printf(" l/L decrease/increase GL_TEXTURE_LOD_BIAS\n");
- printf(" f toggle nearest/linear filtering\n");
- printf(" SPACE reset values\n");
-}
-
-
-int main(int argc, char** argv)
-{
- glutInit(&argc, argv);
- glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize (600, 600);
- glutCreateWindow (argv[0]);
- myinit();
- glutReshapeFunc (myReshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- usage();
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
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