summaryrefslogtreecommitdiff
path: root/progs/tests/mipmap_limits.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/tests/mipmap_limits.c')
-rw-r--r--progs/tests/mipmap_limits.c352
1 files changed, 0 insertions, 352 deletions
diff --git a/progs/tests/mipmap_limits.c b/progs/tests/mipmap_limits.c
deleted file mode 100644
index 9418e90981..0000000000
--- a/progs/tests/mipmap_limits.c
+++ /dev/null
@@ -1,352 +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- * Unpublished-- rights reserved under the copyright laws of the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.
- */
-/* 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>
-
-#include "readtex.h"
-
-#define TEXTURE_FILE "../images/girl.rgb"
-
-static GLint BaseLevel = 0, MaxLevel = 9;
-static GLfloat MinLod = -1, MaxLod = 9;
-static GLfloat LodBias = 0.0;
-static GLboolean NearestFilter = GL_TRUE;
-static GLuint texImage, texColor, texCurrent;
-
-
-static void
-InitValues(void)
-{
- BaseLevel = 0;
- MaxLevel = 9;
- 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[512 * 512 * 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(int image)
-{
-#define WIDTH 512
-#define HEIGHT 512
- if (glutExtensionSupported("GL_SGIS_generate_mipmap") && image) {
- /* test auto mipmap generation */
- GLint width, height, i;
- GLenum format;
- GLubyte *image = LoadRGBImage(TEXTURE_FILE, &width, &height, &format);
- if (!image) {
- printf("Error: could not load texture image %s\n", TEXTURE_FILE);
- exit(1);
- }
- /* resize */
- if (width != WIDTH || height != HEIGHT) {
- GLubyte *newImage = malloc(WIDTH * HEIGHT * 4);
- gluScaleImage(format, width, height, GL_UNSIGNED_BYTE, image,
- WIDTH, HEIGHT, GL_UNSIGNED_BYTE, newImage);
- free(image);
- image = newImage;
- }
- printf("Using GL_SGIS_generate_mipmap\n");
- glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_TRUE);
- glTexImage2D(GL_TEXTURE_2D, 0, format, WIDTH, HEIGHT, 0,
- format, GL_UNSIGNED_BYTE, image);
- glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP_SGIS, GL_FALSE);
- free(image);
-
- /* make sure mipmap was really generated correctly */
- width = WIDTH;
- height = HEIGHT;
- for (i = 0; i < 10; i++) {
- GLint w, h;
- glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_WIDTH, &w);
- glGetTexLevelParameteriv(GL_TEXTURE_2D, i, GL_TEXTURE_HEIGHT, &h);
- printf("Level %d size: %d x %d\n", i, w, h);
- width /= 2;
- height /= 2;
- }
- }
- else {
- static const GLubyte colors[10][3] = {
- {128, 128, 128},
- {0, 255, 255},
- {255, 255, 0},
- {255, 0, 255},
- {255, 0, 0},
- {0, 255, 0},
- {0, 0, 255},
- {0, 255, 255},
- {255, 255, 0},
- {255, 255, 255}
- };
- int i, sz = 512;
-
- for (i = 0; i < 10; i++) {
- MakeImage(i, sz, sz, colors[i]);
- printf("Level %d size: %d x %d\n", i, sz, sz);
- 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);
- glGenTextures(1, &texImage);
- glBindTexture(GL_TEXTURE_2D, texImage);
- makeImages(1);
- glGenTextures(1, &texColor);
- glBindTexture(GL_TEXTURE_2D, texColor);
- makeImages(0);
-
- texCurrent = texImage;
-
- 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 = 1.0;
- glBindTexture(GL_TEXTURE_2D, texCurrent);
-
- 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 * 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
-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(" t toggle texture color/image\n");
- printf(" SPACE reset values\n");
-}
-
-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 't':
- if (texCurrent == texColor)
- texCurrent = texImage;
- else
- texCurrent = texColor;
- break;
- case ' ':
- InitValues();
- /* fall-through */
- case 'u':
- usage();
- break;
- 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(600, 600);
- glutCreateWindow(argv[0]);
- glewInit();
- myinit();
- glutReshapeFunc(myReshape);
- glutDisplayFunc(display);
- glutKeyboardFunc(key);
- usage();
- glutMainLoop();
- return 0; /* ANSI C requires main to return int. */
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-23 04:36:56 +0000