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Diffstat (limited to 'progs/tests/mipmap_limits.c')
-rw-r--r-- | progs/tests/mipmap_limits.c | 352 |
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 - * Unpublished-- rights reserved under the copyright laws of the - * United States.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. */ -} |