src/tests/mipmap_comp_tests.c

   1 /* Copyright (c) Mark J. Kilgard, 1994. */
   2 /*
   3  * (c) Copyright 1993, Silicon Graphics, Inc.
   4  * ALL RIGHTS RESERVED
   5  * Permission to use, copy, modify, and distribute this software for
   6  * any purpose and without fee is hereby granted, provided that the above
   7  * copyright notice appear in all copies and that both the copyright notice
   8  * and this permission notice appear in supporting documentation, and that
   9  * the name of Silicon Graphics, Inc. not be used in advertising
  10  * or publicity pertaining to distribution of the software without specific,
  11  * written prior permission.
  12  *
  13  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  14  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  16  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  17  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  18  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
  19  * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
  20  * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
  21  * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
  22  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  23  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  24  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
  25  *
  26  * US Government Users Restricted Rights
  27  * Use, duplication, or disclosure by the Government is subject to
  28  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  29  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  30  * clause at DFARS 252.227-7013 and/or in similar or successor
  31  * clauses in the FAR or the DOD or NASA FAR Supplement.
  32  * Unpublished-- rights reserved under the copyright laws of the
  33  * United States.  Contractor/manufacturer is Silicon Graphics,
  34  * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
  35  *
  36  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  37  */
  38
  39 /* mipmap_comp
  40  * Test compressed texture mipmaps
  41  *
  42  * Based on mipmap_limits
  43  */
  44
  45 #include <string.h>
  46 #include <stdlib.h>
  47 #include <stdio.h>
  48 #include <GL/glew.h>
  49 #include "glut_wrap.h"
  50
  51 #define SIZE 16 /* not larger then 16 */
  52
  53 static GLint BaseLevel = 0, MaxLevel ;
  54 static GLfloat MinLod, MaxLod;
  55 static GLfloat LodBias;
  56 static GLboolean NearestFilter;
  57 static GLuint texImage;
  58 static GLuint View;
  59
  60 struct view {
  61    GLfloat minLod;
  62    GLfloat maxLod;
  63    const char *string;
  64 };
  65
  66 static struct view views[] =
  67 {
  68    { 0, 0, "Green" },
  69    { 0, 1, "Green, Red" },
  70    { 0, 2, "Green, Red, Blue" },
  71    { 0, 3, "Green, Red, Blue, Black" },
  72    { 0, 4, "Green, Red, Blue, Black, White" },
  73    { 1, 4, "Red, Blue, Black, White" },
  74    { 2, 4, "Blue, Black, White" },
  75    { 3, 4, "Black, White" },
  76    { 4, 4, "White" },
  77    { 3, 3, "Black" },
  78    { 2, 2, "Blue" },
  79    { 1, 1, "Red" },
  80    { 1, 3, "Red, Blue, Black" },
  81    { 1, 2, "Red, Blue" },
  82    { 2, 3, "Blue, Black" },
  83    { 0, 0, NULL },
  84 };
  85
  86 static void
  87 initValues(void)
  88 {
  89    View = 12;
  90    BaseLevel = 0;
  91    MaxLevel = 9;
  92    MinLod = views[View].minLod;
  93    MaxLod = views[View].maxLod;
  94    LodBias = 5.0;
  95    NearestFilter = GL_TRUE;
  96 }
  97
  98
  99 static void
 100 changeView(void)
 101 {
 102    if (views[++View].string == NULL)
 103       View = 0;
 104
 105    MinLod = views[View].minLod;
 106    MaxLod = views[View].maxLod;
 107 }
 108
 109
 110 static void
 111 makeImage(int level, int width, int height)
 112 {
 113    GLubyte img[SIZE*SIZE*3];
 114    GLubyte color[5][3] = {
 115       {   0, 255,   0 },
 116       { 255,   0,   0 },
 117       {   0,   0, 255 },
 118       {   0,   0,   0 },
 119       { 255, 255, 255 },
 120    };
 121    int i, j;
 122
 123    for (i = 0; i < height; i++) {
 124       for (j = 0; j < width; j++) {
 125          int k = (i * width + j) * 3;
 126          img[k + 0] = color[level][0];
 127          img[k + 1] = color[level][1];
 128          img[k + 2] = color[level][2];
 129       }
 130    }
 131
 132    glTexImage2D(GL_TEXTURE_2D, level,
 133                 GL_COMPRESSED_RGB_S3TC_DXT1_EXT,
 134                 width, height, 0,
 135                 GL_RGB, GL_UNSIGNED_BYTE, img);
 136 }
 137
 138
 139 static void
 140 makeImages(void)
 141 {
 142    int i, sz;
 143
 144    for (i = 0, sz = SIZE; sz >= 1; i++, sz /= 2) {
 145       makeImage(i, sz, sz);
 146       printf("Level %d size: %d x %d\n", i, sz, sz);
 147    }
 148 }
 149
 150
 151 static void
 152 myInit(void)
 153 {
 154
 155    initValues();
 156
 157    glEnable(GL_DEPTH_TEST);
 158    glDepthFunc(GL_LESS);
 159    glShadeModel(GL_FLAT);
 160
 161    glTranslatef(0.0, 0.0, -3.6);
 162
 163    glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
 164    glGenTextures(1, &texImage);
 165    glBindTexture(GL_TEXTURE_2D, texImage);
 166    makeImages();
 167
 168    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
 169    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
 170    glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
 171    glEnable(GL_TEXTURE_2D);
 172 }
 173
 174
 175 static void
 176 display(void)
 177 {
 178    GLfloat tcm = 1.0;
 179    glBindTexture(GL_TEXTURE_2D, texImage);
 180
 181    printf("BASE_LEVEL=%d  MAX_LEVEL=%d  MIN_LOD=%.2g  MAX_LOD=%.2g  Bias=%.2g  Filter=%s\n",
 182          BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
 183          NearestFilter ? "NEAREST" : "LINEAR");
 184    printf("You should see: %s\n", views[View].string );
 185    fflush(stdout);
 186
 187    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
 188    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
 189
 190    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
 191    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
 192
 193    if (NearestFilter) {
 194       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
 195       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 196             GL_NEAREST_MIPMAP_NEAREST);
 197    }
 198    else {
 199       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
 200       glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
 201             GL_LINEAR_MIPMAP_LINEAR);
 202    }
 203
 204    glTexEnvf(GL_TEXTURE_FILTER_CONTROL_EXT, GL_TEXTURE_LOD_BIAS_EXT, LodBias);
 205
 206    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 207    glBegin(GL_QUADS);
 208    glTexCoord2f(0.0, 0.0); glVertex3f(-2.0, -1.0, 0.0);
 209    glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0);
 210    glTexCoord2f(tcm * 3000.0, tcm); glVertex3f(3000.0, 1.0, -6000.0);
 211    glTexCoord2f(tcm * 3000.0, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
 212    glEnd();
 213    glFlush();
 214 }
 215
 216
 217 static void
 218 myReshape(int w, int h)
 219 {
 220    glViewport(0, 0, w, h);
 221    glMatrixMode(GL_PROJECTION);
 222    glLoadIdentity();
 223    gluPerspective(60.0, 1.0*(GLfloat)w/(GLfloat)h, 1.0, 30000.0);
 224    glMatrixMode(GL_MODELVIEW);
 225    glLoadIdentity();
 226 }
 227
 228
 229 static void
 230 key(unsigned char k, int x, int y)
 231 {
 232   (void) x;
 233   (void) y;
 234   switch (k) {
 235 #if 0
 236   case 'b':
 237      BaseLevel--;
 238      if (BaseLevel < 0)
 239         BaseLevel = 0;
 240      break;
 241   case 'B':
 242      BaseLevel++;
 243      if (BaseLevel > 10)
 244         BaseLevel = 10;
 245      break;
 246   case 'm':
 247      MaxLevel--;
 248      if (MaxLevel < 0)
 249         MaxLevel = 0;
 250      break;
 251   case 'M':
 252      MaxLevel++;
 253      if (MaxLevel > 10)
 254         MaxLevel = 10;
 255      break;
 256   case 'l':
 257      LodBias -= 0.25;
 258      break;
 259   case 'L':
 260      LodBias += 0.25;
 261      break;
 262   case 'n':
 263      MinLod -= 0.25;
 264      break;
 265   case 'N':
 266      MinLod += 0.25;
 267      break;
 268   case 'x':
 269      MaxLod -= 0.25;
 270      break;
 271   case 'X':
 272      MaxLod += 0.25;
 273      break;
 274   case 'f':
 275      NearestFilter = !NearestFilter;
 276      break;
 277 #endif
 278   case ' ':
 279      initValues();
 280      break;
 281   case 27:  /* Escape */
 282     exit(0);
 283     break;
 284   default:
 285     changeView();
 286     break;
 287   }
 288   glutPostRedisplay();
 289 }
 290
 291
 292 static void
 293 usage(void)
 294 {
 295    printf("usage:\n");
 296    printf("  Any    Change view\n");
 297    printf("  SPACE  reset values\n");
 298 }
 299
 300
 301 int
 302 main(int argc, char** argv)
 303 {
 304     glutInit(&argc, argv);
 305     glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
 306     glutInitWindowSize (600, 600);
 307     glutCreateWindow (argv[0]);
 308     glewInit();
 309     myInit();
 310     glutReshapeFunc (myReshape);
 311     glutDisplayFunc(display);
 312     glutKeyboardFunc(key);
 313     usage();
 314     glutMainLoop();
 315     return 0;             /* ANSI C requires main to return int. */
 316 }