Press <space> to reset limit/bias values, clean-up limit/bias printf

progs/tests/mipmap_limits.c

 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;
 
 static void myinit(void)
 {
+    InitValues();
+
     glEnable(GL_DEPTH_TEST);
     glDepthFunc(GL_LESS);
     glShadeModel(GL_FLAT);
 static void display(void)
 {
    GLfloat tcm = 4.0;
-    printf("BASE_LEVEL = %d  MAX_LEVEL = %d  MIN_LOD = %f MAX_LOD = %f Bias = %.2g  filter = %s\n",
+    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);
   case 'f':
      NearestFilter = !NearestFilter;
      break;
+  case ' ':
+     InitValues();
+     break;
   case 27:  /* Escape */
     exit(0);
     break;
 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("  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");
 }