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exercise min/max lod

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This commit is contained in:
Keith Whitwell
2006-06-21 14:04:04 +00:00
parent 942b5b7bc0
commit 5fb9f80e37
1 changed files with 21 additions and 2 deletions
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23
progs/tests/mipmap_limits.c
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@@ -54,6 +54,7 @@
#include <GL/glut.h> #include <GL/glut.h>
static GLint BaseLevel = 0, MaxLevel = 8; static GLint BaseLevel = 0, MaxLevel = 8;
static GLfloat MinLod = -1, MaxLod = 9;
static GLfloat LodBias = 0.0; static GLfloat LodBias = 0.0;
static GLboolean NearestFilter = GL_TRUE; static GLboolean NearestFilter = GL_TRUE;
@@ -124,12 +125,15 @@ static void myinit(void)
static void display(void) static void display(void)
{ {
GLfloat tcm = 4.0; GLfloat tcm = 4.0;
printf("GL_TEXTURE_BASE_LEVEL = %d GL_TEXTURE_MAX_LEVEL = %d Bias = %.2g filter = %s\n", printf("BASE_LEVEL = %d MAX_LEVEL = %d MIN_LOD = %f MAX_LOD = %f Bias = %.2g filter = %s\n",
BaseLevel, MaxLevel, LodBias, BaseLevel, MaxLevel, MinLod, MaxLod, LodBias,
NearestFilter ? "LINEAR" : "NEAREST"); NearestFilter ? "LINEAR" : "NEAREST");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_LOD, MinLod);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LOD, MaxLod);
if (NearestFilter) { if (NearestFilter) {
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
@@ -195,6 +199,18 @@ key(unsigned char k, int x, int y)
case 'L': case 'L':
LodBias += 0.02; LodBias += 0.02;
break; break;
case 'n':
MinLod -= 0.02;
break;
case 'N':
MinLod += 0.02;
break;
case 'x':
MaxLod -= 0.02;
break;
case 'X':
MaxLod += 0.02;
break;
case 'f': case 'f':
NearestFilter = !NearestFilter; NearestFilter = !NearestFilter;
break; break;
@@ -213,6 +229,9 @@ static void usage(void)
printf("usage:\n"); printf("usage:\n");
printf(" b/B decrease/increase GL_TEXTURE_BASE_LEVEL\n"); printf(" b/B decrease/increase GL_TEXTURE_BASE_LEVEL\n");
printf(" m/M decrease/increase GL_TEXTURE_MAX_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(" f toggle nearest/linear filtering\n");
} }