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authorBrian Paul <brian.paul@tungstengraphics.com>2006-05-11 01:15:48 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2006-05-11 01:15:48 +0000
commitfa489dd04326fa0fcf05b078ae3700f379793f21 (patch)
tree0ce0d3ea71ec6a193b4fa00bf3261a6e7e11ff35 /progs/tests
parentaecd02b391c6719210d14ae10dbeb064fb2359eb (diff)
simplify image setup code, added LOD Bias control (l/L keys)
Diffstat (limited to 'progs/tests')
-rw-r--r--progs/tests/mipmap_limits.c138
1 files changed, 62 insertions, 76 deletions
diff --git a/progs/tests/mipmap_limits.c b/progs/tests/mipmap_limits.c
index c089bb52c7..6f6d893f77 100644
--- a/progs/tests/mipmap_limits.c
+++ b/progs/tests/mipmap_limits.c
@@ -53,66 +53,56 @@
#include <stdio.h>
#include <GL/glut.h>
-GLubyte mipmapImage64[64][64][3];
-GLubyte mipmapImage32[32][32][3];
-GLubyte mipmapImage16[16][16][3];
-GLubyte mipmapImage8[8][8][3];
-GLubyte mipmapImage4[4][4][3];
-GLubyte mipmapImage2[2][2][3];
-GLubyte mipmapImage1[1][1][3];
-
static GLint BaseLevel = 0, MaxLevel = 8;
+static GLfloat LodBias = 0.0;
static GLboolean NearestFilter = GL_TRUE;
+
+static void MakeImage(int level, int width, int height, const GLubyte color[4])
+{
+ const int makeStripes = 0;
+ GLubyte img[256*256*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(void)
{
- int i, j;
-
- for (i = 0; i < 64; i++) {
- for (j = 0; j < 64; j++) {
- mipmapImage64[i][j][0] = 0;
- mipmapImage64[i][j][1] = 255;
- mipmapImage64[i][j][2] = 255;
- }
- }
- for (i = 0; i < 32; i++) {
- for (j = 0; j < 32; j++) {
- mipmapImage32[i][j][0] = 255;
- mipmapImage32[i][j][1] = 255;
- mipmapImage32[i][j][2] = 0;
- }
- }
- for (i = 0; i < 16; i++) {
- for (j = 0; j < 16; j++) {
- mipmapImage16[i][j][0] = 255;
- mipmapImage16[i][j][1] = 0;
- mipmapImage16[i][j][2] = 255;
- }
- }
- for (i = 0; i < 8; i++) {
- for (j = 0; j < 8; j++) {
- mipmapImage8[i][j][0] = 255;
- mipmapImage8[i][j][1] = 0;
- mipmapImage8[i][j][2] = 0;
- }
- }
- for (i = 0; i < 4; i++) {
- for (j = 0; j < 4; j++) {
- mipmapImage4[i][j][0] = 0;
- mipmapImage4[i][j][1] = 255;
- mipmapImage4[i][j][2] = 0;
- }
- }
- for (i = 0; i < 2; i++) {
- for (j = 0; j < 2; j++) {
- mipmapImage2[i][j][0] = 0;
- mipmapImage2[i][j][1] = 0;
- mipmapImage2[i][j][2] = 255;
- }
- }
- mipmapImage1[0][0][0] = 255;
- mipmapImage1[0][0][1] = 255;
- mipmapImage1[0][0][2] = 255;
+ static const GLubyte colors[8][3] = {
+ {128, 128, 128 },
+ { 0, 255, 255 },
+ { 255, 255, 0 },
+ { 255, 0, 255 },
+ { 255, 0, 0 },
+ { 0, 255, 0 },
+ { 0, 0, 255 },
+ { 255, 255, 255 }
+ };
+ int i, sz = 128;
+
+ for (i = 0; i < 8; i++) {
+ MakeImage(i, sz, sz, colors[i]);
+ sz /= 2;
+ }
}
static void myinit(void)
@@ -122,22 +112,9 @@ static void myinit(void)
glShadeModel(GL_FLAT);
glTranslatef(0.0, 0.0, -3.6);
- makeImages();
+
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
- glTexImage2D(GL_TEXTURE_2D, 0, 3, 64, 64, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage64[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 1, 3, 32, 32, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage32[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 2, 3, 16, 16, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage16[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 3, 3, 8, 8, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage8[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 4, 3, 4, 4, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage4[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 5, 3, 2, 2, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage2[0][0][0]);
- glTexImage2D(GL_TEXTURE_2D, 6, 3, 1, 1, 0,
- GL_RGB, GL_UNSIGNED_BYTE, &mipmapImage1[0][0][0]);
+ makeImages();
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);
@@ -146,8 +123,9 @@ static void myinit(void)
static void display(void)
{
- printf("GL_TEXTURE_BASE_LEVEL = %d GL_TEXTURE_MAX_LEVEL = %d filter = %s\n",
- BaseLevel, MaxLevel,
+ GLfloat tcm = 4.0;
+ printf("GL_TEXTURE_BASE_LEVEL = %d GL_TEXTURE_MAX_LEVEL = %d Bias = %.2g filter = %s\n",
+ BaseLevel, MaxLevel, LodBias,
NearestFilter ? "LINEAR" : "NEAREST");
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
@@ -163,12 +141,14 @@ static void display(void)
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, 8.0); glVertex3f(-2.0, 1.0, 0.0);
- glTexCoord2f(8.0, 8.0); glVertex3f(3000.0, 1.0, -6000.0);
- glTexCoord2f(8.0, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
+ glTexCoord2f(0.0, tcm); glVertex3f(-2.0, 1.0, 0.0);
+ glTexCoord2f(tcm, tcm); glVertex3f(3000.0, 1.0, -6000.0);
+ glTexCoord2f(tcm, 0.0); glVertex3f(3000.0, -1.0, -6000.0);
glEnd();
glFlush();
}
@@ -209,6 +189,12 @@ key(unsigned char k, int x, int y)
if (MaxLevel > 10)
MaxLevel = 10;
break;
+ case 'l':
+ LodBias -= 0.02;
+ break;
+ case 'L':
+ LodBias += 0.02;
+ break;
case 'f':
NearestFilter = !NearestFilter;
break;
@@ -235,7 +221,7 @@ int main(int argc, char** argv)
{
glutInit(&argc, argv);
glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize (500, 500);
+ glutInitWindowSize (600, 600);
glutCreateWindow (argv[0]);
myinit();
glutReshapeFunc (myReshape);