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mesa: more test options in progs/demos/textures.c

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This commit is contained in:
Brian Paul 2008-10-20 17:43:05 -06:00
parent abfc32a68c
commit 2278107b24
1 changed files with 87 additions and 17 deletions
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104
progs/demos/textures.c
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@ -9,6 +9,9 @@
#include <GL/glut.h>
#include "readtex.h"
#define TEST_CLAMP 0
#define TEST_MIPMAPS 0
#define MAX_TEXTURES 8
@ -16,7 +19,8 @@ static int Win;
static GLfloat Xrot = 0, Yrot = 0, Zrot = 0;
static GLboolean Anim = GL_TRUE;
static GLboolean Blend = GL_FALSE;
static GLboolean MipMap = 1+GL_FALSE;
static GLuint Filter = 0;
static GLboolean Clamp = GL_FALSE;
static GLuint NumTextures;
static GLuint Textures[MAX_TEXTURES];
@ -32,6 +36,22 @@ static const char *DefaultFiles[] = {
};
#define NUM_FILTERS 5
static
struct filter {
GLenum min, mag;
const char *name;
} FilterModes[NUM_FILTERS] = {
{ GL_NEAREST, GL_NEAREST, "Nearest,Nearest" },
{ GL_LINEAR, GL_LINEAR, "Linear,Linear" },
{ GL_NEAREST_MIPMAP_NEAREST, GL_NEAREST, "NearestMipmapNearest,Nearest" },
{ GL_LINEAR_MIPMAP_NEAREST, GL_LINEAR, "LinearMipmapNearest,Linear" },
{ GL_LINEAR_MIPMAP_LINEAR, GL_LINEAR, "LinearMipmapLinear,Linear" }
};
static void
Idle(void)
{
@ -58,10 +78,17 @@ DrawTextures(void)
glBindTexture(GL_TEXTURE_2D, Textures[i]);
glBegin(GL_POLYGON);
#if TEST_CLAMP
glTexCoord2f( -0.5, -0.5 ); glVertex2f( -ar, -1.0 );
glTexCoord2f( 1.5, -0.5 ); glVertex2f( ar, -1.0 );
glTexCoord2f( 1.5, 1.5 ); glVertex2f( ar, 1.0 );
glTexCoord2f( -0.5, 1.5 ); glVertex2f( -ar, 1.0 );
#else
glTexCoord2f( 0.0, 0.0 ); glVertex2f( -ar, -1.0 );
glTexCoord2f( 1.0, 0.0 ); glVertex2f( ar, -1.0 );
glTexCoord2f( 1.0, 1.0 ); glVertex2f( ar, 1.0 );
glTexCoord2f( 0.0, 1.0 ); glVertex2f( -ar, 1.0 );
#endif
glEnd();
glPopMatrix();
@ -137,19 +164,23 @@ Randomize(void)
static void
SetTexFilters(void)
SetTexParams(void)
{
GLuint i;
for (i = 0; i < NumTextures; i++) {
glBindTexture(GL_TEXTURE_2D, Textures[i]);
if (MipMap) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
FilterModes[Filter].min);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
FilterModes[Filter].mag);
if (Clamp) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
}
}
}
@ -163,6 +194,7 @@ Key(unsigned char key, int x, int y)
(void) y;
switch (key) {
case 'a':
case ' ':
Anim = !Anim;
if (Anim)
glutIdleFunc(Idle);
@ -172,12 +204,19 @@ Key(unsigned char key, int x, int y)
case 'b':
Blend = !Blend;
break;
case 'm':
MipMap = !MipMap;
SetTexFilters();
case 'f':
Filter = (Filter + 1) % NUM_FILTERS;
SetTexParams();
break;
case 'r':
Randomize();
break;
#if TEST_CLAMP
case 'c':
Clamp = !Clamp;
SetTexParams();
break;
#endif
case 'z':
Zrot -= step;
break;
@ -190,9 +229,9 @@ Key(unsigned char key, int x, int y)
break;
}
printf("Blend=%s MipMap=%s\n",
printf("Blend=%s Filter=%s\n",
Blend ? "Y" : "n",
MipMap ? "Y" : "n");
FilterModes[Filter].name);
glutPostRedisplay();
}
@ -231,15 +270,46 @@ LoadTextures(GLuint n, const char *files[])
glGenTextures(n, Textures);
SetTexParams();
for (i = 0; i < n; i++) {
GLint w, h;
glBindTexture(GL_TEXTURE_2D, Textures[i]);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
#if TEST_MIPMAPS
{
static const GLubyte color[9][4] = {
{255, 0, 0},
{0, 255, 0},
{0, 0, 255},
{0, 255, 255},
{255, 0, 255},
{255, 255, 0},
{255, 128, 255},
{128, 128, 128},
{64, 64, 64}
};
GLubyte image[256*256*4];
int i, level;
w = h = 256;
for (level = 0; level <= 8; level++) {
for (i = 0; i < w * h; i++) {
image[i*4+0] = color[level][0];
image[i*4+1] = color[level][1];
image[i*4+2] = color[level][2];
image[i*4+3] = color[level][3];
}
printf("Load level %d: %d x %d\n", level, w>>level, h>>level);
glTexImage2D(GL_TEXTURE_2D, level, GL_RGBA, w>>level, h>>level, 0,
GL_RGBA, GL_UNSIGNED_BYTE, image);
}
}
#else
if (!LoadRGBMipmaps2(files[i], GL_TEXTURE_2D, GL_RGB, &w, &h)) {
printf("Error: couldn't load %s\n", files[i]);
exit(1);
}
#endif
TexAspect[i] = (float) w / (float) h;
printf("Loaded %s\n", files[i]);
}
@ -277,7 +347,7 @@ Usage(void)
printf("Keys:\n");
printf(" a - toggle animation\n");
printf(" b - toggle blending\n");
printf(" m - toggle mipmapping\n");
printf(" f - change texture filter mode\n");
printf(" r - randomize\n");
printf(" ESC - exit\n");
}
@ -288,7 +358,7 @@ main(int argc, char *argv[])
{
glutInit(&argc, argv);
glutInitWindowPosition(0, 0);
glutInitWindowSize(400, 400);
glutInitWindowSize(700, 700);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
Win = glutCreateWindow(argv[0]);
glutReshapeFunc(Reshape);