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Added menu options to test border modes and linear/nearest filtering.

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Adjust texcoords so we always have to sample the border.
Other misc changes.
This commit is contained in:
Brian Paul 2004-05-06 20:27:32 +00:00
parent eec8dbd512
commit 1229100703
1 changed files with 70 additions and 7 deletions
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77
progs/tests/texrect.c
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@ -1,4 +1,4 @@
/* $Id: texrect.c,v 1.4 2003/05/30 15:37:47 brianp Exp $ */
/* $Id: texrect.c,v 1.5 2004/05/06 20:27:32 brianp Exp $ */
/* GL_NV_texture_rectangle test
*
@ -21,9 +21,14 @@
#define TEX0 1
#define TEX7 8
#define ANIMATE 10
#define CLAMP 20
#define CLAMP_TO_EDGE 21
#define CLAMP_TO_BORDER 22
#define LINEAR_FILTER 30
#define NEAREST_FILTER 31
#define QUIT 100
static GLboolean Animate = GL_TRUE;
static GLboolean Animate = GL_FALSE;
static GLint NumUnits = 2;
static GLboolean TexEnabled[8];
static GLint Width[8], Height[8]; /* image sizes */
@ -34,7 +39,7 @@ static GLfloat Xrot = 00.0, Yrot = 00.0, Zrot = 0.0;
static void Idle( void )
{
Zrot += 1.0;
Zrot = glutGet(GLUT_ELAPSED_TIME) * 0.01;
glutPostRedisplay();
}
@ -42,7 +47,7 @@ static void Idle( void )
static void DrawObject(void)
{
GLint i;
GLfloat d = 0; /* set this >0 to test clamping */
GLfloat d = 10; /* so we can see how borders are handled */
glColor3f(.1, .1, .1); /* modulate this */
@ -57,11 +62,11 @@ static void DrawObject(void)
glVertex2f(-1.0, -1.0);
for (i = 0; i < NumUnits; i++)
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, -3);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, -d);
glVertex2f(1.0, -1.0);
for (i = 0; i < NumUnits; i++)
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+3);
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i, Width[i]+d, Height[i]+d);
glVertex2f(1.0, 1.0);
for (i = 0; i < NumUnits; i++)
@ -103,9 +108,10 @@ static void Reshape( int width, int height )
static void ModeMenu(int entry)
{
GLint i;
if (entry >= TEX0 && entry < TEX0 + NumUnits) {
/* toggle */
GLint i = entry - TEX0;
i = entry - TEX0;
TexEnabled[i] = !TexEnabled[i];
glActiveTextureARB(GL_TEXTURE0_ARB + i);
if (TexEnabled[i]) {
@ -126,6 +132,42 @@ static void ModeMenu(int entry)
else
glutIdleFunc(NULL);
}
else if (entry==CLAMP) {
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP);
}
}
else if (entry==CLAMP_TO_EDGE) {
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
}
}
else if (entry==CLAMP_TO_BORDER) {
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
}
}
else if (entry==NEAREST_FILTER) {
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
}
}
else if (entry==LINEAR_FILTER) {
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
}
}
else if (entry==QUIT) {
exit(0);
}
@ -139,6 +181,19 @@ static void Key( unsigned char key, int x, int y )
(void) x;
(void) y;
switch (key) {
case 'z':
Zrot -= 1.0;
break;
case 'Z':
Zrot += 1.0;
break;
case 'a':
Animate = !Animate;
if (Animate)
glutIdleFunc(Idle);
else
glutIdleFunc(NULL);
break;
case 27:
exit(0);
break;
@ -173,6 +228,7 @@ static void SpecialKey( int key, int x, int y )
static void Init( int argc, char *argv[] )
{
const GLenum wrap = GL_CLAMP;
GLuint texObj[8];
GLint size, i;
@ -213,6 +269,8 @@ static void Init( int argc, char *argv[] )
GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV,
GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_S, wrap);
glTexParameteri(GL_TEXTURE_RECTANGLE_NV, GL_TEXTURE_WRAP_T, wrap);
if (i == 0) {
GLubyte *img = LoadRGBImage(TEXTURE_0_FILE, &Width[0], &Height[0],
@ -289,6 +347,11 @@ int main( int argc, char *argv[] )
glutAddMenuEntry(s, TEX0 + i);
}
glutAddMenuEntry("Toggle Animation", ANIMATE);
glutAddMenuEntry("GL_CLAMP", CLAMP);
glutAddMenuEntry("GL_CLAMP_TO_EDGE", CLAMP_TO_EDGE);
glutAddMenuEntry("GL_CLAMP_TO_BORDER", CLAMP_TO_BORDER);
glutAddMenuEntry("GL_NEAREST", NEAREST_FILTER);
glutAddMenuEntry("GL_LINEAR", LINEAR_FILTER);
glutAddMenuEntry("Quit", QUIT);
glutAttachMenu(GLUT_RIGHT_BUTTON);