OpenHarmony/third_party_mesa3d
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Only emit texcoords for enabled units. Enable/disable units with 0..7 keys.

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Also, asst. clean-ups.
This commit is contained in:
Brian
2007-11-16 15:17:37 -07:00
parent 96ba38a450
commit fb69fe58a0
1 changed files with 65 additions and 58 deletions
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123
progs/demos/multiarb.c
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@@ -1,4 +1,3 @@
/*
* GL_ARB_multitexture demo
*
@@ -32,7 +31,6 @@ static GLint NumUnits = 1;
static GLboolean TexEnabled[8];
static GLfloat Drift = 0.0;
static GLfloat drift_increment = 0.005;
static GLfloat Xrot = 20.0, Yrot = 30.0, Zrot = 0.0;
@@ -41,9 +39,7 @@ static void Idle( void )
if (Animate) {
GLint i;
Drift += drift_increment;
if (Drift >= 1.0)
Drift = 0.0;
Drift = glutGet(GLUT_ELAPSED_TIME) * 0.001;
for (i = 0; i < NumUnits; i++) {
glActiveTextureARB(GL_TEXTURE0_ARB + i);
@@ -57,10 +53,11 @@ static void Idle( void )
glTranslatef(0.0, Drift, 0.0);
}
else {
glTranslatef(0.5, 0.5, 0.0);
float tx = 0.5, ty = 0.5;
glTranslatef(tx, ty, 0.0);
glRotatef(180.0 * Drift, 0, 0, 1);
glScalef(1.0/i, 1.0/i, 1.0/i);
glTranslatef(-0.5, -0.5, 0.0);
glTranslatef(-tx, -ty + i * 0.1, 0.0);
}
}
glMatrixMode(GL_MODELVIEW);
@@ -72,10 +69,9 @@ static void Idle( void )
static void DrawObject(void)
{
GLint i;
GLint j;
static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 };
static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 };
static const GLfloat tex_coords[] = { 0.0, 0.0, 1.0, 1.0, 0.0 };
static const GLfloat vtx_coords[] = { -1.0, -1.0, 1.0, 1.0, -1.0 };
GLint i, j;
if (!TexEnabled[0] && !TexEnabled[1])
glColor3f(0.1, 0.1, 0.1); /* add onto this */
@@ -83,37 +79,20 @@ static void DrawObject(void)
glColor3f(1, 1, 1); /* modulate this */
glBegin(GL_QUADS);
/* Toggle between the vector and scalar entry points. This is done purely
* to hit multiple paths in the driver.
*/
if ( Drift > 0.49 ) {
for (j = 0; j < 4; j++ ) {
for (i = 0; i < NumUnits; i++)
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i,
tex_coords[j], tex_coords[j+1]);
glVertex2f( vtx_coords[j], vtx_coords[j+1] );
for (j = 0; j < 4; j++ ) {
for (i = 0; i < NumUnits; i++) {
if (TexEnabled[i])
glMultiTexCoord2fARB(GL_TEXTURE0_ARB + i,
tex_coords[j], tex_coords[j+1]);
}
glVertex2f( vtx_coords[j], vtx_coords[j+1] );
}
else {
for (j = 0; j < 4; j++ ) {
for (i = 0; i < NumUnits; i++)
glMultiTexCoord2fvARB(GL_TEXTURE0_ARB + i, & tex_coords[j]);
glVertex2fv( & vtx_coords[j] );
}
}
glEnd();
}
static void Display( void )
{
static GLint T0 = 0;
static GLint Frames = 0;
GLint t;
glClear( GL_COLOR_BUFFER_BIT );
glPushMatrix();
@@ -125,16 +104,6 @@ static void Display( void )
glPopMatrix();
glutSwapBuffers();
Frames++;
t = glutGet(GLUT_ELAPSED_TIME);
if (t - T0 >= 250) {
GLfloat seconds = (t - T0) / 1000.0;
drift_increment = 2.2 * seconds / Frames;
T0 = t;
Frames = 0;
}
}
@@ -151,24 +120,34 @@ static void Reshape( int width, int height )
}
static void ToggleUnit(int unit)
{
TexEnabled[unit] = !TexEnabled[unit];
glActiveTextureARB(GL_TEXTURE0_ARB + unit);
if (TexEnabled[unit])
glEnable(GL_TEXTURE_2D);
else
glDisable(GL_TEXTURE_2D);
printf("Enabled: ");
for (unit = 0; unit < NumUnits; unit++)
printf("%d ", (int) TexEnabled[unit]);
printf("\n");
}
static void ModeMenu(int entry)
{
if (entry >= TEX0 && entry <= TEX7) {
/* toggle */
GLint i = entry - TEX0;
TexEnabled[i] = !TexEnabled[i];
glActiveTextureARB(GL_TEXTURE0_ARB + i);
if (TexEnabled[i])
glEnable(GL_TEXTURE_2D);
else
glDisable(GL_TEXTURE_2D);
printf("Enabled: ");
for (i = 0; i < NumUnits; i++)
printf("%d ", (int) TexEnabled[i]);
printf("\n");
ToggleUnit(i);
}
else if (entry==ANIMATE) {
Animate = !Animate;
if (Animate)
glutIdleFunc(Idle);
else
glutIdleFunc(NULL);
}
else if (entry==QUIT) {
exit(0);
@@ -183,9 +162,36 @@ static void Key( unsigned char key, int x, int y )
(void) x;
(void) y;
switch (key) {
case 27:
exit(0);
break;
case 'a':
Animate = !Animate;
break;
case '0':
ToggleUnit(0);
break;
case '1':
ToggleUnit(1);
break;
case '2':
ToggleUnit(2);
break;
case '3':
ToggleUnit(3);
break;
case '4':
ToggleUnit(4);
break;
case '5':
ToggleUnit(5);
break;
case '6':
ToggleUnit(6);
break;
case '7':
ToggleUnit(7);
break;
case 27:
exit(0);
break;
}
glutPostRedisplay();
}
@@ -327,7 +333,8 @@ int main( int argc, char *argv[] )
glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display );
glutIdleFunc( Idle );
if (Animate)
glutIdleFunc(Idle);
glutCreateMenu(ModeMenu);