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new texture image, cleaned-up code

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This commit is contained in:
Brian Paul
1999-11-02 15:09:04 +00:00
parent 306b3b02b7
commit d51b2c99d5
1 changed files with 48 additions and 48 deletions
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96
progs/demos/paltex.c
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@@ -1,13 +1,17 @@
/* $Id: paltex.c,v 1.1 1999/08/19 00:55:40 jtg Exp $ */ /* $Id: paltex.c,v 1.2 1999/11/02 15:09:04 brianp Exp $ */
/* /*
* Paletted texture demo. Written by Brian Paul. This file in public domain. * Paletted texture demo. Written by Brian Paul.
* This program is in the public domain.
*/ */
/* /*
* $Log: paltex.c,v $ * $Log: paltex.c,v $
* Revision 1.1 1999/08/19 00:55:40 jtg * Revision 1.2 1999/11/02 15:09:04 brianp
* Initial revision * new texture image, cleaned-up code
*
* Revision 1.1.1.1 1999/08/19 00:55:40 jtg
* Imported sources
* *
* Revision 3.1 1999/03/28 18:20:49 brianp * Revision 3.1 1999/03/28 18:20:49 brianp
* minor clean-up * minor clean-up
@@ -42,10 +46,10 @@ static void Display( void )
glRotatef(Rot, 0, 0, 1); glRotatef(Rot, 0, 0, 1);
glBegin(GL_POLYGON); glBegin(GL_POLYGON);
glTexCoord2f(0, 1); glVertex2f(-1, -1); glTexCoord2f(0, 1); glVertex2f(-1, -0.5);
glTexCoord2f(1, 1); glVertex2f( 1, -1); glTexCoord2f(1, 1); glVertex2f( 1, -0.5);
glTexCoord2f(1, 0); glVertex2f( 1, 1); glTexCoord2f(1, 0); glVertex2f( 1, 0.5);
glTexCoord2f(0, 0); glVertex2f(-1, 1); glTexCoord2f(0, 0); glVertex2f(-1, 0.5);
glEnd(); glEnd();
glPopMatrix(); glPopMatrix();
@@ -62,7 +66,7 @@ static void Reshape( int width, int height )
glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 ); glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
glMatrixMode( GL_MODELVIEW ); glMatrixMode( GL_MODELVIEW );
glLoadIdentity(); glLoadIdentity();
glTranslatef( 0.0, 0.0, -15.0 ); glTranslatef( 0.0, 0.0, -7.0 );
} }
@@ -79,37 +83,20 @@ static void Key( unsigned char key, int x, int y )
} }
static void SpecialKey( int key, int x, int y )
{
(void) x;
(void) y;
switch (key) {
case GLUT_KEY_UP:
break;
case GLUT_KEY_DOWN:
break;
case GLUT_KEY_LEFT:
break;
case GLUT_KEY_RIGHT:
break;
}
glutPostRedisplay();
}
static void Init( void ) static void Init( void )
{ {
GLubyte texture[8][8] = { /* PT = Paletted Texture! */ #define HEIGHT 8
{ 0, 0, 0, 0, 0, 0, 0, 0}, #define WIDTH 32
{ 0, 100, 100, 100, 0, 180, 180, 180}, static char texture[HEIGHT][WIDTH] = {
{ 0, 100, 0, 100, 0, 0, 180, 0}, " ",
{ 0, 100, 0, 100, 0, 0, 180, 0}, " MMM EEEE SSS AAA ",
{ 0, 100, 100, 100, 0, 0, 180, 0}, " M M M E S S A A ",
{ 0, 100, 0, 0, 0, 0, 180, 0}, " M M M EEEE SS A A ",
{ 0, 100, 0, 0, 0, 0, 180, 0}, " M M M E SS AAAAA ",
{ 0, 100, 255, 0, 0, 0, 180, 250}, " M M E S S A A ",
}; " M M EEEE SSS A A ",
" "
};
GLubyte table[256][4]; GLubyte table[256][4];
int i; int i;
@@ -118,17 +105,31 @@ static void Init( void )
exit(0); exit(0);
} }
/* put some wacky colors into the texture palette */ /* load the color table for each texel-index */
for (i=0;i<256;i++) { table[' '][0] = 50;
table[i][0] = i; table[' '][1] = 50;
table[i][1] = 0; table[' '][2] = 50;
table[i][2] = 127 + i / 2; table[' '][3] = 50;
table[i][3] = 255; table['M'][0] = 255;
} table['M'][1] = 0;
table['M'][2] = 0;
table['M'][3] = 0;
table['E'][0] = 0;
table['E'][1] = 255;
table['E'][2] = 0;
table['E'][3] = 0;
table['S'][0] = 40;
table['S'][1] = 40;
table['S'][2] = 255;
table['S'][3] = 0;
table['A'][0] = 255;
table['A'][1] = 255;
table['A'][2] = 0;
table['A'][3] = 0;
#ifdef GL_EXT_paletted_texture #ifdef GL_EXT_paletted_texture
#if defined(GL_EXT_shared_texture_palette) && defined(SHARED_PALETTE) #if defined(GL_EXT_shared_texture_palette) && defined(USE_SHARED_PALETTE)
printf("Using shared palette\n"); printf("Using shared palette\n");
glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, /* target */ glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, /* target */
GL_RGBA, /* internal format */ GL_RGBA, /* internal format */
@@ -149,7 +150,7 @@ static void Init( void )
glTexImage2D(GL_TEXTURE_2D, /* target */ glTexImage2D(GL_TEXTURE_2D, /* target */
0, /* level */ 0, /* level */
GL_COLOR_INDEX8_EXT, /* internal format */ GL_COLOR_INDEX8_EXT, /* internal format */
8, 8, /* width, height */ WIDTH, HEIGHT, /* width, height */
0, /* border */ 0, /* border */
GL_COLOR_INDEX, /* texture format */ GL_COLOR_INDEX, /* texture format */
GL_UNSIGNED_BYTE, /* texture type */ GL_UNSIGNED_BYTE, /* texture type */
@@ -177,7 +178,6 @@ int main( int argc, char *argv[] )
glutReshapeFunc( Reshape ); glutReshapeFunc( Reshape );
glutKeyboardFunc( Key ); glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display ); glutDisplayFunc( Display );
glutIdleFunc( Idle ); glutIdleFunc( Idle );