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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 $
* Revision 1.1 1999/08/19 00:55:40 jtg
* Initial revision
* Revision 1.2 1999/11/02 15:09:04 brianp
* 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
* minor clean-up
@@ -42,10 +46,10 @@ static void Display( void )
glRotatef(Rot, 0, 0, 1);
glBegin(GL_POLYGON);
glTexCoord2f(0, 1); glVertex2f(-1, -1);
glTexCoord2f(1, 1); glVertex2f( 1, -1);
glTexCoord2f(1, 0); glVertex2f( 1, 1);
glTexCoord2f(0, 0); glVertex2f(-1, 1);
glTexCoord2f(0, 1); glVertex2f(-1, -0.5);
glTexCoord2f(1, 1); glVertex2f( 1, -0.5);
glTexCoord2f(1, 0); glVertex2f( 1, 0.5);
glTexCoord2f(0, 0); glVertex2f(-1, 0.5);
glEnd();
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 );
glMatrixMode( GL_MODELVIEW );
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 )
{
GLubyte texture[8][8] = { /* PT = Paletted Texture! */
{ 0, 0, 0, 0, 0, 0, 0, 0},
{ 0, 100, 100, 100, 0, 180, 180, 180},
{ 0, 100, 0, 100, 0, 0, 180, 0},
{ 0, 100, 0, 100, 0, 0, 180, 0},
{ 0, 100, 100, 100, 0, 0, 180, 0},
{ 0, 100, 0, 0, 0, 0, 180, 0},
{ 0, 100, 0, 0, 0, 0, 180, 0},
{ 0, 100, 255, 0, 0, 0, 180, 250},
};
#define HEIGHT 8
#define WIDTH 32
static char texture[HEIGHT][WIDTH] = {
" ",
" MMM EEEE SSS AAA ",
" M M M E S S A A ",
" M M M EEEE SS A A ",
" M M M E SS AAAAA ",
" M M E S S A A ",
" M M EEEE SSS A A ",
" "
};
GLubyte table[256][4];
int i;
@@ -118,17 +105,31 @@ static void Init( void )
exit(0);
}
/* put some wacky colors into the texture palette */
for (i=0;i<256;i++) {
table[i][0] = i;
table[i][1] = 0;
table[i][2] = 127 + i / 2;
table[i][3] = 255;
}
/* load the color table for each texel-index */
table[' '][0] = 50;
table[' '][1] = 50;
table[' '][2] = 50;
table[' '][3] = 50;
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
#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");
glColorTableEXT(GL_SHARED_TEXTURE_PALETTE_EXT, /* target */
GL_RGBA, /* internal format */
@@ -149,7 +150,7 @@ static void Init( void )
glTexImage2D(GL_TEXTURE_2D, /* target */
0, /* level */
GL_COLOR_INDEX8_EXT, /* internal format */
8, 8, /* width, height */
WIDTH, HEIGHT, /* width, height */
0, /* border */
GL_COLOR_INDEX, /* texture format */
GL_UNSIGNED_BYTE, /* texture type */
@@ -177,7 +178,6 @@ int main( int argc, char *argv[] )
glutReshapeFunc( Reshape );
glutKeyboardFunc( Key );
glutSpecialFunc( SpecialKey );
glutDisplayFunc( Display );
glutIdleFunc( Idle );