+++ /dev/null
-
-/*
- * Paletted texture demo. Written by Brian Paul.
- * This program is in the public domain.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-#include <string.h>
-#ifdef _WIN32
-#include <windows.h>
-#endif
-#include <GL/glew.h>
-#include <GL/glut.h>
-
-
-static float Rot = 0.0;
-static GLboolean Anim = 1;
-
-
-static void Idle( void )
-{
- float t = glutGet(GLUT_ELAPSED_TIME) * 0.001; /* in seconds */
- Rot = t * 360 / 4; /* 1 rotation per 4 seconds */
- glutPostRedisplay();
-}
-
-
-static void Display( void )
-{
- /* draw background gradient */
- glDisable(GL_TEXTURE_2D);
- glBegin(GL_POLYGON);
- glColor3f(1.0, 0.0, 0.2); glVertex2f(-1.5, -1.0);
- glColor3f(1.0, 0.0, 0.2); glVertex2f( 1.5, -1.0);
- glColor3f(0.0, 0.0, 1.0); glVertex2f( 1.5, 1.0);
- glColor3f(0.0, 0.0, 1.0); glVertex2f(-1.5, 1.0);
- glEnd();
-
- glPushMatrix();
- glRotatef(Rot, 0, 0, 1);
-
- glEnable(GL_TEXTURE_2D);
- glBegin(GL_POLYGON);
- 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();
-
- glutSwapBuffers();
-}
-
-
-static void Reshape( int width, int height )
-{
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glOrtho( -1.5, 1.5, -1.0, 1.0, -1.0, 1.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
-}
-
-
-static void Key( unsigned char key, int x, int y )
-{
- (void) x;
- (void) y;
- switch (key) {
- case 27:
- exit(0);
- break;
- case 's':
- Rot += 0.5;
- break;
- case ' ':
- Anim = !Anim;
- if (Anim)
- glutIdleFunc( Idle );
- else
- glutIdleFunc( NULL );
- break;
- }
- glutPostRedisplay();
-}
-
-
-static void Init( void )
-{
-#define HEIGHT 8
-#define WIDTH 32
- /* 257 = HEIGHT * WIDTH + 1 (for trailing '\0') */
- static char texture[257] = {"\
- \
- 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];
-
- if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
- printf("Sorry, GL_EXT_paletted_texture not supported\n");
- exit(0);
- }
-
- /* load the color table for each texel-index */
- memset(table, 0, 256*4);
- table[' '][0] = 255;
- table[' '][1] = 255;
- table[' '][2] = 255;
- table[' '][3] = 64;
- table['M'][0] = 255;
- table['M'][1] = 0;
- table['M'][2] = 0;
- table['M'][3] = 255;
- table['E'][0] = 0;
- table['E'][1] = 255;
- table['E'][2] = 0;
- table['E'][3] = 255;
- table['S'][0] = 0;
- table['S'][1] = 0;
- table['S'][2] = 255;
- table['S'][3] = 255;
- table['A'][0] = 255;
- table['A'][1] = 255;
- table['A'][2] = 0;
- table['A'][3] = 255;
-
-#ifdef GL_EXT_paletted_texture
-
-#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 */
- 256, /* table size */
- GL_RGBA, /* table format */
- GL_UNSIGNED_BYTE, /* table type */
- table); /* the color table */
- glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
-#else
- glColorTableEXT(GL_TEXTURE_2D, /* target */
- GL_RGBA, /* internal format */
- 256, /* table size */
- GL_RGBA, /* table format */
- GL_UNSIGNED_BYTE, /* table type */
- table); /* the color table */
-#endif
-
- glTexImage2D(GL_TEXTURE_2D, /* target */
- 0, /* level */
- GL_COLOR_INDEX8_EXT, /* internal format */
- WIDTH, HEIGHT, /* width, height */
- 0, /* border */
- GL_COLOR_INDEX, /* texture format */
- GL_UNSIGNED_BYTE, /* texture type */
- texture); /* the texture */
-#endif
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- glEnable(GL_TEXTURE_2D);
-
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-#undef HEIGHT
-#undef WIDTH
-}
-
-
-
-/*
- * Color ramp test
- */
-static void Init2( void )
-{
-#define HEIGHT 32
-#define WIDTH 256
- static char texture[HEIGHT][WIDTH];
- GLubyte table[256][4];
- int i, j;
-
- if (!glutExtensionSupported("GL_EXT_paletted_texture")) {
- printf("Sorry, GL_EXT_paletted_texture not supported\n");
- exit(0);
- }
-
- for (j = 0; j < HEIGHT; j++) {
- for (i = 0; i < WIDTH; i++) {
- texture[j][i] = i;
- }
- }
-
- for (i = 0; i < 255; i++) {
- table[i][0] = i;
- table[i][1] = 0;
- table[i][2] = 0;
- table[i][3] = 255;
- }
-
-#ifdef GL_EXT_paletted_texture
-
-#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 */
- 256, /* table size */
- GL_RGBA, /* table format */
- GL_UNSIGNED_BYTE, /* table type */
- table); /* the color table */
- glEnable(GL_SHARED_TEXTURE_PALETTE_EXT);
-#else
- glColorTableEXT(GL_TEXTURE_2D, /* target */
- GL_RGBA, /* internal format */
- 256, /* table size */
- GL_RGBA, /* table format */
- GL_UNSIGNED_BYTE, /* table type */
- table); /* the color table */
-#endif
-
- glTexImage2D(GL_TEXTURE_2D, /* target */
- 0, /* level */
- GL_COLOR_INDEX8_EXT, /* internal format */
- WIDTH, HEIGHT, /* width, height */
- 0, /* border */
- GL_COLOR_INDEX, /* texture format */
- GL_UNSIGNED_BYTE, /* texture type */
- texture); /* teh texture */
-#endif
-
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
- glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- glEnable(GL_TEXTURE_2D);
-
- glEnable(GL_BLEND);
- glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
-}
-
-
-int main( int argc, char *argv[] )
-{
- glutInitWindowSize( 400, 300 );
- glutInit( &argc, argv );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
- glutCreateWindow(argv[0]);
- glewInit();
-
- Init();
- (void) Init2; /* silence warning */
-
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutDisplayFunc( Display );
- if (Anim)
- glutIdleFunc( Idle );
-
- glutMainLoop();
- return 0;
-}
projects / mesa.git / blobdiff