glbpaltx.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:4k
- /* glbpaltex.c */
- /*
- * Global Paletted texture demo.
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <math.h>
- #include <GL/glut.h>
- #if defined(FX) && defined(__WIN32__)
- WINGDIAPI void APIENTRY gl3DfxSetPaletteEXT(GLuint *pal);
- #else
- void gl3DfxSetPaletteEXT(GLuint *pal);
- #endif
- static float Rot = 0.0;
- static void Idle( void )
- {
- Rot += 5.0;
- glutPostRedisplay();
- }
- static void Display( void )
- {
- glClear( GL_COLOR_BUFFER_BIT );
- glPushMatrix();
- 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);
- glEnd();
- glPopMatrix();
- glutSwapBuffers();
- }
- static void Reshape( int width, int height )
- {
- glViewport( 0, 0, width, height );
- glMatrixMode( GL_PROJECTION );
- glLoadIdentity();
- glFrustum( -1.0, 1.0, -1.0, 1.0, 5.0, 25.0 );
- glMatrixMode( GL_MODELVIEW );
- glLoadIdentity();
- glTranslatef( 0.0, 0.0, -15.0 );
- }
- /* ARGSUSED1 */
- static void Key( unsigned char key, int x, int y )
- {
- switch (key) {
- case 27:
- exit(0);
- break;
- }
- glutPostRedisplay();
- }
- /* ARGSUSED1 */
- static void SpecialKey( int key, int x, int 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 )
- {
- #ifdef GL_3DFX_set_global_palette
- 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},
- };
- int i;
- GLubyte table[256][4];
- if (!glutExtensionSupported("3DFX_set_global_palette")) {
- #endif
- printf("Sorry, 3DFX_set_global_palette not supportedn");
- exit(0);
- #ifdef GL_3DFX_set_global_palette
- }
- /* put some wacky colors into the texture palette */
- for (i=0;i<256;i++) {
- table[i][2] = i;
- table[i][1] = 0;
- table[i][0] = 127 + i / 2;
- table[i][3] = 255;
- }
- gl3DfxSetPaletteEXT((GLuint *)table);
- glTexImage2D(GL_TEXTURE_2D, /* target */
- 0, /* level */
- GL_COLOR_INDEX8_EXT, /* internal format */
- 8, 8, /* 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);
- }
- int main( int argc, char *argv[] )
- {
- glutInit( &argc, argv );
- glutInitWindowPosition( 0, 0 );
- glutInitWindowSize( 640, 480 );
- glutInitDisplayMode( GLUT_RGB | GLUT_DOUBLE );
- glutCreateWindow(argv[0]);
- Init();
- glutReshapeFunc( Reshape );
- glutKeyboardFunc( Key );
- glutSpecialFunc( SpecialKey );
- glutDisplayFunc( Display );
- glutIdleFunc( Idle );
- glutMainLoop();
- return 0;
- }