/*
* one.c
*
- * Hey! This was the original file where freeglut development started. Just
+ * Hey! This was the original file where freeglut development started. Just
* note what I have written here at the time. And see the creation date :)
*
* : This is a wrapper. I still have to figure out
{
int lines;
char *p;
-
+
/*
* Prepare the OpenGL state
*/
glDisable( GL_LIGHTING );
- glDisable( GL_DEPTH_TEST );
+ glDisable( GL_DEPTH_TEST );
glMatrixMode( GL_PROJECTION );
glPushMatrix();
glLoadIdentity();
-
+
/*
* Have an orthogonal projection matrix set
*/
glMatrixMode( GL_MODELVIEW );
glPushMatrix();
glLoadIdentity();
-
+
/*
- * Now the main text
+ * Now the main text
*/
- glColor3ub( 0, 0, 0 );
- glRasterPos2i( nX, nY );
+ glColor3ub( 0, 0, 0 );
+ glRasterPos2i( nX, nY );
for( p=pszText, lines=0; *p; p++ )
{
lines++;
glRasterPos2i( nX, nY-(lines*18) );
}
-
+
glutBitmapCharacter( GLUT_BITMAP_HELVETICA_18, *p );
}
-
+
/*
* Revert to the old matrix modes
- */
+ */
glMatrixMode( GL_PROJECTION );
glPopMatrix();
-
+
glMatrixMode( GL_MODELVIEW );
glPopMatrix();
-
+
/*
* Restore the old OpenGL states
*/
glColor4f( 1.0f, 1.0f, 1.0f, 1.0f );
glEnable( GL_DEPTH_TEST );
glEnable( GL_LIGHTING );
-}
+}
/*
* This is the display routine for our sample FreeGLUT windows
/*
* Draw a silly text
*/
- if( g_InGameMode == 0 )
+ if( g_InGameMode == 0 )
PrintText( 20, 20, "Hello there cruel world!" );
else
- PrintText( 20, 20, "Press ESC to leave the game mode!" );
+ PrintText( 20, 20, "Press ESC to leave the game mode!" );
/*
* And swap this context's buffers
g_LeaveGameMode = 0;
g_InGameMode = 0;
}
-}
+}
/*
* The reshape function
/*
* Just print something funny
*/
- printf( "SampleMenu() callback executed, menuID is %i\n", menuID );
+ printf( "SampleMenu() callback executed, menuID is %i\n", menuID );
}
/*
glutAddMenuEntry( "Sub menu A1 (01)", 1 );
glutAddMenuEntry( "Sub menu A2 (02)", 2 );
glutAddMenuEntry( "Sub menu A3 (03)", 3 );
-
+
subMenuB = glutCreateMenu( SampleMenu );
glutAddMenuEntry( "Sub menu B1 (04)", 4 );
glutAddMenuEntry( "Sub menu B2 (05)", 5 );
glutGameModeString( "640x480:16@72" );
glutGameModeString( "1024x768" );
glutGameModeString( ":32@120" );
- glutGameModeString( "Toudi glupcze, Danwin bedzie moj!" );
+ glutGameModeString( "Toudi glupcze, Danwin bedzie moj!" );
glutGameModeString( "640x480:16@72" );
glutEnterGameMode();
printf( "current window is %ix%i+%i+%i",
glutGet( GLUT_WINDOW_X ), glutGet( GLUT_WINDOW_Y ),
glutGet( GLUT_WINDOW_WIDTH ), glutGet( GLUT_WINDOW_HEIGHT )
- );
+ );
/*
* Enter the main FreeGLUT processing loop
+++ /dev/null
-/*
- * freeglut offscreen rendering demo.
- *
- * Usage:
- *
- * offscreen [standard GLUT options] [filename]
- *
- * The filename is used to say where to write a PNM image file
- * that is the sole way to verify that this program is doing what
- * it should (i.e., rendering offscreen).
- *
- * You can view the PNM file in image viewers and editors such as
- * the GIMP. (Everyone doing any kind of graphics has at least one
- * multi-format-reading image manipulation program, right?)
- *
- * If no filename is specified, the chosen filename is "offscreen.pnm".
- *
- * Some suggested uses for GLUT_OFFSCREEN:
- *
- * * Implementation of a graphics language that writes bitmapped image files.
- * * Capture GLUT bitmapped fonts to a texture at runtime to make scalable
- * bitmapped fonts.
- * * Using OpenGL to create special-effect textures at run-time.
- * * Making stencils.
- * * Getting the depth-buffer for a height-field.
- * * Using OpenGL to create a poster texture (e.g., for pasting onto a a
- * video screen in a virtual world).
- * * Using OpenGL to prescale an image to a power-of-2 dimension (including
- * OpenGL antialiasing). There's no reason that you couldn't do this
- * yourself, but OpenGL can do it for you, so why not?
- * * Rendering to a bitmap larger than the display has been suggested
- * as well. This is a cheap way to produce arbitrarily high resolution
- * images for printing.
- *
- * In every case, there are at least cases where you would want to do this
- * without actually rendering to a visible window.
- *
- */
-#include <stdio.h>
-#include <GL/freeglut.h>
-
-#define OFFSCREEN_W 500
-#define OFFSCREEN_H 250
-
-
-int offscreen_id;
-int onscreen_id;
-const char *save_file_name = "offscreen.pnm";
-
-
-void cb_onscreen_display( void )
-{
- glClear( GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT );
- glColor3d( 1.0, 0.0, 0.0 );
- glBegin( GL_LINE_LOOP );
- glVertex2d( 0.0, 0.0 );
- glVertex2d( 0.5, 0.0 );
- glVertex2d( 0.5, 0.5 );
- glVertex2d( 0.0, 0.5 );
- glVertex2d( 0.0, 0.0 );
- glEnd( );
- glColor3d( 1.0, 1.0, 1.0 );
- glRasterPos2d( -1.0, 0.8 );
- glutBitmapString(
- GLUT_BITMAP_TIMES_ROMAN_24, "Press `s' or `S' to Send to"
- );
- glRasterPos2d( -.8, 0.6 );
- glutBitmapString(
- GLUT_BITMAP_TIMES_ROMAN_24, "'offscreen.pnm'"
- );
- glRasterPos2d( -1.0, 0.3 );
- glutBitmapString(
- GLUT_BITMAP_TIMES_ROMAN_24, "Press `q', `Q', or Esc to quit."
- );
-
- glutSwapBuffers( );
-}
-
-void write_raw_pnm( char *fname, char *pixels, int w, int h)
-{
- FILE *f;
-
- printf( "Trying to create: %s\n", fname );
- f = fopen( fname, "wb" );
- if( !f )
- printf( "Ouch! Cannot create file.\n" );
- else
- {
- int row;
-
- printf( "Opened file.\n" );
- fprintf( f, "P6\n" );
- fprintf( f, "# CREATOR: offscreen freeglut demo\n" );
- fprintf( f, "%d %d\n", w, h );
- fprintf( f, "255\n" );
-
- /*
- * Write the rows in reverse order because OpenGL's 0th row
- * is at the bottom.
- */
- for( row = h; row; --row )
- fwrite( pixels + ((row - 1)*w*3), 1, 3 * w, f );
-
- fclose( f );
- }
-}
-
-
-void cb_offscreen_display( void )
-{
- static char pixels [OFFSCREEN_W * OFFSCREEN_H * 3];
- int i;
-
- cb_onscreen_display( );
- glColor3d( 0.0, 1.0, 0.0 );
- glBegin( GL_LINES );
- for( i = 0; i < 100; ++i)
- {
- glVertex2d( +1 - (i/50.0), +1 );
- glVertex2d( -1 + (i/50.0), -1 );
- }
- glEnd( );
- glFinish( );
-
- glPixelStorei( GL_PACK_ALIGNMENT, 1 );
- glReadPixels(
- 0, 0, OFFSCREEN_W, OFFSCREEN_H,
- GL_RGB, GL_UNSIGNED_BYTE, (GLvoid *)pixels
- );
- write_raw_pnm( save_file_name, pixels, OFFSCREEN_W, OFFSCREEN_H );
-}
-
-
-void cb_onscreen_keyboard( unsigned char key, int x, int y )
-{
- switch( key )
- {
- case 's':
- case 'S':
- glutSetWindow( offscreen_id );
- glutPostRedisplay( );
- break;
-
- case '\x1b':
- case 'q':
- case 'Q':
- exit( 0 );
- break;
-
- default:
- break;
- }
-}
-
-int main( int argc, char **argv )
-{
- glutInit( &argc, argv );
- if( argv[ 1 ] )
- save_file_name = argv[ 1 ];
-
- glutInitDisplayMode( GLUT_RGB | GLUT_DEPTH | GLUT_DOUBLE );
- onscreen_id = glutCreateWindow( "Offscreen demo" );
- glutDisplayFunc( cb_onscreen_display );
- glutKeyboardFunc( cb_onscreen_keyboard );
-
- glutInitDisplayMode( GLUT_RGB | GLUT_SINGLE | GLUT_OFFSCREEN );
- glutInitWindowSize( OFFSCREEN_W, OFFSCREEN_H );
- offscreen_id = glutCreateWindow( "" );
- glutDisplayFunc( cb_offscreen_display );
-
- glutMainLoop( );
-}
projects / freeglut / commitdiff