static void
event_help( void )
{
grEvent dummy_event;
FTDemo_Display_Clear( display );
grSetLineHeight( 10 );
grGotoxy( 0, 0 );
grSetMargin( 2, 1 );
grGotobitmap( display->bitmap );
grWriteln( "FreeType String Viewer - part of the FreeType test suite" );
grLn();
grWriteln( "This program is used to display a string of text using" );
grWriteln( "the new convenience API of the FreeType 2 library." );
grLn();
grWriteln( "Use the following keys :" );
grLn();
grWriteln( " F1 or ? : display this help screen" );
grLn();
grWriteln( " a : toggle anti-aliasing" );
grWriteln( " b : toggle embedded bitmaps (and disable rotation)" );
grWriteln( " f : toggle forced auto-hinting" );
grWriteln( " h : toggle outline hinting" );
grLn();
grWriteln( " 1-2 : select rendering mode" );
grWriteln( " k : cycle through kerning modes" );
grWriteln( " t : cycle through kerning degrees" );
grWriteln( " V : toggle vertical rendering" );
grLn();
grWriteln( " G : toggle gamma correction" );
grWriteln( " g : increase gamma by 0.1" );
grWriteln( " v : decrease gamma by 0.1" );
grLn();
grWriteln( " n : next font" );
grWriteln( " p : previous font" );
grLn();
grWriteln( " Up : increase pointsize by 1 unit" );
grWriteln( " Down : decrease pointsize by 1 unit" );
grWriteln( " Page Up : increase pointsize by 10 units" );
grWriteln( " Page Down : decrease pointsize by 10 units" );
grLn();
grWriteln( " Right : rotate counter-clockwise" );
grWriteln( " Left : rotate clockwise" );
grWriteln( " F7 : big rotate counter-clockwise" );
grWriteln( " F8 : big rotate clockwise" );
grLn();
grWriteln( "press any key to exit this help screen" );
grRefreshSurface( display->surface );
grListenSurface( display->surface, gr_event_key, &dummy_event );
}
int
main( int argc,
char** argv )
{
grEvent event;
/* Initialize engine */
handle = FTDemo_New();
parse_cmdline( &argc, &argv );
handle->encoding = status.encoding;
handle->use_sbits = 0;
FTDemo_Update_Current_Flags( handle );
for ( ; argc > 0; argc--, argv++ )
{
error = FTDemo_Install_Font( handle, argv[0], 0 );
if ( error )
{
fprintf( stderr, "failed to install %s", argv[0] );
if ( error == FT_Err_Invalid_CharMap_Handle )
fprintf( stderr, ": missing valid charmap\n" );
else
fprintf( stderr, "\n" );
}
}
if ( handle->num_fonts == 0 )
PanicZ( "could not open any font file" );
display = FTDemo_Display_New( gr_pixel_mode_gray,
status.width, status.height );
display->back_color.value = 0;
display->fore_color.value = 0xff;
if ( !display )
PanicZ( "could not allocate display surface" );
grSetTitle( display->surface,
"FreeType String Viewer - press ? for help" );
event_gamma_change( 0 );
event_font_change( 0 );
status.header = 0;
for ( ;; )
{
FTDemo_Display_Clear( display );
switch ( status.render_mode )
{
case RENDER_MODE_STRING:
status.sc.center = 1L << 15;
error = FTDemo_String_Draw( handle, display,
&status.sc,
display->bitmap->width / 2,
display->bitmap->rows / 2 );
break;
case RENDER_MODE_KERNCMP:
{
FTDemo_String_Context sc = status.sc;
FT_Int x, y;
FT_Int height;
x = 55;
height = ( status.ptsize * status.res / 72 + 32 ) >> 6;
if ( height < CELLSTRING_HEIGHT )
height = CELLSTRING_HEIGHT;
/* First line: none */
sc.center = 0;
sc.kerning_mode = 0;
sc.kerning_degree = 0;
sc.vertical = 0;
sc.matrix = NULL;
y = CELLSTRING_HEIGHT * 2 + display->bitmap->rows / 4 + height;
grWriteCellString( display->bitmap, 5,
y - ( height + CELLSTRING_HEIGHT ) / 2,
"none", display->fore_color );
error = FTDemo_String_Draw( handle, display, &sc, x, y );
/* Second line: track kern only */
sc.kerning_degree = status.sc.kerning_degree;
y += height;
grWriteCellString( display->bitmap, 5,
y - ( height + CELLSTRING_HEIGHT ) / 2,
"track", display->fore_color );
error = FTDemo_String_Draw( handle, display, &sc, x, y );
/* Third line: track kern + pair kern */
sc.kerning_mode = status.sc.kerning_mode;
y += height;
grWriteCellString( display->bitmap, 5,
y - ( height + CELLSTRING_HEIGHT ) / 2,
"both", display->fore_color );
error = FTDemo_String_Draw( handle, display, &sc, x, y );
}
break;
}
if ( !error && status.sc.gamma_ramp )
gamma_ramp_draw( status.gamma_ramp, display->bitmap );
write_header( error );
status.header = 0;
grListenSurface( display->surface, 0, &event );
if ( Process_Event( &event ) )
break;
}
printf( "Execution completed successfully.\n" );
FTDemo_Display_Done( display );
FTDemo_Done( handle );
exit( 0 ); /* for safety reasons */
/* return 0; */ /* never reached */
}
