static void update_viewport(void)
{
vwidth = bitmap.viewport.w + (bitmap.viewport.x * 2);
vheight = bitmap.viewport.h + (bitmap.viewport.y * 2);
if (config.ntsc)
{
if (reg[12] & 1)
vwidth = MD_NTSC_OUT_WIDTH(vwidth);
else
vwidth = SMS_NTSC_OUT_WIDTH(vwidth);
}
if (config.render && interlaced)
{
vheight = vheight * 2;
}
}
int main( int argc, char** argv )
{
image_t image;
int sony_decoder = 0;
int scrolling = 0;
int x = 0;
sms_ntsc_setup_t setup = sms_ntsc_composite;
sms_ntsc_t* ntsc = (sms_ntsc_t*) malloc( sizeof (sms_ntsc_t) );
if ( !ntsc )
fatal_error( "Out of memory" );
sms_ntsc_init( ntsc, &setup );
load_bmp( &image, (argc > 1 ? argv [1] : "test.bmp"), 0 );
image.height--; /* scrolling would read past end without this */
init_window( SMS_NTSC_OUT_WIDTH( image.width ), image.height * 2 );
while ( read_input() )
{
x = (x + scrolling) % image.width;
lock_pixels();
sms_ntsc_blit( ntsc, image.rgb_16 + x, image.row_width,
image.width, image.height, output_pixels, output_pitch );
double_output_height();
display_output();
switch ( key_pressed )
{
case ' ': scrolling = !scrolling; break;
case 'c': setup = sms_ntsc_composite; break;
case 's': setup = sms_ntsc_svideo; break;
case 'r': setup = sms_ntsc_rgb; break;
case 'm': setup = sms_ntsc_monochrome; break;
case 'd': sony_decoder = !sony_decoder; break;
}
if ( key_pressed || mouse_moved )
{
/* available parameters: hue, saturation, contrast, brightness,
sharpness, gamma, bleed, resolution, artifacts, fringing */
setup.sharpness = mouse_x;
setup.gamma = mouse_y;
setup.decoder_matrix = 0;
if ( sony_decoder )
{
/* Sony CXA2025AS US */
static float matrix [6] = { 1.630, 0.317, -0.378, -0.466, -1.089, 1.677 };
setup.decoder_matrix = matrix;
}
sms_ntsc_init( ntsc, &setup );
}
}
save_bmp( argc > 2 ? argv [2] : "filtered.bmp" );
free( ntsc );
return 0;
}
