void atari_ntsc_init( atari_ntsc_t* ntsc, atari_ntsc_setup_t const* setup,
atari_ntsc_in_t const* palette )
{
int entry;
init_t impl;
if ( !setup )
setup = &atari_ntsc_composite;
init( &impl, setup );
// Palette stores R/G/B data for 'atari_ntsc_palette_size' entries
for ( entry = 0; entry < atari_ntsc_palette_size; entry++ )
{
float r = impl.to_float [*palette++];
float g = impl.to_float [*palette++];
float b = impl.to_float [*palette++];
float y, i, q = RGB_TO_YIQ( r, g, b, y, i );
// Generate kernel
int ir, ig, ib = YIQ_TO_RGB( y, i, q, impl.to_rgb, int, ir, ig );
atari_ntsc_rgb_t rgb = PACK_RGB( ir, ig, ib );
if ( ntsc )
{
atari_ntsc_rgb_t* kernel = ntsc->table [entry];
gen_kernel( &impl, y, i, q, kernel );
correct_errors( rgb, kernel );
}
}
}
void atari_ntsc_init( atari_ntsc_t* ntsc, atari_ntsc_setup_t const* setup )
{
/* Atari change: no alternating burst phases - remove merge_fields variable. */
int entry;
init_t impl;
/* Atari change: NES palette generation and reading removed.
Atari palette generation is located in colours_ntsc.c, and colours are read
from setup->yiq_palette. */
if ( !setup )
setup = &atari_ntsc_composite;
init( &impl, setup );
/* Atari change: no alternating burst phases - remove code for merge_fields. */
for ( entry = 0; entry < atari_ntsc_palette_size; entry++ )
{
/* Atari change: Instead of palette generation, load colours
from setup->yiq_palette. */
double y;
double i;
double q;
{
double *yiq_ptr = setup->yiq_palette + 3 * entry;
y = *yiq_ptr++;
i = *yiq_ptr++;
q = *yiq_ptr++;
}
i *= rgb_unit;
q *= rgb_unit;
y *= rgb_unit;
y += rgb_offset;
/* Generate kernel */
{
int r, g, b = YIQ_TO_RGB( y, i, q, impl.to_rgb, int, r, g );
/* blue tends to overflow, so clamp it */
atari_ntsc_rgb_t rgb = PACK_RGB( r, g, (b < 0x3E0 ? b: 0x3E0) );
if ( setup->palette_out )
RGB_PALETTE_OUT( rgb, &setup->palette_out [entry * 3] );
if ( ntsc )
{
atari_ntsc_rgb_t* kernel = ntsc->table [entry];
gen_kernel( &impl, y, i, q, kernel );
/* Atari change: no alternating burst phases - remove code for merge_fields. */
correct_errors( rgb, kernel );
}
}
}
}
