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Try again with colour.

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This commit is contained in:
Thomas Harte 2023-02-19 22:14:18 -05:00
parent 6990ba9242
commit 318109b7d5
1 changed files with 8 additions and 11 deletions
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19
Components/9918/Implementation/Fetch.hpp
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@ -243,34 +243,31 @@ class SpriteFetcher {
uint8_t name(int slot) {
return base->ram_[
base->sprite_attribute_table_address_ & bits<7>(AddressT((tile_buffer.active_sprites[slot].index << 2) | 2))
] & (base->sprites_16x16_ ? ~3 : ~0);
base->sprite_attribute_table_address_ & bits<7>(AddressT((tile_buffer.active_sprites[slot].index << 2) | 2))
] & (base->sprites_16x16_ ? ~3 : ~0);
}
void fetch_image(int slot, uint8_t name) {
const AddressT graphic_offset = bits<11>(AddressT((name << 3) | tile_buffer.active_sprites[slot].row));
uint8_t colour = 0;
switch(mode) {
case SpriteMode::Mode1:
// Fetch colour from the attribute table, per this sprite's slot.
colour =
base->ram_[
base->sprite_attribute_table_address_ & bits<7>(AddressT((tile_buffer.active_sprites[slot].index << 2) | 3))
];
colour = base->ram_[
base->sprite_attribute_table_address_ & bits<7>(AddressT((tile_buffer.active_sprites[slot].index << 2) | 3))
];
break;
case SpriteMode::Mode2: {
// Fetch colour from the colour table, per this sprite's name and row.
// Fetch colour from the colour table, per this sprite's slot and row.
colour = base->ram_[
base->sprite_attribute_table_address_ & AddressT(~512) & graphic_offset
base->sprite_attribute_table_address_ & AddressT(~512) & AddressT((slot << 4) | tile_buffer.active_sprites[slot].row)
];
} break;
}
tile_buffer.active_sprites[slot].image[2] = colour;
tile_buffer.active_sprites[slot].x -= (colour & 0x80) >> 2;
const AddressT graphic_location = base->sprite_generator_table_address_ & graphic_offset;
const AddressT graphic_location = base->sprite_generator_table_address_ & bits<11>(AddressT((name << 3) | tile_buffer.active_sprites[slot].row));
tile_buffer.active_sprites[slot].image[0] = base->ram_[graphic_location];
tile_buffer.active_sprites[slot].image[1] = base->ram_[graphic_location+16];
}