Max
/
SameBoy
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

More colorization commands

This commit is contained in:
Lior Halphon 2018-11-17 00:44:18 +02:00
parent b698ce5d95
commit deb5e21842
2 changed files with 81 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

98
Core/sgb.c
View File

@ -12,6 +12,8 @@ enum {
MLT_REQ = 0x11,
CHR_TRN = 0x13,
PCT_TRN = 0x14,
ATTR_TRN = 0x15,
ATTR_SET = 0x16,
MASK_EN = 0x17,
};
@ -22,6 +24,14 @@ typedef enum {
MASK_COLOR_0,
} mask_mode_t;
typedef enum {
TRANSFER_LOW_TILES,
TRANSFER_HIGH_TILES,
TRANSFER_BORDER_DATA,
TRANSFER_PALETTES,
TRANSFER_ATTRIBUTES,
} transfer_dest_t;
#define SGB_PACKET_SIZE 16
static inline void pal_command(GB_gameboy_t *gb, unsigned first, unsigned second)
{
@ -38,6 +48,19 @@ static inline void pal_command(GB_gameboy_t *gb, unsigned first, unsigned second
}
}
static inline void load_attribute_file(GB_gameboy_t *gb, unsigned file_index)
{
if (file_index > 0x2C) return;
uint8_t *output = gb->sgb->attribute_map;
for (unsigned i = 0; i < 90; i++) {
uint8_t byte = gb->sgb->attribute_files[file_index * 90 + i];
for (unsigned j = 4; j--;) {
*(output++) = byte >> 6;
byte <<= 2;
}
}
}
static void command_ready(GB_gameboy_t *gb)
{
/* SGB header commands are used to send the contents of the header to the SNES CPU.
@ -149,15 +172,17 @@ static void command_ready(GB_gameboy_t *gb)
&gb->sgb->ram_palettes[4 * (gb->sgb->command[7] + (gb->sgb->command[8] & 1) * 0x100)],
8);
if (gb->sgb->command[9] & 0x80) {
load_attribute_file(gb, gb->sgb->command[9] & 0x3F);
}
if (gb->sgb->command[9] & 0x40) {
gb->sgb->mask_mode = MASK_DISABLED;
}
break;
case PAL_TRN:
gb->sgb->vram_transfer_countdown = 2;
gb->sgb->tile_transfer = false;
gb->sgb->data_transfer = true;
gb->sgb->palette_transfer = true;
gb->sgb->transfer_dest = TRANSFER_PALETTES;
break;
case DATA_SND:
// Not supported, but used by almost all SGB games for hot patching, so let's mute the warning for this
@ -166,28 +191,40 @@ static void command_ready(GB_gameboy_t *gb)
gb->sgb->player_count = (uint8_t[]){1, 2, 1, 4}[gb->sgb->command[1] & 3];
gb->sgb->current_player = gb->sgb->player_count - 1;
break;
case MASK_EN:
gb->sgb->mask_mode = gb->sgb->command[1] & 3;
break;
case CHR_TRN:
gb->sgb->vram_transfer_countdown = 2;
gb->sgb->tile_transfer = true;
gb->sgb->data_transfer = false;
gb->sgb->tile_transfer_high = gb->sgb->command[1] & 1;
gb->sgb->transfer_dest = (gb->sgb->command[1] & 1)? TRANSFER_HIGH_TILES : TRANSFER_LOW_TILES;
break;
case PCT_TRN:
gb->sgb->vram_transfer_countdown = 2;
gb->sgb->tile_transfer = false;
gb->sgb->data_transfer = true;
gb->sgb->palette_transfer = false;
gb->sgb->transfer_dest = TRANSFER_BORDER_DATA;
break;
case ATTR_TRN:
gb->sgb->vram_transfer_countdown = 2;
gb->sgb->transfer_dest = TRANSFER_ATTRIBUTES;
break;
case ATTR_SET:
load_attribute_file(gb, gb->sgb->command[0] & 0x3F);
if (gb->sgb->command[0] & 0x40) {
gb->sgb->mask_mode = MASK_DISABLED;
}
break;
case MASK_EN:
gb->sgb->mask_mode = gb->sgb->command[1] & 3;
break;
default:
if ((gb->sgb->command[0] >> 3) == 8 &&
(gb->sgb->command[1] & ~0x80) == 0 &&
(gb->sgb->command[2] & ~0x80) == 0) {
/* Mute/dummy sound commands, ignore this command as it's used by many games at startup */
break;
}
GB_log(gb, "Unimplemented SGB command %x: ", gb->sgb->command[0] >> 3);
for (unsigned i = 0; i < gb->sgb->command_write_index / 8; i++) {
GB_log(gb, "%02x ", gb->sgb->command[i]);
}
GB_log(gb, "\n");
;
}
}
@ -323,8 +360,8 @@ void GB_sgb_render(GB_gameboy_t *gb)
if (gb->sgb->vram_transfer_countdown) {
if (--gb->sgb->vram_transfer_countdown == 0) {
if (gb->sgb->tile_transfer) {
uint8_t *base = &gb->sgb->pending_border.tiles[gb->sgb->tile_transfer_high? 0x80 * 8 * 8 : 0];
if (gb->sgb->transfer_dest == TRANSFER_LOW_TILES || gb->sgb->transfer_dest == TRANSFER_HIGH_TILES) {
uint8_t *base = &gb->sgb->pending_border.tiles[gb->sgb->transfer_dest == TRANSFER_HIGH_TILES ? 0x80 * 8 * 8 : 0];
for (unsigned tile = 0; tile < 0x80; tile++) {
unsigned tile_x = (tile % 10) * 16;
unsigned tile_y = (tile / 10) * 8;
@ -337,9 +374,27 @@ void GB_sgb_render(GB_gameboy_t *gb)
}
}
else if (gb->sgb->data_transfer) {
unsigned size = gb->sgb->palette_transfer? 0x100 : 0x88;
uint16_t *data = gb->sgb->palette_transfer? gb->sgb->ram_palettes : gb->sgb->pending_border.raw_data;
else {
unsigned size = 0;
uint16_t *data = NULL;
switch (gb->sgb->transfer_dest) {
case TRANSFER_PALETTES:
size = 0x100;
data = gb->sgb->ram_palettes;
break;
case TRANSFER_BORDER_DATA:
size = 0x88;
data = gb->sgb->pending_border.raw_data;
break;
case TRANSFER_ATTRIBUTES:
size = 0xFE;
data = (uint16_t *)gb->sgb->attribute_files;
break;
default:
return; // Corrupt state?
}
for (unsigned tile = 0; tile < size; tile++) {
unsigned tile_x = (tile % 20) * 8;
unsigned tile_y = (tile / 20) * 8;
@ -349,10 +404,15 @@ void GB_sgb_render(GB_gameboy_t *gb)
for (unsigned x = 0; x < 8; x++) {
*data |= pixel_to_bits[gb->sgb->screen_buffer[(tile_x + x) + (tile_y + y) * 160] & 3] >> x;
}
#ifdef GB_BIG_ENDIAN
if (gb->sgb->transfer_dest == TRANSFER_ATTRIBUTES) {
*data = __builtin_bswap16(*data);
}
#endif
data++;
}
}
if (!gb->sgb->palette_transfer) {
if (gb->sgb->transfer_dest == TRANSFER_BORDER_DATA) {
gb->sgb->border_animation = 64;
}
}

4
Core/sgb.h
View File

@ -25,8 +25,7 @@ struct GB_sgb_s {
uint8_t mask_mode;
/* Data Transfer */
uint8_t vram_transfer_countdown;
bool tile_transfer, tile_transfer_high, data_transfer, palette_transfer;
uint8_t vram_transfer_countdown, transfer_dest;
/* Border */
struct {
@ -45,6 +44,7 @@ struct GB_sgb_s {
uint16_t effective_palettes[4 * 4];
uint16_t ram_palettes[4 * 512];
uint8_t attribute_map[20 * 18];
uint8_t attribute_files[0xFE0];
};
void GB_sgb_write(GB_gameboy_t *gb, uint8_t value);