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ATTR_LIN and ATTR_DIV

This commit is contained in:
Lior Halphon 2019-01-05 18:59:50 +02:00
parent 21eb96a2f5
commit ae959cd878
1 changed files with 58 additions and 1 deletions
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59
Core/sgb.c
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@ -9,9 +9,11 @@ enum {
PAL03 = 0x02,
PAL12 = 0x03,
ATTR_BLK = 0x04,
ATTR_LIN = 0x05,
ATTR_DIV = 0x06,
PAL_SET = 0x0A,
PAL_TRN = 0x0B,
DATA_SND = 0x0f,
DATA_SND = 0x0F,
MLT_REQ = 0x11,
CHR_TRN = 0x13,
PCT_TRN = 0x14,
@ -136,6 +138,11 @@ static void command_ready(GB_gameboy_t *gb)
middle_palette = outside_palette;
}
command->data[i].left &= 0x1F;
command->data[i].top &= 0x1F;
command->data[i].right &= 0x1F;
command->data[i].bottom &= 0x1F;
for (unsigned y = 0; y < 18; y++) {
for (unsigned x = 0; x < 20; x++) {
if (x < command->data[i].left || x > command->data[i].right ||
@ -158,6 +165,56 @@ static void command_ready(GB_gameboy_t *gb)
}
break;
}
case ATTR_LIN: {
struct {
uint8_t count;
uint8_t data[];
} *command = (void *)(gb->sgb->command + 1);
if (command->count > sizeof(gb->sgb->command) - 2) return;
for (unsigned i = 0; i < command->count; i++) {
bool horizontal = command->data[i] & 0x80;
uint8_t palette = (command->data[i] >> 5) & 0x3;
uint8_t line = (command->data[i]) & 0x1F;
if (horizontal) {
if (line > 18) continue;
for (unsigned x = 0; x < 20; x++) {
gb->sgb->attribute_map[x + 20 * line] = palette;
}
}
else {
if (line > 20) continue;
for (unsigned y = 0; y < 18; y++) {
gb->sgb->attribute_map[line + 20 * y] = palette;
}
}
}
break;
}
case ATTR_DIV: {
uint8_t high_palette = gb->sgb->command[1] & 3;
uint8_t low_palette = (gb->sgb->command[1] >> 2) & 3;
uint8_t middle_palette = (gb->sgb->command[1] >> 4) & 3;
bool horizontal = gb->sgb->command[1] & 0x40;
uint8_t line = gb->sgb->command[2] & 0x1F;
for (unsigned y = 0; y < 18; y++) {
for (unsigned x = 0; x < 20; x++) {
if ((horizontal? y : x) < line) {
gb->sgb->attribute_map[x + 20 * y] = low_palette;
}
else if ((horizontal? y : x) == line) {
gb->sgb->attribute_map[x + 20 * y] = middle_palette;
}
else {
gb->sgb->attribute_map[x + 20 * y] = high_palette;
}
}
}
break;
}
case PAL_SET:
memcpy(&gb->sgb->effective_palettes[0],
&gb->sgb->ram_palettes[4 * (gb->sgb->command[1] + (gb->sgb->command[2] & 1) * 0x100)],