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misc/sttechno.cpp: Implemented tile X/Y flip flags. (#11954)

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Also corrected reversed names of loop variables tile_x and tile_y.
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987123879113 2024-01-21 00:28:48 +09:00 committed by GitHub
parent 5c0398cafd
commit 43e005905d
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1 changed files with 9 additions and 5 deletions
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src/mame/misc/sttechno.cpp
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@ -279,18 +279,22 @@ uint32_t sttechno_state::screen_update(screen_device &screen, bitmap_ind16 &bitm
break;
}
for (int tile_x = 0; tile_x < tiles_h; tile_x++) {
for (int tile_y = 0; tile_y < tiles_w; tile_y++) {
for (int tile_y = 0; tile_y < tiles_h; tile_y++) {
for (int tile_x = 0; tile_x < tiles_w; tile_x++) {
for (int pix_y = 0; pix_y < 16; pix_y++) {
for (int pix_x = 0; pix_x < 16; pix_x++) {
const int ty = (y + tile_x * 16 + pix_y) % 512; // 512x512 framebuffer size, must be wrapped
const int tx = (x + (tile_y * 16) + pix_x) % 512;
const int tx = xflip
? ((x + ((tiles_w - tile_x - 1) * 16) + (15 - pix_x)) % 512) // 512x512 framebuffer size, must be wrapped
: ((x + (tile_x * 16) + pix_x) % 512);
const int ty = yflip
? ((y + (tiles_h - tile_y - 1) * 16 + (15 - pix_y)) % 512)
: ((y + tile_y * 16 + pix_y) % 512);
if (!cliprect.contains(tx, ty))
continue;
uint16_t *const pix = &bitmap.pix(ty, tx);
const uint32_t char_offset = char_offset_base + (tile_x * (0x100 * tiles_w)) + (tile_y * 0x100) + (pix_y * 16) + pix_x;
const uint32_t char_offset = char_offset_base + (tile_y * (0x100 * tiles_w)) + (tile_x * 0x100) + (pix_y * 16) + pix_x;
const uint16_t char_data = m_video_flash->read_raw(char_offset / 2);
const int colidx = BIT(char_data, 8 * (1 - (char_offset & 1)), 8);
uint16_t color = m_sttga1_ram_pal[palidx * 0x100 + colidx];