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sprites wraparound (eg. dkong3 when clearing stage 1: http://www.youtube.com/watch?v=DM2qbL5xTVE )

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This commit is contained in:
Michaël Banaan Ananas 2012-01-30 23:55:21 +00:00
parent 609c59d2e2
commit 4ac66f284a
1 changed files with 16 additions and 21 deletions
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37
src/mame/video/dkong.c
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@ -564,7 +564,7 @@ static void draw_sprites(running_machine &machine, bitmap_ind16 &bitmap, const r
dkong_state *state = machine.driver_data<dkong_state>();
int offs;
int scanline_vf; /* buffering scanline including flip */
int scanline_vfc; /* line buffering scanline including flip - this is the cached scanline_vf*/
int scanline_vfc; /* line buffering scanline including flip - this is the cached scanline_vf */
int scanline; /* current scanline */
int add_y;
int add_x;
@ -637,34 +637,29 @@ static void draw_sprites(running_machine &machine, bitmap_ind16 &bitmap, const r
/* has similar hardware, uses a memory mapped port to change */
/* palette bank, so it's limited to 16 color codes) */
int x = state->m_sprite_ram[offs + 3];
int code = (state->m_sprite_ram[offs + 1] & 0x7f) + ((state->m_sprite_ram[offs + 2] & mask_bank) << shift_bits);
int color = (state->m_sprite_ram[offs + 2] & 0x0f) + 16 * state->m_palette_bank;
int flipx = state->m_sprite_ram[offs + 2] & 0x80;
int flipy = state->m_sprite_ram[offs + 1] & 0x80;
/* On the real board, the x and y are read inverted after the first
* buffer stage. This due to the fact that the 82S09 delivers complements
* of stored data on read!
*/
x = (x + add_x + 1) & 0xFF;
int x = (state->m_sprite_ram[offs + 3] + add_x + 1) & 0xFF;
if (state->m_flip)
x ^= 0xFF;
y = (y + add_y + 1 + scanline_vfc) & 0x0F;
{
x = (x ^ 0xFF) - 15;
flipx = !flipx;
}
y = scanline - ((y + add_y + 1 + scanline_vfc) & 0x0F);
if (state->m_flip)
{
drawgfx_transpen(bitmap,cliprect,machine.gfx[1],
(state->m_sprite_ram[offs + 1] & 0x7f) + ((state->m_sprite_ram[offs + 2] & mask_bank) << shift_bits),
(state->m_sprite_ram[offs + 2] & 0x0f) + 16 * state->m_palette_bank,
!(state->m_sprite_ram[offs + 2] & 0x80),(state->m_sprite_ram[offs + 1] & 0x80),
x-15, scanline-y,0);
}
else
{
drawgfx_transpen(bitmap,cliprect,machine.gfx[1],
(state->m_sprite_ram[offs + 1] & 0x7f) + ((state->m_sprite_ram[offs + 2] & mask_bank) << shift_bits),
(state->m_sprite_ram[offs + 2] & 0x0f) + 16 * state->m_palette_bank,
(state->m_sprite_ram[offs + 2] & 0x80),(state->m_sprite_ram[offs + 1] & 0x80),
x, scanline-y,0);
}
drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, flipx, flipy, x, y, 0);
// wraparound
drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, flipx, flipy, state->m_flip ? x + 256 : x - 256, y, 0);
drawgfx_transpen(bitmap, cliprect, machine.gfx[1], code, color, flipx, flipy, x, y - 256, 0);
num_sprt++;
}