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fixed multiwidth sprites in decmxc06.c, removed code which appeared to serve no purpose other than to break the birdtry gfxdecode in machine/dec0.c [David Haywood]

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This commit is contained in:
Angelo Salese 2011-03-30 22:49:02 +00:00
parent 446be9ae42
commit 00f3454dae
2 changed files with 17 additions and 34 deletions
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19
src/mame/machine/dec0.c
View File

@ -417,24 +417,5 @@ DRIVER_INIT( hbarrel )
DRIVER_INIT( birdtry )
{
dec0_state *state = machine.driver_data<dec0_state>();
UINT8 *src, tmp;
int i, j, k;
state->GAME=3;
src = machine.region("gfx4")->base();
/* some parts of the graphic have bytes swapped */
for (k = 0;k < 0x70000;k += 0x20000)
{
for (i = 0x2000;i < 0x10000;i += 32)
{
for (j = 0;j < 16;j++)
{
tmp = src[k+i+j+16];
src[k+i+j+16] = src[k+i+j];
src[k+i+j] = tmp;
}
}
}
}

32
src/mame/video/decmxc06.c
View File

@ -32,8 +32,6 @@ todo:
Implement sprite/tilemap orthogonality (not strictly needed as no
games make deliberate use of it). (pdrawgfx, or rendering to bitmap for manual mixing)
fix multi-width support, used by birdie try
*/
@ -94,7 +92,6 @@ void deco_mxc06_device::draw_sprites( running_machine &machine, bitmap_t *bitmap
/* multi width used only on the title screen? */
code = spriteram[offs + 1] & 0x1fff;
sx = sx & 0x01ff;
sy = sy & 0x01ff;
@ -103,15 +100,7 @@ void deco_mxc06_device::draw_sprites( running_machine &machine, bitmap_t *bitmap
sx = 240 - sx;
sy = 240 - sy;
code &= ~(h-1);
if (flipy)
incy = -1;
else
{
code += h-1;
incy = 1;
}
if (flip_screen_get(machine))
{
sy = 240 - sy;
@ -125,6 +114,19 @@ void deco_mxc06_device::draw_sprites( running_machine &machine, bitmap_t *bitmap
for (x = 0; x < w; x++)
{
// maybe, birdie try appears to specify the base code for each part..
code = spriteram[offs + 1] & 0x1fff;
code &= ~(h-1);
if (flipy)
incy = -1;
else
{
code += h-1;
incy = 1;
}
for (y = 0; y < h; y++)
{
if (spriteram[offs] & 0x8000)
@ -155,7 +157,7 @@ void deco_mxc06_device::draw_sprites( running_machine &machine, bitmap_t *bitmap
if (draw)
{
drawgfx_transpen(bitmap,cliprect,machine.gfx[m_gfxregion],
code - y * incy + h * x,
code - y * incy,
color & col_mask,
flipx,flipy,
sx + (mult * x),sy + (mult * y),0);
@ -164,8 +166,8 @@ void deco_mxc06_device::draw_sprites( running_machine &machine, bitmap_t *bitmap
}
offs += 4;
if (offs >= 0x800 / 2 || spriteram[offs] & 0x8000) // seems the expected behaviour on the title screen - WRONG for birdie try
break;
if (offs >= 0x800 / 2)
return;
}
}
}