/*-------------------------------------------------
drawgfx_alphastore - render a gfx element with
a single transparent pen, storing the alpha value
in alpha field of ARGB32, negative alpha implies alphatable
-------------------------------------------------*/
static void drawgfx_alphastore(bitmap_rgb32 &dest, const rectangle &cliprect, gfx_element *gfx,
UINT32 code, UINT32 color, int flipx, int flipy, INT32 destx, INT32 desty,
int fixedalpha)
{
psikyosh_state *state = gfx->machine().driver_data<psikyosh_state>();
UINT8 *alphatable = state->m_alphatable;
DECLARE_NO_PRIORITY;
const pen_t *paldata;
assert(dest.bpp() == 32);
assert(dest.format() == BITMAP_FORMAT_ARGB32);
assert(gfx != NULL);
assert(alphatable != NULL);
/* if we have a fixed alpha, call the standard drawgfx_transpen */
if (fixedalpha == 0xff)
{
drawgfx_transpen(dest, cliprect, gfx, code, color, flipx, flipy, destx, desty, 0);
return;
}
/* get final code and color, and grab lookup tables */
code %= gfx->elements();
color %= gfx->colors();
paldata = &gfx->machine().pens[gfx->colorbase() + gfx->granularity() * color];
/* early out if completely transparent */
if (gfx->has_pen_usage() && (gfx->pen_usage(code) & ~(1 << 0)) == 0)
return;
if (fixedalpha >= 0)
{
UINT8 alpha = fixedalpha;
DRAWGFX_CORE(UINT32, PIXEL_OP_REMAP_TRANS0_ALPHASTORE32, NO_PRIORITY);
}
else
{
DRAWGFX_CORE(UINT32, PIXEL_OP_REMAP_TRANS0_ALPHATABLESTORE32, NO_PRIORITY);
}
}
