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// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari
/***************************************************************************
spcforce.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/spcforce.h"
WRITE_LINE_MEMBER(spcforce_state::flip_screen_w)
{
flip_screen_set(!state);
}
uint32_t spcforce_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int offs;
int flip = flip_screen();
/* draw the characters as sprites because they could be overlapping */
bitmap.fill(0, cliprect);
for (offs = 0; offs < 0x400; offs++)
{
int code,sx,sy,col;
sy = 8 * (offs / 32) - (m_scrollram[offs] & 0x0f);
sx = 8 * (offs % 32) + ((m_scrollram[offs] >> 4) & 0x0f);
code = m_videoram[offs] + ((m_colorram[offs] & 0x01) << 8);
col = (~m_colorram[offs] >> 4) & 0x07;
if (flip)
{
sx = 248 - sx;
sy = 248 - sy;
}
m_gfxdecode->gfx(0)->transpen(bitmap,cliprect,
code, col,
flip, flip,
sx, sy,0);
}
return 0;
}
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