// license:BSD-3-Clause
// copyright-holders:Zsolt Vasvari
/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/funkybee.h"
void funkybee_state::funkybee_palette(palette_device &palette) const
{
const uint8_t *color_prom = memregion("proms")->base();
// first, the character/sprite palette
for (int i = 0; i < 32; i++)
{
int bit0, bit1, bit2;
// red component
bit0 = BIT(*color_prom, 0);
bit1 = BIT(*color_prom, 1);
bit2 = BIT(*color_prom, 2);
int const r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
// green component
bit0 = BIT(*color_prom, 3);
bit1 = BIT(*color_prom, 4);
bit2 = BIT(*color_prom, 5);
int const g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
// blue component
bit0 = 0;
bit1 = BIT(*color_prom, 6);
bit2 = BIT(*color_prom, 7);
int const b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette.set_pen_color(i, rgb_t(r, g, b));
color_prom++;
}
}
WRITE8_MEMBER(funkybee_state::funkybee_videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(funkybee_state::funkybee_colorram_w)
{
m_colorram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
WRITE_LINE_MEMBER(funkybee_state::gfx_bank_w)
{
m_gfx_bank = state;
machine().tilemap().mark_all_dirty();
}
WRITE8_MEMBER(funkybee_state::funkybee_scroll_w)
{
m_bg_tilemap->set_scrollx(0, flip_screen() ? -data : data);
}
WRITE_LINE_MEMBER(funkybee_state::flipscreen_w)
{
flip_screen_set(state);
}
TILE_GET_INFO_MEMBER(funkybee_state::get_bg_tile_info)
{
int code = m_videoram[tile_index] + ((m_colorram[tile_index] & 0x80) << 1);
int color = m_colorram[tile_index] & 0x03;
SET_TILE_INFO_MEMBER(m_gfx_bank, code, color, 0);
}
TILEMAP_MAPPER_MEMBER(funkybee_state::funkybee_tilemap_scan)
{
/* logical (col,row) -> memory offset */
return 256 * row + col;
}
void funkybee_state::video_start()
{
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(funkybee_state::get_bg_tile_info)), tilemap_mapper_delegate(*this, FUNC(funkybee_state::funkybee_tilemap_scan)), 8, 8, 32, 32);
}
void funkybee_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int offs;
for (offs = 0x0f; offs >= 0; offs--)
{
int offs2 = offs + 0x1e00;
int attr = m_videoram[offs2];
int code = (attr >> 2) | ((attr & 2) << 5);
int color = m_colorram[offs2 + 0x10];
int flipx = 0;
int flipy = attr & 0x01;
int sx = m_videoram[offs2 + 0x10];
int sy = 224 - m_colorram[offs2];
if (flip_screen())
{
sy += 32;
flipx = !flipx;
}
m_gfxdecode->gfx(2 + m_gfx_bank)->transpen(bitmap,cliprect,
code, color,
flipx, flipy,
sx, sy, 0);
}
}
void funkybee_state::draw_columns( bitmap_ind16 &bitmap, const rectangle &cliprect )
{
int offs;
for (offs = 0x1f; offs >= 0; offs--)
{
int const flip = flip_screen();
int code = m_videoram[0x1c00 + offs];
int color = m_colorram[0x1f10] & 0x03;
int sx = flip ? m_videoram[0x1f1f] : m_videoram[0x1f10];
int sy = offs * 8;
if (flip)
sy = 248 - sy;
m_gfxdecode->gfx(m_gfx_bank)->transpen(bitmap,cliprect,
code, color,
flip, flip,
sx, sy,0);
code = m_videoram[0x1d00 + offs];
color = m_colorram[0x1f11] & 0x03;
sx = flip ? m_videoram[0x1f1e] : m_videoram[0x1f11];
sy = offs * 8;
if (flip)
sy = 248 - sy;
m_gfxdecode->gfx(m_gfx_bank)->transpen(bitmap,cliprect,
code, color,
flip, flip,
sx, sy,0);
}
}
uint32_t funkybee_state::screen_update_funkybee(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
draw_sprites(bitmap, cliprect);
draw_columns(bitmap, cliprect);
return 0;
}