// license:BSD-3-Clause
// copyright-holders:Lee Taylor, Chris Moore
/*************************************************************************
Universal Cheeky Mouse Driver
(c)Lee Taylor May 1998, All rights reserved.
***************************************************************************
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/cheekyms.h"
/* bit 3 and 7 of the char color PROMs are used for something -- not currently emulated -
thus GAME_IMPERFECT_GRAPHICS */
PALETTE_INIT_MEMBER(cheekyms_state, cheekyms)
{
const uint8_t *color_prom = memregion("proms")->base();
int i, j, bit, r, g, b;
for (i = 0; i < 6; i++)
{
for (j = 0; j < 0x20; j++)
{
/* red component */
bit = (color_prom[0x20 * (i / 2) + j] >> ((4 * (i & 1)) + 0)) & 0x01;
r = 0xff * bit;
/* green component */
bit = (color_prom[0x20 * (i / 2) + j] >> ((4 * (i & 1)) + 1)) & 0x01;
g = 0xff * bit;
/* blue component */
bit = (color_prom[0x20 * (i / 2) + j] >> ((4 * (i & 1)) + 2)) & 0x01;
b = 0xff * bit;
palette.set_pen_color((i * 0x20) + j, rgb_t(r,g,b));
}
}
}
WRITE8_MEMBER(cheekyms_state::port_40_w)
{
m_sound_board->music_w(BIT(data, 7));
m_sound_board->cheese_w(BIT(data, 6));
m_sound_board->hammer_w(BIT(data, 5));
m_sound_board->mouse_dies_w(BIT(data, 4));
m_sound_board->pest_dies_w(BIT(data, 3));
m_sound_board->mouse_w(BIT(data, 2));
m_sound_board->pest_w(BIT(data, 1));
}
WRITE8_MEMBER(cheekyms_state::port_80_w)
{
m_sound_board->coin_extra_w(BIT(data, 1));
m_sound_board->mute_w(BIT(data, 0));
/* d3-d5 - man scroll amount */
/* d6 - palette select (selects either 0 = PROM M9, 1 = PROM M8) */
/* d7 - screen flip */
*m_port_80 = data;
/* d2 - interrupt enable */
m_irq_mask = data & 4;
}
TILE_GET_INFO_MEMBER(cheekyms_state::get_tile_info)
{
int color;
int x = tile_index & 0x1f;
int y = tile_index >> 5;
int code = m_videoram[tile_index];
int palette = (*m_port_80 >> 2) & 0x10;
if (x >= 0x1e)
{
if (y < 0x0c)
color = 0x15;
else if (y < 0x14)
color = 0x16;
else
color = 0x14;
}
else
{
if ((y == 0x04) || (y == 0x1b))
color = palette | 0x0c;
else
color = palette | (x >> 1);
}
SET_TILE_INFO_MEMBER(0, code, color, 0);
}
void cheekyms_state::video_start()
{
int width, height;
width = m_screen->width();
height = m_screen->height();
m_bitmap_buffer = std::make_unique<bitmap_ind16>(width, height);
m_cm_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(cheekyms_state::get_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_cm_tilemap->set_transparent_pen(0);
}
void cheekyms_state::draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect, gfx_element *gfx, int flip )
{
offs_t offs;
for (offs = 0; offs < 0x20; offs += 4)
{
int x, y, code, color;
if ((m_spriteram[offs + 3] & 0x08) == 0x00) continue;
x = 256 - m_spriteram[offs + 2];
y = m_spriteram[offs + 1];
code = (~m_spriteram[offs + 0] & 0x0f) << 1;
color = (~m_spriteram[offs + 3] & 0x07);
if (m_spriteram[offs + 0] & 0x80)
{
if (!flip)
code++;
gfx->transpen(bitmap,cliprect, code, color, 0, 0, x, y, 0);
}
else
{
if (m_spriteram[offs + 0] & 0x02)
{
gfx->transpen(bitmap,cliprect, code | 0x20, color, 0, 0, x, y, 0);
gfx->transpen(bitmap,cliprect, code | 0x21, color, 0, 0, 0x10 + x, y, 0);
}
else
{
gfx->transpen(bitmap,cliprect, code | 0x20, color, 0, 0, x, y, 0);
gfx->transpen(bitmap,cliprect, code | 0x21, color, 0, 0, x, 0x10 + y, 0);
}
}
}
}
uint32_t cheekyms_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
int y, x;
int scrolly = ((*m_port_80 >> 3) & 0x07);
int flip = *m_port_80 & 0x80;
machine().tilemap().mark_all_dirty();
machine().tilemap().set_flip_all(flip ? TILEMAP_FLIPX | TILEMAP_FLIPY : 0);
bitmap.fill(0, cliprect);
m_bitmap_buffer->fill(0, cliprect);
/* sprites go under the playfield */
draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(1), flip);
/* draw the tilemap to a temp bitmap */
m_cm_tilemap->draw(screen, *m_bitmap_buffer, cliprect, 0, 0);
/* draw the tilemap to the final bitmap applying the scroll to the man character */
for (y = cliprect.min_y; y <= cliprect.max_y; y++)
{
for (x = cliprect.min_x; x <= cliprect.max_x; x++)
{
int in_man_area;
if (flip)
{
in_man_area = (x >= (32 - 12 - 1) * 8 && x < (32 - 8) * 8 && y > 5 * 8 && y < 27 * 8);
}
else
{
in_man_area = (x >= 8 * 8 && x < 12 * 8 && y > 5 * 8 && y < 27 * 8);
}
if (in_man_area)
{
if ((y + scrolly) < 27 * 8 && m_bitmap_buffer->pix16(y + scrolly, x) != 0)
bitmap.pix16(y, x) = m_bitmap_buffer->pix16(y + scrolly, x);
}
else
{
if(m_bitmap_buffer->pix16(y, x) != 0)
bitmap.pix16(y, x) = m_bitmap_buffer->pix16(y, x);
}
}
}
return 0;
}