// license:BSD-3-Clause
// copyright-holders:Tatsuyuki Satoh
/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/appoooh.h"
/***************************************************************************
Convert the color PROMs into a more useable format.
Palette information of appoooh is not known.
The palette decoder of Bank Panic was used for this driver.
Because these hardware is similar.
***************************************************************************/
PALETTE_INIT_MEMBER(appoooh_state,appoooh)
{
const uint8_t *color_prom = memregion("proms")->base();
int i;
for (i = 0; i < palette.entries(); i++)
{
uint8_t pen;
int bit0, bit1, bit2, r, g, b;
if (i < 0x100)
/* charset #1 */
pen = (color_prom[0x020 + (i - 0x000)] & 0x0f) | 0x00;
else
/* charset #2 */
pen = (color_prom[0x120 + (i - 0x100)] & 0x0f) | 0x10;
/* red component */
bit0 = (color_prom[pen] >> 0) & 0x01;
bit1 = (color_prom[pen] >> 1) & 0x01;
bit2 = (color_prom[pen] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[pen] >> 3) & 0x01;
bit1 = (color_prom[pen] >> 4) & 0x01;
bit2 = (color_prom[pen] >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (color_prom[pen] >> 6) & 0x01;
bit2 = (color_prom[pen] >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
PALETTE_INIT_MEMBER(appoooh_state,robowres)
{
const uint8_t *color_prom = memregion("proms")->base();
int i;
for (i = 0; i < palette.entries(); i++)
{
int bit0, bit1, bit2, r, g, b;
uint8_t pen = color_prom[0x020 + i] & 0x0f;
/* red component */
bit0 = (color_prom[pen] >> 0) & 0x01;
bit1 = (color_prom[pen] >> 1) & 0x01;
bit2 = (color_prom[pen] >> 2) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (color_prom[pen] >> 3) & 0x01;
bit1 = (color_prom[pen] >> 4) & 0x01;
bit2 = (color_prom[pen] >> 5) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (color_prom[pen] >> 6) & 0x01;
bit2 = (color_prom[pen] >> 7) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette.set_pen_color(i, rgb_t(r, g, b));
}
}
/***************************************************************************
Callbacks for the TileMap code
***************************************************************************/
TILE_GET_INFO_MEMBER(appoooh_state::get_fg_tile_info)
{
int code = m_fg_videoram[tile_index] + 256 * ((m_fg_colorram[tile_index] >> 5) & 7);
SET_TILE_INFO_MEMBER(0,
code,
m_fg_colorram[tile_index] & 0x0f,
(m_fg_colorram[tile_index] & 0x10 ) ? TILEMAP_FLIPX : 0
);
}
TILE_GET_INFO_MEMBER(appoooh_state::get_bg_tile_info)
{
int code = m_bg_videoram[tile_index] + 256 * ((m_bg_colorram[tile_index] >> 5) & 7);
SET_TILE_INFO_MEMBER(1,
code,
m_bg_colorram[tile_index] & 0x0f,
(m_bg_colorram[tile_index] & 0x10 ) ? TILEMAP_FLIPX : 0
);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
void appoooh_state::video_start()
{
m_fg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(appoooh_state::get_fg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(appoooh_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 32, 32);
m_fg_tilemap->set_transparent_pen(0);
m_fg_tilemap->set_scrolldy(8, 8);
m_bg_tilemap->set_scrolldy(8, 8);
save_item(NAME(m_scroll_x));
save_item(NAME(m_priority));
}
WRITE8_MEMBER(appoooh_state::scroll_w)
{
m_scroll_x = data;
}
WRITE8_MEMBER(appoooh_state::fg_videoram_w)
{
m_fg_videoram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(appoooh_state::fg_colorram_w)
{
m_fg_colorram[offset] = data;
m_fg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(appoooh_state::bg_videoram_w)
{
m_bg_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(appoooh_state::bg_colorram_w)
{
m_bg_colorram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
}
WRITE8_MEMBER(appoooh_state::out_w)
{
/* bit 0 controls NMI */
m_nmi_mask = data & 1;
/* bit 1 flip screen */
flip_screen_set(data & 0x02);
/* bits 2-3 unknown */
/* bits 4-5 are playfield/sprite priority */
/* TODO: understand how this works, currently the only thing I do is draw */
/* the front layer behind sprites when priority == 0, and invert the sprite */
/* order when priority == 1 */
m_priority = (data & 0x30) >> 4;
/* bit 6 ROM bank select */
{
membank("bank1")->set_entry((data&0x40) ? 1 : 0);
}
/* bit 7 unknown (used) */
}
void appoooh_state::appoooh_draw_sprites( bitmap_ind16 &dest_bmp, const rectangle &cliprect, gfx_element *gfx, uint8_t *sprite )
{
int offs;
int flipy = flip_screen();
for (offs = 0x20 - 4; offs >= 0; offs -= 4)
{
int sy = 240 - sprite[offs + 0];
int code = (sprite[offs + 1] >> 2) + ((sprite[offs + 2] >> 5) & 0x07) * 0x40;
int color = sprite[offs + 2] & 0x0f; /* TODO: bit 4 toggles continuously, what is it? */
int sx = sprite[offs + 3];
int flipx = sprite[offs + 1] & 0x01;
if(sx >= 248)
sx -= 256;
if (flipy)
{
sx = 239 - sx;
sy = 239 - sy;
flipx = !flipx;
}
gfx->transpen(dest_bmp,cliprect,
code,
color,
flipx,flipy,
sx, sy, 0);
}
}
void appoooh_state::robowres_draw_sprites( bitmap_ind16 &dest_bmp, const rectangle &cliprect, gfx_element *gfx, uint8_t *sprite )
{
int offs;
int flipy = flip_screen();
for (offs = 0x20 - 4; offs >= 0; offs -= 4)
{
int sy = 240 - sprite[offs + 0];
int code = 0x200 + (sprite[offs + 1] >> 2) + ((sprite[offs + 2] >> 5) & 0x07) * 0x40;
int color = sprite[offs + 2] & 0x0f; /* TODO: bit 4 toggles continuously, what is it? */
int sx = sprite[offs + 3];
int flipx = sprite[offs + 1] & 0x01;
if(sx >= 248)
sx -= 256;
if (flipy)
{
sx = 239 - sx;
sy = 239 - sy;
flipx = !flipx;
}
gfx->transpen(dest_bmp,cliprect,
code,
color,
flipx,flipy,
sx, sy, 0);
}
}
uint32_t appoooh_state::screen_update_appoooh(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
if (m_priority == 0) /* fg behind sprites */
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
/* draw sprites */
if (m_priority == 1)
{
/* sprite set #1 */
appoooh_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(2), m_spriteram);
/* sprite set #2 */
appoooh_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(3), m_spriteram_2);
}
else
{
/* sprite set #2 */
appoooh_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(3), m_spriteram_2);
/* sprite set #1 */
appoooh_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(2), m_spriteram);
}
if (m_priority != 0) /* fg in front of sprites */
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}
uint32_t appoooh_state::screen_update_robowres(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
if (m_priority == 0) /* fg behind sprites */
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
/* draw sprites */
if (m_priority == 1)
{
/* sprite set #1 */
robowres_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(2), m_spriteram);
/* sprite set #2 */
robowres_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(3), m_spriteram_2);
}
else
{
/* sprite set #2 */
robowres_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(3), m_spriteram_2);
/* sprite set #1 */
robowres_draw_sprites(bitmap, cliprect, m_gfxdecode->gfx(2), m_spriteram);
}
if (m_priority != 0) /* fg in front of sprites */
m_fg_tilemap->draw(screen, bitmap, cliprect, 0, 0);
return 0;
}