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// license:BSD-3-Clause
// copyright-holders:Luca Elia
/***************************************************************************
-= Blomby Car =-
driver by Luca Elia (l.elia@tin.it)
Note: if MAME_DEBUG is defined, pressing Z with:
Q shows the background
W shows the foreground
A shows the sprites
Keys can be used together!
[ 2 Scrolling Layers ]
The Tilemaps are 64 x 32 tiles in size (1024 x 512).
Tiles are 16 x 16 x 4, with 32 color codes and 2 priority
leves (wrt sprites). Each tile needs 4 bytes.
[ 1024? Sprites ]
They use the same graphics the tilemaps use (16 x 16 x 4 tiles)
with 16 color codes and 2 levels of priority
***************************************************************************/
#include "emu.h"
#include "includes/blmbycar.h"
#include "screen.h"
/***************************************************************************
Tilemaps
Offset: Bits: Value:
0.w Code
2.w fedc ba98 ---- ----
---- ---- 7--- ---- Flip Y
---- ---- -6-- ---- Flip X
---- ---- --5- ---- Priority (0 = Low)
---- ---- ---4 3210 Color
***************************************************************************/
#define DIM_NX (0x40)
#define DIM_NY (0x20)
template<int Layer>
TILE_GET_INFO_MEMBER(blmbycar_state::get_tile_info)
{
uint16_t code = m_vram[Layer][tile_index * 2 + 0];
uint16_t attr = m_vram[Layer][tile_index * 2 + 1];
SET_TILE_INFO_MEMBER(0,
code,
attr & 0x1f,
TILE_FLIPYX((attr >> 6) & 3));
tileinfo.category = (attr >> 5) & 1;
}
/***************************************************************************
Video Init
***************************************************************************/
void blmbycar_state::video_start()
{
m_tilemap[0] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(blmbycar_state::get_tile_info<0>),this), TILEMAP_SCAN_ROWS, 16, 16, DIM_NX, DIM_NY );
m_tilemap[1] = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(blmbycar_state::get_tile_info<1>),this), TILEMAP_SCAN_ROWS, 16, 16, DIM_NX, DIM_NY );
m_tilemap[1]->set_transparent_pen(0);
}
/***************************************************************************
Screen Drawing
***************************************************************************/
uint32_t blmbycar_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
m_sprites->draw_sprites(cliprect,m_spriteram,flip_screen());
m_tilemap[0]->set_scrolly(0, m_scroll[0][0]);
m_tilemap[0]->set_scrollx(0, m_scroll[0][1]);
m_tilemap[1]->set_scrolly(0, m_scroll[1][0] + 1);
m_tilemap[1]->set_scrollx(0, m_scroll[1][1] + 5);
screen.priority().fill(0, cliprect);
bitmap.fill(0, cliprect);
m_tilemap[0]->draw(screen, bitmap, cliprect, 0, 0);
m_tilemap[1]->draw(screen, bitmap, cliprect, 0, 0);
m_sprites->mix_sprites(bitmap, cliprect, 0);
m_tilemap[0]->draw(screen, bitmap, cliprect, 1, 1);
m_tilemap[1]->draw(screen, bitmap, cliprect, 1, 1);
m_sprites->mix_sprites(bitmap, cliprect, 1);
return 0;
}
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