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path: root/src/mame/video/raiden2.cpp
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// license:LGPL-2.1+
// copyright-holders:Olivier Galibert, Angelo Salese, David Haywood, Tomasz Slanina
/********************************************************************************************************

    Seibu Protected 1993-94 era hardware, V30 based (sequel to the SYS68C hardware)

********************************************************************************************************/

#include "emu.h"
#include "includes/raiden2.h"

WRITE16_MEMBER(raiden2_state::m_videoram_private_w)
{
	//  map(0x0d000, 0x0d7ff).ram().w(FUNC(raiden2_state::background_w)).share("back_data");
	//  map(0x0d800, 0x0dfff).ram().w(FUNC(raiden2_state::foreground_w).share("fore_data");
	//  map(0x0e000, 0x0e7ff).ram().w(FUNC(raiden2_state::midground_w).share("mid_data");
	//  map(0x0e800, 0x0f7ff).ram().w(FUNC(raiden2_state::text_w).share("text_data");

	if (offset < 0x800 / 2)
	{
		background_w(offset, data, 0xffff);
	}
	else if (offset < 0x1000 /2)
	{
		offset -= 0x800 / 2;
		foreground_w(offset, data, 0xffff);
	}
	else if (offset < 0x1800/2)
	{
		offset -= 0x1000 / 2;
		midground_w(offset, data, 0xffff);
	}
	else if (offset < 0x2800/2)
	{
		offset -= 0x1800 / 2;
		text_w(offset, data, 0xffff);
	}
}


void raiden2_state::draw_sprites(const rectangle &cliprect)
{
	m_sprite_bitmap.fill(0xf, cliprect);

	gfx_element *gfx = m_gfxdecode->gfx(2);

	/*
	  00 fhhh Fwww ppcc cccc   h = height f=flipy w = width F = flipx p = priority c = color
	  02 nnnn nnnn nnnn nnnn   n = tileno
	  04 xxxx xxxx xxxx xxxx   x = xpos
	  06 yyyy yyyy yyyy yyyy   y = ypos
	 */

	for (int srcindex = (m_spriteram->bytes()/2)-4; srcindex >= 0; srcindex -= 4)
	{
		u16 *source = &m_spriteram->buffer()[srcindex];
		int tile_number = source[1];
		int sx = source[2];
		int sy = source[3];
		int colr;
		int xtiles, ytiles;
		int ytlim, xtlim;
		int xflip, yflip;
		int xstep, ystep;
		int pri;

		ytlim = (source[0] >> 12) & 0x7;
		xtlim = (source[0] >> 8 ) & 0x7;

		xflip = (source[0] >> 15) & 0x1;
		yflip = (source[0] >> 11) & 0x1;

		colr = source[0] & 0x3f;

		pri = (source[0] >> 6) & 3;

		colr |= pri << (14-4);

		ytlim += 1;
		xtlim += 1;

		xstep = 16;
		ystep = 16;

		if (xflip)
		{
			ystep = -16;
			sy += ytlim*16-16;
		}

		if (yflip)
		{
			xstep = -16;
			sx += xtlim*16-16;
		}

		for (xtiles = 0; xtiles < xtlim; xtiles++)
		{
			for (ytiles = 0; ytiles < ytlim; ytiles++)
			{
				/* note this wraparound handling could be wrong if some of the COP maths is wrong */

#define ZEROTEAM_MASK_X (0x1ff) // causes a blank square in the corner of zero team, but otherwise the thrusters of the ship in the r2 intro are clipped, using 0x8000 as a sign bit instead of this logic works for r2, but not zero team
#define ZEROTEAM_MASK_Y (0x1ff)



						gfx->transpen_raw(
						m_sprite_bitmap,
						cliprect,
						tile_number,
						colr << 4,
						yflip,xflip,
						(sx+xstep*xtiles)&ZEROTEAM_MASK_X,(sy+ystep*ytiles)&ZEROTEAM_MASK_Y, 15);


						gfx->transpen_raw(
						m_sprite_bitmap,
						cliprect,
						tile_number,
						colr << 4,
						yflip,xflip,
						((sx+xstep*xtiles)&ZEROTEAM_MASK_X)-0x200,(sy+ystep*ytiles)&ZEROTEAM_MASK_Y, 15);


						gfx->transpen_raw(
						m_sprite_bitmap,
						cliprect,
						tile_number,
						colr << 4,
						yflip,xflip,
						(sx+xstep*xtiles)&ZEROTEAM_MASK_X,((sy+ystep*ytiles)&ZEROTEAM_MASK_Y)-0x200, 15);


						gfx->transpen_raw(
						m_sprite_bitmap,
						cliprect,
						tile_number,
						colr << 4,
						yflip,xflip,
						((sx+xstep*xtiles)&ZEROTEAM_MASK_X)-0x200,((sy+ystep*ytiles)&ZEROTEAM_MASK_Y)-0x200, 15);


				tile_number++;
			}
		}
	}

}

void raiden2_state::background_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_back_data[offset]);
	m_background_layer->mark_tile_dirty(offset);
}

void raiden2_state::midground_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_mid_data[offset]);
	m_midground_layer->mark_tile_dirty(offset);
}

void raiden2_state::foreground_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_fore_data[offset]);
	m_foreground_layer->mark_tile_dirty(offset);
}

void raiden2_state::text_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_text_data[offset]);
	m_text_layer->mark_tile_dirty(offset);
}

void raiden2_state::tilemap_enable_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_tilemap_enable);
}

void raiden2_state::tile_scroll_w(offs_t offset, u16 data, u16 mem_mask)
{
	tilemap_t *tm = nullptr;
	switch (offset/2)
	{
	case 0: tm = m_background_layer; break;
	case 1: tm = m_midground_layer; break;
	case 2: tm = m_foreground_layer; break;
	default: assert(0); break;
	}

	COMBINE_DATA(&m_scrollvals[offset]);
	data = m_scrollvals[offset];

	if (offset & 1)
		tm->set_scrolly(0, data);
	else
		tm->set_scrollx(0, data);
}

void raiden2_state::tile_bank_01_w(u8 data)
{
	int new_bank;
	new_bank = 0 | ((data & 1)<<1);
	if (new_bank != m_bg_bank)
	{
		m_bg_bank = new_bank;
		m_background_layer->mark_all_dirty();
	}

	new_bank = 1 | (data & 2);
	if (new_bank != m_mid_bank)
	{
		m_mid_bank = new_bank;
		m_midground_layer->mark_all_dirty();
	}
}

u16 raiden2_state::cop_tile_bank_2_r()
{
	return m_cop_bank;
}

void raiden2_state::cop_tile_bank_2_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_cop_bank);

	if (ACCESSING_BITS_8_15)
	{
		int new_bank = 4 | (data >> 14);
		if (new_bank != m_fg_bank)
		{
			m_fg_bank = new_bank;
			m_foreground_layer->mark_all_dirty();
		}
	}
}

void raiden2_state::raidendx_cop_bank_2_w(offs_t offset, u16 data, u16 mem_mask)
{
	COMBINE_DATA(&m_cop_bank);

	int new_bank = 4 | ((m_cop_bank >> 4) & 3);
	if (new_bank != m_fg_bank)
	{
		m_fg_bank = new_bank;
		m_foreground_layer->mark_all_dirty();
	}

	/* mainbank2 coming from 6c9 ? */
	int bb = m_cop_bank >> 12;
	m_mainbank[0]->set_entry(bb + 16);
	m_mainbank[1]->set_entry(3);
}


TILE_GET_INFO_MEMBER(raiden2_state::get_back_tile_info)
{
	int tile = m_back_data[tile_index];
	int color = (tile >> 12) | (0 << 4);

	tile = (tile & 0xfff) | (m_bg_bank << 12);

	SET_TILE_INFO_MEMBER(1,tile+0x0000,color,0);
}

TILE_GET_INFO_MEMBER(raiden2_state::get_mid_tile_info)
{
	int tile = m_mid_data[tile_index];
	int color = (tile >> 12) | (2 << 4);

	tile = (tile & 0xfff) | (m_mid_bank << 12);

	SET_TILE_INFO_MEMBER(1,tile,color,0);
}

TILE_GET_INFO_MEMBER(raiden2_state::get_fore_tile_info)
{
	int tile = m_fore_data[tile_index];
	int color = (tile >> 12) | (1 << 4);

	tile = (tile & 0xfff) | (m_fg_bank << 12);

	SET_TILE_INFO_MEMBER(1,tile,color,0);
}

TILE_GET_INFO_MEMBER(raiden2_state::get_text_tile_info)
{
	int tile = m_text_data[tile_index];
	int color = (tile>>12)&0xf;

	tile &= 0xfff;

	SET_TILE_INFO_MEMBER(0,tile + m_tx_bank * 0x1000,color,0);
}

void raiden2_state::video_start()
{
	m_screen->register_screen_bitmap(m_tile_bitmap);
	m_screen->register_screen_bitmap(m_sprite_bitmap);

	m_back_data = make_unique_clear<u16[]>(0x800/2);
	m_fore_data = make_unique_clear<u16[]>(0x800/2);
	m_mid_data = make_unique_clear<u16[]>(0x800/2);
	m_text_data = make_unique_clear<u16[]>(0x1000/2);
	m_palette_data = make_unique_clear<u16[]>(0x1000/2);
	m_palette->basemem().set(m_palette_data.get(), 0x1000/2 * sizeof(u16), 16, ENDIANNESS_LITTLE, 2);

	save_pointer(NAME(m_back_data), 0x800/2);
	save_pointer(NAME(m_fore_data), 0x800/2);
	save_pointer(NAME(m_mid_data), 0x800/2);
	save_pointer(NAME(m_text_data), 0x1000/2);
	save_pointer(NAME(m_palette_data), 0x1000/2);

	m_text_layer       = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(raiden2_state::get_text_tile_info)), TILEMAP_SCAN_ROWS,  8, 8, 64,32 );
	m_background_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(raiden2_state::get_back_tile_info)), TILEMAP_SCAN_ROWS, 16,16, 32,32 );
	m_midground_layer  = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(raiden2_state::get_mid_tile_info)),  TILEMAP_SCAN_ROWS, 16,16, 32,32 );
	m_foreground_layer = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(*this, FUNC(raiden2_state::get_fore_tile_info)), TILEMAP_SCAN_ROWS, 16,16, 32,32 );
}

void raiden2_state::blend_layer(bitmap_rgb32 &bitmap, const rectangle &cliprect, bitmap_ind16 &source, int layer)
{
	if (layer == -1)
		return;

	const pen_t *pens = &m_palette->pen(0);
	layer <<= 14;
	for (int y = cliprect.min_y; y <= cliprect.max_y; y++)
	{
		const u16 *src = &source.pix16(y, cliprect.min_x);
		u32 *dst = &bitmap.pix32(y, cliprect.min_x);
		for (int x = cliprect.min_x; x <= cliprect.max_x; x++)
		{
			u16 val = *src++;
			if ((val & 0xc000) == layer && (val & 0x000f) != 0x000f)
			{
				val &= 0x07ff;

				if (m_blend_active[val])
					*dst = alpha_blend_r32(*dst, pens[val], 0x7f);
				else
					*dst = pens[val];
			}
			dst++;
		}
	}
}

void raiden2_state::tilemap_draw_and_blend(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect, tilemap_t *tilemap)
{
	tilemap->draw(screen, m_tile_bitmap, cliprect, 0, 0);
	blend_layer(bitmap, cliprect, m_tile_bitmap, 0);
}

u32 raiden2_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
	bitmap.fill(m_palette->black_pen(), cliprect);
	if (!(m_tilemap_enable & 16))
	{
		draw_sprites(cliprect);

		blend_layer(bitmap, cliprect, m_sprite_bitmap, m_cur_spri[0]);
	}

	if (!(m_tilemap_enable & 1))
		tilemap_draw_and_blend(screen, bitmap, cliprect, m_background_layer);

	if (!(m_tilemap_enable & 16))
		blend_layer(bitmap, cliprect, m_sprite_bitmap, m_cur_spri[1]);

	if (!(m_tilemap_enable & 2))
		tilemap_draw_and_blend(screen, bitmap, cliprect, m_midground_layer);

	if (!(m_tilemap_enable & 16))
		blend_layer(bitmap, cliprect, m_sprite_bitmap, m_cur_spri[2]);

	if (!(m_tilemap_enable & 4))
		tilemap_draw_and_blend(screen, bitmap, cliprect, m_foreground_layer);

	if (!(m_tilemap_enable & 16))
		blend_layer(bitmap, cliprect, m_sprite_bitmap, m_cur_spri[3]);

	if (!(m_tilemap_enable & 8))
		tilemap_draw_and_blend(screen, bitmap, cliprect, m_text_layer);

	if (!(m_tilemap_enable & 16))
		blend_layer(bitmap, cliprect, m_sprite_bitmap, m_cur_spri[4]);

	if (machine().input().code_pressed_once(KEYCODE_Z))
		if (m_raiden2cop) m_raiden2cop->dump_table();

	return 0;
}