/* Flower Video Hardware */
#include "driver.h"
static tilemap *flower_bg0_tilemap, *flower_bg1_tilemap, *flower_text_tilemap, *flower_text_right_tilemap;
UINT8 *flower_textram, *flower_bg0ram, *flower_bg1ram, *flower_bg0_scroll, *flower_bg1_scroll;
PALETTE_INIT( flower )
{
int i;
for (i=0; i<256; i++)
{
palette_set_color_rgb(machine, i, pal4bit(color_prom[i]), pal4bit(color_prom[i+0x100]), pal4bit(color_prom[i+0x200]));
colortable[i] = i;
}
}
static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect )
{
const gfx_element *gfx = machine->gfx[1];
UINT8 *source = spriteram + 0x200;
UINT8 *finish = source - 0x200;
source -= 8;
while( source>=finish )
{
int xblock,yblock;
int sy = 256-32-source[0]+1;
int sx = (source[4]|(source[5]<<8))-55;
int code = source[1] & 0x3f;
int color = (source[6]>>4);
/*
Byte 0: Y
Byte 1:
0x80 - FlipY
0x40 - FlipX
0x3f - Tile
Byte 2:
0x08 - Tile MSB
0x01 - Tile MSB
Byte 3:
0x07 - X Zoom
0x08 - X Size
0x70 - Y Zoom
0x80 - Y Size
Byte 4: X LSB
Byte 5: X MSB
Byte 6:
0xf0 - Colour
*/
int flipy = source[1] & 0x80;
int flipx = source[1] & 0x40;
int size = source[3];
int xsize = ((size & 0x08)>>3);
int ysize = ((size & 0x80)>>7);
xsize++;
ysize++;
if (ysize==2) sy -= 16;
code |= ((source[2] & 0x01) << 6);
code |= ((source[2] & 0x08) << 4);
if(flip_screen)
{
flipx = !flipx;
flipy = !flipy;
sx = sx+16;
sy = 250-sy;
if (ysize==2) sy += 16;
}
for (xblock = 0; xblock<xsize; xblock++)
{
int xoffs=!flipx ? (xblock*8) : ((xsize-xblock-1)*8);
int zoomx=((size&7)+1)<<13;
int zoomy=((size&0x70)+0x10)<<9;
int xblocksizeinpixels=(zoomx*16)>>16;
int yblocksizeinpixels=(zoomy*16)>>16;
for (yblock = 0; yblock<ysize; yblock++)
{
int yoffs=!flipy ? yblock : (ysize-yblock-1);
int sxoffs=(16-xblocksizeinpixels)/2;
int syoffs=(16-yblocksizeinpixels)/2;
if (xblock) sxoffs+=xblocksizeinpixels;
if (yblock) syoffs+=yblocksizeinpixels;
drawgfxzoom(bitmap,gfx,
code+yoffs+xoffs,
color,
flipx,flipy,
sx+sxoffs,sy+syoffs,
cliprect,TRANSPARENCY_PEN,15,
zoomx,zoomy);
}
}
source -= 8;
}
}
static TILE_GET_INFO( get_bg0_tile_info )
{
int code = flower_bg0ram[tile_index];
int color = flower_bg0ram[tile_index+0x100];
/* Todo - may be tile flip bits? */
SET_TILE_INFO(2, code, color>>4, 0);
}
static TILE_GET_INFO( get_bg1_tile_info )
{
int code = flower_bg1ram[tile_index];
int color = flower_bg1ram[tile_index+0x100];
/* Todo - may be tile flip bits? */
SET_TILE_INFO(2, code, color>>4, 0);
}
static TILE_GET_INFO( get_text_tile_info )
{
int code = flower_textram[tile_index];
int color = flower_textram[tile_index+0x400];
/* Todo - may be tile flip bits? */
SET_TILE_INFO(0, code, color>>2, 0);
}
VIDEO_START(flower)
{
flower_bg0_tilemap = tilemap_create(get_bg0_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN, 16,16,16,16);
flower_bg1_tilemap = tilemap_create(get_bg1_tile_info, tilemap_scan_rows,TILEMAP_TYPE_PEN,16,16,16,16);
flower_text_tilemap = tilemap_create(get_text_tile_info,tilemap_scan_rows,TILEMAP_TYPE_PEN, 8, 8,32,32);
flower_text_right_tilemap = tilemap_create(get_text_tile_info,tilemap_scan_cols,TILEMAP_TYPE_PEN, 8, 8, 2,32);
tilemap_set_transparent_pen(flower_bg1_tilemap,15);
tilemap_set_transparent_pen(flower_text_tilemap,3);
tilemap_set_transparent_pen(flower_text_right_tilemap,3);
tilemap_set_scrolly(flower_text_tilemap, 0, 16);
tilemap_set_scrolly(flower_text_right_tilemap, 0, 16);
}
VIDEO_UPDATE( flower )
{
rectangle myclip = *cliprect;
tilemap_set_scrolly(flower_bg0_tilemap,0, flower_bg0_scroll[0]+16);
tilemap_set_scrolly(flower_bg1_tilemap,0, flower_bg1_scroll[0]+16);
tilemap_draw(bitmap,cliprect,flower_bg0_tilemap,0,0);
tilemap_draw(bitmap,cliprect,flower_bg1_tilemap,0,0);
draw_sprites(machine,bitmap,cliprect);
if(flip_screen)
{
myclip.min_x = cliprect->min_x;
myclip.max_x = cliprect->min_x + 15;
}
else
{
myclip.min_x = cliprect->max_x - 15;
myclip.max_x = cliprect->max_x;
}
tilemap_draw(bitmap,cliprect,flower_text_tilemap,0,0);
tilemap_draw(bitmap,&myclip,flower_text_right_tilemap,0,0);
return 0;
}
WRITE8_HANDLER( flower_textram_w )
{
flower_textram[offset] = data;
tilemap_mark_tile_dirty(flower_text_tilemap, offset);
tilemap_mark_all_tiles_dirty(flower_text_right_tilemap);
}
WRITE8_HANDLER( flower_bg0ram_w )
{
flower_bg0ram[offset] = data;
tilemap_mark_tile_dirty(flower_bg0_tilemap, offset & 0x1ff);
}
WRITE8_HANDLER( flower_bg1ram_w )
{
flower_bg1ram[offset] = data;
tilemap_mark_tile_dirty(flower_bg1_tilemap, offset & 0x1ff);
}
WRITE8_HANDLER( flower_flipscreen_w )
{
flip_screen_set(data);
}