/* Diver Boy - Video Hardware */

#include "driver.h"

data16_t *diverboy_spriteram;
size_t diverboy_spriteram_size;


VIDEO_START(diverboy)
{
	return 0;
}

static void diverboy_drawsprites( struct mame_bitmap *bitmap, const struct rectangle *cliprect )
{
	data16_t *source = diverboy_spriteram;
	data16_t *finish = source + diverboy_spriteram_size/2;

	while (source < finish)
	{
		int xpos,ypos,number,colr,bank,flash;

		ypos = source[4];
		xpos = source[0];
		colr = (source[1]& 0x00f0) >> 4;
		number = source[3];
		flash = source[1] & 0x1000;

		colr |= ((source[1] & 0x000c) << 2);

		ypos = 0x100 - ypos;

		bank = (source[1]&0x0002) >> 1;

		if (!flash || (cpu_getcurrentframe() & 1))
		{
			drawgfx(bitmap,Machine->gfx[bank],
					number,
					colr,
					0,0,
					xpos,ypos,
					cliprect,(source[1] & 0x0008) ? TRANSPARENCY_NONE : TRANSPARENCY_PEN,0);
		}

		source+=8;
	}
}

VIDEO_UPDATE(diverboy)
{
/*	fillbitmap(bitmap,get_black_pen(),cliprect);*/
	diverboy_drawsprites(bitmap,cliprect);
}
