home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
AmigActive 10
/
AACD 10.iso
/
AACD
/
Games
/
MAME
/
src
/
vidhrdw
/
pinbo.c
< prev
next >
Wrap
C/C++ Source or Header
|
2000-04-04
|
3KB
|
129 lines
/***************************************************************************
vidhrdw.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
#include "common.h"
#include "usrintrf.h"
#include "vidhrdw/generic.h"
static int flipscreen[2];
void pinbo_vh_convert_color_prom(unsigned char *palette, unsigned short *colortable,const unsigned char *color_prom)
{
int i;
for (i = 0;i < Machine->drv->total_colors;i++)
{
int bit0,bit1,bit2,bit3;
/* red component */
bit0 = (color_prom[0] >> 0) & 0x01;
bit1 = (color_prom[0] >> 1) & 0x01;
bit2 = (color_prom[0] >> 2) & 0x01;
bit3 = (color_prom[0] >> 3) & 0x01;
*(palette++) = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = (color_prom[Machine->drv->total_colors] >> 0) & 0x01;
bit1 = (color_prom[Machine->drv->total_colors] >> 1) & 0x01;
bit2 = (color_prom[Machine->drv->total_colors] >> 2) & 0x01;
bit3 = (color_prom[Machine->drv->total_colors] >> 3) & 0x01;
*(palette++) = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = (color_prom[2*Machine->drv->total_colors] >> 0) & 0x01;
bit1 = (color_prom[2*Machine->drv->total_colors] >> 1) & 0x01;
bit2 = (color_prom[2*Machine->drv->total_colors] >> 2) & 0x01;
bit3 = (color_prom[2*Machine->drv->total_colors] >> 3) & 0x01;
*(palette++) = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
color_prom++;
}
}
WRITE_HANDLER( pinbo_flipscreen_w )
{
if (flipscreen[0] != (data & 1))
{
flipscreen[0] = data & 1;
memset(dirtybuffer,1,videoram_size);
}
if (flipscreen[1] != (data & 2))
{
flipscreen[1] = data & 2;
memset(dirtybuffer,1,videoram_size);
}
}
void pinbo_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
int offs;
/* for every character in the Video RAM, check if it has been modified */
/* since last time and update it accordingly. */
for (offs = videoram_size - 1;offs >= 0;offs--)
{
if (dirtybuffer[offs])
{
int sx,sy;
dirtybuffer[offs] = 0;
sx = offs % 32;
sy = offs / 32;
if (flipscreen[0]) sx = 31 - sx;
if (flipscreen[1]) sy = 31 - sy;
drawgfx(tmpbitmap,Machine->gfx[0],
videoram[offs] + ((colorram[offs] & 0x70) << 5),
colorram[offs] & 0x0f,
flipscreen[0],flipscreen[1],
8*sx,8*sy,
&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
}
}
/* copy the character mapped graphics */
copybitmap(bitmap,tmpbitmap,0,0,0,0,&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
/* Draw the sprites. */
for (offs = spriteram_size - 4;offs >= 0;offs -= 4)
{
int sx,sy,flipx,flipy;
int code,color;
sx = spriteram[offs + 3];
sy = 240 - spriteram[offs];
flipx = spriteram[offs+1] & 0x40;
flipy = spriteram[offs+1] & 0x80;
if (flipscreen[0])
{
sx = 240 - sx;
flipx = !flipx;
}
if (flipscreen[1])
{
sy = 240 - sy;
flipy = !flipy;
}
code = (spriteram[offs+1] & 0x3f) | 0x40 | ((spriteram[offs+2] & 0x30) << 3);
color = (spriteram[offs+2] & 0x0f);
drawgfx(bitmap,Machine->gfx[1],
code,
color,
flipx,flipy,
sx,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
}