home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
AmigActive 10
/
AACD 10.iso
/
AACD
/
Games
/
MAME
/
src
/
vidhrdw
/
canyon.c
< prev
next >
Wrap
C/C++ Source or Header
|
2000-01-06
|
2KB
|
82 lines
/***************************************************************************
vidhrdw.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
/***************************************************************************
Draw the game screen in the given osd_bitmap.
Do NOT call osd_update_display() from this function, it will be called by
the main emulation engine.
***************************************************************************/
void canyon_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 (full_refresh || dirtybuffer[offs])
{
int charcode;
int sx,sy;
dirtybuffer[offs]=0;
charcode = videoram[offs] & 0x3F;
sx = 8 * (offs % 32);
sy = 8 * (offs / 32);
drawgfx(tmpbitmap,Machine->gfx[0],
charcode, (videoram[offs] & 0x80)>>7,
0,0,sx,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);
for (offs=0; offs<2; offs++)
{
int sx, sy;
int pic;
int flipx;
sx = 27*8 - spriteram[offs*2+1];
sy = 30*8 - spriteram[offs*2+8];
pic = spriteram[offs*2+9];
if (pic & 0x80)
flipx=0;
else
flipx=1;
drawgfx(bitmap,Machine->gfx[1],
(pic & 0x18) >> 3, offs,
flipx,0,sx,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
/* Draw the bombs as 2x2 squares */
for (offs=2; offs<4; offs++)
{
int sx, sy;
sx = 31*8 - spriteram[offs*2+1];
sy = 31*8 - spriteram[offs*2+8];
drawgfx(bitmap,Machine->gfx[2],
0, offs,
0,0,sx,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
}