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AmigActive 10
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AACD 10.iso
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AACD
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MAME
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src
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vidhrdw
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flstory.c
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C/C++ Source or Header
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2000-04-23
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3KB
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148 lines
/***************************************************************************
vidhrdw.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
static int palette_bank;
void flstory_vh_convert_color_prom(unsigned char *palette, unsigned short *colortable,const unsigned char *color_prom)
{
int i;
/* no color PROMs here, only RAM, but the gfx data is inverted so we */
/* cannot use the default lookup table */
for (i = 0;i < Machine->drv->color_table_len;i++)
colortable[i] = i ^ 0x0f;
}
int flstory_vh_start(void)
{
paletteram = malloc(0x200);
paletteram_2 = malloc(0x200);
return generic_vh_start();
}
void flstory_vh_stop(void)
{
free(paletteram);
paletteram = 0;
free(paletteram_2);
paletteram_2 = 0;
generic_vh_stop();
}
WRITE_HANDLER( flstory_palette_w )
{
if (offset & 0x100)
paletteram_xxxxBBBBGGGGRRRR_split2_w((offset & 0xff) + (palette_bank << 8),data);
else
paletteram_xxxxBBBBGGGGRRRR_split1_w((offset & 0xff) + (palette_bank << 8),data);
}
WRITE_HANDLER( flstory_gfxctrl_w )
{
palette_bank = (data & 0x20) >> 5;
//logerror("%04x: gfxctrl = %02x\n",cpu_get_pc(),data);
}
/***************************************************************************
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 flstory_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
int offs;
if (palette_recalc())
memset(dirtybuffer,1,videoram_size);
for (offs = videoram_size - 2;offs >= 0;offs -= 2)
{
if (dirtybuffer[offs] || dirtybuffer[offs+1])
{
int sx,sy;
dirtybuffer[offs] = 0;
dirtybuffer[offs+1] = 0;
sx = (offs/2)%32;
sy = (offs/2)/32;
drawgfx(tmpbitmap,Machine->gfx[0],
videoram[offs] + ((videoram[offs + 1] & 0xc0) << 2) + 0xc00,
videoram[offs + 1] & 0x07,
videoram[offs + 1] & 0x08,1,
8*sx,8*sy,
&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
}
}
copybitmap(bitmap,tmpbitmap,0,0,0,0,&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
for (offs = 0;offs < spriteram_size;offs += 4)
{
int code,sx,sy,flipx,flipy;
code = spriteram[offs+2] + ((spriteram[offs+1] & 0x30) << 4);
sx = spriteram[offs+3];
sy = 240 - spriteram[offs+0];
flipx = spriteram[offs+1]&0x40;
flipy = spriteram[offs+1]&0x80;
drawgfx(bitmap,Machine->gfx[1],
code,
spriteram[offs+1] & 0x0f,
flipx,flipy,
sx,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
/* wrap around */
if (sx > 240)
drawgfx(bitmap,Machine->gfx[1],
code,
spriteram[offs+1] & 0x0f,
flipx,flipy,
sx-256,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
/* redraw chars with priority over sprites */
for (offs = videoram_size - 2;offs >= 0;offs -= 2)
{
if (videoram[offs + 1] & 0x20)
{
int sx,sy;
sx = (offs/2)%32;
sy = (offs/2)/32;
drawgfx(bitmap,Machine->gfx[0],
videoram[offs] + ((videoram[offs + 1] & 0xc0) << 2) + 0xc00,
videoram[offs + 1] & 0x07,
videoram[offs + 1] & 0x08,1,
8*sx,8*sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
}
}