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AmigActive 10
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AACD 10.iso
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vidhrdw
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qwakprot.c
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C/C++ Source or Header
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2000-04-04
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/***************************************************************************
vidhrdw.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
static struct rectangle spritevisiblearea =
{
1*8, 31*8-1,
0*8, 30*8-1
};
/***************************************************************************
qwakprot_paletteram_w
This might seem a little odd, but it really seems as though the palette
is writing as GGGRRRBB. This is just a guess, and has not been confirmed.
***************************************************************************/
WRITE_HANDLER( qwakprot_paletteram_w )
{
int bit0,bit1,bit2;
int r,g,b;
paletteram[offset] = data;
/* red component */
bit0 = (~data >> 2) & 0x01;
bit1 = (~data >> 3) & 0x01;
bit2 = (~data >> 4) & 0x01;
r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* green component */
bit0 = (~data >> 5) & 0x01;
bit1 = (~data >> 6) & 0x01;
bit2 = (~data >> 7) & 0x01;
g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
/* blue component */
bit0 = 0;
bit1 = (~data >> 0) & 0x01;
bit2 = (~data >> 1) & 0x01;
b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2;
palette_change_color(offset,r,g,b);
}
/***************************************************************************
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 qwakprot_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
int offs;
if (palette_recalc() || full_refresh)
memset (dirtybuffer, 1, videoram_size);
for (offs = videoram_size - 1;offs >= 0;offs--)
{
if (dirtybuffer[offs])
{
int sx,sy;
int gfxset;
dirtybuffer[offs] = 0;
sx = offs % 32;
sy = offs / 32;
gfxset = ((videoram[offs] & 0x80) >> 7);
drawgfx(bitmap,Machine->gfx[gfxset],
videoram[offs] & 0x7f,
0, /* color */
0,0, /* flipx, flipy */
8*sx,8*sy,
&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
}
}
/* Draw the sprites */
for (offs = 0;offs < 0x10;offs++)
{
int spritenum;
int flip;
int x, y;
int sx, sy;
spritenum = spriteram[offs] & 0x7f;
flip = (spriteram[offs] & 0x80);
x = spriteram[offs + 0x20];
y = 240 - spriteram[offs + 0x10];
drawgfx(bitmap,Machine->gfx[2],
spritenum,0,
0,flip,
x,y,
&spritevisiblearea,TRANSPARENCY_PEN,0);
/* mark tiles underneath as dirty */
sx = x >> 3;
sy = y >> 3;
{
int max_x = 1;
int max_y = 2;
int x2, y2;
if (x & 0x07) max_x ++;
if (y & 0x0f) max_y ++;
for (y2 = sy; y2 < sy + max_y; y2 ++)
{
for (x2 = sx; x2 < sx + max_x; x2 ++)
{
if ((x2 < 32) && (y2 < 30) && (x2 >= 0) && (y2 >= 0))
dirtybuffer[x2 + 32*y2] = 1;
}
}
}
}
}