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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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solomon.c
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C/C++ Source or Header
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2000-04-04
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4KB
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203 lines
#include "driver.h"
#include "vidhrdw/generic.h"
unsigned char *solomon_bgvideoram;
unsigned char *solomon_bgcolorram;
static struct osd_bitmap *tmpbitmap2;
static unsigned char *dirtybuffer2;
static int flipscreen;
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int solomon_vh_start(void)
{
int i;
if (generic_vh_start() != 0)
return 1;
if ((tmpbitmap2 = osd_create_bitmap(Machine->drv->screen_width,Machine->drv->screen_height)) == 0)
{
generic_vh_stop();
return 1;
}
if ((dirtybuffer2 = malloc(videoram_size)) == 0)
{
osd_free_bitmap(tmpbitmap2);
generic_vh_stop();
return 1;
}
memset(dirtybuffer2,1,videoram_size);
/* leave everything at the default, but map all foreground 0 pens as transparent */
for (i = 0;i < 8;i++) palette_used_colors[16 * i] = PALETTE_COLOR_TRANSPARENT;
return 0;
}
/***************************************************************************
Stop the video hardware emulation.
***************************************************************************/
void solomon_vh_stop(void)
{
osd_free_bitmap(tmpbitmap2);
free(dirtybuffer2);
generic_vh_stop();
}
WRITE_HANDLER( solomon_bgvideoram_w )
{
if (solomon_bgvideoram[offset] != data)
{
dirtybuffer2[offset] = 1;
solomon_bgvideoram[offset] = data;
}
}
WRITE_HANDLER( solomon_bgcolorram_w )
{
if (solomon_bgcolorram[offset] != data)
{
dirtybuffer2[offset] = 1;
solomon_bgcolorram[offset] = data;
}
}
WRITE_HANDLER( solomon_flipscreen_w )
{
if (flipscreen != (data & 1))
{
flipscreen = data & 1;
memset(dirtybuffer,1,videoram_size);
memset(dirtybuffer2,1,videoram_size);
}
}
/***************************************************************************
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 solomon_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
int offs;
/* recalc the palette if necessary */
if (palette_recalc())
{
memset(dirtybuffer,1,videoram_size);
memset(dirtybuffer2,1,videoram_size);
}
for (offs = 0;offs < videoram_size;offs++)
{
if (dirtybuffer2[offs])
{
int sx,sy,flipx,flipy;
dirtybuffer2[offs] = 0;
sx = offs % 32;
sy = offs / 32;
flipx = solomon_bgcolorram[offs] & 0x80;
flipy = solomon_bgcolorram[offs] & 0x08;
if (flipscreen)
{
sx = 31 - sx;
sy = 31 - sy;
flipx = !flipx;
flipy = !flipy;
}
drawgfx(tmpbitmap2,Machine->gfx[1],
solomon_bgvideoram[offs] + 256 * (solomon_bgcolorram[offs] & 0x07),
((solomon_bgcolorram[offs] & 0x70) >> 4),
flipx,flipy,
8*sx,8*sy,
0,TRANSPARENCY_NONE,0);
}
}
/* copy the character mapped graphics */
copybitmap(bitmap,tmpbitmap2,0,0,0,0,&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
/* draw the frontmost playfield */
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)
{
sx = 31 - sx;
sy = 31 - sy;
}
drawgfx(tmpbitmap,Machine->gfx[0],
videoram[offs] + 256 * (colorram[offs] & 0x07),
(colorram[offs] & 0x70) >> 4,
flipscreen,flipscreen,
8*sx,8*sy,
&Machine->drv->visible_area,TRANSPARENCY_NONE,0);
}
}
copybitmap(bitmap,tmpbitmap,0,0,0,0,&Machine->drv->visible_area,TRANSPARENCY_PEN,palette_transparent_pen);
/* draw sprites */
for (offs = spriteram_size - 4;offs >= 0;offs -= 4)
{
int sx,sy,flipx,flipy;
sx = spriteram[offs+3];
sy = 241-spriteram[offs+2];
flipx = spriteram[offs+1] & 0x40;
flipy = spriteram[offs+1] & 0x80;
if (flipscreen & 1)
{
sx = 240 - sx;
sy = 240 - sy;
flipx = !flipx;
flipy = !flipy;
}
drawgfx(bitmap,Machine->gfx[2],
spriteram[offs] + 16*(spriteram[offs+1] & 0x10),
(spriteram[offs + 1] & 0x0e) >> 1,
flipx,flipy,
sx,sy,
&Machine->drv->visible_area,TRANSPARENCY_PEN,0);
}
}