/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int pbaction_vh_start(void)
{
int i;
if (generic_vh_start() != 0)
return 1;
if ((dirtybuffer2 = malloc(videoram_size)) == 0)
{
generic_vh_stop();
return 1;
}
memset(dirtybuffer2,1,videoram_size);
if ((tmpbitmap2 = osd_create_bitmap(Machine->drv->screen_width,Machine->drv->screen_height)) == 0)
{
free(dirtybuffer2);
generic_vh_stop();
return 1;
}
/* leave everything at the default, but map all foreground 0 pens as transparent */
for (i = 0;i < 16;i++) palette_used_colors[8 * i] = PALETTE_COLOR_TRANSPARENT;
return 0;
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int invaders_vh_start (void)
{
if ((tmpbitmap = osd_create_bitmap(Machine->drv->screen_width,Machine->drv->screen_height)) == 0)
return 1;
return 0;
}
int vigilant_vh_start(void)
{
generic_vh_start();
if ((bg_bitmap = osd_create_bitmap(512*3,256)) == 0)
{
generic_vh_stop();
return 1;
}
return 0;
}
int exidy_vh_start(void)
{
exidy_collision_counter = 0;
if (generic_vh_start()!=0)
return 1;
if ((motion_object_1_vid = osd_create_bitmap(16,16)) == 0)
{
generic_vh_stop();
return 1;
}
if ((motion_object_2_vid = osd_create_bitmap(16,16)) == 0)
{
osd_free_bitmap(motion_object_1_vid);
generic_vh_stop();
return 1;
}
return 0;
}
int sprint2_vh_start(void)
{
if (generic_vh_start()!=0)
return 1;
if ((back_vid = osd_create_bitmap(16,8)) == 0)
{
generic_vh_stop();
return 1;
}
if ((grey_cars_vid = osd_create_bitmap(16,8)) == 0)
{
osd_free_bitmap(back_vid);
generic_vh_stop();
return 1;
}
if ((black_car_vid = osd_create_bitmap(16,8)) == 0)
{
osd_free_bitmap(back_vid);
osd_free_bitmap(grey_cars_vid);
generic_vh_stop();
return 1;
}
if ((white_car_vid = osd_create_bitmap(16,8)) == 0)
{
osd_free_bitmap(back_vid);
osd_free_bitmap(grey_cars_vid);
osd_free_bitmap(black_car_vid);
generic_vh_stop();
return 1;
}
return 0;
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int spiders_vh_start(void)
{
int loop;
if ((tmpbitmap = osd_create_bitmap(Machine->drv->screen_width,Machine->drv->screen_height)) == 0) return 1;
for(loop=0;loop<256;loop++)
{
bitflip[loop]=(loop&0x01)?0x80:0x00;
bitflip[loop]|=(loop&0x02)?0x40:0x00;
bitflip[loop]|=(loop&0x04)?0x20:0x00;
bitflip[loop]|=(loop&0x08)?0x10:0x00;
bitflip[loop]|=(loop&0x10)?0x08:0x00;
bitflip[loop]|=(loop&0x20)?0x04:0x00;
bitflip[loop]|=(loop&0x40)?0x02:0x00;
bitflip[loop]|=(loop&0x80)?0x01:0x00;
}
if ((screenbuffer = (int *)gp2x_malloc(SCREENBUFFER_SIZE*sizeof(int))) == 0) return 1;
fast_memset(screenbuffer,1,SCREENBUFFER_SIZE*sizeof(int));
return 0;
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int tnzs_vh_start(void)
{
int column,x,y;
for (column=0;column<16;column++)
{
if ((tnzs_column[column] = osd_create_bitmap(32,256)) == 0)
{
/* Free all the columns */
for (column--;column;column--)
osd_free_bitmap(tnzs_column[column]);
return 1;
}
}
for (x=0;x<32;x++)
{
for (y=0;y<16;y++)
{
tnzs_dirty_map[x][y] = -1;
}
}
return 0;
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int congo_vh_start(void)
{
int offs;
int sx,sy;
struct osd_bitmap *prebitmap;
if (generic_vh_start() != 0)
return 1;
/* large bitmap for the precalculated background */
if ((backgroundbitmap = osd_create_bitmap(512,2303+32)) == 0)
{
generic_vh_stop();
return 1;
}
/* create a temporary bitmap to prepare the background before converting it */
if ((prebitmap = osd_create_bitmap(4096,256)) == 0)
{
osd_free_bitmap(backgroundbitmap);
generic_vh_stop();
return 1;
}
/* prepare the background */
for (offs = 0;offs < 0x4000;offs++)
{
sx = 8 * (511 - offs / 32);
sy = 8 * (offs % 32);
drawgfx(prebitmap,Machine->gfx[2],
Machine->memory_region[2][offs] + 256 * (Machine->memory_region[2][0x4000 + offs] & 3),
Machine->memory_region[2][0x4000 + offs] >> 4,
0,0,
sx,sy,
0,TRANSPARENCY_NONE,0);
}
/* the background is stored as a rectangle, but is drawn by the hardware skewed: */
/* go right two pixels, then up one pixel. Doing the conversion at run time would */
/* be extremely expensive, so we do it now. To save memory, we squash the image */
/* horizontally (doing line shifts at run time is much less expensive than doing */
/* column shifts) */
for (offs = -510;offs < 4096;offs += 2)
{
sy = (2302-510/2) - offs/2;
for (sx = 0;sx < 512;sx += 2)
{
if (offs + sx < 0 || offs + sx >= 4096)
{
backgroundbitmap->line[sy][sx] = Machine->background_pen;
backgroundbitmap->line[sy][sx+1] = Machine->background_pen;
}
else
{
backgroundbitmap->line[sy][sx] = prebitmap->line[sx/2][offs + sx];
backgroundbitmap->line[sy][sx+1] = prebitmap->line[sx/2][offs + sx+1];
}
}
}
osd_free_bitmap(prebitmap);
/* free the graphics ROMs, they are no longer needed */
free(Machine->memory_region[2]);
Machine->memory_region[2] = 0;
return 0;
}
