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AmigActive 10
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vidhrdw
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bottom9.c
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C/C++ Source or Header
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2000-03-29
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3KB
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132 lines
#include "driver.h"
#include "vidhrdw/konamiic.h"
int bottom9_video_enable;
static int layer_colorbase[3],sprite_colorbase,zoom_colorbase;
/***************************************************************************
Callbacks for the K052109
***************************************************************************/
static void tile_callback(int layer,int bank,int *code,int *color)
{
*code |= (*color & 0x3f) << 8;
*color = layer_colorbase[layer] + ((*color & 0xc0) >> 6);
}
/***************************************************************************
Callbacks for the K051960
***************************************************************************/
static void sprite_callback(int *code,int *color,int *priority)
{
/* bit 4 = priority over zoom (0 = have priority) */
/* bit 5 = priority over B (1 = have priority) */
*priority = (*color & 0x30) >> 4;
*color = sprite_colorbase + (*color & 0x0f);
}
/***************************************************************************
Callbacks for the K051316
***************************************************************************/
static void zoom_callback(int *code,int *color)
{
tile_info.flags = (*color & 0x40) ? TILE_FLIPX : 0;
*code |= ((*color & 0x03) << 8);
*color = zoom_colorbase + ((*color & 0x3c) >> 2);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int bottom9_vh_start(void)
{
layer_colorbase[0] = 0; /* not used */
layer_colorbase[1] = 0;
layer_colorbase[2] = 16;
sprite_colorbase = 32;
zoom_colorbase = 48;
if (K052109_vh_start(REGION_GFX1,NORMAL_PLANE_ORDER,tile_callback))
{
return 1;
}
if (K051960_vh_start(REGION_GFX2,NORMAL_PLANE_ORDER,sprite_callback))
{
K052109_vh_stop();
return 1;
}
if (K051316_vh_start_0(REGION_GFX3,4,zoom_callback))
{
K052109_vh_stop();
K051960_vh_stop();
return 1;
}
return 0;
}
void bottom9_vh_stop(void)
{
K052109_vh_stop();
K051960_vh_stop();
K051316_vh_stop_0();
}
/***************************************************************************
Display refresh
***************************************************************************/
void bottom9_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
int i;
K052109_tilemap_update();
K051316_tilemap_update_0();
palette_init_used_colors();
K051960_mark_sprites_colors();
/* set back pen for the zoom layer */
for (i = 0;i < 16;i++)
palette_used_colors[(zoom_colorbase + i) * 16] = PALETTE_COLOR_TRANSPARENT;
if (palette_recalc())
tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);
tilemap_render(ALL_TILEMAPS);
/* note: FIX layer is not used */
fillbitmap(bitmap,Machine->pens[layer_colorbase[1]],&Machine->drv->visible_area);
// if (bottom9_video_enable)
{
K051960_sprites_draw(bitmap,1,1);
K051316_zoom_draw_0(bitmap,0);
K051960_sprites_draw(bitmap,0,0);
K052109_tilemap_draw(bitmap,2,0);
/* note that priority 3 is opposite to the basic layer priority! */
/* (it IS used, but hopefully has no effect) */
K051960_sprites_draw(bitmap,2,3);
K052109_tilemap_draw(bitmap,1,0);
}
}