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AmigActive 10
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AACD 10.iso
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vidhrdw
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mainevt.c
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C/C++ Source or Header
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2000-04-20
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4KB
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147 lines
/***************************************************************************
vidhrdw.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "driver.h"
#include "vidhrdw/generic.h"
#include "vidhrdw/konamiic.h"
static int layer_colorbase[3],sprite_colorbase;
/***************************************************************************
Callbacks for the K052109
***************************************************************************/
static void mainevt_tile_callback(int layer,int bank,int *code,int *color)
{
tile_info.flags = (*color & 0x02) ? TILE_FLIPX : 0;
/* priority relative to HALF priority sprites */
if (layer == 2) tile_info.priority = (*color & 0x20) >> 5;
else tile_info.priority = 0;
*code |= ((*color & 0x01) << 8) | ((*color & 0x1c) << 7);
*color = layer_colorbase[layer] + ((*color & 0xc0) >> 6);
}
static void dv_tile_callback(int layer,int bank,int *code,int *color)
{
/* (color & 0x02) is flip y handled internally by the 052109 */
*code |= ((*color & 0x01) << 8) | ((*color & 0x3c) << 7);
*color = layer_colorbase[layer] + ((*color & 0xc0) >> 6);
}
/***************************************************************************
Callbacks for the K051960
***************************************************************************/
static void mainevt_sprite_callback(int *code,int *color,int *priority_mask)
{
/* bit 5 = priority over layer B (has precedence) */
/* bit 6 = HALF priority over layer B (used for crowd when you get out of the ring) */
if (*color & 0x20) *priority_mask = 0xff00;
else if (*color & 0x40) *priority_mask = 0xff00|0xf0f0;
else *priority_mask = 0xff00|0xf0f0|0xcccc;
/* bit 7 is shadow, not used */
*color = sprite_colorbase + (*color & 0x03);
}
static void dv_sprite_callback(int *code,int *color,int *priority)
{
/* TODO: the priority/shadow handling (bits 5-7) seems to be quite complex (see PROM) */
*color = sprite_colorbase + (*color & 0x07);
}
/*****************************************************************************/
int mainevt_vh_start(void)
{
layer_colorbase[0] = 0;
layer_colorbase[1] = 8;
layer_colorbase[2] = 4;
sprite_colorbase = 12;
if (K052109_vh_start(REGION_GFX1,NORMAL_PLANE_ORDER,mainevt_tile_callback))
return 1;
if (K051960_vh_start(REGION_GFX2,NORMAL_PLANE_ORDER,mainevt_sprite_callback))
{
K052109_vh_stop();
return 1;
}
return 0;
}
int dv_vh_start(void)
{
layer_colorbase[0] = 0;
layer_colorbase[1] = 0;
layer_colorbase[2] = 4;
sprite_colorbase = 8;
if (K052109_vh_start(REGION_GFX1,NORMAL_PLANE_ORDER,dv_tile_callback))
return 1;
if (K051960_vh_start(REGION_GFX2,NORMAL_PLANE_ORDER,dv_sprite_callback))
{
K052109_vh_stop();
return 1;
}
return 0;
}
void mainevt_vh_stop(void)
{
K052109_vh_stop();
K051960_vh_stop();
}
/*****************************************************************************/
void mainevt_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
K052109_tilemap_update();
if (palette_recalc())
tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);
tilemap_render(ALL_TILEMAPS);
fillbitmap(priority_bitmap,0,NULL);
K052109_tilemap_draw(bitmap,1,TILEMAP_IGNORE_TRANSPARENCY|(1<<16));
K052109_tilemap_draw(bitmap,2,1|(2<<16)); /* low priority part of layer */
K052109_tilemap_draw(bitmap,2,0|(4<<16)); /* high priority part of layer */
K052109_tilemap_draw(bitmap,0,8<<16);
K051960_sprites_draw(bitmap,-1,-1);
}
void dv_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
K052109_tilemap_update();
if (palette_recalc())
tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);
tilemap_render(ALL_TILEMAPS);
K052109_tilemap_draw(bitmap,1,TILEMAP_IGNORE_TRANSPARENCY);
K052109_tilemap_draw(bitmap,2,0);
K051960_sprites_draw(bitmap,0,0);
K052109_tilemap_draw(bitmap,0,0);
}