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AmigActive 10
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vidhrdw
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spy.c
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C/C++ Source or Header
|
2000-01-08
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3KB
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99 lines
#include "driver.h"
#include "vidhrdw/konamiic.h"
static int layer_colorbase[3],sprite_colorbase;
/***************************************************************************
Callbacks for the K052109
***************************************************************************/
static void tile_callback(int layer,int bank,int *code,int *color)
{
tile_info.flags = (*color & 0x20) ? TILE_FLIPX : 0;
*code |= ((*color & 0x03) << 8) | ((*color & 0x10) << 6) | ((*color & 0x0c) << 9)
| (bank << 13);
*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 layer A (0 = have priority) */
/* bit 5 = priority over layer B (1 = have priority) */
*priority = (*color & 0x30) >> 4;
*color = sprite_colorbase + (*color & 0x0f);
}
/***************************************************************************
Start the video hardware emulation.
***************************************************************************/
int spy_vh_start(void)
{
layer_colorbase[0] = 48;
layer_colorbase[1] = 0;
layer_colorbase[2] = 16;
sprite_colorbase = 32;
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;
}
return 0;
}
void spy_vh_stop(void)
{
K052109_vh_stop();
K051960_vh_stop();
}
/***************************************************************************
Display refresh
***************************************************************************/
void spy_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
K052109_tilemap_update();
palette_init_used_colors();
K051960_mark_sprites_colors();
palette_used_colors[16 * layer_colorbase[0]] |= PALETTE_COLOR_VISIBLE;
if (palette_recalc())
tilemap_mark_all_pixels_dirty(ALL_TILEMAPS);
tilemap_render(ALL_TILEMAPS);
fillbitmap(bitmap,Machine->pens[16 * layer_colorbase[0]],&Machine->drv->visible_area);
K051960_sprites_draw(bitmap,1,1); /* are these used? */
K052109_tilemap_draw(bitmap,1,0);
K051960_sprites_draw(bitmap,0,0);
K052109_tilemap_draw(bitmap,2,0);
K051960_sprites_draw(bitmap,3,3); /* are these used? They are supposed to have */
/* priority over layer B but not layer A. */
K051960_sprites_draw(bitmap,2,2);
K052109_tilemap_draw(bitmap,0,0);
}