// license:BSD-3-Clause // copyright-holders:Bryan McPhail, Manuel Abadia #include "emu.h" #include "includes/thunderx.h" #include "screen.h" /*************************************************************************** Callbacks for the K052109 ***************************************************************************/ static const int layer_colorbase[] = { 768 / 16, 0 / 16, 256 / 16 }; K052109_CB_MEMBER(thunderx_state::tile_callback) { *code |= ((*color & 0x1f) << 8) | (bank << 13); *color = layer_colorbase[layer] + ((*color & 0xe0) >> 5); } K052109_CB_MEMBER(thunderx_state::gbusters_tile_callback) { /* (color & 0x02) is flip y handled internally by the 052109 */ *code |= ((*color & 0x0d) << 8) | ((*color & 0x10) << 5) | (bank << 12); *color = layer_colorbase[layer] + ((*color & 0xe0) >> 5); } /*************************************************************************** Callbacks for the K051960 ***************************************************************************/ K051960_CB_MEMBER(thunderx_state::sprite_callback) { enum { sprite_colorbase = 512 / 16 }; /* Sprite priority 1 means appear behind background, used only to mask sprites */ /* in the foreground */ /* Sprite priority 3 means don't draw (not used) */ switch (*color & 0x30) { case 0x00: *priority = 0; break; case 0x10: *priority = GFX_PMASK_2 | GFX_PMASK_1; break; case 0x20: *priority = GFX_PMASK_2; break; case 0x30: *priority = 0xffff; break; } *color = sprite_colorbase + (*color & 0x0f); } /*************************************************************************** Start the video hardware emulation. ***************************************************************************/ void thunderx_state::video_start() { m_palette->set_shadow_factor(7.0/8.0); } /*************************************************************************** Display refresh ***************************************************************************/ uint32_t thunderx_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_k052109->tilemap_update(); screen.priority().fill(0, cliprect); /* The background color is always from layer 1 */ m_k052109->tilemap_draw(screen, bitmap, cliprect, 1, TILEMAP_DRAW_OPAQUE, 0); int bg = m_priority ? 2 : 1; int fg = m_priority ? 1 : 2; m_k052109->tilemap_draw(screen, bitmap, cliprect, bg, 0, 1); m_k052109->tilemap_draw(screen, bitmap, cliprect, fg, 0, 2); m_k051960->k051960_sprites_draw(bitmap, cliprect, screen.priority(), -1, -1); m_k052109->tilemap_draw(screen, bitmap, cliprect, 0, 0, 0); return 0; }