#include #include #include "emu.h" #include "video/segaic24.h" #include "includes/segas24.h" namespace { struct layer_sort { layer_sort(segas24_mixer *_mixer) { mixer = _mixer; } bool operator()(int l1, int l2) { static const int default_pri[12] = { 0, 1, 2, 3, 4, 5, 6, 7, -4, -3, -2, -1 }; int p1 = mixer->get_reg(l1) & 7; int p2 = mixer->get_reg(l2) & 7; if(p1 != p2) return p1 - p2 < 0; return default_pri[l2] - default_pri[l1] < 0; } segas24_mixer *mixer; }; }; SCREEN_UPDATE(system24) { segas24_state *state = screen->machine().driver_data(); if(state->vmixer->get_reg(13) & 1) { bitmap_fill(bitmap, 0, get_black_pen(screen->machine())); return 0; } bitmap_fill(screen->machine().priority_bitmap, 0, 0); bitmap_fill(bitmap, cliprect, 0); std::vector order; order.resize(12); for(int i=0; i<12; i++) order[i] = i; std::sort(order.begin(), order.end(), layer_sort(state->vmixer)); int spri[4]; int level = 0; for(int i=0; i<12; i++) if(order[i] < 8) state->vtile->draw(bitmap, cliprect, order[i], level, 0); else { spri[order[i]-8] = level; level++; } state->vsprite->draw(bitmap, cliprect, spri); return 0; }