Function hsync_handler_pre

src/custom.cpp:5480–5522

this finishes current line

// this finishes current line
static void hsync_handler_pre(bool onvsync)
{
	if (!custom_disabled) {

		/* reset light pen latch */
		if (agnus_vb_active_end_line) {
			lightpen_triggered = 0;
			sprite_0 = 0;
		}

		if (!lightpen_triggered && (bplcon0 & 8)) {
			// lightpen always triggers at the beginning of the last line
			if (agnus_vb_start_line) {
				vpos_lpen = vpos;
				hpos_lpen = 1;
				hhpos_lpen = HHPOSR();
				lightpen_triggered = 1;
			} else if (lightpen_enabled && !agnus_vb_active) {
				int lpnum = inputdevice_get_lightpen_id();
				if (lpnum < 0) {
					lpnum = 0;
				}
				if (lightpen_cx[lpnum] > 0 && lightpen_cy[lpnum] == vpos) {
					event2_newevent_xx(-1, lightpen_cx[lpnum] * CYCLE_UNIT, lightpen_cx[lpnum], lightpen_trigger_func);
				}
			}
		}

		if (GET_PLANES(bplcon0)) {
			notice_resolution_seen(GET_RES_AGNUS(bplcon0), interlace_seen != 0);
		}
	}

	devices_hsync();

	hsync_counter++;

	check_line_enabled();

#ifdef DEBUGGER
	debug_hsync();
#endif
}

// low latency vsync