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bios/Arcade/MAME/plugins/layout/init.lua

@@ -0,0 +1,86 @@
+-- license:BSD-3-Clause
+-- copyright-holders:Carl
+-- Layout scripts should return a table and a string.  The table can have two optional keys reset and frame
+-- which have functions for values called on reset and frame draw respectively and the string is a unique name.
+local exports = {
+	name = "layout",
+	version = "0.0.1",
+	description = "Layout helper plugin",
+	license = "BSD-3-Clause",
+	author = { name = "Carl" } }
+
+local layout = exports
+
+local frame_subscription, stop_subscription
+
+function layout.startplugin()
+	local scripts = {}
+	local function prepare_layout(file, script)
+		local env = {
+			machine = manager.machine,
+			emu = {
+				device_enumerator = emu.device_enumerator,
+				palette_enumerator = emu.palette_enumerator,
+				screen_enumerator = emu.screen_enumerator,
+				cassette_enumerator = emu.cassette_enumerator,
+				image_enumerator = emu.image_enumerator,
+				slot_enumerator = emu.slot_enumerator,
+				attotime = emu.attotime,
+				render_bounds = emu.render_bounds,
+				render_color = emu.render_color,
+				bitmap_ind8 = emu.bitmap_ind8,
+				bitmap_ind16 = emu.bitmap_ind16,
+				bitmap_ind32 = emu.bitmap_ind32,
+				bitmap_ind64 = emu.bitmap_ind64,
+				bitmap_yuy16 = emu.bitmap_yuy16,
+				bitmap_rgb32 = emu.bitmap_rgb32,
+				bitmap_argb32 = emu.bitmap_argb32,
+				print_verbose = emu.print_verbose,
+				print_error = emu.print_error,
+				print_warning = emu.print_warning,
+				print_info = emu.print_info,
+				print_debug = emu.print_debug },
+			file = file,
+			math = math,
+			print = print,
+			pairs = pairs,
+			ipairs = ipairs,
+			string = string,
+			tonumber = tonumber,
+			tostring = tostring,
+			table = table }
+		local script, err = load(script, script, "t", env)
+		if not script then
+			emu.print_warning("error loading layout script " .. err)
+			return
+		end
+		local hooks = script()
+		if hooks ~= nil then
+			table.insert(scripts, hooks)
+		end
+	end
+
+	emu.register_callback(prepare_layout, "layout")
+	frame_subscription = emu.add_machine_frame_notifier(function ()
+		if manager.machine.paused then
+			return
+		end
+		for num, scr in pairs(scripts) do
+			if scr.frame then
+				scr.frame()
+			end
+		end
+	end)
+	emu.register_prestart(function ()
+		for num, scr in pairs(scripts) do
+			if scr.reset then
+				scr.reset()
+			end
+		end
+	end)
+	stop_subscription = emu.add_machine_stop_notifier(function ()
+		scripts = {}
+	end)
+end
+
+return exports