hh_sm510: add preset for triple screen games

Author: happppp

src/mame/handheld/hh_sm510.cpp

@@ -155,6 +155,7 @@ The MCUs used were not imported from Sharp, but cloned by USSR, renamed to
 #include "hh_sm510_single.lh"
 #include "hh_sm510_dualv.lh"
 #include "hh_sm510_dualh.lh"
+#include "hh_sm510_tripleh.lh"
 
 //#include "hh_sm510_test.lh" // common test-layout - use external artwork
 #include "hh_sm500_test.lh" // "
@@ -494,6 +495,17 @@ void hh_sm510_state::sm510_dualh(machine_config &config, u16 leftwidth, u16 left
 	config.set_default_layout(layout_hh_sm510_dualh);
 }
 
+void hh_sm510_state::sm510_tripleh(machine_config &config, u16 leftwidth, u16 leftheight, u16 middlewidth, u16 middleheight, u16 rightwidth, u16 rightheight)
+{
+	mcfg_cpu_sm510(config);
+	mcfg_sound_r1(config);
+	mcfg_svg_screen(config, leftwidth, leftheight, "screen_left");
+	mcfg_svg_screen(config, middlewidth, middleheight, "screen_middle");
+	mcfg_svg_screen(config, rightwidth, rightheight, "screen_right");
+
+	config.set_default_layout(layout_hh_sm510_tripleh);
+}
+
 void hh_sm510_state::dualv_common(machine_config &config, u16 topwidth, u16 topheight, u16 botwidth, u16 botheight)
 {
 	mcfg_sound_r1(config);

src/mame/handheld/hh_sm510.h

@@ -103,6 +103,7 @@ class hh_sm510_state : public driver_device
 	void sm530_common(machine_config &config, u16 width, u16 height);
 
 	void sm510_dualh(machine_config &config, u16 leftwidth, u16 leftheight, u16 rightwidth, u16 rightheight);
+	[[maybe_unused]] void sm510_tripleh(machine_config &config, u16 leftwidth, u16 leftheight, u16 middlewidth, u16 middleheight, u16 rightwidth, u16 rightheight);
 	void dualv_common(machine_config &config, u16 topwidth, u16 topheight, u16 botwidth, u16 botheight);
 	void sm510_dualv(machine_config &config, u16 topwidth, u16 topheight, u16 botwidth, u16 botheight);
 	void sm511_dualv(machine_config &config, u16 topwidth, u16 topheight, u16 botwidth, u16 botheight);

src/mame/layout/hh_sm510_tripleh.lay

@@ -0,0 +1,35 @@
+<?xml version="1.0"?>
+<!--
+license:CC0-1.0
+authors:hap
+-->
+<mamelayout version="2">
+
+	<element name="lcdm"><rect><color red="0.7" green="0.71" blue="0.72" /></rect></element>
+
+	<view name="LCD 0 Pixel Aspect (~scr0nativexaspect~:~scr0nativeyaspect~)">
+		<screen index="0"><bounds left="0" top="0" right="~scr0width~" bottom="~scr0height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds left="0" top="0" right="~scr0width~" bottom="~scr0height~" /></element>
+	</view>
+
+	<view name="LCD 1 Pixel Aspect (~scr1nativexaspect~:~scr1nativeyaspect~)">
+		<screen index="1"><bounds left="0" top="0" right="~scr1width~" bottom="~scr1height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds left="0" top="0" right="~scr1width~" bottom="~scr1height~" /></element>
+	</view>
+
+	<view name="LCD 2 Pixel Aspect (~scr2nativexaspect~:~scr2nativeyaspect~)">
+		<screen index="1"><bounds left="0" top="0" right="~scr2width~" bottom="~scr2height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds left="0" top="0" right="~scr2width~" bottom="~scr2height~" /></element>
+	</view>
+
+	<!-- can't do a view with gaps -->
+	<view name="LCD Triple Side-by-Side (Gapless)">
+		<screen index="0"><bounds x="-~scr0width~" y="0" width="~scr0width~" height="~scr0height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds x="-~scr0width~" y="0" width="~scr0width~" height="~scr0height~" /></element>
+		<screen index="1"><bounds x="0" y="0" width="~scr1width~" height="~scr1height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds x="0" y="0" width="~scr1width~" height="~scr1height~" /></element>
+		<screen index="2"><bounds x="~scr1width~" y="0" width="~scr2width~" height="~scr2height~" /></screen>
+		<element ref="lcdm" blend="multiply"><bounds x="~scr1width~" y="0" width="~scr2width~" height="~scr2height~" /></element>
+	</view>
+
+</mamelayout>