From 1fb111c2bbb8f81ee5cfd250508ff13adeaa534b Mon Sep 17 00:00:00 2001
From: AreaScout <d.mehrwald@gmail.com>
Date: Fri, 7 Sep 2018 10:44:41 +0000
Subject: [PATCH] Add: Touchscreen event support for SDL2

---
 SDL/SDLMain.cpp | 68 ++++++++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 67 insertions(+), 1 deletion(-)

diff --git a/SDL/SDLMain.cpp b/SDL/SDLMain.cpp
index d28f21936e77..14afdd040cbd 100644
--- a/SDL/SDLMain.cpp
+++ b/SDL/SDLMain.cpp
@@ -355,6 +355,7 @@ int main(int argc, char *argv[]) {
 
 	int set_xres = -1;
 	int set_yres = -1;
+	int w = 0, h = 0;
 	bool portrait = false;
 	bool set_ipad = false;
 	float set_dpi = 1.0f;
@@ -601,7 +602,7 @@ int main(int argc, char *argv[]) {
 
 	while (true) {
 		double startTime = time_now_d();
-		SDL_Event event;
+		SDL_Event event, touchEvent;
 		while (SDL_PollEvent(&event)) {
 			float mx = event.motion.x * g_dpi_scale_x;
 			float my = event.motion.y * g_dpi_scale_y;
@@ -681,6 +682,71 @@ int main(int argc, char *argv[]) {
 					NativeKey(key);
 					break;
 				}
+			case SDL_FINGERMOTION:
+				{
+					if (!g_Config.bFullScreen) { break; }
+					SDL_GetWindowSize(window, &w, &h);
+					touchEvent.type = SDL_MOUSEMOTION;
+					touchEvent.motion.type = SDL_MOUSEMOTION;
+					touchEvent.motion.timestamp = event.tfinger.timestamp;
+					touchEvent.motion.windowID = SDL_GetWindowID(window);
+					touchEvent.motion.which = SDL_TOUCH_MOUSEID;
+					touchEvent.motion.state = SDL_GetMouseState(NULL, NULL);
+					touchEvent.motion.x = event.tfinger.x * w;
+					touchEvent.motion.y = event.tfinger.y * h;
+
+					SDL_WarpMouseInWindow(window, event.tfinger.x * w, event.tfinger.y * h);
+
+					SDL_PushEvent(&touchEvent);
+					break;
+				}
+			case SDL_FINGERDOWN:
+				{
+					if (!g_Config.bFullScreen) { break; }
+					SDL_GetWindowSize(window, &w, &h);
+					touchEvent.type = SDL_MOUSEBUTTONDOWN;
+					touchEvent.button.type = SDL_MOUSEBUTTONDOWN;
+					touchEvent.button.timestamp = SDL_GetTicks();
+					touchEvent.button.windowID = SDL_GetWindowID(window);
+					touchEvent.button.which = SDL_TOUCH_MOUSEID;
+					touchEvent.button.button = SDL_BUTTON_LEFT;
+					touchEvent.button.state = SDL_PRESSED;
+					touchEvent.button.clicks = 1;
+					touchEvent.button.x = event.tfinger.x * w;
+					touchEvent.button.y = event.tfinger.y * h;
+
+					touchEvent.motion.type = SDL_MOUSEMOTION;
+					touchEvent.motion.timestamp = SDL_GetTicks();
+					touchEvent.motion.windowID = SDL_GetWindowID(window);
+					touchEvent.motion.which = SDL_TOUCH_MOUSEID;
+					touchEvent.motion.x = event.tfinger.x * w;
+					touchEvent.motion.y = event.tfinger.y * h;
+					// Any real mouse cursor should also move
+					SDL_WarpMouseInWindow(window, event.tfinger.x * w, event.tfinger.y * h);
+					// First finger down event also has to be a motion to that position
+					SDL_PushEvent(&touchEvent);
+					touchEvent.motion.type = SDL_MOUSEBUTTONDOWN;
+					// Now we push the mouse button event
+					SDL_PushEvent(&touchEvent);
+					break;
+				}
+			case SDL_FINGERUP:
+				{
+					if(!g_Config.bFullScreen) { break; }
+					SDL_GetWindowSize(window, &w, &h);
+					touchEvent.type = SDL_MOUSEBUTTONUP;
+					touchEvent.button.type = SDL_MOUSEBUTTONUP;
+					touchEvent.button.timestamp = SDL_GetTicks();
+					touchEvent.button.windowID = SDL_GetWindowID(window);
+					touchEvent.button.which = SDL_TOUCH_MOUSEID;
+					touchEvent.button.button = SDL_BUTTON_LEFT;
+					touchEvent.button.state = SDL_RELEASED;
+					touchEvent.button.clicks = 1;
+					touchEvent.button.x = event.tfinger.x * w;
+					touchEvent.button.y = event.tfinger.y * h;
+					SDL_PushEvent(&touchEvent);
+					break;
+				}
 			case SDL_MOUSEBUTTONDOWN:
 				switch (event.button.button) {
 				case SDL_BUTTON_LEFT: