From 5a079a2d114f96d4847d1ee305d5b7c16eeec50e Mon Sep 17 00:00:00 2001
From: 3gg <3gg@shellblade.net>
Date: Sat, 27 Dec 2025 12:03:39 -0800
Subject: Initial commit

---
 contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c | 86 ++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c

(limited to 'contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c')

diff --git a/contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c b/contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c
new file mode 100644
index 0000000..8116e4a
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/n3ds/SDL_n3dstouch.c
@@ -0,0 +1,86 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "SDL_internal.h"
+
+#ifdef SDL_VIDEO_DRIVER_N3DS
+
+#include <3ds.h>
+
+#include "../../events/SDL_touch_c.h"
+#include "../SDL_sysvideo.h"
+#include "SDL_n3dstouch.h"
+#include "SDL_n3dsvideo.h"
+
+#define N3DS_TOUCH_ID 1
+#define N3DS_TOUCH_FINGER 1
+
+/*
+  Factors used to convert touchscreen coordinates to
+  SDL's 0-1 values. Note that the N3DS's screen is
+  internally in a portrait disposition so the
+  GSP_SCREEN constants are flipped.
+*/
+#define TOUCHSCREEN_SCALE_X 1.0f / (GSP_SCREEN_HEIGHT_BOTTOM - 1)
+#define TOUCHSCREEN_SCALE_Y 1.0f / (GSP_SCREEN_WIDTH - 1)
+
+void N3DS_InitTouch(void)
+{
+    SDL_AddTouch(N3DS_TOUCH_ID, SDL_TOUCH_DEVICE_DIRECT, "Touchscreen");
+}
+
+void N3DS_QuitTouch(void)
+{
+    SDL_DelTouch(N3DS_TOUCH_ID);
+}
+
+void N3DS_PollTouch(SDL_VideoDevice *_this)
+{
+    SDL_VideoData *internal = (SDL_VideoData *)_this->internal;
+    touchPosition touch;
+    SDL_Window *window;
+    SDL_VideoDisplay *display;
+    static bool was_pressed = false;
+    bool pressed;
+    hidTouchRead(&touch);
+    pressed = (touch.px != 0 || touch.py != 0);
+
+    display = SDL_GetVideoDisplay(internal->touch_display);
+    window = display ? display->fullscreen_window : NULL;
+
+    if (pressed != was_pressed) {
+        was_pressed = pressed;
+        SDL_SendTouch(0, N3DS_TOUCH_ID, N3DS_TOUCH_FINGER,
+                      window,
+                      pressed ? SDL_EVENT_FINGER_DOWN : SDL_EVENT_FINGER_UP,
+                      touch.px * TOUCHSCREEN_SCALE_X,
+                      touch.py * TOUCHSCREEN_SCALE_Y,
+                      pressed ? 1.0f : 0.0f);
+    } else if (pressed) {
+        SDL_SendTouchMotion(0, N3DS_TOUCH_ID, N3DS_TOUCH_FINGER,
+                            window,
+                            touch.px * TOUCHSCREEN_SCALE_X,
+                            touch.py * TOUCHSCREEN_SCALE_Y,
+                            1.0f);
+    }
+}
+
+#endif // SDL_VIDEO_DRIVER_N3DS
-- 
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