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@@ -0,0 +1,84 @@
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+/*
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+ Simple DirectMedia Layer
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+ Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
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+
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+ This software is provided 'as-is', without any express or implied
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+ warranty. In no event will the authors be held liable for any damages
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+ arising from the use of this software.
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+
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+ Permission is granted to anyone to use this software for any purpose,
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+ including commercial applications, and to alter it and redistribute it
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+ freely, subject to the following restrictions:
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+
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+ 1. The origin of this software must not be misrepresented; you must not
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+ claim that you wrote the original software. If you use this software
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+ in a product, an acknowledgment in the product documentation would be
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+ appreciated but is not required.
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+ 2. Altered source versions must be plainly marked as such, and must not be
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+ misrepresented as being the original software.
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+ 3. This notice may not be removed or altered from any source distribution.
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+*/
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+
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+#include "../../SDL_internal.h"
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+
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+#ifdef SDL_VIDEO_DRIVER_N3DS
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+
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+#include <3ds.h>
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+
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+#include "../../events/SDL_touch_c.h"
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+#include "SDL_n3dstouch.h"
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+
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+#define N3DS_TOUCH_ID 0
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+
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+/*
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+ Factors used to convert touchscreen coordinates to
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+ SDL's 0-1 values. Note that the N3DS's screen is
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+ internally in a portrait disposition so the
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+ GSP_SCREEN constants are flipped.
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+*/
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+#define TOUCHSCREEN_SCALE_X 1.0f / GSP_SCREEN_HEIGHT_BOTTOM
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+#define TOUCHSCREEN_SCALE_Y 1.0f / GSP_SCREEN_WIDTH
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+
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+void
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+N3DS_InitTouch(void)
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+{
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+ SDL_AddTouch(N3DS_TOUCH_ID, SDL_TOUCH_DEVICE_DIRECT, "Touchscreen");
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+}
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+
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+void
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+N3DS_QuitTouch(void)
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+{
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+ SDL_DelTouch(N3DS_TOUCH_ID);
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+}
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+
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+void
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+N3DS_PollTouch(void)
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+{
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+ touchPosition touch;
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+ static SDL_bool was_pressed = SDL_FALSE;
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+ SDL_bool pressed;
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+ hidTouchRead(&touch);
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+ pressed = (touch.px != 0 || touch.py != 0);
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+
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+ if (pressed != was_pressed) {
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+ was_pressed = pressed;
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+ SDL_SendTouch(N3DS_TOUCH_ID,
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+ 0,
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+ NULL,
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+ pressed,
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+ touch.px * TOUCHSCREEN_SCALE_X,
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+ touch.py * TOUCHSCREEN_SCALE_Y,
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+ pressed ? 1.0f : 0.0f);
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+ } else if (pressed) {
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+ SDL_SendTouchMotion(N3DS_TOUCH_ID,
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+ 0,
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+ NULL,
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+ touch.px * TOUCHSCREEN_SCALE_X,
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+ touch.py * TOUCHSCREEN_SCALE_Y,
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+ 1.0f);
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+ }
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+}
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+
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+#endif /* SDL_VIDEO_DRIVER_N3DS */
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+
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+/* vi: set sts=4 ts=4 sw=4 expandtab: */
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Pierre Wendling