Merge commit '852f2a6343518919e5ca8d3c1bbcab9f493e3cd8'

external/sdl/SDL/src/video/x11/SDL_x11pen.h

@@ -0,0 +1,54 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2024 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"
+
+#ifndef SDL_x11pen_h_
+#define SDL_x11pen_h_
+
+#ifdef SDL_VIDEO_DRIVER_X11_XINPUT2
+
+#include "SDL_x11video.h"
+#include "../../events/SDL_pen_c.h"
+
+/* Pressure-sensitive pen */
+
+/* Forward definition for SDL_x11video.h */
+struct SDL_VideoData;
+
+/* Function definitions */
+
+/* Detect XINPUT2 devices that are pens / erasers, or update the list after hotplugging */
+extern void X11_InitPen(SDL_VideoDevice *_this);
+
+/* Converts XINPUT2 valuators into pen axis information, including normalisation */
+extern void X11_PenAxesFromValuators(const SDL_Pen *pen,
+                                     const double *input_values, const unsigned char *mask, const int mask_len,
+                                     /* out-mode parameters: */
+                                     float axis_values[SDL_PEN_NUM_AXES]);
+
+/* Map X11 device ID to pen ID */
+extern int X11_PenIDFromDeviceID(int deviceid);
+
+#endif /* SDL_VIDEO_DRIVER_X11_XINPUT2 */
+
+#endif /* SDL_x11pen_h_ */
+
+/* vi: set ts=4 sw=4 expandtab: */