Fuck git

2026-03-23 12:11:07 +01:00
commit e64eb40b38
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+/*
+  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_COCOA
+
+#include "SDL_cocoapen.h"
+#include "SDL_cocoavideo.h"
+
+#include "../../events/SDL_pen_c.h"
+
+bool Cocoa_InitPen(SDL_VideoDevice *_this)
+{
+    return true;
+}
+
+typedef struct Cocoa_PenHandle
+{
+    NSUInteger deviceid;
+    NSUInteger toolid;
+    SDL_PenID pen;
+    bool is_eraser;
+} Cocoa_PenHandle;
+
+typedef struct FindPenByDeviceAndToolIDData
+{
+    NSUInteger deviceid;
+    NSUInteger toolid;
+    void *handle;
+} FindPenByDeviceAndToolIDData;
+
+static bool FindPenByDeviceAndToolID(void *handle, void *userdata)
+{
+    const Cocoa_PenHandle *cocoa_handle = (const Cocoa_PenHandle *) handle;
+    FindPenByDeviceAndToolIDData *data = (FindPenByDeviceAndToolIDData *) userdata;
+
+    if (cocoa_handle->deviceid != data->deviceid) {
+        return false;
+    } else if (cocoa_handle->toolid != data->toolid) {
+        return false;
+    }
+    data->handle = handle;
+    return true;
+}
+
+static Cocoa_PenHandle *Cocoa_FindPenByDeviceID(NSUInteger deviceid, NSUInteger toolid)
+{
+    FindPenByDeviceAndToolIDData data;
+    data.deviceid = deviceid;
+    data.toolid = toolid;
+    data.handle = NULL;
+    SDL_FindPenByCallback(FindPenByDeviceAndToolID, &data);
+    return (Cocoa_PenHandle *) data.handle;
+}
+
+static void Cocoa_HandlePenProximityEvent(SDL_CocoaWindowData *_data, NSEvent *event)
+{
+    const NSUInteger devid = [event deviceID];
+    const NSUInteger toolid = [event pointingDeviceID];
+
+    if (event.enteringProximity) {  // new pen coming!
+        const NSPointingDeviceType devtype = [event pointingDeviceType];
+        const bool is_eraser = (devtype == NSPointingDeviceTypeEraser);
+        const bool is_pen = (devtype == NSPointingDeviceTypePen);
+        if (!is_eraser && !is_pen) {
+            return;  // we ignore other things, which hopefully is right.
+        }
+
+        Cocoa_PenHandle *handle = (Cocoa_PenHandle *) SDL_calloc(1, sizeof (*handle));
+        if (!handle) {
+            return;  // oh well.
+        }
+
+        // Cocoa offers almost none of this information as specifics, but can without warning offer any of these specific things.
+        SDL_PenInfo peninfo;
+        SDL_zero(peninfo);
+        peninfo.capabilities = SDL_PEN_CAPABILITY_PRESSURE | SDL_PEN_CAPABILITY_ROTATION | SDL_PEN_CAPABILITY_XTILT | SDL_PEN_CAPABILITY_YTILT | SDL_PEN_CAPABILITY_TANGENTIAL_PRESSURE | (is_eraser ? SDL_PEN_CAPABILITY_ERASER : 0);
+        peninfo.max_tilt = 90.0f;
+        peninfo.num_buttons = 2;
+        peninfo.subtype = is_eraser ? SDL_PEN_TYPE_ERASER : SDL_PEN_TYPE_PEN;
+
+        handle->deviceid = devid;
+        handle->toolid = toolid;
+        handle->is_eraser = is_eraser;
+        handle->pen = SDL_AddPenDevice(Cocoa_GetEventTimestamp([event timestamp]), NULL, &peninfo, handle);
+        if (!handle->pen) {
+            SDL_free(handle);  // oh well.
+        }
+    } else {  // old pen leaving!
+        Cocoa_PenHandle *handle = Cocoa_FindPenByDeviceID(devid, toolid);
+        if (handle) {
+            SDL_RemovePenDevice(Cocoa_GetEventTimestamp([event timestamp]), handle->pen);
+            SDL_free(handle);
+        }
+    }
+}
+
+static void Cocoa_HandlePenPointEvent(SDL_CocoaWindowData *_data, NSEvent *event)
+{
+    const Uint64 timestamp = Cocoa_GetEventTimestamp([event timestamp]);
+    Cocoa_PenHandle *handle = Cocoa_FindPenByDeviceID([event deviceID], [event pointingDeviceID]);
+    if (!handle) {
+        return;
+    }
+
+    const SDL_PenID pen = handle->pen;
+    const NSEventButtonMask buttons = [event buttonMask];
+    const NSPoint tilt = [event tilt];
+    const NSPoint point = [event locationInWindow];
+    const bool is_touching = (buttons & NSEventButtonMaskPenTip) != 0;
+    SDL_Window *window = _data.window;
+
+    SDL_SendPenTouch(timestamp, pen, window, handle->is_eraser, is_touching);
+    SDL_SendPenMotion(timestamp, pen, window, (float) point.x, (float) (window->h - point.y));
+    SDL_SendPenButton(timestamp, pen, window, 1, ((buttons & NSEventButtonMaskPenLowerSide) != 0));
+    SDL_SendPenButton(timestamp, pen, window, 2, ((buttons & NSEventButtonMaskPenUpperSide) != 0));
+    SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_PRESSURE, [event pressure]);
+    SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_ROTATION, [event rotation]);
+    SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_XTILT, ((float) tilt.x) * 90.0f);
+    SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_YTILT, ((float) -tilt.y) * 90.0f);
+    SDL_SendPenAxis(timestamp, pen, window, SDL_PEN_AXIS_TANGENTIAL_PRESSURE, event.tangentialPressure);
+}
+
+bool Cocoa_HandlePenEvent(SDL_CocoaWindowData *_data, NSEvent *event)
+{
+    NSEventType type = [event type];
+
+    if ((type != NSEventTypeTabletPoint) && (type != NSEventTypeTabletProximity)) {
+        const NSEventSubtype subtype = [event subtype];
+        if (subtype == NSEventSubtypeTabletPoint) {
+            type = NSEventTypeTabletPoint;
+        } else if (subtype == NSEventSubtypeTabletProximity) {
+            type = NSEventTypeTabletProximity;
+        } else {
+            return false;  // not a tablet event.
+        }
+    }
+
+    if (type == NSEventTypeTabletPoint) {
+        Cocoa_HandlePenPointEvent(_data, event);
+    } else if (type == NSEventTypeTabletProximity) {
+        Cocoa_HandlePenProximityEvent(_data, event);
+    } else {
+        return false;  // not a tablet event.
+    }
+
+    return true;
+}
+
+static void Cocoa_FreePenHandle(SDL_PenID instance_id, void *handle, void *userdata)
+{
+    SDL_free(handle);
+}
+
+void Cocoa_QuitPen(SDL_VideoDevice *_this)
+{
+    SDL_RemoveAllPenDevices(Cocoa_FreePenHandle, NULL);
+}
+
+#endif // SDL_VIDEO_DRIVER_COCOA