1 files changed, 129 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/video/x11/SDL_x11settings.c b/contrib/SDL-3.2.8/src/video/x11/SDL_x11settings.c
new file mode 100644
index 0000000..7a7ae01
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/x11/SDL_x11settings.c
@@ -0,0 +1,129 @@
+/*
+  Simple DirectMedia Layer
+  Copyright 2024 Igalia S.L.
+
+  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"
+
+#if defined(SDL_VIDEO_DRIVER_X11)
+
+#include "SDL_x11video.h"
+#include "SDL_x11settings.h"
+
+#define SDL_XSETTINGS_GDK_WINDOW_SCALING_FACTOR "Gdk/WindowScalingFactor"
+#define SDL_XSETTINGS_XFT_DPI "Xft/DPI"
+
+static void X11_XsettingsNotify(const char *name, XSettingsAction action, XSettingsSetting *setting, void *data)
+{
+    SDL_VideoDevice *_this = data;
+    float scale_factor = 1.0;
+    int i;
+
+    if (SDL_strcmp(name, SDL_XSETTINGS_GDK_WINDOW_SCALING_FACTOR) != 0 ||
+        SDL_strcmp(name, SDL_XSETTINGS_XFT_DPI) != 0) {
+        return;
+    }
+
+    if (setting->type != XSETTINGS_TYPE_INT) {
+        return;
+    }
+
+    switch (action) {
+    case XSETTINGS_ACTION_NEW:
+        SDL_FALLTHROUGH;
+    case XSETTINGS_ACTION_CHANGED:
+        scale_factor = setting->data.v_int;
+        if (SDL_strcmp(name, SDL_XSETTINGS_XFT_DPI) == 0) {
+            scale_factor = scale_factor / 1024.0f / 96.0f;
+        }
+        break;
+    case XSETTINGS_ACTION_DELETED:
+        scale_factor = 1.0;
+        break;
+    }
+
+    if (_this) {
+        for (i = 0; i < _this->num_displays; ++i) {
+            SDL_SetDisplayContentScale(_this->displays[i], scale_factor);
+        }
+    }
+}
+
+void X11_InitXsettings(SDL_VideoDevice *_this)
+{
+    SDL_VideoData *data = _this->internal;
+    SDLX11_SettingsData *xsettings_data = &data->xsettings_data;
+
+    xsettings_data->xsettings = xsettings_client_new(data->display,
+        DefaultScreen(data->display), X11_XsettingsNotify, NULL, _this);
+
+}
+
+void X11_QuitXsettings(SDL_VideoDevice *_this)
+{
+    SDL_VideoData *data = _this->internal;
+    SDLX11_SettingsData *xsettings_data = &data->xsettings_data;
+
+    if (xsettings_data->xsettings) {
+        xsettings_client_destroy(xsettings_data->xsettings);
+        xsettings_data->xsettings = NULL;
+    }
+}
+
+void X11_HandleXsettings(SDL_VideoDevice *_this, const XEvent *xevent)
+{
+    SDL_VideoData *data = _this->internal;
+    SDLX11_SettingsData *xsettings_data = &data->xsettings_data;
+
+    if (xsettings_data->xsettings) {
+        if (!xsettings_client_process_event(xsettings_data->xsettings, xevent)) {
+            xsettings_client_destroy(xsettings_data->xsettings);
+            xsettings_data->xsettings = NULL;
+        }
+    }
+}
+
+int X11_GetXsettingsIntKey(SDL_VideoDevice *_this, const char *key, int fallback_value) {
+    SDL_VideoData *data = _this->internal;
+    SDLX11_SettingsData *xsettings_data = &data->xsettings_data;
+    XSettingsSetting *setting = NULL;
+    int res = fallback_value;
+
+
+    if (xsettings_data->xsettings) {
+        if (xsettings_client_get_setting(xsettings_data->xsettings, key, &setting) != XSETTINGS_SUCCESS) {
+            goto no_key;
+        }
+
+        if (setting->type != XSETTINGS_TYPE_INT) {
+            goto no_key;
+        }
+
+        res = setting->data.v_int;
+    }
+
+no_key:
+    if (setting) {
+        xsettings_setting_free(setting);
+    }
+
+    return res;
+}
+
+#endif // SDL_VIDEO_DRIVER_X11