1 files changed, 67 insertions, 0 deletions

diff --git a/contrib/SDL-3.2.8/src/video/riscos/SDL_riscosmessagebox.c b/contrib/SDL-3.2.8/src/video/riscos/SDL_riscosmessagebox.c
new file mode 100644
index 0000000..a4b358c
--- /dev/null
+++ b/contrib/SDL-3.2.8/src/video/riscos/SDL_riscosmessagebox.c
@@ -0,0 +1,67 @@
+/*
+  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_RISCOS
+
+#include "SDL_riscosmessagebox.h"
+
+#include <kernel.h>
+#include <swis.h>
+
+bool RISCOS_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonID)
+{
+    _kernel_swi_regs regs;
+    _kernel_oserror error;
+    char buttonstring[1024];
+    int i;
+
+    error.errnum = 0;
+    SDL_strlcpy(error.errmess, messageboxdata->message, 252);
+    regs.r[0] = (unsigned int)&error;
+
+    regs.r[1] = (1 << 8) | (1 << 4);
+    if (messageboxdata->flags & SDL_MESSAGEBOX_INFORMATION) {
+        regs.r[1] |= (1 << 9);
+    } else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) {
+        regs.r[1] |= (2 << 9);
+    }
+
+    regs.r[2] = (unsigned int)messageboxdata->title;
+    regs.r[3] = 0;
+    regs.r[4] = 0;
+
+    SDL_strlcpy(buttonstring, "", 1024);
+    for (i = 0; i < messageboxdata->numbuttons; i++) {
+        SDL_strlcat(buttonstring, messageboxdata->buttons[i].text, 1024);
+        if (i + 1 < messageboxdata->numbuttons) {
+            SDL_strlcat(buttonstring, ",", 1024);
+        }
+    }
+    regs.r[5] = (unsigned int)buttonstring;
+
+    _kernel_swi(Wimp_ReportError, &regs, &regs);
+
+    *buttonID = (regs.r[1] == 0) ? -1 : messageboxdata->buttons[regs.r[1] - 3].buttonID;
+    return true;
+}
+
+#endif // SDL_VIDEO_DRIVER_RISCOS