SDL: testclipboard: added support for UCS-2 and UCS-4 text

From 0e7d5620c23bd9220bd20da8c908053efddba2b1 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 9 Oct 2025 10:22:23 -0700
Subject: [PATCH] testclipboard: added support for UCS-2 and UCS-4 text

Chrome uses UCS-2 text for text/x-moz-url content
---
 test/testclipboard.c | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/test/testclipboard.c b/test/testclipboard.c
index 85e887b6b8b73..ac884f901429a 100644
--- a/test/testclipboard.c
+++ b/test/testclipboard.c
@@ -92,9 +92,23 @@ SDL_AppResult SDL_AppEvent(void *appstate, SDL_Event *event)
 
 static float PrintClipboardText(float x, float y, const char *mime_type)
 {
-    void *data = SDL_GetClipboardData(mime_type, NULL);
+    size_t size;
+    void *data = SDL_GetClipboardData(mime_type, &size);
     if (data) {
-        SDL_RenderDebugText(renderer, x, y, (const char *)data);
+        char *text = (char *)data;
+        if (size > 2 && text[2] == '\0') {
+            /* UCS-4 data */
+            text = (char *)SDL_iconv_string("UTF-8", "UCS-4", data, size+4);
+        } else if (size > 1 && text[1] == '\0') {
+            /* UCS-2 data */
+            text = (char *)SDL_iconv_string("UTF-8", "UCS-2", data, size+2);
+        }
+        if (text) {
+            SDL_RenderDebugText(renderer, x, y, text);
+        }
+        if (text != data) {
+            SDL_free(text);
+        }
         SDL_free(data);
         return SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE + 2.0f;
     }