SDL: Scale up the text for large displays

SDL Commits
1 
From 21b433536ae7748dbcb31a6a801c1c36d8ab4fec Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Mon, 13 Jan 2025 14:42:36 -0800
Subject: [PATCH] Scale up the text for large displays

---
 docs/hello.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/docs/hello.c b/docs/hello.c
index 1962dd80d574e..f513d9318abc0 100644
--- a/docs/hello.c
+++ b/docs/hello.c
@@ -19,6 +19,7 @@ int main(int argc, char *argv[])
     const char *message = "Hello World!";
     int w = 0, h = 0;
     float x, y;
+    const float scale = 4.0f;
     bool done = false;
 
     /* Create the window */
@@ -39,10 +40,11 @@ int main(int argc, char *argv[])
             }
         }
 
-        /* Center the message */
-        SDL_GetWindowSize(window, &w, &h);
-        x = (float)(w - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
-        y = (float)(h - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;
+        /* Center the message and scale it up */
+        SDL_GetRenderOutputSize(renderer, &w, &h);
+        SDL_SetRenderScale(renderer, scale, scale);
+        x = ((w / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
+        y = ((h / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;
 
         /* Draw the message */
         SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);