LibGfx/JPEGWriter: Fix crash on macOS when csize coefficient is 0

This fixes #21108
Author: https://github.com/warpdesign Commit: 68e916490b Pull-request: https://github.com/SerenityOS/serenity/pull/21352 Issue: https://github.com/SerenityOS/serenity/issues/21108 Reviewed-by: https://github.com/LucasChollet ✅ Reviewed-by: https://github.com/bplaat ✅ Reviewed-by: https://github.com/gmta
2025-09-02 15:46:33 +00:00 · 2023-10-06 11:55:20 +02:00 · 2023-10-06 11:55:20 +02:00 · 68e916490b · 2024-07-17 03:59:29 +09:00
commit 68e916490b
parent 80eec1e16b
3 changed files with 9 additions and 5 deletions
--- a/Userland/Libraries/LibGfx/ImageFormats/JPEGWriter.cpp
+++ b/Userland/Libraries/LibGfx/ImageFormats/JPEGWriter.cpp
@ -326,6 +326,10 @@ private:
    static u8 csize(i16 coefficient)
    {
        VERIFY(coefficient >= -2047 && coefficient <= 2047);
+
+        if (coefficient == 0)
+            return 0;
+
        return floor(log2(abs(coefficient))) + 1;
    }