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-rw-r--r--include/freetype/freetype.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/freetype/freetype.h b/include/freetype/freetype.h
index d34c48cb9..bc3073e1e 100644
--- a/include/freetype/freetype.h
+++ b/include/freetype/freetype.h
@@ -3399,6 +3399,11 @@ FT_BEGIN_HEADER
* output due to limited availability of pixel grid to store distance
* information.
*
+ * 4. Since the output buffer is normalized, precision at smaller spread
+ * will be greater than precision at larger spread values, because the
+ * output range of [0 .. 255] will be mapped to a smaller sdf range.
+ * A spread of 2 should be sufficient in most cases.
+ *
* Point (1) and (2) can be avoided by using `bsdf` and overall it is
* more stable than the `sdf` rasterizer.
*