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freetype.h (FT_Set_Transform): Minor documentation update. 

In order to mention the limited accuracy of `FT_Matrix' coefficients
and encourage client code to perform the transform themselves with
floating point values instead.
This commit is contained in:
David Turner 2020-07-14 16:12:29 +02:00 committed by Werner Lemberg
parent 95de21ab19
commit 5fe7c044c2
1 changed files with 6 additions and 0 deletions
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include/freetype/freetype.h
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@ -3175,6 +3175,12 @@ FT_BEGIN_HEADER
* A pointer to the translation vector. Use `NULL` for the null vector.
*
* @note:
* This function is provided as a convenience, but keep in mind that
* @FT_Matrix coefficients are only 16.16 fixed point values, which can
* limit the accuracy of the results. Using floating-point computations
* to perform the transform directly in client code instead will always
* yield better numbers.
*
* The transformation is only applied to scalable image formats after the
* glyph has been loaded. It means that hinting is unaltered by the
* transformation and is performed on the character size given in the