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Code Issues Releases Activity

Fix coordinate transformations in sfnt.c

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Backport.

* src/sfnt.c (sfnt_transform_coordinates):
(sfnt_transform_f26dot6): Fix calculation of transformed coordinates in
the very rare case of arbitrary transformation matrices.
This commit is contained in:
Pip Cet 2024-08-10 17:01:44 +00:00
parent 4dd953d3cc
commit 8e925d582a
1 changed files with 8 additions and 4 deletions
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12
src/sfnt.c
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@ -2578,8 +2578,10 @@ sfnt_transform_coordinates (struct sfnt_compound_glyph_component *component,
for (i = 0; i < num_coordinates; ++i) for (i = 0; i < num_coordinates; ++i)
{ {
x[i] = m1 * x[i] + m2 * y[i] + m3 * 1; sfnt_fixed xi = m1 * x[i] + m2 * y[i] + m3 * 1;
y[i] = m4 * x[i] + m5 * y[i] + m6 * 1; sfnt_fixed yi = m4 * x[i] + m5 * y[i] + m6 * 1;
x[i] = xi;
y[i] = yi;
} }
} }
@ -12822,8 +12824,10 @@ sfnt_transform_f26dot6 (struct sfnt_compound_glyph_component *component,
for (i = 0; i < num_coordinates; ++i) for (i = 0; i < num_coordinates; ++i)
{ {
x[i] = m1 * x[i] + m2 * y[i] + m3 * 1; sfnt_f26dot6 xi = m1 * x[i] + m2 * y[i] + m3 * 1;
y[i] = m4 * x[i] + m5 * y[i] + m6 * 1; sfnt_f26dot6 yi = m4 * x[i] + m5 * y[i] + m6 * 1;
x[i] = xi;
y[i] = yi;
} }
} }