commit d7bdcb1bb513ac1db99be7461e63f538f9c62293
author Dominik Röttsches <drott@chromium.org> Fri Jul 23 19:37:47 2021 +0300
committer Werner Lemberg <wl@gnu.org> Thu Jul 29 05:56:15 2021 +0000
tree 65f9e6ac5ef03672b220cd1eba2817f82fb0d817
parent 6af39c3d767a40fae28124292400776138b974d3

[sfnt] 'COLR' v1 PaintTranslate and PaintScale precision

* src/sfnt/ttcolr.c (read_paint): Implement spec changes in
PaintTranslate and PaintScale and friends.  Update parsing to read
new shorter values.

src/sfnt/ttcolr.c

diff --git a/src/sfnt/ttcolr.c b/src/sfnt/ttcolr.c
index bd478ab..ad305ac 100644
--- a/src/sfnt/ttcolr.c
+++ b/src/sfnt/ttcolr.c
@@ -566,8 +566,8 @@
       apaint->u.translate.paint.p                     = child_table_p;
       apaint->u.translate.paint.insert_root_transform = 0;
 
-      apaint->u.translate.dx = FT_NEXT_LONG( p );
-      apaint->u.translate.dy = FT_NEXT_LONG( p );
+      apaint->u.translate.dx = FT_NEXT_SHORT( p ) << 16;
+      apaint->u.translate.dy = FT_NEXT_SHORT( p ) << 16;
 
       return 1;
     }
@@ -585,14 +585,14 @@
       apaint->u.scale.paint.insert_root_transform = 0;
 
       /* All scale paints get at least one scale value. */
-      apaint->u.scale.scale_x = FT_NEXT_LONG( p );
+      apaint->u.scale.scale_x = FT_NEXT_SHORT( p ) << 2;
 
       /* Non-uniform ones read an extra y value. */
       if ( apaint->format ==
              FT_COLR_PAINTFORMAT_SCALE                 ||
            (FT_PaintFormat_Internal)apaint->format ==
              FT_COLR_PAINTFORMAT_INTERNAL_SCALE_CENTER )
-        apaint->u.scale.scale_y = FT_NEXT_LONG( p );
+        apaint->u.scale.scale_y = FT_NEXT_SHORT( p ) << 2;
       else
         apaint->u.scale.scale_y = apaint->u.scale.scale_x;
 
@@ -603,8 +603,8 @@
            (FT_PaintFormat_Internal)apaint->format ==
              FT_COLR_PAINTFORMAT_INTERNAL_SCALE_UNIFORM_CENTER )
       {
-        apaint->u.scale.center_x = FT_NEXT_LONG ( p );
-        apaint->u.scale.center_y = FT_NEXT_LONG ( p );
+        apaint->u.scale.center_x = FT_NEXT_SHORT ( p ) << 16;
+        apaint->u.scale.center_y = FT_NEXT_SHORT ( p ) << 16;
       }
       else
       {