diff options
Diffstat (limited to 'include/internal/ftobjs.h')
| -rw-r--r-- | include/internal/ftobjs.h | 30 |
1 files changed, 20 insertions, 10 deletions
diff --git a/include/internal/ftobjs.h b/include/internal/ftobjs.h index faa37f8..37317a4 100644 --- a/include/internal/ftobjs.h +++ b/include/internal/ftobjs.h @@ -4,7 +4,7 @@ /* */ /* The FreeType private base classes (specification). */ /* */ -/* Copyright 1996-2006, 2008, 2010, 2012-2013 by */ +/* Copyright 1996-2015 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -72,12 +72,23 @@ FT_BEGIN_HEADER #define FT_ABS( a ) ( (a) < 0 ? -(a) : (a) ) - -#define FT_PAD_FLOOR( x, n ) ( (x) & ~((n)-1) ) + /* + * Approximate sqrt(x*x+y*y) using the `alpha max plus beta min' + * algorithm. We use alpha = 1, beta = 3/8, giving us results with a + * largest error less than 7% compared to the exact value. + */ +#define FT_HYPOT( x, y ) \ + ( x = FT_ABS( x ), \ + y = FT_ABS( y ), \ + x > y ? x + ( 3 * y >> 3 ) \ + : y + ( 3 * x >> 3 ) ) + + /* we use the TYPEOF macro to suppress signedness compilation warnings */ +#define FT_PAD_FLOOR( x, n ) ( (x) & ~TYPEOF( x )( (n)-1 ) ) #define FT_PAD_ROUND( x, n ) FT_PAD_FLOOR( (x) + ((n)/2), n ) #define FT_PAD_CEIL( x, n ) FT_PAD_FLOOR( (x) + ((n)-1), n ) -#define FT_PIX_FLOOR( x ) ( (x) & ~63 ) +#define FT_PIX_FLOOR( x ) ( (x) & ~TYPEOF( x )63 ) #define FT_PIX_ROUND( x ) FT_PIX_FLOOR( (x) + 32 ) #define FT_PIX_CEIL( x ) FT_PIX_FLOOR( (x) + 63 ) @@ -394,7 +405,7 @@ FT_BEGIN_HEADER /* glyph_hints :: Format-specific glyph hints management. */ /* */ -#define FT_GLYPH_OWN_BITMAP 0x1 +#define FT_GLYPH_OWN_BITMAP 0x1U typedef struct FT_Slot_InternalRec_ { @@ -603,12 +614,12 @@ FT_BEGIN_HEADER #define FT_REQUEST_WIDTH( req ) \ ( (req)->horiResolution \ - ? (FT_Pos)( (req)->width * (req)->horiResolution + 36 ) / 72 \ + ? ( (req)->width * (FT_Pos)(req)->horiResolution + 36 ) / 72 \ : (req)->width ) #define FT_REQUEST_HEIGHT( req ) \ ( (req)->vertResolution \ - ? (FT_Pos)( (req)->height * (req)->vertResolution + 36 ) / 72 \ + ? ( (req)->height * (FT_Pos)(req)->vertResolution + 36 ) / 72 \ : (req)->height ) @@ -730,9 +741,8 @@ FT_BEGIN_HEADER /* faces_list :: The list of faces currently opened by this */ /* driver. */ /* */ - /* glyph_loader :: The glyph loader for all faces managed by this */ - /* driver. This object isn't defined for unscalable */ - /* formats. */ + /* glyph_loader :: Unused. Used to be glyph loader for all faces */ + /* managed by this driver. */ /* */ typedef struct FT_DriverRec_ { |