diff options
Diffstat (limited to 'freetype/include/freetype/ftimage.h')
| -rw-r--r-- | freetype/include/freetype/ftimage.h | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/freetype/include/freetype/ftimage.h b/freetype/include/freetype/ftimage.h index 2fcc113ad..0272e92d2 100644 --- a/freetype/include/freetype/ftimage.h +++ b/freetype/include/freetype/ftimage.h @@ -5,7 +5,8 @@ /* FreeType glyph image formats and default raster interface */ /* (specification). */ /* */ -/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 by */ +/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */ +/* 2010 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ @@ -51,10 +52,9 @@ FT_BEGIN_HEADER /* FT_Pos */ /* */ /* <Description> */ - /* The type FT_Pos is a 32-bit integer used to store vectorial */ - /* coordinates. Depending on the context, these can represent */ - /* distances in integer font units, or 16.16, or 26.6 fixed float */ - /* pixel coordinates. */ + /* The type FT_Pos is used to store vectorial coordinates. Depending */ + /* on the context, these can represent distances in integer font */ + /* units, or 16.16, or 26.6 fixed float pixel coordinates. */ /* */ typedef signed long FT_Pos; @@ -99,6 +99,20 @@ FT_BEGIN_HEADER /* */ /* yMax :: The vertical maximum (top-most). */ /* */ + /* <Note> */ + /* The bounding box is specified with the coordinates of the lower */ + /* left and the upper right corner. In PostScript, those values are */ + /* often called (llx,lly) and (urx,ury), respectively. */ + /* */ + /* If `yMin' is negative, this value gives the glyph's descender. */ + /* Otherwise, the glyph doesn't descend below the baseline. */ + /* Similarly, if `ymax' is positive, this value gives the glyph's */ + /* ascender. */ + /* */ + /* `xMin' gives the horizontal distance from the glyph's origin to */ + /* the left edge of the glyph's bounding box. If `xMin' is negative, */ + /* the glyph extends to the left of the origin. */ + /* */ typedef struct FT_BBox_ { FT_Pos xMin, yMin; @@ -254,6 +268,9 @@ FT_BEGIN_HEADER /* flow. In all cases, the pitch is an offset to add */ /* to a bitmap pointer in order to go down one row. */ /* */ + /* For the B/W rasterizer, `pitch' is always an even */ + /* number. */ + /* */ /* buffer :: A typeless pointer to the bitmap buffer. This */ /* value should be aligned on 32-bit boundaries in */ /* most cases. */ @@ -563,8 +580,8 @@ FT_BEGIN_HEADER /* FT_Outline_ConicToFunc */ /* */ /* <Description> */ - /* A function pointer type use to describe the signature of a `conic */ - /* to' function during outline walking/decomposition. */ + /* A function pointer type used to describe the signature of a `conic */ + /* to' function during outline walking or decomposition. */ /* */ /* A `conic to' is emitted to indicate a second-order Bézier arc in */ /* the outline. */ @@ -596,7 +613,7 @@ FT_BEGIN_HEADER /* */ /* <Description> */ /* A function pointer type used to describe the signature of a `cubic */ - /* to' function during outline walking/decomposition. */ + /* to' function during outline walking or decomposition. */ /* */ /* A `cubic to' is emitted to indicate a third-order Bézier arc. */ /* */ @@ -629,8 +646,7 @@ FT_BEGIN_HEADER /* */ /* <Description> */ /* A structure to hold various function pointers used during outline */ - /* decomposition in order to emit segments, conic, and cubic Béziers, */ - /* as well as `move to' and `close to' operations. */ + /* decomposition in order to emit segments, conic, and cubic Béziers. */ /* */ /* <Fields> */ /* move_to :: The `move to' emitter. */ @@ -657,7 +673,7 @@ FT_BEGIN_HEADER /* y' = (x << shift) - delta */ /* } */ /* */ - /* Set the value of `shift' and `delta' to~0 to get the original */ + /* Set the values of `shift' and `delta' to~0 to get the original */ /* point coordinates. */ /* */ typedef struct FT_Outline_Funcs_ |