diff options
Diffstat (limited to 'freetype/include/freetype/freetype.h')
| -rw-r--r-- | freetype/include/freetype/freetype.h | 49 |
1 files changed, 38 insertions, 11 deletions
diff --git a/freetype/include/freetype/freetype.h b/freetype/include/freetype/freetype.h index d6cebbc4b..8df4828f6 100644 --- a/freetype/include/freetype/freetype.h +++ b/freetype/include/freetype/freetype.h @@ -1109,8 +1109,8 @@ FT_BEGIN_HEADER * FT_HAS_VERTICAL( face ) * * @description: - * A macro that returns true whenever a face object contains vertical - * metrics. + * A macro that returns true whenever a face object contains real + * vertical metrics (and not only synthesized ones). * */ #define FT_HAS_VERTICAL( face ) \ @@ -2231,6 +2231,12 @@ FT_BEGIN_HEADER /* particular bitmap strike. Use @FT_Select_Size instead in that */ /* case. */ /* */ + /* The relation between the requested size and the resulting glyph */ + /* size is dependent entirely on how the size is defined in the */ + /* source face. The font designer chooses the final size of each */ + /* glyph relative to this size. For more information refer to */ + /* `http://www.freetype.org/freetype2/docs/glyphs/glyphs-2.html' */ + /* */ FT_EXPORT( FT_Error ) FT_Request_Size( FT_Face face, FT_Size_Request req ); @@ -2300,6 +2306,11 @@ FT_BEGIN_HEADER /* <Return> */ /* FreeType error code. 0~means success. */ /* */ + /* <Note> */ + /* You should not rely on the resulting glyphs matching, or being */ + /* constrained, to this pixel size. Refer to @FT_Request_Size to */ + /* understand how requested sizes relate to actual sizes. */ + /* */ FT_EXPORT( FT_Error ) FT_Set_Pixel_Sizes( FT_Face face, FT_UInt pixel_width, @@ -2413,14 +2424,20 @@ FT_BEGIN_HEADER * behaviour to more specific and useful cases. * * FT_LOAD_NO_SCALE :: - * Don't scale the outline glyph loaded, but keep it in font units. + * Don't scale the loaded outline glyph but keep it in font units. * * This flag implies @FT_LOAD_NO_HINTING and @FT_LOAD_NO_BITMAP, and * unsets @FT_LOAD_RENDER. * + * If the font is `tricky' (see @FT_FACE_FLAG_TRICKY for more), using + * FT_LOAD_NO_SCALE usually yields meaningless outlines because the + * subglyphs must be scaled and positioned with hinting instructions. + * This can be solved by loading the font without FT_LOAD_NO_SCALE and + * setting the character size to `font->units_per_EM'. + * * FT_LOAD_NO_HINTING :: - * Disable hinting. This generally generates `blurrier' bitmap glyph - * when the glyph is rendered in any of the anti-aliased modes. See + * Disable hinting. This generally generates `blurrier' bitmap glyphs + * when the glyph are rendered in any of the anti-aliased modes. See * also the note below. * * This flag is implied by @FT_LOAD_NO_SCALE. @@ -2439,8 +2456,14 @@ FT_BEGIN_HEADER * @FT_LOAD_NO_SCALE always sets this flag. * * FT_LOAD_VERTICAL_LAYOUT :: - * Load the glyph for vertical text layout. _Don't_ use it as it is - * problematic currently. + * Load the glyph for vertical text layout. In particular, the + * `advance' value in the @FT_GlyphSlotRec structure is set to the + * `vertAdvance' value of the `metrics' field. + * + * In case @FT_HAS_VERTICAL doesn't return true, you shouldn't use + * this flag currently. Reason is that in this case vertical metrics + * get synthesized, and those values are not always consistent across + * various font formats. * * FT_LOAD_FORCE_AUTOHINT :: * Indicates that the auto-hinter is preferred over the font's native @@ -3401,9 +3424,13 @@ FT_BEGIN_HEADER /* code range for CJK characters. */ /* */ /* An IVS is registered and unique; for further details please refer */ - /* to Unicode Technical Report #37, the Ideographic Variation */ - /* Database. To date (October 2007), the character with the most */ - /* variants is U+908A, having 8~such IVS. */ + /* to Unicode Technical Standard #37, the Ideographic Variation */ + /* Database: */ + /* */ + /* http://www.unicode.org/reports/tr37/ */ + /* */ + /* To date (November 2012), the character with the most variants is */ + /* U+9089, having 31 such IVS. */ /* */ /* Adobe and MS decided to support IVS with a new cmap subtable */ /* (format~14). It is an odd subtable because it is not a mapping of */ @@ -3852,7 +3879,7 @@ FT_BEGIN_HEADER */ #define FREETYPE_MAJOR 2 #define FREETYPE_MINOR 4 -#define FREETYPE_PATCH 10 +#define FREETYPE_PATCH 11 /*************************************************************************/ |