diff options
Diffstat (limited to 'def.go')
| -rw-r--r-- | def.go | 90 |
1 files changed, 80 insertions, 10 deletions
@@ -246,21 +246,91 @@ type fontBoxType struct { Xmin, Ymin, Xmax, Ymax int } -type fontDescType struct { - Ascent int - Descent int - CapHeight int - Flags int - FontBBox fontBoxType - ItalicAngle int - StemV int +// Font flags for FontDescType.Flags as defined in the pdf specification. +const ( + // FontFlagFixedPitch is set if all glyphs have the same width (as + // opposed to proportional or variable-pitch fonts, which have + // different widths). + FontFlagFixedPitch = 1 << 0 + // FontFlagSerif is set if glyphs have serifs, which are short + // strokes drawn at an angle on the top and bottom of glyph stems. + // (Sans serif fonts do not have serifs.) + FontFlagSerif = 1 << 1 + // FontFlagSymbolic is set if font contains glyphs outside the + // Adobe standard Latin character set. This flag and the + // Nonsymbolic flag shall not both be set or both be clear. + FontFlagSymbolic = 1 << 2 + // FontFlagScript is set if glyphs resemble cursive handwriting. + FontFlagScript = 1 << 3 + // FontFlagNonsymbolic is set if font uses the Adobe standard + // Latin character set or a subset of it. + FontFlagNonsymbolic = 1 << 5 + // FontFlagItalic is set if glyphs have dominant vertical strokes + // that are slanted. + FontFlagItalic = 1 << 6 + // FontFlagAllCap is set if font contains no lowercase letters; + // typically used for display purposes, such as for titles or + // headlines. + FontFlagAllCap = 1 << 16 + // SmallCap is set if font contains both uppercase and lowercase + // letters. The uppercase letters are similar to those in the + // regular version of the same typeface family. The glyphs for the + // lowercase letters have the same shapes as the corresponding + // uppercase letters, but they are sized and their proportions + // adjusted so that they have the same size and stroke weight as + // lowercase glyphs in the same typeface family. + SmallCap = 1 << 18 + // ForceBold determines whether bold glyphs shall be painted with + // extra pixels even at very small text sizes by a conforming + // reader. If the ForceBold flag is set, features of bold glyphs + // may be thickened at small text sizes. + ForceBold = 1 << 18 +) + +// FontDescType (font descriptor) specifies metrics and other +// attributes of a font, as distinct from the metrics of individual +// glyphs (as defined in the pdf specification). +type FontDescType struct { + // The maximum height above the baseline reached by glyphs in this + // font (for example for "S"). The height of glyphs for accented + // characters shall be excluded. + Ascent int + // The maximum depth below the baseline reached by glyphs in this + // font. The value shall be a negative number. + Descent int + // The vertical coordinate of the top of flat capital letters, + // measured from the baseline (for example "H"). + CapHeight int + // A collection of flags defining various characteristics of the + // font. (See the FontFlag* constants.) + Flags int + // A rectangle, expressed in the glyph coordinate system, that + // shall specify the font bounding box. This should be the smallest + // rectangle enclosing the shape that would result if all of the + // glyphs of the font were placed with their origins coincident + // and then filled. + FontBBox fontBoxType + // The angle, expressed in degrees counterclockwise from the + // vertical, of the dominant vertical strokes of the font. (The + // 9-o’clock position is 90 degrees, and the 3-o’clock position + // is –90 degrees.) The value shall be negative for fonts that + // slope to the right, as almost all italic fonts do. + ItalicAngle int + // The thickness, measured horizontally, of the dominant vertical + // stems of glyphs in the font. + StemV int + // The width to use for character codes whose widths are not + // specified in a font dictionary’s Widths array. This shall have + // a predictable effect only if all such codes map to glyphs whose + // actual widths are the same as the value of the MissingWidth + // entry. (Default value: 0.) MissingWidth int } type fontDefType struct { Tp string // "Core", "TrueType", ... Name string // "Courier-Bold", ... - Desc fontDescType // Font descriptor + Desc FontDescType // Font descriptor Up int // Underline position Ut int // Underline thickness Cw [256]int // Character width by ordinal @@ -285,5 +355,5 @@ type fontInfoType struct { UnderlinePosition int Widths [256]int Size1, Size2 uint32 - Desc fontDescType + Desc FontDescType } |