dosfont

package module

v0.0.0-...-baf68bd Latest Latest Go to latest Published: Jul 4, 2019 License: Apache-2.0 Imports: 11 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/threez/go-dosfont

Links

Open Source Insights

README ¶

go-dosfont

Implementation of the PSF/MZ font file format. With this library you can use the old dos bitmap fonts in go.

Example

fonts, err := OpenFonts("fonts/NEW1252.FON")

// use font face fonts[i].Face
// of type golang.org/x/image/font/basicfont.Face

Rendering

fonts/NEW1252.FON.png

TODO

Implementation of the PE format

Resources

Other resources for implementing the font lib.

Implementations / Documentation

https://www.seasip.info/Unix/PSF/
https://www.lowlevel.eu/wiki/
https://www.win.tue.nl/~aeb/linux/kbd/font-formats-1.html
Microsoft_Portable_Executable_and_Common_Object_File_Format
https://de.wikipedia.org/wiki/MZ-Datei
http://www.delorie.com/djgpp/doc/exe/
https://www.chiark.greenend.org.uk/~sgtatham/fonts/
https://github.com/golang/image/blob/master/font/inconsolata/regular8x16.go
https://fontforge.github.io/en-US/

Test fonts

The fonts used for testing are sourced from https://www.uwe-sieber.de/dosfon.html. Thanks for your free font Uwe Sieber.

Documentation ¶

Index ¶

Variables
type Font
- func OpenFonts(path string) ([]Font, error)
- func ReadFonts(r io.ReadSeeker) ([]Font, error)
type MZ
- func ReadMZ(r io.ReadSeeker) (*MZ, error)
- func (mz *MZ) Resources(filterType uint16) []Resource
type Resource

Constants ¶

This section is empty.

Variables ¶

View Source

var ErrFontHeaderTooShort = errors.New("Error psf header too short")

ErrFontHeaderTooShort error in case the header is to short

View Source

var ErrHeaderToShort = errors.New("Error MZ header too short")

ErrHeaderToShort error in case the mz header is too short

View Source

var ErrInvalidOffset = errors.New("Error MZ file contains invalid offset")

ErrInvalidOffset the resource table contains invalid offsets

View Source

var ErrNoMZFile = errors.New("Error no MZ file")

ErrNoMZFile the passed reader doesn't contain the correct header

Functions ¶

This section is empty.

Types ¶

type Font ¶

type Font struct {
	Version         uint16 `struc:"uint16,little"`
	Size            uint32 `struc:"uint32,little"`
	Copyright       string `struc:"[60]byte"`
	Type            uint16 `struc:"uint16,little"`
	Points          uint16 `struc:"uint16,little"`
	VertRes         uint16 `struc:"uint16,little"`
	HorizRes        uint16 `struc:"uint16,little"`
	Ascent          uint16 `struc:"uint16,little"`
	InternalLeading uint16 `struc:"uint16,little"`
	ExternalLeading uint16 `struc:"uint16,little"`
	Italic          bool
	Underline       bool
	StrikeOut       bool
	Weight          uint16 `struc:"uint16,little"`
	CharSet         uint8
	PixWidth        uint16 `struc:"uint16,little"`
	PixHeight       uint16 `struc:"uint16,little"`
	PitchAndFamily  uint8
	AvgWidth        uint16 `struc:"uint16,little"`
	MaxWidth        uint16 `struc:"uint16,little"`
	FirstChar       uint8
	LastChar        uint8
	DefaultChar     uint8
	BreakChar       uint8
	WidthBytes      uint16 `struc:"uint16,little"`
	Device          uint16 `struc:"uint16,little"`
	FaceData        uint16 `struc:"uint16,little"`
	BitsPointer     uint16 `struc:"uint16,little"`
	BitsOffset      uint16 `struc:"uint16,little"`
	Reserved        uint8
	Name            string `struc:"skip"`
	basicfont.Face  `struc:"skip"`
}

Font contains all the PC Screen Font (PSF) meta data and font face.

func OpenFonts ¶

func OpenFonts(path string) ([]Font, error)

OpenFonts opens the file under given location and returns contained fonts

func ReadFonts ¶

func ReadFonts(r io.ReadSeeker) ([]Font, error)

ReadFonts reads font faces from a read seeker

type MZ ¶

type MZ struct {
	Signature          uint16 `struc:"uint16,little"`
	BytesInLastBlock   uint16 `struc:"uint16,little"`
	BlocksInFile       uint16 `struc:"uint16,little"`
	NumRelocs          uint16 `struc:"uint16,little"`
	HeaderParagraphs   uint16 `struc:"uint16,little"`
	MinExtraParagraphs uint16 `struc:"uint16,little"`
	MaxExtraParagraphs uint16 `struc:"uint16,little"`
	Ss                 uint16 `struc:"uint16,little"`
	Sp                 uint16 `struc:"uint16,little"`
	Checksum           uint16 `struc:"uint16,little"`
	IP                 uint16 `struc:"uint16,little"`
	Cs                 uint16 `struc:"uint16,little"`
	RelocTableOffset   uint16 `struc:"uint16,little"`
	OverlayNumber      uint16 `struc:"uint16,little"`
	Unknown            []byte `struc:"[32]pad"`
	COFFHeaderOffset   uint32 `struc:"uint32,little"` // at 0x3c
	// contains filtered or unexported fields
}

MZ dos resource container

func ReadMZ ¶

func ReadMZ(r io.ReadSeeker) (*MZ, error)

ReadMZ reads the MZ file from the passed reader

func (*MZ) Resources ¶

func (mz *MZ) Resources(filterType uint16) []Resource

Resources filters for resources of passed type, that are contained inside the MZ file

type Resource ¶

type Resource struct {
	Start uint16
	Size  uint16
	Type  uint16
}

Resource resource table entry

Source Files ¶

View all Source files

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