fontnik

package module
v1.0.3 Latest Latest
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 Go to latest Published: Sep 20, 2019 License: MIT Imports: 12 Imported by: 1

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Fontnik

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Generates Signed Distance Field glyphsets from OpenType fonts

Inspired by https://github.com/mapbox/sdf-glyph-foundry https://github.com/mapbox/tiny-sdf

Documentation

Index

Constants

View Source 
const INF = 1e20

Variables

This section is empty.

Functions

func CalcSDF 

func CalcSDF(img image.Image, radius float64, cutoff float64) []uint8

func DrawGlyph 

func DrawGlyph(glyph *Glyph, smoothstep bool) image.Image

func SavePNG 

func SavePNG(path string, img image.Image)

Types

type Fontstack 

type Fontstack struct {
	Name                 *string  `protobuf:"bytes,1,req,name=name" json:"name,omitempty"`
	Range                *string  `protobuf:"bytes,2,req,name=range" json:"range,omitempty"`
	Glyphs               []*Glyph `protobuf:"bytes,3,rep,name=glyphs" json:"glyphs,omitempty"`
	XXX_NoUnkeyedLiteral struct{} `json:"-"`
	XXX_unrecognized     []byte   `json:"-"`
	XXX_sizecache        int32    `json:"-"`
}

Stores fontstack information and a list of faces.

func (*Fontstack) Descriptor 

func (*Fontstack) Descriptor() ([]byte, []int)

func (*Fontstack) GetGlyphs 

func (m *Fontstack) GetGlyphs() []*Glyph

func (*Fontstack) GetName 

func (m *Fontstack) GetName() string

func (*Fontstack) GetRange 

func (m *Fontstack) GetRange() string

func (*Fontstack) ProtoMessage 

func (*Fontstack) ProtoMessage()

func (*Fontstack) Reset 

func (m *Fontstack) Reset()

func (*Fontstack) String 

func (m *Fontstack) String() string

func (*Fontstack) XXX_DiscardUnknown 

func (m *Fontstack) XXX_DiscardUnknown()

func (*Fontstack) XXX_Marshal 

func (m *Fontstack) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Fontstack) XXX_Merge 

func (m *Fontstack) XXX_Merge(src proto.Message)

func (*Fontstack) XXX_Size 

func (m *Fontstack) XXX_Size() int

func (*Fontstack) XXX_Unmarshal 

func (m *Fontstack) XXX_Unmarshal(b []byte) error

type Glyph 

type Glyph struct {
	Id *uint32 `protobuf:"varint,1,req,name=id" json:"id,omitempty"`
	// A signed distance field of the glyph with a border of 3 pixels.
	Bitmap []byte `protobuf:"bytes,2,opt,name=bitmap" json:"bitmap,omitempty"`
	// Glyph metrics.
	Width                *uint32  `protobuf:"varint,3,req,name=width" json:"width,omitempty"`
	Height               *uint32  `protobuf:"varint,4,req,name=height" json:"height,omitempty"`
	Left                 *int32   `protobuf:"zigzag32,5,req,name=left" json:"left,omitempty"`
	Top                  *int32   `protobuf:"zigzag32,6,req,name=top" json:"top,omitempty"`
	Advance              *uint32  `protobuf:"varint,7,req,name=advance" json:"advance,omitempty"`
	XXX_NoUnkeyedLiteral struct{} `json:"-"`
	XXX_unrecognized     []byte   `json:"-"`
	XXX_sizecache        int32    `json:"-"`
}

Stores a glyph with metrics and optional SDF bitmap information.

func (*Glyph) Descriptor 

func (*Glyph) Descriptor() ([]byte, []int)

func (*Glyph) GetAdvance 

func (m *Glyph) GetAdvance() uint32

func (*Glyph) GetBitmap 

func (m *Glyph) GetBitmap() []byte

func (*Glyph) GetHeight 

func (m *Glyph) GetHeight() uint32

func (*Glyph) GetId 

func (m *Glyph) GetId() uint32

func (*Glyph) GetLeft 

func (m *Glyph) GetLeft() int32

func (*Glyph) GetTop 

func (m *Glyph) GetTop() int32

func (*Glyph) GetWidth 

func (m *Glyph) GetWidth() uint32

func (*Glyph) ProtoMessage 

func (*Glyph) ProtoMessage()

func (*Glyph) Reset 

func (m *Glyph) Reset()

func (*Glyph) String 

func (m *Glyph) String() string

func (*Glyph) XXX_DiscardUnknown 

func (m *Glyph) XXX_DiscardUnknown()

func (*Glyph) XXX_Marshal 

func (m *Glyph) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Glyph) XXX_Merge 

func (m *Glyph) XXX_Merge(src proto.Message)

func (*Glyph) XXX_Size 

func (m *Glyph) XXX_Size() int

func (*Glyph) XXX_Unmarshal 

func (m *Glyph) XXX_Unmarshal(b []byte) error

type Glyphs 

type Glyphs struct {
	Stacks                       []*Fontstack `protobuf:"bytes,1,rep,name=stacks" json:"stacks,omitempty"`
	XXX_NoUnkeyedLiteral         struct{}     `json:"-"`
	proto.XXX_InternalExtensions `json:"-"`
	XXX_unrecognized             []byte `json:"-"`
	XXX_sizecache                int32  `json:"-"`
}

func (*Glyphs) Descriptor 

func (*Glyphs) Descriptor() ([]byte, []int)

func (*Glyphs) ExtensionRangeArray 

func (*Glyphs) ExtensionRangeArray() []proto.ExtensionRange

func (*Glyphs) GetStacks 

func (m *Glyphs) GetStacks() []*Fontstack

func (*Glyphs) ProtoMessage 

func (*Glyphs) ProtoMessage()

func (*Glyphs) Reset 

func (m *Glyphs) Reset()

func (*Glyphs) String 

func (m *Glyphs) String() string

func (*Glyphs) XXX_DiscardUnknown 

func (m *Glyphs) XXX_DiscardUnknown()

func (*Glyphs) XXX_Marshal 

func (m *Glyphs) XXX_Marshal(b []byte, deterministic bool) ([]byte, error)

func (*Glyphs) XXX_Merge 

func (m *Glyphs) XXX_Merge(src proto.Message)

func (*Glyphs) XXX_Size 

func (m *Glyphs) XXX_Size() int

func (*Glyphs) XXX_Unmarshal 

func (m *Glyphs) XXX_Unmarshal(b []byte) error

type SDFBuilder 

type SDFBuilder struct {
	Font *truetype.Font
	Face font.Face
	SDFBuilderOpt
	// contains filtered or unexported fields
}

func NewSDFBuilder 

func NewSDFBuilder(font *truetype.Font, opts ...SDFBuilderOpt) *SDFBuilder

func (*SDFBuilder) Glyph 

func (b *SDFBuilder) Glyph(x rune) *Glyph

func (*SDFBuilder) Glyphs 

func (b *SDFBuilder) Glyphs(min int, max int) *Glyphs

func (*SDFBuilder) Init 

func (b *SDFBuilder) Init()

type SDFBuilderOpt 

type SDFBuilderOpt struct {
	FontSize float64
	Buffer   float64
}

Source Files

View all Source files

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