freetype

README

FreeType renderer

An implementation of the Renderer interface in the github.com/pekim/dull/internal/font/ package, using the FreeType library.

cgo is used to build freetype from source.

structure

• cgo.go - provides compiler flags
• renderer.go - implementation of the Renderer interface using FreeType
• *.go - all other Go files simply use cgo to build a C file from the library source
  • filename - reflects a path in the library source, with /s replaced with _
• lib - the directory contains an extracted source tarball

upgrade FreeType version

• download a tarball from https://download.savannah.gnu.org/releases/freetype/
• extract in to the lib dir

Documentation

Index

• func NewRenderer(name string, fontData []byte, dpi int, height float64) (font.Renderer, error)
• type FreeType
  • func NewFreeType(dpi int) *FreeType
  • func (ft *FreeType) NewRenderer(name string, fontData []byte, pixelHeight float64) (font.Renderer, error)
• type RendererFreeType
  • func (r *RendererFreeType) GetGlyph(char rune) (*font.Glyph, error)
  • func (r *RendererFreeType) GetMetrics() *font.Metrics
  • func (r *RendererFreeType) GetName() string

Functions

func NewRenderer

func NewRenderer(name string, fontData []byte, dpi int, height float64) (font.Renderer, error)

Types

type FreeType

type FreeType struct {
	// contains filtered or unexported fields
}

func NewFreeType

func NewFreeType(dpi int) *FreeType

func (*FreeType) NewRenderer

func (ft *FreeType) NewRenderer(name string, fontData []byte, pixelHeight float64) (font.Renderer, error)

type RendererFreeType

type RendererFreeType struct {
	// contains filtered or unexported fields
}

func (*RendererFreeType) GetGlyph

func (r *RendererFreeType) GetGlyph(char rune) (*font.Glyph, error)

func (*RendererFreeType) GetMetrics

func (r *RendererFreeType) GetMetrics() *font.Metrics

func (*RendererFreeType) GetName

func (r *RendererFreeType) GetName() string