glfont下載 - glfont源代碼下載

glfont

字體下載

1.0.0

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 Name    : glfont Library                      
Author  : Noah Shibley, http://socialhardware.net                       
Date    : June 16th 2016                                 
Notes   : A modern opengl text rendering library for golang
Dependencies:   freetype, go-gl, glfw

功能列表：

func loadfont

 func LoadFont ( file string , scale int32 , windowWidth int , windowHeight int ) ( * Font , error )

LoadFont以給定的比例加載指定的字體。默認字符集為ASCII（編碼點32至127）。

Func LoadTruetyPefont

 func LoadTrueTypeFont ( program uint32 , r io. Reader , scale int32 , low , high rune , dir Direction ) ( * Font , error )

LOADTRUETYPEFONT基於TTF文件Gylphs構建緩衝區和紋理。

func loadfontbytes

 func LoadFontBytes ( buf [] byte , scale int32 , windowWidth int , windowHeight int ) ( * Font , error ) {

LoadFontBytes直接從字節（例如goregulat.TTF ，https：//pkg.go.dev/golang.org.org/image/image/font/gofont/goregular/goregular）加載字體。默認字符集為ASCII（編碼點32至127）。

func（*font）generategplyphs

 func ( f * Font ) GenerateGlyphs ( low , high rune ) error

GenerateGlyphs為非ASCII Unicode Codepoint構建了其他字形。

func（*font）printf

 func ( f * Font ) Printf ( x , y float32 , scale float32 , fs string , argv ... interface {}) error

printf在屏幕上繪製字符串，獲取諸如printf之類的參數列表

func（*font）setColor

 func ( f * Font ) SetColor ( red float32 , green float32 , blue float32 , alpha float32 )

SetColor允許您在繪製文本時設置文本顏色

FUNC（f *font）更新物質

 func ( f * Font ) UpdateResolution ( windowWidth int , windowHeight int )

調整視口大大時需要更新

func（f *font）寬度

 func ( f * Font ) Width ( scale float32 , fs string , argv ... interface {}) float32

寬度返回像素中的文本的寬度

例子：

 package main

import (
	"fmt"
	"log"
	"runtime"

	"github.com/go-gl/gl/all-core/gl"
	"github.com/go-gl/glfw/v3.1/glfw"
	"github.com/nullboundary/glfont"
)

const windowWidth = 1920
const windowHeight = 1080

func init () {
	runtime . LockOSThread ()
}

func main () {

	if err := glfw . Init (); err != nil {
		log . Fatalln ( "failed to initialize glfw:" , err )
	}
	defer glfw . Terminate ()

	glfw . WindowHint ( glfw . Resizable , glfw . True )
	glfw . WindowHint ( glfw . ContextVersionMajor , 3 )
	glfw . WindowHint ( glfw . ContextVersionMinor , 2 )
	glfw . WindowHint ( glfw . OpenGLProfile , glfw . OpenGLCoreProfile )
	glfw . WindowHint ( glfw . OpenGLForwardCompatible , glfw . True )

	window , _ := glfw . CreateWindow ( int ( windowWidth ), int ( windowHeight ), "glfontExample" , glfw . GetPrimaryMonitor (), nil )

	window . MakeContextCurrent ()
	glfw . SwapInterval ( 1 )
	
	if err := gl . Init (); err != nil { 
		panic ( err )
	}

	//load font (fontfile, font scale, window width, window height
	font , err := glfont . LoadFont ( "Roboto-Light.ttf" , int32 ( 52 ), windowWidth , windowHeight )
	if err != nil {
		log . Panicf ( "LoadFont: %v" , err )
	}

	gl . Enable ( gl . DEPTH_TEST )
	gl . DepthFunc ( gl . LESS )
	gl . ClearColor ( 0.0 , 0.0 , 0.0 , 0.0 )

	for ! window . ShouldClose () {
		gl . Clear ( gl . COLOR_BUFFER_BIT | gl . DEPTH_BUFFER_BIT )

     //set color and draw text
		font . SetColor ( 1.0 , 1.0 , 1.0 , 1.0 ) //r,g,b,a font color
		font . Printf ( 100 , 100 , 1.0 , "Lorem ipsum dolor sit amet, consectetur adipiscing elit." ) //x,y,scale,string,printf args

		window . SwapBuffers ()
		glfw . PollEvents ()

	}
}