init

.gitignore

@@ -0,0 +1,9 @@
+txt2img-demo
+logs/
+bin/
+.vscode/
+*.exe
+go.sum
+*.ttf
+*.jpg
+*.png

go.mod

@@ -0,0 +1,13 @@
+module myschools.me/suguo/txt2img
+
+go 1.17
+
+require (
+	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0
+	github.com/hqbobo/text2pic v0.0.0-20180823042751-2479e146d720
+)
+
+require (
+	github.com/nfnt/resize v0.0.0-20180221191011-83c6a9932646 // indirect
+	golang.org/x/image v0.0.0-20211028202545-6944b10bf410 // indirect
+)

main.go

@@ -0,0 +1,67 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/golang/freetype"
+	"github.com/hqbobo/text2pic"
+)
+
+func main() {
+
+	// Read the font data.
+	fontBytes, err := ioutil.ReadFile("NewYork.ttf")
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	//produce the fonttype
+	f, err := freetype.ParseFont(fontBytes)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	//define New picture with given width in px
+	//the height will be calucated before draw on picture
+	//picture will be resize to 80% of the width you given
+	pic := text2pic.NewTextPicture(text2pic.Configure{
+		Width: 720,
+	})
+
+	//add chinese line
+	pic.AddTextLine("1.这个是标题", 20, f, text2pic.ColorRed, text2pic.Padding{Left: 20, Top: 10, Bottom: 20})
+	pic.AddTextLine("    北京铁路局今天凌晨2时16分发布消息称：8月12日23时04分，aaaa京沪高铁廊坊至北京aaaaa南间发生设备故障，导致部分列车晚点。铁路部门及时启动应急预案处置时16分发布消息称时16分发布消息称北京铁路局今天凌晨2时16分发布消息称：8月12日23时04分，aaaa京沪高铁廊坊至北京aaaaa南间发生设备故障，导致部分列车晚点。铁路部门及时启动应急预案处置时16分发布消息称时16分发布消息称北京铁路局今天凌晨2时16分发布消息称：8月12日23时04分，aaaa京沪高铁廊坊至北京aaaaa南间发生设备故障，导致部分列车晚点。铁路部门及时启动应急预案处置时16分发布消息称时16分发布消息称", 12, f, text2pic.ColorGreen, text2pic.Padding{Left: 20, Right: 20, Bottom: 30})
+	//add picture
+	// file, err := os.Open("download.png")
+	// if err != nil {
+	// 	fmt.Println(err)
+	// }
+	// defer file.Close()
+
+	// pic.AddPictureLine(file, text2pic.Padding{Bottom: 20})
+
+	// //add full english text
+	// pic.AddTextLine("3.For English", 20, f, text2pic.ColorRed, text2pic.Padding{Bottom: 20})
+	// pic.AddTextLine(" The Turkish lira plunged as much as 11% against the dollar, hitting a record low, before recovering some of its losses in volatile trading. The lira had already plummeted more than 20% last week as a political clash with the United States intensified and investors fretted about the Turkish government's lack of action to tackle the problems plaguing its economy.  ", 13, f, text2pic.ColorBlue, text2pic.Padding{Left: 20, Right: 20, Bottom: 30})
+
+	// Save the output to file
+	outFile, err := os.Create("out.jpg")
+	if err != nil {
+		return
+	}
+	defer outFile.Close()
+	b := bufio.NewWriter(outFile)
+	//produce the output
+	pic.Draw(b, text2pic.TypeJpeg)
+	// pic.Draw(b, text2pic.TypePng)
+	e := b.Flush()
+	if e != nil {
+		fmt.Println(e)
+	}
+
+}

readme.md

@@ -0,0 +1,6 @@
+## 文字转换为图片示例
+
+---
+
+### 1. 组件
+  https://github.com/hqbobo/text2pic

simple/main.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"image"
+	"image/draw"
+	"image/png"
+	"io/ioutil"
+	"log"
+	"os"
+
+	"github.com/golang/freetype"
+)
+
+func main() {
+
+	// Read the font data.
+	fontBytes, err := ioutil.ReadFile("../NewYork.ttf")
+	if err != nil {
+		log.Println(err)
+		return
+	}
+	//produce the fonttype
+	f, err := freetype.ParseFont(fontBytes)
+	if err != nil {
+		log.Println(err)
+		return
+	}
+
+	fg, bg := image.Black, image.White
+	rgba := image.NewRGBA(image.Rect(0, 0, 640, 480))
+	draw.Draw(rgba, rgba.Bounds(), bg, image.ZP, draw.Src)
+
+	c := freetype.NewContext()
+	// 设置像素密度
+	c.SetDPI(140)
+	// 指定字体
+	c.SetFont(f)
+	// 指定字体大小
+	c.SetFontSize(140)
+	// 指定画布对象
+	c.SetDst(rgba)
+	// 指定画布绘制范围
+	c.SetClip(rgba.Bounds())
+	// 指定文字颜色
+	c.SetSrc(fg)
+
+	pt := freetype.Pt(10, 10+int(c.PointToFixed(140)>>6))
+	//add chinese line
+	c.DrawString("B", pt)
+	// Save the output to file
+	of, err := os.Create("out.png")
+	if err != nil {
+		fmt.Println(err.Error())
+	}
+	defer of.Close()
+	b := bufio.NewWriter(of)
+	if err := png.Encode(b, rgba); err != nil {
+		fmt.Println(err.Error())
+	}
+	if err := b.Flush(); err != nil {
+		fmt.Println(err.Error())
+	}
+
+}