add truecolor support

README.md

@@ -1,11 +1,14 @@
 # FIGlet for Go
 
-`figlet4go` is a go library forked from [getwe/figlet4go](https://github.com/getwe/figlet4go) which is a port of [FIGlet](http://www.figlet.org/) to Golang.  
+[![Go Report Card](https://goreportcard.com/badge/github.com/probandula/figlet4go)](https://goreportcard.com/report/github.com/probandula/figlet4go)
+
+`figlet4go` is a go library forked from  which is a port of [FIGlet](http://www.figlet.org/) to Golang.  
 With `figlet4go` it's easy to create **ascii text banners** in the command-line or with the given api.
 
 ![screenshot](./screenshot/figlet4go.png)
 
-[![Go Report Card](https://goreportcard.com/badge/github.com/probandula/figlet4go)](https://goreportcard.com/report/github.com/probandula/figlet4go)
+
+**This Repository used to be a fork of [getwe/figlet4go](https://github.com/getwe/figlet4go), but changed so much that it's not compatible anymore**
 
 ## Installation
 
@@ -38,10 +41,10 @@ fmt.Print(renderStr)
 ```
 
 ### Colored
-The colors given in the `[]color.Attribute` slice are repeating if the string is longer than the slice. You have to call the `RenderOpts` instead of the `Render` method to give the Renderer the Options.
+The colors given in the `[]figlet4go.Color` slice are repeating if the string is longer than the slice. You have to call the `RenderOpts` instead of the `Render` method to give the Renderer the Options.  
+If you use a `TrueColor` color, you have to ensure that your [terminal supports](https://gist.github.com/XVilka/8346728/) it.
 ```go
 import "github.com/probandula/figlet4go"
-import "github.com/fatih/color"
 
 // ...
 
@@ -49,10 +52,15 @@ ascii := figlet4go.NewAsciiRender()
 
 // Adding the colors to RenderOptions
 options := figlet4go.NewRenderOptions()
-options.FontColor = []color.Attribute{
-	color.FgGreen,
-	color.FgYellow,
-	color.FgCyan,
+options.FontColor = []figlet4go.Color{
+	// Colors can be given by default ansi color codes...
+	figlet4go.ColorGreen,
+	figlet4go.ColorYellow,
+	figlet4go.ColorCyan,
+	// ...or by an hex string...
+	figlet4go.GetTrueColorFromHexString("885DBA"),
+	// ...or by an TrueColor object with rgb values
+	figlet4go.TrueColor{136, 93, 186},
 }
 
 renderStr, _ := ascii.RenderOpts("Hello Colors", options)
@@ -67,7 +75,6 @@ import "github.com/probandula/figlet4go"
 
 // ...
 
-
 ascii := figlet4go.NewAsciiRender()
 
 options := figlet4go.NewRenderOptions()
@@ -76,7 +83,7 @@ options.FontName = "larry3d"
 // If 'larry3d' wouldn't be included you would have to load your .flf files like that:
 ascii.LoadFont("/path/to/fonts/")
 
-renderStr, _ := ascii.RenderOpts("Hello Colors", options)
+renderStr, _ := ascii.RenderOpts("Hello Fonts", options)
 fmt.Print(renderStr)
 ```
 
@@ -98,7 +105,10 @@ Other fonts can mainly be found on [figlet](http://www.figlet.org). You have to
 
 ## Todo
 - [x] Cli client
-- [ ] automatic the perfect char margin
+- [ ] automatically the perfect char margin
 - [ ] Linebreak possible?
 - [x] Colors in the cli client
-- [ ] No dependencies (fatih/color)
+- [x] No dependencies (fatih/color)
+- [x] Truecolor support
+- [ ] More parsers (HTML)
+- [ ] Tests

char.go

@@ -2,7 +2,6 @@ package figlet4go
 
 import (
 	"errors"
-	"github.com/fatih/color"
 )
 
 // Represents a single ascii character
@@ -10,7 +9,7 @@ type asciiChar struct {
 	// Slice with the lines of the Char
 	Lines []string
 	// Color of the char
-	Color color.Attribute
+	Color Color
 }
 
 // Creates a new ascii character
@@ -28,9 +27,13 @@ func newAsciiChar(font *font, char rune) (*asciiChar, error) {
 
 // Return a line of the char as string with color if set
 func (char *asciiChar) GetLine(index int) string {
-	if char.Color != 0 {
-		colorFunc := color.New(char.Color).SprintFunc()
-		return colorFunc(char.Lines[index])
+	prefix := ""
+	suffix := ""
+
+	if char.Color != nil {
+		prefix = char.Color.getPrefix()
+		suffix = char.Color.getSuffix()
 	}
-	return char.Lines[index]
+
+	return prefix + char.Lines[index] + suffix
 }

cmd/figlet4go/figlet4go.go

@@ -3,7 +3,6 @@ package main
 import (
 	"flag"
 	"fmt"
-	"github.com/fatih/color"
 	"github.com/probandula/figlet4go"
 	"log"
 	"os"
@@ -14,7 +13,7 @@ var (
 	str      *string = flag.String("str", "", "String to be converted with FIGlet")
 	font     *string = flag.String("font", "", "Font name to use")
 	fontpath *string = flag.String("fontpath", "", "Font path to load fonts from")
-	colors   *string = flag.String("colors", "", "Character colors separated by ';'\n\tPossible colors: black, red, green, yellow, blue, magenta, cyan, white")
+	colors   *string = flag.String("colors", "", "Character colors separated by ';'\n\tPossible colors: black, red, green, yellow, blue, magenta, cyan, white, or any hexcode (f.e. '885DBA')")
 )
 
 func main() {
@@ -52,30 +51,37 @@ func main() {
 
 // Get a slice with colors to give to the RenderOptions
 // Splits the given string with the separator ";"
-func getColorSlice(colorStr string) []color.Attribute {
+func getColorSlice(colorStr string) []figlet4go.Color {
 
 	givenColors := strings.Split(colorStr, ";")
 
-	colors := make([]color.Attribute, len(givenColors))
+	colors := make([]figlet4go.Color, len(givenColors))
 
 	for i, c := range givenColors {
 		switch c {
 		case "black":
-			colors[i] = color.FgBlack
+			colors[i] = figlet4go.ColorBlack
 		case "red":
-			colors[i] = color.FgRed
+			colors[i] = figlet4go.ColorRed
 		case "green":
-			colors[i] = color.FgGreen
+			colors[i] = figlet4go.ColorGreen
 		case "yellow":
-			colors[i] = color.FgYellow
+			colors[i] = figlet4go.ColorYellow
 		case "blue":
-			colors[i] = color.FgBlue
+			colors[i] = figlet4go.ColorBlue
 		case "magenta":
-			colors[i] = color.FgMagenta
+			colors[i] = figlet4go.ColorMagenta
 		case "cyan":
-			colors[i] = color.FgCyan
+			colors[i] = figlet4go.ColorCyan
 		case "white":
-			colors[i] = color.FgWhite
+			colors[i] = figlet4go.ColorWhite
+		default:
+			// Try to parse the TrueColor from the string
+			color, err := figlet4go.GetTrueColorFromHexString(c)
+			if err != nil {
+				log.Fatal(err)
+			}
+			colors[i] = color
 		}
 	}
 

color.go

@@ -0,0 +1,73 @@
+package figlet4go
+
+import (
+	"fmt"
+	"errors"
+	"encoding/hex"
+)
+
+// Escape char
+const escape string = "\x1b"
+
+var (
+	ColorBlack   AnsiColor = AnsiColor{30}
+	ColorRed     AnsiColor = AnsiColor{31}
+	ColorGreen   AnsiColor = AnsiColor{32}
+	ColorYellow  AnsiColor = AnsiColor{33}
+	ColorBlue    AnsiColor = AnsiColor{34}
+	ColorMagenta AnsiColor = AnsiColor{35}
+	ColorCyan    AnsiColor = AnsiColor{36}
+	ColorWhite   AnsiColor = AnsiColor{37}
+)
+
+// Every color has a pre- and a suffix
+type Color interface {
+	getPrefix() string
+	getSuffix() string
+}
+
+// Ansi color
+type AnsiColor struct {
+	code int
+}
+
+// Truecolor with rgb Attributes
+type TrueColor struct {
+	r int
+	g int
+	b int
+}
+
+// Prefix for ansi color
+func (tc TrueColor) getPrefix() string {
+	return fmt.Sprintf("%v[38;2;%d;%d;%dm", escape, tc.r, tc.g, tc.b)
+}
+
+// Suffix for ansi color
+func (tc TrueColor) getSuffix() string {
+	return fmt.Sprintf("%v[0m", escape)
+}
+
+func GetTrueColorFromHexString(c string) (*TrueColor, error) {
+	rgb, err := hex.DecodeString(c)
+	if err != nil {
+		return nil, errors.New("Invalid color given (" + c + ")")
+	}
+
+	return &TrueColor{
+		int(rgb[0]),
+		int(rgb[1]),
+		int(rgb[2]),
+	}, nil
+}
+
+
+// Prefix for ansi color
+func (ac AnsiColor) getPrefix() string {
+	return fmt.Sprintf("%v[0;%dm", escape, ac.code)
+}
+
+// Suffix for ansi color
+func (ac AnsiColor) getSuffix() string {
+	return fmt.Sprintf("%v[0m", escape)
+}

render.go

@@ -1,16 +1,12 @@
 package figlet4go
 
-import (
-	"github.com/fatih/color"
-)
-
 // RenderOptions are used to set color or maybe future
 // options to the AsciiRenderer
 type RenderOptions struct {
 	// Name of the used font
 	FontName string
 	// Colors of the font
-	FontColor []color.Attribute
+	FontColor []Color
 }
 
 // NewRenderOptions creates new RenderOptions