Added --color-bg flag

aic_package/convert_gif.go

@@ -105,9 +105,9 @@ func pathIsGif(gifPath, urlImgName string, pathIsURl bool, urlImgBytes []byte, l
 
 			var asciiCharSet [][]imgManip.AsciiChar
 			if braille {
-				asciiCharSet = imgManip.ConvertToBrailleChars(imgSet, negative, colored, fontColor, threshold)
+				asciiCharSet = imgManip.ConvertToBrailleChars(imgSet, negative, colored, colorBg, fontColor, threshold)
 			} else {
-				asciiCharSet = imgManip.ConvertToAsciiChars(imgSet, negative, colored, complex, customMap, fontColor)
+				asciiCharSet = imgManip.ConvertToAsciiChars(imgSet, negative, colored, complex, colorBg, customMap, fontColor)
 			}
 			gifFramesSlice[i].asciiCharSet = asciiCharSet
 			gifFramesSlice[i].delay = originalGif.Delay[i]

aic_package/convert_image.go

@@ -51,9 +51,9 @@ func pathIsImage(imagePath, urlImgName string, pathIsURl bool, urlImgBytes []byt
 	var asciiSet [][]imgManip.AsciiChar
 
 	if braille {
-		asciiSet = imgManip.ConvertToBrailleChars(imgSet, negative, colored, fontColor, threshold)
+		asciiSet = imgManip.ConvertToBrailleChars(imgSet, negative, colored, colorBg, fontColor, threshold)
 	} else {
-		asciiSet = imgManip.ConvertToAsciiChars(imgSet, negative, colored, complex, customMap, fontColor)
+		asciiSet = imgManip.ConvertToAsciiChars(imgSet, negative, colored, complex, colorBg, customMap, fontColor)
 	}
 
 	// Save ascii art as .png image before printing it, if --save-img flag is passed

aic_package/convert_root.go

@@ -49,6 +49,7 @@ func DefaultFlags() Flags {
 		SaveGifPath:         "",
 		Negative:            false,
 		Colored:             false,
+		CharBackgroundColor: false,
 		Grayscale:           false,
 		CustomMap:           "",
 		FlipX:               false,
@@ -82,6 +83,7 @@ func Convert(filePath string, flags Flags) (string, error) {
 	saveGifPath = flags.SaveGifPath
 	negative = flags.Negative
 	colored = flags.Colored
+	colorBg = flags.CharBackgroundColor
 	grayscale = flags.Grayscale
 	customMap = flags.CustomMap
 	flipX = flags.FlipX

aic_package/vars.go

@@ -50,6 +50,10 @@ type Flags struct {
 	// This overrides Flags.Grayscale and Flags.FontColor
 	Colored bool
 
+	// If Flags.Colored, Flags.Grayscale or Flags.FontColor is set, use that color
+	// on each character's background in the terminal
+	CharBackgroundColor bool
+
 	// Keep grayscale colors from the original image. This uses the True color
 	// codes for the terminal and will work on saved .png and .gif files as well
 	// This overrides Flags.FontColor
@@ -103,6 +107,7 @@ var (
 	grayscale     bool
 	negative      bool
 	colored       bool
+	colorBg       bool
 	customMap     string
 	flipX         bool
 	flipY         bool

cmd/root.go

@@ -40,6 +40,7 @@ var (
 	negative      bool
 	formatsTrue   bool
 	colored       bool
+	colorBg       bool
 	grayscale     bool
 	customMap     string
 	flipX         bool
@@ -55,7 +56,7 @@ var (
 	rootCmd = &cobra.Command{
 		Use:     "ascii-image-converter [image paths/urls]",
 		Short:   "Converts images and gifs into ascii art",
-		Version: "1.7.1",
+		Version: "1.8.0",
 		Long:    "This tool converts images into ascii art and prints them on the terminal.\nFurther configuration can be managed with flags.",
 
 		// Not RunE since help text is getting larger and seeing it for every error impacts user experience
@@ -75,6 +76,7 @@ var (
 				SaveGifPath:         saveGifPath,
 				Negative:            negative,
 				Colored:             colored,
+				CharBackgroundColor: colorBg,
 				Grayscale:           grayscale,
 				CustomMap:           customMap,
 				FlipX:               flipX,
@@ -124,6 +126,7 @@ func init() {
 
 	// rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.ascii-image-converter.yaml)")
 	rootCmd.PersistentFlags().BoolVarP(&colored, "color", "C", false, "Display ascii art with original colors\n(Inverts with --negative flag)\n(Overrides --grayscale and --font-color flags)\n")
+	rootCmd.PersistentFlags().BoolVar(&colorBg, "color-bg", false, "If some color flag is passed, use that color\non character background instead of foreground\n(Inverts with --negative flag)\n(Doesn't work for --save-img or --save-gif)\n")
 	rootCmd.PersistentFlags().IntSliceVarP(&dimensions, "dimensions", "d", nil, "Set width and height for ascii art in CHARACTER length\ne.g. -d 60,30 (defaults to terminal height)\n(Overrides --width and --height flags)\n")
 	rootCmd.PersistentFlags().IntVarP(&width, "width", "W", 0, "Set width for ascii art in CHARACTER length\nHeight is kept to aspect ratio\ne.g. -W 60\n")
 	rootCmd.PersistentFlags().IntVarP(&height, "height", "H", 0, "Set height for ascii art in CHARACTER length\nWidth is kept to aspect ratio\ne.g. -H 60\n")

image_manipulation/ascii_conversions.go

@@ -55,7 +55,7 @@ to a 2D image_conversions.AsciiChar slice
 If complex parameter is true, values are compared to 70 levels of color density in ASCII characters.
 Otherwise, values are compared to 10 levels of color density in ASCII characters.
 */
-func ConvertToAsciiChars(imgSet [][]AsciiPixel, negative, colored, complex bool, customMap string, fontColor [3]int) [][]AsciiChar {
+func ConvertToAsciiChars(imgSet [][]AsciiPixel, negative, colored, complex, colorBg bool, customMap string, fontColor [3]int) [][]AsciiChar {
 
 	height := len(imgSet)
 	width := len(imgSet[0])
@@ -134,19 +134,26 @@ func ConvertToAsciiChars(imgSet [][]AsciiPixel, negative, colored, complex bool,
 
 			var char AsciiChar
 
-			char.OriginalColor = color.Sprintf("<fg="+rStr+","+gStr+","+bStr+">%v</>", chosenTable[tempInt])
+			char.Simple = chosenTable[tempInt]
+			if colorBg {
+				char.OriginalColor = color.Sprintf("<bg="+rStr+","+gStr+","+bStr+">%v</>", chosenTable[tempInt])
+			} else {
+				char.OriginalColor = color.Sprintf("<fg="+rStr+","+gStr+","+bStr+">%v</>", chosenTable[tempInt])
+			}
 
 			// If font color is not set, use a simple string. Otherwise, use True color
 			if fontColor != [3]int{255, 255, 255} {
 				fcR := strconv.Itoa(fontColor[0])
 				fcG := strconv.Itoa(fontColor[1])
 				fcB := strconv.Itoa(fontColor[2])
 
-				char.SetColor = color.Sprintf("<fg="+fcR+","+fcG+","+fcB+">%v</>", chosenTable[tempInt])
+				if colorBg {
+					char.SetColor = color.Sprintf("<bg="+fcR+","+fcG+","+fcB+">%v</>", chosenTable[tempInt])
+				} else {
+					char.SetColor = color.Sprintf("<fg="+fcR+","+fcG+","+fcB+">%v</>", chosenTable[tempInt])
+				}
 			}
 
-			char.Simple = chosenTable[tempInt]
-
 			if colored {
 				char.RgbValue = imgSet[i][j].rgbValue
 			} else {
@@ -167,7 +174,7 @@ to a 2D image_conversions.AsciiChar slice
 
 Unlike ConvertToAsciiChars(), this function calculates braille characters instead of ascii
 */
-func ConvertToBrailleChars(imgSet [][]AsciiPixel, negative, colored bool, fontColor [3]int, threshold int) [][]AsciiChar {
+func ConvertToBrailleChars(imgSet [][]AsciiPixel, negative, colored, colorBg bool, fontColor [3]int, threshold int) [][]AsciiChar {
 
 	BrailleThreshold = uint32(threshold)
 
@@ -216,15 +223,23 @@ func ConvertToBrailleChars(imgSet [][]AsciiPixel, negative, colored bool, fontCo
 			var char AsciiChar
 
 			char.Simple = brailleChar
-			char.OriginalColor = color.Sprintf("<fg="+rStr+","+gStr+","+bStr+">%v</>", brailleChar)
+			if colorBg {
+				char.OriginalColor = color.Sprintf("<bg="+rStr+","+gStr+","+bStr+">%v</>", brailleChar)
+			} else {
+				char.OriginalColor = color.Sprintf("<fg="+rStr+","+gStr+","+bStr+">%v</>", brailleChar)
+			}
 
 			// If font color is not set, use a simple string. Otherwise, use True color
 			if fontColor != [3]int{255, 255, 255} {
 				fcR := strconv.Itoa(fontColor[0])
 				fcG := strconv.Itoa(fontColor[1])
 				fcB := strconv.Itoa(fontColor[2])
 
-				char.SetColor = color.Sprintf("<fg="+fcR+","+fcG+","+fcB+">%v</>", brailleChar)
+				if colorBg {
+					char.SetColor = color.Sprintf("<bg="+fcR+","+fcG+","+fcB+">%v</>", brailleChar)
+				} else {
+					char.SetColor = color.Sprintf("<fg="+fcR+","+fcG+","+fcB+">%v</>", brailleChar)
+				}
 			}
 
 			if colored {

snapcraft.yaml

@@ -1,6 +1,6 @@
 name: ascii-image-converter
 base: core18 
-version: "1.7.1"
+version: "1.8.0"
 summary: Convert images and gifs into ascii art
 description: |
   ascii-image-converter is a command-line tool that converts images into ascii art and prints