141 lines
3.9 KiB
Go
141 lines
3.9 KiB
Go
/*
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Copyright © 2021 Zoraiz Hassan <hzoraiz8@gmail.com>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package cmd
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import (
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"fmt"
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"image"
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"io/ioutil"
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"os"
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"strings"
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imgMani "github.com/TheZoraiz/ascii-image-converter/image_manipulation"
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"github.com/spf13/cobra"
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homedir "github.com/mitchellh/go-homedir"
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"github.com/spf13/viper"
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)
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var (
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cfgFile string
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compl bool
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dimensions []int
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save bool
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rootCmd = &cobra.Command{
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Use: "ascii-image-converter [image path]",
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Short: "Converts images into ascii format",
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Long: `ascii-image-converter converts images into ascii format and prints them onto the terminal window. Further configuration can be managed with flags`,
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Args: cobra.ExactArgs(1),
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RunE: func(cmd *cobra.Command, args []string) error {
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numberOfDimensions := len(dimensions)
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if dimensions != nil && numberOfDimensions != 2 {
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return fmt.Errorf("-d requires two dimensions got %v", numberOfDimensions)
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}
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imagePath := args[0]
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return convertPicture(imagePath, compl, dimensions, save)
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},
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}
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)
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func convertPicture(imagePath string, isComplex bool, dimensions []int, save bool) error {
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pic, err := os.Open(imagePath)
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if err != nil {
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return fmt.Errorf("Unable to open file: %w", err)
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}
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defer pic.Close()
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imData, _, err := image.Decode(pic)
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if err != nil {
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return fmt.Errorf("Unable to decode file: %w", err)
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}
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imgSet := imgMani.ConvertToTerminalSizedSlices(imData, dimensions)
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var asciiSet [][]string
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if isComplex {
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asciiSet = imgMani.ConvertToAsciiDetailed(imgSet)
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} else {
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asciiSet = imgMani.ConvertToAsciiSimple(imgSet)
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}
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ascii := flattenAscii(asciiSet)
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for _, line := range ascii {
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fmt.Println(line)
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}
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if save {
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return ioutil.WriteFile("ascii-image.txt", []byte(strings.Join(ascii, "\n")), 0777)
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}
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return nil
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}
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// flattenAscii flattens a two-dimensional grid of ascii characters into a one dimension
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// of lines of ascii
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func flattenAscii(asciiSet [][]string) []string {
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var ascii []string
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for _, line := range asciiSet {
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ascii = append(ascii, strings.Join(line, ""))
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}
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return ascii
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}
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// Cobra configuration from here on
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func Execute() {
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if err := rootCmd.Execute(); err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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}
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func init() {
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cobra.OnInitialize(initConfig)
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rootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.ascii-image-converter.yaml)")
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rootCmd.PersistentFlags().BoolVarP(&compl, "complex", "c", false, "Prints ascii characters in a larger range, may result in higher quality")
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rootCmd.PersistentFlags().IntSliceVarP(&dimensions, "dimensions", "d", nil, "Set width and height for ascii art in CHARACTER length e.g. 100,30 (defaults to terminal size)")
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rootCmd.PersistentFlags().BoolVarP(&save, "save", "S", false, "Save ascii text in current directory in an ascii-image.txt file")
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}
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// initConfig reads in config file and ENV variables if set.
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func initConfig() {
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if cfgFile != "" {
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// Use config file from the flag.
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viper.SetConfigFile(cfgFile)
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} else {
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// Find home directory.
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home, err := homedir.Dir()
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if err != nil {
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fmt.Println(err)
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os.Exit(1)
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}
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// Search config in home directory with name ".ascii-image-converter" (without extension).
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viper.AddConfigPath(home)
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viper.SetConfigName(".ascii-image-converter")
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}
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viper.AutomaticEnv() // read in environment variables that match
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// If a config file is found, read it in.
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if err := viper.ReadInConfig(); err == nil {
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fmt.Println("Using config file:", viper.ConfigFileUsed())
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}
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}
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