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|
package main
import (
"flag"
"fmt"
"image/color"
"image/png"
"log"
"os"
"strings"
)
const (
format_separator = "::"
)
var (
threshold *int
outfile *string
infile *string
format_string *string
minBrightness *int
maxBrightness *int
imageWidth *int
imageHeight *int
advancedoptions *bool
)
func usage() {
fmt.Println("Usage: schemer2 [FLAGS] -format [INPUTFORMAT]" + format_separator + "[OUTPUTFORMAT] -in [INPUTFILE] -out [OUTPUTFILE]")
}
func flags_usage() {
usage()
fmt.Printf("\n\n") // Spacing
inputs_outputs()
fmt.Printf("\n\n") // Spacing
if !*advancedoptions {
fmt.Println("Run with -help-advanced flag to show advanced options")
} else {
flag.PrintDefaults()
}
}
func inputs_outputs() {
inSupport := "Input formats:\n"
outSupport := "Output formats:\n"
for _, f := range formats {
if f.output != nil {
outSupport += strings.Join([]string{" ", f.friendlyName, ":", f.flagName, "\n"}, " ")
}
if f.input != nil {
inSupport += strings.Join([]string{" ", f.friendlyName, ":", f.flagName, "\n"}, " ")
}
}
// Special case for img output
outSupport += " Image output : img\n"
fmt.Print(inSupport, "\n", outSupport)
}
func main() {
threshold = flag.Int("threshold", 50, "Threshold for minimum color difference (image input only)")
infile = flag.String("in", "", "Input file")
outfile = flag.String("out", "", "File to write output to.")
format_string = flag.String("format", "", "Format of input and output. Eg. 'image"+format_separator+"xterm'")
minBrightness = flag.Int("minBright", 0, "Minimum brightness for colors (image input only)")
maxBrightness = flag.Int("maxBright", 200, "Maximum brightness for colors (image input only)")
imageHeight = flag.Int("height", 1080, "Height of output image")
imageWidth = flag.Int("width", 1920, "Width of output image")
advancedoptions = flag.Bool("help-advanced", false, "Show advanced command line options")
flag.Usage = flags_usage
flag.Parse()
if *advancedoptions {
flags_usage()
os.Exit(1)
}
if *format_string == "" {
fmt.Println("Input and output format must be specified using '-format' flag.")
usage()
os.Exit(2)
}
if *infile == "" {
fmt.Println("Input file must be provided using '-in' flag.")
usage()
os.Exit(2)
}
if *minBrightness > 255 || *maxBrightness > 255 {
fmt.Print("Minimum and maximum brightness must be an integer between 0 and 255.\n")
os.Exit(2)
}
if *threshold > 255 {
fmt.Print("Threshold should be an integer between 0 and 255.\n")
os.Exit(2)
}
if *imageWidth < 100 || *imageHeight < 100 {
log.Fatal("Minimum resolution of image output is 100x100")
}
// Determine format and filenames
// And get colors from file using specified format
if len(strings.SplitN(*format_string, format_separator, 2)) < 2 {
fmt.Println("Invalid format string. Separate input and output formats with: '" + format_separator + "'")
usage()
os.Exit(2)
}
input_format := strings.SplitN(*format_string, format_separator, 2)[0]
output_format := strings.SplitN(*format_string, format_separator, 2)[1]
formatInMatch := false
var colors []color.Color
var err error
for _, f := range formats {
if input_format == f.flagName {
if f.input == nil {
fmt.Printf("Unrecognised input format: %v \n", input_format)
return
}
colors, err = f.input(*infile)
if err != nil {
fmt.Print(err, "\n")
return
}
formatInMatch = true
break
}
}
if !formatInMatch {
fmt.Printf("Did not recognise format %v. \n", input_format)
return
}
// Ensure there are 16 colors
if len(colors) > 16 {
colors = colors[:16]
} else if len(colors) < 16 {
// TODO: Should this just be a warning (for cases where only 8 colors are defined?)
log.Fatal("Less than 16 colors. Aborting.")
}
// Output the configuration for terminal, or image
if output_format != "img" {
formatOutMatch := false
for _, f := range formats {
if output_format == f.flagName {
if f.output == nil {
fmt.Printf("Unrecognised output format: %v \n", output_format)
return
}
result := f.output(colors)
// If outfile is specified, write output to file
// Otherwise, write to stdout.
// TODO: Make it abundantly clear that the output is *only* the colors
// and attempting to write directly to a config file will overwrite all other
// data in the config file.
if *outfile != "" {
file, err := os.OpenFile(*outfile, os.O_CREATE|os.O_WRONLY, 0666)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer file.Close()
err = file.Truncate(0)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Fprint(file, result)
} else {
fmt.Printf(result)
}
formatOutMatch = true
break
}
}
if !formatOutMatch {
fmt.Printf("Did not recognise format %v. \n", output_format)
}
} else {
var file *os.File
var err error
if *outfile == "" {
fmt.Println("Warning: Image output requested, yet no output file provided.")
fmt.Println("Writing image data to /tmp/schemer_out.png")
file, err = os.OpenFile("/tmp/schemer_out.png", os.O_CREATE|os.O_WRONLY, 0666)
} else {
file, err = os.OpenFile(*outfile, os.O_CREATE|os.O_WRONLY, 0666)
}
if err != nil {
log.Fatal(err)
}
defer file.Close()
img := imageFromColors(colors, *imageWidth, *imageHeight) // TODO
png.Encode(file, img)
}
}
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