Initial commit

image.go

@@ -0,0 +1,91 @@
+package main
+
+import (
+	"fmt"
+	"image"
+	"image/gif"
+	"image/jpeg"
+	"image/png"
+	"os"
+
+	"github.com/biessek/golang-ico"
+	"github.com/gen2brain/avif"
+	"github.com/gen2brain/jpegxl"
+	"github.com/gen2brain/webp"
+	"golang.org/x/image/bmp"
+	"golang.org/x/image/tiff"
+)
+
+var (
+	options = map[string]string{
+		"c / colors":      "Number of colors (1-256) (gif)",
+		"e / effort":      "Encoder effort level (0-10) (jxl)",
+		"f / format":      "Output format (avif, bmp, gif, jpeg, jxl, png, tiff, webp)",
+		"h / help":        "Show this help page",
+		"l / lossless":    "Use lossless compression (webp)",
+		"m / method":      "Encoder method (0=fast, 6=slower-better) (webp)",
+		"r / ratio":       "YCbCr subsample-ratio (0=444, 1=422, 2=420, 3=440, 4=411, 5=410) (avif)",
+		"s / silent":      "Do not print any output",
+		"q / quality":     "Set quality (0-100) (avif, jpeg, jxl, webp)",
+		"x / exact":       "Preserve RGB values in transparent area (webp)",
+		"z / compression": "Compression type (0=uncompressed, 1=deflate, 2=lzw, 3=ccittgroup3, 4=ccittgroup4) (tiff)",
+	}
+)
+
+func ReadImage(input *os.File) (image.Image, error) {
+	decoder, err := GetDecoderFromContent(input)
+	if err != nil {
+		return nil, err
+	}
+
+	return decoder(input)
+}
+
+func WriteImage(output *os.File, img image.Image, format string) error {
+	switch format {
+	case "webp":
+		options := GetWebPOptions()
+
+		LogWebPOptions(options)
+
+		return webp.Encode(output, img, options)
+	case "jpeg":
+		options := GetJpegOptions()
+
+		LogJpegOptions(options)
+
+		return jpeg.Encode(output, img, options)
+	case "png":
+		return png.Encode(output, img)
+	case "gif":
+		options := GetGifOptions()
+
+		LogGifOptions(options)
+
+		return gif.Encode(output, img, options)
+	case "bmp":
+		return bmp.Encode(output, img)
+	case "tiff":
+		options := GetTiffOptions()
+
+		LogTiffOptions(options)
+
+		return tiff.Encode(output, img, options)
+	case "avif":
+		options := GetAvifOptions()
+
+		LogAvifOptions(options)
+
+		return avif.Encode(output, img, options)
+	case "jxl":
+		options := GetJxlOptions()
+
+		LogJxlOptions(options)
+
+		jpegxl.Encode(output, img, options)
+	case "ico":
+		return ico.Encode(output, img)
+	}
+
+	return fmt.Errorf("unsupported output format: %s", format)
+}