Initial commit

internal/heic_enabled.go

@@ -0,0 +1,55 @@
+//go:build heic
+
+package internal
+
+
+import (
+	"bytes"
+	"image/jpeg"
+
+	"github.com/strukturag/libheif-go"
+)
+
+// convertHEICtoJPEG converts HEIC image data to JPEG format
+// Returns the converted JPEG data or an error if conversion fails
+// This version requires the libheif library and is enabled with the 'heic' build tag
+func convertHEICtoJPEG(heicData []byte) ([]byte, error) {
+	// Create a new HEIF context
+	ctx, err := libheif.NewContext()
+	if err != nil {
+		return nil, err
+	}
+
+	// Read HEIC data from memory
+	err = ctx.ReadFromMemory(heicData)
+	if err != nil {
+		return nil, err
+	}
+
+	// Get the primary image handle
+	handle, err := ctx.GetPrimaryImageHandle()
+	if err != nil {
+		return nil, err
+	}
+
+	// Decode the image to RGB format
+	img, err := handle.DecodeImage(libheif.ColorspaceRGB, libheif.ChromaInterleavedRGB, nil)
+	if err != nil {
+		return nil, err
+	}
+
+	// Convert to Go's standard image.Image
+	goImg, err := img.GetImage()
+	if err != nil {
+		return nil, err
+	}
+
+	// Encode as JPEG with high quality
+	var buf bytes.Buffer
+	err = jpeg.Encode(&buf, goImg, &jpeg.Options{Quality: 90})
+	if err != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}