mtsatellite/common/image.go

// Copyright 2014 by Sascha L. Teichmann
// Use of this source code is governed by the MIT license
// that can be found in the LICENSE file.

package common

import (
	"bufio"
	"image"
	"image/png"
	"log"
	"os"
)

func SaveAsPNG(path string, img image.Image) (err error) {
	var file *os.File
	if file, err = os.Create(path); err != nil {
		return
	}
	writer := bufio.NewWriter(file)
	err = png.Encode(writer, img)
	writer.Flush()
	file.Close()
	return
}

func LoadPNG(path string) image.Image {
	var err error
	var file *os.File
	if file, err = os.Open(path); err != nil {
		//log.Printf("WARN: %s", err)
		return image.White
	}
	defer file.Close()
	reader := bufio.NewReader(file)
	var img image.Image
	if img, err = png.Decode(reader); err != nil {
		log.Printf("WARN: %s", err)
		return image.White
	}
	return img
}