inital hs_zip.go commit

actual initial commit

hs_zip.go

@@ -0,0 +1,137 @@
+/*
+The MIT License (MIT)
+
+Copyright (c) 2015 David Schmidt ()
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+package main
+
+import (
+    "archive/zip"
+    "fmt"
+    "github.com/nfnt/resize"
+    "github.com/oliamb/cutter"
+    "image/jpeg"
+    "image/png"
+    "io"
+    "io/ioutil"
+    "os"
+    "time"
+)
+
+const (
+	TargetWidth = 1024
+	TargetHeight = 768
+)
+// 90% jpeg
+var JpegQuality *jpeg.Options = &jpeg.Options{ 90 }
+
+
+
+// read, resize, crop and zip a 'screenshot' named 'name' into 'zipArchive'
+func convert(zipFile *zip.Writer, infile io.Reader, filename string) error {
+    img, err := png.Decode(infile)
+    if err != nil {
+        return err
+    }
+
+    resized := resize.Resize(0, TargetHeight, img, resize.Bicubic)
+    croppedImg, _ := cutter.Crop(resized, cutter.Config{
+        Width: TargetWidth,
+        Height: TargetHeight,
+        Mode: cutter.Centered,
+    })
+
+    zippedFile, err := zipFile.Create(filename)
+    if err != nil {
+        return err
+    }
+
+    return jpeg.Encode(zippedFile, croppedImg, JpegQuality)
+}
+
+
+// find hearthstone screenshots in current directory
+func findScreenshots() []string {
+    screenshots := make([]string, 0, 8)
+    // get all files from current directory
+    files, err := ioutil.ReadDir("./")
+    if err != nil {
+        fmt.Printf("failed to read current directory - error: %v", err)
+        return screenshots
+    }
+
+    // filter Hearthstone*.png files
+    for _, file := range files {
+        if ! file.IsDir() &&
+                len(file.Name()) > 15 &&
+                file.Name()[:11] == "Hearthstone" &&
+                file.Name()[len(file.Name()) - 4:] == ".png" {
+            screenshots = append(screenshots, file.Name())
+        }
+    }
+
+    return screenshots
+}
+
+
+// main entry
+func main() {
+    // find screenshot file names
+    screenshots := findScreenshots()
+    if len(screenshots) == 0 {
+        fmt.Printf("\nno screenshots found")
+        return
+    }
+
+    // create zip archive file if there are screenshots
+    outfile, err := os.Create("Hearthstone Screenshots.zip")
+    if err != nil {
+        fmt.Printf("could not create zip file to write to - error: %v", err)
+        return
+    }
+    defer outfile.Close()
+
+    zipwriter := zip.NewWriter(outfile)
+    defer zipwriter.Close()
+
+    fmt.Printf("\nstart zippping: %s\n", time.Now().Format("15:04:05.999"))
+    // process all screenshots
+    for _, screenshot := range screenshots {
+        // try to open file
+        fmt.Printf("processing: %v\n", screenshot)
+        file, err := os.Open(screenshot)
+        if err != nil {
+            fmt.Printf("could not open file %v error: %v", screenshot, err)
+            return
+        }
+        defer file.Close()
+
+        jpegName := screenshot[:len(screenshot) - 4] + ".jpg"
+        // zip it as smaller jpeg
+        err = convert(zipwriter, file, jpegName)
+        if err != nil {
+            fmt.Printf("could not resize file %v error: %v", screenshot, err)
+            return
+        }
+    }
+    fmt.Printf("finished: %s", time.Now().Format("15:04:05.999"))
+}