diff options
Diffstat (limited to 'pic/pic.go')
| -rw-r--r-- | pic/pic.go | 30 |
1 files changed, 22 insertions, 8 deletions
@@ -1,18 +1,27 @@ -// Copyright 2011 The Go Authors. All rights reserved. +// Copyright 2011 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +// Package pic mengimplementasikan fungsi untuk menampilkan gambar di +// Go Playground. package pic // import "github.com/golang-id/tour/pic" import ( - "bytes" + "bufio" "encoding/base64" - "fmt" "image" "image/png" + "io" + "os" ) -func Show(f func(int, int) [][]uint8) { +// Show menampilkan gambar dari fungsi f saat di eksekusi di Go Playground. +// +// f mengembalikan sebuah slice dengan panjang dy, setiap elemen dari slice +// tersebut adalah sebuah slice dx, 8-bit unsigned int. +// Nilai integer diinterpretasikan sebagai nilai rentang warna biru, yang +// mana nilai 0 berarti biru, dan 255 berwarna putih. +func Show(f func(dx, dy int) [][]uint8) { const ( dx = 256 dy = 256 @@ -32,12 +41,17 @@ func Show(f func(int, int) [][]uint8) { ShowImage(m) } +// ShowImage displays the image m +// when executed on the Go Playground. func ShowImage(m image.Image) { - var buf bytes.Buffer - err := png.Encode(&buf, m) + w := bufio.NewWriter(os.Stdout) + defer w.Flush() + io.WriteString(w, "IMAGE:") + b64 := base64.NewEncoder(base64.StdEncoding, w) + err := (&png.Encoder{CompressionLevel: png.BestCompression}).Encode(b64, m) if err != nil { panic(err) } - enc := base64.StdEncoding.EncodeToString(buf.Bytes()) - fmt.Println("IMAGE:" + enc) + b64.Close() + io.WriteString(w, "\n") } |