diff options
Diffstat (limited to 'pic/pic.go')
| -rw-r--r-- | pic/pic.go | 17 |
1 files changed, 15 insertions, 2 deletions
@@ -1,7 +1,9 @@ -// 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 implements functions that +// display pictures on the Go playground. package pic // import "golang.org/x/tour/pic" import ( @@ -12,7 +14,16 @@ import ( "image/png" ) -func Show(f func(int, int) [][]uint8) { +// Show displays a picture defined by the function f +// when executed on the Go Playground. +// +// f should return a slice of length dy, +// each element of which is a slice of dx +// 8-bit unsigned int. The integers are +// interpreted as bluescale values, +// where the value 0 means full blue, +// and the value 255 means full white. +func Show(f func(dx, dy int) [][]uint8) { const ( dx = 256 dy = 256 @@ -32,6 +43,8 @@ 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) |