code review 6866051: tiff: support for writing compressed images.

tiff/writer_test.go

 // Copyright 2012 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 tiff
 
 import (
         "bytes"
         "image"
         "io/ioutil"
         "os"
         "testing"
 )
 
 var roundtripTests = []struct {
         filename string
         opts     *Options
 }{
         {"video-001.tiff", nil},
         {"bw-packbits.tiff", nil},
         {"video-001.tiff", &Options{Predictor: true}},
+        {"video-001.tiff", &Options{Compression: Deflate}},
+        {"video-001.tiff", &Options{Predictor: true, Compression: Deflate}},
 }
 
 func openImage(filename string) (image.Image, error) {
         f, err := os.Open(testdataDir + filename)
         if err != nil {
                 return nil, err
         }
         defer f.Close()
         return Decode(f)
 }
@@ skipping 42 matching lines @@
         if err != nil {
                 b.Fatal(err)
         }
         s := img.Bounds().Size()
         b.SetBytes(int64(s.X * s.Y * 4))
         b.ResetTimer()
         for i := 0; i < b.N; i++ {
                 Encode(ioutil.Discard, img, nil)
         }
 }