diff options
Diffstat (limited to 'Godeps/_workspace/src/golang.org/x/image/tiff/reader_test.go')
| -rw-r--r-- | Godeps/_workspace/src/golang.org/x/image/tiff/reader_test.go | 377 |
1 files changed, 0 insertions, 377 deletions
diff --git a/Godeps/_workspace/src/golang.org/x/image/tiff/reader_test.go b/Godeps/_workspace/src/golang.org/x/image/tiff/reader_test.go deleted file mode 100644 index f5c02e697..000000000 --- a/Godeps/_workspace/src/golang.org/x/image/tiff/reader_test.go +++ /dev/null @@ -1,377 +0,0 @@ -// 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 tiff - -import ( - "bytes" - "encoding/binary" - "encoding/hex" - "errors" - "image" - "io/ioutil" - "os" - "strings" - "testing" - - _ "image/png" -) - -const testdataDir = "../testdata/" - -// Read makes *buffer implements io.Reader, so that we can pass one to Decode. -func (*buffer) Read([]byte) (int, error) { - panic("unimplemented") -} - -func load(name string) (image.Image, error) { - f, err := os.Open(testdataDir + name) - if err != nil { - return nil, err - } - defer f.Close() - img, _, err := image.Decode(f) - if err != nil { - return nil, err - } - return img, nil -} - -// TestNoRPS tests decoding an image that has no RowsPerStrip tag. The tag is -// mandatory according to the spec but some software omits it in the case of a -// single strip. -func TestNoRPS(t *testing.T) { - _, err := load("no_rps.tiff") - if err != nil { - t.Fatal(err) - } -} - -// TestNoCompression tests decoding an image that has no Compression tag. This -// tag is mandatory, but most tools interpret a missing value as no -// compression. -func TestNoCompression(t *testing.T) { - _, err := load("no_compress.tiff") - if err != nil { - t.Fatal(err) - } -} - -// TestUnpackBits tests the decoding of PackBits-encoded data. -func TestUnpackBits(t *testing.T) { - var unpackBitsTests = []struct { - compressed string - uncompressed string - }{{ - // Example data from Wikipedia. - "\xfe\xaa\x02\x80\x00\x2a\xfd\xaa\x03\x80\x00\x2a\x22\xf7\xaa", - "\xaa\xaa\xaa\x80\x00\x2a\xaa\xaa\xaa\xaa\x80\x00\x2a\x22\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa\xaa", - }} - for _, u := range unpackBitsTests { - buf, err := unpackBits(strings.NewReader(u.compressed)) - if err != nil { - t.Fatal(err) - } - if string(buf) != u.uncompressed { - t.Fatalf("unpackBits: want %x, got %x", u.uncompressed, buf) - } - } -} - -func TestShortBlockData(t *testing.T) { - b, err := ioutil.ReadFile("../testdata/bw-uncompressed.tiff") - if err != nil { - t.Fatal(err) - } - // The bw-uncompressed.tiff image is a 153x55 bi-level image. This is 1 bit - // per pixel, or 20 bytes per row, times 55 rows, or 1100 bytes of pixel - // data. 1100 in hex is 0x44c, or "\x4c\x04" in little-endian. We replace - // that byte count (StripByteCounts-tagged data) by something less than - // that, so that there is not enough pixel data. - old := []byte{0x4c, 0x04} - new := []byte{0x01, 0x01} - i := bytes.Index(b, old) - if i < 0 { - t.Fatal(`could not find "\x4c\x04" byte count`) - } - if bytes.Contains(b[i+len(old):], old) { - t.Fatal(`too many occurrences of "\x4c\x04"`) - } - b[i+0] = new[0] - b[i+1] = new[1] - if _, err = Decode(bytes.NewReader(b)); err == nil { - t.Fatal("got nil error, want non-nil") - } -} - -func TestDecodeInvalidDataType(t *testing.T) { - b, err := ioutil.ReadFile("../testdata/bw-uncompressed.tiff") - if err != nil { - t.Fatal(err) - } - - // off is the offset of the ImageWidth tag. It is the offset of the overall - // IFD block (0x00000454), plus 2 for the uint16 number of IFD entries, plus 12 - // to skip the first entry. - const off = 0x00000454 + 2 + 12*1 - - if v := binary.LittleEndian.Uint16(b[off : off+2]); v != tImageWidth { - t.Fatal(`could not find ImageWidth tag`) - } - binary.LittleEndian.PutUint16(b[off+2:], uint16(len(lengths))) // invalid datatype - - if _, err = Decode(bytes.NewReader(b)); err == nil { - t.Fatal("got nil error, want non-nil") - } -} - -func compare(t *testing.T, img0, img1 image.Image) { - b0 := img0.Bounds() - b1 := img1.Bounds() - if b0.Dx() != b1.Dx() || b0.Dy() != b1.Dy() { - t.Fatalf("wrong image size: want %s, got %s", b0, b1) - } - x1 := b1.Min.X - b0.Min.X - y1 := b1.Min.Y - b0.Min.Y - for y := b0.Min.Y; y < b0.Max.Y; y++ { - for x := b0.Min.X; x < b0.Max.X; x++ { - c0 := img0.At(x, y) - c1 := img1.At(x+x1, y+y1) - r0, g0, b0, a0 := c0.RGBA() - r1, g1, b1, a1 := c1.RGBA() - if r0 != r1 || g0 != g1 || b0 != b1 || a0 != a1 { - t.Fatalf("pixel at (%d, %d) has wrong color: want %v, got %v", x, y, c0, c1) - } - } - } -} - -// TestDecode tests that decoding a PNG image and a TIFF image result in the -// same pixel data. -func TestDecode(t *testing.T) { - img0, err := load("video-001.png") - if err != nil { - t.Fatal(err) - } - img1, err := load("video-001.tiff") - if err != nil { - t.Fatal(err) - } - img2, err := load("video-001-strip-64.tiff") - if err != nil { - t.Fatal(err) - } - img3, err := load("video-001-tile-64x64.tiff") - if err != nil { - t.Fatal(err) - } - img4, err := load("video-001-16bit.tiff") - if err != nil { - t.Fatal(err) - } - - compare(t, img0, img1) - compare(t, img0, img2) - compare(t, img0, img3) - compare(t, img0, img4) -} - -// TestDecodeLZW tests that decoding a PNG image and a LZW-compressed TIFF -// image result in the same pixel data. -func TestDecodeLZW(t *testing.T) { - img0, err := load("blue-purple-pink.png") - if err != nil { - t.Fatal(err) - } - img1, err := load("blue-purple-pink.lzwcompressed.tiff") - if err != nil { - t.Fatal(err) - } - - compare(t, img0, img1) -} - -// TestDecompress tests that decoding some TIFF images that use different -// compression formats result in the same pixel data. -func TestDecompress(t *testing.T) { - var decompressTests = []string{ - "bw-uncompressed.tiff", - "bw-deflate.tiff", - "bw-packbits.tiff", - } - var img0 image.Image - for _, name := range decompressTests { - img1, err := load(name) - if err != nil { - t.Fatalf("decoding %s: %v", name, err) - } - if img0 == nil { - img0 = img1 - continue - } - compare(t, img0, img1) - } -} - -func replace(src []byte, find, repl string) ([]byte, error) { - removeSpaces := func(r rune) rune { - if r != ' ' { - return r - } - return -1 - } - - f, err := hex.DecodeString(strings.Map(removeSpaces, find)) - if err != nil { - return nil, err - } - r, err := hex.DecodeString(strings.Map(removeSpaces, repl)) - if err != nil { - return nil, err - } - dst := bytes.Replace(src, f, r, 1) - if bytes.Equal(dst, src) { - return nil, errors.New("replacement failed") - } - return dst, nil -} - -// TestZeroBitsPerSample tests that an IFD with a bitsPerSample of 0 does not -// cause a crash. -// Issue 10711. -func TestZeroBitsPerSample(t *testing.T) { - b0, err := ioutil.ReadFile(testdataDir + "bw-deflate.tiff") - if err != nil { - t.Fatal(err) - } - - // Mutate the loaded image to have the problem. - // 02 01: tag number (tBitsPerSample) - // 03 00: data type (short, or uint16) - // 01 00 00 00: count - // ?? 00 00 00: value (1 -> 0) - b1, err := replace(b0, - "02 01 03 00 01 00 00 00 01 00 00 00", - "02 01 03 00 01 00 00 00 00 00 00 00", - ) - if err != nil { - t.Fatal(err) - } - - _, err = Decode(bytes.NewReader(b1)) - if err == nil { - t.Fatal("Decode with 0 bits per sample: got nil error, want non-nil") - } -} - -// TestTileTooBig tests that we do not panic when a tile is too big compared to -// the data available. -// Issue 10712 -func TestTileTooBig(t *testing.T) { - b0, err := ioutil.ReadFile(testdataDir + "video-001-tile-64x64.tiff") - if err != nil { - t.Fatal(err) - } - - // Mutate the loaded image to have the problem. - // - // 42 01: tag number (tTileWidth) - // 03 00: data type (short, or uint16) - // 01 00 00 00: count - // xx 00 00 00: value (0x40 -> 0x44: a wider tile consumes more data - // than is available) - b1, err := replace(b0, - "42 01 03 00 01 00 00 00 40 00 00 00", - "42 01 03 00 01 00 00 00 44 00 00 00", - ) - if err != nil { - t.Fatal(err) - } - - // Turn off the predictor, which makes it possible to hit the - // place with the defect. Without this patch to the image, we run - // out of data too early, and do not hit the part of the code where - // the original panic was. - // - // 3d 01: tag number (tPredictor) - // 03 00: data type (short, or uint16) - // 01 00 00 00: count - // xx 00 00 00: value (2 -> 1: 2 = horizontal, 1 = none) - b2, err := replace(b1, - "3d 01 03 00 01 00 00 00 02 00 00 00", - "3d 01 03 00 01 00 00 00 01 00 00 00", - ) - if err != nil { - t.Fatal(err) - } - - _, err = Decode(bytes.NewReader(b2)) - if err == nil { - t.Fatal("did not expect nil error") - } -} - -// TestZeroSizedImages tests that decoding does not panic when image dimensions -// are zero, and returns a zero-sized image instead. -// Issue 10393. -func TestZeroSizedImages(t *testing.T) { - testsizes := []struct { - w, h int - }{ - {0, 0}, - {1, 0}, - {0, 1}, - {1, 1}, - } - for _, r := range testsizes { - img := image.NewRGBA(image.Rect(0, 0, r.w, r.h)) - var buf bytes.Buffer - if err := Encode(&buf, img, nil); err != nil { - t.Errorf("encode w=%d h=%d: %v", r.w, r.h, err) - continue - } - if _, err := Decode(&buf); err != nil { - t.Errorf("decode w=%d h=%d: %v", r.w, r.h, err) - } - } -} - -// TestLargeIFDEntry tests that a large IFD entry does not cause Decode to -// panic. -// Issue 10596. -func TestLargeIFDEntry(t *testing.T) { - testdata := "II*\x00\x08\x00\x00\x00\f\x000000000000" + - "00000000000000000000" + - "00000000000000000000" + - "00000000000000000000" + - "00000000000000\x17\x01\x04\x00\x01\x00" + - "\x00\xc0000000000000000000" + - "00000000000000000000" + - "00000000000000000000" + - "000000" - _, err := Decode(strings.NewReader(testdata)) - if err == nil { - t.Fatal("Decode with large IFD entry: got nil error, want non-nil") - } -} - -// benchmarkDecode benchmarks the decoding of an image. -func benchmarkDecode(b *testing.B, filename string) { - b.StopTimer() - contents, err := ioutil.ReadFile(testdataDir + filename) - if err != nil { - b.Fatal(err) - } - r := &buffer{buf: contents} - b.StartTimer() - for i := 0; i < b.N; i++ { - _, err := Decode(r) - if err != nil { - b.Fatal("Decode:", err) - } - } -} - -func BenchmarkDecodeCompressed(b *testing.B) { benchmarkDecode(b, "video-001.tiff") } -func BenchmarkDecodeUncompressed(b *testing.B) { benchmarkDecode(b, "video-001-uncompressed.tiff") } |