diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/image/jpeg/reader_test.go')
| -rw-r--r-- | gcc-4.8.1/libgo/go/image/jpeg/reader_test.go | 157 |
1 files changed, 0 insertions, 157 deletions
diff --git a/gcc-4.8.1/libgo/go/image/jpeg/reader_test.go b/gcc-4.8.1/libgo/go/image/jpeg/reader_test.go deleted file mode 100644 index b520a8ab1..000000000 --- a/gcc-4.8.1/libgo/go/image/jpeg/reader_test.go +++ /dev/null @@ -1,157 +0,0 @@ -// 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 jpeg - -import ( - "bytes" - "fmt" - "image" - "io/ioutil" - "os" - "testing" -) - -// TestDecodeProgressive tests that decoding the baseline and progressive -// versions of the same image result in exactly the same pixel data, in YCbCr -// space for color images, and Y space for grayscale images. -func TestDecodeProgressive(t *testing.T) { - testCases := []string{ - "../testdata/video-001", - "../testdata/video-001.q50.420", - "../testdata/video-001.q50.422", - "../testdata/video-001.q50.440", - "../testdata/video-001.q50.444", - "../testdata/video-005.gray.q50", - "../testdata/video-005.gray.q50.2x2", - } - for _, tc := range testCases { - m0, err := decodeFile(tc + ".jpeg") - if err != nil { - t.Errorf("%s: %v", tc+".jpeg", err) - continue - } - m1, err := decodeFile(tc + ".progressive.jpeg") - if err != nil { - t.Errorf("%s: %v", tc+".progressive.jpeg", err) - continue - } - if m0.Bounds() != m1.Bounds() { - t.Errorf("%s: bounds differ: %v and %v", tc, m0.Bounds(), m1.Bounds()) - continue - } - switch m0 := m0.(type) { - case *image.YCbCr: - m1 := m1.(*image.YCbCr) - if err := check(m0.Bounds(), m0.Y, m1.Y, m0.YStride, m1.YStride); err != nil { - t.Errorf("%s (Y): %v", tc, err) - continue - } - if err := check(m0.Bounds(), m0.Cb, m1.Cb, m0.CStride, m1.CStride); err != nil { - t.Errorf("%s (Cb): %v", tc, err) - continue - } - if err := check(m0.Bounds(), m0.Cr, m1.Cr, m0.CStride, m1.CStride); err != nil { - t.Errorf("%s (Cr): %v", tc, err) - continue - } - case *image.Gray: - m1 := m1.(*image.Gray) - if err := check(m0.Bounds(), m0.Pix, m1.Pix, m0.Stride, m1.Stride); err != nil { - t.Errorf("%s: %v", tc, err) - continue - } - default: - t.Errorf("%s: unexpected image type %T", tc, m0) - continue - } - } -} - -func decodeFile(filename string) (image.Image, error) { - f, err := os.Open(filename) - if err != nil { - return nil, err - } - defer f.Close() - return Decode(f) - -} - -// check checks that the two pix data are equal, within the given bounds. -func check(bounds image.Rectangle, pix0, pix1 []byte, stride0, stride1 int) error { - if len(pix0) != len(pix1) { - return fmt.Errorf("len(pix) %d and %d differ", len(pix0), len(pix1)) - } - if stride0 != stride1 { - return fmt.Errorf("strides %d and %d differ", stride0, stride1) - } - if stride0%8 != 0 { - return fmt.Errorf("stride %d is not a multiple of 8", stride0) - } - // Compare the two pix data, one 8x8 block at a time. - for y := 0; y < len(pix0)/stride0; y += 8 { - for x := 0; x < stride0; x += 8 { - if x >= bounds.Max.X || y >= bounds.Max.Y { - // We don't care if the two pix data differ if the 8x8 block is - // entirely outside of the image's bounds. For example, this can - // occur with a 4:2:0 chroma subsampling and a 1x1 image. Baseline - // decoding works on the one 16x16 MCU as a whole; progressive - // decoding's first pass works on that 16x16 MCU as a whole but - // refinement passes only process one 8x8 block within the MCU. - continue - } - - for j := 0; j < 8; j++ { - for i := 0; i < 8; i++ { - index := (y+j)*stride0 + (x + i) - if pix0[index] != pix1[index] { - return fmt.Errorf("blocks at (%d, %d) differ:\n%sand\n%s", x, y, - pixString(pix0, stride0, x, y), - pixString(pix1, stride1, x, y), - ) - } - } - } - } - } - return nil -} - -func pixString(pix []byte, stride, x, y int) string { - s := bytes.NewBuffer(nil) - for j := 0; j < 8; j++ { - fmt.Fprintf(s, "\t") - for i := 0; i < 8; i++ { - fmt.Fprintf(s, "%02x ", pix[(y+j)*stride+(x+i)]) - } - fmt.Fprintf(s, "\n") - } - return s.String() -} - -func benchmarkDecode(b *testing.B, filename string) { - b.StopTimer() - data, err := ioutil.ReadFile(filename) - if err != nil { - b.Fatal(err) - } - cfg, err := DecodeConfig(bytes.NewReader(data)) - if err != nil { - b.Fatal(err) - } - b.SetBytes(int64(cfg.Width * cfg.Height * 4)) - b.StartTimer() - for i := 0; i < b.N; i++ { - Decode(bytes.NewReader(data)) - } -} - -func BenchmarkDecodeBaseline(b *testing.B) { - benchmarkDecode(b, "../testdata/video-001.jpeg") -} - -func BenchmarkDecodeProgressive(b *testing.B) { - benchmarkDecode(b, "../testdata/video-001.progressive.jpeg") -} |