Decode

本文整理汇总了Golang中image.Decode函数的典型用法代码示例。如果您正苦于以下问题：Golang Decode函数的具体用法？Golang Decode怎么用？Golang Decode使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了Decode函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Golang代码示例。

示例1: waterMark

//水印
func waterMark(picBytes []byte) []byte {
    // 打开水印图并解码
    img, fileType, _ := image.Decode(bytes.NewBuffer(picBytes))

    //读取水印图片
    watermark, _ := png.Decode(bytes.NewBuffer(wm))

    //原始图界限
    origin_size := img.Bounds()

    //创建新图层
    canvas := image.NewNRGBA(origin_size)

    //贴原始图
    draw.Draw(canvas, origin_size, img, image.ZP, draw.Src)
    //贴水印图
    draw.Draw(canvas, watermark.Bounds().Add(image.Pt(origin_size.Dx()-watermark.Bounds().Dx(), origin_size.Dy()-watermark.Bounds().Dy()-4)), watermark, image.ZP, draw.Over)

    //生成新图片
    buff := bytes.NewBuffer([]byte{})

    switch fileType {
    case "jpeg":
        jpeg.Encode(buff, canvas, &jpeg.Options{95})
    default:
        png.Encode(buff, canvas)
    }

    return buff.Bytes()
}

开发者ID:elvizlai，项目名称:MGBlog，代码行数:31，代码来源:file.go

示例2: decode

// decoder reads an image from r and modifies the image as defined by opts.
// swapDimensions indicates the decoded image will be rotated after being
// returned, and when interpreting opts, the post-rotation dimensions should
// be considered.
// The decoded image is returned in im. The registered name of the decoder
// used is returned in format. If the image was not successfully decoded, err
// will be non-nil.  If the decoded image was made smaller, needRescale will
// be true.
func decode(r io.Reader, opts *DecodeOpts, swapDimensions bool) (im image.Image, format string, err error, needRescale bool) {
    if opts == nil {
        // Fall-back to normal decode.
        im, format, err = image.Decode(r)
        return im, format, err, false
    }

    var buf bytes.Buffer
    tr := io.TeeReader(r, &buf)
    ic, format, err := image.DecodeConfig(tr)
    if err != nil {
        return nil, "", err, false
    }

    mr := io.MultiReader(&buf, r)
    b := image.Rect(0, 0, ic.Width, ic.Height)
    sw, sh, needRescale := opts.rescaleDimensions(b, swapDimensions)
    if !needRescale {
        im, format, err = image.Decode(mr)
        return im, format, err, false
    }

    imageDebug(fmt.Sprintf("Resizing from %dx%d -> %dx%d", ic.Width, ic.Height, sw, sh))
    if format == "cr2" {
        // Replace mr with an io.Reader to the JPEG thumbnail embedded in a
        // CR2 image.
        if mr, err = cr2.NewReader(mr); err != nil {
            return nil, "", err, false
        }
        format = "jpeg"
    }

    if format == "jpeg" && fastjpeg.Available() {
        factor := fastjpeg.Factor(ic.Width, ic.Height, sw, sh)
        if factor > 1 {
            var buf bytes.Buffer
            tr := io.TeeReader(mr, &buf)
            im, err = fastjpeg.DecodeDownsample(tr, factor)
            switch err.(type) {
            case fastjpeg.DjpegFailedError:
                log.Printf("Retrying with jpeg.Decode, because djpeg failed with: %v", err)
                im, err = jpeg.Decode(io.MultiReader(&buf, mr))
            case nil:
                // fallthrough to rescale() below.
            default:
                return nil, format, err, false
            }
            return rescale(im, sw, sh), format, err, true
        }
    }

    // Fall-back to normal decode.
    im, format, err = image.Decode(mr)
    if err != nil {
        return nil, "", err, false
    }
    return rescale(im, sw, sh), format, err, needRescale
}

开发者ID:rfistman，项目名称:camlistore，代码行数:66，代码来源:images.go

示例3: CheckImage

func CheckImage(t TesterLight, img []byte, sample []byte) {
    i1, _, err := image.Decode(bytes.NewReader(img))
    if err != nil {
        t.Fatal(err)
    }

    i2, _, err := image.Decode(bytes.NewReader(sample))
    if err != nil {
        t.Fatal(err)
    }

    if !i1.Bounds().Eq(i2.Bounds()) {
        t.Fatalf("Different image bounds: %v and %v", i1.Bounds(), i2.Bounds())
    }

    bounds := i1.Bounds()
    for x := bounds.Min.X; x < bounds.Max.Y; x++ {
        for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
            c1 := i1.At(x, y)
            c2 := i2.At(x, y)
            if !CmpColors(c1, c2, 30) {
                t.Fatalf("Different colors at (%v, %v): %v vs %v", x, y, c1, c2)
            }
        }
    }
}

开发者ID:mikhailborodin，项目名称:gopnik，代码行数:26，代码来源:testtile.go

示例4: TestPHA

func TestPHA(t *testing.T) {
    // Load picture from file.
    infile, err := os.Open("./testdata/pic_output.png")
    if err != nil {
        t.Errorf("Load picture: %s.", err)
    }

    // Decode picture.
    srcImg, _, err := image.Decode(infile)
    infile.Close()
    if err != nil {
        t.Errorf("Decode picture: %s.", err)
    }

    fg := PHA(srcImg)
    fmt.Println("Fingerprint:", fg)

    // Load picture2 from file.
    infile, err = os.Open("./testdata/pic_output2.jpg")
    if err != nil {
        t.Errorf("Load picture2: %s.", err)
    }

    // Decode picture.
    srcImg, _, err = image.Decode(infile)
    infile.Close()
    if err != nil {
        t.Errorf("Decode picture2: %s.", err)
    }

    fg2 := PHA(srcImg)
    fmt.Println("Fingerprint:", fg2)

    fmt.Println("Diff num:", CompareDiff(fg, fg2))
}

开发者ID:jango2015，项目名称:sdc，代码行数:35，代码来源:gopha_test.go

示例5: pixels

func pixels(source, target string) bool {
    sourcefile, err := os.Open(source)
    checkerror(err)
    defer sourcefile.Close()

    targetfile, err := os.Open(target)
    checkerror(err)
    defer targetfile.Close()

    sourceimage, _, err := image.Decode(sourcefile)
    targetimage, _, err := image.Decode(targetfile)

    sourcebounds := sourceimage.Bounds()
    targetbounds := targetimage.Bounds()

    if (sourcebounds.Min.Y != targetbounds.Min.Y) || (sourcebounds.Min.X != targetbounds.Min.X) || (sourcebounds.Max.Y != targetbounds.Max.Y) || (sourcebounds.Max.X != targetbounds.Max.X) {
        return false
        // log.Fatalln("Images are not the same size pixel-wise!")
    }

    for y := sourcebounds.Min.Y; y < sourcebounds.Max.Y; y++ {
        for x := sourcebounds.Min.X; x < sourcebounds.Max.X; x++ {
            sr, sg, sb, sa := sourceimage.At(x, y).RGBA()
            tr, tg, tb, ta := targetimage.At(x, y).RGBA()

            if (sr != tr) || (sg != tg) || (sb != tb) || (sa != ta) {
                return false
                // log.Fatalln("Ah! They are not the same!", x, y)
            }
        }
    }

    return true
}

开发者ID:NovemberFoxtrot，项目名称:ratcliff，代码行数:34，代码来源:ratcliff.go