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ActiveGo 1.8Package tiff
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func Decode ¶
func Decode(r io.Reader) (img image.Image, err error)
Decode reads a TIFF image from r and returns it as an image.Image. The type of Image returned depends on the contents of the TIFF.
func DecodeConfig ¶
func DecodeConfig(r io.Reader) (image.Config, error)
DecodeConfig returns the color model and dimensions of a TIFF image without decoding the entire image.
func Encode ¶
func Encode(w io.Writer, m image.Image, opt *Options) error
Encode writes the image m to w. opt determines the options used for encoding, such as the compression type. If opt is nil, an uncompressed image is written.
type CompressionType ¶
CompressionType describes the type of compression used in Options.
type CompressionType int
const (
Uncompressed CompressionType = iota
Deflate
)
type FormatError ¶
A FormatError reports that the input is not a valid TIFF image.
type FormatError string
func (FormatError) Error ¶
func (e FormatError) Error() string
type Options ¶
Options are the encoding parameters.
type Options struct {
// Compression is the type of compression used.
Compression CompressionType
// Predictor determines whether a differencing predictor is used;
// if true, instead of each pixel's color, the color difference to the
// preceding one is saved. This improves the compression for certain
// types of images and compressors. For example, it works well for
// photos with Deflate compression.
Predictor bool
}
type UnsupportedError ¶
An UnsupportedError reports that the input uses a valid but unimplemented feature.
type UnsupportedError string
func (UnsupportedError) Error ¶
func (e UnsupportedError) Error() string