imgutil

package module

v0.0.0-...-8a3be14 Latest Latest Go to latest Published: Jul 10, 2020 License: ISC Imports: 10 Imported by: 0

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var PNGEncoder = &png.Encoder{

	CompressionLevel: png.NoCompression,
}

func MaxSize(w, h, maxW, maxH int) (int, int)

MaxSize returns the maximum size that can fit within the given max width and height. Aspect ratio is preserved.

func Process(src io.Reader, processors []Processor) (image.Image, error)

Process takes a processor and run them through the image decoded from the stream. The returned image is the processed image.

func ProcessAnimation(src io.Reader, processors []Processor) (*gif.GIF, error)

ProcessAnimation works similarly to Process, but parses a GIF.

func ProcessAnimationStream(dst io.Writer, src io.Reader, processors []Processor) error

ProcessAnimationStream works similarly to ProcessStream, but parses a GIF.

func ProcessStream(dst io.Writer, src io.Reader, processors []Processor) error

ProcessStream takes a processor and run them through the image decoded from the stream. The returned bytes are PNG-encoded and uncompressed.

type Processor func(image.Image) *image.NRGBA

func Prepend(p1 Processor, pN []Processor) []Processor

Prepend prepends p1 before pN.

func Resize(maxW, maxH int) Processor

Resize uses MaxSize to calculate and resize the image accordingly.

func Round(antialias bool) Processor

Round renders an anti-aliased round image. This image crops the source and makes it a square.

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