imagecheck

package

v0.2.0-beta.1 Latest Latest Go to latest Published: Sep 4, 2026 License: Apache-2.0 Imports: 7 Imported by: 0

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Valid go.mod file
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Repository

github.com/larchwave/flowbaton

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Documentation ¶

Overview ¶

Package imagecheck provides deterministic, host-side encoded image inspection without external dependencies.

Index ¶

type CropError
- func (err *CropError) Error() string
type DecodeError
- func (err *DecodeError) Error() string
- func (err *DecodeError) Unwrap() error
type DimensionMismatchError
- func (err *DimensionMismatchError) Error() string
type Input
type Result
- func Check(expected, actual []byte, crop *image.Rectangle) (Result, error)
type ThresholdError
- func (err *ThresholdError) Error() string

Constants ¶

This section is empty.

Variables ¶

This section is empty.

Functions ¶

This section is empty.

Types ¶

type CropError ¶

type CropError struct {
	Crop           image.Rectangle
	ExpectedBounds image.Rectangle
	ActualBounds   image.Rectangle
	Reason         string
}

CropError reports an empty crop or one not fully contained in both images.

func (*CropError) Error ¶

func (err *CropError) Error() string

type DecodeError ¶

type DecodeError struct {
	Input Input
	Err   error
}

DecodeError reports that one encoded input could not be decoded.

func (*DecodeError) Error ¶

func (err *DecodeError) Error() string

func (*DecodeError) Unwrap ¶

func (err *DecodeError) Unwrap() error

type DimensionMismatchError ¶

type DimensionMismatchError struct {
	Expected image.Point
	Actual   image.Point
}

DimensionMismatchError reports unequal effective dimensions after applying the optional crop.

func (*DimensionMismatchError) Error ¶

func (err *DimensionMismatchError) Error() string

type Input ¶

type Input string

Input identifies one encoded image argument.

const (
	InputExpected Input = "expected"
	InputActual   Input = "actual"
)

type Result ¶

type Result struct {
	// contains filtered or unexported fields
}

Result is an immutable pixel-inspection value. Its state is exposed only through value-returning accessors.

func Check ¶

func Check(expected, actual []byte, crop *image.Rectangle) (Result, error)

Check decodes and checks expected and actual encoded images.

func (Result) DifferenceRatio ¶

func (result Result) DifferenceRatio() float64

DifferenceRatio returns DifferentPixels divided by TotalPixels.

func (Result) DifferentPixels ¶

func (result Result) DifferentPixels() uint64

DifferentPixels returns the exact number of unequal normalized RGBA pixels.

func (Result) TotalPixels ¶

func (result Result) TotalPixels() uint64

TotalPixels returns the exact number of evaluated pixels.

func (Result) WithinThreshold ¶

func (result Result) WithinThreshold(threshold float64) (bool, error)

WithinThreshold reports whether the difference ratio is at or below the inclusive threshold. Thresholds must be finite values in [0,1].

type ThresholdError ¶

type ThresholdError struct {
	Threshold float64
}

ThresholdError reports a non-finite or out-of-range inspection threshold.

func (*ThresholdError) Error ¶

func (err *ThresholdError) Error() string

Source Files ¶

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