47 lines
1.1 KiB
Go
47 lines
1.1 KiB
Go
package goeffects
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// Package copied from https://github.com/markdaws/go-effects
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import (
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"fmt"
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"image"
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)
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// Rect used for image bounds
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type Rect struct {
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X int
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Y int
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Width int
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Height int
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}
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// String returns a debug string
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func (r Rect) String() string {
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return fmt.Sprintf("X:%d, Y:%d, Width:%d, Height:%d", r.X, r.Y, r.Width, r.Height)
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}
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// Intersect returns the intersection between two rectangles
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func (r Rect) Intersect(r2 Rect) Rect {
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x := max(r.X, r2.X)
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num1 := min((r.X+r.Width), (r2.X+r2.Width))
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y := max(r.Y, r2.Y)
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num2 := min((r.Y+r.Height), (r2.Y+r2.Height))
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if num1 >= x && num2 >= y {
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return Rect{X: x, Y: y, Width: (num1 - x), Height: (num2 - y)}
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}
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return Rect{}
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}
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// IsEmpty returns true if this is an empty rectangle
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func (r Rect) IsEmpty() bool {
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return r.Width == 0 || r.Height == 0
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}
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// ToImageRect returns an image.Rectangle instance initialized from this Rect
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func (r Rect) ToImageRect() image.Rectangle {
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return image.Rectangle{
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Min: image.Point{X: r.X, Y: r.Y},
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Max: image.Point{X: r.X + r.Width, Y: r.Y + r.Height},
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}
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}
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