62 lines
1.1 KiB
Go
62 lines
1.1 KiB
Go
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package imgrow
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import (
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"image"
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"image/color"
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)
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// Image returns an image that is 'img' scalad by 'scalar'.
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//
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// So, for example:
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//
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// var newImage image.Image = imgrow.Image(2, oldImage)
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//
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// ... would return a new image that is just like 'oldImage' except that it is 2 times as big.
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func Image(scalar int, img image.Image) image.Image {
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return internalImage {
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img:img,
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scalar:scalar,
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}
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}
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var _ image.Image = &internalImage{}
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type internalImage struct {
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img image.Image
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scalar int
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}
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func (receiver internalImage) At(x, y int) color.Color {
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var img image.Image = receiver.img
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if nil == img {
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return nil
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}
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var scalar int = receiver.scalar
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x2, y2 := inverseScaleXY(scalar, x, y)
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return img.At(x2, y2)
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}
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func (receiver internalImage) Bounds() image.Rectangle {
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var img image.Image = receiver.img
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if nil == img {
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return image.Rectangle{}
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}
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return scaleRectangle(receiver.scalar, img.Bounds())
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}
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func (receiver internalImage) ColorModel() color.Model {
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var img image.Image = receiver.img
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if nil == img {
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return nil
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}
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return img.ColorModel()
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}
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