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32 lines
837 B
Go
32 lines
837 B
Go
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package drawing
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import (
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"image"
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"image/color"
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"golang.org/x/image/draw"
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"golang.org/x/image/math/f64"
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"github.com/golang/freetype/raster"
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)
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// Painter implements the freetype raster.Painter and has a SetColor method like the RGBAPainter
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type Painter interface {
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raster.Painter
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SetColor(color color.Color)
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}
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// DrawImage draws an image into dest using an affine transformation matrix, an op and a filter
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func DrawImage(src image.Image, dest draw.Image, tr Matrix, op draw.Op, filter ImageFilter) {
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var transformer draw.Transformer
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switch filter {
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case LinearFilter:
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transformer = draw.NearestNeighbor
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case BilinearFilter:
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transformer = draw.BiLinear
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case BicubicFilter:
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transformer = draw.CatmullRom
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}
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transformer.Transform(dest, f64.Aff3{tr[0], tr[1], tr[4], tr[2], tr[3], tr[5]}, src, src.Bounds(), op, nil)
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}
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