49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
package x
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import "image"
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import "git.tebibyte.media/tomo/tomo"
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type texture struct {
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pix []uint8
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stride int
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rect image.Rectangle
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transparent bool
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}
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func (backend *Backend) NewTexture (source image.Image) tomo.Texture {
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bounds := source.Bounds()
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texture := &texture {
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pix: make([]uint8, bounds.Dx() * bounds.Dy() * 4),
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stride: bounds.Dx(),
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rect: bounds.Sub(bounds.Min),
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}
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index := 0
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var point image.Point
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for point.Y = bounds.Min.Y; point.Y < bounds.Max.Y; point.Y ++ {
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for point.X = bounds.Min.X; point.X < bounds.Max.X; point.X ++ {
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r, g, b, a := source.At(point.X, point.Y).RGBA()
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texture.pix[index + 0] = uint8(b >> 8)
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texture.pix[index + 1] = uint8(g >> 8)
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texture.pix[index + 2] = uint8(r >> 8)
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texture.pix[index + 3] = uint8(a >> 8)
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index += 4
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if a != 0xFFFF {
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texture.transparent = true
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}
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}}
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return texture
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}
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func (this *texture) Clip (bounds image.Rectangle) tomo.Texture {
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clipped := *this
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clipped.rect = bounds
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return &clipped
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}
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func (this *texture) Close () error {
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return nil
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}
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