mirror of
https://github.com/OpenDiablo2/OpenDiablo2
synced 2024-11-17 18:06:03 -05:00
34 lines
764 B
Go
34 lines
764 B
Go
package d2util
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import (
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"log"
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"github.com/OpenDiablo2/OpenDiablo2/d2common/d2interface"
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)
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// ImgIndexToRGBA converts the given indices byte slice and palette into
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// a byte slice of RGBA values
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func ImgIndexToRGBA(indexData []byte, palette d2interface.Palette) []byte {
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bytesPerPixel := 4
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colorData := make([]byte, len(indexData)*bytesPerPixel)
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for i := 0; i < len(indexData); i++ {
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// Index zero is hardcoded transparent regardless of palette
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if indexData[i] == 0 {
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continue
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}
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c, err := palette.GetColor(int(indexData[i]))
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if err != nil {
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log.Print(err)
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}
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colorData[i*bytesPerPixel] = c.R()
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colorData[i*bytesPerPixel+1] = c.G()
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colorData[i*bytesPerPixel+2] = c.B()
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colorData[i*bytesPerPixel+3] = c.A()
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}
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return colorData
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}
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