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37 lines
779 B
37 lines
779 B
4 years ago
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package util
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import (
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"errors"
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"fmt"
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"image"
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"image/color"
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"image/png"
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"os"
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)
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// creates a complete black image file
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func CreateBlackBG(width, height int) error {
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bgfile, err := os.Create("blackBG.png")
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if err != nil {
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return errors.New(fmt.Sprintf("Could not create black background file : %s", err))
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}
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image := image.NewRGBA(image.Rect(0, 0, width, height))
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bounds := image.Bounds()
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for y := 0; y < bounds.Max.Y; y++ {
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for x := 0; x < bounds.Max.X; x++ {
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image.Set(x, y, color.Black)
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}
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}
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err = png.Encode(bgfile, image)
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if err != nil {
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return errors.New(fmt.Sprintf("Could not encode an image : %s", err))
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}
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err = bgfile.Close()
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if err != nil {
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return errors.New(fmt.Sprintf("Could not close the background file : %s", err))
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}
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return nil
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}
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