45 lines
830 B
Go
45 lines
830 B
Go
package internal
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import (
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"image/color"
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"strconv"
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)
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// the internally pre buffered (and scaled) image
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var cachedImage []byte
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// the internally pre buffered color palette
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var cachedPalette []byte
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// cache an image
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func cacheImage(image []byte) {
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cachedImage = image
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}
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// cache a color palette
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func cachePalette(colors []color.Color) {
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var palette string
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for index, color := range colors {
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if index > 0 {
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palette += "\n"
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}
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tmp := strconv.Itoa(index)
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if len(tmp) < 2 {
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tmp = "0" + tmp
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}
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tmp = "SLIDESHOW_COLOR" + tmp
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palette += tmp + "=\"" + rgbToHex(color) + "\""
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}
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cachedPalette = []byte(palette)
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}
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// check if an image is cached
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func hasCachedImage() bool {
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return len(cachedImage) > 0
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}
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// check if a color palette is cached
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func hasCachedColorPalette() bool {
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return len(cachedPalette) > 0
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}
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