30 lines
812 B
Go
30 lines
812 B
Go
package ui
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import (
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"opslag.de/schobers/galleg/allegro5"
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)
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var dropShadowPalette []allegro5.Color
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func initDropShadowPalette() {
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if nil != dropShadowPalette {
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return
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}
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dropShadowPalette = []allegro5.Color{
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allegro5.NewColorAlpha(0, 0, 0, 0x0f),
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allegro5.NewColorAlpha(0, 0, 0, 0x07),
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allegro5.NewColorAlpha(0, 0, 0, 0x03),
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}
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}
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func DropShadow(x1, y1, x2, y2 float32) {
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initDropShadowPalette()
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allegro5.DrawLine(x1, y2+1, x2+1, y2+1, dropShadowPalette[0], 1)
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allegro5.DrawLine(x2+1, y1, x2+1, y2, dropShadowPalette[0], 1)
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allegro5.DrawLine(x1, y2+2, x2+2, y2+2, dropShadowPalette[1], 1)
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allegro5.DrawLine(x2+2, y1, x2+2, y2+1, dropShadowPalette[1], 1)
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allegro5.DrawLine(x1+1, y2+3, x2+2, y2+3, dropShadowPalette[2], 1)
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allegro5.DrawLine(x2+3, y1+1, x2+3, y2+2, dropShadowPalette[2], 1)
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}
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