package debug

import "image/draw"
import "image/color"
import "golang.org/x/image/math/fixed"
import "git.tebibyte.media/tomo/typeset"
import "git.tebibyte.media/tomo/typeset/internal"

// DrawBounds draws the LayoutBounds, MinimumSize, and LayoutBoundsSpace of a
// TypeSetter to the given image using these colors:
//   - Red:   LayoutBounds
//   - Green: MinimumSize
//   - Blue:  LayoutBoundsSpace
func DrawBounds (destination draw.Image, setter *typeset.TypeSetter, offset fixed.Point26_6) {
	blue  := color.RGBA { B: 255, A: 255 }
	red   := color.RGBA { R: 255, A: 255 }
	green := color.RGBA { G: 255, A: 255 }

	layoutBoundsSpace := setter.LayoutBoundsSpace()
	layoutBounds      := setter.LayoutBounds()
	
	minimum     := setter.MinimumSize()
	minimumRect := internal.RoundRect(fixed.Rectangle26_6 { Max: minimum }.Add(offset).Add(layoutBounds.Min))
	internal.DrawRectangleOutline(destination, minimumRect, green)
	
	internal.DrawRectangleOutline(destination, internal.RoundRect(layoutBoundsSpace.Add(offset)), blue)
	internal.DrawRectangleOutline(destination, internal.RoundRect(layoutBounds.Add(offset)), red)
}