From c3c6ff61f50b0f12d494a7ce5039d09978c4a19f Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Tue, 5 Sep 2023 18:14:36 -0400
Subject: [PATCH] Add Tiler interface

---
 canvas/canvas.go  |  1 +
 canvas/texture.go | 16 ++++++++++++++++
 object.go         |  2 ++
 3 files changed, 19 insertions(+)

diff --git a/canvas/canvas.go b/canvas/canvas.go
index 8468f98..64d4273 100644
--- a/canvas/canvas.go
+++ b/canvas/canvas.go
@@ -47,6 +47,7 @@ type Pen interface {
 	Stroke  (color.Color) // Sets the stroke to a solid color
 	Fill    (color.Color) // Sets the fill to a solid color
 	Texture (Texture)     // Overlaps a texture onto the fill color
+	Tiler   (Tiler)       // Changes the way the texture is tiled
 }
 
 // Canvas is an image that supports drawing paths.
diff --git a/canvas/texture.go b/canvas/texture.go
index 6fb2a05..fe269a5 100644
--- a/canvas/texture.go
+++ b/canvas/texture.go
@@ -18,3 +18,19 @@ type TextureCloser interface {
 	Texture
 	io.Closer
 }
+
+// TileArea represents a tiled area of a texture.
+type TileArea struct {
+	// Source specifies an area of the texture to sample.
+	Source      image.Rectangle
+
+	// Destination specifies an area of the destination to draw the texture
+	// onto. If Destination is bigger than Source, the empty space will be
+	// filled by tiling the texture (clipped to source) normally.
+	Destination image.Rectangle
+}
+
+// Tiler is a type that changes the way a texture is drawn.
+type Tiler interface {
+	Tile (image.Rectangle, Texture) []TileArea
+}
diff --git a/object.go b/object.go
index 869cd45..2b3d246 100644
--- a/object.go
+++ b/object.go
@@ -136,6 +136,8 @@ type Box interface {
 	// transparent, it will be overlayed atop the color specified by
 	// SetColor().
 	SetTexture     (canvas.Texture)
+	// SetTiler changes the way the texture is tiled.
+	SetTiler       (canvas.Tiler)
 	// SetBorder sets the Border(s) of the box. The first Border will be the
 	// most outset, and the last Border will be the most inset.
 	SetBorder      (...Border)