From c7e44633b1c8c599be1ef35a7a09ddb48e833e99 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <supergriffin64@gmail.com>
Date: Thu, 23 Feb 2023 14:44:54 -0500
Subject: [PATCH] Updated Pattern interface
---
artist/pattern.go | 18 +++++++++++-------
1 file changed, 11 insertions(+), 7 deletions(-)
diff --git a/artist/pattern.go b/artist/pattern.go
index ef87caa..d3fce47 100644
--- a/artist/pattern.go
+++ b/artist/pattern.go
@@ -1,12 +1,16 @@
package artist
-import "image/color"
+import "image"
+import "git.tebibyte.media/sashakoshka/tomo/canvas"
-// Pattern is capable of generating a pattern pixel by pixel.
+// Pattern is capable of drawing to a canvas within the bounds of a given
+// clipping rectangle.
type Pattern interface {
- // AtWhen returns the color of the pixel located at (x, y) relative to
- // the origin point of the pattern (0, 0), when the pattern has the
- // specified width and height. Patterns may ignore the width and height
- // parameters, but it may be useful for some patterns such as gradients.
- AtWhen (x, y, width, height int) (color.RGBA)
+ // Draw draws to destination, using the bounds of destination as a width
+ // and height for things like gradients, bevels, etc. The pattern may
+ // not draw outside the union of destination.Bounds() and clip. The
+ // clipping rectangle effectively takes a subset of the pattern. To
+ // change the bounds of the pattern itself, use canvas.Cut() on the
+ // destination before passing it to Draw().
+ Draw (destination canvas.Canvas, clip image.Rectangle)
}