From 4552c880a6fd30f5bd87ce101491e0e966c42d77 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson@vistahigherlearning.com>
Date: Tue, 11 Jun 2019 09:19:34 -0400
Subject: node-2d: sprite: Allow overriding texcoords and destination
 rectangle.

---
 starling/node-2d.scm | 26 +++++++++++++++++++++++---
 1 file changed, 23 insertions(+), 3 deletions(-)

diff --git a/starling/node-2d.scm b/starling/node-2d.scm
index 663942c..cc0c85c 100644
--- a/starling/node-2d.scm
+++ b/starling/node-2d.scm
@@ -79,6 +79,8 @@
 
             <sprite>
             texture
+            texcoords
+            rect
             blend-mode
             tint
 
@@ -465,9 +467,15 @@
 
 (define-generic texture)
 
+(define-method (texcoords (sprite <base-sprite>))
+  (texture-gl-tex-rect (asset-ref (texture sprite))))
+
+(define-method (rect (sprite <base-sprite>))
+  (texture-gl-rect (asset-ref (texture sprite))))
+
 (define-method (render (sprite <base-sprite>) alpha)
   (let* ((tex (asset-ref (texture sprite)))
-         (rect (texture-gl-rect tex))
+         (rect (rect sprite))
          (batch (batch sprite))
          (tint (tint sprite))
          (matrix (world-matrix sprite)))
@@ -475,7 +483,9 @@
         (sprite-batch-add* batch rect matrix
                            #:tint tint
                            #:texture-region tex)
-        (draw-sprite* tex rect matrix #:tint tint))))
+        (draw-sprite* tex rect matrix
+                      #:tint tint
+                      #:texcoords (texcoords sprite)))))
 
 
 ;;;
@@ -483,7 +493,17 @@
 ;;;
 
 (define-class <sprite> (<base-sprite>)
-  (texture #:accessor texture #:init-keyword #:texture))
+  (texture #:accessor texture #:init-keyword #:texture)
+  (texcoords #:init-keyword #:texcoords #:init-form #f)
+  (rect #:init-keyword #:rect #:init-form #f))
+
+(define-method (texcoords (sprite <sprite>))
+  (or (slot-ref sprite 'texcoords)
+      (next-method)))
+
+(define-method (rect (sprite <sprite>))
+  (or (slot-ref sprite 'rect)
+      (next-method)))
 
 
 ;;;
-- 
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