From 2b656ad8fcafc1ebaaa7fe154f015e85b9dbd941 Mon Sep 17 00:00:00 2001
From: David Thompson <dthompson2@worcester.edu>
Date: Thu, 22 May 2014 21:20:13 -0400
Subject: Rename, unexport, and memoize shader-program-attribute-location.

* 2d/shader.scm (shader-program-attribute-location): Rename.
  (attribute-location): Memoize.
---
 2d/shader.scm | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to '2d')

diff --git a/2d/shader.scm b/2d/shader.scm
index 1ed18bd..4fffcb3 100644
--- a/2d/shader.scm
+++ b/2d/shader.scm
@@ -46,7 +46,6 @@
             shader-program-id
             shader-program?
             shader-program-linked?
-            shader-program-attribute-location
             with-shader-program
             %uniform-setters
             register-uniform-setter!
@@ -233,10 +232,6 @@ VERTEX-SHADER and FRAGMENT-SHADER."
         (glUseProgram 0)
         return-value))))
 
-(define (shader-program-attribute-location program name)
-  "Get the location of the attribute NAME within the shader PROGRAM."
-  (glGetAttribLocation (shader-program-id program) name))
-
 (define-record-type <uniform-setter>
   (make-uniform-setter predicate proc)
   uniform-setter?
@@ -291,6 +286,13 @@ location."
      (glGetUniformLocation (shader-program-id shader-program)
                            (symbol->string name)))))
 
+(define attribute-location
+  (memoize
+   (lambda (shader-program name)
+     "Retrieve the location for the uniform NAME within SHADER-PROGRAM."
+     (glGetAttribLocation (shader-program-id shader-program)
+                           (symbol->string name)))))
+
 (define (uniform-set! shader-program name value)
   "Use the appropriate setter procedure to translate VALUE into OpenGL
 compatible data and assign it to the location of the uniform NAME
-- 
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