From 492fe63d517b554cdf9f6ed355a71b5b18df2c97 Mon Sep 17 00:00:00 2001
From: Kenneth Russel <kbrussel@alum.mit.edu>
Date: Fri, 24 Feb 2006 10:14:36 +0000
Subject: Optimized VBO/PBO checking routines in GLImpl. Now cache availability
 of extensions in booleans rather than querying table each time.

git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@636 232f8b59-042b-4e1e-8c03-345bb8c30851
---
 make/gl-impl-CustomJavaCode.java | 63 +++++++++++++++++++++++++++-------------
 1 file changed, 43 insertions(+), 20 deletions(-)

(limited to 'make/gl-impl-CustomJavaCode.java')

diff --git a/make/gl-impl-CustomJavaCode.java b/make/gl-impl-CustomJavaCode.java
index 210195dec..6d5f55159 100644
--- a/make/gl-impl-CustomJavaCode.java
+++ b/make/gl-impl-CustomJavaCode.java
@@ -149,16 +149,31 @@ private int imageSizeInBytes(int format, int type, int w, int h, int d) {
 }
 
 private int[] bufTmp = new int[1];
-private void checkBufferObject(String extension1,
-                               String extension2,
+private boolean bufferObjectExtensionsInitialized = false;
+private boolean haveARBPixelBufferObject;
+private boolean haveEXTPixelBufferObject;
+private boolean haveGL15;
+private boolean haveARBVertexBufferObject;
+
+private void initBufferObjectExtensionChecks() {
+  if (bufferObjectExtensionsInitialized)
+    return;
+  bufferObjectExtensionsInitialized = true;
+  haveARBPixelBufferObject  = isExtensionAvailable("GL_ARB_pixel_buffer_object");
+  haveEXTPixelBufferObject  = isExtensionAvailable("GL_EXT_pixel_buffer_object");
+  haveGL15                  = isExtensionAvailable("GL_VERSION_1_5");
+  haveARBVertexBufferObject = isExtensionAvailable("GL_ARB_vertex_buffer_object");
+}
+
+private void checkBufferObject(boolean extension1,
+                               boolean extension2,
                                boolean enabled,
                                int state,
                                String kind) {
   if (inBeginEndPair) {
     throw new GLException("May not call this between glBegin and glEnd");
   }
-  boolean avail = ((extension1 != null && isExtensionAvailable(extension1)) ||
-                   (extension2 != null && isExtensionAvailable(extension2)));
+  boolean avail = (extension1 || extension2);
   if (!avail) {
     if (!enabled)
       return;
@@ -177,32 +192,36 @@ private void checkBufferObject(String extension1,
 }  
 
 private void checkUnpackPBODisabled() { 
-  checkBufferObject("GL_ARB_pixel_buffer_object",
-                    "GL_EXT_pixel_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveARBPixelBufferObject,
+                    haveEXTPixelBufferObject,
                     false,
                     GL.GL_PIXEL_UNPACK_BUFFER_BINDING_ARB,
                     "unpack pixel_buffer_object");
 }
 
 private void checkUnpackPBOEnabled() { 
-  checkBufferObject("GL_ARB_pixel_buffer_object",
-                    "GL_EXT_pixel_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveARBPixelBufferObject,
+                    haveEXTPixelBufferObject,
                     true,
                     GL.GL_PIXEL_UNPACK_BUFFER_BINDING_ARB,
                     "unpack pixel_buffer_object");
 }
 
 private void checkPackPBODisabled() { 
-  checkBufferObject("GL_ARB_pixel_buffer_object",
-                    "GL_EXT_pixel_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveARBPixelBufferObject,
+                    haveEXTPixelBufferObject,
                     false,
                     GL.GL_PIXEL_PACK_BUFFER_BINDING_ARB,
                     "pack pixel_buffer_object");
 }
 
 private void checkPackPBOEnabled() { 
-  checkBufferObject("GL_ARB_pixel_buffer_object",
-                    "GL_EXT_pixel_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveARBPixelBufferObject,
+                    haveEXTPixelBufferObject,
                     true,
                     GL.GL_PIXEL_PACK_BUFFER_BINDING_ARB,
                     "pack pixel_buffer_object");
@@ -210,32 +229,36 @@ private void checkPackPBOEnabled() {
 
 
 private void checkArrayVBODisabled() { 
-  checkBufferObject("GL_VERSION_1_5",
-                    "GL_ARB_vertex_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveGL15,
+                    haveARBVertexBufferObject,
                     false,
                     GL.GL_ARRAY_BUFFER_BINDING,
                     "array vertex_buffer_object");
 }
 
 private void checkArrayVBOEnabled() { 
-  checkBufferObject("GL_VERSION_1_5",
-                    "GL_ARB_vertex_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveGL15,
+                    haveARBVertexBufferObject,
                     true,
                     GL.GL_ARRAY_BUFFER_BINDING,
                     "array vertex_buffer_object");
 }
 
 private void checkElementVBODisabled() { 
-  checkBufferObject("GL_VERSION_1_5",
-                    "GL_ARB_vertex_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveGL15,
+                    haveARBVertexBufferObject,
                     false,
                     GL.GL_ELEMENT_ARRAY_BUFFER_BINDING,
                     "element vertex_buffer_object");
 }
 
 private void checkElementVBOEnabled() { 
-  checkBufferObject("GL_VERSION_1_5",
-                    "GL_ARB_vertex_buffer_object",
+  initBufferObjectExtensionChecks();
+  checkBufferObject(haveGL15,
+                    haveARBVertexBufferObject,
                     true,
                     GL.GL_ELEMENT_ARRAY_BUFFER_BINDING,
                     "element vertex_buffer_object");
-- 
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