[Java-game-lib-cvs] SF.net SVN: java-game-lib:[3714] trunk/LWJGL/src/templates/org/lwjgl/opengl /AMD_pinned_memory.java

[<sp...@us...>]

Revision: 3714
          http://java-game-lib.svn.sourceforge.net/java-game-lib/?rev=3714&view=rev
Author:   spasi
Date:     2011-12-20 17:16:23 +0000 (Tue, 20 Dec 2011)
Log Message:
-----------
Updated AMD_pinned_memory based on official spec.

Modified Paths:
--------------
    trunk/LWJGL/src/templates/org/lwjgl/opengl/AMD_pinned_memory.java

Modified: trunk/LWJGL/src/templates/org/lwjgl/opengl/AMD_pinned_memory.java
===================================================================
--- trunk/LWJGL/src/templates/org/lwjgl/opengl/AMD_pinned_memory.java	2011-12-20 11:04:49 UTC (rev 3713)
+++ trunk/LWJGL/src/templates/org/lwjgl/opengl/AMD_pinned_memory.java	2011-12-20 17:16:23 UTC (rev 3714)
@@ -34,22 +34,10 @@
 public interface AMD_pinned_memory {
 
 	/**
-	 * <strong>Official spec not released yet. Info from AMD developer forums:</strong><br/>
-	 * Create a buffer object, bind it to the GL_EXTERNAL_VIRTUAL_MEMORY_AMD target and call glBufferData to 'allocate' space.
-	 * When the driver sees you do this, it will use the pointer you supply directly rather than copying the data (that is, the
-	 * GPU will access your application's memory). You can then use the buffer for other purposes such as a UBO, TBO or VBO by
-	 * binding it to the appropriate targets. Synchronization is left to the application - make use of glFenceSync and glWaitSync.
-	 * To release the memory, simply call glBufferData again on the buffer object on a different target, or delete the buffer
-	 * object. Don't free the memory in the application until you've detached it from the buffer object or bad stuff will happen.
-	 * <p/>
-	 * Keep in mind that any memory you access will go over the PCIe bus which will be limited to 3-4 GB/s. This will work much
-	 * better on Fusion systems (APUs). Theoretically, there isn't a limit to the amount of memory that can be pinned. However,
-	 * when the OS pins memory, it removes it from the regular pagable pool and cannot swap it to disk (this is what pinning
-	 * means). If you ask for too much, the OS will refuse to do it and the call will fail (the GL driver will return generate
-	 * a GL_OUT_OF_MEMORY error). It is very likely that you'll hit this limit long before you run out of address space on the
-	 * GPU, although in practice we do impose a moderate limit on the amount of pinned memory so as to not impact system stability
-	 * and performance.
+	 * Accepted by the &lt;target&gt; parameters of BindBuffer, BufferData,
+	 * BufferSubData, MapBuffer, UnmapBuffer, GetBufferSubData,
+	 * GetBufferParameteriv, GetBufferPointerv, MapBufferRange:
 	 */
-	int GL_EXTERNAL_VIRTUAL_MEMORY_AMD = 0x9160;
+	int GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD = 0x9160;
 
 }
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