From 4cda4b70dbcd21cf57e1e253ddba32b88bcaec18 Mon Sep 17 00:00:00 2001
From: Sven Gothel <sgothel@jausoft.com>
Date: Tue, 8 Feb 2011 06:20:35 +0100
Subject: Move implementation private files from com.jogamp.<module>.impl. to
jogamp.<module> (1/2) - rename task
- com.jogamp.opengl.impl -> jogamp.opengl
- com.jogamp.opengl.util.glsl.fixedfunc.impl -> jogamp.opengl.util.glsl.fixedfunc
- com.jogamp.nativewindow.impl -> jogamp.nativewindow
- com.jogamp.newt.impl -> jogamp.newt
This sorts implementation details from the top level, ie skipping the public 'com',
allowing a better seperation of public classes and implementation details
and also reduces strings.
This approach of public/private seperation is also used in the OpenJDK.
---
.../jogamp/opengl/ExtensionAvailabilityCache.java | 218 +++++++++++++++++++++
1 file changed, 218 insertions(+)
create mode 100644 src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
(limited to 'src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java')
diff --git a/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java b/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
new file mode 100644
index 000000000..a5fa98bb3
--- /dev/null
+++ b/src/jogl/classes/jogamp/opengl/ExtensionAvailabilityCache.java
@@ -0,0 +1,218 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
+ * Copyright (c) 2010 JogAmp Community. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * - Redistribution of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistribution in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * Neither the name of Sun Microsystems, Inc. or the names of
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * This software is provided "AS IS," without a warranty of any kind. ALL
+ * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
+ * INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
+ * MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
+ * ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
+ * DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
+ * ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
+ * DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
+ * DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
+ * ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
+ * SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
+ *
+ * You acknowledge that this software is not designed or intended for use
+ * in the design, construction, operation or maintenance of any nuclear
+ * facility.
+ *
+ * Sun gratefully acknowledges that this software was originally authored
+ * and developed by Kenneth Bradley Russell and Christopher John Kline.
+ */
+
+package com.jogamp.opengl.impl;
+
+import javax.media.opengl.*;
+import java.util.*;
+
+/**
+ * A utility object intended to be used by implementations to act as a cache
+ * of which OpenGL extensions are currently available on both the host machine
+ * and display.
+ */
+final class ExtensionAvailabilityCache {
+ protected static final boolean DEBUG = GLContextImpl.DEBUG;
+ private static final boolean DEBUG_AVAILABILITY = Debug.isPropertyDefined("jogl.debug.ExtensionAvailabilityCache", true);
+
+ ExtensionAvailabilityCache(GLContextImpl context)
+ {
+ this.context = context;
+ }
+
+ /**
+ * Flush the cache. The cache will be rebuilt lazily as calls to {@link
+ * #isExtensionAvailable(String)} are received.
+ */
+ final void flush()
+ {
+ if(DEBUG) {
+ System.out.println("ExtensionAvailabilityCache: Flush availability OpenGL "+context.getGLVersion());
+ }
+ availableExtensionCache.clear();
+ initialized = false;
+ }
+
+ /**
+ * Flush the cache and rebuild the cache.
+ */
+ final void reset() {
+ flush();
+ initAvailableExtensions();
+ }
+
+ final boolean isInitialized() {
+ return initialized && !availableExtensionCache.isEmpty() ;
+ }
+
+ final boolean isExtensionAvailable(String glExtensionName) {
+ initAvailableExtensions();
+ return availableExtensionCache.contains(mapGLExtensionName(glExtensionName));
+ }
+
+ final String getPlatformExtensionsString() {
+ initAvailableExtensions();
+ return glXExtensions;
+ }
+
+ final String getGLExtensionsString() {
+ initAvailableExtensions();
+ if(DEBUG) {
+ System.err.println("ExtensionAvailabilityCache: getGLExtensions() called");
+ }
+ return glExtensions;
+ }
+
+ private final void initAvailableExtensions() {
+ GL gl = context.getGL();
+ // if hash is empty (meaning it was flushed), pre-cache it with the list
+ // of extensions that are in the GL_EXTENSIONS string
+ if (availableExtensionCache.isEmpty() || !initialized) {
+ if (DEBUG) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Pre-caching init "+gl+", OpenGL "+context.getGLVersion());
+ }
+
+ boolean useGetStringi = false;
+
+ // Use 'glGetStringi' only for ARB GL3 context,
+ // on GL2 platforms the function might be available, but not working.
+ if ( context.isGL3() ) {
+ if ( ! context.isFunctionAvailable("glGetStringi") ) {
+ if(DEBUG) {
+ System.err.println("GLContext: GL >= 3.1 usage, but no glGetStringi");
+ }
+ } else {
+ useGetStringi = true;
+ }
+ }
+
+ if (DEBUG) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Pre-caching extension availability OpenGL "+context.getGLVersion()+
+ ", use "+ ( useGetStringi ? "glGetStringi" : "glGetString" ) );
+ }
+
+ StringBuffer sb = new StringBuffer();
+ if(useGetStringi) {
+ GL2GL3 gl2gl3 = gl.getGL2GL3();
+ int[] numExtensions = { 0 } ;
+ gl2gl3.glGetIntegerv(gl2gl3.GL_NUM_EXTENSIONS, numExtensions, 0);
+ for (int i = 0; i < numExtensions[0]; i++) {
+ sb.append(gl2gl3.glGetStringi(gl2gl3.GL_EXTENSIONS, i));
+ if(i < numExtensions[0]) {
+ sb.append(" ");
+ }
+ }
+ if (DEBUG) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: GL_EXTENSIONS: "+numExtensions[0]);
+ }
+ if(0==numExtensions[0]) {
+ // fall back ..
+ useGetStringi=false;
+ }
+ }
+ if(!useGetStringi) {
+ sb.append(gl.glGetString(GL.GL_EXTENSIONS));
+ }
+ glExtensions = sb.toString();
+ glXExtensions = context.getPlatformExtensionsString();
+
+ sb.append(" ");
+ sb.append(glXExtensions);
+
+ String allAvailableExtensions = sb.toString();
+ if (DEBUG_AVAILABILITY) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: GL vendor: " + gl.glGetString(GL.GL_VENDOR));
+ }
+ StringTokenizer tok = new StringTokenizer(allAvailableExtensions);
+ while (tok.hasMoreTokens()) {
+ String availableExt = tok.nextToken().trim();
+ availableExt = availableExt.intern();
+ availableExtensionCache.add(availableExt);
+ if (DEBUG_AVAILABILITY) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Available: " + availableExt);
+ }
+ }
+ if (DEBUG) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: ALL EXTENSIONS: "+availableExtensionCache.size());
+ }
+
+ int major[] = new int[] { context.getGLVersionMajor() };
+ int minor[] = new int[] { context.getGLVersionMinor() };
+ while (GLContext.isValidGLVersion(major[0], minor[0])) {
+ availableExtensionCache.add("GL_VERSION_" + major[0] + "_" + minor[0]);
+ if (DEBUG) {
+ System.err.println(getThreadName() + ":ExtensionAvailabilityCache: Added GL_VERSION_" + major[0] + "_" + minor[0] + " to known extensions");
+ }
+ if(!GLContext.decrementGLVersion(major, minor)) break;
+ }
+
+ // put a dummy var in here so that the cache is no longer empty even if
+ // no extensions are in the GL_EXTENSIONS string
+ availableExtensionCache.add("<INTERNAL_DUMMY_PLACEHOLDER>");
+
+ initialized = true;
+ }
+ }
+
+ // FIXME: hack to re-enable GL_NV_vertex_array_range extension after
+ // recent upgrade to new wglext.h and glxext.h headers
+ private static String mapGLExtensionName(String extensionName) {
+ if (extensionName != null &&
+ (extensionName.equals("WGL_NV_vertex_array_range") ||
+ extensionName.equals("GLX_NV_vertex_array_range")))
+ return "GL_NV_vertex_array_range";
+ return extensionName;
+ }
+
+ //----------------------------------------------------------------------
+ // Internals only below this point
+ //
+
+ private boolean initialized = false;
+ private String glExtensions = null;
+ private String glXExtensions = null;
+ private HashSet availableExtensionCache = new HashSet(50);
+ private GLContextImpl context;
+
+ static String getThreadName() {
+ return Thread.currentThread().getName();
+ }
+
+}
--
cgit v1.2.3