1 files changed, 178 insertions, 0 deletions
diff --git a/src/net/java/games/gluegen/opengl/JavaGLPAWrapperEmitter.java b/src/net/java/games/gluegen/opengl/JavaGLPAWrapperEmitter.java
new file mode 100644
index 000000000..e0a098f2a
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+++ b/src/net/java/games/gluegen/opengl/JavaGLPAWrapperEmitter.java
@@ -0,0 +1,178 @@
+/*
+ * Copyright (c) 2003 Sun Microsystems, Inc. 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
+ * MIDROSYSTEMS, 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 net.java.games.gluegen.opengl;
+
+import java.io.*;
+import java.util.*;
+import net.java.games.gluegen.*;
+import net.java.games.gluegen.cgram.types.*;
+
+public class JavaGLPAWrapperEmitter extends JavaMethodBindingImplEmitter
+{
+  private static final CommentEmitter commentEmitterForWrappedMethod =
+    new WrappedMethodCommentEmitter();
+
+  private JavaMethodBindingEmitter emitterBeingWrapped;
+  
+  public JavaGLPAWrapperEmitter(JavaMethodBindingEmitter methodToWrap)
+  {    
+    super(methodToWrap.getBinding(), methodToWrap.getDefaultOutput(), methodToWrap.getRuntimeExceptionType());
+
+    if (methodToWrap.getBinding().hasContainingType())
+    {
+      throw new IllegalArgumentException(
+        "Cannot create OpenGL proc. address wrapper; method has containing type: \"" +
+        methodToWrap.getBinding() + "\"");
+    }
+
+    // make a new emitter that will emit the original method's binding, but
+    // with WRAP_PREFIX before its name. If a body is needed (for array
+    // length checking, unwrapping of wrapper objects to java.nio.Buffers,
+    // etc.) then it will be generated; therefore the emitter being wrapped
+    // should be an "NIO buffer variant" (i.e., after all unpacking has
+    // occurred).
+    emitterBeingWrapped =
+      new JavaMethodBindingEmitter(methodToWrap.getBinding().createNIOBufferVariant(),
+                                   methodToWrap.getDefaultOutput(),
+                                   methodToWrap.getRuntimeExceptionType())
+      {
+        protected void emitName(PrintWriter writer)
+        {
+          writer.print(GLEmitter.WRAP_PREFIX);
+          super.emitName(writer);
+        }       
+        protected int emitArguments(PrintWriter writer)
+        {
+          int numEmitted = super.emitArguments(writer);
+          if (numEmitted > 0)
+          {
+            writer.print(", ");
+          }
+          writer.print("long glProcAddress");
+          ++numEmitted;
+          
+          return numEmitted;
+        }
+      };
+        
+    // copy the modifiers from the original emitter
+    emitterBeingWrapped.addModifiers(methodToWrap.getModifiers());
+    
+    // Change the access of the method we're wrapping to PRIVATE
+    EmissionModifier origAccess = null; // null is equivalent if package access
+    if (emitterBeingWrapped.hasModifier(PUBLIC))
+    {
+      origAccess = PUBLIC;
+    }
+    else if (emitterBeingWrapped.hasModifier(PROTECTED))
+    {
+      origAccess = PROTECTED;
+    }
+    else if (emitterBeingWrapped.hasModifier(PRIVATE))
+    {
+      origAccess = PRIVATE;
+    }
+
+    if (origAccess != null)
+    {
+      emitterBeingWrapped.removeModifier(origAccess);
+    }
+    emitterBeingWrapped.addModifier(PRIVATE);
+    emitterBeingWrapped.addModifier(NATIVE);
+
+    // Now make our binding use the original access of the wrapped method
+    this.addModifier(origAccess);
+  }
+
+  protected boolean needsBody() {
+    return true;
+  }
+
+  protected String getImplMethodName() {
+    return GLEmitter.WRAP_PREFIX + getBinding().getName();
+  }
+
+  public void emit(PrintWriter writer)
+  {
+    // Emit a wrapper that will call the method we want to wrap
+    //writer.println("  // Emitter being wrapped = " + emitterBeingWrapped.getClass().getName());
+    super.emit(writer);
+    writer.println();
+    
+    // emit the wrapped method
+    CommentEmitter origComment = emitterBeingWrapped.getCommentEmitter();
+    emitterBeingWrapped.setCommentEmitter(commentEmitterForWrappedMethod);
+    emitterBeingWrapped.emit(writer);
+    emitterBeingWrapped.setCommentEmitter(origComment);
+    writer.println();    
+  }
+
+  protected void emitPreCallSetup(MethodBinding binding, PrintWriter writer) {
+    super.emitPreCallSetup(binding, writer);
+    JavaType returnType = binding.getJavaReturnType();
+
+    MethodBinding wrappedBinding = emitterBeingWrapped.getBinding();
+    String procAddressVariable =
+      GLEmitter.PROCADDRESS_VAR_PREFIX + wrappedBinding.getName();
+
+    writer.print("    final long addr = context.getGLProcAddressTable().");
+    writer.print(procAddressVariable);    
+    writer.println(';');    
+    writer.println("    if (addr == 0) {");
+    writer.println("      throw new GLException(\"Method \\\"" + binding.getName() + "\\\" not available\");");
+    writer.println("    }");
+  }
+
+  protected int emitCallArguments(MethodBinding binding, PrintWriter writer) {
+    int numEmitted = super.emitCallArguments(binding, writer);
+    if (numEmitted > 0) {
+      writer.print(", ");
+    }
+    writer.print("addr");
+    return 1 + numEmitted;
+  }
+
+  /** This class emits the comment for the wrapper method */
+  private static class WrappedMethodCommentEmitter extends JavaMethodBindingEmitter.DefaultCommentEmitter {
+    protected void emitBeginning(FunctionEmitter methodEmitter, PrintWriter writer) {
+      writer.print("Encapsulates function pointer for OpenGL function <br>: ");
+    }
+  }
+} // end class JavaGLPAWrapperEmitter