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/*
* 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
* 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 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;
private String getProcAddressTableExpr;
public JavaGLPAWrapperEmitter(JavaMethodBindingEmitter methodToWrap, String getProcAddressTableExpr)
{
super(methodToWrap.getBinding(), methodToWrap.getDefaultOutput(), methodToWrap.getRuntimeExceptionType());
this.getProcAddressTableExpr = getProcAddressTableExpr;
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);
if (emitterBeingWrapped.hasModifier(STATIC)) {
this.addModifier(STATIC);
}
}
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);
MethodBinding wrappedBinding = emitterBeingWrapped.getBinding();
String procAddressVariable =
GLEmitter.PROCADDRESS_VAR_PREFIX + wrappedBinding.getName();
writer.println(" final long __addr_ = " + getProcAddressTableExpr + "." + procAddressVariable + ";");
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
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