diff options
Diffstat (limited to 'src/java/com/sun/gluegen/opengl/BuildComposablePipeline.java')
| -rw-r--r-- | src/java/com/sun/gluegen/opengl/BuildComposablePipeline.java | 567 |
1 files changed, 567 insertions, 0 deletions
diff --git a/src/java/com/sun/gluegen/opengl/BuildComposablePipeline.java b/src/java/com/sun/gluegen/opengl/BuildComposablePipeline.java new file mode 100644 index 000000000..5235631be --- /dev/null +++ b/src/java/com/sun/gluegen/opengl/BuildComposablePipeline.java @@ -0,0 +1,567 @@ +/* + * 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 com.sun.gluegen.opengl; + +import com.sun.gluegen.*; + +import java.lang.reflect.*; +import java.io.*; +import java.util.*; +import java.util.regex.*; + +public class BuildComposablePipeline +{ + private String outputDirectory; + private Class classToComposeAround; + + public static void main(String[] args) + { + String nameOfClassToComposeAround = args[0]; + Class classToComposeAround; + try { + classToComposeAround = Class.forName(nameOfClassToComposeAround); + } catch (Exception e) { + throw new RuntimeException( + "Could not find class \"" + nameOfClassToComposeAround + "\"", e); + } + + String outputDir = args[1]; + + BuildComposablePipeline composer = + new BuildComposablePipeline(classToComposeAround, outputDir); + + try + { + composer.emit(); + } + catch (IOException e) + { + throw new RuntimeException( + "Error generating composable pipeline source files", e); + } + } + + protected BuildComposablePipeline(Class classToComposeAround, String outputDirectory) + { + this.outputDirectory = outputDirectory; + this.classToComposeAround = classToComposeAround; + + if (! classToComposeAround.isInterface()) + { + throw new IllegalArgumentException( + classToComposeAround.getName() + " is not an interface class"); + } + } + + /** + * Emit the java source code for the classes that comprise the composable + * pipeline. + */ + public void emit() throws IOException + { + String pDir = outputDirectory; + String pInterface = classToComposeAround.getName(); + List/*<Method>*/ publicMethods = Arrays.asList(classToComposeAround.getMethods()); + + (new DebugPipeline(pDir, pInterface)).emit(publicMethods); + (new TracePipeline(pDir, pInterface)).emit(publicMethods); + } + + //------------------------------------------------------- + + /** + * Emits a Java source file that represents one element of the composable + * pipeline. + */ + protected static abstract class PipelineEmitter + { + private File file; + private String basePackage; + private String baseName; // does not include package! + private String outputDir; + + /** + * @param outputDir the directory into which the pipeline classes will be + * generated. + * @param baseInterfaceClassName the full class name (including package, + * e.g. "java.lang.String") of the interface that the pipeline wraps + * @exception IllegalArgumentException if classToComposeAround is not an + * interface. + */ + public PipelineEmitter(String outputDir, String baseInterfaceClassName) + { + int lastDot = baseInterfaceClassName.lastIndexOf('.'); + if (lastDot == -1) + { + // no package, class is at root level + this.baseName = baseInterfaceClassName; + this.basePackage = null; + } + else + { + this.baseName = baseInterfaceClassName.substring(lastDot+1); + this.basePackage = baseInterfaceClassName.substring(0, lastDot); + } + + this.outputDir = outputDir; + } + + public void emit(List/*<Method>*/ methodsToWrap) throws IOException + { + String pipelineClassName = getPipelineName(); + this.file = new File(outputDir + File.separatorChar + pipelineClassName + ".java"); + String parentDir = file.getParent(); + if (parentDir != null) + { + File pDirFile = new File(parentDir); + pDirFile.mkdirs(); + } + + PrintWriter output = new PrintWriter(new BufferedWriter(new FileWriter(file))); + + CodeGenUtils.emitJavaHeaders(output, + basePackage, + pipelineClassName, + true, + new String[] { "java.io.*" }, + new String[] { "public" }, + new String[] { baseName }, + null, + new CodeGenUtils.EmissionCallback() { + public void emit(PrintWriter w) { emitClassDocComment(w); } + } + ); + + preMethodEmissionHook(output); + + constructorHook(output); + + for (int i = 0; i < methodsToWrap.size(); ++i) + { + Method m = (Method)methodsToWrap.get(i); + emitMethodDocComment(output, m); + emitSignature(output, m); + emitBody(output, m); + } + + postMethodEmissionHook(output); + + output.println(); + output.print(" private " + baseName + " " + getDownstreamObjectName() + ";"); + + // end the class + output.println(); + output.print("} // end class "); + output.println(pipelineClassName); + + output.flush(); + output.close(); + } + + /** Get the name of the object through which API calls should be routed. */ + protected String getDownstreamObjectName() + { + return "downstream" + baseName; + } + + protected void emitMethodDocComment(PrintWriter output, Method m) + { + } + + protected void emitSignature(PrintWriter output, Method m) + { + output.print(" public "); + output.print(' '); + output.print(JavaType.createForClass(m.getReturnType()).getName()); + output.print(' '); + output.print(m.getName()); + output.print('('); + output.print(getArgListAsString(m, true, true)); + output.println(")"); + } + + protected void emitBody(PrintWriter output, Method m) + { + output.println(" {"); + output.print(" "); + Class retType = m.getReturnType(); + + preDownstreamCallHook(output, m); + + if (retType != Void.TYPE) + { + output.print(JavaType.createForClass(retType).getName()); + output.print(" _res = "); + } + output.print(getDownstreamObjectName()); + output.print('.'); + output.print(m.getName()); + output.print('('); + output.print(getArgListAsString(m, false, true)); + output.println(");"); + + postDownstreamCallHook(output, m); + + if (retType != Void.TYPE) + { + output.println(" return _res;"); + } + output.println(" }"); + + } + + private String getArgListAsString(Method m, boolean includeArgTypes, boolean includeArgNames) + { + StringBuffer buf = new StringBuffer(256); + if (!includeArgNames && !includeArgTypes) + { + throw new IllegalArgumentException( + "Cannot generate arglist without both arg types and arg names"); + } + + Class[] argTypes = m.getParameterTypes(); + for (int i = 0; i < argTypes.length; ++i) + { + if (includeArgTypes) + { + buf.append(JavaType.createForClass(argTypes[i]).getName()); + buf.append(' '); + } + + if (includeArgNames) + { + buf.append("arg"); + buf.append(i); + } + if (i < argTypes.length-1) { buf.append(','); } + } + + return buf.toString(); + } + + /** The name of the class around which this pipeline is being + * composed. E.g., if this pipeline was constructed with + * "java.util.Set" as the baseInterfaceClassName, then this method will + * return "Set". + */ + protected String getBaseInterfaceName() + { + return baseName; + } + + /** Get the name for this pipeline class. */ + protected abstract String getPipelineName(); + + /** + * Called after the class headers have been generated, but before any + * method wrappers have been generated. + */ + protected abstract void preMethodEmissionHook(PrintWriter output); + + /** + * Emits the constructor for the pipeline; called after the preMethodEmissionHook. + */ + protected void constructorHook(PrintWriter output) { + output.print( " public " + getPipelineName() + "(" + baseName + " "); + output.println(getDownstreamObjectName() + ")"); + output.println(" {"); + output.println(" if (" + getDownstreamObjectName() + " == null) {"); + output.println(" throw new IllegalArgumentException(\"null " + getDownstreamObjectName() + "\");"); + output.println(" }"); + output.print( " this." + getDownstreamObjectName()); + output.println(" = " + getDownstreamObjectName() + ";"); + output.println(" }"); + output.println(); + } + + /** + * Called after the method wrappers have been generated, but before the + * closing parenthesis of the class is emitted. + */ + protected abstract void postMethodEmissionHook(PrintWriter output); + + /** + * Called before the pipeline routes the call to the downstream object. + */ + protected abstract void preDownstreamCallHook(PrintWriter output, Method m); + + /** + * Called after the pipeline has routed the call to the downstream object, + * but before the calling function exits or returns a value. + */ + protected abstract void postDownstreamCallHook(PrintWriter output, Method m); + + /** Emit a Javadoc comment for this pipeline class. */ + protected abstract void emitClassDocComment(PrintWriter output); + + } // end class PipelineEmitter + + //------------------------------------------------------- + + protected class DebugPipeline extends PipelineEmitter + { + String className; + String baseInterfaceClassName; + public DebugPipeline(String outputDir, String baseInterfaceClassName) + { + super(outputDir, baseInterfaceClassName); + className = "Debug" + getBaseInterfaceName(); + } + + protected String getPipelineName() + { + return className; + } + + protected void preMethodEmissionHook(PrintWriter output) + { + } + + protected void postMethodEmissionHook(PrintWriter output) + { + output.println(" private void checkGLGetError(String caller)"); + output.println(" {"); + output.println(" if (insideBeginEndPair) {"); + output.println(" return;"); + output.println(" }"); + output.println(); + output.println(" // Debug code to make sure the pipeline is working; leave commented out unless testing this class"); + output.println(" //System.err.println(\"Checking for GL errors " + + "after call to \" + caller + \"()\");"); + output.println(); + output.println(" int err = " + + getDownstreamObjectName() + + ".glGetError();"); + output.println(" if (err == GL_NO_ERROR) { return; }"); + output.println(); + output.println(" StringBuffer buf = new StringBuffer("); + output.println(" \"glGetError() returned the following error codes " + + "after a call to \" + caller + \"(): \");"); + output.println(); + output.println(" // Loop repeatedly to allow for distributed GL implementations,"); + output.println(" // as detailed in the glGetError() specification"); + output.println(" int recursionDepth = 10;"); + output.println(" do {"); + output.println(" switch (err) {"); + output.println(" case GL_INVALID_ENUM: buf.append(\"GL_INVALID_ENUM \"); break;"); + output.println(" case GL_INVALID_VALUE: buf.append(\"GL_INVALID_VALUE \"); break;"); + output.println(" case GL_INVALID_OPERATION: buf.append(\"GL_INVALID_OPERATION \"); break;"); + output.println(" case GL_STACK_OVERFLOW: buf.append(\"GL_STACK_OVERFLOW \"); break;"); + output.println(" case GL_STACK_UNDERFLOW: buf.append(\"GL_STACK_UNDERFLOW \"); break;"); + output.println(" case GL_OUT_OF_MEMORY: buf.append(\"GL_OUT_OF_MEMORY \"); break;"); + output.println(" case GL_NO_ERROR: throw new InternalError(\"Should not be treating GL_NO_ERROR as error\");"); + output.println(" default: throw new InternalError(\"Unknown glGetError() return value: \" + err);"); + output.println(" }"); + output.println(" } while ((--recursionDepth >= 0) && (err = " + + getDownstreamObjectName() + + ".glGetError()) != GL_NO_ERROR);"); + output.println(" throw new GLException(buf.toString());"); + output.println(" }"); + + output.println(" /** True if the pipeline is inside a glBegin/glEnd pair.*/"); + output.println(" private boolean insideBeginEndPair = false;"); + output.println(); + + } + protected void emitClassDocComment(PrintWriter output) + { + output.println("/** <P> Composable pipline which wraps an underlying {@link GL} implementation,"); + output.println(" providing error checking after each OpenGL method call. If an error occurs,"); + output.println(" causes a {@link GLException} to be thrown at exactly the point of failure."); + output.println(" Sample code which installs this pipeline: </P>"); + output.println(); + output.println("<PRE>"); + output.println(" drawable.setGL(new DebugGL(drawable.getGL()));"); + output.println("</PRE>"); + output.println("*/"); + } + + protected void preDownstreamCallHook(PrintWriter output, Method m) + { + } + + protected void postDownstreamCallHook(PrintWriter output, Method m) + { + if (m.getName().equals("glBegin")) + { + output.println(" insideBeginEndPair = true;"); + output.println(" // NOTE: can't check glGetError(); it's not allowed inside glBegin/glEnd pair"); + } + else + { + if (m.getName().equals("glEnd")) + { + output.println(" insideBeginEndPair = false;"); + } + + // calls to glGetError() are only allowed outside of glBegin/glEnd pairs + output.println(" checkGLGetError(\"" + m.getName() + "\");"); + } + } + + } // end class DebugPipeline + + //------------------------------------------------------- + + protected class TracePipeline extends PipelineEmitter + { + String className; + String baseInterfaceClassName; + public TracePipeline(String outputDir, String baseInterfaceClassName) + { + super(outputDir, baseInterfaceClassName); + className = "Trace" + getBaseInterfaceName(); + } + + protected String getPipelineName() + { + return className; + } + + protected void preMethodEmissionHook(PrintWriter output) + { + } + + protected void constructorHook(PrintWriter output) { + output.print( " public " + getPipelineName() + "(" + getBaseInterfaceName() + " "); + output.println(getDownstreamObjectName() + ", PrintStream " + getOutputStreamName() + ")"); + output.println(" {"); + output.println(" if (" + getDownstreamObjectName() + " == null) {"); + output.println(" throw new IllegalArgumentException(\"null " + getDownstreamObjectName() + "\");"); + output.println(" }"); + output.print( " this." + getDownstreamObjectName()); + output.println(" = " + getDownstreamObjectName() + ";"); + output.print( " this." + getOutputStreamName()); + output.println(" = " + getOutputStreamName() + ";"); + output.println(" }"); + output.println(); + } + + protected void postMethodEmissionHook(PrintWriter output) + { + output.println("private PrintStream " + getOutputStreamName() + ";"); + output.println("private int indent = 0;"); + output.println("protected String dumpArray(Object obj)"); + output.println("{"); + output.println(" if (obj == null) return \"[null]\";"); + output.println(" StringBuffer sb = new StringBuffer(\"[\");"); + output.println(" int len = java.lang.reflect.Array.getLength(obj);"); + output.println(" int count = Math.min(len,16);"); + output.println(" for ( int i =0; i < count; i++ ) {"); + output.println(" sb.append(java.lang.reflect.Array.get(obj,i));"); + output.println(" if (i < count-1)"); + output.println(" sb.append(',');"); + output.println(" }"); + output.println(" if ( len > 16 )"); + output.println(" sb.append(\"...\").append(len);"); + output.println(" sb.append(']');"); + output.println(" return sb.toString();"); + output.println("}"); + output.println("protected void print(String str)"); + output.println("{"); + output.println(" "+getOutputStreamName()+".print(str);"); + output.println("}"); + output.println("protected void println(String str)"); + output.println("{"); + output.println(" "+getOutputStreamName()+".println(str);"); + output.println("}"); + output.println("protected void printIndent()"); + output.println("{"); + output.println(" for( int i =0; i < indent; i++) {"+getOutputStreamName()+".print(' ');}"); + output.println("}"); + } + protected void emitClassDocComment(PrintWriter output) + { + output.println("/** <P> Composable pipline which wraps an underlying {@link GL} implementation,"); + output.println(" providing tracing information to a user-specified {@link java.io.PrintStream}"); + output.println(" before and after each OpenGL method call. Sample code which installs this pipeline: </P>"); + output.println(); + output.println("<PRE>"); + output.println(" drawable.setGL(new TraceGL(drawable.getGL(), System.err));"); + output.println("</PRE>"); + output.println("*/"); + } + + protected void preDownstreamCallHook(PrintWriter output, Method m) + { + Class[] params = m.getParameterTypes(); + if ( m.getName().equals("glEnd") || m.getName().equals("glEndList")) + { + output.println("indent-=2;"); + output.println(" printIndent();"); + } + else + { + output.println("printIndent();"); + } + + output.print(" print(\"" + m.getName() + "(\""); + for ( int i =0; i < params.length; i++ ) + { + if ( params[i].isArray() ) + output.print("+dumpArray(arg"+i+")"); + else + output.print("+arg"+i); + if ( i < params.length-1) + output.print("+\",\""); + } + output.println("+\")\");"); + output.print(" "); + } + + protected void postDownstreamCallHook(PrintWriter output, Method m) + { + Class ret = m.getReturnType(); + if ( ret != Void.TYPE ) + { + output.println(" println(\" = \"+_res);"); + } + else + { + output.println(" println(\"\");"); + } + } + + private String getOutputStreamName() { + return "stream"; + } + + } // end class TracePipeline +} |