gltrace: Display state transformation errors in a console.

This patch adds a Eclipse Message Console for GLTrace View.
Errors that occur during creation of state transformations,
and during application of these transformations are displayed
in this console.

Change-Id: If8686217f7809efeea39d088d70ab665af674930

17 files changed, 185 insertions, 35 deletions

diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/META-INF/MANIFEST.MF b/eclipse/plugins/com.android.ide.eclipse.gldebugger/META-INF/MANIFEST.MF
index e3ca918..a03c229 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/META-INF/MANIFEST.MF
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/META-INF/MANIFEST.MF
@@ -3,13 +3,14 @@ Bundle-ManifestVersion: 2
 Bundle-Name: GLESv2 Debugger Client
 Bundle-SymbolicName: com.android.ide.eclipse.gldebugger;singleton:=true
 Bundle-Version: 17.0.0.qualifier
-Bundle-Activator: com.android.ide.eclipse.gldebugger.Activator
+Bundle-Activator: com.android.ide.eclipse.gldebugger.GlTracePlugin
 Require-Bundle: org.eclipse.ui,
  org.eclipse.core.runtime,
  com.android.ide.eclipse.ddms,
  org.eclipse.ui.ide,
  org.eclipse.core.resources,
- org.eclipse.core.filesystem
+ org.eclipse.core.filesystem,
+ org.eclipse.ui.console
 Bundle-ActivationPolicy: lazy
 Bundle-ClassPath: libs/host-libprotobuf-java-2.3.0-lite.jar,
  libs/liblzf.jar,
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gldebugger/Activator.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gldebugger/GlTracePlugin.java
index 67fd809..dafb661 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gldebugger/Activator.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gldebugger/GlTracePlugin.java
@@ -17,24 +17,37 @@
 package com.android.ide.eclipse.gldebugger;

 

 import org.eclipse.jface.resource.ImageDescriptor;

+import org.eclipse.swt.widgets.Display;

+import org.eclipse.ui.IWorkbenchPage;

+import org.eclipse.ui.IWorkbenchWindow;

+import org.eclipse.ui.PartInitException;

+import org.eclipse.ui.PlatformUI;

+import org.eclipse.ui.console.ConsolePlugin;

+import org.eclipse.ui.console.IConsole;

+import org.eclipse.ui.console.IConsoleConstants;

+import org.eclipse.ui.console.MessageConsole;

+import org.eclipse.ui.console.MessageConsoleStream;

 import org.eclipse.ui.plugin.AbstractUIPlugin;

 import org.osgi.framework.BundleContext;

 

 /**

  * The activator class controls the plug-in life cycle

  */

-public class Activator extends AbstractUIPlugin {

+public class GlTracePlugin extends AbstractUIPlugin {

 

     // The plug-in ID

     public static final String PLUGIN_ID = "com.android.ide.eclipse.gldebugger"; //$NON-NLS-1$

 

     // The shared instance

-    private static Activator plugin;

+    private static GlTracePlugin plugin;

+

+    private MessageConsole mConsole;

+    private MessageConsoleStream mConsoleStream;

 

     /**

      * The constructor

      */

-    public Activator() {

+    public GlTracePlugin() {

     }

 

     /*

@@ -47,6 +60,12 @@ public class Activator extends AbstractUIPlugin {
     public void start(BundleContext context) throws Exception {

         super.start(context);

         plugin = this;

+

+        mConsole = new MessageConsole("OpenGL Trace View", null);

+        ConsolePlugin.getDefault().getConsoleManager().addConsoles(new IConsole[] {

+                mConsole });

+

+        mConsoleStream = mConsole.newMessageStream();

     }

 

     /*

@@ -66,7 +85,7 @@ public class Activator extends AbstractUIPlugin {
      *

      * @return the shared instance

      */

-    public static Activator getDefault() {

+    public static GlTracePlugin getDefault() {

         return plugin;

     }

 

@@ -80,4 +99,32 @@ public class Activator extends AbstractUIPlugin {
     public static ImageDescriptor getImageDescriptor(String path) {

         return imageDescriptorFromPlugin(PLUGIN_ID, path);

     }

+

+    public void logMessage(String message) {

+        mConsoleStream.println(message);

+

+        Display.getDefault().asyncExec(sShowConsoleRunnable);

+    }

+

+    private static Runnable sShowConsoleRunnable = new Runnable() {

+        @Override

+        public void run() {

+            showConsoleView();

+        };

+    };

+

+    private static void showConsoleView() {

+        IWorkbenchWindow w = PlatformUI.getWorkbench().getActiveWorkbenchWindow();

+        if (w != null) {

+            IWorkbenchPage page = w.getActivePage();

+            if (page != null) {

+                try {

+                    page.showView(IConsoleConstants.ID_CONSOLE_VIEW, null,

+                            IWorkbenchPage.VIEW_VISIBLE);

+                } catch (PartInitException e) {

+                    // ignore

+                }

+            }

+        }

+    }

 }

diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/GLTraceOptionsDialog.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/GLTraceOptionsDialog.java
index b0e1b1f..ac752e7 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/GLTraceOptionsDialog.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/GLTraceOptionsDialog.java
@@ -18,7 +18,7 @@ package com.android.ide.eclipse.gltrace;
 
 import com.android.ddmlib.AndroidDebugBridge;
 import com.android.ddmlib.IDevice;
-import com.android.ide.eclipse.gldebugger.Activator;
+import com.android.ide.eclipse.gldebugger.GlTracePlugin;
 
 import org.eclipse.core.runtime.preferences.IEclipsePreferences;
 import org.eclipse.core.runtime.preferences.InstanceScope;
@@ -283,7 +283,7 @@ public class GLTraceOptionsDialog extends TitleAreaDialog {
     }
 
     private void savePreferences() {
-        IEclipsePreferences prefs = new InstanceScope().getNode(Activator.PLUGIN_ID);
+        IEclipsePreferences prefs = new InstanceScope().getNode(GlTracePlugin.PLUGIN_ID);
         prefs.put(PREF_APPNAME, mActivityToTrace);
         prefs.put(PREF_TRACEFILE, mTraceFilePath);
         try {
@@ -294,7 +294,7 @@ public class GLTraceOptionsDialog extends TitleAreaDialog {
     }
 
     private void loadPreferences() {
-        IEclipsePreferences prefs = new InstanceScope().getNode(Activator.PLUGIN_ID);
+        IEclipsePreferences prefs = new InstanceScope().getNode(GlTracePlugin.PLUGIN_ID);
         mActivityToTrace = prefs.get(PREF_APPNAME, "");
         mTraceFilePath = prefs.get(PREF_TRACEFILE, "");
     }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/TraceFileParserTask.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/TraceFileParserTask.java
index 083cba5..7bd86d5 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/TraceFileParserTask.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/TraceFileParserTask.java
@@ -17,6 +17,7 @@
 package com.android.ide.eclipse.gltrace;
 
 import com.android.ide.eclipse.gldebugger.GLEnum;
+import com.android.ide.eclipse.gldebugger.GlTracePlugin;
 import com.android.ide.eclipse.gltrace.GLProtoBuf.GLMessage;
 import com.android.ide.eclipse.gltrace.GLProtoBuf.GLMessage.Function;
 import com.android.ide.eclipse.gltrace.format.GLAPISpec;
@@ -107,11 +108,19 @@ public class TraceFileParserTask implements IRunnableWithProgress {
                                 msg.hasFb(),
                                 msg.getContextId(),
                                 msg.getDuration(),
-                                msg.getThreadtime(),
-                                StateTransformFactory.getTransformsFor(msg));
+                                msg.getThreadtime());
 
         addProperties(c, msg);
 
+        try {
+            c.setStateTransformations(StateTransformFactory.getTransformsFor(msg));
+        } catch (Exception e) {
+            c.setStateTransformationCreationError(e.getMessage());
+            GlTracePlugin.getDefault().logMessage("Error while creating transformations for "
+                                                        + c.toString() + ":");
+            GlTracePlugin.getDefault().logMessage(e.getMessage());
+        }
+
         mGLCalls.add(c);
         mGLContextIds.add(Integer.valueOf(c.getContextId()));
     }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/DurationMinimap.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/DurationMinimap.java
index a6802c9..7f468e1 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/DurationMinimap.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/DurationMinimap.java
@@ -79,6 +79,7 @@ public class DurationMinimap extends Canvas {
     private Color mBackgroundColor;
     private Color mDurationLineColor;
     private Color mGlDrawColor;
+    private Color mGlErrorColor;
     private Color mContextHeaderColor;
     private Color mVisibleCallsHighlightColor;
     private Color mMouseMarkerColor;
@@ -174,6 +175,8 @@ public class DurationMinimap extends Canvas {
         mContextHeaderColor = new Color(getDisplay(), 0xd1, 0xe5, 0xf0);
         mVisibleCallsHighlightColor = new Color(getDisplay(), 0xcc, 0xcc, 0xcc);
         mMouseMarkerColor = new Color(getDisplay(), 0xaa, 0xaa, 0xaa);
+
+        mGlErrorColor = getDisplay().getSystemColor(SWT.COLOR_RED);
     }
 
     private void disposeColors() {
@@ -301,17 +304,22 @@ public class DurationMinimap extends Canvas {
             boolean resetColor = false;
             GLCall c = mCalls.get(i);
 
-            if (c.getFunction() == Function.glDrawArrays
+            long duration = c.getWallDuration();
+
+            if (c.hasErrors()) {
+                gc.setBackground(mGlErrorColor);
+                resetColor = true;
+
+                // If the call has any errors, we want it to be visible in the minimap
+                // regardless of how long it took.
+                duration = mPositionHelper.getMaxDuration();
+            } else if (c.getFunction() == Function.glDrawArrays
                     || c.getFunction() == Function.glDrawElements
                     || c.getFunction() == Function.eglSwapBuffers) {
                 gc.setBackground(mGlDrawColor);
                 resetColor = true;
-            }
 
-            long duration = c.getWallDuration();
-            if (c.getFunction() == Function.eglSwapBuffers) {
-                // egl swap buffers typically takes very little time, but since
-                // it is a significant call, we explicitly size it to the max length
+                // render all draw calls & swap buffer at max length
                 duration = mPositionHelper.getMaxDuration();
             }
 
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/GLFunctionTraceViewer.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/GLFunctionTraceViewer.java
index 4d1da1f..7a9f167 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/GLFunctionTraceViewer.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/GLFunctionTraceViewer.java
@@ -100,6 +100,7 @@ public class GLFunctionTraceViewer extends EditorPart implements ISelectionProvi
     private GLCallFilter mGLCallFilter;
 
     private Color mGldrawTextColor;
+    private Color mGlCallErrorColor;
 
     // Currently displayed frame's start and end call indices.
     private int mCallStartIndex;
@@ -116,6 +117,7 @@ public class GLFunctionTraceViewer extends EditorPart implements ISelectionProvi
 
     public GLFunctionTraceViewer() {
         mGldrawTextColor = Display.getDefault().getSystemColor(SWT.COLOR_BLUE);
+        mGlCallErrorColor = Display.getDefault().getSystemColor(SWT.COLOR_RED);
     }
 
     @Override
@@ -528,6 +530,10 @@ public class GLFunctionTraceViewer extends EditorPart implements ISelectionProvi
                 cell.setForeground(mGldrawTextColor);
             }
 
+            if (c.hasErrors()) {
+                cell.setForeground(mGlCallErrorColor);
+            }
+
             cell.setText(getColumnText(c, cell.getColumnIndex()));
         }
 
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/StateViewPage.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/StateViewPage.java
index 174e70f..288dc15 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/StateViewPage.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/editors/StateViewPage.java
@@ -16,7 +16,7 @@
 
 package com.android.ide.eclipse.gltrace.editors;
 
-import com.android.ide.eclipse.gldebugger.Activator;
+import com.android.ide.eclipse.gldebugger.GlTracePlugin;
 import com.android.ide.eclipse.gltrace.editors.GLCallGroups.GLCallNode;
 import com.android.ide.eclipse.gltrace.model.GLCall;
 import com.android.ide.eclipse.gltrace.model.GLTrace;
@@ -29,6 +29,7 @@ import org.eclipse.core.runtime.IStatus;
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.ILock;
 import org.eclipse.core.runtime.jobs.Job;
+import org.eclipse.jface.layout.GridDataFactory;
 import org.eclipse.jface.viewers.ISelection;
 import org.eclipse.jface.viewers.ISelectionChangedListener;
 import org.eclipse.jface.viewers.ISelectionProvider;
@@ -82,6 +83,8 @@ public class StateViewPage extends Page implements ISelectionListener, ISelectio
     @Override
     public void createControl(Composite parent) {
         final Tree tree = new Tree(parent, SWT.VIRTUAL | SWT.H_SCROLL | SWT.V_SCROLL);
+        GridDataFactory.fillDefaults().grab(true, true).applyTo(tree);
+
         tree.setHeaderVisible(true);
         tree.setLinesVisible(true);
         tree.setLayoutData(new GridData(GridData.FILL_BOTH));
@@ -154,8 +157,11 @@ public class StateViewPage extends Page implements ISelectionListener, ISelectio
                             selectedCallIndex);
                     mCurrentStateIndex = selectedCallIndex;
                 } catch (Exception e) {
+                    GlTracePlugin.getDefault().logMessage(
+                            "Unexpected error while updating GL State.");
+                    GlTracePlugin.getDefault().logMessage(e.getMessage());
                     return new Status(Status.ERROR,
-                            Activator.PLUGIN_ID,
+                            GlTracePlugin.PLUGIN_ID,
                             "Unexpected error while updating GL State.",
                             e);
                 } finally {
@@ -218,12 +224,18 @@ public class StateViewPage extends Page implements ISelectionListener, ISelectio
         Set<IGLProperty> changedProperties = new HashSet<IGLProperty>(setSizeHint);
 
         for (int i = fromIndex + 1; i <= toIndex; i++) {
-            for (IStateTransform f : mGLCalls.get(i).getStateTransformations()) {
-                f.apply(mState);
-
-                IGLProperty changedProperty = f.getChangedProperty(mState);
-                if (changedProperty != null) {
-                    changedProperties.addAll(getHierarchy(changedProperty));
+            GLCall call = mGLCalls.get(i);
+            for (IStateTransform f : call.getStateTransformations()) {
+                try {
+                    f.apply(mState);
+                    IGLProperty changedProperty = f.getChangedProperty(mState);
+                    if (changedProperty != null) {
+                        changedProperties.addAll(getHierarchy(changedProperty));
+                    }
+                } catch (Exception e) {
+                    GlTracePlugin.getDefault().logMessage("Error applying transformations for "
+                            + call);
+                    GlTracePlugin.getDefault().logMessage(e.getMessage());
                 }
             }
         }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/model/GLCall.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/model/GLCall.java
index d049c9e..aae91c0 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/model/GLCall.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/model/GLCall.java
@@ -23,6 +23,7 @@ import com.android.sdklib.util.SparseArray;
 
 import org.eclipse.swt.graphics.Image;
 
+import java.util.Collections;
 import java.util.List;
 
 /**
@@ -78,15 +79,17 @@ public class GLCall {
     private final int mThreadDuration;
 
     /** List of state transformations performed by this call. */
-    private final List<IStateTransform> mStateTransforms;
+    private List<IStateTransform> mStateTransforms = Collections.emptyList();
+
+    /** Error conditions while creating state transforms for this call. */
+    private String mStateTransformationCreationErrorMessage;
 
     /** List of properties associated to this call. */
     private SparseArray<Object> mProperties;
 
     public GLCall(int index, long startTime, long traceFileOffset, String displayString,
             Image thumbnailImage, Function function, boolean hasFb, int contextId,
-            int wallTime, int threadTime,
-            List<IStateTransform> stateTransforms) {
+            int wallTime, int threadTime) {
         mIndex = index;
         mStartTime = startTime;
         mTraceFileOffset = traceFileOffset;
@@ -97,7 +100,6 @@ public class GLCall {
         mContextId = contextId;
         mWallDuration = wallTime;
         mThreadDuration = threadTime;
-        mStateTransforms = stateTransforms;
     }
 
     public int getIndex() {
@@ -140,6 +142,22 @@ public class GLCall {
         return mThreadDuration;
     }
 
+    public void setStateTransformations(List<IStateTransform> transforms) {
+        mStateTransforms = transforms;
+    }
+
+    public void setStateTransformationCreationError(String errorMessage) {
+        mStateTransformationCreationErrorMessage = errorMessage;
+    }
+
+    public boolean hasErrors() {
+        return mStateTransformationCreationErrorMessage != null;
+    }
+
+    public String getError() {
+        return mStateTransformationCreationErrorMessage;
+    }
+
     public List<IStateTransform> getStateTransformations() {
         return mStateTransforms;
     }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentProgramPropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentProgramPropertyAccessor.java
index b977d87..9cc3cb8 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentProgramPropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentProgramPropertyAccessor.java
@@ -38,6 +38,7 @@ public class CurrentProgramPropertyAccessor implements IGLPropertyAccessor {
                 GLStateType.PROGRAM_STATE,
                 GLStateType.CURRENT_PROGRAM);
     }
+
     @Override
     public IGLProperty getProperty(IGLProperty state) {
         // obtain the current program
@@ -57,4 +58,10 @@ public class CurrentProgramPropertyAccessor implements IGLPropertyAccessor {
                                                Integer.valueOf(mLocation),
                                                mStateType).getProperty(state);
     }
+
+    @Override
+    public String getPath() {
+        return String.format("PROGRAM_STATE/PROGRAMS/${program}/%s/%d/%s",
+                mStateCategory, mLocation, mStateType);
+    }
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentVboPropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentVboPropertyAccessor.java
index 3f763e0..ea7617d 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentVboPropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/CurrentVboPropertyAccessor.java
@@ -63,4 +63,9 @@ public class CurrentVboPropertyAccessor implements IGLPropertyAccessor {
                                                buffer,
                                                mVboProperty).getProperty(state);
     }
+
+    @Override
+    public String getPath() {
+        return String.format("VERTEX_ARRAY_DATA/VBO/${currentBuffer}/%s", mVboProperty);
+    }
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/GLPropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/GLPropertyAccessor.java
index 8772a72..be338be 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/GLPropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/GLPropertyAccessor.java
@@ -45,7 +45,8 @@ public class GLPropertyAccessor implements IGLPropertyAccessor {
         for (GLPropertyExtractor e : mExtractors) {
             IGLProperty successor = e.getProperty(root);
             if (successor == null) {
-                return null;
+                root = null;
+                break;
             }
             root = successor;
         }
@@ -111,7 +112,7 @@ public class GLPropertyAccessor implements IGLPropertyAccessor {
 
         @Override
         public IGLProperty getProperty(IGLProperty p) {
-            if (p instanceof GLListProperty) {
+            if (p instanceof GLListProperty && mIndex >= 0) {
                 return ((GLListProperty) p).get(mIndex);
             }
             if (p instanceof GLSparseArrayProperty) {
@@ -120,4 +121,19 @@ public class GLPropertyAccessor implements IGLPropertyAccessor {
             return null;
         }
     }
+
+    @Override
+    public String getPath() {
+        StringBuilder sb = new StringBuilder(mExtractors.size() * 10);
+        for (GLPropertyExtractor e: mExtractors) {
+            if (e instanceof GLNamePropertyExtractor) {
+                sb.append(((GLNamePropertyExtractor) e).mType);
+            } else {
+                sb.append(((GLIndexPropertyExtractor) e).mIndex);
+            }
+            sb.append('/');
+        }
+
+        return sb.toString();
+    }
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/IGLPropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/IGLPropertyAccessor.java
index 32cda39..5df21b9 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/IGLPropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/IGLPropertyAccessor.java
@@ -23,5 +23,9 @@ import com.android.ide.eclipse.gltrace.state.IGLProperty;
  * a specific property from a composite property.
  */
 public interface IGLPropertyAccessor {
+    /** Obtain a specific property from the given state. */
     IGLProperty getProperty(IGLProperty state);
+
+    /** Returns the string representation of this property accessor. */
+    String getPath();
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/PropertyChangeTransform.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/PropertyChangeTransform.java
index 79014cf..276f6f4 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/PropertyChangeTransform.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/PropertyChangeTransform.java
@@ -64,8 +64,12 @@ public class PropertyChangeTransform implements IStateTransform {
             }
         }
 
-        mOldValue = property.getValue();
-        property.setValue(mNewValue);
+        if (property != null) {
+            mOldValue = property.getValue();
+            property.setValue(mNewValue);
+        } else {
+            throw new RuntimeException("No such property: " + mAccessor.getPath());
+        }
     }
 
     /**
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/StateTransformFactory.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/StateTransformFactory.java
index 5751025..576e87b 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/StateTransformFactory.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/StateTransformFactory.java
@@ -1252,6 +1252,9 @@ public class StateTransformFactory {
         // ..            4i
 
         int location = msg.getArgs(0).getIntValue(0);
+        if (location < 0) {
+            throw new IllegalArgumentException("Argument location cannot be less than 0.");
+        }
         List<?> uniforms;
         if (isFloats) {
             List<Float> args = new ArrayList<Float>(msg.getArgsCount() - 1);
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TexturePropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TexturePropertyAccessor.java
index 7aa8fd6..2116283 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TexturePropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TexturePropertyAccessor.java
@@ -61,4 +61,9 @@ public class TexturePropertyAccessor implements IGLPropertyAccessor {
         return textureAccessor.getProperty(state);
     }
 
+    @Override
+    public String getPath() {
+        return String.format("TEXTURE_STATE/TEXTURES/${activeTexture}/%s", mTextureType);
+    }
+
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TextureUnitPropertyAccessor.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TextureUnitPropertyAccessor.java
index 7c52cd5..2489e14 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TextureUnitPropertyAccessor.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/state/transforms/TextureUnitPropertyAccessor.java
@@ -56,4 +56,9 @@ public class TextureUnitPropertyAccessor implements IGLPropertyAccessor {
                 mTargetType);
         return targetAccessor.getProperty(state);
     }
+
+    @Override
+    public String getPath() {
+        return String.format("TEXTURE_STATE/TEXTURE_UNITS/${activeTextureUnit}/%s", mTargetType);
+    }
 }
diff --git a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/views/FitToCanvasAction.java b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/views/FitToCanvasAction.java
index ccd2cbe..eecd86e 100644
--- a/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/views/FitToCanvasAction.java
+++ b/eclipse/plugins/com.android.ide.eclipse.gldebugger/src/com/android/ide/eclipse/gltrace/views/FitToCanvasAction.java
@@ -16,7 +16,7 @@
 
 package com.android.ide.eclipse.gltrace.views;
 
-import com.android.ide.eclipse.gldebugger.Activator;
+import com.android.ide.eclipse.gldebugger.GlTracePlugin;
 import com.android.ide.eclipse.gltrace.widgets.ImageCanvas;
 
 import org.eclipse.jface.action.Action;
@@ -25,7 +25,7 @@ public class FitToCanvasAction extends Action {
     private ImageCanvas mImageCanvas;
 
     public FitToCanvasAction(boolean fitByDefault, ImageCanvas canvas) {
-        super("Fit to Canvas", Activator.getImageDescriptor("/icons/zoomfit.png")); //$NON-NLS-2$
+        super("Fit to Canvas", GlTracePlugin.getImageDescriptor("/icons/zoomfit.png")); //$NON-NLS-2$
         setToolTipText("Fit Image to Canvas");
         mImageCanvas = canvas;