[simspark-svn] SF.net SVN: simspark:[237] trunk/spark/plugin/imageperceptor

[<yx...@us...>]

Revision: 237
          http://simspark.svn.sourceforge.net/simspark/?rev=237&view=rev
Author:   yxu
Date:     2010-12-17 00:22:35 +0000 (Fri, 17 Dec 2010)

Log Message:
-----------
render the image for camera only when it is requested

Modified Paths:
--------------
    trunk/spark/plugin/imageperceptor/imageperceptor.cpp
    trunk/spark/plugin/imageperceptor/imagerender.cpp
    trunk/spark/plugin/imageperceptor/imagerender.h

Modified: trunk/spark/plugin/imageperceptor/imageperceptor.cpp
===================================================================
--- trunk/spark/plugin/imageperceptor/imageperceptor.cpp	2010-12-17 00:22:16 UTC (rev 236)
+++ trunk/spark/plugin/imageperceptor/imageperceptor.cpp	2010-12-17 00:22:35 UTC (rev 237)
@@ -64,22 +64,29 @@
 }
 
 bool ImagePerceptor::Percept(boost::shared_ptr<PredicateList> predList)
-{  
-    Predicate &predicate = predList->AddPredicate();
-    predicate.name = "IMG";
-    predicate.parameter.Clear();
-    
-     ParameterList &sizeElement = predicate.parameter.AddList();
-     sizeElement.AddValue(std::string("s"));
-     sizeElement.AddValue(mRender->GetWidth());
-     sizeElement.AddValue(mRender->GetHeight());
+{
+  mRender->RequestRender();
 
-     ParameterList &dataElement = predicate.parameter.AddList();
-     dataElement.AddValue(std::string("d"));
-     const char* data = mRender->GetData();
-     string datacode = mB64Encoder.encode(data, mRender->GetDataSize());
-     dataElement.AddValue(datacode);
-     return true;
+  int size = mRender->GetDataSize();
+  if (size == 0)
+    return false;
+
+  Predicate &predicate = predList->AddPredicate();
+  predicate.name = "IMG";
+  predicate.parameter.Clear();
+
+  ParameterList &sizeElement = predicate.parameter.AddList();
+  sizeElement.AddValue(std::string("s"));
+  sizeElement.AddValue(mRender->GetWidth());
+  sizeElement.AddValue(mRender->GetHeight());
+
+  ParameterList &dataElement = predicate.parameter.AddList();
+  dataElement.AddValue(std::string("d"));
+  const char* data = mRender->GetData();
+  string datacode = mB64Encoder.encode(data, size);
+  dataElement.AddValue(datacode);
+
+  return true;
 }
 
 void ImagePerceptor::SetViewport(unsigned int x, unsigned int y, unsigned int w, unsigned int h)

Modified: trunk/spark/plugin/imageperceptor/imagerender.cpp
===================================================================
--- trunk/spark/plugin/imageperceptor/imagerender.cpp	2010-12-17 00:22:16 UTC (rev 236)
+++ trunk/spark/plugin/imageperceptor/imagerender.cpp	2010-12-17 00:22:35 UTC (rev 237)
@@ -42,8 +42,8 @@
 using namespace salt;
 using namespace std;
 
-ImageRender::ImageRender(): // kerosin::CustomRender(),
-  mDataSize(0), mWidth(0), mHeight(0)
+ImageRender::ImageRender(): kerosin::CustomRender(),
+  mDataSize(0), mWidth(0), mHeight(0), mRequested(false)
 {
 }
 
@@ -98,7 +98,7 @@
 
 void ImageRender::Render()
 {
-    if (
+    if ( (!mRequested) ||
         (mOpenGLServer.expired()) ||
         (mRenderServer.expired())
         )
@@ -166,4 +166,5 @@
 #endif
     mRenderServer->SetCamera(oldCamera);
 
+    mRequested = false;
 }

Modified: trunk/spark/plugin/imageperceptor/imagerender.h
===================================================================
--- trunk/spark/plugin/imageperceptor/imagerender.h	2010-12-17 00:22:16 UTC (rev 236)
+++ trunk/spark/plugin/imageperceptor/imagerender.h	2010-12-17 00:22:35 UTC (rev 237)
@@ -51,6 +51,8 @@
   
   int GetHeight() const { return mHeight; }
 
+  void RequestRender() { mRequested = true; }
+
 private:
   boost::shared_ptr<oxygen::Camera> mCamera;
 
@@ -64,6 +66,7 @@
   int mDataSize;
   int mWidth;
   int mHeight;
+  bool mRequested;
 
   unsigned int mFBOId;
   unsigned int mRBOId;


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