From e8fc9bcdcb9ee3f70430f09cb93fcf1af5480007 Mon Sep 17 00:00:00 2001
From: Paolo Cignoni cignoni <paolo.cignoni@isti.cnr.it>
Date: Tue, 29 Nov 2005 11:22:23 +0000
Subject: [PATCH] Added experimental snapshot saving function

---
 src/meshlab/glarea.cpp     | 39 ++++++++++++++++++++++++++++++++++++++
 src/meshlab/glarea.h       |  7 ++++++-
 src/meshlab/mainwindow.cpp | 25 ++++++++++++++++++++++++
 src/meshlab/mainwindow.h   |  2 ++
 4 files changed, 72 insertions(+), 1 deletion(-)

diff --git a/src/meshlab/glarea.cpp b/src/meshlab/glarea.cpp
index b85ac63bf..23fd37d57 100644
--- a/src/meshlab/glarea.cpp
+++ b/src/meshlab/glarea.cpp
@@ -24,6 +24,9 @@
 History
 
 $Log$
+Revision 1.23  2005/11/29 11:22:23  vannini
+Added experimental snapshot saving function
+
 Revision 1.22  2005/11/28 21:05:37  alemochi
 Added menu preferences and configurable background
 
@@ -146,6 +149,7 @@ void GLArea::initializeGL()
  
 	rm.drawMode	= GLW::DMSmooth;
 	rm.drawColor = GLW::CMNone;
+	
 }
 
 void GLArea::paintGL()
@@ -205,6 +209,41 @@ void GLArea::resizeGL(int _width, int _height)
 	glViewport(0,0, _width, _height);
 }
 
+bool GLArea::saveSnapshot(QString path)
+{
+	std::vector<Color4b> snap;
+	int vp[4];
+	int p;
+
+	glGetIntegerv( GL_VIEWPORT,vp );		// Lettura viewport
+	glPixelStorei( GL_PACK_ROW_LENGTH, 0);
+	glPixelStorei( GL_PACK_ALIGNMENT, 1);
+	
+	snap.resize(vp[2] * vp[3]);
+
+	glReadPixels(vp[0],vp[1],vp[2],vp[3],GL_RGBA,GL_UNSIGNED_BYTE,(GLvoid *)&snap[0]);
+	
+	FILE * fp = fopen(path.toLocal8Bit(),"wb");
+	if (fp==0) return false;
+
+	fprintf(fp,"P6\n%d %d\n255\n",vp[2],vp[3]);
+	int j=0;
+
+	for(int py=vp[3]-1; py >= 0; --py)
+	{
+		for(int px=0; px < vp[2]; ++px)
+		{
+			p=py * vp[2] + px;
+			fwrite(&(snap[p]),3,1,fp);
+			//printf("%d %d\n",px, py);
+		}
+	}
+	
+	fclose(fp);
+
+	return true;
+}
+
 Trackball::Button QT2VCG(Qt::MouseButton qtbt,  Qt::KeyboardModifiers modifiers)
 {
 	int vcgbt=Trackball::BUTTON_NONE;
diff --git a/src/meshlab/glarea.h b/src/meshlab/glarea.h
index 8a32d121e..21a32a75a 100644
--- a/src/meshlab/glarea.h
+++ b/src/meshlab/glarea.h
@@ -24,6 +24,9 @@
   History
 
 $Log$
+Revision 1.14  2005/11/29 11:22:23  vannini
+Added experimental snapshot saving function
+
 Revision 1.13  2005/11/28 21:05:37  alemochi
 Added menu preferences and configurable background
 
@@ -133,6 +136,7 @@ public:
 	void setColorMode(vcg::GLW::ColorMode mode);
 	void setLight(bool state);
 	void setLightMode(bool state,LightingModel lmode);
+	bool saveSnapshot(QString path);
   inline void RenderLight();
   list<pair<QAction *,MeshRenderInterface *> > *iRendersList;
 protected:
@@ -145,7 +149,8 @@ protected:
 	void mouseReleaseEvent(QMouseEvent *event);
 	void wheelEvent(QWheelEvent*e);
 
-  
+	
+
 private:
   RenderMode rm;
 	Point3f bColor;
diff --git a/src/meshlab/mainwindow.cpp b/src/meshlab/mainwindow.cpp
index c868efd23..2ef3dc9b0 100644
--- a/src/meshlab/mainwindow.cpp
+++ b/src/meshlab/mainwindow.cpp
@@ -24,6 +24,9 @@
 History
 
 $Log$
+Revision 1.44  2005/11/29 11:22:23  vannini
+Added experimental snapshot saving function
+
 Revision 1.43  2005/11/28 21:05:37  alemochi
 Added menu preferences and configurable background
 
@@ -256,6 +259,19 @@ bool MainWindow::saveAs()
 	}
 }
 
+bool MainWindow::saveSnapshot()
+{
+	QString snapshotPath = "snapshot.ppm";
+
+	bool ret=GLA()->saveSnapshot(snapshotPath);
+
+	if (ret) 
+		GLA()->log.Log(GLLogStream::Info,"Snapshot saved to %s",snapshotPath.toLocal8Bit().constData());
+	else
+		GLA()->log.Log(GLLogStream::Error,"Error saving snapshot %s",snapshotPath.toLocal8Bit().constData());
+
+	return ret;
+}
 void MainWindow::about()
 {
 	QMessageBox::about(this, tr("About Plug & Paint"),
@@ -280,6 +296,11 @@ void MainWindow::createActions()
 	saveAsAct->setShortcut(tr("Ctrl+S"));
 	connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
 
+	saveSnapshotAct = new QAction(QIcon(":/images/save.png"),tr("&Save snapshot"), this);
+	connect(saveSnapshotAct, SIGNAL(triggered()), this, SLOT(saveSnapshot()));
+
+
+
 	for (int i = 0; i < MAXRECENTFILES; ++i) {
 		recentFileActs[i] = new QAction(this);
 		recentFileActs[i]->setVisible(false);
@@ -393,6 +414,7 @@ void MainWindow::createToolBars()
 	mainToolBar->setIconSize(QSize(32,32));
 	mainToolBar->addAction(openAct);
 	mainToolBar->addAction(saveAsAct);
+	mainToolBar->addAction(saveSnapshotAct);
 
 	renderToolBar = addToolBar(tr("Render"));
 	renderToolBar->setIconSize(QSize(32,32));
@@ -406,6 +428,8 @@ void MainWindow::createMenus()
 	fileMenu = menuBar()->addMenu(tr("&File"));
 	fileMenu->addAction(openAct);
 	fileMenu->addAction(saveAsAct);
+	fileMenu->addAction(saveSnapshotAct);
+
 	separatorAct = fileMenu->addSeparator();
 	for (int i = 0; i < MAXRECENTFILES; ++i) fileMenu->addAction(recentFileActs[i]);
 	updateRecentFileActions();
@@ -767,6 +791,7 @@ void MainWindow::updateMenus()
 {
 	bool active = (bool)workspace->activeWindow();
 	saveAsAct->setEnabled(active);
+	saveSnapshotAct->setEnabled(active);
 	filterMenu->setEnabled(active && !filterMenu->actions().isEmpty());
 	renderMenu->setEnabled(active);
   windowsMenu->setEnabled(active);
diff --git a/src/meshlab/mainwindow.h b/src/meshlab/mainwindow.h
index e0a7d9e2a..c5e7b0de8 100644
--- a/src/meshlab/mainwindow.h
+++ b/src/meshlab/mainwindow.h
@@ -50,6 +50,7 @@ private slots:
 	void open(QString fileName=QString());
 	void openRecentFile();							
 	bool saveAs();
+	bool saveSnapshot();
 	void about();
 	
 	// Plugin Slots ///////////
@@ -121,6 +122,7 @@ private:
 	
 	QAction *openAct;
 	QAction *saveAsAct;
+	QAction *saveSnapshotAct;
 	
 	QActionGroup *renderModeGroup;