modified pixel data storage order

src/GlrRenW.cc

@@ -733,7 +733,7 @@ unsigned char *vtkGlrRenderWindow::GetPixelData(int x1, int y1, int x2, int y2,
     readsource(SRC_BACK);
     }
   p_data = data;
-  for (yloop = y_hi; yloop >= y_low; yloop--)
+  for (yloop = y_low; yloop <= y_hi; yloop++)
     {
     // read in a row of pixels 
     lrectread(x_low,yloop,x_hi,yloop,buffer);
@@ -803,7 +803,7 @@ void vtkGlrRenderWindow::SetPixelData(int x1, int y1, int x2, int y2,
 
   /* now write the binary info one row at a time */
   p_data = data;
-  for (yloop = y_hi; yloop >= y_low; yloop--)
+  for (yloop = y_low; yloop <= y_hi; yloop++)
     {
     for (xloop = 0; xloop <= (abs(x2-x1)); xloop++)
       {

src/OglrRenW.cc

@@ -661,10 +661,11 @@ unsigned char *vtkOglrRenderWindow::GetPixelData(int x1, int y1, int x2, int y2,
     glReadBuffer(GL_BACK);
     }
   p_data = data;
-  for (yloop = y_hi; yloop >= y_low; yloop--)
+  for (yloop = y_low; yloop <= y_hi; yloop++)
     {
     // read in a row of pixels 
-    glReadPixels(x_low,yloop,(x_hi-x_low+1),1, GL_RGBA, GL_UNSIGNED_BYTE, buffer);
+    glReadPixels(x_low,yloop,(x_hi-x_low+1),1, 
+		 GL_RGBA, GL_UNSIGNED_BYTE, buffer);
     for (xloop = 0; xloop <= (abs(x2-x1)); xloop++)
       {
       *p_data = (buffer[xloop] & (0xff000000)) >> 24; p_data++;
@@ -725,7 +726,7 @@ void vtkOglrRenderWindow::SetPixelData(int x1, int y1, int x2, int y2,
   
   // now write the binary info one row at a time 
   p_data = data;
-  for (yloop = y_hi; yloop >= y_low; yloop--)
+  for (yloop = y_low; yloop <= y_hi; yloop++)
     {
     for (xloop = 0; xloop <= (abs(x2-x1)); xloop++)
       {

src/SbrRenW.cc

@@ -1059,7 +1059,8 @@ int front)
 
   /* now read the binary info one row at a time */
   p_data = data;
-  for (yloop = y_low; yloop <= y_hi; yloop++)
+  for (yloop = (this->Size[1] - y_hi - 1); 
+       yloop <= (this->Size[1] - y_low -1); yloop++)
     {
     if (this->NumPlanes == 24)
       {
@@ -1235,7 +1236,8 @@ void vtkSbrRenderWindow::SetPixelData(int x1, int y1, int x2, int y2,
   
   /* now write the binary info one row at a time */
   p_data = data;
-  for (yloop = y_low; yloop <= y_hi; yloop++)
+  for (yloop = (this->Size[1] - y_hi - 1); 
+       yloop <= (this->Size[1] - y_low -1); yloop++)
     {
     if (this->NumPlanes == 24)
       {

src/XglrRenW.cc

@@ -853,7 +853,8 @@ unsigned char *vtkXglrRenderWindow::GetPixelData(int x1, int y1,
 
   /* now write the binary info one row at a time */
   p_data = data;
-  for (yloop = y_low; yloop <= y_hi; yloop++)
+  for (yloop = (this->Size[1] - y_hi - 1); 
+       yloop <= (this->Size[1] - y_low -1); yloop++)
     {
     for (xloop = 0; xloop <= (abs(x2-x1)); xloop++)
       {
@@ -922,7 +923,8 @@ void vtkXglrRenderWindow::SetPixelData(int x1, int y1, int x2, int y2,
 
   // now write the binary info one row at a time 
   p_data = data;
-  for (yloop = y_low; yloop <= y_hi; yloop++)
+  for (yloop = (this->Size[1] - y_hi - 1); 
+       yloop <= (this->Size[1] - y_low -1); yloop++)
     {
     pos.y = yloop;
     for (xloop = 0; xloop <= (abs(x2-x1)); xloop++)