Bug 389949, second patch: rotate landscape-mode printed output in Linux. (so we don't end up printing landscape-oriented content on top of portrait-oriented paper.) r+sr=vlad a=blocking1.9

layout/generic/nsSimplePageSequence.cpp

@@ -38,6 +38,7 @@
 #include "nsReadableUtils.h"
 #include "nsSimplePageSequence.h"
 #include "nsPresContext.h"
+#include "gfxContext.h"
 #include "nsIRenderingContext.h"
 #include "nsGkAtoms.h"
 #include "nsIDeviceContext.h"
@@ -619,6 +620,20 @@ nsSimplePageSequenceFrame::PrintNextPage()
       PresContext()->PresShell()->
               CreateRenderingContext(mCurrentPageFrame,
                                      getter_AddRefs(renderingContext));
+
+#if defined(XP_UNIX) && !defined(XP_MACOSX)
+      // On linux, need to rotate landscape-mode output on printed surfaces
+      PRInt32 orientation;
+      mPageData->mPrintSettings->GetOrientation(&orientation);
+      if (nsIPrintSettings::kLandscapeOrientation == orientation) {
+        // Shift up by one landscape-page-height (in points) before we rotate.
+        float offset = POINTS_PER_INCH_FLOAT *
+           (mCurrentPageFrame->GetSize().height / float(dc->AppUnitsPerInch()));
+        renderingContext->ThebesContext()->Translate(gfxPoint(offset, 0));
+        renderingContext->ThebesContext()->Rotate(M_PI/2);
+      }
+#endif // XP_UNIX && !XP_MACOSX
+
       nsRect drawingRect(nsPoint(0, 0),
                          mCurrentPageFrame->GetSize());
       nsRegion drawingRegion(drawingRect);

layout/printing/nsPrintEngine.cpp

@@ -1871,7 +1871,20 @@ nsPrintEngine::ReflowPrintObject(nsPrintObject * aPO)
   } else {
     nscoord pageWidth, pageHeight;
     mPrt->mPrintDC->GetDeviceSurfaceDimensions(pageWidth, pageHeight);
+#if defined(XP_UNIX) && !defined(XP_MACOSX)
+    // If we're in landscape mode on Linux, the device surface will have 
+    // been rotated, so for the purposes of reflowing content, we'll 
+    // treat device's height as our width and its width as our height, 
+    PRInt32 orientation;
+    mPrt->mPrintSettings->GetOrientation(&orientation);
+    if (nsIPrintSettings::kLandscapeOrientation == orientation) {
+      adjSize = nsSize(pageHeight, pageWidth);
+    } else {
+      adjSize = nsSize(pageWidth, pageHeight);
+    }
+#else
     adjSize = nsSize(pageWidth, pageHeight);
+#endif // XP_UNIX && !XP_MACOSX
     documentIsTopLevel = PR_TRUE;
   }
 

widget/src/gtk2/nsDeviceContextSpecG.cpp

@@ -417,6 +417,17 @@ NS_IMETHODIMP nsDeviceContextSpecGTK::GetSurfaceForPrinter(gfxASurface **aSurfac
 
   double width, height;
   mPrintSettings->GetEffectivePageSize(&width, &height);
+
+  // If we're in landscape mode, we'll be rotating the output --
+  // need to swap width & height.
+  PRInt32 orientation;
+  mPrintSettings->GetOrientation(&orientation);
+  if (nsIPrintSettings::kLandscapeOrientation == orientation) {
+    double tmp = width;
+    width = height;
+    height = tmp;
+  }
+
   // convert twips to points
   width  /= TWIPS_PER_POINT_FLOAT;
   height /= TWIPS_PER_POINT_FLOAT;