--- a/gfx/src/nsDeviceContext.cpp
+++ b/gfx/src/nsDeviceContext.cpp
@@ -233,19 +233,23 @@ nsDeviceContext::FontMetricsDeleted(cons
 {
     if (mFontCache) {
         mFontCache->FontMetricsDeleted(aFontMetrics);
     }
     return NS_OK;
 }
 
 bool
-nsDeviceContext::IsPrinterSurface()
+nsDeviceContext::IsPrinterContext()
 {
-    return mPrintTarget != nullptr;
+  return mPrintTarget != nullptr
+#ifdef XP_MACOSX
+         || mCachedPrintTarget != nullptr
+#endif
+         ;
 }
 
 void
 nsDeviceContext::SetDPI(double* aScale)
 {
     float dpi = -1.0f;
 
     // Use the printing DC to determine DPI values, if we have one.
@@ -323,17 +327,17 @@ nsDeviceContext::Init(nsIWidget *aWidget
 
     return rv;
 }
 
 // XXX This is only for printing. We should make that obvious in the name.
 already_AddRefed<gfxContext>
 nsDeviceContext::CreateRenderingContext()
 {
-    MOZ_ASSERT(IsPrinterSurface());
+    MOZ_ASSERT(IsPrinterContext());
     MOZ_ASSERT(mWidth > 0 && mHeight > 0);
 
     RefPtr<PrintTarget> printingTarget = mPrintTarget;
 #ifdef XP_MACOSX
     // CreateRenderingContext() can be called (on reflow) after EndPage()
     // but before BeginPage().  On OS X (and only there) mPrintTarget
     // will in this case be null, because OS X printing surfaces are
     // per-page, and therefore only truly valid between calls to BeginPage()
@@ -393,50 +397,47 @@ nsDeviceContext::GetDepth(uint32_t& aDep
 
     aDepth = mDepth;
     return NS_OK;
 }
 
 nsresult
 nsDeviceContext::GetDeviceSurfaceDimensions(nscoord &aWidth, nscoord &aHeight)
 {
-    if (mPrintTarget) {
-        // we have a printer device
+    if (IsPrinterContext()) {
         aWidth = mWidth;
         aHeight = mHeight;
     } else {
         nsRect area;
         ComputeFullAreaUsingScreen(&area);
         aWidth = area.width;
         aHeight = area.height;
     }
 
     return NS_OK;
 }
 
 nsresult
 nsDeviceContext::GetRect(nsRect &aRect)
 {
-    if (mPrintTarget) {
-        // we have a printer device
+    if (IsPrinterContext()) {
         aRect.x = 0;
         aRect.y = 0;
         aRect.width = mWidth;
         aRect.height = mHeight;
     } else
         ComputeFullAreaUsingScreen ( &aRect );
 
     return NS_OK;
 }
 
 nsresult
 nsDeviceContext::GetClientRect(nsRect &aRect)
 {
-    if (mPrintTarget) {
-        // we have a printer device
+    if (IsPrinterContext()) {
         aRect.x = 0;
         aRect.y = 0;
         aRect.width = mWidth;
         aRect.height = mHeight;
     }
     else
         ComputeClientRectUsingScreen(&aRect);
 

--- a/gfx/src/nsDeviceContext.h
+++ b/gfx/src/nsDeviceContext.h
@@ -249,17 +249,17 @@ public:
     /**
      * Returns the page full zoom factor applied.
      */
     float GetFullZoom() const { return mFullZoom; }
 
     /**
      * True if this device context was created for printing.
      */
-    bool IsPrinterSurface();
+    bool IsPrinterContext();
 
     mozilla::DesktopToLayoutDeviceScale GetDesktopToDeviceScale();
 
 private:
     // Private destructor, to discourage deletion outside of Release():
     ~nsDeviceContext();
 
     void SetDPI(double* aScale = nullptr);

--- a/gfx/src/nsFontMetrics.cpp
+++ b/gfx/src/nsFontMetrics.cpp
@@ -124,17 +124,17 @@ nsFontMetrics::nsFontMetrics(const nsFon
     gfxFontStyle style(aFont.style,
                        aFont.weight,
                        aFont.stretch,
                        gfxFloat(aFont.size) / mP2A,
                        aParams.language,
                        aParams.explicitLanguage,
                        aFont.sizeAdjust,
                        aFont.systemFont,
-                       mDeviceContext->IsPrinterSurface(),
+                       mDeviceContext->IsPrinterContext(),
                        aFont.synthesis & NS_FONT_SYNTHESIS_WEIGHT,
                        aFont.synthesis & NS_FONT_SYNTHESIS_STYLE,
                        aFont.languageOverride);
 
     aFont.AddFontFeaturesToStyle(&style);
 
     gfxFloat devToCssSize = gfxFloat(mP2A) /
         gfxFloat(mDeviceContext->AppUnitsPerCSSPixel());