diff -r 000000000000 -r 6474c204b198 gfx/thebes/gfxPDFSurface.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gfx/thebes/gfxPDFSurface.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,86 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "gfxPDFSurface.h"
+
+#include "cairo.h"
+#include "cairo-pdf.h"
+
+static cairo_status_t
+write_func(void *closure, const unsigned char *data, unsigned int length)
+{
+    nsCOMPtr<nsIOutputStream> out = reinterpret_cast<nsIOutputStream*>(closure);
+    do {
+        uint32_t wrote = 0;
+        if (NS_FAILED(out->Write((const char*)data, length, &wrote)))
+            break;
+        data += wrote; length -= wrote;
+    } while (length > 0);
+    NS_ASSERTION(length == 0, "not everything was written to the file");
+    return CAIRO_STATUS_SUCCESS;
+}
+
+gfxPDFSurface::gfxPDFSurface(nsIOutputStream *aStream, const gfxSize& aSizeInPoints)
+    : mStream(aStream), mXDPI(-1), mYDPI(-1), mSize(aSizeInPoints)
+{
+    Init(cairo_pdf_surface_create_for_stream(write_func, (void*)mStream, mSize.width, mSize.height));
+}
+
+gfxPDFSurface::~gfxPDFSurface()
+{
+}
+
+nsresult
+gfxPDFSurface::BeginPrinting(const nsAString& aTitle, const nsAString& aPrintToFileName)
+{
+    return NS_OK;
+}
+
+nsresult
+gfxPDFSurface::EndPrinting()
+{
+    return NS_OK;
+}
+
+nsresult
+gfxPDFSurface::AbortPrinting()
+{
+    return NS_OK;
+}
+
+nsresult
+gfxPDFSurface::BeginPage()
+{
+    return NS_OK;
+}
+
+nsresult
+gfxPDFSurface::EndPage()
+{
+    cairo_surface_show_page(CairoSurface());
+    return NS_OK;
+}
+
+void
+gfxPDFSurface::Finish()
+{
+    gfxASurface::Finish();
+    mStream->Close();
+}
+
+void
+gfxPDFSurface::SetDPI(double xDPI, double yDPI)
+{
+    mXDPI = xDPI;
+    mYDPI = yDPI;
+    cairo_surface_set_fallback_resolution(CairoSurface(), xDPI, yDPI);
+}
+
+void
+gfxPDFSurface::GetDPI(double *xDPI, double *yDPI)
+{
+    *xDPI = mXDPI;
+    *yDPI = mYDPI;
+}