1 files changed, 110 insertions, 0 deletions
diff --git a/gfx/thebes/PrintTargetPS.cpp b/gfx/thebes/PrintTargetPS.cpp
new file mode 100644
index 000000000..5ea75a56c
--- /dev/null
+++ b/gfx/thebes/PrintTargetPS.cpp
@@ -0,0 +1,110 @@
+/* -*- 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 "PrintTargetPS.h"
+
+#include "cairo.h"
+#include "cairo-ps.h"
+
+namespace mozilla {
+namespace gfx {
+
+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;
+}
+
+PrintTargetPS::PrintTargetPS(cairo_surface_t* aCairoSurface,
+                             const IntSize& aSize,
+                             nsIOutputStream *aStream,
+                             PageOrientation aOrientation)
+  : PrintTarget(aCairoSurface, aSize)
+  , mStream(aStream)
+  , mOrientation(aOrientation)
+{
+}
+
+PrintTargetPS::~PrintTargetPS()
+{
+  // We get called first, then PrintTarget's dtor.  That means that mStream
+  // is destroyed before PrintTarget's dtor calls cairo_surface_destroy.  This
+  // can be a problem if Finish() hasn't been called on us, since
+  // cairo_surface_destroy will then call cairo_surface_finish and that will
+  // end up invoking write_func above with the by now dangling pointer mStream
+  // that mCairoSurface stored.  To prevent that from happening we must call
+  // Flush here before mStream is deleted.
+  Finish();
+}
+
+/* static */ already_AddRefed<PrintTargetPS>
+PrintTargetPS::CreateOrNull(nsIOutputStream *aStream,
+                            IntSize aSizeInPoints,
+                            PageOrientation aOrientation)
+{
+  // The PS output does not specify the page size so to print landscape we need
+  // to rotate the drawing 90 degrees and print on portrait paper.  If printing
+  // landscape, swap the width/height supplied to cairo to select a portrait
+  // print area.  Our consumers are responsible for checking
+  // RotateForLandscape() and applying a rotation transform if true.
+  if (aOrientation == LANDSCAPE) {
+    Swap(aSizeInPoints.width, aSizeInPoints.height);
+  }
+
+  cairo_surface_t* surface =
+    cairo_ps_surface_create_for_stream(write_func, (void*)aStream,
+                                       aSizeInPoints.width,
+                                       aSizeInPoints.height);
+  if (cairo_surface_status(surface)) {
+    return nullptr;
+  }
+  cairo_ps_surface_restrict_to_level(surface, CAIRO_PS_LEVEL_2);
+
+  // The new object takes ownership of our surface reference.
+  RefPtr<PrintTargetPS> target = new PrintTargetPS(surface, aSizeInPoints,
+                                                   aStream, aOrientation);
+  return target.forget();
+}
+
+nsresult
+PrintTargetPS::BeginPrinting(const nsAString& aTitle,
+                             const nsAString& aPrintToFileName)
+{
+  if (mOrientation == PORTRAIT) {
+    cairo_ps_surface_dsc_comment(mCairoSurface, "%%Orientation: Portrait");
+  } else {
+    cairo_ps_surface_dsc_comment(mCairoSurface, "%%Orientation: Landscape");
+  }
+  return NS_OK;
+}
+
+nsresult
+PrintTargetPS::EndPage()
+{
+  cairo_surface_show_page(mCairoSurface);
+  return NS_OK;
+}
+
+void
+PrintTargetPS::Finish()
+{
+  if (mIsFinished) {
+    return; // We don't want to call Close() on mStream more than once
+  }
+  PrintTarget::Finish();
+  mStream->Close();
+}
+
+} // namespace gfx
+} // namespace mozilla