1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 * This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "PrintTargetPS.h"
11 namespace mozilla::gfx
{
13 static cairo_status_t
write_func(void* closure
, const unsigned char* data
,
14 unsigned int length
) {
15 nsCOMPtr
<nsIOutputStream
> out
= reinterpret_cast<nsIOutputStream
*>(closure
);
18 if (NS_FAILED(out
->Write((const char*)data
, length
, &wrote
))) {
24 NS_ASSERTION(length
== 0, "not everything was written to the file");
25 return CAIRO_STATUS_SUCCESS
;
28 PrintTargetPS::PrintTargetPS(cairo_surface_t
* aCairoSurface
,
29 const IntSize
& aSize
, nsIOutputStream
* aStream
,
30 PageOrientation aOrientation
)
31 : PrintTarget(aCairoSurface
, aSize
),
33 mOrientation(aOrientation
) {}
35 PrintTargetPS::~PrintTargetPS() {
36 // We get called first, then PrintTarget's dtor. That means that mStream
37 // is destroyed before PrintTarget's dtor calls cairo_surface_destroy. This
38 // can be a problem if Finish() hasn't been called on us, since
39 // cairo_surface_destroy will then call cairo_surface_finish and that will
40 // end up invoking write_func above with the by now dangling pointer mStream
41 // that mCairoSurface stored. To prevent that from happening we must call
42 // Flush here before mStream is deleted.
47 already_AddRefed
<PrintTargetPS
> PrintTargetPS::CreateOrNull(
48 nsIOutputStream
* aStream
, IntSize aSizeInPoints
,
49 PageOrientation aOrientation
) {
50 // The PS output does not specify the page size so to print landscape we need
51 // to rotate the drawing 90 degrees and print on portrait paper. If printing
52 // landscape, swap the width/height supplied to cairo to select a portrait
53 // print area. Our consumers are responsible for checking
54 // RotateForLandscape() and applying a rotation transform if true.
55 if (aOrientation
== LANDSCAPE
) {
56 std::swap(aSizeInPoints
.width
, aSizeInPoints
.height
);
59 cairo_surface_t
* surface
= cairo_ps_surface_create_for_stream(
60 write_func
, (void*)aStream
, aSizeInPoints
.width
, aSizeInPoints
.height
);
61 if (cairo_surface_status(surface
)) {
64 cairo_ps_surface_restrict_to_level(surface
, CAIRO_PS_LEVEL_2
);
66 // The new object takes ownership of our surface reference.
67 RefPtr
<PrintTargetPS
> target
=
68 new PrintTargetPS(surface
, aSizeInPoints
, aStream
, aOrientation
);
69 return target
.forget();
72 nsresult
PrintTargetPS::BeginPrinting(const nsAString
& aTitle
,
73 const nsAString
& aPrintToFileName
,
74 int32_t aStartPage
, int32_t aEndPage
) {
75 if (mOrientation
== PORTRAIT
) {
76 cairo_ps_surface_dsc_comment(mCairoSurface
, "%%Orientation: Portrait");
78 cairo_ps_surface_dsc_comment(mCairoSurface
, "%%Orientation: Landscape");
83 nsresult
PrintTargetPS::EndPage() {
84 cairo_surface_show_page(mCairoSurface
);
88 void PrintTargetPS::Finish() {
90 return; // We don't want to call Close() on mStream more than once
92 PrintTarget::Finish();
96 } // namespace mozilla::gfx