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kwin/plugins/platforms/virtual/scene_qpainter_virtual_backend.h

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[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
/********************************************************************
KWin - the KDE window manager
This file is part of the KDE project.
Copyright (C) 2015 Martin Gräßlin <mgraesslin@kde.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*********************************************************************/
[backends/virtual] Fix include guards Kudos to kbroulik for telling me, that I cannot copy'n'paste.
2015-12-10 14:19:19 +00:00
#ifndef KWIN_SCENE_QPAINTER_VIRTUAL_BACKEND_H
#define KWIN_SCENE_QPAINTER_VIRTUAL_BACKEND_H
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
Move QPainter compositor into plugin This change is similar to D7232 and moves the scene_qpainter into a dedicated plugin. Compared to the XRender case it's more complicated as the platform plugins need to implement a platform specific backend. The base implementation for this part used to be in scene_qpainter. As the idea is to completly move it away from KWin core it would be point less to still have the backend definition in KWin core, but it cannot be in the scene plugin as otherwise all platforms need to link the plugin. To solve this a new platformsupport subdirectory is added which contains the scene platform backend as a static library. For the OpenGL scene such a static library will also be required. Test Plan: SceneQPainter test still passes, nested compositor still works Reviewers: #kwin, #plasma Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D7259
2017-08-11 19:40:49 +00:00
#include <platformsupport/scenes/qpainter/backend.h>
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
#include <QObject>
Move QPainter compositor into plugin This change is similar to D7232 and moves the scene_qpainter into a dedicated plugin. Compared to the XRender case it's more complicated as the platform plugins need to implement a platform specific backend. The base implementation for this part used to be in scene_qpainter. As the idea is to completly move it away from KWin core it would be point less to still have the backend definition in KWin core, but it cannot be in the scene plugin as otherwise all platforms need to link the plugin. To solve this a new platformsupport subdirectory is added which contains the scene platform backend as a static library. For the OpenGL scene such a static library will also be required. Test Plan: SceneQPainter test still passes, nested compositor still works Reviewers: #kwin, #plasma Subscribers: plasma-devel Tags: #plasma Differential Revision: https://phabricator.kde.org/D7259
2017-08-11 19:40:49 +00:00
#include <QVector>
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
namespace KWin
{
class VirtualBackend;
class VirtualQPainterBackend : public QObject, public QPainterBackend
{
Q_OBJECT
public:
VirtualQPainterBackend(VirtualBackend *backend);
virtual ~VirtualQPainterBackend();
QImage *buffer() override;
Convert virtual backend to per screen rendering Summary: Output scaling can't ever work on a single buffer; especially if they're different scales and overlapping. This ports the virtual backend to perScreenRendering so that I can use it for tests. ctest fails here, but it fails on the tests that it failed on before.. Reviewers: #plasma Subscribers: plasma-devel, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D3306
2016-11-07 23:46:50 +00:00
QImage *bufferForScreen(int screenId) override;
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
bool needsFullRepaint() const override;
bool usesOverlayWindow() const override;
void prepareRenderingFrame() override;
void present(int mask, const QRegion &damage) override;
Convert virtual backend to per screen rendering Summary: Output scaling can't ever work on a single buffer; especially if they're different scales and overlapping. This ports the virtual backend to perScreenRendering so that I can use it for tests. ctest fails here, but it fails on the tests that it failed on before.. Reviewers: #plasma Subscribers: plasma-devel, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D3306
2016-11-07 23:46:50 +00:00
bool perScreenRendering() const override;
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
private:
Convert virtual backend to per screen rendering Summary: Output scaling can't ever work on a single buffer; especially if they're different scales and overlapping. This ports the virtual backend to perScreenRendering so that I can use it for tests. ctest fails here, but it fails on the tests that it failed on before.. Reviewers: #plasma Subscribers: plasma-devel, kwin Tags: #kwin Differential Revision: https://phabricator.kde.org/D3306
2016-11-07 23:46:50 +00:00
void createOutputs();
QVector<QImage> m_backBuffers;
[wayland] Add a virtual framebuffer backend A new backend which doesn't present the rendered output. It uses a QPainter scene, renders to a QImage but doesn't present it anywhere. Thus a real virtual backend. By exporting the environment variable KWIN_WAYLAND_VIRTUAL_SCREENSHOTS the backend creates a temporary dir, prints the path to std-out and saves each rendered frame into that directory. Of course with exit it will be deleted again.
2015-10-02 08:44:29 +00:00
VirtualBackend *m_backend;
int m_frameCounter = 0;
};
}
#endif
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