VirtualBox

source: vbox/trunk/src/VBox/Frontends/VirtualBox/src/runtime/UIFrameBuffer.h@ 103977

Last change on this file since 103977 was 98848, checked in by vboxsync, 21 months ago

FE/Qt: bugref:10322: Runtime UI: Small cleanup for UIFrameBuffer class.

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1/* $Id: UIFrameBuffer.h 98848 2023-03-07 07:55:33Z vboxsync $ */
2/** @file
3 * VBox Qt GUI - UIFrameBuffer class declaration.
4 */
5
6/*
7 * Copyright (C) 2010-2023 Oracle and/or its affiliates.
8 *
9 * This file is part of VirtualBox base platform packages, as
10 * available from https://www.virtualbox.org.
11 *
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation, in version 3 of the
15 * License.
16 *
17 * This program is distributed in the hope that it will be useful, but
18 * WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20 * General Public License for more details.
21 *
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, see <https://www.gnu.org/licenses>.
24 *
25 * SPDX-License-Identifier: GPL-3.0-only
26 */
27
28#ifndef FEQT_INCLUDED_SRC_runtime_UIFrameBuffer_h
29#define FEQT_INCLUDED_SRC_runtime_UIFrameBuffer_h
30#ifndef RT_WITHOUT_PRAGMA_ONCE
31# pragma once
32#endif
33
34/* Qt includes: */
35#include <QSize>
36
37/* GUI includes: */
38#include "UIExtraDataDefs.h"
39
40/* Other VBox includes: */
41#include <VBox/com/ptr.h>
42
43/* Forward declarations: */
44class UIFrameBufferPrivate;
45class UIMachineView;
46class QResizeEvent;
47class QPaintEvent;
48class QRegion;
49
50/** IFramebuffer implementation used to maintain VM display video memory. */
51class UIFrameBuffer : public QObject
52{
53 Q_OBJECT;
54
55public:
56
57 /** Constructs frame-buffer. */
58 UIFrameBuffer();
59 /** Destructs frame-buffer. */
60 virtual ~UIFrameBuffer() RT_OVERRIDE;
61
62 /** Frame-buffer initialization.
63 * @param pMachineView defines machine-view this frame-buffer is bounded to. */
64 HRESULT init(UIMachineView *pMachineView);
65 /** Returns whether frame-buffer was initialized already. */
66 bool isInitialized() const { return m_fInitialized; }
67
68 /** Assigns machine-view frame-buffer will be bounded to.
69 * @param pMachineView defines machine-view this frame-buffer is bounded to. */
70 void setView(UIMachineView *pMachineView);
71
72 /** Attach frame-buffer to the Display. */
73 void attach();
74 /** Detach frame-buffer from the Display. */
75 void detach();
76
77 /** Returns frame-buffer data address. */
78 uchar *address();
79 /** Returns frame-buffer width. */
80 ulong width() const;
81 /** Returns frame-buffer height. */
82 ulong height() const;
83 /** Returns frame-buffer bits-per-pixel value. */
84 ulong bitsPerPixel() const;
85 /** Returns frame-buffer bytes-per-line value. */
86 ulong bytesPerLine() const;
87
88 /** Defines whether frame-buffer is <b>unused</b>.
89 * @note Calls to this and any other EMT callback are synchronized (from GUI side). */
90 void setMarkAsUnused(bool fUnused);
91
92 /** Returns the frame-buffer's scaled-size. */
93 QSize scaledSize() const;
94 /** Defines host-to-guest scale ratio as @a size. */
95 void setScaledSize(const QSize &size = QSize());
96 /** Returns x-origin of the guest (actual) content corresponding to x-origin of host (scaled) content. */
97 int convertHostXTo(int iX) const;
98 /** Returns y-origin of the guest (actual) content corresponding to y-origin of host (scaled) content. */
99 int convertHostYTo(int iY) const;
100
101 /** Returns the scale-factor used by the frame-buffer. */
102 double scaleFactor() const;
103 /** Define the scale-factor used by the frame-buffer. */
104 void setScaleFactor(double dScaleFactor);
105
106 /** Returns device-pixel-ratio set for HiDPI frame-buffer. */
107 double devicePixelRatio() const;
108 /** Defines device-pixel-ratio set for HiDPI frame-buffer. */
109 void setDevicePixelRatio(double dDevicePixelRatio);
110 /** Returns actual device-pixel-ratio set for HiDPI frame-buffer. */
111 double devicePixelRatioActual() const;
112 /** Defines actual device-pixel-ratio set for HiDPI frame-buffer. */
113 void setDevicePixelRatioActual(double dDevicePixelRatioActual);
114
115 /** Returns whether frame-buffer should use unscaled HiDPI output. */
116 bool useUnscaledHiDPIOutput() const;
117 /** Defines whether frame-buffer should use unscaled HiDPI output. */
118 void setUseUnscaledHiDPIOutput(bool fUseUnscaledHiDPIOutput);
119
120 /** Returns the frame-buffer scaling optimization type. */
121 ScalingOptimizationType scalingOptimizationType() const;
122 /** Defines the frame-buffer scaling optimization type. */
123 void setScalingOptimizationType(ScalingOptimizationType type);
124
125 /** Handles frame-buffer notify-change-event. */
126 void handleNotifyChange(int iWidth, int iHeight);
127 /** Handles frame-buffer paint-event. */
128 void handlePaintEvent(QPaintEvent *pEvent);
129 /** Handles frame-buffer set-visible-region-event. */
130 void handleSetVisibleRegion(const QRegion &region);
131
132 /** Performs frame-buffer resizing. */
133 void performResize(int iWidth, int iHeight);
134 /** Performs frame-buffer rescaling. */
135 void performRescale();
136
137 /** Handles viewport resize-event. */
138 void viewportResized(QResizeEvent *pEvent);
139
140private:
141
142 /** Prepares everything. */
143 void prepare();
144 /** Cleanups everything. */
145 void cleanup();
146
147 /** Holds the frame-buffer private instance. */
148 ComObjPtr<UIFrameBufferPrivate> m_pFrameBuffer;
149
150 /** Holds whether frame-buffer was initialized already. */
151 bool m_fInitialized;
152};
153
154#endif /* !FEQT_INCLUDED_SRC_runtime_UIFrameBuffer_h */
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