| 1 | /* $Id: Framebuffer.h 106061 2024-09-16 14:03:52Z vboxsync $ */
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| 2 | /** @file
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| 3 | *
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| 4 | * VBox frontends: VBoxSDL (simple frontend based on SDL):
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| 5 | * Declaration of VBoxSDLFB (SDL framebuffer) class
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| 6 | */
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| 7 |
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| 8 | /*
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| 9 | * Copyright (C) 2006-2024 Oracle and/or its affiliates.
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| 10 | *
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| 11 | * This file is part of VirtualBox base platform packages, as
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| 12 | * available from https://www.virtualbox.org.
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| 13 | *
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| 14 | * This program is free software; you can redistribute it and/or
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| 15 | * modify it under the terms of the GNU General Public License
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| 16 | * as published by the Free Software Foundation, in version 3 of the
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| 17 | * License.
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| 18 | *
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| 19 | * This program is distributed in the hope that it will be useful, but
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| 20 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 22 | * General Public License for more details.
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| 23 | *
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| 24 | * You should have received a copy of the GNU General Public License
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| 25 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 26 | *
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| 27 | * SPDX-License-Identifier: GPL-3.0-only
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| 28 | */
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| 29 |
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| 30 | #ifndef VBOX_INCLUDED_SRC_VBoxSDL_Framebuffer_h
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| 31 | #define VBOX_INCLUDED_SRC_VBoxSDL_Framebuffer_h
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| 32 | #ifndef RT_WITHOUT_PRAGMA_ONCE
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| 33 | # pragma once
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| 34 | #endif
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| 35 |
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| 36 | #include "VBoxSDL.h"
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| 37 | #include <iprt/thread.h>
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| 38 |
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| 39 | #include <iprt/critsect.h>
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| 40 |
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| 41 | class VBoxSDLFBOverlay;
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| 42 |
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| 43 | class ATL_NO_VTABLE VBoxSDLFB :
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| 44 | public ATL::CComObjectRootEx<ATL::CComMultiThreadModel>,
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| 45 | VBOX_SCRIPTABLE_IMPL(IFramebuffer)
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| 46 | {
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| 47 | public:
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| 48 | VBoxSDLFB();
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| 49 | virtual ~VBoxSDLFB();
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| 50 |
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| 51 | HRESULT init(uint32_t uScreenId,
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| 52 | bool fFullscreen, bool fResizable, bool fShowSDLConfig,
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| 53 | bool fKeepHostRes, uint32_t u32FixedWidth,
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| 54 | uint32_t u32FixedHeight, uint32_t u32FixedBPP,
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| 55 | bool fUpdateImage);
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| 56 |
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| 57 | static bool init(bool fShowSDLConfig);
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| 58 | static void uninit();
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| 59 |
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| 60 | DECLARE_NOT_AGGREGATABLE(VBoxSDLFB)
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| 61 |
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| 62 | DECLARE_PROTECT_FINAL_CONSTRUCT()
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| 63 |
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| 64 | BEGIN_COM_MAP(VBoxSDLFB)
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| 65 | COM_INTERFACE_ENTRY(IFramebuffer)
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| 66 | COM_INTERFACE_ENTRY2(IDispatch,IFramebuffer)
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| 67 | COM_INTERFACE_ENTRY_AGGREGATE(IID_IMarshal, m_pUnkMarshaler.m_p)
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| 68 | END_COM_MAP()
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| 69 |
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| 70 | HRESULT FinalConstruct();
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| 71 | void FinalRelease();
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| 72 |
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| 73 | STDMETHOD(COMGETTER(Width))(ULONG *width);
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| 74 | STDMETHOD(COMGETTER(Height))(ULONG *height);
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| 75 | STDMETHOD(COMGETTER(BitsPerPixel))(ULONG *bitsPerPixel);
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| 76 | STDMETHOD(COMGETTER(BytesPerLine))(ULONG *bytesPerLine);
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| 77 | STDMETHOD(COMGETTER(PixelFormat))(BitmapFormat_T *pixelFormat);
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| 78 | STDMETHOD(COMGETTER(HeightReduction))(ULONG *heightReduction);
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| 79 | STDMETHOD(COMGETTER(Overlay))(IFramebufferOverlay **aOverlay);
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| 80 | STDMETHOD(COMGETTER(WinId))(LONG64 *winId);
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| 81 | STDMETHOD(COMGETTER(Capabilities))(ComSafeArrayOut(FramebufferCapabilities_T, aCapabilities));
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| 82 |
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| 83 | STDMETHOD(NotifyUpdate)(ULONG x, ULONG y, ULONG w, ULONG h);
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| 84 | STDMETHOD(NotifyUpdateImage)(ULONG x, ULONG y, ULONG w, ULONG h, ComSafeArrayIn(BYTE, aImage));
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| 85 | STDMETHOD(NotifyChange)(ULONG aScreenId,
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| 86 | ULONG aXOrigin,
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| 87 | ULONG aYOrigin,
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| 88 | ULONG aWidth,
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| 89 | ULONG aHeight);
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| 90 | STDMETHOD(VideoModeSupported)(ULONG width, ULONG height, ULONG bpp, BOOL *supported);
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| 91 |
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| 92 | STDMETHOD(GetVisibleRegion)(BYTE *aRectangles, ULONG aCount, ULONG *aCountCopied);
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| 93 | STDMETHOD(SetVisibleRegion)(BYTE *aRectangles, ULONG aCount);
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| 94 |
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| 95 | STDMETHOD(ProcessVHWACommand)(BYTE *pCommand, LONG enmCmd, BOOL fGuestCmd);
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| 96 |
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| 97 | STDMETHOD(Notify3DEvent)(ULONG uType, ComSafeArrayIn(BYTE, aData));
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| 98 |
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| 99 | // internal public methods
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| 100 | bool initialized() { return mfInitialized; }
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| 101 | void notifyChange(ULONG aScreenId);
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| 102 | void resizeGuest();
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| 103 | void resizeSDL();
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| 104 | void update(int x, int y, int w, int h, bool fGuestRelative);
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| 105 | void repaint();
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| 106 | void setFullscreen(bool fFullscreen);
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| 107 | void getFullscreenGeometry(uint32_t *width, uint32_t *height);
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| 108 | uint32_t getScreenId() { return mScreenId; }
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| 109 | uint32_t getGuestXRes() { return mGuestXRes; }
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| 110 | uint32_t getGuestYRes() { return mGuestYRes; }
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| 111 | int32_t getOriginX() { return mOriginX; }
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| 112 | int32_t getOriginY() { return mOriginY; }
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| 113 | int32_t getXOffset() { return mCenterXOffset; }
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| 114 | int32_t getYOffset() { return mCenterYOffset; }
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| 115 | SDL_Window *getWindow() { return mpWindow; }
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| 116 | bool hasWindow(uint32_t id) { return SDL_GetWindowID(mpWindow) == id; }
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| 117 | int setWindowTitle(const char *pcszTitle);
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| 118 | void setWinId(int64_t winId) { mWinId = winId; }
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| 119 | void setOrigin(int32_t axOrigin, int32_t ayOrigin) { mOriginX = axOrigin; mOriginY = ayOrigin; }
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| 120 | bool getFullscreen() { return mfFullscreen; }
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| 121 |
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| 122 | private:
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| 123 |
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| 124 | /** the SDL window */
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| 125 | SDL_Window *mpWindow;
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| 126 | /** the texture */
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| 127 | SDL_Texture *mpTexture;
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| 128 | /** renderer */
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| 129 | SDL_Renderer *mpRenderer;
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| 130 | /** render info */
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| 131 | SDL_RendererInfo mRenderInfo;
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| 132 | /** false if constructor failed */
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| 133 | bool mfInitialized;
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| 134 | /** the screen number of this framebuffer */
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| 135 | uint32_t mScreenId;
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| 136 | /** use NotifyUpdateImage */
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| 137 | bool mfUpdateImage;
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| 138 | /** maximum possible screen width in pixels (~0 = no restriction) */
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| 139 | uint32_t mMaxScreenWidth;
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| 140 | /** maximum possible screen height in pixels (~0 = no restriction) */
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| 141 | uint32_t mMaxScreenHeight;
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| 142 | /** current guest screen width in pixels */
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| 143 | ULONG mGuestXRes;
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| 144 | /** current guest screen height in pixels */
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| 145 | ULONG mGuestYRes;
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| 146 | int32_t mOriginX;
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| 147 | int32_t mOriginY;
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| 148 | /** fixed SDL screen width (~0 = not set) */
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| 149 | uint32_t mFixedSDLWidth;
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| 150 | /** fixed SDL screen height (~0 = not set) */
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| 151 | uint32_t mFixedSDLHeight;
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| 152 | /** fixed SDL bits per pixel (~0 = not set) */
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| 153 | uint32_t mFixedSDLBPP;
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| 154 | /** Y offset in pixels, i.e. guest-nondrawable area at the top */
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| 155 | uint32_t mTopOffset;
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| 156 | /** X offset for guest screen centering */
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| 157 | uint32_t mCenterXOffset;
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| 158 | /** Y offset for guest screen centering */
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| 159 | uint32_t mCenterYOffset;
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| 160 | /** flag whether we're in fullscreen mode */
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| 161 | bool mfFullscreen;
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| 162 | /** flag whether we keep the host screen resolution when switching to
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| 163 | * fullscreen or not */
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| 164 | bool mfKeepHostRes;
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| 165 | /** framebuffer update semaphore */
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| 166 | RTCRITSECT mUpdateLock;
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| 167 | /** flag whether the SDL window should be resizable */
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| 168 | bool mfResizable;
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| 169 | /** flag whether we print out SDL information */
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| 170 | bool mfShowSDLConfig;
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| 171 | /** handle to window where framebuffer context is being drawn*/
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| 172 | int64_t mWinId;
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| 173 | SDL_Surface *mSurfVRAM;
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| 174 |
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| 175 | BYTE *mPtrVRAM;
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| 176 | ULONG mBitsPerPixel;
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| 177 | ULONG mBytesPerLine;
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| 178 | BOOL mfSameSizeRequested;
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| 179 |
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| 180 | ComPtr<IDisplaySourceBitmap> mpSourceBitmap;
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| 181 | ComPtr<IDisplaySourceBitmap> mpPendingSourceBitmap;
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| 182 | bool mfUpdates;
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| 183 |
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| 184 | #ifdef RT_OS_WINDOWS
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| 185 | ComPtr<IUnknown> m_pUnkMarshaler;
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| 186 | #endif
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| 187 | };
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| 188 |
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| 189 | class VBoxSDLFBOverlay :
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| 190 | public IFramebufferOverlay
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| 191 | {
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| 192 | public:
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| 193 | VBoxSDLFBOverlay(ULONG x, ULONG y, ULONG width, ULONG height, BOOL visible,
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| 194 | VBoxSDLFB *aParent);
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| 195 | virtual ~VBoxSDLFBOverlay();
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| 196 |
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| 197 | #ifdef RT_OS_WINDOWS
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| 198 | STDMETHOD_(ULONG, AddRef)()
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| 199 | {
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| 200 | return ::InterlockedIncrement(&refcnt);
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| 201 | }
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| 202 | STDMETHOD_(ULONG, Release)()
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| 203 | {
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| 204 | long cnt = ::InterlockedDecrement(&refcnt);
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| 205 | if (cnt == 0)
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| 206 | delete this;
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| 207 | return cnt;
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| 208 | }
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| 209 | #endif
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| 210 | VBOX_SCRIPTABLE_DISPATCH_IMPL(IFramebuffer)
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| 211 |
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| 212 | NS_DECL_ISUPPORTS
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| 213 |
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| 214 | STDMETHOD(COMGETTER(X))(ULONG *x);
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| 215 | STDMETHOD(COMGETTER(Y))(ULONG *y);
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| 216 | STDMETHOD(COMGETTER(Width))(ULONG *width);
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| 217 | STDMETHOD(COMGETTER(Height))(ULONG *height);
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| 218 | STDMETHOD(COMGETTER(Visible))(BOOL *visible);
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| 219 | STDMETHOD(COMSETTER(Visible))(BOOL visible);
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| 220 | STDMETHOD(COMGETTER(Alpha))(ULONG *alpha);
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| 221 | STDMETHOD(COMSETTER(Alpha))(ULONG alpha);
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| 222 | STDMETHOD(COMGETTER(BytesPerLine))(ULONG *bytesPerLine);
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| 223 |
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| 224 | /* These are not used, or return standard values. */
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| 225 | STDMETHOD(COMGETTER(BitsPerPixel))(ULONG *bitsPerPixel);
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| 226 | STDMETHOD(COMGETTER(PixelFormat))(ULONG *pixelFormat);
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| 227 | STDMETHOD(COMGETTER(UsesGuestVRAM))(BOOL *usesGuestVRAM);
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| 228 | STDMETHOD(COMGETTER(HeightReduction))(ULONG *heightReduction);
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| 229 | STDMETHOD(COMGETTER(Overlay))(IFramebufferOverlay **aOverlay);
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| 230 | STDMETHOD(COMGETTER(WinId))(LONG64 *winId);
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| 231 |
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| 232 | STDMETHOD(Lock)();
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| 233 | STDMETHOD(Unlock)();
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| 234 | STDMETHOD(Move)(ULONG x, ULONG y);
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| 235 | STDMETHOD(NotifyUpdate)(ULONG x, ULONG y, ULONG w, ULONG h);
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| 236 | STDMETHOD(RequestResize)(ULONG aScreenId, ULONG pixelFormat, ULONG vram,
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| 237 | ULONG bitsPerPixel, ULONG bytesPerLine,
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| 238 | ULONG w, ULONG h, BOOL *finished);
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| 239 | STDMETHOD(VideoModeSupported)(ULONG width, ULONG height, ULONG bpp, BOOL *supported);
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| 240 |
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| 241 | // internal public methods
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| 242 | HRESULT init();
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| 243 |
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| 244 | private:
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| 245 | /** Overlay X offset */
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| 246 | ULONG mOverlayX;
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| 247 | /** Overlay Y offset */
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| 248 | ULONG mOverlayY;
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| 249 | /** Overlay width */
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| 250 | ULONG mOverlayWidth;
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| 251 | /** Overlay height */
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| 252 | ULONG mOverlayHeight;
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| 253 | /** Whether the overlay is currently active */
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| 254 | BOOL mOverlayVisible;
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| 255 | /** The parent IFramebuffer */
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| 256 | VBoxSDLFB *mParent;
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| 257 | /** SDL surface containing the actual framebuffer bits */
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| 258 | SDL_Surface *mOverlayBits;
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| 259 | /** Additional SDL surface used for combining the framebuffer and the overlay */
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| 260 | SDL_Surface *mBlendedBits;
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| 261 | #ifdef RT_OS_WINDOWS
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| 262 | long refcnt;
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| 263 | #endif
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| 264 | };
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| 265 |
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| 266 | #endif /* !VBOX_INCLUDED_SRC_VBoxSDL_Framebuffer_h */
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