| 1 | /** @file
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| 2 | *
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| 3 | * VBox frontends: Framebuffer (FB, DirectFB):
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| 4 | * Implementation of VBoxDirectFB class
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| 5 | */
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| 6 |
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| 7 | /*
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| 8 | * Copyright (C) 2006-2007 innotek GmbH
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| 9 | *
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| 10 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 11 | * available from http://www.virtualbox.org. This file is free software;
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| 12 | * you can redistribute it and/or modify it under the terms of the GNU
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| 13 | * General Public License (GPL) as published by the Free Software
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| 14 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 15 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 16 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 17 | */
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| 18 |
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| 19 | #include "VBoxFB.h"
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| 20 | #include "Framebuffer.h"
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| 21 |
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| 22 | NS_IMPL_ISUPPORTS1_CI(VBoxDirectFB, IFramebuffer)
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| 23 | NS_DECL_CLASSINFO(VBoxDirectFB)
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| 24 |
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| 25 | VBoxDirectFB::VBoxDirectFB(IDirectFB *aDFB, IDirectFBSurface *aSurface)
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| 26 | {
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| 27 | dfb = aDFB;
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| 28 | surface = aSurface;
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| 29 | fbInternalSurface = NULL;
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| 30 | fbBufferAddress = NULL;
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| 31 | // initialize screen dimensions
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| 32 | DFBCHECK(surface->GetSize(surface, (int*)&screenWidth, (int*)&screenHeight));
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| 33 | fbWidth = 640;
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| 34 | fbHeight = 480;
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| 35 | if ((screenWidth != fbWidth) || (screenHeight != fbHeight))
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| 36 | {
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| 37 | createSurface(fbWidth, fbHeight);
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| 38 | }
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| 39 | fbSurfaceLocked = 0;
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| 40 | uint32_t bitsPerPixel;
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| 41 | GetBitsPerPixel(&bitsPerPixel);
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| 42 | fbPitch = fbWidth * (bitsPerPixel / 8);
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| 43 | }
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| 44 |
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| 45 | VBoxDirectFB::~VBoxDirectFB()
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| 46 | {
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| 47 | // free our internal surface
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| 48 | if (fbInternalSurface)
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| 49 | {
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| 50 | DFBCHECK(fbInternalSurface->Release(fbInternalSurface));
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| 51 | fbInternalSurface = NULL;
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| 52 | }
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| 53 | }
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| 54 |
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| 55 | NS_IMETHODIMP VBoxDirectFB::GetWidth(uint32 *width)
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| 56 | {
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| 57 | if (!width)
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| 58 | return NS_ERROR_INVALID_POINTER;
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| 59 | *width = fbWidth;
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| 60 | return NS_OK;
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| 61 | }
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| 62 |
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| 63 | NS_IMETHODIMP VBoxDirectFB::GetHeight(uint32_t *height)
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| 64 | {
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| 65 | if (!height)
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| 66 | return NS_ERROR_INVALID_POINTER;
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| 67 | *height = fbHeight;
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| 68 | return NS_OK;
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| 69 | }
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| 70 |
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| 71 | NS_IMETHODIMP VBoxDirectFB::Lock()
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| 72 | {
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| 73 | // do we have an internal framebuffer?
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| 74 | if (fbInternalSurface)
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| 75 | {
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| 76 | if (fbSurfaceLocked)
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| 77 | {
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| 78 | printf("internal surface already locked!\n");
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| 79 | } else
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| 80 | {
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| 81 | DFBCHECK(fbInternalSurface->Lock(fbInternalSurface,
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| 82 | (DFBSurfaceLockFlags)(DSLF_WRITE | DSLF_READ),
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| 83 | &fbBufferAddress, (int*)&fbPitch));
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| 84 | fbSurfaceLocked = 1;
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| 85 | }
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| 86 | } else
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| 87 | {
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| 88 | if (fbSurfaceLocked)
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| 89 | {
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| 90 | printf("surface already locked!\n");
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| 91 | } else
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| 92 | {
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| 93 | DFBCHECK(surface->Lock(surface, (DFBSurfaceLockFlags)(DSLF_WRITE | DSLF_READ),
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| 94 | &fbBufferAddress, (int*)&fbPitch));
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| 95 | fbSurfaceLocked = 1;
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| 96 | }
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| 97 | }
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| 98 | return NS_OK;
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| 99 | }
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| 100 |
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| 101 | NS_IMETHODIMP VBoxDirectFB::Unlock()
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| 102 | {
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| 103 | // do we have an internal framebuffer?
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| 104 | if (fbInternalSurface)
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| 105 | {
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| 106 | if (!fbSurfaceLocked)
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| 107 | {
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| 108 | printf("internal surface not locked!\n");
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| 109 | } else
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| 110 | {
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| 111 | DFBCHECK(fbInternalSurface->Unlock(fbInternalSurface));
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| 112 | fbSurfaceLocked = 0;
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| 113 | }
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| 114 | } else
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| 115 | {
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| 116 | if (!fbSurfaceLocked)
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| 117 | {
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| 118 | printf("surface not locked!\n");
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| 119 | } else
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| 120 | {
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| 121 | DFBCHECK(surface->Unlock(surface));
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| 122 | fbSurfaceLocked = 0;
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| 123 | }
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| 124 | }
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| 125 | return NS_OK;
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| 126 | }
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| 127 |
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| 128 | NS_IMETHODIMP VBoxDirectFB::GetAddress(uint32_t *address)
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| 129 | {
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| 130 | if (!address)
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| 131 | return NS_ERROR_INVALID_POINTER;
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| 132 | *address = (uint32_t)fbBufferAddress;
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| 133 | return NS_OK;
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| 134 | }
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| 135 |
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| 136 | NS_IMETHODIMP VBoxDirectFB::GetBitsPerPixel(uint32_t *bitsPerPixel)
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| 137 | {
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| 138 | if (!bitsPerPixel)
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| 139 | return NS_ERROR_INVALID_POINTER;
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| 140 | DFBSurfacePixelFormat pixelFormat;
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| 141 | DFBCHECK(surface->GetPixelFormat(surface, &pixelFormat));
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| 142 | switch (pixelFormat)
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| 143 | {
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| 144 | case DSPF_RGB16:
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| 145 | *bitsPerPixel = 16;
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| 146 | break;
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| 147 | case DSPF_RGB24:
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| 148 | *bitsPerPixel = 24;
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| 149 | break;
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| 150 | case DSPF_RGB32:
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| 151 | *bitsPerPixel = 32;
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| 152 | break;
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| 153 | default:
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| 154 | // not good! @@@AH do something!
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| 155 | *bitsPerPixel = 16;
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| 156 | }
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| 157 | return NS_OK;
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| 158 | }
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| 159 |
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| 160 | NS_IMETHODIMP VBoxDirectFB::GetBytesPerLine(uint32_t *bytesPerLine)
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| 161 | {
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| 162 | if (!bytesPerLine)
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| 163 | return NS_ERROR_INVALID_POINTER;
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| 164 | *bytesPerLine = fbPitch;
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| 165 | return NS_OK;
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| 166 | }
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| 167 |
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| 168 | NS_IMETHODIMP VBoxDirectFB::COMGETTER(PixelFormat) (ULONG *pixelFormat)
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| 169 | {
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| 170 | if (!pixelFormat)
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| 171 | return NS_ERROR_INVALID_POINTER;
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| 172 | *pixelFormat = FramebufferPixelFormat_FOURCC_RGB;
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| 173 | return NS_OK;
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| 174 | }
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| 175 |
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| 176 | NS_IMETHODIMP VBoxDirectFB::COMGETTER(UsesGuestVRAM) (BOOL *usesGuestVRAM)
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| 177 | {
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| 178 | if (!usesGuestVRAM)
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| 179 | return NS_ERROR_INVALID_POINTER;
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| 180 | *usesGuestVRAM = FALSE;
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| 181 | return NS_OK;
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| 182 | }
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| 183 |
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| 184 | NS_IMETHODIMP VBoxDirectFB::NotifyUpdate(uint32_t x, uint32_t y,
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| 185 | uint32_t w, uint32_t h, PRBool *finished)
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| 186 | {
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| 187 | // we only need to take action if we have a memory framebuffer
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| 188 | if (fbInternalSurface)
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| 189 | {
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| 190 | //printf("blitting %u %u %u %u...\n", x, y, w, h);
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| 191 | DFBRectangle blitRectangle;
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| 192 | blitRectangle.x = x;
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| 193 | blitRectangle.y = y;
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| 194 | blitRectangle.w = w;
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| 195 | blitRectangle.h = h;
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| 196 | if (scaleGuest)
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| 197 | {
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| 198 | DFBRectangle hostRectangle;
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| 199 | float factorX = (float)screenWidth / (float)fbWidth;
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| 200 | float factorY = (float)screenHeight / (float)fbHeight;
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| 201 | hostRectangle.x = (int)((float)blitRectangle.x * factorX);
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| 202 | hostRectangle.y = (int)((float)blitRectangle.y * factorY);
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| 203 | hostRectangle.w = (int)((float)blitRectangle.w * factorX);
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| 204 | hostRectangle.h = (int)((float)blitRectangle.h * factorY);
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| 205 | DFBCHECK(surface->StretchBlit(surface, fbInternalSurface,
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| 206 | &blitRectangle, &hostRectangle));
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| 207 | } else
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| 208 | {
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| 209 | DFBCHECK(surface->Blit(surface, fbInternalSurface, &blitRectangle,
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| 210 | x + ((screenWidth - fbWidth) / 2),
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| 211 | y + (screenHeight - fbHeight) / 2));
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| 212 | }
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| 213 | }
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| 214 | if (finished)
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| 215 | *finished = true;
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| 216 | return NS_OK;
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| 217 | }
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| 218 |
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| 219 | NS_IMETHODIMP VBoxDirectFB::RequestResize(ULONG aScreenId, ULONG pixelFormat, uint32_t vram,
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| 220 | uint32_t bitsPerPixel, uint32_t bytesPerLine,
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| 221 | uint32_t w, uint32_t h,
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| 222 | PRBool *finished)
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| 223 | {
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| 224 | uint32_t needsLocking = fbSurfaceLocked;
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| 225 | uint32_t bitsPerPixel;
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| 226 |
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| 227 | GetBitsPerPixel(&bitsPerPixel);
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| 228 | printf("RequestResize: w = %d, h = %d, fbSurfaceLocked = %d\n", w, h, fbSurfaceLocked);
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| 229 |
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| 230 | // we can't work with a locked surface
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| 231 | if (needsLocking)
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| 232 | {
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| 233 | Unlock();
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| 234 | }
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| 235 |
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| 236 | // in any case we gotta free a possible internal framebuffer
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| 237 | if (fbInternalSurface)
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| 238 | {
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| 239 | printf("freeing internal surface\n");
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| 240 | fbInternalSurface->Release(fbInternalSurface);
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| 241 | fbInternalSurface = NULL;
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| 242 | }
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| 243 |
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| 244 | // check if we have a fixed host video mode
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| 245 | if (useFixedVideoMode)
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| 246 | {
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| 247 | // does the current video mode differ from what the guest wants?
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| 248 | if ((screenWidth == w) && (screenHeight == h))
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| 249 | {
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| 250 | printf("requested guest mode matches current host mode!\n");
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| 251 | } else
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| 252 | {
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| 253 | createSurface(w, h);
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| 254 | }
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| 255 | } else
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| 256 | {
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| 257 | // we adopt to the guest resolution or the next higher that is available
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| 258 | int32_t bestMode = getBestVideoMode(w, h, bitsPerPixel);
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| 259 | if (bestMode == -1)
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| 260 | {
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| 261 | // oh oh oh oh
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| 262 | printf("RequestResize: no suitable mode found!\n");
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| 263 | return NS_OK;
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| 264 | }
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| 265 |
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| 266 | // does the mode differ from what we wanted?
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| 267 | if ((videoModes[bestMode].width != w) || (videoModes[bestMode].height != h) ||
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| 268 | (videoModes[bestMode].bpp != bitsPerPixel))
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| 269 | {
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| 270 | printf("The mode does not fit exactly!\n");
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| 271 | createSurface(w, h);
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| 272 | } else
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| 273 | {
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| 274 | printf("The mode fits exactly!\n");
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| 275 | }
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| 276 | // switch to this mode
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| 277 | DFBCHECK(dfb->SetVideoMode(dfb, videoModes[bestMode].width, videoModes[bestMode].height,
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| 278 | videoModes[bestMode].bpp));
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| 279 | }
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| 280 |
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| 281 | // update dimensions to the new size
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| 282 | fbWidth = w;
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| 283 | fbHeight = h;
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| 284 |
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| 285 | // clear the screen
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| 286 | DFBCHECK(surface->Clear(surface, 0, 0, 0, 0));
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| 287 |
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| 288 | // if it was locked before the resize, obtain the lock again
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| 289 | if (needsLocking)
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| 290 | {
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| 291 | Lock();
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| 292 | }
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| 293 |
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| 294 | if (finished)
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| 295 | *finished = true;
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| 296 | return NS_OK;
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| 297 | }
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| 298 |
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| 299 | int VBoxDirectFB::createSurface(uint32_t w, uint32_t h)
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| 300 | {
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| 301 | printf("creating a new internal surface, w = %u, h = %u...\n", w, h);
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| 302 | // create a surface
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| 303 | DFBSurfaceDescription dsc;
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| 304 | DFBSurfacePixelFormat pixelFormat;
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| 305 | dsc.flags = (DFBSurfaceDescriptionFlags)(DSDESC_WIDTH | DSDESC_HEIGHT | DSDESC_PIXELFORMAT);
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| 306 | dsc.width = w;
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| 307 | dsc.height = h;
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| 308 | DFBCHECK(surface->GetPixelFormat(surface, &pixelFormat));
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| 309 | dsc.pixelformat = pixelFormat;
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| 310 | DFBCHECK(dfb->CreateSurface(dfb, &dsc, &fbInternalSurface));
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| 311 | return 0;
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| 312 | }
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