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