| 1 | /** @file
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| 2 | *
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| 3 | * VBoxGuest -- VirtualBox Win 2000/XP guest display driver
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| 4 | *
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| 5 | * VRDP bitmap cache.
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| 6 | *
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| 7 | * Copyright (C) 2006 InnoTek Systemberatung GmbH
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License as published by the Free Software Foundation,
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| 13 | * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
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| 14 | * distribution. VirtualBox OSE is distributed in the hope that it will
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| 15 | * be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * If you received this file as part of a commercial VirtualBox
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| 18 | * distribution, then only the terms of your commercial VirtualBox
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| 19 | * license agreement apply instead of the previous paragraph.
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| 20 | *
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| 21 | */
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| 22 |
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| 23 | #ifndef __DISPLAY_VRDPBMP__H
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| 24 | #define __DISPLAY_VRDPBMP__H
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| 25 |
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| 26 | /* RDP cache holds about 350 tiles 64x64. Therefore
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| 27 | * the driver does not have to cache more then the
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| 28 | * RDP capacity. Most of bitmaps will be tiled, so
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| 29 | * number of RDP tiles will be greater than number of
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| 30 | * bitmaps. Also the number of bitmaps must be a power
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| 31 | * of 2. So the 256 is a good number.
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| 32 | */
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| 33 | #define VRDPBMP_N_CACHED_BITMAPS (256)
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| 34 |
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| 35 | #define VRDPBMP_RC_NOT_CACHED (0x0000)
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| 36 | #define VRDPBMP_RC_CACHED (0x0001)
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| 37 | #define VRDPBMP_RC_ALREADY_CACHED (0x0002)
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| 38 |
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| 39 | #define VRDPBMP_RC_F_DELETED (0x10000)
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| 40 |
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| 41 | /* Bitmap hash. */
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| 42 | #pragma pack (1)
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| 43 | typedef struct _VRDPBCHASH
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| 44 | {
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| 45 | /* A 64 bit hash value of pixels. */
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| 46 | uint64_t hash64;
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| 47 |
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| 48 | /* Bitmap width. */
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| 49 | uint16_t cx;
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| 50 |
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| 51 | /* Bitmap height. */
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| 52 | uint16_t cy;
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| 53 |
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| 54 | /* Bytes per pixel at the bitmap. */
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| 55 | uint8_t bytesPerPixel;
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| 56 |
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| 57 | /* Padding to 16 bytes. */
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| 58 | uint8_t padding[3];
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| 59 | } VRDPBCHASH;
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| 60 | #pragma pack ()
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| 61 |
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| 62 | typedef struct _VRDPBCENTRY
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| 63 | {
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| 64 | bool fUsed;
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| 65 | struct _VRDPBCENTRY *next;
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| 66 | struct _VRDPBCENTRY *prev;
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| 67 | VRDPBCHASH hash;
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| 68 | } VRDPBCENTRY;
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| 69 |
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| 70 | typedef struct _VRDPBC
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| 71 | {
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| 72 | VRDPBCENTRY *head;
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| 73 | VRDPBCENTRY *tail;
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| 74 | VRDPBCENTRY aEntries[VRDPBMP_N_CACHED_BITMAPS];
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| 75 | } VRDPBC;
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| 76 |
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| 77 | void vrdpbmpReset (VRDPBC *pCache);
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| 78 |
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| 79 | int vrdpbmpCacheSurface (VRDPBC *pCache, const SURFOBJ *pso, VRDPBCHASH *phash, VRDPBCHASH *phashDeleted);
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| 80 |
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| 81 | #endif /* __DISPLAY_VRDPBMP__H */
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