| 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) 2006-2007 Oracle Corporation
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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 (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | */
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| 17 |
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| 18 | #ifndef __DISPLAY_VRDPBMP__H
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| 19 | #define __DISPLAY_VRDPBMP__H
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| 20 |
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| 21 | /* RDP cache holds about 350 tiles 64x64. Therefore
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| 22 | * the driver does not have to cache more then the
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| 23 | * RDP capacity. Most of bitmaps will be tiled, so
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| 24 | * number of RDP tiles will be greater than number of
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| 25 | * bitmaps. Also the number of bitmaps must be a power
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| 26 | * of 2. So the 256 is a good number.
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| 27 | */
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| 28 | #define VRDPBMP_N_CACHED_BITMAPS (256)
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| 29 |
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| 30 | #define VRDPBMP_RC_NOT_CACHED (0x0000)
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| 31 | #define VRDPBMP_RC_CACHED (0x0001)
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| 32 | #define VRDPBMP_RC_ALREADY_CACHED (0x0002)
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| 33 |
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| 34 | #define VRDPBMP_RC_F_DELETED (0x10000)
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| 35 |
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| 36 | /* Bitmap hash. */
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| 37 | #pragma pack (1)
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| 38 | typedef struct _VRDPBCHASH
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| 39 | {
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| 40 | /* A 64 bit hash value of pixels. */
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| 41 | uint64_t hash64;
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| 42 |
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| 43 | /* Bitmap width. */
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| 44 | uint16_t cx;
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| 45 |
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| 46 | /* Bitmap height. */
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| 47 | uint16_t cy;
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| 48 |
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| 49 | /* Bytes per pixel at the bitmap. */
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| 50 | uint8_t bytesPerPixel;
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| 51 |
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| 52 | /* Padding to 16 bytes. */
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| 53 | uint8_t padding[3];
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| 54 | } VRDPBCHASH;
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| 55 | #pragma pack ()
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| 56 |
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| 57 | typedef struct _VRDPBCENTRY
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| 58 | {
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| 59 | bool fUsed;
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| 60 | struct _VRDPBCENTRY *next;
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| 61 | struct _VRDPBCENTRY *prev;
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| 62 | VRDPBCHASH hash;
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| 63 | } VRDPBCENTRY;
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| 64 |
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| 65 | typedef struct _VRDPBC
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| 66 | {
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| 67 | VRDPBCENTRY *head;
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| 68 | VRDPBCENTRY *tail;
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| 69 | VRDPBCENTRY aEntries[VRDPBMP_N_CACHED_BITMAPS];
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| 70 | } VRDPBC;
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| 71 |
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| 72 | void vrdpbmpReset (VRDPBC *pCache);
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| 73 |
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| 74 | int vrdpbmpCacheSurface (VRDPBC *pCache, const SURFOBJ *pso, VRDPBCHASH *phash, VRDPBCHASH *phashDeleted);
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| 75 |
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| 76 | #endif /* __DISPLAY_VRDPBMP__H */
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