135 lines
5.0 KiB
C
135 lines
5.0 KiB
C
/****************************************************************************/
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// nshmapi.h
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//
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// RDP Display Driver/Share Core shared memory
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//
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// Copyright (C) 1996-2000 Microsoft Corporation
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/****************************************************************************/
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#ifndef _H_NSHMAPI
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#define _H_NSHMAPI
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#include <adcs.h>
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#include <aordprot.h>
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#include <aoaapi.h>
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#include <abaapi.h>
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#include <asbcapi.h>
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#include <acmapi.h>
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#include <apmapi.h>
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#include <aschapi.h>
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#include <aoeapi.h>
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#include <assiapi.h>
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#include <abcapi.h>
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#include <compress.h>
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#define SHM_CHECKVAL (UINT32)'!mhs' // "shm!"
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// Max size allowed for data to be input to the bulk MPPC compressor.
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#ifdef DC_HICOLOR
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#define MAX_COMPRESS_INPUT_BUF 16384
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#else
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#define MAX_COMPRESS_INPUT_BUF 8192
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#endif
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// Allocation size for a temp buffer used to hold data to be compressed with
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// MPPC. This data must fit into an 8K OUTBUF, so we might as well not alloc
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// the OUTBUF overhead size we'll never use anyway. See aschapi.h for
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// constants used for allocations.
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#define MAX_COMPRESSED_BUFFER (MAX_COMPRESS_INPUT_BUF - OUTBUF_OVERHEAD)
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/****************************************************************************/
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/* Format of the shadow data shared between stacks */
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/****************************************************************************/
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typedef struct tagSHADOW_INFO {
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ULONG messageSize;
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#ifdef DC_HICOLOR
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// Note we can't just send a chunk bigger than 16k - we have to introduce
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// an overflow buffer for high color
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ULONG messageSizeEx;
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#endif
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ULONG flags;
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ULONG senderID;
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ULONG channelID;
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BYTE data[1];
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} SHADOW_INFO, *PSHADOW_INFO;
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/****************************************************************************/
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/* Structure: SHM_SHARED_MEMORY */
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/* */
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/* Description: */
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/* Shared memory as used by the display driver and share core to */
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/* communicate. It is divided up into sub-structures for each component */
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/* that uses the shared mem, each sub-struct being named after the owning */
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/* component. */
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/****************************************************************************/
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typedef struct tagSHM_SHARED_MEMORY
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{
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/************************************************************************/
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/* We deliberately compile the guard values into the retail build */
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/* as well as the debug build so that we can mix-n-match retail and */
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/* debug wd/dd drivers (the shared memory format must be the same for */
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/* both). */
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/************************************************************************/
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UINT32 guardVal1;
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INT32 shareId;
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BOOLEAN fShmUpdate;
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PSHADOW_INFO pShadowInfo; /* used by the primary and shadow */
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/* stack(s) for communication. */
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/************************************************************************/
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// NOTE!!: Each component must make sure to init its Shm component.
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// We do NOT zero the shm on alloc to reduce init-time paging and cache
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// flushing.
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/************************************************************************/
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BA_SHARED_DATA ba; /* Accumulated bounds. */
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OA_SHARED_DATA oa; /* Order heap. */
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OE_SHARED_DATA oe; /* Transfer buffer for new parameters */
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CM_SHARED_DATA cm; /* Location for DD to put cursor details */
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SCH_SHARED_DATA sch; /* SCH shared data */
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PM_SHARED_DATA pm; /* PM shared data */
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SSI_SHARED_DATA ssi; /* SSI shared data */
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SBC_SHARED_DATA sbc; /* SBC shared data */
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BC_SHARED_DATA bc; // BC work buffers.
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UINT32 guardVal2;
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// Uninitialized work buffer for screen data compression.
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// Better in this case to use session space memory instead of putting
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// this in the ShareClass allocation in system space -- session space
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// PTEs are essentially unlimited.
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BYTE sdgTransferBuffer[MAX_UNCOMPRESSED_DATA_SIZE];
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UINT32 guardVal3;
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#ifdef DC_DEBUG
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TRC_SHARED_DATA trc; /* TRC shared data */
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#endif
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UINT32 guardVal4;
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UINT32 guardVal5;
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} SHM_SHARED_MEMORY, *PSHM_SHARED_MEMORY, **PPSHM_SHARED_MEMORY;
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/****************************************************************************/
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// Prototypes.
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/****************************************************************************/
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#ifdef DLL_DISP
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#include <nddapi.h>
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BOOLEAN RDPCALL SHM_Init(PDD_PDEV pPDev);
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void RDPCALL SHM_Term(void);
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#endif
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#endif // !defined(_H_NSHMAPI)
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