121 lines
2.4 KiB
C++
121 lines
2.4 KiB
C++
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#include "precomp.h"
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//
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// OSI.CPP
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// OS Isolation layer, NT version in HOOK
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//
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// Copyright(c) Microsoft 1997-
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//
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#include <osi.h>
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#include <version.h>
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#include <ndcgver.h>
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//
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// OSI_SetDriverName()
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// This saves or clears the driver name so in OSI_FunctionRequest we can
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// create a DC to communicate with our display driver. On NT4.x this is a
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// display DC; on NT5 this is a direct DC to our driver.
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//
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void OSI_SetDriverName(LPCSTR szDriverName)
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{
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DebugEntry(OSI_SetDriverName);
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if (!szDriverName)
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{
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// Clear it
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g_osiDriverName[0] = 0;
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}
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else
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{
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// Set it
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ASSERT(!g_osiDriverName[0]);
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lstrcpy(g_osiDriverName, szDriverName);
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}
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DebugExitVOID(OSI_SetDriverName);
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}
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//
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// OSI_FunctionRequest - see osi.h
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//
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BOOL OSI_FunctionRequest
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(
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DWORD escapeFn,
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LPOSI_ESCAPE_HEADER pRequest,
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DWORD requestLen
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)
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{
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BOOL rc = FALSE;
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ULONG iEsc;
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HDC hdc;
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DebugEntry(OSI_FunctionRequest);
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if (!g_osiDriverName[0])
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{
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// NT 4.x case
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TRACE_OUT(("OSI_FunctionRequest: Creating %s driver DC",
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s_osiDisplayName));
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hdc = CreateDC(s_osiDisplayName, NULL, NULL, NULL);
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}
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else
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{
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// NT 5 case
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TRACE_OUT(("OSI_FunctionRequest: Creating %s driver DC",
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g_osiDriverName));
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hdc = CreateDC(NULL, g_osiDriverName, NULL, NULL);
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}
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if (!hdc)
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{
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ERROR_OUT(("Failed to create DC to talk to driver '%s'", g_osiDriverName));
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DC_QUIT;
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}
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TRACE_OUT(("OSI_FunctionRequest: Created %s driver DC %08x",
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g_osiDriverName, hdc));
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//
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// Pass the request on to the display driver.
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//
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pRequest->padding = 0;
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pRequest->identifier = OSI_ESCAPE_IDENTIFIER;
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pRequest->escapeFn = escapeFn;
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pRequest->version = DCS_MAKE_VERSION();
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if ((escapeFn >= OSI_HET_WO_ESC_FIRST) && (escapeFn <= OSI_HET_WO_ESC_LAST))
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{
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iEsc = WNDOBJ_SETUP;
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}
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else
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{
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iEsc = OSI_ESC_CODE;
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}
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if (0 >= ExtEscape(hdc, iEsc, requestLen, (LPCSTR)pRequest,
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requestLen, (LPSTR)pRequest))
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{
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WARNING_OUT(("ExtEscape %x code %d failed", iEsc, escapeFn));
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}
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else
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{
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rc = TRUE;
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}
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DC_EXIT_POINT:
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if (hdc)
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{
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DeleteDC(hdc);
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}
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DebugExitDWORD(OSI_FunctionRequest, rc);
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return(rc);
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}
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