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windows-server-2003/multimedia/opengl/mcd/server/mcdsrv.c

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/******************************Module*Header*******************************\
* Module Name: mcdsrv.c
*
* This module contains the trusted component of the MCD server-side engine.
* This module performs handle management and parameter-checking and validation
* to the extent possible. This module also makes the calls to the device
* driver, and provides callbacks to the driver for things such as handle
* referencing.
*
* Goals
* -----
*
* Pervasive throughout this implementation is the influence of the
* following goals:
*
* 1. Robustness
*
* Windows NT is first and foremost a robust operating system. There
* is a simple measure for this: a robust system should never crash.
* Because the display driver is a trusted component of the operating
* system, and because the MCD is directly callable from OpenGL from
* the client side of the OS (and thus untrusted), this has a significant
* impact on the way we must do things.
*
* 2. Performance
*
* Performance is the 'raison d'etre' of the MCD; we have tried to
* have as thin a layer above the rendering code as we could.
*
* 3. Portability
*
* This implementation is intended portable to different processor types,
* and to the Windows 95 operating system.
*
* Obviously, Windows 95 implementations may choose to have a different
* order of priority for these goals, and so some of the robustness
* code may be eliminated. But it is still recommended that it be kept;
* the overhead is reasonably minimal, and people really don't like it
* when their systems crash...
*
* The Rules of Robustness
* -----------------------
*
* 1. Nothing given by the caller can be trusted.
*
* For example, handles cannot be trusted to be valid. Handles passed
* in may actually be for objects not owned by the caller. Pointers
* and offsets may not be correctly aligned. Pointers, offsets, and
* coordinates may be out of bounds.
*
* 2. Parameters can be asynchronously modified at any time.
*
* Many commands come from shared memory sections, and any data therein
* may be asynchronously modified by other threads in the calling
* application. As such, parameters may never be validated in-place
* in the shared section, because the application may corrupt the data
* after validation but before its use. Instead, parameters must always
* be first copied out of the window, and then validated on the safe
* copy.
*
* 3. We must clean up.
*
* Applications may die at any time before calling the appropriate
* clean up functions. As such, we have to be prepared to clean up
* any resources ourselves when the application dies.
*
* Copyright (c) 1994, 1995, 1996 Microsoft Corporation
*
\**************************************************************************/
#include <stddef.h>
#include <stdarg.h>
#include <windows.h>
#include <wtypes.h>
#include <winddi.h>
#include <mcdesc.h>
#include "mcdrv.h"
#include <mcd2hack.h>
#include "mcd.h"
#include "mcdint.h"
#include "mcdrvint.h"
// Checks MCD version to see if the driver can accept direct buffer
// access. Direct access was introduced in 1.1.
#define SUPPORTS_DIRECT(pGlobal) \
((pGlobal)->verMinor >= 0x10 || (pGlobal)->verMajor > 1)
////////////////////////////////////////////////////////////////////////////
//
//
// Declarations for internal support functions for an MCD locking mechanism
// that can be used to synchronize multiple processes/thread that use MCD.
//
//
////////////////////////////////////////////////////////////////////////////
ULONG MCDSrvLock(MCDWINDOWPRIV *);
VOID MCDSrvUnlock(MCDWINDOWPRIV *);
////////////////////////////////////////////////////////////////////////////
//
// Declarations for internal per-driver-instance list that all global
// data is kept in. The list is indexed by pso.
//
////////////////////////////////////////////////////////////////////////////
// Space for one old-style driver to hold its information statically.
MCDGLOBALINFO gStaticGlobalInfo;
BOOL MCDSrvInitGlobalInfo(void);
void MCDSrvUninitGlobalInfo(void);
MCDGLOBALINFO *MCDSrvAddGlobalInfo(SURFOBJ *pso);
MCDGLOBALINFO *MCDSrvGetGlobalInfo(SURFOBJ *pso);
////////////////////////////////////////////////////////////////////////////
//
//
// Server subsystem entry points.
//
//
////////////////////////////////////////////////////////////////////////////
//****************************************************************************
//
// MCD initialization functions.
//
// NT 4.0 MCD support exported MCDEngInit which display drivers call
// to initialize the MCD server-side code. MCDEngInit only allowed
// one driver instance to initialize and never uninitialized.
//
// This doesn't work very well with mode changes or multimon so for
// NT 5.0 MCDEngInitEx was added. MCDEngInitEx has two differences
// from MCDEngInit:
// 1. MCDEngInitEx takes a table of global driver functions instead of
// just the MCDrvGetEntryPoints function. Currently the table only
// has one entry for MCDrvGetEntryPoints but it allows for future
// expansion.
// 2. Calling MCDEngInitEx implies that the driver will call MCDEngUninit
// so that per-driver-instance state can be cleaned up.
//
//****************************************************************************
BOOL MCDEngInternalInit(SURFOBJ *pso,
MCDGLOBALDRIVERFUNCS *pMCDGlobalDriverFuncs,
BOOL bAddPso)
{
MCDSURFACE mcdSurface;
MCDDRIVER mcdDriver;
MCDGLOBALINFO *pGlobal;
mcdSurface.pWnd = NULL;
mcdSurface.pwo = NULL;
mcdSurface.surfaceFlags = 0;
mcdSurface.pso = pso;
memset(&mcdDriver, 0, sizeof(MCDDRIVER));
mcdDriver.ulSize = sizeof(MCDDRIVER);
if (pMCDGlobalDriverFuncs->pMCDrvGetEntryPoints == NULL ||
!pMCDGlobalDriverFuncs->pMCDrvGetEntryPoints(&mcdSurface, &mcdDriver))
{
MCDBG_PRINT("MCDEngInit: Could not get driver entry points.");
return FALSE;
}
if (bAddPso)
{
if (!MCDSrvInitGlobalInfo())
{
return FALSE;
}
pGlobal = MCDSrvAddGlobalInfo(pso);
if (pGlobal == NULL)
{
MCDSrvUninitGlobalInfo();
return FALSE;
}
}
else
{
pGlobal = &gStaticGlobalInfo;
}
// Guaranteed to be zero-filled and pso set so only fill in interesting
// fields.
// verMajor and verMinor can not be filled out yet so they are
// left at zero to indicate the most conservative possible version
// number. They are filled in with correct information when DRIVERINFO
// is processed.
pGlobal->mcdDriver = mcdDriver;
pGlobal->mcdGlobalFuncs = *pMCDGlobalDriverFuncs;
return TRUE;
}
#define MGDF_SIZE (sizeof(ULONG)+sizeof(void *))
BOOL WINAPI MCDEngInitEx(SURFOBJ *pso,
MCDGLOBALDRIVERFUNCS *pMCDGlobalDriverFuncs,
void *pReserved)
{
if (pso == NULL ||
pMCDGlobalDriverFuncs->ulSize != MGDF_SIZE ||
pReserved != NULL)
{
return FALSE;
}
return MCDEngInternalInit(pso, pMCDGlobalDriverFuncs, TRUE);
}
BOOL WINAPI MCDEngInit(SURFOBJ *pso,
MCDRVGETENTRYPOINTSFUNC pGetDriverEntryFunc)
{
MCDGLOBALDRIVERFUNCS mgdf;
// The old-style initialization function is being called so
// we must assume that the uninit function will not be called.
// This means that we cannot allocate resources for the global
// info list since we won't be able to clean them up. Without
// a global info list we are restricted to using global variables
// and thus only one old-style init is allowed per load.
if (pso == NULL ||
pGetDriverEntryFunc == NULL ||
gStaticGlobalInfo.pso != NULL)
{
return FALSE;
}
gStaticGlobalInfo.pso = pso;
memset(&mgdf, 0, sizeof(mgdf));
mgdf.ulSize = sizeof(ULONG)+sizeof(void *);
mgdf.pMCDrvGetEntryPoints = pGetDriverEntryFunc;
return MCDEngInternalInit(pso, &mgdf, FALSE);
}
//****************************************************************************
// BOOL MCDEngEscFilter(SURFOBJ *, ULONG, ULONG, VOID *, ULONG cjOut,
// VOID *pvOut)
//
// MCD escape filter. This function should return TRUE for any
// escapes functions which this filter processed, FALSE otherwise (in which
// case the caller should continue to process the escape).
//****************************************************************************
BOOL WINAPI MCDEngEscFilter(SURFOBJ *pso, ULONG iEsc,
ULONG cjIn, VOID *pvIn,
ULONG cjOut, VOID *pvOut, ULONG_PTR *pRetVal)
{
MCDEXEC MCDExec;
MCDESC_HEADER *pmeh;
MCDESC_HEADER_NTPRIVATE *pmehPriv;
switch (iEsc)
{
case QUERYESCSUPPORT:
// Note: we don't need to check cjIn for this case since
// NT's GDI validates this for use.
return (BOOL)(*pRetVal = (*(ULONG *) pvIn == MCDFUNCS));
case MCDFUNCS:
MCDExec.pmeh = pmeh = (MCDESC_HEADER *)pvIn;
// This is an MCD function. Under Windows NT, we've
// got an MCDESC_HEADER_NTPRIVATE structure which we may need
// to use if the escape does not use driver-created
// memory.
// Package the things we need into the MCDEXEC structure:
pmehPriv = (MCDESC_HEADER_NTPRIVATE *)(pmeh + 1);
MCDExec.ppwoMulti = (WNDOBJ **)pmehPriv->pExtraWndobj;
MCDExec.MCDSurface.pwo = pmehPriv->pwo;
if (pmeh->dwWindow != 0)
{
MCDWINDOWOBJ *pmwo;
// The client side code has given us back the handle
// to the MCDWINDOW structure as an identifier. Since it
// came from user-mode it is suspect and must be validated
// before continuing.
pmwo = (MCDWINDOWOBJ *)
MCDEngGetPtrFromHandle((MCDHANDLE)pmeh->dwWindow,
MCDHANDLE_WINDOW);
if (pmwo == NULL)
{
return FALSE;
}
MCDExec.pWndPriv = &pmwo->MCDWindowPriv;
}
else
{
MCDExec.pWndPriv = NULL;
}
MCDExec.MCDSurface.pso = pso;
MCDExec.MCDSurface.pWnd = (MCDWINDOW *)MCDExec.pWndPriv;
MCDExec.MCDSurface.surfaceFlags = 0;
MCDExec.pvOut = pvOut;
MCDExec.cjOut = cjOut;
if (!pmeh->hSharedMem) {
*pRetVal = (ULONG)FALSE;
if (!pmehPriv->pBuffer)
return (ULONG)TRUE;
if (pmehPriv->bufferSize < sizeof(MCDCMDI))
return (ULONG)TRUE;
MCDExec.pCmd = (MCDCMDI *)(pmehPriv->pBuffer);
MCDExec.pCmdEnd = (MCDCMDI *)((char *)MCDExec.pCmd +
pmehPriv->bufferSize);
MCDExec.inBufferSize = pmehPriv->bufferSize;
MCDExec.hMCDMem = (MCDHANDLE)NULL;
} else
MCDExec.hMCDMem = pmeh->hSharedMem;
ENTER_MCD_LOCK();
*pRetVal = MCDSrvProcess(&MCDExec);
LEAVE_MCD_LOCK();
return TRUE;
default:
return (ULONG)FALSE;
break;
}
return (ULONG)FALSE; // Should never get here...
}
//****************************************************************************
// BOOL MCDEngSetMemStatus(MCDMEM *pMCDMem, ULONG status);
//
// Sets the memory status to the desired value. This is called by the
// driver to set and reset the busy flags for a chunk of memory to allow
// DMA.
//****************************************************************************
BOOL WINAPI MCDEngSetMemStatus(MCDMEM *pMCDMem, ULONG status)
{
MCDMEMOBJ *pMemObj;
ULONG retVal;
pMemObj = (MCDMEMOBJ *)((char *)pMCDMem - sizeof(MCDHANDLETYPE));
if (pMemObj->type != MCDHANDLE_MEM) {
return FALSE;
}
switch (status) {
case MCDRV_MEM_BUSY:
pMemObj->lockCount++;
break;
case MCDRV_MEM_NOT_BUSY:
pMemObj->lockCount--;
break;
default:
return (ULONG)FALSE;
}
return TRUE;
}
////////////////////////////////////////////////////////////////////////////
//
//
// Private server-side funtions.
//
//
////////////////////////////////////////////////////////////////////////////
//****************************************************************************
// CallGetBuffers
//
// Wrapper for MCDrvGetBuffers that does appropriate checks, setup,
// cache management and data translation.
//****************************************************************************
PRIVATE
ULONG CallGetBuffers(MCDEXEC *pMCDExec, MCDRC *pRc, MCDRECTBUFFERS *pBuf)
{
ULONG ulRet;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvGetBuffers)
{
MCDBG_PRINT("MCDrvGetBuffers: missing entry point.");
return FALSE;
}
// Clip lists need to be valid so drivers can do different
// things based on whether the surface is trivially visible or not.
GetScissorClip(pMCDExec->pWndPriv, pMCDExec->pRcPriv);
// Should be casting to MCDRECTBUFFERS with correct
// 1.1 header.
ulRet = (ULONG)(*pMCDExec->pGlobal->mcdDriver.pMCDrvGetBuffers)
(&pMCDExec->MCDSurface, pRc, (MCDBUFFERS *)pBuf);
// Update cached buffers information on success.
if (ulRet)
{
if (SUPPORTS_DIRECT(pMCDExec->pGlobal))
{
// This is a 1.1 or greater driver and has returned
// full MCDRECTBUFFERS information. Cache it
// for possible later use.
pMCDExec->pWndPriv->bBuffersValid = TRUE;
pMCDExec->pWndPriv->mbufCache = *pBuf;
}
else
{
MCDBUFFERS mbuf;
MCDRECTBUFFERS *mrbuf;
// This is a 1.0 driver and has only returned
// MCDBUFFERS information. Expand it into
// an MCDRECTBUFFERS. The rectangles don't
// really matter to software so they can
// be zeroed.
mbuf = *(MCDBUFFERS *)pBuf;
mrbuf = pBuf;
*(MCDBUF *)&mrbuf->mcdFrontBuf = mbuf.mcdFrontBuf;
memset(&mrbuf->mcdFrontBuf.bufPos, 0, sizeof(RECTL));
*(MCDBUF *)&mrbuf->mcdBackBuf = mbuf.mcdBackBuf;
memset(&mrbuf->mcdBackBuf.bufPos, 0, sizeof(RECTL));
*(MCDBUF *)&mrbuf->mcdDepthBuf = mbuf.mcdDepthBuf;
memset(&mrbuf->mcdDepthBuf.bufPos, 0, sizeof(RECTL));
}
}
return ulRet;
}
//****************************************************************************
// ULONG_PTR MCDSrvProcess(MCDEXEC *pMCDExec)
//
// This is the main MCD function handler. At this point, there should
// be no platform-specific code since these should have been resolved by
// the entry function.
//****************************************************************************
PRIVATE
ULONG_PTR MCDSrvProcess(MCDEXEC *pMCDExec)
{
UCHAR *pMaxMem;
UCHAR *pMinMem;
MCDESC_HEADER *pmeh = pMCDExec->pmeh;
MCDRC *pRc;
MCDMEM *pMCDMem;
MCDMEMOBJ *pMemObj;
MCDRCPRIV *pRcPriv;
ULONG_PTR ulRet;
// If the command buffer is in shared memory, dereference the memory
// from the handle and check the bounds.
if (pMCDExec->hMCDMem)
{
GET_MEMOBJ_RETVAL(pMemObj, pmeh->hSharedMem, FALSE);
pMinMem = pMemObj->MCDMem.pMemBase;
// Note: we ignore the memory size in the header since it doesn't
// really help us...
pMaxMem = pMinMem + pMemObj->MCDMem.memSize;
pMCDExec->pCmd = (MCDCMDI *)((char *)pmeh->pSharedMem);
pMCDExec->pCmdEnd = (MCDCMDI *)pMaxMem;
CHECK_MEM_RANGE_RETVAL(pMCDExec->pCmd, pMinMem, pMaxMem, FALSE);
pMCDExec->inBufferSize = pmeh->sharedMemSize;
pMCDExec->pMemObj = pMemObj;
} else
pMCDExec->pMemObj = (MCDMEMOBJ *)NULL;
// Get the rendering context if we have one, and process the command:
if (pmeh->hRC)
{
MCDRCOBJ *pRcObj;
pRcObj = (MCDRCOBJ *)MCDEngGetPtrFromHandle(pmeh->hRC, MCDHANDLE_RC);
if (!pRcObj)
{
MCDBG_PRINT("MCDSrvProcess: Invalid rendering context handle %x.",
pmeh->hRC);
return FALSE;
}
pMCDExec->pRcPriv = pRcPriv = pRcObj->pRcPriv;
if (!pRcPriv->bValid)
{
MCDBG_PRINT("MCDSrvProcess: RC has been invalidated for this window.");
return FALSE;
}
if ((!pMCDExec->pWndPriv)) {
if (pMCDExec->pCmd->command != MCD_BINDCONTEXT) {
MCDBG_PRINT("MCDSrvProcess: NULL WndObj with RC.");
return FALSE;
}
} else {
// Validate the window in the RC with the window for this escape:
if ((pRcPriv->hWnd != pMCDExec->pWndPriv->hWnd) &&
(pMCDExec->pCmd->command != MCD_BINDCONTEXT))
{
MCDBG_PRINT("MCDSrvProcess: Invalid RC for this window.");
return FALSE;
}
}
// For Win95, we need to poll for the clip region:
// Clipping needs to be un-broken
if (pMCDExec->MCDSurface.pwo != NULL)
{
MCDEngUpdateClipList(pMCDExec->MCDSurface.pwo);
}
pMCDExec->MCDSurface.surfaceFlags |= pRcPriv->surfaceFlags;
} else {
pMCDExec->pRcPriv = (MCDRCPRIV *)NULL;
}
// Get global driver information.
if (pMCDExec->pWndPriv != NULL)
{
pMCDExec->pGlobal = pMCDExec->pWndPriv->pGlobal;
}
else if (pMCDExec->pRcPriv != NULL)
{
pMCDExec->pGlobal = pMCDExec->pRcPriv->pGlobal;
}
else
{
pMCDExec->pGlobal =
MCDSrvGetGlobalInfo(pMCDExec->MCDSurface.pso);
if (pMCDExec->pGlobal == NULL)
{
MCDBG_PRINT("Unable to find global information");
return FALSE;
}
}
// If direct surface information was included then
// fill out the extra surface information in the MCDSURFACE
// NOCLIP setting?
#if MCD_VER_MAJOR >= 2 || (MCD_VER_MAJOR == 1 && MCD_VER_MINOR >= 0x10)
pMCDExec->MCDSurface.direct.mcdFrontBuf.bufFlags = 0;
pMCDExec->MCDSurface.direct.mcdBackBuf.bufFlags = 0;
pMCDExec->MCDSurface.direct.mcdDepthBuf.bufFlags = 0;
pMCDExec->MCDSurface.frontId = 0;
pMCDExec->MCDSurface.backId = 0;
pMCDExec->MCDSurface.depthId = 0;
if (pmeh->flags & MCDESC_FL_SURFACES)
{
pMCDExec->MCDSurface.surfaceFlags |= MCDSURFACE_DIRECT;
// Refresh cached buffer information if it's invalid
// and we need it
if (pmeh->msrfColor.hSurf == NULL &&
pmeh->msrfDepth.hSurf == NULL)
{
if (pMCDExec->pWndPriv == NULL)
{
return FALSE;
}
if (!pMCDExec->pWndPriv->bBuffersValid)
{
MCDRECTBUFFERS mbuf;
if (!CallGetBuffers(pMCDExec, NULL, &mbuf))
{
return FALSE;
}
}
pMCDExec->MCDSurface.direct = pMCDExec->pWndPriv->mbufCache;
}
else
{
if (pmeh->msrfColor.hSurf != NULL)
{
pMCDExec->MCDSurface.frontId = (DWORD)
pmeh->msrfColor.hSurf;
pMCDExec->MCDSurface.direct.mcdFrontBuf.bufFlags =
MCDBUF_ENABLED;
pMCDExec->MCDSurface.direct.mcdFrontBuf.bufOffset =
pmeh->msrfColor.lOffset;
pMCDExec->MCDSurface.direct.mcdFrontBuf.bufStride =
pmeh->msrfColor.lStride;
pMCDExec->MCDSurface.direct.mcdFrontBuf.bufPos =
pmeh->msrfColor.rclPos;
}
if (pmeh->msrfDepth.hSurf != NULL)
{
pMCDExec->MCDSurface.depthId = (DWORD)
pmeh->msrfDepth.hSurf;
pMCDExec->MCDSurface.direct.mcdDepthBuf.bufFlags =
MCDBUF_ENABLED;
pMCDExec->MCDSurface.direct.mcdDepthBuf.bufOffset =
pmeh->msrfDepth.lOffset;
pMCDExec->MCDSurface.direct.mcdDepthBuf.bufStride =
pmeh->msrfDepth.lStride;
pMCDExec->MCDSurface.direct.mcdDepthBuf.bufPos =
pmeh->msrfDepth.rclPos;
}
}
}
#endif // 1.1
/////////////////////////////////////////////////////////////////
// If the drawing-batch flag is set, call the main driver drawing
// routine:
/////////////////////////////////////////////////////////////////
if (pmeh->flags & MCDESC_FL_BATCH)
{
CHECK_FOR_RC(pMCDExec);
CHECK_FOR_MEM(pMCDExec);
GetScissorClip(pMCDExec->pWndPriv, pMCDExec->pRcPriv);
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvDraw)
{
if (pMCDExec->pGlobal->mcdDriver.pMCDrvSync)
{
(*pMCDExec->pGlobal->mcdDriver.pMCDrvSync)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
}
return (ULONG_PTR)pMCDExec->pCmd;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvDraw)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, &pMemObj->MCDMem,
(UCHAR *)pMCDExec->pCmd, (UCHAR *)pMCDExec->pCmdEnd);
}
if (pmeh->flags & MCDESC_FL_CREATE_CONTEXT)
{
MCDCREATECONTEXT *pmcc = (MCDCREATECONTEXT *)pMCDExec->pCmd;
MCDRCINFOPRIV *pMcdRcInfo = pmcc->pRcInfo;
CHECK_SIZE_IN(pMCDExec, MCDCREATECONTEXT);
CHECK_SIZE_OUT(pMCDExec, MCDRCINFOPRIV);
try {
EngProbeForRead(pMcdRcInfo, sizeof(MCDRCINFOPRIV),
sizeof(ULONG));
RtlCopyMemory(pMCDExec->pvOut, pMcdRcInfo,
sizeof(MCDRCINFOPRIV));
} except (EXCEPTION_EXECUTE_HANDLER) {
MCDBG_PRINT("MCDrvCreateContext: Invalid memory for MCDRCINFO.");
return FALSE;
}
pMcdRcInfo = (MCDRCINFOPRIV *)pMCDExec->pvOut;
pMcdRcInfo->mri.requestFlags = 0;
return (ULONG_PTR)MCDSrvCreateContext(&pMCDExec->MCDSurface,
pMcdRcInfo, pMCDExec->pGlobal,
pmcc->ipfd, pmcc->iLayer,
pmcc->escCreate.hwnd,
pmcc->escCreate.flags,
pmcc->mcdFlags);
}
////////////////////////////////////////////////////////////////////
// Now, process all of the non-batched drawing and utility commands:
////////////////////////////////////////////////////////////////////
switch (pMCDExec->pCmd->command) {
case MCD_DESCRIBEPIXELFORMAT:
CHECK_SIZE_IN(pMCDExec, MCDPIXELFORMATCMDI);
if (pMCDExec->pvOut) {
CHECK_SIZE_OUT(pMCDExec, MCDPIXELFORMAT);
}
{
MCDPIXELFORMATCMDI *pMCDPixelFormat =
(MCDPIXELFORMATCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvDescribePixelFormat)
return 0;
return (*pMCDExec->pGlobal->mcdDriver.pMCDrvDescribePixelFormat)
(&pMCDExec->MCDSurface,
pMCDPixelFormat->iPixelFormat,
pMCDExec->cjOut,
pMCDExec->pvOut, 0);
}
case MCD_DRIVERINFO:
CHECK_SIZE_OUT(pMCDExec, MCDDRIVERINFOI);
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvInfo)
return FALSE;
ulRet = (*pMCDExec->pGlobal->mcdDriver.pMCDrvInfo)
(&pMCDExec->MCDSurface,
(MCDDRIVERINFO *)pMCDExec->pvOut);
if (ulRet)
{
// Copy driver function information so that the client
// side can optimize calls by checking for functions on the
// client side.
memcpy(&((MCDDRIVERINFOI *)pMCDExec->pvOut)->mcdDriver,
&pMCDExec->pGlobal->mcdDriver, sizeof(MCDDRIVER));
// Save version information in global info.
pMCDExec->pGlobal->verMajor =
((MCDDRIVERINFO *)pMCDExec->pvOut)->verMajor;
pMCDExec->pGlobal->verMinor =
((MCDDRIVERINFO *)pMCDExec->pvOut)->verMinor;
}
return ulRet;
case MCD_DELETERC:
CHECK_FOR_RC(pMCDExec);
return (ULONG_PTR)DestroyMCDObj(pmeh->hRC, MCDHANDLE_RC);
case MCD_ALLOC:
CHECK_SIZE_IN(pMCDExec, MCDALLOCCMDI);
CHECK_SIZE_OUT(pMCDExec, MCDHANDLE *);
CHECK_FOR_RC(pMCDExec);
{
MCDALLOCCMDI *pAllocCmd =
(MCDALLOCCMDI *)pMCDExec->pCmd;
return (ULONG_PTR)MCDSrvAllocMem(pMCDExec, pAllocCmd->numBytes,
pAllocCmd->flags,
(MCDHANDLE *)pMCDExec->pvOut);
}
case MCD_FREE:
CHECK_SIZE_IN(pMCDExec, MCDFREECMDI);
{
MCDFREECMDI *pFreeCmd =
(MCDFREECMDI *)pMCDExec->pCmd;
return (ULONG_PTR)DestroyMCDObj(pFreeCmd->hMCDMem, MCDHANDLE_MEM);
}
case MCD_STATE:
CHECK_SIZE_IN(pMCDExec, MCDSTATECMDI);
CHECK_FOR_RC(pMCDExec);
CHECK_FOR_MEM(pMCDExec);
{
MCDSTATECMDI *pStateCmd =
(MCDSTATECMDI *)pMCDExec->pCmd;
UCHAR *pStart = (UCHAR *)(pStateCmd + 1);
LONG totalBytes = pMCDExec->inBufferSize -
sizeof(MCDSTATECMDI);
if (totalBytes < 0) {
MCDBG_PRINT("MCDState: state buffer too small ( < 0).");
return FALSE;
}
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvState) {
MCDBG_PRINT("MCDrvState: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvState)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, &pMemObj->MCDMem, pStart,
totalBytes, pStateCmd->numStates);
}
case MCD_VIEWPORT:
CHECK_SIZE_IN(pMCDExec, MCDVIEWPORTCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDVIEWPORTCMDI *pViewportCmd =
(MCDVIEWPORTCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvViewport) {
MCDBG_PRINT("MCDrvViewport: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvViewport)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, &pViewportCmd->MCDViewport);
}
case MCD_QUERYMEMSTATUS:
CHECK_SIZE_IN(pMCDExec, MCDMEMSTATUSCMDI);
{
MCDMEMSTATUSCMDI *pQueryMemCmd =
(MCDMEMSTATUSCMDI *)pMCDExec->pCmd;
return MCDSrvQueryMemStatus(pMCDExec, pQueryMemCmd->hMCDMem);
}
case MCD_READSPAN:
case MCD_WRITESPAN:
CHECK_SIZE_IN(pMCDExec, MCDSPANCMDI);
CHECK_FOR_RC(pMCDExec);
GetScissorClip(pMCDExec->pWndPriv, pMCDExec->pRcPriv);
{
MCDSPANCMDI *pSpanCmd =
(MCDSPANCMDI *)pMCDExec->pCmd;
GET_MEMOBJ_RETVAL(pMemObj, pSpanCmd->hMem, FALSE);
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvSpan) {
MCDBG_PRINT("MCDrvSpan: missing entry point.");
return FALSE;
}
pMinMem = pMemObj->MCDMem.pMemBase;
pMaxMem = pMinMem + pMemObj->MCDMem.memSize;
// At least check that the first pixel is in range. The driver
// must validate the end pixel...
CHECK_MEM_RANGE_RETVAL(pSpanCmd->MCDSpan.pPixels, pMinMem, pMaxMem, FALSE);
if (pMCDExec->pCmd->command == MCD_READSPAN)
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvSpan)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, &pMemObj->MCDMem, &pSpanCmd->MCDSpan, TRUE);
else
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvSpan)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, &pMemObj->MCDMem, &pSpanCmd->MCDSpan, FALSE);
}
case MCD_CLEAR:
CHECK_SIZE_IN(pMCDExec, MCDCLEARCMDI);
CHECK_FOR_RC(pMCDExec);
GetScissorClip(pMCDExec->pWndPriv, pMCDExec->pRcPriv);
{
MCDCLEARCMDI *pClearCmd =
(MCDCLEARCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvClear) {
MCDBG_PRINT("MCDrvClear: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvClear)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc, pClearCmd->buffers);
}
case MCD_SWAP:
CHECK_SIZE_IN(pMCDExec, MCDSWAPCMDI);
CHECK_FOR_WND(pMCDExec);
GetScissorClip(pMCDExec->pWndPriv, NULL);
{
MCDSWAPCMDI *pSwapCmd =
(MCDSWAPCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvSwap) {
MCDBG_PRINT("MCDrvSwap: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvSwap)
(&pMCDExec->MCDSurface,
pSwapCmd->flags);
}
case MCD_SCISSOR:
CHECK_SIZE_IN(pMCDExec, MCDSCISSORCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDSCISSORCMDI *pMCDScissor = (MCDSCISSORCMDI *)pMCDExec->pCmd;
return (ULONG_PTR)MCDSrvSetScissor(pMCDExec, &pMCDScissor->rect,
pMCDScissor->bEnabled);
}
break;
case MCD_ALLOCBUFFERS:
CHECK_SIZE_IN(pMCDExec, MCDALLOCBUFFERSCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDALLOCBUFFERSCMDI *pMCDAllocBuffersCmd = (MCDALLOCBUFFERSCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pWndPriv->bRegionValid)
pMCDExec->pWndPriv->MCDWindow.clientRect =
pMCDAllocBuffersCmd->WndRect;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvAllocBuffers) {
MCDBG_PRINT("MCDrvAllocBuffers: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvAllocBuffers)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
}
break;
case MCD_GETBUFFERS:
CHECK_SIZE_IN(pMCDExec, MCDGETBUFFERSCMDI);
CHECK_SIZE_OUT(pMCDExec, MCDRECTBUFFERS);
CHECK_FOR_RC(pMCDExec);
return CallGetBuffers(pMCDExec, &pMCDExec->pRcPriv->MCDRc,
(MCDRECTBUFFERS *)pMCDExec->pvOut);
case MCD_LOCK:
CHECK_SIZE_IN(pMCDExec, MCDLOCKCMDI);
CHECK_FOR_RC(pMCDExec);
return MCDSrvLock(pMCDExec->pWndPriv);
break;
case MCD_UNLOCK:
CHECK_SIZE_IN(pMCDExec, MCDLOCKCMDI);
CHECK_FOR_RC(pMCDExec);
MCDSrvUnlock(pMCDExec->pWndPriv);
return TRUE;
break;
case MCD_BINDCONTEXT:
CHECK_SIZE_IN(pMCDExec, MCDBINDCONTEXTCMDI);
CHECK_FOR_RC(pMCDExec);
{
ULONG_PTR retVal;
MCDBINDCONTEXTCMDI *pMCDBindContext = (MCDBINDCONTEXTCMDI *)pMCDExec->pCmd;
MCDWINDOW *pWndRes;
if ((!pMCDExec->pWndPriv)) {
pWndRes = MCDSrvNewMCDWindow(&pMCDExec->MCDSurface,
pMCDBindContext->hWnd,
pMCDExec->pGlobal,
pMCDExec->pRcPriv->hDev);
if (!pWndRes)
{
MCDBG_PRINT("MCDBindContext: Creation of window object failed.");
return 0;
}
pMCDExec->pWndPriv = (MCDWINDOWPRIV *)pWndRes;
}
if (!pMCDExec->MCDSurface.pWnd) {
MCDBG_PRINT("MCDrvBindContext: NULL surface.");
return 0;
}
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvBindContext) {
MCDBG_PRINT("MCDrvBindContext: missing entry point.");
return 0;
}
retVal = (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvBindContext)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
if (retVal)
{
pRcPriv->hWnd = pMCDBindContext->hWnd;
retVal = (ULONG_PTR)pMCDExec->pWndPriv->handle;
}
return retVal;
}
break;
case MCD_SYNC:
CHECK_SIZE_IN(pMCDExec, MCDSYNCCMDI);
CHECK_FOR_RC(pMCDExec);
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvSync) {
MCDBG_PRINT("MCDrvSync: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvSync)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
break;
case MCD_CREATE_TEXTURE:
CHECK_SIZE_IN(pMCDExec, MCDCREATETEXCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDCREATETEXCMDI *pMCDCreateTex =
(MCDCREATETEXCMDI *)pMCDExec->pCmd;
return (ULONG_PTR)MCDSrvCreateTexture(pMCDExec,
pMCDCreateTex->pTexData,
pMCDCreateTex->pSurface,
pMCDCreateTex->flags);
}
break;
case MCD_DELETE_TEXTURE:
CHECK_SIZE_IN(pMCDExec, MCDDELETETEXCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDDELETETEXCMDI *pMCDDeleteTex =
(MCDDELETETEXCMDI *)pMCDExec->pCmd;
return (ULONG_PTR)DestroyMCDObj(pMCDDeleteTex->hTex,
MCDHANDLE_TEXTURE);
}
break;
case MCD_UPDATE_SUB_TEXTURE:
CHECK_SIZE_IN(pMCDExec, MCDUPDATESUBTEXCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDUPDATESUBTEXCMDI *pMCDUpdateSubTex =
(MCDUPDATESUBTEXCMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDUpdateSubTex->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj ||
!pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateSubTexture)
return FALSE;
pTexObj->MCDTexture.pMCDTextureData = pMCDUpdateSubTex->pTexData;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateSubTexture)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
&pTexObj->MCDTexture,
pMCDUpdateSubTex->lod,
&pMCDUpdateSubTex->rect);
}
break;
case MCD_UPDATE_TEXTURE_PALETTE:
CHECK_SIZE_IN(pMCDExec, MCDUPDATETEXPALETTECMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDUPDATETEXPALETTECMDI *pMCDUpdateTexPalette =
(MCDUPDATETEXPALETTECMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDUpdateTexPalette->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj ||
!pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTexturePalette)
return FALSE;
pTexObj->MCDTexture.pMCDTextureData = pMCDUpdateTexPalette->pTexData;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTexturePalette)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
&pTexObj->MCDTexture,
pMCDUpdateTexPalette->start,
pMCDUpdateTexPalette->numEntries);
}
break;
case MCD_UPDATE_TEXTURE_PRIORITY:
CHECK_SIZE_IN(pMCDExec, MCDUPDATETEXPRIORITYCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDUPDATETEXPRIORITYCMDI *pMCDUpdateTexPriority =
(MCDUPDATETEXPRIORITYCMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDUpdateTexPriority->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj ||
!pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTexturePriority)
return FALSE;
pTexObj->MCDTexture.pMCDTextureData = pMCDUpdateTexPriority->pTexData;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTexturePriority)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
&pTexObj->MCDTexture);
}
break;
case MCD_UPDATE_TEXTURE_STATE:
CHECK_SIZE_IN(pMCDExec, MCDUPDATETEXSTATECMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDUPDATETEXSTATECMDI *pMCDUpdateTexState =
(MCDUPDATETEXSTATECMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDUpdateTexState->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj ||
!pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTextureState)
return FALSE;
pTexObj->MCDTexture.pMCDTextureData = pMCDUpdateTexState->pTexData;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvUpdateTextureState)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
&pTexObj->MCDTexture);
}
break;
case MCD_TEXTURE_STATUS:
CHECK_SIZE_IN(pMCDExec, MCDTEXSTATUSCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDTEXSTATUSCMDI *pMCDTexStatus =
(MCDTEXSTATUSCMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDTexStatus->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj ||
!pMCDExec->pGlobal->mcdDriver.pMCDrvTextureStatus)
return FALSE;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvTextureStatus)(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
&pTexObj->MCDTexture);
}
break;
case MCD_GET_TEXTURE_KEY:
CHECK_SIZE_IN(pMCDExec, MCDTEXKEYCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDTEXKEYCMDI *pMCDTexKey =
(MCDTEXKEYCMDI *)pMCDExec->pCmd;
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)MCDEngGetPtrFromHandle((MCDHANDLE)pMCDTexKey->hTex,
MCDHANDLE_TEXTURE);
if (!pTexObj)
return FALSE;
return pTexObj->MCDTexture.textureKey;
}
break;
case MCD_DESCRIBELAYERPLANE:
CHECK_SIZE_IN(pMCDExec, MCDLAYERPLANECMDI);
if (pMCDExec->pvOut) {
CHECK_SIZE_OUT(pMCDExec, MCDLAYERPLANE);
}
{
MCDLAYERPLANECMDI *pMCDLayerPlane =
(MCDLAYERPLANECMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvDescribeLayerPlane)
return 0;
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvDescribeLayerPlane)
(&pMCDExec->MCDSurface,
pMCDLayerPlane->iPixelFormat,
pMCDLayerPlane->iLayerPlane,
pMCDExec->cjOut,
pMCDExec->pvOut, 0);
}
break;
case MCD_SETLAYERPALETTE:
CHECK_SIZE_IN(pMCDExec, MCDSETLAYERPALCMDI);
{
MCDSETLAYERPALCMDI *pMCDSetLayerPal =
(MCDSETLAYERPALCMDI *)pMCDExec->pCmd;
// Check to see if palette array is big enough.
CHECK_MEM_RANGE_RETVAL(&pMCDSetLayerPal->acr[pMCDSetLayerPal->cEntries-1],
pMCDExec->pCmd, pMCDExec->pCmdEnd, FALSE);
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvSetLayerPalette) {
MCDBG_PRINT("MCDrvSetLayerPalette: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(*pMCDExec->pGlobal->mcdDriver.pMCDrvSetLayerPalette)
(&pMCDExec->MCDSurface,
pMCDSetLayerPal->iLayerPlane,
pMCDSetLayerPal->bRealize,
pMCDSetLayerPal->cEntries,
&pMCDSetLayerPal->acr[0]);
}
break;
case MCD_DRAW_PIXELS:
CHECK_SIZE_IN(pMCDExec, MCDDRAWPIXELSCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDDRAWPIXELSCMDI *pMCDPix =
(MCDDRAWPIXELSCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvDrawPixels) {
MCDBG_PRINT("MCDrvDrawPixels: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(pMCDExec->pGlobal->mcdDriver.pMCDrvDrawPixels)(
&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
pMCDPix->width,
pMCDPix->height,
pMCDPix->format,
pMCDPix->type,
pMCDPix->pPixels,
pMCDPix->packed);
}
break;
case MCD_READ_PIXELS:
CHECK_SIZE_IN(pMCDExec, MCDREADPIXELSCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDREADPIXELSCMDI *pMCDPix =
(MCDREADPIXELSCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvReadPixels) {
MCDBG_PRINT("MCDrvReadPixels: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(pMCDExec->pGlobal->mcdDriver.pMCDrvReadPixels)(
&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
pMCDPix->x,
pMCDPix->y,
pMCDPix->width,
pMCDPix->height,
pMCDPix->format,
pMCDPix->type,
pMCDPix->pPixels);
}
break;
case MCD_COPY_PIXELS:
CHECK_SIZE_IN(pMCDExec, MCDCOPYPIXELSCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDCOPYPIXELSCMDI *pMCDPix =
(MCDCOPYPIXELSCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvCopyPixels) {
MCDBG_PRINT("MCDrvCopyPixels: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(pMCDExec->pGlobal->mcdDriver.pMCDrvCopyPixels)(
&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
pMCDPix->x,
pMCDPix->y,
pMCDPix->width,
pMCDPix->height,
pMCDPix->type);
}
break;
case MCD_PIXEL_MAP:
CHECK_SIZE_IN(pMCDExec, MCDPIXELMAPCMDI);
CHECK_FOR_RC(pMCDExec);
{
MCDPIXELMAPCMDI *pMCDPix =
(MCDPIXELMAPCMDI *)pMCDExec->pCmd;
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvPixelMap) {
MCDBG_PRINT("MCDrvPixelMap: missing entry point.");
return FALSE;
}
return (ULONG_PTR)(pMCDExec->pGlobal->mcdDriver.pMCDrvPixelMap)(
&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc,
pMCDPix->mapType,
pMCDPix->mapSize,
pMCDPix->pMap);
}
break;
case MCD_DESTROY_WINDOW:
CHECK_SIZE_IN(pMCDExec, MCDDESTROYWINDOWCMDI);
{
if (pMCDExec->pWndPriv == NULL)
{
MCDBG_PRINT("MCDrvDestroyWindow: NULL window\n");
return FALSE;
}
MCDEngDeleteObject(pMCDExec->pWndPriv->handle);
return TRUE;
}
break;
case MCD_GET_TEXTURE_FORMATS:
CHECK_SIZE_IN(pMCDExec, MCDGETTEXTUREFORMATSCMDI);
{
MCDGETTEXTUREFORMATSCMDI *pmgtf =
(MCDGETTEXTUREFORMATSCMDI *)pMCDExec->pCmd;
if (pMCDExec->pvOut)
{
CHECK_SIZE_OUT(pMCDExec,
pmgtf->nFmts*sizeof(DDSURFACEDESC));
}
#if MCD_VER_MAJOR >= 2 || (MCD_VER_MAJOR == 1 && MCD_VER_MINOR >= 0x10)
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvGetTextureFormats)
{
MCDBG_PRINT("MCDrvGetTextureFormats: "
"missing entry point.");
return 0;
}
return (pMCDExec->pGlobal->mcdDriver.pMCDrvGetTextureFormats)(
&pMCDExec->MCDSurface,
pmgtf->nFmts,
(DDSURFACEDESC *)pMCDExec->pvOut);
#else
return 0;
#endif // 1.1
}
break;
case MCD_SWAP_MULTIPLE:
CHECK_SIZE_IN(pMCDExec, MCDSWAPMULTIPLECMDI);
{
MCDSWAPMULTIPLECMDI *pSwapCmd =
(MCDSWAPMULTIPLECMDI *)pMCDExec->pCmd;
MCDWINDOWPRIV *apWndPriv[MCDESC_MAX_EXTRA_WNDOBJ];
UINT i;
MCDWINDOWOBJ *pmwo;
MCDRVSWAPMULTIPLEFUNC pSwapMultFunc;
ULONG_PTR dwRet;
pSwapMultFunc = NULL;
for (i = 0; i < pSwapCmd->cBuffers; i++)
{
if (pMCDExec->ppwoMulti[i] != NULL)
{
pmwo = (MCDWINDOWOBJ *)
MCDEngGetPtrFromHandle((MCDHANDLE)
pSwapCmd->adwMcdWindow[i],
MCDHANDLE_WINDOW);
}
else
{
pmwo = NULL;
}
if (pmwo == NULL)
{
apWndPriv[i] = NULL;
}
else
{
apWndPriv[i] = &pmwo->MCDWindowPriv;
GetScissorClip(apWndPriv[i], NULL);
#if MCD_VER_MAJOR >= 2 || (MCD_VER_MAJOR == 1 && MCD_VER_MINOR >= 0x10)
if (pSwapMultFunc == NULL)
{
pSwapMultFunc = apWndPriv[i]->pGlobal->mcdDriver.
pMCDrvSwapMultiple;
}
else if (pSwapMultFunc !=
apWndPriv[i]->pGlobal->mcdDriver.
pMCDrvSwapMultiple)
{
MCDBG_PRINT("MCDrvSwapMultiple: "
"Mismatched SwapMultiple");
return FALSE;
}
#endif // 1.1
}
}
if (pSwapMultFunc != NULL)
{
dwRet = pSwapMultFunc(pMCDExec->MCDSurface.pwo->psoOwner,
pSwapCmd->cBuffers,
(MCDWINDOW **)apWndPriv,
(UINT *)pSwapCmd->auiFlags);
}
else
{
MCDSURFACE *pms;
dwRet = 0;
pms = &pMCDExec->MCDSurface;
for (i = 0; i < pSwapCmd->cBuffers; i++)
{
if (apWndPriv[i] == NULL)
{
continue;
}
if (apWndPriv[i]->pGlobal->mcdDriver.
pMCDrvSwap == NULL)
{
MCDBG_PRINT("MCDrvSwapMultiple: Missing Swap");
}
else
{
pms->pWnd = (MCDWINDOW *)apWndPriv[i];
pms->pso = pMCDExec->ppwoMulti[i]->psoOwner;
pms->pwo = pMCDExec->ppwoMulti[i];
pms->surfaceFlags = 0;
if (apWndPriv[i]->pGlobal->mcdDriver.
pMCDrvSwap(pms, pSwapCmd->auiFlags[i]))
{
dwRet |= 1 << i;
}
}
}
}
return dwRet;
}
break;
case MCD_PROCESS:
CHECK_SIZE_IN(pMCDExec, MCDPROCESSCMDI);
CHECK_FOR_RC(pMCDExec);
CHECK_FOR_MEM(pMCDExec);
{
MCDPROCESSCMDI *pmp = (MCDPROCESSCMDI *)pMCDExec->pCmd;
// Validate command buffer
GET_MEMOBJ_RETVAL(pMemObj, pmp->hMCDPrimMem,
(ULONG_PTR)pmp->pMCDFirstCmd);
pMinMem = pMemObj->MCDMem.pMemBase;
// Note: we ignore the memory size in the header since it
// doesn't really help us...
pMaxMem = pMinMem + pMemObj->MCDMem.memSize;
CHECK_MEM_RANGE_RETVAL(pmp->pMCDFirstCmd, pMinMem,
pMaxMem, (ULONG_PTR)pmp->pMCDFirstCmd);
// Validate user-mode pointers passed down.
__try
{
EngProbeForRead(pmp->pMCDTransform, sizeof(MCDTRANSFORM),
sizeof(DWORD));
// No meaningful check of the material changes can be
// done. The driver is responsible for probing
// addresses used.
}
__except(EXCEPTION_EXECUTE_HANDLER)
{
return (ULONG_PTR)pmp->pMCDFirstCmd;
}
GetScissorClip(pMCDExec->pWndPriv, pMCDExec->pRcPriv);
#if MCD_VER_MAJOR >= 2
if (!pMCDExec->pGlobal->mcdDriver.pMCDrvProcess)
{
if (pMCDExec->pGlobal->mcdDriver.pMCDrvSync)
{
(*pMCDExec->pGlobal->mcdDriver.pMCDrvSync)
(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
}
return (ULONG_PTR)pmp->pMCDFirstCmd;
}
return (pMCDExec->pGlobal->mcdDriver.pMCDrvProcess)(
&pMCDExec->MCDSurface, &pMCDExec->pRcPriv->MCDRc,
&pMemObj->MCDMem, (UCHAR *)pmp->pMCDFirstCmd, pMaxMem,
pmp->cmdFlagsAll, pmp->primFlags, pmp->pMCDTransform,
pmp->pMCDMatChanges);
#else
if (pMCDExec->pGlobal->mcdDriver.pMCDrvSync)
{
(*pMCDExec->pGlobal->mcdDriver.pMCDrvSync)
(&pMCDExec->MCDSurface,
&pMCDExec->pRcPriv->MCDRc);
}
return (ULONG_PTR)pmp->pMCDFirstCmd;
#endif // 2.0
}
break;
default:
MCDBG_PRINT("MCDSrvProcess: "
"Null rendering context invalid for command %d.",
pMCDExec->pCmd->command);
return FALSE;
}
return FALSE; // should never get here...
}
//****************************************************************************
// FreeRCObj()
//
// Engine callback for freeing the memory used for rendering-context
// handles.
//****************************************************************************
BOOL CALLBACK FreeRCObj(DRIVEROBJ *pDrvObj)
{
MCDRCOBJ *pRcObj = (MCDRCOBJ *)pDrvObj->pvObj;
MCDRCPRIV *pRcPriv = pRcObj->pRcPriv;
if ((pRcPriv->bDrvValid) &&
(pRcPriv->pGlobal->mcdDriver.pMCDrvDeleteContext))
{
(*pRcPriv->pGlobal->mcdDriver.pMCDrvDeleteContext)
(&pRcPriv->MCDRc, pDrvObj->dhpdev);
}
MCDSrvLocalFree((UCHAR *)pRcPriv);
MCDSrvLocalFree((UCHAR *)pRcObj);
return TRUE;
}
//****************************************************************************
// MCDSrvCreateContext()
//
// Create a rendering context (RGBA or color-indexed) for the current
// hardware mode. This call will also initialize window-tracking for
// the context (which is associated with the specified window).
//****************************************************************************
PRIVATE
MCDHANDLE MCDSrvCreateContext(MCDSURFACE *pMCDSurface,
MCDRCINFOPRIV *pMcdRcInfo,
MCDGLOBALINFO *pGlobal,
LONG iPixelFormat,
LONG iLayer,
HWND hWnd,
ULONG surfaceFlags,
ULONG contextFlags)
{
MCDWINDOW *pWnd;
MCDWINDOWPRIV *pWndPriv;
MCDRCPRIV *pRcPriv;
MCDHANDLE retVal;
HWND hwnd;
MCDRCOBJ *newRcObject;
MCDRVTRACKWINDOWFUNC pTrackFunc = NULL;
if (pGlobal->mcdDriver.pMCDrvCreateContext == NULL)
{
MCDBG_PRINT("MCDSrvCreateContext: No MCDrvCreateContext.");
return NULL;
}
pRcPriv = (MCDRCPRIV *)MCDSrvLocalAlloc(0,sizeof(MCDRCPRIV));
if (!pRcPriv) {
MCDBG_PRINT("MCDSrvCreateContext: Could not allocate new context.");
return (MCDHANDLE)NULL;
}
pRcPriv->pGlobal = pGlobal;
// Cache the engine handle provided by the driver:
pRcPriv->hDev = (*pGlobal->mcdDriver.pMCDrvGetHdev)(pMCDSurface);
if (surfaceFlags & MCDSURFACE_HWND)
{
pMCDSurface->surfaceFlags |= MCDSURFACE_HWND;
}
if (surfaceFlags & MCDSURFACE_DIRECT)
{
pMCDSurface->surfaceFlags |= MCDSURFACE_DIRECT;
}
// cache the surface flags away in the private RC:
pRcPriv->surfaceFlags = pMCDSurface->surfaceFlags;
// Initialize tracking of this window with a MCDWINDOW
// (via and WNDOBJ on NT) if we are not already tracking the
// window:
pWnd = MCDSrvNewMCDWindow(pMCDSurface, hWnd, pGlobal,
pRcPriv->hDev);
if (pWnd == NULL)
{
MCDSrvLocalFree((HLOCAL)pRcPriv);
return (MCDHANDLE)NULL;
}
pWndPriv = (MCDWINDOWPRIV *)pWnd;
pRcPriv->hWnd = hWnd;
newRcObject = (MCDRCOBJ *)MCDSrvLocalAlloc(0,sizeof(MCDRCOBJ));
if (!newRcObject) {
MCDSrvLocalFree((HLOCAL)pRcPriv);
return (MCDHANDLE)NULL;
}
retVal = MCDEngCreateObject(newRcObject, FreeRCObj, pRcPriv->hDev);
if (retVal) {
newRcObject->pid = MCDEngGetProcessID();
newRcObject->type = MCDHANDLE_RC;
newRcObject->size = sizeof(MCDRCPRIV);
newRcObject->pRcPriv = pRcPriv;
newRcObject->handle = (MCDHANDLE)retVal;
// Add the object to the list in the MCDWINDOW
newRcObject->next = pWndPriv->objectList;
pWndPriv->objectList = newRcObject;
} else {
MCDBG_PRINT("MCDSrvCreateContext: Could not create new handle.");
MCDSrvLocalFree((HLOCAL)pRcPriv);
MCDSrvLocalFree((HLOCAL)newRcObject);
return (MCDHANDLE)NULL;
}
pRcPriv->bValid = TRUE;
pRcPriv->scissorsEnabled = FALSE;
pRcPriv->scissorsRect.left = 0;
pRcPriv->scissorsRect.top = 0;
pRcPriv->scissorsRect.right = 0;
pRcPriv->scissorsRect.bottom = 0;
pRcPriv->MCDRc.createFlags = contextFlags;
pRcPriv->MCDRc.iPixelFormat = iPixelFormat;
pRcPriv->MCDRc.iLayerPlane = iLayer;
if (!(*pGlobal->mcdDriver.pMCDrvCreateContext)(pMCDSurface,
&pRcPriv->MCDRc,
&pMcdRcInfo->mri)) {
DestroyMCDObj((HANDLE)retVal, MCDHANDLE_RC);
return (MCDHANDLE)NULL;
}
// Return window private handle
pMcdRcInfo->dwMcdWindow = (ULONG_PTR)pWndPriv->handle;
// Now valid to call driver for deletion...
pRcPriv->bDrvValid = TRUE;
return (MCDHANDLE)retVal;
}
//****************************************************************************
// FreeTexObj()
//
// Engine callback for freeing the memory used for a texture.
//****************************************************************************
BOOL CALLBACK FreeTexObj(DRIVEROBJ *pDrvObj)
{
MCDTEXOBJ *pTexObj = (MCDTEXOBJ *)pDrvObj->pvObj;
// We should never get called if the driver is missing this entry point,
// but the extra check can't hurt!
//
// pGlobal can be NULL for partially constructed objects. It
// is only NULL prior to calling the driver for creation, so if
// it's NULL there's no reason to call the driver for cleanup.
if (pTexObj->pGlobal != NULL &&
pTexObj->pGlobal->mcdDriver.pMCDrvDeleteTexture != NULL)
{
(*pTexObj->pGlobal->mcdDriver.pMCDrvDeleteTexture)
(&pTexObj->MCDTexture, pDrvObj->dhpdev);
}
MCDSrvLocalFree((HLOCAL)pTexObj);
return TRUE;
}
//****************************************************************************
// MCDSrvCreateTexture()
//
// Creates an MCD texture.
//****************************************************************************
PRIVATE
MCDHANDLE MCDSrvCreateTexture(MCDEXEC *pMCDExec, MCDTEXTUREDATA *pTexData,
VOID *pSurface, ULONG flags)
{
MCDRCPRIV *pRcPriv;
MCDHANDLE hTex;
MCDTEXOBJ *pTexObj;
pRcPriv = pMCDExec->pRcPriv;
if ((!pMCDExec->pGlobal->mcdDriver.pMCDrvDeleteTexture) ||
(!pMCDExec->pGlobal->mcdDriver.pMCDrvCreateTexture)) {
return (MCDHANDLE)NULL;
}
pTexObj = (MCDTEXOBJ *) MCDSrvLocalAlloc(0,sizeof(MCDTEXOBJ));
if (!pTexObj) {
MCDBG_PRINT("MCDCreateTexture: Could not allocate texture object.");
return (MCDHANDLE)NULL;
}
hTex = MCDEngCreateObject(pTexObj, FreeTexObj, pRcPriv->hDev);
if (!hTex) {
MCDBG_PRINT("MCDSrvCreateTexture: Could not create texture object.");
MCDSrvLocalFree((HLOCAL)pTexObj);
return (MCDHANDLE)NULL;
}
// Initialize driver public information for driver call, but not
// the private information. The private information is not filled out
// until after the driver call succeeds so that FreeTexObj knows
// whether to call the driver or not when destroying a texture object.
pTexObj->MCDTexture.pSurface = pSurface;
pTexObj->MCDTexture.pMCDTextureData = pTexData;
pTexObj->MCDTexture.createFlags = flags;
// Call the driver if everything has gone well...
if (!(*pMCDExec->pGlobal->mcdDriver.pMCDrvCreateTexture)
(&pMCDExec->MCDSurface,
&pRcPriv->MCDRc,
&pTexObj->MCDTexture)) {
//MCDBG_PRINT("MCDSrvCreateTexture: Driver could not create texture.");
MCDEngDeleteObject(hTex);
return (MCDHANDLE)NULL;
}
if (!pTexObj->MCDTexture.textureKey) {
MCDBG_PRINT("MCDSrvCreateTexture: Driver returned null key.");
MCDEngDeleteObject(hTex);
return (MCDHANDLE)NULL;
}
pTexObj->pid = MCDEngGetProcessID();
pTexObj->type = MCDHANDLE_TEXTURE;
pTexObj->size = sizeof(MCDTEXOBJ);
pTexObj->pGlobal = pMCDExec->pGlobal;
return (MCDHANDLE)hTex;
}
//****************************************************************************
// FreeMemObj()
//
// Engine callback for freeing memory used by shared-memory handles.
//****************************************************************************
BOOL CALLBACK FreeMemObj(DRIVEROBJ *pDrvObj)
{
MCDMEMOBJ *pMemObj = (MCDMEMOBJ *)pDrvObj->pvObj;
// Free the memory using our engine ONLY if it is the same memory
// we allocated in the first place.
if (pMemObj->pMemBaseInternal)
MCDEngFreeSharedMem(pMemObj->pMemBaseInternal);
// pGlobal can be NULL for partially constructed objects. It
// is only NULL prior to calling the driver for creation, so if
// it's NULL there's no reason to call the driver for cleanup.
if (pMemObj->pGlobal != NULL &&
pMemObj->pGlobal->mcdDriver.pMCDrvDeleteMem != NULL)
{
(*pMemObj->pGlobal->mcdDriver.pMCDrvDeleteMem)
(&pMemObj->MCDMem, pDrvObj->dhpdev);
}
MCDSrvLocalFree((HLOCAL)pMemObj);
return TRUE;
}
//****************************************************************************
// MCDSrvAllocMem()
//
// Creates a handle associated with the specified memory.
//****************************************************************************
PRIVATE
UCHAR * MCDSrvAllocMem(MCDEXEC *pMCDExec, ULONG numBytes,
ULONG flags, MCDHANDLE *phMem)
{
MCDRCPRIV *pRcPriv;
MCDHANDLE hMem;
MCDMEMOBJ *pMemObj;
pRcPriv = pMCDExec->pRcPriv;
*phMem = (MCDHANDLE)FALSE;
pMemObj = (MCDMEMOBJ *) MCDSrvLocalAlloc(0,sizeof(MCDMEMOBJ));
if (!pMemObj) {
MCDBG_PRINT("MCDSrvAllocMem: Could not allocate memory object.");
return (MCDHANDLE)NULL;
}
hMem = MCDEngCreateObject(pMemObj, FreeMemObj, pRcPriv->hDev);
if (!hMem) {
MCDBG_PRINT("MCDSrvAllocMem: Could not create memory object.");
MCDSrvLocalFree((HLOCAL)pMemObj);
return (UCHAR *)NULL;
}
pMemObj->MCDMem.pMemBase = pMemObj->pMemBaseInternal =
MCDEngAllocSharedMem(numBytes);
if (!pMemObj->MCDMem.pMemBase) {
MCDBG_PRINT("MCDSrvAllocMem: Could not allocate memory.");
MCDEngDeleteObject(hMem);
return (UCHAR *)NULL;
}
// Call the driver if everything has gone well, and the driver
// entry points exist...
if ((pMCDExec->pGlobal->mcdDriver.pMCDrvCreateMem) &&
(pMCDExec->pGlobal->mcdDriver.pMCDrvDeleteMem)) {
if (!(*pMCDExec->pGlobal->mcdDriver.pMCDrvCreateMem)
(&pMCDExec->MCDSurface,
&pMemObj->MCDMem)) {
MCDBG_PRINT("MCDSrvAllocMem: "
"Driver not create memory type %x.", flags);
MCDEngDeleteObject(hMem);
return (UCHAR *)NULL;
}
}
// Free the memory allocated with our engine if the driver has substituted
// its own allocation...
if (pMemObj->MCDMem.pMemBase != pMemObj->pMemBaseInternal) {
MCDEngFreeSharedMem(pMemObj->pMemBaseInternal);
pMemObj->pMemBaseInternal = (UCHAR *)NULL;
}
// Set up the private portion of memory object:
pMemObj->pid = MCDEngGetProcessID();
pMemObj->type = MCDHANDLE_MEM;
pMemObj->size = sizeof(MCDMEMOBJ);
pMemObj->pGlobal = pMCDExec->pGlobal;
pMemObj->MCDMem.memSize = numBytes;
pMemObj->MCDMem.createFlags = flags;
*phMem = hMem;
return pMemObj->MCDMem.pMemBase;
}
PRIVATE
ULONG MCDSrvQueryMemStatus(MCDEXEC *pMCDExec, MCDHANDLE hMCDMem)
{
MCDMEMOBJ *pMemObj;
pMemObj = (MCDMEMOBJ *)MCDEngGetPtrFromHandle(hMCDMem, MCDHANDLE_MEM);
if (!pMemObj)
return MCD_MEM_INVALID;
if (pMemObj->lockCount)
return MCD_MEM_BUSY;
else
return MCD_MEM_READY;
}
PRIVATE
BOOL MCDSrvSetScissor(MCDEXEC *pMCDExec, RECTL *pRect, BOOL bEnabled)
{
MCDRCPRIV *pRcPriv;
MCDRCOBJ *pRcObj;
HWND hWnd;
ULONG retVal = FALSE;
pRcPriv = pMCDExec->pRcPriv;
pRcPriv->scissorsEnabled = bEnabled;
pRcPriv->scissorsRect = *pRect;
return TRUE;
}
//****************************************************************************
// DestroyMCDObj()
//
// Deletes the specified object. This can be memory, textures, or rendering
// contexts.
//
//****************************************************************************
PRIVATE
BOOL DestroyMCDObj(MCDHANDLE handle, MCDHANDLETYPE handleType)
{
CHAR *pObject;
pObject = (CHAR *)MCDEngGetPtrFromHandle(handle, handleType);
if (!pObject)
return FALSE;
//!!! Check for PID here...
return (MCDEngDeleteObject(handle) != 0);
}
//****************************************************************************
// DecoupleMCDWindowObj()
//
// Breaks any existing links between an MCDWINDOW and its WNDOBJ
//****************************************************************************
PRIVATE
VOID DecoupleMCDWindow(MCDWINDOWPRIV *pWndPriv)
{
// Clean up any outstanding lock
MCDSrvUnlock(pWndPriv);
// Delete reference in WNDOBJ. WNDOBJ itself will be cleaned
// up through normal window cleanup.
if (pWndPriv->pwo != NULL)
{
if (pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow)
{
(*pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow)
(pWndPriv->pwo, (MCDWINDOW *)pWndPriv, WOC_DELETE);
}
WNDOBJ_vSetConsumer(pWndPriv->pwo, NULL);
pWndPriv->pwo = NULL;
}
}
//****************************************************************************
// DestroyMCDWindowObj()
//
// Destroy the specified MCDWINDOW and any associated handles (such rendering
// contexts).
//****************************************************************************
PRIVATE
VOID DestroyMCDWindowObj(MCDWINDOWOBJ *pmwo)
{
MCDWINDOWPRIV *pWndPriv = &pmwo->MCDWindowPriv;
MCDRCOBJ *nextObject;
DecoupleMCDWindow(pWndPriv);
// Delete all of the rendering contexts associated with the window:
#if _WIN95_
while (pWndPriv->objectList)
{
nextObject = pWndPriv->objectList->next;
MCDEngDeleteObject(pWndPriv->objectList->handle);
pWndPriv->objectList = nextObject;
}
#endif
if (pWndPriv->pAllocatedClipBuffer)
MCDSrvLocalFree(pWndPriv->pAllocatedClipBuffer);
// Free the memory
MCDSrvLocalFree((HLOCAL)pmwo);
}
//****************************************************************************
// GetScissorClip()
//
// Generate a new clip list based on the current list of clip rectanges
// for the window, and the specified scissor rectangle.
//****************************************************************************
PRIVATE
VOID GetScissorClip(MCDWINDOWPRIV *pWndPriv, MCDRCPRIV *pRcPriv)
{
MCDWINDOW *pWnd;
MCDENUMRECTS *pClipUnscissored;
MCDENUMRECTS *pClipScissored;
RECTL *pRectUnscissored;
RECTL *pRectScissored;
RECTL rectScissor;
ULONG numUnscissoredRects;
ULONG numScissoredRects;
pWnd = (MCDWINDOW *)pWndPriv;
if (!pRcPriv || !pRcPriv->scissorsEnabled)
{
// Scissors aren't enabled, so the unscissored and scissored
// clip lists are identical:
pWnd->pClip = pWnd->pClipUnscissored = pWndPriv->pClipUnscissored;
}
else
{
// The scissored list will go in the second half of our clip
// buffer:
pClipUnscissored
= pWndPriv->pClipUnscissored;
pClipScissored
= (MCDENUMRECTS*) ((BYTE*) pClipUnscissored + pWndPriv->sizeClipBuffer / 2);
pWnd->pClip = pWndPriv->pClipScissored = pClipScissored;
pWnd->pClipUnscissored = pClipUnscissored;
// Convert scissor to screen coordinates:
rectScissor.left = pRcPriv->scissorsRect.left + pWndPriv->MCDWindow.clientRect.left;
rectScissor.right = pRcPriv->scissorsRect.right + pWndPriv->MCDWindow.clientRect.left;
rectScissor.top = pRcPriv->scissorsRect.top + pWndPriv->MCDWindow.clientRect.top;
rectScissor.bottom = pRcPriv->scissorsRect.bottom + pWndPriv->MCDWindow.clientRect.top;
pRectUnscissored = &pClipUnscissored->arcl[0];
pRectScissored = &pClipScissored->arcl[0];
numScissoredRects = 0;
for (numUnscissoredRects = pClipUnscissored->c;
numUnscissoredRects != 0;
numUnscissoredRects--, pRectUnscissored++)
{
// Since our clipping rectangles are ordered from top to
// bottom, we can early-out if the tops of the remaining
// rectangles are not in the scissor rectangle
if (rectScissor.bottom <= pRectUnscissored->top)
break;
// Continue without updating new clip list is there is
// no overlap.
if ((rectScissor.left >= pRectUnscissored->right) ||
(rectScissor.top >= pRectUnscissored->bottom) ||
(rectScissor.right <= pRectUnscissored->left))
continue;
// If we reach this point, we must intersect the given rectangle
// with the scissor.
MCDIntersectRect(pRectScissored, pRectUnscissored, &rectScissor);
numScissoredRects++;
pRectScissored++;
}
pClipScissored->c = numScissoredRects;
}
}
//****************************************************************************
// GetClipLists()
//
// Updates the clip list for the specified window. Space is also allocated
// the scissored clip list.
//
//****************************************************************************
PRIVATE
VOID GetClipLists(WNDOBJ *pwo, MCDWINDOWPRIV *pWndPriv)
{
MCDENUMRECTS *pDefault;
ULONG numClipRects;
char *pClipBuffer;
ULONG sizeClipBuffer;
pDefault = (MCDENUMRECTS*) &pWndPriv->defaultClipBuffer[0];
#if 1
if (pwo->coClient.iDComplexity == DC_TRIVIAL)
{
if ((pwo->rclClient.left >= pwo->rclClient.right) ||
(pwo->rclClient.top >= pwo->rclClient.bottom))
{
pDefault->c = 0;
}
else
{
pDefault->c = 1;
pDefault->arcl[0] = pwo->rclClient;
}
}
else if (pwo->coClient.iDComplexity == DC_RECT)
#else
if (pwo->coClient.iDComplexity == DC_RECT)
#endif
{
if (pWndPriv->pAllocatedClipBuffer)
MCDSrvLocalFree(pWndPriv->pAllocatedClipBuffer);
pWndPriv->pAllocatedClipBuffer = NULL;
pWndPriv->pClipUnscissored = pDefault;
pWndPriv->pClipScissored = pDefault;
pWndPriv->sizeClipBuffer = SIZE_DEFAULT_CLIP_BUFFER;
if ((pwo->coClient.rclBounds.left >= pwo->coClient.rclBounds.right) ||
(pwo->coClient.rclBounds.top >= pwo->coClient.rclBounds.bottom))
{
// Full-screen VGA mode is represented by a DC_RECT clip object
// with an empty bounding rectangle. We'll denote it by
// setting the rectangle count to zero:
pDefault->c = 0;
}
else
{
pDefault->c = 1;
pDefault->arcl[0] = pwo->coClient.rclBounds;
}
}
else
{
WNDOBJ_cEnumStart(pwo, CT_RECTANGLES, CD_RIGHTDOWN, 0);
// Note that this is divide-by-2 for the buffer size because we
// need room for two copies of the rectangle list:
if (WNDOBJ_bEnum(pwo, SIZE_DEFAULT_CLIP_BUFFER / 2, (ULONG*) pDefault))
{
// Okay, the list of rectangles won't fit in our default buffer.
// Unfortunately, there is no way to obtain the total count of clip
// rectangles other than by enumerating them all, as cEnumStart
// will occasionally give numbers that are far too large (because
// GDI itself doesn't feel like counting them all).
//
// Note that we can use the full default buffer here for this
// enumeration loop:
numClipRects = pDefault->c;
while (WNDOBJ_bEnum(pwo, SIZE_DEFAULT_CLIP_BUFFER, (ULONG*) pDefault))
numClipRects += pDefault->c;
// Don't forget that we are given a valid output buffer even
// when 'bEnum' returns FALSE:
numClipRects += pDefault->c;
pClipBuffer = pWndPriv->pAllocatedClipBuffer;
sizeClipBuffer = 2 * (numClipRects * sizeof(RECTL) + sizeof(ULONG));
if ((pClipBuffer == NULL) || (sizeClipBuffer > pWndPriv->sizeClipBuffer))
{
// Our allocated buffer is too small; we have to free it and
// allocate a new one. Take the opportunity to add some
// growing room to our allocation:
sizeClipBuffer += 8 * sizeof(RECTL); // Arbitrary growing room
if (pClipBuffer)
MCDSrvLocalFree(pClipBuffer);
pClipBuffer = (char *) MCDSrvLocalAlloc(LMEM_FIXED, sizeClipBuffer);
if (pClipBuffer == NULL)
{
// Oh no: we couldn't allocate enough room for the clip list.
// So pretend we have no visible area at all:
pWndPriv->pAllocatedClipBuffer = NULL;
pWndPriv->pClipUnscissored = pDefault;
pWndPriv->pClipScissored = pDefault;
pWndPriv->sizeClipBuffer = SIZE_DEFAULT_CLIP_BUFFER;
pDefault->c = 0;
return;
}
pWndPriv->pAllocatedClipBuffer = pClipBuffer;
pWndPriv->pClipUnscissored = (MCDENUMRECTS*) pClipBuffer;
pWndPriv->pClipScissored = (MCDENUMRECTS*) pClipBuffer;
pWndPriv->sizeClipBuffer = sizeClipBuffer;
}
// Now actually get all the clip rectangles:
WNDOBJ_cEnumStart(pwo, CT_RECTANGLES, CD_RIGHTDOWN, 0);
WNDOBJ_bEnum(pwo, sizeClipBuffer, (ULONG*) pClipBuffer);
}
else
{
// How nice, there are no more clip rectangles, which meant that
// the entire list fits in our default clip buffer, with room
// for the scissored version of the list:
if (pWndPriv->pAllocatedClipBuffer)
MCDSrvLocalFree(pWndPriv->pAllocatedClipBuffer);
pWndPriv->pAllocatedClipBuffer = NULL;
pWndPriv->pClipUnscissored = pDefault;
pWndPriv->pClipScissored = pDefault;
pWndPriv->sizeClipBuffer = SIZE_DEFAULT_CLIP_BUFFER;
}
}
}
//****************************************************************************
// WndObjChangeProc()
//
// This is the callback function for window-change notification. We update
// our clip list, and also allow the hardware to respond to the client
// and surface deltas, as well as the client message itself.
//****************************************************************************
VOID CALLBACK WndObjChangeProc(WNDOBJ *pwo, FLONG fl)
{
MCDGLOBALINFO *pGlobal;
if (pwo)
{
MCDWINDOWPRIV *pWndPriv = (MCDWINDOWPRIV *)pwo->pvConsumer;
//MCDBG_PRINT("WndObjChangeProc: %s, pWndPriv = 0x%08lx\n",
// fl == WOC_RGN_CLIENT ? "WOC_RGN_CLIENT " :
// fl == WOC_RGN_CLIENT_DELTA ? "WOC_RGN_CLIENT_DELTA " :
// fl == WOC_RGN_SURFACE ? "WOC_RGN_SURFACE " :
// fl == WOC_RGN_SURFACE_DELTA ? "WOC_RGN_SURFACE_DELTA" :
// fl == WOC_DELETE ? "WOC_DELETE " :
// "unknown",
// pWndPriv);
//!!!HACK -- surface region tracking doesn't have an MCDWINDOWPRIV (yet...)
// Client region tracking and deletion requires a valid MCDWINDOWPRIV.
if (((fl == WOC_RGN_CLIENT) || (fl == WOC_RGN_CLIENT_DELTA) ||
(fl == WOC_DELETE)))
{
if (!pWndPriv)
{
return;
}
// Invalidate cache because buffers may have moved
pWndPriv->bBuffersValid = FALSE;
}
switch (fl)
{
case WOC_RGN_CLIENT: // Capture the clip list
GetClipLists(pwo, pWndPriv);
pWndPriv->MCDWindow.clientRect = pwo->rclClient;
pWndPriv->MCDWindow.clipBoundsRect = pwo->coClient.rclBounds;
pWndPriv->bRegionValid = TRUE;
if (pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow != NULL)
{
(*pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow)
(pwo, (MCDWINDOW *)pWndPriv, fl);
}
break;
case WOC_RGN_CLIENT_DELTA:
if (pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow != NULL)
{
(*pWndPriv->pGlobal->mcdDriver.pMCDrvTrackWindow)
(pwo, (MCDWINDOW *)pWndPriv, fl);
}
break;
case WOC_RGN_SURFACE:
case WOC_RGN_SURFACE_DELTA:
//!!!HACK -- use NULL for pWndPriv; we didn't set it, so we can't
//!!! trust it
pGlobal = MCDSrvGetGlobalInfo(pwo->psoOwner);
if (pGlobal != NULL &&
pGlobal->mcdDriver.pMCDrvTrackWindow != NULL)
{
(pGlobal->mcdDriver.pMCDrvTrackWindow)
(pwo, (MCDWINDOW *)NULL, fl);
}
break;
case WOC_DELETE:
//MCDBG_PRINT("WndObjChangeProc: WOC_DELETE.");
// Window is being deleted, so destroy our private window data,
// and set the consumer field of the WNDOBJ to NULL:
if (pWndPriv)
{
DecoupleMCDWindow(pWndPriv);
}
break;
default:
break;
}
}
}
//****************************************************************************
// FreeMCDWindowObj()
//
// Callback to clean up MCDWINDOWs
//****************************************************************************
BOOL CALLBACK FreeMCDWindowObj(DRIVEROBJ *pDrvObj)
{
MCDWINDOWOBJ *pmwo = (MCDWINDOWOBJ *)pDrvObj->pvObj;
DestroyMCDWindowObj(pmwo);
return TRUE;
}
//****************************************************************************
// NewMCDWindowObj()
//
// Creates and initializes a new MCDWINDOW and initializes tracking of the
// associated window through callback notification.
//****************************************************************************
PRIVATE
MCDWINDOWOBJ *NewMCDWindowObj(MCDSURFACE *pMCDSurface,
MCDGLOBALINFO *pGlobal,
HDEV hdev)
{
MCDWINDOW *pWnd;
MCDWINDOWPRIV *pWndPriv;
MCDWINDOWOBJ *pmwo;
MCDENUMRECTS *pDefault;
MCDHANDLE handle;
pmwo = (MCDWINDOWOBJ *)MCDSrvLocalAlloc(0, sizeof(MCDWINDOWOBJ));
if (!pmwo)
{
return NULL;
}
// Create a driver object for this window
handle = MCDEngCreateObject(pmwo, FreeMCDWindowObj, hdev);
if (handle == 0)
{
MCDBG_PRINT("NewMCDWindow: Could not create new handle.");
MCDSrvLocalFree((UCHAR *)pmwo);
return NULL;
}
pWndPriv = &pmwo->MCDWindowPriv;
pWnd = &pWndPriv->MCDWindow;
// Initialize the structure members:
pmwo->type = MCDHANDLE_WINDOW;
pWndPriv->objectList = NULL;
pWndPriv->handle = handle;
pWndPriv->bBuffersValid = FALSE;
pWndPriv->pGlobal = pGlobal;
// Initialize the clipping:
pDefault = (MCDENUMRECTS*) &pWndPriv->defaultClipBuffer[0];
pDefault->c = 0;
pWndPriv->pAllocatedClipBuffer = NULL;
pWndPriv->pClipUnscissored = pDefault;
pWndPriv->sizeClipBuffer = SIZE_DEFAULT_CLIP_BUFFER;
pWndPriv->sizeClipBuffer = SIZE_DEFAULT_CLIP_BUFFER;
pWnd->pClip = pDefault;
return pmwo;
}
//****************************************************************************
// MCDSrvNewWndObj()
//
// Creates a new WNDOBJ for window tracking.
//****************************************************************************
PRIVATE
WNDOBJ *MCDSrvNewWndObj(MCDSURFACE *pMCDSurface, HWND hWnd, WNDOBJ *pwoIn,
MCDGLOBALINFO *pGlobal, HDEV hdev)
{
MCDWINDOW *pWnd;
MCDWINDOWPRIV *pWndPriv;
WNDOBJ *pwo;
MCDWINDOWOBJ *pmwo;
pmwo = NewMCDWindowObj(pMCDSurface, pGlobal, hdev);
if (!pmwo)
{
return NULL;
}
pWndPriv = &pmwo->MCDWindowPriv;
pWnd = &pWndPriv->MCDWindow;
pWndPriv->hWnd = hWnd;
// Handle the case where a WNDOBJ already exists but hasn't been
// initialized for MCD usage in addition to the new creation case.
if (pwoIn == NULL)
{
pwo = MCDEngCreateWndObj(pMCDSurface, hWnd, WndObjChangeProc);
if (!pwo || ((LONG_PTR)pwo == -1))
{
MCDBG_PRINT("NewMCDWindowTrack: could not create WNDOBJ.");
MCDEngDeleteObject(pmwo->MCDWindowPriv.handle);
return NULL;
}
}
else
{
pwo = pwoIn;
}
// Set the consumer field in the WNDOBJ:
WNDOBJ_vSetConsumer(pwo, (PVOID)pWndPriv);
// Point back to the WNDOBJ
pWndPriv->pwo = pwo;
return pwo;
}
//****************************************************************************
// MCDSrvNewMcdWindow()
//
// Creates a new MCDWINDOW for window tracking.
//****************************************************************************
PRIVATE
MCDWINDOW *MCDSrvNewMCDWindow(MCDSURFACE *pMCDSurface, HWND hWnd,
MCDGLOBALINFO *pGlobal, HDEV hdev)
{
MCDWINDOW *pWnd;
MCDWINDOWPRIV *pWndPriv;
MCDWINDOWOBJ *pmwo;
// Initialize tracking of this window with a MCDWINDOW
// (via a WNDOBJ on NT) if we are not already tracking the
// window:
if (pMCDSurface->surfaceFlags & MCDSURFACE_HWND)
{
WNDOBJ *pwo;
pwo = MCDEngGetWndObj(pMCDSurface);
// Sometimes a WNDOBJ has been used and the MCD state destroyed so
// the consumer is NULL but the WNDOBJ exists. In that case
// we need to create a new MCDWINDOW for it.
if (!pwo || !pwo->pvConsumer)
{
pwo = MCDSrvNewWndObj(pMCDSurface, hWnd, pwo, pGlobal, hdev);
if (!pwo)
{
MCDBG_PRINT("MCDSrvNewMcdWindow: "
"Creation of window object failed.");
return NULL;
}
((MCDWINDOW *)pwo->pvConsumer)->pvUser = NULL;
}
pWnd = (MCDWINDOW *)pwo->pvConsumer;
}
else
{
#if MCD_VER_MAJOR >= 2 || (MCD_VER_MAJOR == 1 && MCD_VER_MINOR >= 0x10)
MCDENUMRECTS *pDefault;
PDD_SURFACE_GLOBAL pGbl;
pmwo = NewMCDWindowObj(pMCDSurface, pGlobal, hdev);
if (!pmwo)
{
MCDBG_PRINT("MCDSrvNewMcdWindow: "
"Creation of window object failed.");
return NULL;
}
pWnd = &pmwo->MCDWindowPriv.MCDWindow;
// Real clipping info
pWndPriv = (MCDWINDOWPRIV *)pWnd;
pGbl = ((PDD_SURFACE_LOCAL)pMCDSurface->frontId)->lpGbl;
pWndPriv->MCDWindow.clientRect.left = pGbl->xHint;
pWndPriv->MCDWindow.clientRect.top = pGbl->yHint;
pWndPriv->MCDWindow.clientRect.right = pGbl->xHint+pGbl->wWidth;
pWndPriv->MCDWindow.clientRect.bottom = pGbl->yHint+pGbl->wHeight;
pWndPriv->MCDWindow.clipBoundsRect = pWndPriv->MCDWindow.clientRect;
pWndPriv->bRegionValid = TRUE;
pDefault = (MCDENUMRECTS*) &pWndPriv->defaultClipBuffer[0];
pDefault->c = 1;
pDefault->arcl[0] = pWndPriv->MCDWindow.clientRect;
#else
return NULL;
#endif // 1.1
}
pMCDSurface->pWnd = pWnd;
pWndPriv = (MCDWINDOWPRIV *)pWnd;
pWndPriv->hWnd = hWnd;
return pWnd;
}
////////////////////////////////////////////////////////////////////////////
//
//
// MCD locking support.
//
//
////////////////////////////////////////////////////////////////////////////
//****************************************************************************
// ULONG MCDSrvLock(MCDWINDOWPRIV *pWndPriv);
//
// Lock the MCD driver for the specified window. Fails if lock is already
// held by another window.
//****************************************************************************
ULONG MCDSrvLock(MCDWINDOWPRIV *pWndPriv)
{
ULONG ulRet = MCD_LOCK_BUSY;
MCDLOCKINFO *pLockInfo;
pLockInfo = &pWndPriv->pGlobal->lockInfo;
if (!pLockInfo->bLocked || pLockInfo->pWndPrivOwner == pWndPriv)
{
pLockInfo->bLocked = TRUE;
pLockInfo->pWndPrivOwner = pWndPriv;
ulRet = MCD_LOCK_TAKEN;
}
return ulRet;
}
//****************************************************************************
// VOID MCDSrvUnlock(MCDWINDOWPRIV *pWndPriv);
//
// Releases the MCD driver lock if held by the specified window.
//****************************************************************************
VOID MCDSrvUnlock(MCDWINDOWPRIV *pWndPriv)
{
MCDLOCKINFO *pLockInfo;
//!!!dbug -- could add a lock count, but not really needed right now
pLockInfo = &pWndPriv->pGlobal->lockInfo;
if (pLockInfo->pWndPrivOwner == pWndPriv)
{
pLockInfo->bLocked = FALSE;
pLockInfo->pWndPrivOwner = 0;
}
}
//****************************************************************************
//
// Per-driver-instance information list handling.
//
//****************************************************************************
#define GLOBAL_INFO_BLOCK 8
ENGSAFESEMAPHORE ssemGlobalInfo;
MCDGLOBALINFO *pGlobalInfo;
int iGlobalInfoAllocated = 0;
int iGlobalInfoUsed = 0;
BOOL MCDSrvInitGlobalInfo(void)
{
return EngInitializeSafeSemaphore(&ssemGlobalInfo);
}
MCDGLOBALINFO *MCDSrvAddGlobalInfo(SURFOBJ *pso)
{
MCDGLOBALINFO *pGlobal;
EngAcquireSemaphore(ssemGlobalInfo.hsem);
// Ensure space for new entry
if (iGlobalInfoUsed >= iGlobalInfoAllocated)
{
pGlobal = (MCDGLOBALINFO *)
MCDSrvLocalAlloc(0, (iGlobalInfoAllocated+GLOBAL_INFO_BLOCK)*
sizeof(MCDGLOBALINFO));
if (pGlobal != NULL)
{
// Copy old data if necessary
if (iGlobalInfoAllocated > 0)
{
memcpy(pGlobal, pGlobalInfo, iGlobalInfoAllocated*
sizeof(MCDGLOBALINFO));
MCDSrvLocalFree((UCHAR *)pGlobalInfo);
}
// Set new information
pGlobalInfo = pGlobal;
iGlobalInfoAllocated += GLOBAL_INFO_BLOCK;
iGlobalInfoUsed++;
// pGlobal is guaranteed zero-filled because of MCDSrvLocalAlloc's
// behavior, so just fill in the pso.
pGlobal += iGlobalInfoAllocated;
pGlobal->pso = pso;
}
else
{
// Falls out and returns NULL
}
}
else
{
MCDGLOBALINFO *pGlobal;
int i;
pGlobal = pGlobalInfo;
for (i = 0; i < iGlobalInfoAllocated; i++)
{
if (pGlobal->pso == pso)
{
// This should never happen.
MCDBG_PRINT("MCDSrvAddGlobalInfo: duplicate pso");
pGlobal = NULL;
break;
}
if (pGlobal->pso == NULL)
{
iGlobalInfoUsed++;
// Initialize pso for use.
memset(pGlobal, 0, sizeof(*pGlobal));
pGlobal->pso = pso;
break;
}
pGlobal++;
}
}
EngReleaseSemaphore(ssemGlobalInfo.hsem);
return pGlobal;
}
MCDGLOBALINFO *MCDSrvGetGlobalInfo(SURFOBJ *pso)
{
MCDGLOBALINFO *pGlobal;
int i;
// For backwards compatibility we handle one instance
// using global data. If the incoming pso matches the
// pso in the static data then just return it.
// It is important to check this before entering the semaphore
// since the semaphore is not created if only legacy drivers
// have attached.
if (pso == gStaticGlobalInfo.pso)
{
return &gStaticGlobalInfo;
}
// Technically we shouldn't have to check this, since MCD processing
// should not occur unless:
// 1. It's an old style driver and hits the static case above.
// 2. It's a new style driver and the semaphore has been created.
// Unfortunately not all drivers are well-behaved, plus there's a
// potentialy legacy driver bug where drivers don't check for init
// failure and try to call MCD anyway.
if (ssemGlobalInfo.hsem == NULL)
{
MCDBG_PRINT("MCDSrvGetGlobalInfo: no hsem");
return NULL;
}
EngAcquireSemaphore(ssemGlobalInfo.hsem);
pGlobal = pGlobalInfo;
for (i = 0; i < iGlobalInfoAllocated; i++)
{
if (pGlobal->pso == pso)
{
break;
}
pGlobal++;
}
// Technically we shouldn't have to check this, because if
// we made it into the non-static code path a matching pso should
// be registered. As with the above check, though, it's better
// safe than sorry.
if (i >= iGlobalInfoAllocated)
{
MCDBG_PRINT("MCDSrvGetGlobalInfo: no pso match");
pGlobal = NULL;
}
EngReleaseSemaphore(ssemGlobalInfo.hsem);
return pGlobal;
}
void MCDSrvUninitGlobalInfo(void)
{
EngDeleteSafeSemaphore(&ssemGlobalInfo);
}
void WINAPI MCDEngUninit(SURFOBJ *pso)
{
MCDGLOBALINFO *pGlobal;
int i;
// This should never happen.
if (ssemGlobalInfo.hsem == NULL)
{
MCDBG_PRINT("MCDEngUninit: no hsem");
return;
}
EngAcquireSemaphore(ssemGlobalInfo.hsem);
pGlobal = pGlobalInfo;
for (i = 0; i < iGlobalInfoAllocated; i++)
{
if (pGlobal->pso == pso)
{
break;
}
pGlobal++;
}
if (i >= iGlobalInfoAllocated)
{
// This should never happen.
MCDBG_PRINT("MCDEngUninit: No pso match");
}
else if (--iGlobalInfoUsed == 0)
{
MCDSrvLocalFree((UCHAR *)pGlobalInfo);
iGlobalInfoAllocated = 0;
}
else
{
pGlobal->pso = NULL;
}
EngReleaseSemaphore(ssemGlobalInfo.hsem);
MCDSrvUninitGlobalInfo();
}
//****************************************************************************
// BOOL HalInitSystem(ULONG a, ULONG b)
//
// This is a dummy function needed to use the standard makefile.def since
// we're pretending we're an NT HAL.
//****************************************************************************
BOOL HalInitSystem(ULONG a, ULONG b)
{
return TRUE;
}
//******************************Public*Routine******************************
//
// BOOL WINAPI DllEntry(HINSTANCE hDLLInst, DWORD fdwReason,
// LPVOID lpvReserved);
//
// DLL entry point invoked for each process and thread that attaches to
// this DLL.
//
//**************************************************************************
BOOL WINAPI DllEntry(HINSTANCE hDLLInst, DWORD fdwReason, LPVOID lpvReserved)
{
switch (fdwReason)
{
case DLL_PROCESS_ATTACH:
// The DLL is being loaded for the first time by a given process.
// Perform per-process initialization here. If the initialization
// is successful, return TRUE; if unsuccessful, return FALSE.
break;
case DLL_PROCESS_DETACH:
// The DLL is being unloaded by a given process. Do any
// per-process clean up here, such as undoing what was done in
// DLL_PROCESS_ATTACH. The return value is ignored.
break;
case DLL_THREAD_ATTACH:
// A thread is being created in a process that has already loaded
// this DLL. Perform any per-thread initialization here. The
// return value is ignored.
break;
case DLL_THREAD_DETACH:
// A thread is exiting cleanly in a process that has already
// loaded this DLL. Perform any per-thread clean up here. The
// return value is ignored.
break;
}
return TRUE;
}