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windows-nt/Source/XPSP1/NT/drivers/video/ms/w32/disp/ddraw.c

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2020-09-26 03:20:57 -05:00
/******************************Module*Header*******************************\
* Module Name: ddraw.c
*
* Implements all the DirectDraw components for the driver.
*
* Copyright (c) 1995-1996 Microsoft Corporation
\**************************************************************************/
#include "precomp.h"
// NT is kind enough to pre-calculate the 2-d surface offset as a 'hint' so
// that we don't have to do the following, which would be 6 DIVs per blt:
//
// y += (offset / pitch)
// x += (offset % pitch) / bytes_per_pixel
#define convertToGlobalCord(x, y, surf) \
{ \
y += surf->yHint; \
x += surf->xHint; \
}
/////////////////////////////////////////////////////////////////
// DirectDraw stuff
#define VBLANK_IS_ACTIVE(pjPorts)\
((CP_IN_BYTE(pjPorts, STATUS_1) & 0x08) ? TRUE : FALSE) // !!! 0x3da
#define DISPLAY_IS_ACTIVE(pjPorts)\
((CP_IN_BYTE(pjPorts, STATUS_1) & 0x01) ? TRUE : FALSE)
#define ENTER(s) DISPDBG((10, "Entering "#s));
#define EXIT(s) DISPDBG((10, "Exiting "#s" line(%d)", __LINE__));
/******************************Public*Routine******************************\
* VOID vGetDisplayDuration
*
* Get the length, in EngQueryPerformanceCounter() ticks, of a refresh cycle.
*
* If we could trust the miniport to return back and accurate value for
* the refresh rate, we could use that. Unfortunately, our miniport doesn't
* ensure that it's an accurate value.
*
\**************************************************************************/
#define NUM_VBLANKS_TO_MEASURE 1
#define NUM_MEASUREMENTS_TO_TAKE 10
#define NUM_MEASUREMENTS_TO_DISCARD 3
#if (NUM_MEASUREMENTS_TO_TAKE - NUM_MEASUREMENTS_TO_DISCARD) < 2
#error ***************************************
#error *** You discarded too many measurements
#error ***************************************
#endif
VOID vGetDisplayDuration(PDEV* ppdev)
{
BYTE* pjBase;
BYTE* pjPorts;
LONG i;
LONG j;
LONGLONG li;
LONGLONG liMin;
LONGLONG aliMeasurement[NUM_MEASUREMENTS_TO_TAKE + 1];
pjBase = ppdev->pjBase;
pjPorts = ppdev->pjPorts;
memset(&ppdev->flipRecord, 0, sizeof(ppdev->flipRecord));
// Warm up EngQUeryPerformanceCounter to make sure it's in the working
// set:
EngQueryPerformanceCounter(&li);
// Unfortunately, since NT is a proper multitasking system, we can't
// just disable interrupts to take an accurate reading. We also can't
// do anything so goofy as dynamically change our thread's priority to
// real-time.
//
// So we just do a bunch of short measurements and take the minimum.
//
// It would be 'okay' if we got a result that's longer than the actual
// VBlank cycle time -- nothing bad would happen except that the app
// would run a little slower. We don't want to get a result that's
// shorter than the actual VBlank cycle time -- that could cause us
// to start drawing over a frame before the Flip has occured.
while (VBLANK_IS_ACTIVE(pjPorts))
;
while (!(VBLANK_IS_ACTIVE(pjPorts)))
;
for (i = 0; i < NUM_MEASUREMENTS_TO_TAKE; i++)
{
// We're at the start of the VBlank active cycle!
EngQueryPerformanceCounter(&aliMeasurement[i]);
// Okay, so life in a multi-tasking environment isn't all that
// simple. What if we had taken a context switch just before
// the above EngQueryPerformanceCounter call, and now were half
// way through the VBlank inactive cycle? Then we would measure
// only half a VBlank cycle, which is obviously bad. The worst
// thing we can do is get a time shorter than the actual VBlank
// cycle time.
//
// So we solve this by making sure we're in the VBlank active
// time before and after we query the time. If it's not, we'll
// sync up to the next VBlank (it's okay to measure this period --
// it will be guaranteed to be longer than the VBlank cycle and
// will likely be thrown out when we select the minimum sample).
// There's a chance that we'll take a context switch and return
// just before the end of the active VBlank time -- meaning that
// the actual measured time would be less than the true amount --
// but since the VBlank is active less than 1% of the time, this
// means that we would have a maximum of 1% error approximately
// 1% of the times we take a context switch. An acceptable risk.
//
// This next line will cause us wait if we're no longer in the
// VBlank active cycle as we should be at this point:
while (!(VBLANK_IS_ACTIVE(pjPorts)))
;
for (j = 0; j < NUM_VBLANKS_TO_MEASURE; j++)
{
while (VBLANK_IS_ACTIVE(pjPorts))
;
while (!(VBLANK_IS_ACTIVE(pjPorts)))
;
}
}
EngQueryPerformanceCounter(&aliMeasurement[NUM_MEASUREMENTS_TO_TAKE]);
// Use the minimum:
liMin = aliMeasurement[1+NUM_MEASUREMENTS_TO_DISCARD] -
aliMeasurement[0+NUM_MEASUREMENTS_TO_DISCARD];
DISPDBG((1, "Refresh count: %li - %li", 1, (ULONG) liMin));
for (i = 2+NUM_MEASUREMENTS_TO_DISCARD; i <= NUM_MEASUREMENTS_TO_TAKE; i++)
{
li = aliMeasurement[i] - aliMeasurement[i - 1];
DISPDBG((1, " %li - %li", i - NUM_MEASUREMENTS_TO_DISCARD, (ULONG) li));
if (li < liMin)
liMin = li;
}
// Round the result:
ppdev->flipRecord.liFlipDuration
= (DWORD) (liMin + (NUM_VBLANKS_TO_MEASURE / 2)) / NUM_VBLANKS_TO_MEASURE;
DISPDBG((1, "Frequency %li.%03li Hz",
(ULONG) (EngQueryPerformanceFrequency(&li),
li / ppdev->flipRecord.liFlipDuration),
(ULONG) (EngQueryPerformanceFrequency(&li),
((li * 1000) / ppdev->flipRecord.liFlipDuration) % 1000)));
ppdev->flipRecord.liFlipTime = aliMeasurement[NUM_MEASUREMENTS_TO_TAKE];
ppdev->flipRecord.bFlipFlag = FALSE;
ppdev->flipRecord.fpFlipFrom = 0;
}
/******************************Public*Routine******************************\
* HRESULT vUpdateFlipStatus
*
* Checks and sees if the most recent flip has occurred.
*
\**************************************************************************/
HRESULT vUpdateFlipStatus(
PDEV* ppdev,
FLATPTR fpVidMem)
{
BYTE* pjBase;
BYTE* pjPorts;
LONGLONG liTime;
ENTER(vUpdateFlipStatus);
pjBase = ppdev->pjBase;
pjPorts = ppdev->pjPorts;
if ((ppdev->flipRecord.bFlipFlag) &&
((fpVidMem == 0) || (fpVidMem == ppdev->flipRecord.fpFlipFrom)))
{
if (VBLANK_IS_ACTIVE(pjPorts))
{
if (ppdev->flipRecord.bWasEverInDisplay)
{
ppdev->flipRecord.bHaveEverCrossedVBlank = TRUE;
}
}
else if (DISPLAY_IS_ACTIVE(pjPorts))
{
if( ppdev->flipRecord.bHaveEverCrossedVBlank )
{
ppdev->flipRecord.bFlipFlag = FALSE;
EXIT(vUpdateFlipStatus);
return(DD_OK);
}
ppdev->flipRecord.bWasEverInDisplay = TRUE;
}
EngQueryPerformanceCounter(&liTime);
if (liTime - ppdev->flipRecord.liFlipTime
<= ppdev->flipRecord.liFlipDuration)
{
EXIT(vUpdateFlipStatus);
return(DDERR_WASSTILLDRAWING);
}
ppdev->flipRecord.bFlipFlag = FALSE;
}
EXIT(vUpdateFlipStatus);
return(DD_OK);
}
/******************************Public*Routine******************************\
* DWORD DdBlt
*
\**************************************************************************/
DWORD DdBlt(
PDD_BLTDATA lpBlt)
{
PDD_SURFACE_GLOBAL srcSurf;
PDD_SURFACE_LOCAL destSurfx;
PDD_SURFACE_GLOBAL destSurf;
PDEV* ppdev;
BYTE* pjBase;
HRESULT ddrval;
FLATPTR destOffset;
DWORD destPitch;
DWORD destX;
DWORD destY;
DWORD direction;
DWORD dwFlags;
DWORD height;
BYTE rop;
FLATPTR sourceOffset;
DWORD srcPitch;
DWORD srcX;
DWORD srcY;
DWORD width;
LONG lDelta;
LONG cBpp;
ULONG ulBltAdjust = 0;
ENTER(DdBlt);
ppdev = (PDEV*) lpBlt->lpDD->dhpdev;
pjBase = ppdev->pjBase;
lDelta = ppdev->lDelta;
cBpp = ppdev->cBpp;
destSurfx = lpBlt->lpDDDestSurface;
destSurf = destSurfx->lpGbl;
// Is a flip in progress?
ddrval = vUpdateFlipStatus(ppdev, destSurf->fpVidMem);
if (ddrval != DD_OK)
{
lpBlt->ddRVal = ddrval;
EXIT(DdBlt);
return(DDHAL_DRIVER_HANDLED);
}
dwFlags = lpBlt->dwFlags;
if (dwFlags & DDBLT_ASYNC)
{
// If async, then only work if we won't have to wait on the
// accelerator to start the command.
// !!! is this next line correct?
if (IS_BUSY(ppdev, pjBase))
{
lpBlt->ddRVal = DDERR_WASSTILLDRAWING;
EXIT(DdBlt);
return(DDHAL_DRIVER_HANDLED);
}
}
// Copy src/dest rects:
destX = lpBlt->rDest.left;
destY = lpBlt->rDest.top;
width = lpBlt->rDest.right - lpBlt->rDest.left;
height = lpBlt->rDest.bottom - lpBlt->rDest.top;
destPitch = destSurf->lPitch;
destOffset = destSurf->fpVidMem;
if (dwFlags & DDBLT_COLORFILL)
{
lpBlt->ddRVal = DD_OK;
convertToGlobalCord(destX, destY, destSurf);
// Solid fill here
{
WAIT_FOR_EMPTY_ACL_QUEUE(ppdev, pjBase);
CP_FG_ROP(ppdev, pjBase, R3_PATCOPY);
CP_DST_Y_OFFSET(ppdev, pjBase, (lDelta - 1));
CP_PAT_ADDR(ppdev, pjBase, ppdev->ulSolidColorOffset);
CP_XCNT(ppdev, pjBase, (width * cBpp - 1));
CP_YCNT(ppdev, pjBase, (height - 1));
WAIT_FOR_IDLE_ACL(ppdev, pjBase);
*(PULONG)(ppdev->pjScreen + ppdev->ulSolidColorOffset) =
COLOR_REPLICATE(ppdev, lpBlt->bltFX.dwFillColor);
if (cBpp == 3)
{
CP_PEL_DEPTH(ppdev, pjBase, HW_PEL_DEPTH_24BPP);
CP_PAT_WRAP(ppdev, pjBase, SOLID_COLOR_PATTERN_WRAP_24BPP);
CP_PAT_Y_OFFSET(ppdev, pjBase, (SOLID_COLOR_PATTERN_OFFSET_24BPP - 1));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX)));
WAIT_FOR_EMPTY_ACL_QUEUE(ppdev, pjBase);
CP_PEL_DEPTH(ppdev, pjBase, HW_PEL_DEPTH_8BPP);
}
else
{
CP_PAT_WRAP(ppdev, pjBase, SOLID_COLOR_PATTERN_WRAP);
CP_PAT_Y_OFFSET(ppdev, pjBase, (SOLID_COLOR_PATTERN_OFFSET - 1));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX)));
}
}
EXIT(DdBlt);
return(DDHAL_DRIVER_HANDLED);
}
// We specified with Our ddCaps.dwCaps that we handle a limited number
// of commands, and by this point in our routine we've handled everything
// except DDBLT_ROP. DirectDraw and GDI shouldn't pass us anything
// else; we'll assert on debug builds to prove this:
ASSERTDD((dwFlags & DDBLT_ROP) && (lpBlt->lpDDSrcSurface),
"Expected dwFlags commands of only DDBLT_ASYNC and DDBLT_COLORFILL");
// Get offset, width, and height for source:
srcSurf = lpBlt->lpDDSrcSurface->lpGbl;
srcX = lpBlt->rSrc.left;
srcY = lpBlt->rSrc.top;
srcPitch = srcSurf->lPitch;
sourceOffset = srcSurf->fpVidMem;
// Assume we can do the blt top-to-bottom, left-to-right:
if ((destSurf == srcSurf) && (srcX + width > destX) &&
(srcY + height > destY) && (destX + width > srcX) &&
(destY + height > srcY) &&
(((srcY == destY) && (destX > srcX) )
|| ((srcY != destY) && (destY > srcY))))
{
// Okay, we have to do the blt bottom-to-top, right-to-left:
ulBltAdjust = 1;
srcX = lpBlt->rSrc.right;
srcY = lpBlt->rSrc.bottom - 1;
destX = lpBlt->rDest.right;
destY = lpBlt->rDest.bottom - 1;
}
// NT only ever gives us SRCCOPY rops, so don't even both checking
// for anything else.
convertToGlobalCord(srcX, srcY, srcSurf);
convertToGlobalCord(destX, destY, destSurf);
// Bitmap Blt
{
WAIT_FOR_EMPTY_ACL_QUEUE(ppdev, pjBase);
if (ulBltAdjust) {
CP_XY_DIR(ppdev, pjBase, (BOTTOM_TO_TOP | RIGHT_TO_LEFT));
}
if (dwFlags & DDBLT_KEYSRCOVERRIDE)
{
// Color keyed Transparency
CP_FG_ROP(ppdev, pjBase, R3_SRCCOPY);
CP_SRC_WRAP(ppdev, pjBase, NO_PATTERN_WRAP);
CP_SRC_Y_OFFSET(ppdev, pjBase, (lDelta - 1));
CP_DST_Y_OFFSET(ppdev, pjBase, (lDelta - 1));
if (ulBltAdjust) {
CP_PAT_ADDR(ppdev, pjBase, ppdev->ulSolidColorOffset + cBpp - 1);
} else {
CP_PAT_ADDR(ppdev, pjBase, ppdev->ulSolidColorOffset);
}
CP_ROUTING_CTRL(ppdev, pjBase, 0x13); // Generate CompareMap
CP_XCNT(ppdev, pjBase, ((cBpp * width) - 1));
CP_YCNT(ppdev, pjBase, (height - 1));
CP_SRC_ADDR(ppdev, pjBase, ((srcY * lDelta) + (cBpp * srcX) - ulBltAdjust));
WAIT_FOR_IDLE_ACL(ppdev, pjBase);
*(PULONG)(ppdev->pjScreen + ppdev->ulSolidColorOffset) =
COLOR_REPLICATE(ppdev, lpBlt->bltFX.ddckSrcColorkey.dwColorSpaceLowValue);
if (cBpp == 3)
{
CP_PEL_DEPTH(ppdev, pjBase, HW_PEL_DEPTH_24BPP);
CP_PAT_WRAP(ppdev, pjBase, SOLID_COLOR_PATTERN_WRAP_24BPP);
CP_PAT_Y_OFFSET(ppdev, pjBase, (SOLID_COLOR_PATTERN_OFFSET_24BPP - 1));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX) - ulBltAdjust));
}
else if (cBpp == 2)
{
CP_PEL_DEPTH(ppdev, pjBase, HW_PEL_DEPTH_16BPP);
CP_PAT_WRAP(ppdev, pjBase, SOLID_COLOR_PATTERN_WRAP);
CP_PAT_Y_OFFSET(ppdev, pjBase, (SOLID_COLOR_PATTERN_OFFSET - 1));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX) - ulBltAdjust));
}
else
{
CP_PAT_WRAP(ppdev, pjBase, SOLID_COLOR_PATTERN_WRAP);
CP_PAT_Y_OFFSET(ppdev, pjBase, (SOLID_COLOR_PATTERN_OFFSET - 1));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX) - ulBltAdjust));
}
WAIT_FOR_EMPTY_ACL_QUEUE(ppdev, pjBase);
CP_PEL_DEPTH(ppdev, pjBase, HW_PEL_DEPTH_8BPP);
CP_ROUTING_CTRL(ppdev, pjBase, 0x33);
}
else
{
// Opaque
CP_FG_ROP(ppdev, pjBase, R3_SRCCOPY);
CP_SRC_WRAP(ppdev, pjBase, NO_PATTERN_WRAP);
CP_SRC_Y_OFFSET(ppdev, pjBase, (lDelta - 1));
CP_DST_Y_OFFSET(ppdev, pjBase, (lDelta - 1));
CP_XCNT(ppdev, pjBase, ((cBpp * width) - 1));
CP_YCNT(ppdev, pjBase, (height - 1));
CP_SRC_ADDR(ppdev, pjBase, ((srcY * lDelta) + (cBpp * srcX) - ulBltAdjust));
CP_DST_ADDR(ppdev, pjBase, ((destY * lDelta) + (cBpp * destX) - ulBltAdjust));
}
if (ulBltAdjust) {
WAIT_FOR_EMPTY_ACL_QUEUE(ppdev, pjBase);
CP_XY_DIR(ppdev, pjBase, 0);
}
}
lpBlt->ddRVal = DD_OK;
EXIT(DdBlt);
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdFlip
*
\**************************************************************************/
DWORD DdFlip(
PDD_FLIPDATA lpFlip)
{
PDEV* ppdev;
BYTE* pjBase;
BYTE* pjPorts;
HRESULT ddrval;
ULONG ulMemoryOffset;
ULONG ulLowOffset;
ULONG ulMiddleOffset;
ULONG ulHighOffset;
ENTER(DdFLip);
ppdev = (PDEV*) lpFlip->lpDD->dhpdev;
pjBase = ppdev->pjBase;
pjPorts = ppdev->pjPorts;
// Is the current flip still in progress?
//
// Don't want a flip to work until after the last flip is done,
// so we ask for the general flip status and ignore the vmem.
ddrval = vUpdateFlipStatus(ppdev, 0);
if ((ddrval != DD_OK) || (IS_BUSY(ppdev, pjBase)))
{
lpFlip->ddRVal = DDERR_WASSTILLDRAWING;
EXIT(DdFLip);
return(DDHAL_DRIVER_HANDLED);
}
// Do the flip:
ulMemoryOffset = (ULONG)(lpFlip->lpSurfTarg->lpGbl->fpVidMem) >> 2;
ulLowOffset = 0x0d | ((ulMemoryOffset & 0x0000ff) << 8);
ulMiddleOffset = 0x0c | ((ulMemoryOffset & 0x00ff00));
ulHighOffset = 0x33 | ((ulMemoryOffset & 0x0f0000) >> 8);
// Make sure that the border/blanking period isn't active; wait if
// it is. We could return DDERR_WASSTILLDRAWING in this case, but
// that will increase the odds that we can't flip the next time:
while (!(DISPLAY_IS_ACTIVE(pjPorts)))
;
CP_OUT_WORD(pjPorts, CRTC_INDEX, ulLowOffset);
CP_OUT_WORD(pjPorts, CRTC_INDEX, ulMiddleOffset);
CP_OUT_WORD(pjPorts, CRTC_INDEX, ulHighOffset);
// Remember where and when we were when we did the flip:
EngQueryPerformanceCounter(&ppdev->flipRecord.liFlipTime);
ppdev->flipRecord.bFlipFlag = TRUE;
ppdev->flipRecord.bHaveEverCrossedVBlank = FALSE;
ppdev->flipRecord.bWasEverInDisplay = FALSE;
ppdev->flipRecord.fpFlipFrom = lpFlip->lpSurfCurr->lpGbl->fpVidMem;
lpFlip->ddRVal = DD_OK;
EXIT(DdFLip);
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdLock
*
\**************************************************************************/
DWORD DdLock(
PDD_LOCKDATA lpLock)
{
PDEV* ppdev;
BYTE* pjBase;
HRESULT ddrval;
ENTER(DdLock);
ppdev = (PDEV*) lpLock->lpDD->dhpdev;
pjBase = ppdev->pjBase;
// Check to see if any pending physical flip has occurred.
// Don't allow a lock if a blt is in progress:
ddrval = vUpdateFlipStatus(ppdev, lpLock->lpDDSurface->lpGbl->fpVidMem);
if (ddrval != DD_OK)
{
lpLock->ddRVal = DDERR_WASSTILLDRAWING;
EXIT(DdLock);
return(DDHAL_DRIVER_HANDLED);
}
if ((ppdev->dwLinearCnt == 0) && (IS_BUSY(ppdev, pjBase)))
{
lpLock->ddRVal = DDERR_WASSTILLDRAWING;
return(DDHAL_DRIVER_HANDLED);
}
// Reference count it, just for the heck of it:
ppdev->dwLinearCnt++;
EXIT(DdLock);
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdUnlock
*
\**************************************************************************/
DWORD DdUnlock(
PDD_UNLOCKDATA lpUnlock)
{
PDEV* ppdev;
ENTER(DdUnlock);
ppdev = (PDEV*) lpUnlock->lpDD->dhpdev;
ppdev->dwLinearCnt--;
EXIT(DdUnlock);
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdGetBltStatus
*
* Doesn't currently really care what surface is specified, just checks
* and goes.
*
\**************************************************************************/
DWORD DdGetBltStatus(
PDD_GETBLTSTATUSDATA lpGetBltStatus)
{
PDEV* ppdev;
BYTE* pjBase;
HRESULT ddRVal;
ENTER(DdGetBltStatus);
ppdev = (PDEV*) lpGetBltStatus->lpDD->dhpdev;
pjBase = ppdev->pjBase;
ddRVal = DD_OK;
if (lpGetBltStatus->dwFlags == DDGBS_CANBLT)
{
// DDGBS_CANBLT case: can we add a blt?
ddRVal = vUpdateFlipStatus(ppdev,
lpGetBltStatus->lpDDSurface->lpGbl->fpVidMem);
if (ddRVal == DD_OK)
{
// There was no flip going on, so is there room in the FIFO
// to add a blt?
// !!! is this next line correct?
if (IS_BUSY(ppdev, pjBase))
{
ddRVal = DDERR_WASSTILLDRAWING;
}
}
}
else
{
// DDGBS_ISBLTDONE case: is a blt in progress?
if (IS_BUSY(ppdev, pjBase))
{
ddRVal = DDERR_WASSTILLDRAWING;
}
}
lpGetBltStatus->ddRVal = ddRVal;
EXIT(DdGetBltStatus);
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdMapMemory
*
* This is a new DDI call specific to Windows NT that is used to map
* or unmap all the application modifiable portions of the frame buffer
* into the specified process's address space.
*
\**************************************************************************/
DWORD DdMapMemory(
PDD_MAPMEMORYDATA lpMapMemory)
{
PDEV* ppdev;
VIDEO_SHARE_MEMORY ShareMemory;
VIDEO_SHARE_MEMORY_INFORMATION ShareMemoryInformation;
DWORD ReturnedDataLength;
ENTER(DdMapMemory);
ppdev = (PDEV*) lpMapMemory->lpDD->dhpdev;
if (lpMapMemory->bMap)
{
ShareMemory.ProcessHandle = lpMapMemory->hProcess;
// 'RequestedVirtualAddress' isn't actually used for the SHARE IOCTL:
ShareMemory.RequestedVirtualAddress = 0;
// We map in starting at the top of the frame buffer:
ShareMemory.ViewOffset = 0;
// We map down to the end of the frame buffer.
//
// Note: There is a 64k granularity on the mapping (meaning that
// we have to round up to 64k).
//
// Note: If there is any portion of the frame buffer that must
// not be modified by an application, that portion of memory
// MUST NOT be mapped in by this call. This would include
// any data that, if modified by a malicious application,
// would cause the driver to crash. This could include, for
// example, any DSP code that is kept in off-screen memory.
ShareMemory.ViewSize
= ROUND_UP_TO_64K(ppdev->cyMemory * ppdev->lDelta);
if (EngDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_SHARE_VIDEO_MEMORY,
&ShareMemory,
sizeof(VIDEO_SHARE_MEMORY),
&ShareMemoryInformation,
sizeof(VIDEO_SHARE_MEMORY_INFORMATION),
&ReturnedDataLength))
{
DISPDBG((0, "Failed IOCTL_VIDEO_SHARE_MEMORY"));
lpMapMemory->ddRVal = DDERR_GENERIC;
EXIT(DdMapMemory);
return(DDHAL_DRIVER_HANDLED);
}
lpMapMemory->fpProcess = (ULONG_PTR) ShareMemoryInformation.VirtualAddress;
}
else
{
ShareMemory.ProcessHandle = lpMapMemory->hProcess;
ShareMemory.ViewOffset = 0;
ShareMemory.ViewSize = 0;
ShareMemory.RequestedVirtualAddress = (VOID*) lpMapMemory->fpProcess;
if (EngDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_UNSHARE_VIDEO_MEMORY,
&ShareMemory,
sizeof(VIDEO_SHARE_MEMORY),
NULL,
0,
&ReturnedDataLength))
{
RIP("Failed IOCTL_VIDEO_UNSHARE_MEMORY");
}
}
lpMapMemory->ddRVal = DD_OK;
EXIT(DdMapMemory);
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdGetFlipStatus
*
* If the display has gone through one refresh cycle since the flip
* occurred, we return DD_OK. If it has not gone through one refresh
* cycle we return DDERR_WASSTILLDRAWING to indicate that this surface
* is still busy "drawing" the flipped page. We also return
* DDERR_WASSTILLDRAWING if the bltter is busy and the caller wanted
* to know if they could flip yet.
*
\**************************************************************************/
DWORD DdGetFlipStatus(
PDD_GETFLIPSTATUSDATA lpGetFlipStatus)
{
PDEV* ppdev;
BYTE* pjBase;
ENTER(DdGetFlipStatus);
ppdev = (PDEV*) lpGetFlipStatus->lpDD->dhpdev;
pjBase = ppdev->pjBase;
// We don't want a flip to work until after the last flip is done,
// so we ask for the general flip status and ignore the vmem:
lpGetFlipStatus->ddRVal = vUpdateFlipStatus(ppdev, 0);
// Check if the bltter is busy if someone wants to know if they can
// flip:
if (lpGetFlipStatus->dwFlags == DDGFS_CANFLIP)
{
if ((lpGetFlipStatus->ddRVal == DD_OK) && (IS_BUSY(ppdev, pjBase)))
{
lpGetFlipStatus->ddRVal = DDERR_WASSTILLDRAWING;
}
}
EXIT(DdGetFlipStatus);
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdWaitForVerticalBlank
*
\**************************************************************************/
DWORD DdWaitForVerticalBlank(
PDD_WAITFORVERTICALBLANKDATA lpWaitForVerticalBlank)
{
PDEV* ppdev;
BYTE* pjBase;
BYTE* pjPorts;
ENTER(DdWaitForVerticalBlank);
ppdev = (PDEV*) lpWaitForVerticalBlank->lpDD->dhpdev;
pjBase = ppdev->pjBase;
pjPorts = ppdev->pjPorts;
lpWaitForVerticalBlank->ddRVal = DD_OK;
switch (lpWaitForVerticalBlank->dwFlags)
{
case DDWAITVB_I_TESTVB:
// If TESTVB, it's just a request for the current vertical blank
// status:
if (VBLANK_IS_ACTIVE(pjPorts))
lpWaitForVerticalBlank->bIsInVB = TRUE;
else
lpWaitForVerticalBlank->bIsInVB = FALSE;
EXIT(DdWaitForVerticalBlank);
return(DDHAL_DRIVER_HANDLED);
case DDWAITVB_BLOCKBEGIN:
// If BLOCKBEGIN is requested, we wait until the vertical blank
// is over, and then wait for the display period to end:
while (VBLANK_IS_ACTIVE(pjPorts))
;
while (!(VBLANK_IS_ACTIVE(pjPorts)))
;
EXIT(DdWaitForVerticalBlank);
return(DDHAL_DRIVER_HANDLED);
case DDWAITVB_BLOCKEND:
// If BLOCKEND is requested, we wait for the vblank interval to end:
while (!(VBLANK_IS_ACTIVE(pjPorts)))
;
while (VBLANK_IS_ACTIVE(pjPorts))
;
EXIT(DdWaitForVerticalBlank);
return(DDHAL_DRIVER_HANDLED);
}
EXIT(DdWaitForVerticalBlank);
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* BOOL DrvGetDirectDrawInfo
*
* Will be called before DrvEnableDirectDraw is called.
*
\**************************************************************************/
BOOL DrvGetDirectDrawInfo(
DHPDEV dhpdev,
DD_HALINFO* pHalInfo,
DWORD* pdwNumHeaps,
VIDEOMEMORY* pvmList, // Will be NULL on first call
DWORD* pdwNumFourCC,
DWORD* pdwFourCC) // Will be NULL on first call
{
BOOL bCanFlip;
PDEV* ppdev;
LONGLONG li;
OH* poh;
ENTER(DrvGetDirectDrawInfo);
ppdev = (PDEV*) dhpdev;
// We may not support DirectDraw on this card:
if (!(ppdev->flStatus & STAT_DIRECTDRAW))
{
EXIT(DrvGetDirectDrawInfo);
return(FALSE);
}
pHalInfo->dwSize = sizeof(*pHalInfo);
// Current primary surface attributes. Since HalInfo is zero-initialized
// by GDI, we only have to fill in the fields which should be non-zero:
pHalInfo->vmiData.pvPrimary = ppdev->pjScreen;
pHalInfo->vmiData.dwDisplayWidth = ppdev->cxScreen;
pHalInfo->vmiData.dwDisplayHeight = ppdev->cyScreen;
pHalInfo->vmiData.lDisplayPitch = ppdev->lDelta;
pHalInfo->vmiData.ddpfDisplay.dwSize = sizeof(DDPIXELFORMAT);
pHalInfo->vmiData.ddpfDisplay.dwFlags = DDPF_RGB;
// !!! What about 15 vs. 16 Bpp below?
pHalInfo->vmiData.ddpfDisplay.dwRGBBitCount = ppdev->cBpp * 8;
if (ppdev->iBitmapFormat == BMF_8BPP)
{
pHalInfo->vmiData.ddpfDisplay.dwFlags |= DDPF_PALETTEINDEXED8;
}
// These masks will be zero at 8bpp:
pHalInfo->vmiData.ddpfDisplay.dwRBitMask = ppdev->flRed;
pHalInfo->vmiData.ddpfDisplay.dwGBitMask = ppdev->flGreen;
pHalInfo->vmiData.ddpfDisplay.dwBBitMask = ppdev->flBlue;
if (ppdev->iBitmapFormat == BMF_32BPP)
{
pHalInfo->vmiData.ddpfDisplay.dwRGBAlphaBitMask
= ~(ppdev->flRed | ppdev->flGreen | ppdev->flBlue);
}
else
{
pHalInfo->vmiData.ddpfDisplay.dwRGBAlphaBitMask = 0;
}
// Set up the pointer to the first available video memory after
// the primary surface:
bCanFlip = FALSE;
*pdwNumHeaps = 0;
// Free up as much off-screen memory as possible:
bMoveAllDfbsFromOffscreenToDibs(ppdev);
// Now simply reserve the biggest chunk for use by DirectDraw:
poh = ppdev->pohDirectDraw;
if (poh == NULL)
{
poh = pohAllocate(ppdev,
NULL,
ppdev->heap.cxMax,
ppdev->heap.cyMax,
FLOH_MAKE_PERMANENT);
ppdev->pohDirectDraw = poh;
}
if (poh != NULL)
{
*pdwNumHeaps = 1;
// Fill in the list of off-screen rectangles if we've been asked
// to do so:
if (pvmList != NULL)
{
DISPDBG((1, "DirectDraw gets %li x %li surface at (%li, %li)",
poh->cx, poh->cy, poh->x, poh->y));
pvmList->dwFlags = VIDMEM_ISRECTANGULAR;
pvmList->fpStart = (poh->y * ppdev->lDelta)
+ (poh->x * ppdev->cBpp);
pvmList->dwWidth = poh->cx * ppdev->cBpp;
pvmList->dwHeight = poh->cy;
pvmList->ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN;
if ((DWORD) ppdev->cyScreen <= pvmList->dwHeight)
{
bCanFlip = TRUE;
}
}
}
// Capabilities supported:
pHalInfo->ddCaps.dwFXCaps = 0;
pHalInfo->ddCaps.dwCaps = DDCAPS_BLT
| DDCAPS_BLTCOLORFILL
| DDCAPS_COLORKEY;
pHalInfo->ddCaps.dwCKeyCaps = DDCKEYCAPS_SRCBLT;
pHalInfo->ddCaps.ddsCaps.dwCaps = DDSCAPS_OFFSCREENPLAIN
| DDSCAPS_PRIMARYSURFACE;
if (bCanFlip)
{
pHalInfo->ddCaps.ddsCaps.dwCaps |= DDSCAPS_FLIP;
}
// Required alignments of the scan lines for each kind of memory:
pHalInfo->vmiData.dwOffscreenAlign = 8 * ppdev->cBpp;
// FourCCs supported:
*pdwNumFourCC = 0;
EXIT(DrvGetDirectDrawInfo);
return(TRUE);
}
/******************************Public*Routine******************************\
* BOOL DrvEnableDirectDraw
*
\**************************************************************************/
BOOL DrvEnableDirectDraw(
DHPDEV dhpdev,
DD_CALLBACKS* pCallBacks,
DD_SURFACECALLBACKS* pSurfaceCallBacks,
DD_PALETTECALLBACKS* pPaletteCallBacks)
{
PDEV* ppdev;
ENTER(DrvEnableDirectDraw);
ppdev = (PDEV*) dhpdev;
pCallBacks->WaitForVerticalBlank = DdWaitForVerticalBlank;
pCallBacks->MapMemory = DdMapMemory;
pCallBacks->dwFlags = DDHAL_CB32_WAITFORVERTICALBLANK
| DDHAL_CB32_MAPMEMORY;
pSurfaceCallBacks->Blt = DdBlt;
pSurfaceCallBacks->Flip = DdFlip;
pSurfaceCallBacks->Lock = DdLock;
pSurfaceCallBacks->Unlock = DdUnlock;
pSurfaceCallBacks->GetBltStatus = DdGetBltStatus;
pSurfaceCallBacks->GetFlipStatus = DdGetFlipStatus;
pSurfaceCallBacks->dwFlags = DDHAL_SURFCB32_BLT
| DDHAL_SURFCB32_FLIP
| DDHAL_SURFCB32_LOCK
| DDHAL_SURFCB32_UNLOCK
| DDHAL_SURFCB32_GETBLTSTATUS
| DDHAL_SURFCB32_GETFLIPSTATUS;
// Note that we don't call 'vGetDisplayDuration' here, for a couple of
// reasons:
//
// o Because the system is already running, it would be disconcerting
// to pause the graphics for a good portion of a second just to read
// the refresh rate;
// o More importantly, we may not be in graphics mode right now.
//
// For both reasons, we always measure the refresh rate when we switch
// to a new mode.
EXIT(DrvEnableDirectDraw);
return(TRUE);
}
/******************************Public*Routine******************************\
* VOID DrvDisableDirectDraw
*
\**************************************************************************/
VOID DrvDisableDirectDraw(
DHPDEV dhpdev)
{
PDEV* ppdev;
ENTER(DrvDisableDirectDraw);
ppdev = (PDEV*) dhpdev;
// DirectDraw is done with the display, so we can go back to using
// all of off-screen memory ourselves:
pohFree(ppdev, ppdev->pohDirectDraw);
ppdev->pohDirectDraw = NULL;
EXIT(DrvDisableDirectDraw);
}
/******************************Public*Routine******************************\
* BOOL bAssertModeDirectDraw
*
\**************************************************************************/
VOID vAssertModeDirectDraw(
PDEV* ppdev,
BOOL bEnabled)
{
}
/******************************Public*Routine******************************\
* BOOL bEnableDirectDraw
*
* This function is called when the mode is first initialized, right after
* the miniport does the mode-set.
*
\**************************************************************************/
BOOL bEnableDirectDraw(
PDEV* ppdev)
{
ENTER(bEnableDirectDraw);
// We're not going to bother to support accelerated DirectDraw on
// the pre-ET6000 chips, because they don't have linear frame
// buffers.
if (ppdev->ulChipID == ET6000)
{
// Accurately measure the refresh rate for later:
vGetDisplayDuration(ppdev);
// DirectDraw is all set to be used on this card:
ppdev->flStatus |= STAT_DIRECTDRAW;
}
EXIT(bEnableDirectDraw);
return(TRUE);
}
/******************************Public*Routine******************************\
* VOID vDisableDirectDraw
*
\**************************************************************************/
VOID vDisableDirectDraw(
PDEV* ppdev)
{
}
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