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windows-nt/Source/XPSP1/NT/drivers/video/ms/s3/disp/ddraw.c

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2020-09-26 03:20:57 -05:00
/******************************Module*Header*******************************\
*
* **************************
* * DirectDraw SAMPLE CODE *
* **************************
*
* Module Name: ddraw.c
*
* Implements all the DirectDraw components for the driver.
*
* Copyright (c) 1995-1998 Microsoft Corporation
\**************************************************************************/
#include "precomp.h"
// Defines we'll use in the surface's 'dwReserved1' field:
#define DD_RESERVED_DIFFERENTPIXELFORMAT 0x0001
// Worst-case possible number of FIFO entries we'll have to wait for in
// DdBlt for any operation:
#define DDBLT_FIFO_COUNT 9
// 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; \
}
/******************************Public*Routine******************************\
* VOID vFixMissingPixels
*
* Trio64V+ work-around.
*
* On 1024x768x8 and 800x600x8 modes, switching from K2 to stream processor
* results in 1 character clock pixels on the right handed side of the screen
* missing. This problem can be worked-around by adjusting CR2 register.
*
\**************************************************************************/
VOID vFixMissingPixels(
PDEV* ppdev)
{
BYTE* pjIoBase;
BYTE jVerticalRetraceEnd;
ASSERTDD(ppdev->flCaps & CAPS_STREAMS_CAPABLE, "Must be streams capable");
pjIoBase = ppdev->pjIoBase;
// Unlock CRTC control registers:
OUTP(pjIoBase, CRTC_INDEX, 0x11);
jVerticalRetraceEnd = INP(pjIoBase, CRTC_DATA);
OUTP(pjIoBase, CRTC_DATA, jVerticalRetraceEnd & 0x7f);
// Add one character clock:
OUTP(pjIoBase, CRTC_INDEX, 0x2);
ppdev->jSavedCR2 = INP(pjIoBase, CRTC_DATA);
OUTP(pjIoBase, CRTC_DATA, ppdev->jSavedCR2 + 1);
// Lock CRTC control registers again:
OUTP(pjIoBase, CRTC_INDEX, 0x11);
OUTP(pjIoBase, CRTC_DATA, jVerticalRetraceEnd | 0x80);
}
/******************************Public*Routine******************************\
* VOID vUnfixMissingPixels
*
* Trio64V+ work-around.
*
\**************************************************************************/
VOID vUnfixMissingPixels(
PDEV* ppdev)
{
BYTE* pjIoBase;
BYTE jVerticalRetraceEnd;
pjIoBase = ppdev->pjIoBase;
// Unlock CRTC control registers:
OUTP(pjIoBase, CRTC_INDEX, 0x11);
jVerticalRetraceEnd = INP(pjIoBase, CRTC_DATA);
OUTP(pjIoBase, CRTC_DATA, jVerticalRetraceEnd & 0x7f);
// Restore original register value:
OUTP(pjIoBase, CRTC_INDEX, 0x2);
OUTP(pjIoBase, CRTC_DATA, ppdev->jSavedCR2);
// Lock CRTC control registers again:
OUTP(pjIoBase, CRTC_INDEX, 0x11);
OUTP(pjIoBase, CRTC_DATA, jVerticalRetraceEnd | 0x80);
}
/******************************Public*Routine******************************\
* VOID vStreamsDelay()
*
* This tries to work around a hardware timing bug. Supposedly, consecutive
* writes to the streams processor in fast CPUs such as P120 and P133's
* have problems. I haven't seen this problem, but this work-around exists
* in the Windows 95 driver, and at this point don't want to chance not
* having it. Note that writes to the streams processor are not performance
* critical, so this is not a performance hit.
*
\**************************************************************************/
VOID vStreamsDelay()
{
volatile LONG i;
for (i = 32; i != 0; i--)
;
}
/******************************Public*Routine******************************\
* VOID vTurnOnStreamsProcessorMode
*
\**************************************************************************/
VOID vTurnOnStreamsProcessorMode(
PDEV* ppdev)
{
BYTE* pjMmBase;
BYTE* pjIoBase;
BYTE jStreamsProcessorModeSelect;
DWORD dwPFormat;
ASSERTDD(ppdev->flCaps & CAPS_STREAMS_CAPABLE, "Must be streams capable");
ACQUIRE_CRTC_CRITICAL_SECTION(ppdev);
pjMmBase = ppdev->pjMmBase;
pjIoBase = ppdev->pjIoBase;
NW_GP_WAIT(ppdev, pjMmBase);
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
// Full streams processor operation:
OUTP(pjIoBase, CRTC_INDEX, 0x67);
jStreamsProcessorModeSelect = INP(pjIoBase, CRTC_DATA);
OUTP(pjIoBase, CRTC_DATA, jStreamsProcessorModeSelect | 0x0c);
if (ppdev->iBitmapFormat == BMF_8BPP)
{
vFixMissingPixels(ppdev);
}
switch(ppdev->iBitmapFormat)
{
case BMF_8BPP:
dwPFormat = P_RGB8;
break;
case BMF_16BPP:
if (IS_RGB15_R(ppdev->flRed))
dwPFormat = P_RGB15;
else
dwPFormat = P_RGB16;
break;
case BMF_32BPP:
dwPFormat = P_RGB32;
break;
default:
RIP("Unexpected bitmap format");
}
WRITE_STREAM_D(pjMmBase, P_CONTROL, dwPFormat );
WRITE_STREAM_D(pjMmBase, FIFO_CONTROL, ((0xcL << FifoAlloc_Shift)|
(4L << P_FifoThresh_Shift) |
(4L << S_FifoThresh_Shift)));
WRITE_STREAM_D(pjMmBase, P_0, 0);
WRITE_STREAM_D(pjMmBase, P_STRIDE, ppdev->lDelta);
WRITE_STREAM_D(pjMmBase, P_XY, 0x010001L);
WRITE_STREAM_D(pjMmBase, P_WH, WH(ppdev->cxScreen, ppdev->cyScreen));
WRITE_STREAM_D(pjMmBase, S_WH, WH(10, 2));
WRITE_STREAM_D(pjMmBase, CKEY_LOW, ppdev->ulColorKey |
CompareBits0t7 |
KeyFromCompare);
WRITE_STREAM_D(pjMmBase, CKEY_HI, ppdev->ulColorKey);
WRITE_STREAM_D(pjMmBase, BLEND_CONTROL, POnS);
WRITE_STREAM_D(pjMmBase, OPAQUE_CONTROL, 0);
WRITE_STREAM_D(pjMmBase, FIFO_CONTROL, ppdev->ulFifoValue);
RELEASE_CRTC_CRITICAL_SECTION(ppdev);
}
/******************************Public*Routine******************************\
* VOID vTurnOffStreamsProcessorMode
*
\**************************************************************************/
VOID vTurnOffStreamsProcessorMode(
PDEV* ppdev)
{
BYTE* pjMmBase;
BYTE* pjIoBase;
BYTE jStreamsProcessorModeSelect;
ACQUIRE_CRTC_CRITICAL_SECTION(ppdev);
pjMmBase = ppdev->pjMmBase;
pjIoBase = ppdev->pjIoBase;
NW_GP_WAIT(ppdev, pjMmBase);
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
WRITE_STREAM_D(pjMmBase, FIFO_CONTROL, 0x3000L);
OUTP(pjIoBase, CRTC_INDEX, 0x67);
jStreamsProcessorModeSelect = INP(pjIoBase, CRTC_DATA);
OUTP(pjIoBase, CRTC_DATA, jStreamsProcessorModeSelect & ~0x0C);
if (ppdev->iBitmapFormat == BMF_8BPP)
{
vUnfixMissingPixels(ppdev);
}
RELEASE_CRTC_CRITICAL_SECTION(ppdev);
}
/******************************Public*Routine******************************\
* DWORD dwGetPaletteEntry
*
\**************************************************************************/
DWORD dwGetPaletteEntry(
PDEV* ppdev,
DWORD iIndex)
{
BYTE* pjIoBase;
DWORD dwRed;
DWORD dwGreen;
DWORD dwBlue;
pjIoBase = ppdev->pjIoBase;
OUTP(pjIoBase, 0x3c7, iIndex);
dwRed = INP(pjIoBase, 0x3c9) << 2;
dwGreen = INP(pjIoBase, 0x3c9) << 2;
dwBlue = INP(pjIoBase, 0x3c9) << 2;
return((dwRed << 16) | (dwGreen << 8) | (dwBlue));
}
/******************************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 8
VOID vGetDisplayDuration(
PDEV* ppdev)
{
BYTE* pjIoBase;
LONG i;
LONG j;
LONGLONG li;
LONGLONG liFrequency;
LONGLONG liMin;
LONGLONG aliMeasurement[NUM_MEASUREMENTS_TO_TAKE + 1];
pjIoBase = ppdev->pjIoBase;
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.
//
// Skip a couple of vertical blanks to allow the hardware to settle
// down after the mode change, to make our readings accurate:
for (i = 2; i != 0; i--)
{
while (VBLANK_IS_ACTIVE(pjIoBase))
;
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
}
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(pjIoBase)))
;
for (j = 0; j < NUM_VBLANKS_TO_MEASURE; j++)
{
while (VBLANK_IS_ACTIVE(pjIoBase))
;
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
}
}
EngQueryPerformanceCounter(&aliMeasurement[NUM_MEASUREMENTS_TO_TAKE]);
// Use the minimum:
liMin = aliMeasurement[1] - aliMeasurement[0];
DISPDBG((1, "Refresh count: %li - %li", 1, (ULONG) liMin));
for (i = 2; i <= NUM_MEASUREMENTS_TO_TAKE; i++)
{
li = aliMeasurement[i] - aliMeasurement[i - 1];
DISPDBG((1, " %li - %li", i, (ULONG) li));
if (li < liMin)
liMin = li;
}
// Round the result:
ppdev->flipRecord.liFlipDuration
= (DWORD) (liMin + (NUM_VBLANKS_TO_MEASURE / 2)) / NUM_VBLANKS_TO_MEASURE;
ppdev->flipRecord.bFlipFlag = FALSE;
ppdev->flipRecord.fpFlipFrom = 0;
// We need the refresh rate in Hz to query the S3 miniport about the
// streams parameters:
EngQueryPerformanceFrequency(&liFrequency);
ppdev->ulRefreshRate
= (ULONG) ((liFrequency + (ppdev->flipRecord.liFlipDuration / 2))
/ ppdev->flipRecord.liFlipDuration);
DISPDBG((1, "Frequency: %li Hz", ppdev->ulRefreshRate));
}
/******************************Public*Routine******************************\
* HRESULT ddrvalUpdateFlipStatus
*
* Checks and sees if the most recent flip has occurred.
*
* Unfortunately, the hardware has no ability to tell us whether a vertical
* retrace has occured since the flip command was given other than by
* sampling the vertical-blank-active and display-active status bits.
*
\**************************************************************************/
HRESULT ddrvalUpdateFlipStatus(
PDEV* ppdev,
FLATPTR fpVidMem)
{
BYTE* pjIoBase;
LONGLONG liTime;
pjIoBase = ppdev->pjIoBase;
if ((ppdev->flipRecord.bFlipFlag) &&
((fpVidMem == (FLATPTR) -1) ||
(fpVidMem == ppdev->flipRecord.fpFlipFrom)))
{
if (VBLANK_IS_ACTIVE(pjIoBase))
{
if (ppdev->flipRecord.bWasEverInDisplay)
{
ppdev->flipRecord.bHaveEverCrossedVBlank = TRUE;
}
}
else if (DISPLAY_IS_ACTIVE(pjIoBase))
{
if (ppdev->flipRecord.bHaveEverCrossedVBlank)
{
ppdev->flipRecord.bFlipFlag = FALSE;
return(DD_OK);
}
ppdev->flipRecord.bWasEverInDisplay = TRUE;
}
// It's pretty unlikely that we'll happen to sample the vertical-
// blank-active at the first vertical blank after the flip command
// has been given. So to provide better results, we also check the
// time elapsed since the flip. If it's more than the duration of
// one entire refresh of the display, then we know for sure it has
// happened:
EngQueryPerformanceCounter(&liTime);
if (liTime - ppdev->flipRecord.liFlipTime
<= ppdev->flipRecord.liFlipDuration)
{
return(DDERR_WASSTILLDRAWING);
}
ppdev->flipRecord.bFlipFlag = FALSE;
}
return(DD_OK);
}
/******************************Public*Routine******************************\
* DWORD DdBlt
*
\**************************************************************************/
DWORD DdBlt(
PDD_BLTDATA lpBlt)
{
PDD_SURFACE_GLOBAL srcSurf;
PDD_SURFACE_LOCAL dstSurfx;
PDD_SURFACE_GLOBAL dstSurf;
PDEV* ppdev;
BYTE* pjMmBase;
HRESULT ddrval;
DWORD dstX;
DWORD dstY;
DWORD dwFlags;
DWORD dstWidth;
DWORD dstHeight;
DWORD srcWidth;
DWORD srcHeight;
DWORD dwError;
LONG dstPitch;
LONG srcPitch;
DWORD srcX;
DWORD srcY;
ULONG ulBltCmd;
DWORD dwVEctrl;
DWORD dwVEdda;
DWORD dwVEcrop;
DWORD dwVEdstAddr;
DWORD dwVEsrcAddr;
DWORD dwDstByteCount;
DWORD dwSrcByteCount;
DWORD dwSrcBytes;
DWORD dwCropSkip;
LONG i;
FLATPTR fp;
ppdev = (PDEV*) lpBlt->lpDD->dhpdev;
pjMmBase = ppdev->pjMmBase;
dstSurfx = lpBlt->lpDDDestSurface;
dstSurf = dstSurfx->lpGbl;
// Is a flip in progress?
ddrval = ddrvalUpdateFlipStatus(ppdev, dstSurf->fpVidMem);
if (ddrval != DD_OK)
{
lpBlt->ddRVal = ddrval;
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.
//
// The FIFO wait should account for the worst-case possible
// blt that we would do:
if (MM_FIFO_BUSY(ppdev, pjMmBase, DDBLT_FIFO_COUNT))
{
lpBlt->ddRVal = DDERR_WASSTILLDRAWING;
return(DDHAL_DRIVER_HANDLED);
}
}
// Copy src/dst rects:
dstX = lpBlt->rDest.left;
dstY = lpBlt->rDest.top;
dstWidth = lpBlt->rDest.right - lpBlt->rDest.left;
dstHeight = lpBlt->rDest.bottom - lpBlt->rDest.top;
if (dwFlags & DDBLT_COLORFILL)
{
// The S3 can't easily do colour fills for off-screen surfaces that
// are a different pixel format than that of the primary display:
if (dstSurf->dwReserved1 & DD_RESERVED_DIFFERENTPIXELFORMAT)
{
DISPDBG((0, "Can't do colorfill to odd pixel format"));
return(DDHAL_DRIVER_NOTHANDLED);
}
else
{
convertToGlobalCord(dstX, dstY, dstSurf);
NW_FIFO_WAIT(ppdev, pjMmBase, 6);
NW_PIX_CNTL(ppdev, pjMmBase, ALL_ONES);
NW_ALT_MIX(ppdev, pjMmBase, FOREGROUND_COLOR | OVERPAINT, 0);
NW_FRGD_COLOR(ppdev, pjMmBase, lpBlt->bltFX.dwFillColor);
NW_ABS_CURXY_FAST(ppdev, pjMmBase, dstX, dstY);
NW_ALT_PCNT(ppdev, pjMmBase, dstWidth - 1, dstHeight - 1);
NW_ALT_CMD(ppdev, pjMmBase, RECTANGLE_FILL | DRAWING_DIR_TBLRXM |
DRAW | DIR_TYPE_XY |
LAST_PIXEL_ON | MULTIPLE_PIXELS |
WRITE);
lpBlt->ddRVal = DD_OK;
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, dstWidth, and dstHeight for source:
srcSurf = lpBlt->lpDDSrcSurface->lpGbl;
srcX = lpBlt->rSrc.left;
srcY = lpBlt->rSrc.top;
srcWidth = lpBlt->rSrc.right - lpBlt->rSrc.left;
srcHeight = lpBlt->rSrc.bottom - lpBlt->rSrc.top;
// If a stretch or a funky pixel format blt are involved, we'll have to
// defer to the overlay or pixel formatter routines:
if ((srcWidth == dstWidth) &&
(srcHeight == dstHeight) &&
!(srcSurf->dwReserved1 & DD_RESERVED_DIFFERENTPIXELFORMAT) &&
!(dstSurf->dwReserved1 & DD_RESERVED_DIFFERENTPIXELFORMAT))
{
// Assume we can do the blt top-to-bottom, left-to-right:
ulBltCmd = BITBLT | DRAW | DIR_TYPE_XY | WRITE | DRAWING_DIR_TBLRXM;
if ((dstSurf == srcSurf) && (srcX + dstWidth > dstX) &&
(srcY + dstHeight > dstY) && (dstX + dstWidth > srcX) &&
(dstY + dstHeight > srcY) &&
(((srcY == dstY) && (dstX > srcX) )
|| ((srcY != dstY) && (dstY > srcY))))
{
// Okay, we have to do the blt bottom-to-top, right-to-left:
ulBltCmd = BITBLT | DRAW | DIR_TYPE_XY | WRITE | DRAWING_DIR_BTRLXM;
srcX = lpBlt->rSrc.right - 1;
srcY = lpBlt->rSrc.bottom - 1;
dstX = lpBlt->rDest.right - 1;
dstY = 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(dstX, dstY, dstSurf);
if (dwFlags & DDBLT_KEYSRCOVERRIDE)
{
NW_FIFO_WAIT(ppdev, pjMmBase, 9);
NW_MULT_MISC_READ_SEL(ppdev, pjMmBase, ppdev->ulMiscState
| MULT_MISC_COLOR_COMPARE, 0);
NW_COLOR_CMP(ppdev, pjMmBase,
lpBlt->bltFX.ddckSrcColorkey.dwColorSpaceLowValue);
NW_ALT_MIX(ppdev, pjMmBase, SRC_DISPLAY_MEMORY | OVERPAINT, 0);
NW_PIX_CNTL(ppdev, pjMmBase, ALL_ONES);
NW_ABS_CURXY_FAST(ppdev, pjMmBase, srcX, srcY);
NW_ABS_DESTXY_FAST(ppdev, pjMmBase, dstX, dstY);
NW_ALT_PCNT(ppdev, pjMmBase, dstWidth - 1, dstHeight - 1);
NW_ALT_CMD(ppdev, pjMmBase, ulBltCmd);
NW_MULT_MISC_READ_SEL(ppdev, pjMmBase, ppdev->ulMiscState, 0);
}
else
{
NW_FIFO_WAIT(ppdev, pjMmBase, 6);
NW_ALT_MIX(ppdev, pjMmBase, SRC_DISPLAY_MEMORY | OVERPAINT, 0);
NW_PIX_CNTL(ppdev, pjMmBase, ALL_ONES);
NW_ABS_CURXY_FAST(ppdev, pjMmBase, srcX, srcY);
NW_ABS_DESTXY_FAST(ppdev, pjMmBase, dstX, dstY);
NW_ALT_PCNT(ppdev, pjMmBase, dstWidth - 1, dstHeight - 1);
NW_ALT_CMD(ppdev, pjMmBase, ulBltCmd);
}
}
//////////////////////////////////////////////////////////////////////
// Pixel Formatter Blts
//
// We can do stretches or funky pixel format blts only if a pixel
// formatter is present. Plus, we set our 'ddCaps' such that we
// shouldn't have to handle any shrinks.
//
// (We check to make sure we weren't asked to do a shrink, because we
// would probably hang if the application ignored what we told them
// and asked for a shrink):
else if ((ppdev->flCaps & CAPS_PIXEL_FORMATTER) &&
(srcWidth <= dstWidth) &&
(srcHeight <= dstHeight))
{
if ((dwFlags & DDBLT_KEYSRCOVERRIDE) ||
(dstWidth >= 4 * srcWidth))
{
// Contrary to what we're indicating in our capabilities, we
// can't colour key on stretches or pixel format conversions.
// The S3 hardware also can't do stretches of four times or
// more.
return(DDHAL_DRIVER_NOTHANDLED);
}
dwVEctrl = ~dstWidth & 0x00000FFF; // Initial accumulator
dwVEdda = 0x10000000 // Some reserved bit?
| (STRETCH | SCREEN) // Scale from video memory
| (srcWidth << 16) // K1
| ((srcWidth - dstWidth) & 0x7FF); // K2
// We'll be doing the vertical stretching in software, so calculate
// the DDA terms here. We have the luxury of not worrying about
// overflow because DirectDraw limits our coordinate space to 15
// bits.
//
// Note that dwRGBBitCount is overloaded with dwYUVBitCount:
dwSrcByteCount = srcSurf->ddpfSurface.dwRGBBitCount >> 3;
if (srcSurf->ddpfSurface.dwFlags & DDPF_FOURCC)
{
dwVEctrl |= INPUT_YCrCb422 | CSCENABLE; // Not INPUT_YUV422!
}
else if (srcSurf->ddpfSurface.dwFlags & DDPF_RGB)
{
switch (dwSrcByteCount)
{
case 1:
dwVEctrl |= INPUT_RGB8;
break;
case 2:
if (IS_RGB15_R(srcSurf->ddpfSurface.dwRBitMask))
dwVEctrl |= INPUT_RGB15;
else
dwVEctrl |= INPUT_RGB16;
break;
default:
dwVEctrl |= INPUT_RGB32;
break;
}
}
dwDstByteCount = dstSurf->ddpfSurface.dwRGBBitCount >> 3;
switch (dwDstByteCount)
{
case 1:
dwVEctrl |= OUTPUT_RGB8;
break;
case 2:
if (IS_RGB15_R(dstSurf->ddpfSurface.dwRBitMask))
dwVEctrl |= OUTPUT_RGB15;
else
dwVEctrl |= OUTPUT_RGB16;
break;
default:
dwVEctrl |=OUTPUT_RGB32;
break;
}
if (dwDstByteCount > 1)
{
dwVEctrl |= FILTERENABLE;
if (dstWidth > 2 * srcWidth)
dwVEdda |= LINEAR12221; // linear, 1-2-2-2-1, >2X stretch
else if (dstWidth > srcWidth)
dwVEdda |= LINEAR02420; // linear, 0-2-4-2-0, 1-2X stretch
else
dwVEdda |= BILINEAR; // bi-linear, <1X stretch
}
dwVEsrcAddr = (DWORD)(srcSurf->fpVidMem + (srcY * srcSurf->lPitch)
+ (srcX * dwSrcByteCount));
dwVEdstAddr = (DWORD)(dstSurf->fpVidMem + (dstY * dstSurf->lPitch)
+ (dstX * dwDstByteCount));
srcPitch = srcSurf->lPitch;
dstPitch = dstSurf->lPitch;
// The S3's source alignment within the dword must be done using the
// crop register:
dwVEcrop = dstWidth;
if (dwVEsrcAddr & 3)
{
dwSrcBytes = (srcWidth * dwSrcByteCount);
// Transform the number of source pixels to the number of
// corresponding destination pixels, and round the result:
dwCropSkip = ((dwVEsrcAddr & 3) * dstWidth + (dwSrcBytes >> 1))
/ dwSrcBytes;
dwVEcrop += (dwCropSkip << 16);
dwVEsrcAddr &= ~3;
}
// We have to run the vertical DDA ourselves:
dwError = srcHeight >> 1;
i = dstHeight;
// Watch out for a hardware bug the destination will be 32 pixels
// or less:
//
// We'll use 40 as our minimum width to guarantee we shouldn't
// crash.
if (dstWidth >= 40)
{
// The S3 will sometimes hang when using the video engine with
// certain end-byte alignments. We'll simply lengthen the blt in
// this case and hope that no-one notices:
if (((dwVEdstAddr + (dstWidth * dwDstByteCount)) & 7) == 4)
{
dwVEcrop++;
}
// We have to execute a graphics engine NOP before using the
// pixel formatter video engine:
NW_FIFO_WAIT(ppdev, pjMmBase, 1);
NW_ALT_CMD(ppdev, pjMmBase, 0);
NW_GP_WAIT(ppdev, pjMmBase);
// Set up some non-variant registers:
NW_FIFO_WAIT(ppdev, pjMmBase, 4);
WRITE_FORMATTER_D(pjMmBase, PF_CONTROL, dwVEctrl);
WRITE_FORMATTER_D(pjMmBase, PF_DDA, dwVEdda);
WRITE_FORMATTER_D(pjMmBase, PF_STEP, ppdev->dwVEstep);
WRITE_FORMATTER_D(pjMmBase, PF_CROP, dwVEcrop);
do {
NW_FIFO_WAIT(ppdev, pjMmBase, 3);
WRITE_FORMATTER_D(pjMmBase, PF_SRCADDR, dwVEsrcAddr);
WRITE_FORMATTER_D(pjMmBase, PF_DSTADDR, dwVEdstAddr);
WRITE_FORMATTER_D(pjMmBase, PF_NOP, 0);
NW_FORMATTER_WAIT(ppdev, pjMmBase);
dwVEdstAddr += dstPitch;
dwError += srcHeight;
if (dwError >= dstHeight)
{
dwError -= dstHeight;
dwVEsrcAddr += srcPitch;
}
} while (--i != 0);
}
else if (dwDstByteCount != (DWORD) ppdev->cjPelSize)
{
// Because for narrow video engine blts we have to copy the
// result using the normal graphics accelerator on a pixel
// basis, we can't handle funky destination colour depths.
// I expect zero applications to ask for narrow blts that
// hit this case, so we will simply fail the call should it
// ever actually occur:
return(DDHAL_DRIVER_NOTHANDLED);
}
else
{
// The S3 will hang if we blt less than 32 pixels via the
// pixel formatter. Unfortunately, we can't simply return
// DDHAL_DRIVER_NOTHANDLED for this case. We said we'd do
// hardware stretches, so we have to handle all hardware
// stretches.
//
// We work around the problem by doing a 32 pixel stretch to
// a piece of off-screen memory, then blting the appropriate
// subset to the correct position on the screen.
//
// 32 isn't big enough. We still hang. Lets make it 40.
dwVEcrop = 32 + 8;
convertToGlobalCord(dstX, dstY, dstSurf);
srcX = ppdev->pdsurfVideoEngineScratch->x;
srcY = ppdev->pdsurfVideoEngineScratch->y;
dwVEdstAddr = (srcY * ppdev->lDelta) + (srcX * ppdev->cjPelSize);
ASSERTDD(((dwVEdstAddr + (dwVEcrop * dwDstByteCount)) & 7) != 4,
"Must account for S3 end-alignment bug");
do {
// Use the pixel formatter to blt to our scratch area:
NW_FIFO_WAIT(ppdev, pjMmBase, 1);
NW_ALT_CMD(ppdev, pjMmBase, 0);
NW_GP_WAIT(ppdev, pjMmBase);
NW_FIFO_WAIT(ppdev, pjMmBase, 7);
WRITE_FORMATTER_D(pjMmBase, PF_CONTROL, dwVEctrl);
WRITE_FORMATTER_D(pjMmBase, PF_DDA, dwVEdda);
WRITE_FORMATTER_D(pjMmBase, PF_STEP, ppdev->dwVEstep);
WRITE_FORMATTER_D(pjMmBase, PF_CROP, dwVEcrop);
WRITE_FORMATTER_D(pjMmBase, PF_SRCADDR, dwVEsrcAddr);
WRITE_FORMATTER_D(pjMmBase, PF_DSTADDR, dwVEdstAddr);
WRITE_FORMATTER_D(pjMmBase, PF_NOP, 0);
NW_FORMATTER_WAIT(ppdev, pjMmBase);
dwError += srcHeight;
if (dwError >= dstHeight)
{
dwError -= dstHeight;
dwVEsrcAddr += srcPitch;
}
// Now copy from the scratch area to the final destination:
NW_FIFO_WAIT(ppdev, pjMmBase, 6);
NW_ALT_MIX(ppdev, pjMmBase, SRC_DISPLAY_MEMORY | OVERPAINT, 0);
NW_PIX_CNTL(ppdev, pjMmBase, ALL_ONES);
NW_ABS_CURXY_FAST(ppdev, pjMmBase, srcX, srcY);
NW_ABS_DESTXY_FAST(ppdev, pjMmBase, dstX, dstY);
NW_ALT_PCNT(ppdev, pjMmBase, dstWidth - 1, 0);
NW_ALT_CMD(ppdev, pjMmBase, BITBLT | DRAW | DIR_TYPE_XY |
WRITE | DRAWING_DIR_TBLRXM);
dstY++;
} while (--i != 0);
}
}
else
{
//////////////////////////////////////////////////////////////////////
// Overlay Blts
//
// Here we have to take care of cases where the destination is a
// funky pixel format.
// In order to make ActiveMovie and DirectVideo work, we have
// to support blting between funky pixel format surfaces of the
// same type. This is used to copy the current frame to the
// next overlay surface in line.
//
// Unfortunately, it's not easy to switch the S3 graphics
// processor out of its current pixel depth, so we'll only support
// the minimal functionality required:
if (!(dwFlags & DDBLT_ROP) ||
(srcX != 0) ||
(srcY != 0) ||
(dstX != 0) ||
(dstY != 0) ||
(dstWidth != dstSurf->wWidth) ||
(dstHeight != dstSurf->wHeight) ||
(dstSurf->lPitch != srcSurf->lPitch) ||
(dstSurf->ddpfSurface.dwRGBBitCount
!= srcSurf->ddpfSurface.dwRGBBitCount))
{
DISPDBG((0, "Sorry, we do only full-surface blts between same-type"));
DISPDBG((0, "surfaces that have a funky pixel format."));
return(DDHAL_DRIVER_NOTHANDLED);
}
else
{
// Convert the dimensions to the current pixel format. This
// is pretty easy because we created the bitmap linearly, so
// it takes the entire width of the screen:
dstWidth = ppdev->cxMemory;
dstHeight = dstSurf->dwBlockSizeY;
convertToGlobalCord(dstX, dstY, dstSurf);
convertToGlobalCord(srcX, srcY, srcSurf);
NW_FIFO_WAIT(ppdev, pjMmBase, 6);
NW_ALT_MIX(ppdev, pjMmBase, SRC_DISPLAY_MEMORY | OVERPAINT, 0);
NW_PIX_CNTL(ppdev, pjMmBase, ALL_ONES);
NW_ABS_CURXY_FAST(ppdev, pjMmBase, srcX, srcY);
NW_ABS_DESTXY_FAST(ppdev, pjMmBase, dstX, dstY);
NW_ALT_PCNT(ppdev, pjMmBase, dstWidth - 1, dstHeight - 1);
NW_ALT_CMD(ppdev, pjMmBase, BITBLT | DRAW | DIR_TYPE_XY |
WRITE | DRAWING_DIR_TBLRXM);
}
}
lpBlt->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdFlip
*
* Note that lpSurfCurr may not necessarily be valid.
*
\**************************************************************************/
DWORD DdFlip(
PDD_FLIPDATA lpFlip)
{
PDEV* ppdev;
BYTE* pjIoBase;
BYTE* pjMmBase;
HRESULT ddrval;
ULONG ulMemoryOffset;
ULONG ulLowOffset;
ULONG ulMiddleOffset;
ULONG ulHighOffset;
ppdev = (PDEV*) lpFlip->lpDD->dhpdev;
pjIoBase = ppdev->pjIoBase;
pjMmBase = ppdev->pjMmBase;
// 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 = ddrvalUpdateFlipStatus(ppdev, (FLATPTR) -1);
if ((ddrval != DD_OK) || (NW_GP_BUSY(ppdev, pjMmBase)))
{
lpFlip->ddRVal = DDERR_WASSTILLDRAWING;
return(DDHAL_DRIVER_HANDLED);
}
ulMemoryOffset = (ULONG)(lpFlip->lpSurfTarg->lpGbl->fpVidMem);
// 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(pjIoBase)))
;
if (ppdev->flStatus & STAT_STREAMS_ENABLED)
{
// When using the streams processor, we have to do the flip via the
// streams registers:
if (lpFlip->lpSurfCurr->ddsCaps.dwCaps & DDSCAPS_PRIMARYSURFACE)
{
WRITE_STREAM_D(pjMmBase, P_0, ulMemoryOffset);
}
else if (lpFlip->lpSurfCurr->ddsCaps.dwCaps & DDSCAPS_OVERLAY)
{
// Make sure that the overlay surface we're flipping from is
// currently visible. If you don't do this check, you'll get
// really weird results when someone starts up two ActiveMovie
// or DirectVideo movies simultaneously!
if (lpFlip->lpSurfCurr->lpGbl->fpVidMem == ppdev->fpVisibleOverlay)
{
ppdev->fpVisibleOverlay = ulMemoryOffset;
WRITE_STREAM_D(pjMmBase, S_0, ulMemoryOffset +
ppdev->dwOverlayFlipOffset);
}
}
}
else
{
// Do the old way, via the CRTC registers:
ulMemoryOffset >>= 2;
ulLowOffset = 0x0d | ((ulMemoryOffset & 0x0000ff) << 8);
ulMiddleOffset = 0x0c | ((ulMemoryOffset & 0x00ff00));
ulHighOffset = 0x69 | ((ulMemoryOffset & 0x1f0000) >> 8)
| ppdev->ulExtendedSystemControl3Register_69;
// Don't let the cursor thread touch the CRT registers while we're
// using them:
ACQUIRE_CRTC_CRITICAL_SECTION(ppdev);
// Too bad that the S3's flip can't be done in a single atomic register
// write; as it is, we stand a small chance of being context-switched
// out and exactly hitting the vertical blank in the middle of doing
// these outs, possibly causing the screen to momentarily jump.
//
// There are some hoops we could jump through to minimize the chances
// of this happening; we could try to align the flip buffer such that
// the minor registers are ensured to be identical for either flip
// position, and so that only the high address need be written, an
// obviously atomic operation.
//
// However, I'm simply not going to worry about it.
OUTPW(pjIoBase, CRTC_INDEX, ulLowOffset);
OUTPW(pjIoBase, CRTC_INDEX, ulMiddleOffset);
OUTPW(pjIoBase, CRTC_INDEX, ulHighOffset);
RELEASE_CRTC_CRITICAL_SECTION(ppdev);
}
// 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;
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdLock
*
\**************************************************************************/
DWORD DdLock(
PDD_LOCKDATA lpLock)
{
PDEV* ppdev;
BYTE* pjMmBase;
HRESULT ddrval;
ppdev = (PDEV*) lpLock->lpDD->dhpdev;
pjMmBase = ppdev->pjMmBase;
// Check to see if any pending physical flip has occurred. Don't allow
// a lock if a blt is in progress:
ddrval = ddrvalUpdateFlipStatus(ppdev, lpLock->lpDDSurface->lpGbl->fpVidMem);
if (ddrval != DD_OK)
{
lpLock->ddRVal = DDERR_WASSTILLDRAWING;
return(DDHAL_DRIVER_HANDLED);
}
// Here's one of the places where the Windows 95 and Windows NT DirectDraw
// implementations differ: on Windows NT, you should watch for
// DDLOCK_WAIT and loop in the driver while the accelerator is busy.
// On Windows 95, it doesn't really matter.
//
// (The reason is that Windows NT allows applications to draw directly
// to the frame buffer even while the accelerator is running, and does
// not synchronize everything on the Win16Lock. Note that on Windows NT,
// it is even possible for multiple threads to be holding different
// DirectDraw surface locks at the same time.)
if (lpLock->dwFlags & DDLOCK_WAIT)
{
NW_GP_WAIT(ppdev, pjMmBase);
}
else if (NW_GP_BUSY(ppdev, pjMmBase))
{
lpLock->ddRVal = DDERR_WASSTILLDRAWING;
return(DDHAL_DRIVER_HANDLED);
}
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* pjMmBase;
HRESULT ddRVal;
ppdev = (PDEV*) lpGetBltStatus->lpDD->dhpdev;
pjMmBase = ppdev->pjMmBase;
ddRVal = DD_OK;
if (lpGetBltStatus->dwFlags == DDGBS_CANBLT)
{
// DDGBS_CANBLT case: can we add a blt?
ddRVal = ddrvalUpdateFlipStatus(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?
if (MM_FIFO_BUSY(ppdev, pjMmBase, DDBLT_FIFO_COUNT))
{
ddRVal = DDERR_WASSTILLDRAWING;
}
}
}
else
{
// DDGBS_ISBLTDONE case: is a blt in progress?
if (NW_GP_BUSY(ppdev, pjMmBase))
{
ddRVal = DDERR_WASSTILLDRAWING;
}
}
lpGetBltStatus->ddRVal = ddRVal;
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;
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;
return(DDHAL_DRIVER_HANDLED);
}
lpMapMemory->fpProcess = (FLATPTR)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;
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* pjMmBase;
ppdev = (PDEV*) lpGetFlipStatus->lpDD->dhpdev;
pjMmBase = ppdev->pjMmBase;
// 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 = ddrvalUpdateFlipStatus(ppdev, (FLATPTR) -1);
// 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) && (NW_GP_BUSY(ppdev, pjMmBase)))
{
lpGetFlipStatus->ddRVal = DDERR_WASSTILLDRAWING;
}
}
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdWaitForVerticalBlank
*
\**************************************************************************/
DWORD DdWaitForVerticalBlank(
PDD_WAITFORVERTICALBLANKDATA lpWaitForVerticalBlank)
{
PDEV* ppdev;
BYTE* pjIoBase;
ppdev = (PDEV*) lpWaitForVerticalBlank->lpDD->dhpdev;
pjIoBase = ppdev->pjIoBase;
switch (lpWaitForVerticalBlank->dwFlags)
{
case DDWAITVB_I_TESTVB:
// If TESTVB, it's just a request for the current vertical blank
// status:
if (VBLANK_IS_ACTIVE(pjIoBase))
lpWaitForVerticalBlank->bIsInVB = TRUE;
else
lpWaitForVerticalBlank->bIsInVB = FALSE;
lpWaitForVerticalBlank->ddRVal = DD_OK;
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(pjIoBase))
;
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
lpWaitForVerticalBlank->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
case DDWAITVB_BLOCKEND:
// If BLOCKEND is requested, we wait for the vblank interval to end:
while (!(VBLANK_IS_ACTIVE(pjIoBase)))
;
while (VBLANK_IS_ACTIVE(pjIoBase))
;
lpWaitForVerticalBlank->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdCanCreateSurface
*
\**************************************************************************/
DWORD DdCanCreateSurface(
PDD_CANCREATESURFACEDATA lpCanCreateSurface)
{
PDEV* ppdev;
DWORD dwRet;
LPDDSURFACEDESC lpSurfaceDesc;
ppdev = (PDEV*) lpCanCreateSurface->lpDD->dhpdev;
lpSurfaceDesc = lpCanCreateSurface->lpDDSurfaceDesc;
dwRet = DDHAL_DRIVER_NOTHANDLED;
if (!lpCanCreateSurface->bIsDifferentPixelFormat)
{
// It's trivially easy to create plain surfaces that are the same
// type as the primary surface:
dwRet = DDHAL_DRIVER_HANDLED;
}
// If the streams processor is capable, we can handle overlays:
else if (ppdev->flCaps & CAPS_STREAMS_CAPABLE)
{
// When using the Streams processor, we handle only overlays of
// different pixel formats -- not any off-screen memory:
if (lpSurfaceDesc->ddsCaps.dwCaps & DDSCAPS_OVERLAY)
{
// We handle two types of YUV overlay surfaces:
if (lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_FOURCC)
{
// Check first for a supported YUV type:
if (lpSurfaceDesc->ddpfPixelFormat.dwFourCC == FOURCC_YUY2)
{
lpSurfaceDesc->ddpfPixelFormat.dwYUVBitCount = 16;
dwRet = DDHAL_DRIVER_HANDLED;
}
}
// We handle 16bpp and 32bpp RGB overlay surfaces:
else if ((lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_RGB) &&
!(lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_PALETTEINDEXED8))
{
if (lpSurfaceDesc->ddpfPixelFormat.dwRGBBitCount == 16)
{
if (IS_RGB15(&lpSurfaceDesc->ddpfPixelFormat) ||
IS_RGB16(&lpSurfaceDesc->ddpfPixelFormat))
{
dwRet = DDHAL_DRIVER_HANDLED;
}
}
// We don't handle 24bpp overlay surfaces because they are
// undocumented and don't seem to work on the Trio64V+.
//
// We don't handle 32bpp overlay surfaces because our streams
// minimum-stretch-ratio tables were obviously created for
// 16bpp overlay surfaces; 32bpp overlay surfaces create a lot
// of noise when close to the minimum stretch ratio.
}
}
}
// If the pixel formatter is enabled, we can handle funky format off-
// screen surfaces, but not at 8bpp because of palette issues:
else if ((ppdev->flCaps & CAPS_PIXEL_FORMATTER) &&
(ppdev->iBitmapFormat > BMF_8BPP))
{
if (lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_FOURCC)
{
if (lpSurfaceDesc->ddpfPixelFormat.dwFourCC == FOURCC_YUY2)
{
lpSurfaceDesc->ddpfPixelFormat.dwYUVBitCount = 16;
dwRet = DDHAL_DRIVER_HANDLED;
}
}
// We handle 16bpp and 32bpp RGB off-screen surfaces:
else if ((lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_RGB) &&
!(lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_PALETTEINDEXED8))
{
if (lpSurfaceDesc->ddpfPixelFormat.dwRGBBitCount == 16)
{
if (IS_RGB15(&lpSurfaceDesc->ddpfPixelFormat) ||
IS_RGB16(&lpSurfaceDesc->ddpfPixelFormat))
{
dwRet = DDHAL_DRIVER_HANDLED;
}
}
else if (lpSurfaceDesc->ddpfPixelFormat.dwRGBBitCount == 32)
{
if (IS_RGB32(&lpSurfaceDesc->ddpfPixelFormat))
{
dwRet = DDHAL_DRIVER_HANDLED;
}
}
}
}
// Print some spew if this was a surface we refused to create:
if (dwRet == DDHAL_DRIVER_NOTHANDLED)
{
if (lpSurfaceDesc->ddpfPixelFormat.dwFlags & DDPF_RGB)
{
DISPDBG((0, "Failed creation of %libpp RGB surface %lx %lx %lx",
lpSurfaceDesc->ddpfPixelFormat.dwRGBBitCount,
lpSurfaceDesc->ddpfPixelFormat.dwRBitMask,
lpSurfaceDesc->ddpfPixelFormat.dwGBitMask,
lpSurfaceDesc->ddpfPixelFormat.dwBBitMask));
}
else
{
DISPDBG((0, "Failed creation of type 0x%lx YUV 0x%lx surface",
lpSurfaceDesc->ddpfPixelFormat.dwFlags,
lpSurfaceDesc->ddpfPixelFormat.dwFourCC));
}
}
lpCanCreateSurface->ddRVal = DD_OK;
return(dwRet);
}
/******************************Public*Routine******************************\
* DWORD DdCreateSurface
*
\**************************************************************************/
DWORD DdCreateSurface(
PDD_CREATESURFACEDATA lpCreateSurface)
{
PDEV* ppdev;
DD_SURFACE_LOCAL* lpSurfaceLocal;
DD_SURFACE_GLOBAL* lpSurfaceGlobal;
LPDDSURFACEDESC lpSurfaceDesc;
DWORD dwByteCount;
LONG lLinearPitch;
DWORD dwHeight;
ppdev = (PDEV*) lpCreateSurface->lpDD->dhpdev;
// On Windows NT, dwSCnt will always be 1, so there will only ever
// be one entry in the 'lplpSList' array:
lpSurfaceLocal = lpCreateSurface->lplpSList[0];
lpSurfaceGlobal = lpSurfaceLocal->lpGbl;
lpSurfaceDesc = lpCreateSurface->lpDDSurfaceDesc;
// We repeat the same checks we did in 'DdCanCreateSurface' because
// it's possible that an application doesn't call 'DdCanCreateSurface'
// before calling 'DdCreateSurface'.
ASSERTDD(lpSurfaceGlobal->ddpfSurface.dwSize == sizeof(DDPIXELFORMAT),
"NT is supposed to guarantee that ddpfSurface.dwSize is valid");
// DdCanCreateSurface already validated whether the hardware supports
// the surface, so we don't need to do any validation here. We'll
// just go ahead and allocate it.
//
// Note that we don't do anything special for RGB surfaces that are
// the same pixel format as the display -- by returning DDHAL_DRIVER_
// NOTHANDLED, DirectDraw will automatically handle the allocation
// for us.
//
// Also, since we'll be making linear surfaces, make sure the width
// isn't unreasonably large.
//
// Note that on NT, an overlay can be created only if the driver
// okay's it here in this routine. Under Win95, the overlay will be
// created automatically if it's the same pixel format as the primary
// display.
if ((lpSurfaceLocal->ddsCaps.dwCaps & DDSCAPS_OVERLAY) ||
(lpSurfaceGlobal->ddpfSurface.dwFlags & DDPF_FOURCC) ||
(lpSurfaceGlobal->ddpfSurface.dwYUVBitCount
!= (DWORD) 8 * ppdev->cjPelSize) ||
(lpSurfaceGlobal->ddpfSurface.dwRBitMask != ppdev->flRed))
{
if (lpSurfaceGlobal->wWidth <= (DWORD) ppdev->cxMemory)
{
// The S3 cannot easily draw to YUV surfaces or surfaces that are
// a different RGB format than the display. So we'll make them
// linear surfaces to save some space:
if (lpSurfaceGlobal->ddpfSurface.dwFlags & DDPF_FOURCC)
{
ASSERTDD((lpSurfaceGlobal->ddpfSurface.dwFourCC == FOURCC_YUY2),
"Expected our DdCanCreateSurface to allow only YUY2 or Y211");
dwByteCount = (lpSurfaceGlobal->ddpfSurface.dwFourCC == FOURCC_YUY2)
? 2 : 1;
// We have to fill in the bit-count for FourCC surfaces:
lpSurfaceGlobal->ddpfSurface.dwYUVBitCount = 8 * dwByteCount;
DISPDBG((0, "Created YUV: %li x %li",
lpSurfaceGlobal->wWidth, lpSurfaceGlobal->wHeight));
}
else
{
dwByteCount = lpSurfaceGlobal->ddpfSurface.dwRGBBitCount >> 3;
DISPDBG((0, "Created RGB %libpp: %li x %li Red: %lx",
8 * dwByteCount, lpSurfaceGlobal->wWidth, lpSurfaceGlobal->wHeight,
lpSurfaceGlobal->ddpfSurface.dwRBitMask));
// The S3 can't handle palettized or 32bpp overlays. Note that
// we sometimes don't get a chance to say no to these surfaces
// in CanCreateSurface, because DirectDraw won't call
// CanCreateSurface if the surface to be created is the same
// pixel format as the primary display:
if ((dwByteCount != 2) &&
(lpSurfaceLocal->ddsCaps.dwCaps & DDSCAPS_OVERLAY))
{
lpCreateSurface->ddRVal = DDERR_INVALIDPIXELFORMAT;
return(DDHAL_DRIVER_HANDLED);
}
}
// We want to allocate a linear surface to store the FourCC
// surface, but DirectDraw is using a 2-D heap-manager because
// the rest of our surfaces have to be 2-D. So here we have to
// convert the linear size to a 2-D size.
//
// The stride has to be a dword multiple:
lLinearPitch = (lpSurfaceGlobal->wWidth * dwByteCount + 3) & ~3;
dwHeight = (lpSurfaceGlobal->wHeight * lLinearPitch
+ ppdev->lDelta - 1) / ppdev->lDelta;
// Now fill in enough stuff to have the DirectDraw heap-manager
// do the allocation for us:
lpSurfaceGlobal->fpVidMem = DDHAL_PLEASEALLOC_BLOCKSIZE;
lpSurfaceGlobal->dwBlockSizeX = ppdev->lDelta; // Specified in bytes
lpSurfaceGlobal->dwBlockSizeY = dwHeight;
lpSurfaceGlobal->lPitch = lLinearPitch;
lpSurfaceGlobal->dwReserved1 = DD_RESERVED_DIFFERENTPIXELFORMAT;
lpSurfaceDesc->lPitch = lLinearPitch;
lpSurfaceDesc->dwFlags |= DDSD_PITCH;
}
else
{
DISPDBG((0, "Refused to create surface with large width"));
}
}
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdFreeDriverMemory
*
* This function called by DirectDraw when it's running low on memory in
* our heap. You only need to implement this function if you use the
* DirectDraw 'HeapVidMemAllocAligned' function in your driver, and you
* can boot those allocations out of memory to make room for DirectDraw.
*
* We implement this function in the S3 driver because we have DirectDraw
* entirely manage our off-screen heap, and we use HeapVidMemAllocAligned
* to put GDI device-bitmaps in off-screen memory. DirectDraw applications
* have a higher priority for getting stuff into video memory, though, and
* so this function is used to boot those GDI surfaces out of memory in
* order to make room for DirectDraw.
*
\**************************************************************************/
DWORD DdFreeDriverMemory(
PDD_FREEDRIVERMEMORYDATA lpFreeDriverMemory)
{
PDEV* ppdev;
ppdev = (PDEV*) lpFreeDriverMemory->lpDD->dhpdev;
lpFreeDriverMemory->ddRVal = DDERR_OUTOFMEMORY;
// If we successfully freed up some memory, set the return value to
// 'DD_OK'. DirectDraw will try again to do its allocation, and
// will call us again if there's still not enough room. (It will
// call us until either there's enough room for its alocation to
// succeed, or until we return something other than DD_OK.)
if (bMoveOldestOffscreenDfbToDib(ppdev))
{
lpFreeDriverMemory->ddRVal = DD_OK;
}
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdSetColorKey
*
\**************************************************************************/
DWORD DdSetColorKey(
PDD_SETCOLORKEYDATA lpSetColorKey)
{
PDEV* ppdev;
BYTE* pjIoBase;
BYTE* pjMmBase;
DD_SURFACE_GLOBAL* lpSurface;
DWORD dwKeyLow;
DWORD dwKeyHigh;
ppdev = (PDEV*) lpSetColorKey->lpDD->dhpdev;
ASSERTDD(ppdev->flCaps & CAPS_STREAMS_CAPABLE, "Shouldn't have hooked call");
pjIoBase = ppdev->pjIoBase;
pjMmBase = ppdev->pjMmBase;
lpSurface = lpSetColorKey->lpDDSurface->lpGbl;
// We don't have to do anything for normal blt source colour keys:
if (lpSetColorKey->dwFlags & DDCKEY_SRCBLT)
{
lpSetColorKey->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
else if (lpSetColorKey->dwFlags & DDCKEY_DESTOVERLAY)
{
dwKeyLow = lpSetColorKey->ckNew.dwColorSpaceLowValue;
if (lpSurface->ddpfSurface.dwFlags & DDPF_PALETTEINDEXED8)
{
dwKeyLow = dwGetPaletteEntry(ppdev, dwKeyLow);
}
else
{
ASSERTDD(lpSurface->ddpfSurface.dwFlags & DDPF_RGB,
"Expected only RGB cases here");
// We have to transform the colour key from its native format
// to 8-8-8:
if (lpSurface->ddpfSurface.dwRGBBitCount == 16)
{
if (IS_RGB15_R(lpSurface->ddpfSurface.dwRBitMask))
dwKeyLow = RGB15to32(dwKeyLow);
else
dwKeyLow = RGB16to32(dwKeyLow);
}
else
{
ASSERTDD((lpSurface->ddpfSurface.dwRGBBitCount == 32),
"Expected the primary surface to be either 8, 16, or 32bpp");
}
}
dwKeyHigh = dwKeyLow;
dwKeyLow |= CompareBits0t7 | KeyFromCompare;
// Check for stream processor enabled before setting registers
if(ppdev->flStatus & STAT_STREAMS_ENABLED)
{
WAIT_FOR_VBLANK(pjIoBase);
WRITE_STREAM_D(pjMmBase, CKEY_LOW, dwKeyLow);
WRITE_STREAM_D(pjMmBase, CKEY_HI, dwKeyHigh);
}
else
{
// Save away the color key to be set when streams
// processor is turned on.
ppdev->ulColorKey = dwKeyHigh;
}
lpSetColorKey->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
DISPDBG((0, "DdSetColorKey: Invalid command"));
return(DDHAL_DRIVER_NOTHANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdUpdateOverlay
*
\**************************************************************************/
DWORD DdUpdateOverlay(
PDD_UPDATEOVERLAYDATA lpUpdateOverlay)
{
PDEV* ppdev;
BYTE* pjIoBase;
BYTE* pjMmBase;
DD_SURFACE_GLOBAL* lpSource;
DD_SURFACE_GLOBAL* lpDestination;
DWORD dwStride;
LONG srcWidth;
LONG srcHeight;
LONG dstWidth;
LONG dstHeight;
DWORD dwBitCount;
DWORD dwStart;
DWORD dwTmp;
BOOL bColorKey;
DWORD dwKeyLow;
DWORD dwKeyHigh;
DWORD dwBytesPerPixel;
DWORD dwSecCtrl;
DWORD dwBlendCtrl;
ppdev = (PDEV*) lpUpdateOverlay->lpDD->dhpdev;
ASSERTDD(ppdev->flCaps & CAPS_STREAMS_CAPABLE, "Shouldn't have hooked call");
pjIoBase = ppdev->pjIoBase;
pjMmBase = ppdev->pjMmBase;
// 'Source' is the overlay surface, 'destination' is the surface to
// be overlayed:
lpSource = lpUpdateOverlay->lpDDSrcSurface->lpGbl;
if (lpUpdateOverlay->dwFlags & DDOVER_HIDE)
{
if (lpSource->fpVidMem == ppdev->fpVisibleOverlay)
{
WAIT_FOR_VBLANK(pjIoBase);
WRITE_STREAM_D(pjMmBase, BLEND_CONTROL, POnS);
WRITE_STREAM_D(pjMmBase, S_WH, WH(10, 2)); // Set to 10x2 rectangle
WRITE_STREAM_D(pjMmBase, OPAQUE_CONTROL, 0);// Disable opaque control
ppdev->fpVisibleOverlay = 0;
ASSERTDD(ppdev->flStatus & STAT_STREAMS_ENABLED,
"Expected streams to be enabled");
ppdev->flStatus &= ~STAT_STREAMS_ENABLED;
vTurnOffStreamsProcessorMode(ppdev);
}
lpUpdateOverlay->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
// Dereference 'lpDDDestSurface' only after checking for the DDOVER_HIDE
// case:
lpDestination = lpUpdateOverlay->lpDDDestSurface->lpGbl;
if (lpSource->fpVidMem != ppdev->fpVisibleOverlay)
{
if (lpUpdateOverlay->dwFlags & DDOVER_SHOW)
{
if (ppdev->fpVisibleOverlay != 0)
{
// Some other overlay is already visible:
DISPDBG((0, "DdUpdateOverlay: An overlay is already visible"));
lpUpdateOverlay->ddRVal = DDERR_OUTOFCAPS;
return(DDHAL_DRIVER_HANDLED);
}
else
{
// We're going to make the overlay visible, so mark it as
// such:
ppdev->fpVisibleOverlay = lpSource->fpVidMem;
}
}
else
{
// The overlay isn't visible, and we haven't been asked to make
// it visible, so this call is trivially easy:
lpUpdateOverlay->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
}
if (!(ppdev->flStatus & STAT_STREAMS_ENABLED))
{
ppdev->flStatus |= STAT_STREAMS_ENABLED;
vTurnOnStreamsProcessorMode(ppdev);
}
dwStride = lpSource->lPitch;
srcWidth = lpUpdateOverlay->rSrc.right - lpUpdateOverlay->rSrc.left;
srcHeight = lpUpdateOverlay->rSrc.bottom - lpUpdateOverlay->rSrc.top;
dstWidth = lpUpdateOverlay->rDest.right - lpUpdateOverlay->rDest.left;
dstHeight = lpUpdateOverlay->rDest.bottom - lpUpdateOverlay->rDest.top;
// Calculate DDA horizonal accumulator initial value:
dwSecCtrl = HDDA(srcWidth, dstWidth);
// Overlay input data format:
if (lpSource->ddpfSurface.dwFlags & DDPF_FOURCC)
{
dwBitCount = lpSource->ddpfSurface.dwYUVBitCount;
switch (lpSource->ddpfSurface.dwFourCC)
{
case FOURCC_YUY2:
dwSecCtrl |= S_YCrCb422; // Not S_YUV422! Dunno why...
break;
default:
RIP("Unexpected FourCC");
}
}
else
{
ASSERTDD(lpSource->ddpfSurface.dwFlags & DDPF_RGB,
"Expected us to have created only RGB or YUV overlays");
// The overlay surface is in RGB format:
dwBitCount = lpSource->ddpfSurface.dwRGBBitCount;
ASSERTDD(dwBitCount == 16,
"Expected us to have created 16bpp RGB surfaces only");
if (IS_RGB15_R(lpSource->ddpfSurface.dwRBitMask))
dwSecCtrl |= S_RGB15;
else
dwSecCtrl |= S_RGB16;
}
// Calculate start of video memory in QWORD boundary
dwBytesPerPixel = dwBitCount >> 3;
dwStart = (lpUpdateOverlay->rSrc.top * dwStride)
+ (lpUpdateOverlay->rSrc.left * dwBytesPerPixel);
// Note that since we're shifting the source's edge to the left, we
// should really increase the source width to compensate. However,
// doing so when running at 1 to 1 would cause us to request a
// shrinking overlay -- something the S3 can't do.
dwStart = dwStart - (dwStart & 0x7);
ppdev->dwOverlayFlipOffset = dwStart; // Save for flip
dwStart += (DWORD)lpSource->fpVidMem;
// Set overlay filter characteristics:
if ((dstWidth != srcWidth) || (dstHeight != srcHeight))
{
if (dstWidth >= (srcWidth << 2))
{
dwSecCtrl |= S_Beyond4x; // Linear, 1-2-2-2-1, for >4X stretch
}
else if (dstWidth >= (srcWidth << 1))
{
dwSecCtrl |= S_2xTo4x; // Bi-linear, for 2X to 4X stretch
}
else
{
dwSecCtrl |= S_Upto2x; // Linear, 0-2-4-2-0, for X stretch
}
}
// Extract colour key:
bColorKey = FALSE;
dwBlendCtrl = 0;
if (lpUpdateOverlay->dwFlags & DDOVER_KEYDEST)
{
bColorKey = TRUE;
dwKeyLow = lpUpdateOverlay->lpDDDestSurface->ddckCKDestOverlay.dwColorSpaceLowValue;
dwBlendCtrl |= KeyOnP;
}
else if (lpUpdateOverlay->dwFlags & DDOVER_KEYDESTOVERRIDE)
{
bColorKey = TRUE;
dwKeyLow = lpUpdateOverlay->overlayFX.dckDestColorkey.dwColorSpaceLowValue;
dwBlendCtrl |= KeyOnP;
}
if (bColorKey)
{
// We support only destination colour keys:
if (lpDestination->ddpfSurface.dwFlags & DDPF_PALETTEINDEXED8)
{
dwKeyLow = dwGetPaletteEntry(ppdev, dwKeyLow);
}
else if (lpDestination->ddpfSurface.dwFlags & DDPF_RGB)
{
ASSERTDD(lpDestination->ddpfSurface.dwFlags & DDPF_RGB,
"Expected only RGB cases here");
// We have to transform the colour key from its native format
// to 8-8-8:
if (lpDestination->ddpfSurface.dwRGBBitCount == 16)
{
if (IS_RGB15_R(lpDestination->ddpfSurface.dwRBitMask))
dwKeyLow = RGB15to32(dwKeyLow);
else
dwKeyLow = RGB16to32(dwKeyLow);
}
else
{
ASSERTDD((lpDestination->ddpfSurface.dwRGBBitCount == 32),
"Expected the primary surface to be either 8, 16, or 32bpp");
}
}
dwKeyHigh = dwKeyLow;
dwKeyLow |= CompareBits0t7 | KeyFromCompare;
}
// Update and show:
NW_GP_WAIT(ppdev, pjMmBase);
WAIT_FOR_VBLANK(pjIoBase);
WRITE_STREAM_D(pjMmBase, S_0, dwStart);
WRITE_STREAM_D(pjMmBase, S_XY, XY(lpUpdateOverlay->rDest.left,
lpUpdateOverlay->rDest.top));
WRITE_STREAM_D(pjMmBase, S_WH, WH(dstWidth, dstHeight));
WRITE_STREAM_D(pjMmBase, S_STRIDE, dwStride);
WRITE_STREAM_D(pjMmBase, S_CONTROL, dwSecCtrl);
WRITE_STREAM_D(pjMmBase, S_HK1K2, HK1K2(srcWidth, dstWidth));
WRITE_STREAM_D(pjMmBase, S_VK1, VK1(srcHeight));
WRITE_STREAM_D(pjMmBase, S_VK2, VK2(srcHeight, dstHeight));
WRITE_STREAM_D(pjMmBase, S_VDDA, VDDA(dstHeight));
if (bColorKey)
{
WRITE_STREAM_D(pjMmBase, CKEY_LOW, dwKeyLow);
WRITE_STREAM_D(pjMmBase, CKEY_HI, dwKeyHigh);
}
WRITE_STREAM_D(pjMmBase, BLEND_CONTROL, dwBlendCtrl);
WRITE_STREAM_D(pjMmBase, FIFO_CONTROL, ppdev->ulFifoValue);
lpUpdateOverlay->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdSetOverlayPosition
*
\**************************************************************************/
DWORD DdSetOverlayPosition(
PDD_SETOVERLAYPOSITIONDATA lpSetOverlayPosition)
{
PDEV* ppdev;
BYTE* pjIoBase;
BYTE* pjMmBase;
ppdev = (PDEV*) lpSetOverlayPosition->lpDD->dhpdev;
pjIoBase = ppdev->pjIoBase;
pjMmBase = ppdev->pjMmBase;
ASSERTDD(ppdev->flCaps & CAPS_STREAMS_CAPABLE, "Shouldn't have hooked call");
// Check that streams processor is enabled before settting registers
if(ppdev->flStatus & STAT_STREAMS_ENABLED)
{
WAIT_FOR_VBLANK(pjIoBase);
WRITE_STREAM_D(pjMmBase, S_XY, XY(lpSetOverlayPosition->lXPos,
lpSetOverlayPosition->lYPos));
}
lpSetOverlayPosition->ddRVal = DD_OK;
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* DWORD DdGetDriverInfo
*
* This function is an extensible method for returning DirectDraw
* capabilities and methods.
*
\**************************************************************************/
DWORD DdGetDriverInfo(
PDD_GETDRIVERINFODATA lpGetDriverInfo)
{
DWORD dwSize;
lpGetDriverInfo->ddRVal = DDERR_CURRENTLYNOTAVAIL;
if (IsEqualIID(&lpGetDriverInfo->guidInfo, &GUID_NTCallbacks))
{
DD_NTCALLBACKS NtCallbacks;
memset(&NtCallbacks, 0, sizeof(NtCallbacks));
dwSize = min(lpGetDriverInfo->dwExpectedSize, sizeof(DD_NTCALLBACKS));
NtCallbacks.dwSize = dwSize;
NtCallbacks.dwFlags = DDHAL_NTCB32_FREEDRIVERMEMORY;
NtCallbacks.FreeDriverMemory = DdFreeDriverMemory;
memcpy(lpGetDriverInfo->lpvData, &NtCallbacks, dwSize);
lpGetDriverInfo->ddRVal = DD_OK;
}
return(DDHAL_DRIVER_HANDLED);
}
/******************************Public*Routine******************************\
* VOID vAssertModeDirectDraw
*
* This function is called by enable.c when entering or leaving the
* DOS full-screen character mode.
*
\**************************************************************************/
VOID vAssertModeDirectDraw(
PDEV* ppdev,
BOOL bEnable)
{
}
/******************************Public*Routine******************************\
* BOOL bEnableDirectDraw
*
* This function is called by enable.c when the mode is first initialized,
* right after the miniport does the mode-set.
*
\**************************************************************************/
BOOL bEnableDirectDraw(
PDEV* ppdev)
{
BYTE* pjIoBase;
VIDEO_QUERY_STREAMS_MODE VideoQueryStreamsMode;
VIDEO_QUERY_STREAMS_PARAMETERS VideoQueryStreamsParameters;
DWORD ReturnedDataLength;
BOOL bDDrawEnabled=TRUE;
// We're not going to bother to support accelerated DirectDraw on
// those S3s that can't support memory-mapped I/O, simply because
// they're old cards and it's not worth the effort. We also
// require DIRECT_ACCESS to the frame buffer.
//
// We also don't support 864/964 cards because writing to the frame
// buffer can hang the entire system if an accelerated operation is
// going on at the same time.
//
// The 765 (Trio64V+) has a bug such that writing to the frame
// buffer during an accelerator operation may cause a hang if
// you do the write soon enough after starting the blt. (There is
// a small window of opportunity.) On UP machines, the context
// switch time seems to be enough to avoid the problem. However,
// on MP machines, we'll have to disable direct draw.
//
// NOTE: We can identify the 765 since it is the only chip with
// the CAPS_STREAMS_CAPABLE flag.
if (ppdev->flCaps & CAPS_STREAMS_CAPABLE)
{
DWORD numProcessors;
if (EngQuerySystemAttribute(EngNumberOfProcessors, &numProcessors))
{
if (numProcessors != 1)
{
DISPDBG((1, "Disabling DDraw for MP 765 box.\n"));
bDDrawEnabled = FALSE;
}
}
else
{
DISPDBG((1, "Can't determine number of processors, so play it "
"safe and disable DDraw for 765.\n"));
bDDrawEnabled = FALSE;
}
}
// The stretch and YUV bltter capabilities of the S3 868 and 968 were
// disabled to account for bug 135541.
ppdev->flCaps &= ~CAPS_PIXEL_FORMATTER;
if ((ppdev->flCaps & CAPS_NEW_MMIO) &&
!(ppdev->flCaps & CAPS_NO_DIRECT_ACCESS) &&
(bDDrawEnabled))
{
pjIoBase = ppdev->pjIoBase;
// We have to preserve the contents of register 0x69 on the S3's page
// flip:
ACQUIRE_CRTC_CRITICAL_SECTION(ppdev);
OUTP(pjIoBase, CRTC_INDEX, 0x69);
ppdev->ulExtendedSystemControl3Register_69
= (INP(pjIoBase, CRTC_DATA) & 0xe0) << 8;
RELEASE_CRTC_CRITICAL_SECTION(ppdev);
// Accurately measure the refresh rate for later:
vGetDisplayDuration(ppdev);
if (ppdev->flCaps & CAPS_STREAMS_CAPABLE)
{
// Query the miniport to get the correct streams parameters
// for this mode:
VideoQueryStreamsMode.ScreenWidth = ppdev->cxScreen;
VideoQueryStreamsMode.BitsPerPel = ppdev->cBitsPerPel;
VideoQueryStreamsMode.RefreshRate = ppdev->ulRefreshRate;
if (EngDeviceIoControl(ppdev->hDriver,
IOCTL_VIDEO_S3_QUERY_STREAMS_PARAMETERS,
&VideoQueryStreamsMode,
sizeof(VideoQueryStreamsMode),
&VideoQueryStreamsParameters,
sizeof(VideoQueryStreamsParameters),
&ReturnedDataLength))
{
DISPDBG((0, "Miniport reported no streams parameters"));
ppdev->flCaps &= ~CAPS_STREAMS_CAPABLE;
}
else
{
ppdev->ulMinOverlayStretch
= VideoQueryStreamsParameters.MinOverlayStretch;
ppdev->ulFifoValue
= VideoQueryStreamsParameters.FifoValue;
DISPDBG((0, "Refresh rate: %li Minimum overlay stretch: %li.%03li Fifo value: %lx",
ppdev->ulRefreshRate,
ppdev->ulMinOverlayStretch / 1000,
ppdev->ulMinOverlayStretch % 1000,
ppdev->ulFifoValue));
}
}
else if (ppdev->flCaps & CAPS_PIXEL_FORMATTER)
{
// The pixel formatter doesn't work at 24bpp:
if (ppdev->iBitmapFormat != BMF_24BPP)
{
// We'll need a pixel-high scratch area to work around a
// hardware bug for thin stretches:
ppdev->pdsurfVideoEngineScratch = pVidMemAllocate(ppdev,
ppdev->cxMemory,
1);
if (ppdev->pdsurfVideoEngineScratch)
{
if (ppdev->cyMemory * ppdev->lDelta <= 0x100000)
ppdev->dwVEstep = 0x00040004; // If 1MB, 4 bytes/write
else
ppdev->dwVEstep = 0x00080008; // If 2MB, 8 bytes/write
ppdev->flCaps |= CAPS_PIXEL_FORMATTER;
}
}
}
}
return(TRUE);
}
/******************************Public*Routine******************************\
* VOID vDisableDirectDraw
*
* This function is called by enable.c when the driver is shutting down.
*
\**************************************************************************/
VOID vDisableDirectDraw(
PDEV* ppdev)
{
if (ppdev->pdsurfVideoEngineScratch)
{
vVidMemFree(ppdev->pdsurfVideoEngineScratch);
}
}
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