421 lines
11 KiB
C
421 lines
11 KiB
C
|
/******************************Module*Header*******************************\
|
||
|
|
*
|
||
|
|
* *******************
|
||
|
|
* * GDI SAMPLE CODE *
|
||
|
|
* *******************
|
||
|
|
*
|
||
|
|
* Module Name: str.c
|
||
|
|
*
|
||
|
|
* Contains the 'C' versions of some inner-loop routines for the
|
||
|
|
* partially hardware accelerated StretchBlt.
|
||
|
|
*
|
||
|
|
* Copyright (c) 1993-1998 Microsoft Corporation
|
||
|
|
\**************************************************************************/
|
||
|
|
#include "precomp.h"
|
||
|
|
|
||
|
|
/******************************Public*Routine******************************\
|
||
|
|
*
|
||
|
|
* Routine Name
|
||
|
|
*
|
||
|
|
* vDirectStretch8
|
||
|
|
*
|
||
|
|
* Routine Description:
|
||
|
|
*
|
||
|
|
* Stretch blt 8->8
|
||
|
|
*
|
||
|
|
* NOTE: This routine doesn't handle cases where the blt stretch starts
|
||
|
|
* and ends in the same destination dword! vDirectStretchNarrow
|
||
|
|
* is expected to have been called for that case.
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
*
|
||
|
|
* pStrBlt - contains all params for blt
|
||
|
|
*
|
||
|
|
* Return Value:
|
||
|
|
*
|
||
|
|
* VOID
|
||
|
|
*
|
||
|
|
\**************************************************************************/
|
||
|
|
|
||
|
|
VOID vDirectStretch8(
|
||
|
|
STR_BLT* pStrBlt)
|
||
|
|
{
|
||
|
|
BYTE* pjSrc;
|
||
|
|
BYTE* pjDstEnd;
|
||
|
|
LONG WidthXAln;
|
||
|
|
ULONG ulDst;
|
||
|
|
ULONG xAccum;
|
||
|
|
ULONG xTmp;
|
||
|
|
ULONG yTmp;
|
||
|
|
BYTE* pjOldScan;
|
||
|
|
LONG cyDuplicate;
|
||
|
|
|
||
|
|
PDEV* ppdev = pStrBlt->ppdev;
|
||
|
|
LONG xDst = pStrBlt->XDstStart;
|
||
|
|
LONG xSrc = pStrBlt->XSrcStart;
|
||
|
|
BYTE* pjSrcScan = pStrBlt->pjSrcScan + xSrc;
|
||
|
|
BYTE* pjDst = pStrBlt->pjDstScan + xDst;
|
||
|
|
LONG yDst = pStrBlt->YDstStart + ppdev->yOffset;
|
||
|
|
LONG yCount = pStrBlt->YDstCount;
|
||
|
|
ULONG StartAln = (ULONG)((ULONG_PTR)pjDst & 0x03);
|
||
|
|
LONG WidthX = pStrBlt->XDstEnd - xDst;
|
||
|
|
ULONG EndAln = (ULONG)((ULONG_PTR)(pjDst + WidthX) & 0x03);
|
||
|
|
ULONG xInt = pStrBlt->ulXDstToSrcIntCeil;
|
||
|
|
ULONG xFrac = pStrBlt->ulXDstToSrcFracCeil;
|
||
|
|
ULONG yAccum = pStrBlt->ulYFracAccumulator;
|
||
|
|
ULONG yFrac = pStrBlt->ulYDstToSrcFracCeil;
|
||
|
|
ULONG yInt = 0;
|
||
|
|
LONG lDstStride = pStrBlt->lDeltaDst - WidthX;
|
||
|
|
|
||
|
|
WidthXAln = WidthX - EndAln - ((- (LONG) StartAln) & 0x03);
|
||
|
|
|
||
|
|
//
|
||
|
|
// if this is a shrinking blt, calc src scan line stride
|
||
|
|
//
|
||
|
|
|
||
|
|
if (pStrBlt->ulYDstToSrcIntCeil != 0)
|
||
|
|
{
|
||
|
|
yInt = pStrBlt->lDeltaSrc * pStrBlt->ulYDstToSrcIntCeil;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// loop drawing each scan line
|
||
|
|
//
|
||
|
|
//
|
||
|
|
// at least 7 wide (DST) blt
|
||
|
|
//
|
||
|
|
|
||
|
|
do {
|
||
|
|
BYTE jSrc0,jSrc1,jSrc2,jSrc3;
|
||
|
|
ULONG yTmp;
|
||
|
|
|
||
|
|
pjSrc = pjSrcScan;
|
||
|
|
xAccum = pStrBlt->ulXFracAccumulator;
|
||
|
|
|
||
|
|
//
|
||
|
|
// a single src scan line is being written
|
||
|
|
//
|
||
|
|
|
||
|
|
switch (StartAln) {
|
||
|
|
case 1:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
case 2:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
case 3:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
pjDstEnd = pjDst + WidthXAln;
|
||
|
|
|
||
|
|
while (pjDst != pjDstEnd)
|
||
|
|
{
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
jSrc1 = *pjSrc;
|
||
|
|
xAccum = xTmp + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xAccum < xTmp)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
jSrc2 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
jSrc3 = *pjSrc;
|
||
|
|
xAccum = xTmp + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xAccum < xTmp)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
ulDst = (jSrc3 << 24) | (jSrc2 << 16) | (jSrc1 << 8) | jSrc0;
|
||
|
|
|
||
|
|
*(PULONG)pjDst = ulDst;
|
||
|
|
pjDst += 4;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (EndAln) {
|
||
|
|
case 3:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
case 2:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
case 1:
|
||
|
|
jSrc0 = *pjSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pjSrc = pjSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pjSrc++;
|
||
|
|
|
||
|
|
*pjDst++ = jSrc0;
|
||
|
|
}
|
||
|
|
|
||
|
|
pjOldScan = pjSrcScan;
|
||
|
|
pjSrcScan += yInt;
|
||
|
|
|
||
|
|
yTmp = yAccum + yFrac;
|
||
|
|
if (yTmp < yAccum)
|
||
|
|
{
|
||
|
|
pjSrcScan += pStrBlt->lDeltaSrc;
|
||
|
|
}
|
||
|
|
yAccum = yTmp;
|
||
|
|
|
||
|
|
pjDst = (pjDst + lDstStride);
|
||
|
|
yDst++;
|
||
|
|
yCount--;
|
||
|
|
|
||
|
|
if ((yCount != 0) && (pjSrcScan == pjOldScan))
|
||
|
|
{
|
||
|
|
// It's an expanding stretch in 'y'; the scan we just laid down
|
||
|
|
// will be copied at least once using the hardware:
|
||
|
|
|
||
|
|
cyDuplicate = 0;
|
||
|
|
do {
|
||
|
|
cyDuplicate++;
|
||
|
|
pjSrcScan += yInt;
|
||
|
|
|
||
|
|
yTmp = yAccum + yFrac;
|
||
|
|
if (yTmp < yAccum)
|
||
|
|
{
|
||
|
|
pjSrcScan += pStrBlt->lDeltaSrc;
|
||
|
|
}
|
||
|
|
yAccum = yTmp;
|
||
|
|
|
||
|
|
pjDst = (pjDst + pStrBlt->lDeltaDst);
|
||
|
|
yCount--;
|
||
|
|
|
||
|
|
} while ((yCount != 0) && (pjSrcScan == pjOldScan));
|
||
|
|
|
||
|
|
// The scan is to be copied 'cyDuplicate' times using the
|
||
|
|
// hardware. On the S3, we have to turn off frame-buffer
|
||
|
|
// access before touching the accelerator registers:
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, BANK_OFF);
|
||
|
|
|
||
|
|
IO_FIFO_WAIT(ppdev, 4);
|
||
|
|
IO_MIN_AXIS_PCNT(ppdev, cyDuplicate - 1);
|
||
|
|
IO_ABS_DEST_Y(ppdev, yDst);
|
||
|
|
IO_ABS_CUR_Y(ppdev, yDst - 1);
|
||
|
|
IO_CMD(ppdev, (BITBLT | DRAW | DIR_TYPE_XY | WRITE |
|
||
|
|
DRAWING_DIR_TBLRXM));
|
||
|
|
|
||
|
|
yDst += cyDuplicate;
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, ppdev->bankmOnOverlapped);
|
||
|
|
}
|
||
|
|
} while (yCount != 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
/******************************Public*Routine******************************\
|
||
|
|
*
|
||
|
|
* Routine Name
|
||
|
|
*
|
||
|
|
* vDirectStretch16
|
||
|
|
*
|
||
|
|
* Routine Description:
|
||
|
|
*
|
||
|
|
* Stretch blt 16->16
|
||
|
|
*
|
||
|
|
* Arguments:
|
||
|
|
*
|
||
|
|
* pStrBlt - contains all params for blt
|
||
|
|
*
|
||
|
|
* Return Value:
|
||
|
|
*
|
||
|
|
* VOID
|
||
|
|
*
|
||
|
|
\**************************************************************************/
|
||
|
|
|
||
|
|
VOID vDirectStretch16(
|
||
|
|
STR_BLT* pStrBlt)
|
||
|
|
{
|
||
|
|
BYTE* pjOldScan;
|
||
|
|
USHORT* pusSrc;
|
||
|
|
USHORT* pusDstEnd;
|
||
|
|
LONG WidthXAln;
|
||
|
|
ULONG ulDst;
|
||
|
|
ULONG xAccum;
|
||
|
|
ULONG xTmp;
|
||
|
|
ULONG yTmp;
|
||
|
|
LONG cyDuplicate;
|
||
|
|
|
||
|
|
PDEV* ppdev = pStrBlt->ppdev;
|
||
|
|
LONG xDst = pStrBlt->XDstStart;
|
||
|
|
LONG xSrc = pStrBlt->XSrcStart;
|
||
|
|
BYTE* pjSrcScan = (pStrBlt->pjSrcScan) + xSrc * 2;
|
||
|
|
USHORT* pusDst = (USHORT*)(pStrBlt->pjDstScan) + xDst;
|
||
|
|
LONG yDst = pStrBlt->YDstStart + ppdev->yOffset;
|
||
|
|
LONG yCount = pStrBlt->YDstCount;
|
||
|
|
ULONG StartAln = (ULONG)(((ULONG_PTR)pusDst & 0x02) >> 1);
|
||
|
|
LONG WidthX = pStrBlt->XDstEnd - xDst;
|
||
|
|
ULONG EndAln = (ULONG)(((ULONG_PTR)(pusDst + WidthX) & 0x02) >> 1);
|
||
|
|
ULONG xInt = pStrBlt->ulXDstToSrcIntCeil;
|
||
|
|
ULONG xFrac = pStrBlt->ulXDstToSrcFracCeil;
|
||
|
|
ULONG yAccum = pStrBlt->ulYFracAccumulator;
|
||
|
|
ULONG yFrac = pStrBlt->ulYDstToSrcFracCeil;
|
||
|
|
LONG lDstStride = pStrBlt->lDeltaDst - 2 * WidthX;
|
||
|
|
ULONG yInt = 0;
|
||
|
|
|
||
|
|
WidthXAln = WidthX - EndAln - StartAln;
|
||
|
|
|
||
|
|
//
|
||
|
|
// if this is a shrinking blt, calc src scan line stride
|
||
|
|
//
|
||
|
|
|
||
|
|
if (pStrBlt->ulYDstToSrcIntCeil != 0)
|
||
|
|
{
|
||
|
|
yInt = pStrBlt->lDeltaSrc * pStrBlt->ulYDstToSrcIntCeil;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Loop stretching each scan line
|
||
|
|
|
||
|
|
do {
|
||
|
|
USHORT usSrc0,usSrc1;
|
||
|
|
ULONG yTmp;
|
||
|
|
|
||
|
|
pusSrc = (USHORT*) pjSrcScan;
|
||
|
|
xAccum = pStrBlt->ulXFracAccumulator;
|
||
|
|
|
||
|
|
// A single source scan line is being written:
|
||
|
|
|
||
|
|
if (StartAln)
|
||
|
|
{
|
||
|
|
usSrc0 = *pusSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pusSrc = pusSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pusSrc++;
|
||
|
|
|
||
|
|
*pusDst++ = usSrc0;
|
||
|
|
xAccum = xTmp;
|
||
|
|
}
|
||
|
|
|
||
|
|
pusDstEnd = pusDst + WidthXAln;
|
||
|
|
|
||
|
|
while (pusDst != pusDstEnd)
|
||
|
|
{
|
||
|
|
|
||
|
|
usSrc0 = *pusSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pusSrc = pusSrc + xInt;
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pusSrc++;
|
||
|
|
|
||
|
|
usSrc1 = *pusSrc;
|
||
|
|
xAccum = xTmp + xFrac;
|
||
|
|
pusSrc = pusSrc + xInt;
|
||
|
|
if (xAccum < xTmp)
|
||
|
|
pusSrc++;
|
||
|
|
|
||
|
|
ulDst = (ULONG)((usSrc1 << 16) | usSrc0);
|
||
|
|
|
||
|
|
*(ULONG*)pusDst = ulDst;
|
||
|
|
pusDst+=2;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (EndAln)
|
||
|
|
{
|
||
|
|
usSrc0 = *pusSrc;
|
||
|
|
xTmp = xAccum + xFrac;
|
||
|
|
pusSrc = pusSrc + xInt; // Is this really needed?
|
||
|
|
if (xTmp < xAccum)
|
||
|
|
pusSrc++;
|
||
|
|
|
||
|
|
*pusDst++ = usSrc0;
|
||
|
|
}
|
||
|
|
|
||
|
|
pjOldScan = pjSrcScan;
|
||
|
|
pjSrcScan += yInt;
|
||
|
|
|
||
|
|
yTmp = yAccum + yFrac;
|
||
|
|
if (yTmp < yAccum)
|
||
|
|
{
|
||
|
|
pjSrcScan += pStrBlt->lDeltaSrc;
|
||
|
|
}
|
||
|
|
yAccum = yTmp;
|
||
|
|
|
||
|
|
pusDst = (USHORT*) ((BYTE*) pusDst + lDstStride);
|
||
|
|
yDst++;
|
||
|
|
yCount--;
|
||
|
|
|
||
|
|
if ((yCount != 0) && (pjSrcScan == pjOldScan))
|
||
|
|
{
|
||
|
|
// It's an expanding stretch in 'y'; the scan we just laid down
|
||
|
|
// will be copied at least once using the hardware:
|
||
|
|
|
||
|
|
cyDuplicate = 0;
|
||
|
|
do {
|
||
|
|
cyDuplicate++;
|
||
|
|
pjSrcScan += yInt;
|
||
|
|
|
||
|
|
yTmp = yAccum + yFrac;
|
||
|
|
if (yTmp < yAccum)
|
||
|
|
{
|
||
|
|
pjSrcScan += pStrBlt->lDeltaSrc;
|
||
|
|
}
|
||
|
|
yAccum = yTmp;
|
||
|
|
|
||
|
|
pusDst = (USHORT*) ((BYTE*) pusDst + pStrBlt->lDeltaDst);
|
||
|
|
yCount--;
|
||
|
|
|
||
|
|
} while ((yCount != 0) && (pjSrcScan == pjOldScan));
|
||
|
|
|
||
|
|
// The scan is to be copied 'cyDuplicate' times using the
|
||
|
|
// hardware. On the S3, we have to turn off frame-buffer
|
||
|
|
// access before touching the accelerator registers:
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, BANK_OFF);
|
||
|
|
|
||
|
|
IO_FIFO_WAIT(ppdev, 4);
|
||
|
|
IO_MIN_AXIS_PCNT(ppdev, cyDuplicate - 1);
|
||
|
|
IO_ABS_DEST_Y(ppdev, yDst);
|
||
|
|
IO_ABS_CUR_Y(ppdev, yDst - 1);
|
||
|
|
IO_CMD(ppdev, (BITBLT | DRAW | DIR_TYPE_XY | WRITE |
|
||
|
|
DRAWING_DIR_TBLRXM));
|
||
|
|
|
||
|
|
yDst += cyDuplicate;
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, ppdev->bankmOnOverlapped);
|
||
|
|
}
|
||
|
|
} while (yCount != 0);
|
||
|
|
}
|