841 lines
24 KiB
C
841 lines
24 KiB
C
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/******************************Module*Header*******************************\
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*
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* *******************
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* * GDI SAMPLE CODE *
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* *******************
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*
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* Module Name: stretch.c
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*
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* Copyright (c) 1993-1998 Microsoft Corporation
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\**************************************************************************/
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#include "precomp.h"
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#define STRETCH_MAX_EXTENT 32767
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typedef DWORDLONG ULONGLONG;
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/******************************Public*Routine******************************\
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*
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* Routine Name
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*
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* vDirectStretch8Narrow
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*
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* Routine Description:
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*
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* Stretch blt 8->8 when the width is 7 or less
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*
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* Arguments:
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*
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* pStrBlt - contains all params for blt
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*
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* Return Value:
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*
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* VOID
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*
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\**************************************************************************/
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VOID vDirectStretch8Narrow(
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STR_BLT* pStrBlt)
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{
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BYTE* pjSrc;
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BYTE* pjDstEnd;
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ULONG ulDst;
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ULONG xAccum;
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ULONG xTmp;
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ULONG yTmp;
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LONG xDst = pStrBlt->XDstStart;
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LONG xSrc = pStrBlt->XSrcStart;
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BYTE* pjSrcScan = pStrBlt->pjSrcScan + xSrc;
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BYTE* pjDst = pStrBlt->pjDstScan + xDst;
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LONG yCount = pStrBlt->YDstCount;
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LONG WidthX = pStrBlt->XDstEnd - xDst;
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ULONG xInt = pStrBlt->ulXDstToSrcIntCeil;
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ULONG xFrac = pStrBlt->ulXDstToSrcFracCeil;
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ULONG yAccum = pStrBlt->ulYFracAccumulator;
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ULONG yFrac = pStrBlt->ulYDstToSrcFracCeil;
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LONG lDstStride = pStrBlt->lDeltaDst - WidthX;
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ULONG yInt = 0;
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yInt = pStrBlt->lDeltaSrc * pStrBlt->ulYDstToSrcIntCeil;
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//
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// Narrow blt
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//
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do {
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ULONG yTmp = yAccum + yFrac;
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BYTE jSrc0;
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BYTE* pjDstEndNarrow = pjDst + WidthX;
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pjSrc = pjSrcScan;
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xAccum = pStrBlt->ulXFracAccumulator;
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do {
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jSrc0 = *pjSrc;
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xTmp = xAccum + xFrac;
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pjSrc = pjSrc + xInt;
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if (xTmp < xAccum)
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pjSrc++;
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*pjDst++ = jSrc0;
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xAccum = xTmp;
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} while (pjDst != pjDstEndNarrow);
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pjSrcScan += yInt;
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if (yTmp < yAccum)
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{
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pjSrcScan += pStrBlt->lDeltaSrc;
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}
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yAccum = yTmp;
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pjDst += lDstStride;
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} while (--yCount);
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}
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/******************************Public*Routine******************************\
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*
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* Routine Name
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*
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* vDirectStretch32
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*
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* Routine Description:
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*
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* Stretch blt 32->32
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*
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* Arguments:
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*
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* pStrBlt - contains all params for blt
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*
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* Return Value:
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*
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* VOID
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*
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\**************************************************************************/
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VOID vDirectStretch32(
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STR_BLT* pStrBlt)
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{
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BYTE* pjOldScan;
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ULONG* pulSrc;
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ULONG* pulDstEnd;
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ULONG ulDst;
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ULONG xAccum;
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ULONG xTmp;
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ULONG yTmp;
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LONG cyDuplicate;
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PDEV* ppdev = pStrBlt->ppdev;
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LONG xDst = pStrBlt->XDstStart;
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LONG xSrc = pStrBlt->XSrcStart;
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BYTE* pjSrcScan = pStrBlt->pjSrcScan + xSrc * 4;
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ULONG* pulDst = (ULONG*)(pStrBlt->pjDstScan) + xDst;
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LONG yDst = pStrBlt->YDstStart + ppdev->yOffset;
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LONG yCount = pStrBlt->YDstCount;
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LONG WidthX = pStrBlt->XDstEnd - xDst;
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ULONG xInt = pStrBlt->ulXDstToSrcIntCeil;
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ULONG xFrac = pStrBlt->ulXDstToSrcFracCeil;
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ULONG yAccum = pStrBlt->ulYFracAccumulator;
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ULONG yFrac = pStrBlt->ulYDstToSrcFracCeil;
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LONG lDstStride = pStrBlt->lDeltaDst - 4*WidthX;
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ULONG yInt = 0;
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//
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// if this is a shrinking blt, calc src scan line stride
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//
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if (pStrBlt->ulYDstToSrcIntCeil != 0)
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{
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yInt = pStrBlt->lDeltaSrc * pStrBlt->ulYDstToSrcIntCeil;
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}
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do {
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ULONG ulSrc;
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ULONG yTmp;
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pulSrc = (ULONG*) pjSrcScan;
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xAccum = pStrBlt->ulXFracAccumulator;
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//
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// a single src scan line is being written
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//
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pulDstEnd = pulDst + WidthX;
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while (pulDst != pulDstEnd)
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{
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ulSrc = *pulSrc;
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xTmp = xAccum + xFrac;
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pulSrc = pulSrc + xInt;
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if (xTmp < xAccum)
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pulSrc++;
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*(ULONG*)pulDst = ulSrc;
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pulDst++;
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xAccum = xTmp;
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}
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pjOldScan = pjSrcScan;
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pjSrcScan += yInt;
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yTmp = yAccum + yFrac;
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if (yTmp < yAccum)
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{
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pjSrcScan += pStrBlt->lDeltaSrc;
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}
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yAccum = yTmp;
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pulDst = (ULONG*) ((BYTE*) pulDst + lDstStride);
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yDst++;
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yCount--;
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if ((yCount != 0) && (pjSrcScan == pjOldScan))
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{
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// It's an expanding stretch in 'y'; the scan we just laid down
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// will be copied at least once using the hardware:
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cyDuplicate = 0;
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do {
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cyDuplicate++;
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pjSrcScan += yInt;
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yTmp = yAccum + yFrac;
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if (yTmp < yAccum)
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{
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pjSrcScan += pStrBlt->lDeltaSrc;
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}
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yAccum = yTmp;
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pulDst = (ULONG*) ((BYTE*) pulDst + pStrBlt->lDeltaDst);
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yCount--;
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} while ((yCount != 0) && (pjSrcScan == pjOldScan));
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// The scan is to be copied 'cyDuplicate' times using the
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// hardware. On the S3, we have to turn off frame-buffer
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// access before touching the accelerator registers:
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ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, BANK_OFF);
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IO_FIFO_WAIT(ppdev, 4);
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IO_MIN_AXIS_PCNT(ppdev, cyDuplicate - 1);
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IO_ABS_DEST_Y(ppdev, yDst);
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IO_ABS_CUR_Y(ppdev, yDst - 1);
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IO_CMD(ppdev, (BITBLT | DRAW | DIR_TYPE_XY | WRITE |
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DRAWING_DIR_TBLRXM));
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yDst += cyDuplicate;
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ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, ppdev->bankmOnOverlapped);
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}
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} while (yCount != 0);
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}
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/******************************Public*Routine******************************\
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*
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* Routine Description:
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*
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* StretchBlt using integer math. Must be from one surface to another
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* surface of the same format.
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*
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* Arguments:
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*
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* ppdev - PDEV for device
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* pvDst - Pointer to start of dst bitmap
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* lDeltaDst - Bytes from start of dst scan line to start of next
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* DstCx - Width of Dst Bitmap in pixels
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* DstCy - Height of Dst Bitmap in pixels
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* prclDst - Pointer to rectangle of Dst extents
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* pvSrc - Pointer to start of Src bitmap
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* lDeltaSrc - Bytes from start of Src scan line to start of next
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* SrcCx - Width of Src Bitmap in pixels
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* SrcCy - Height of Src Bitmap in pixels
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* prclSrc - Pointer to rectangle of Src extents
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* prclSClip - Clip Dest to this rect
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*
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* Return Value:
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*
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* Status
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*
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\**************************************************************************/
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BOOL bStretchDIB(
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PDEV* ppdev,
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VOID* pvDst,
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LONG lDeltaDst,
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RECTL* prclDst,
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VOID* pvSrc,
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LONG lDeltaSrc,
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RECTL* prclSrc,
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RECTL* prclClip)
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{
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STR_BLT StrBlt;
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ULONG XSrcToDstIntFloor;
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ULONG XSrcToDstFracFloor;
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ULONG ulXDstToSrcIntCeil;
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ULONG ulXDstToSrcFracCeil;
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ULONG YSrcToDstIntFloor;
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ULONG YSrcToDstFracFloor;
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ULONG ulYDstToSrcIntCeil;
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ULONG ulYDstToSrcFracCeil;
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LONG SrcIntScan;
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LONG DstDeltaScanEnd;
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ULONG ulXFracAccumulator;
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ULONG ulYFracAccumulator;
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LONG LeftClipDistance;
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LONG TopClipDistance;
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BOOL bStretch;
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union {
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LARGE_INTEGER large;
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ULONGLONG li;
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} liInit;
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PFN_DIRSTRETCH pfnStr;
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//
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// Calculate exclusive start and end points:
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//
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LONG WidthDst = prclDst->right - prclDst->left;
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LONG HeightDst = prclDst->bottom - prclDst->top;
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LONG WidthSrc = prclSrc->right - prclSrc->left;
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LONG HeightSrc = prclSrc->bottom - prclSrc->top;
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LONG XSrcStart = prclSrc->left;
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LONG XSrcEnd = prclSrc->right;
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LONG XDstStart = prclDst->left;
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LONG XDstEnd = prclDst->right;
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LONG YSrcStart = prclSrc->top;
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LONG YSrcEnd = prclSrc->bottom;
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LONG YDstStart = prclDst->top;
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LONG YDstEnd = prclDst->bottom;
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//
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// Validate parameters:
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//
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ASSERTDD(pvDst != (VOID*)NULL, "Bad destination bitmap pointer");
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ASSERTDD(pvSrc != (VOID*)NULL, "Bad source bitmap pointer");
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ASSERTDD(prclDst != (RECTL*)NULL, "Bad destination rectangle");
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ASSERTDD(prclSrc != (RECTL*)NULL, "Bad source rectangle");
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ASSERTDD((WidthDst > 0) && (HeightDst > 0) &&
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(WidthSrc > 0) && (HeightSrc > 0),
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"Can't do mirroring or empty rectangles here");
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ASSERTDD((WidthDst <= STRETCH_MAX_EXTENT) &&
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(HeightDst <= STRETCH_MAX_EXTENT) &&
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(WidthSrc <= STRETCH_MAX_EXTENT) &&
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(HeightSrc <= STRETCH_MAX_EXTENT), "Stretch exceeds limits");
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ASSERTDD(prclClip != NULL, "Bad clip rectangle");
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//
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// Calculate X Dst to Src mapping
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//
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//
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// dst->src = ( CEIL( (2k*WidthSrc)/WidthDst) ) / 2k
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//
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// = ( FLOOR( (2k*WidthSrc -1) / WidthDst) + 1) / 2k
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//
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// where 2k = 2 ^ 32
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//
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{
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ULONGLONG liWidthSrc;
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ULONGLONG liQuo;
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ULONG ulTemp;
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//
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// Work around a compiler bug dealing with the assignment
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// 'liHeightSrc = (((LONGLONG)HeightSrc) << 32) - 1':
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//
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liInit.large.LowPart = (ULONG) -1;
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liInit.large.HighPart = WidthSrc - 1;
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liWidthSrc = liInit.li;
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liQuo = liWidthSrc / (ULONGLONG) WidthDst;
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ulXDstToSrcIntCeil = (ULONG)(liQuo >> 32);
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ulXDstToSrcFracCeil = (ULONG)liQuo;
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//
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// Now add 1, use fake carry:
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//
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ulTemp = ulXDstToSrcFracCeil + 1;
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ulXDstToSrcIntCeil += (ulTemp < ulXDstToSrcFracCeil);
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ulXDstToSrcFracCeil = ulTemp;
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}
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//
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// Calculate Y Dst to Src mapping
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//
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//
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// dst->src = ( CEIL( (2k*HeightSrc)/HeightDst) ) / 2k
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//
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|
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// = ( FLOOR( (2k*HeightSrc -1) / HeightDst) + 1) / 2k
|
||
|
|
//
|
||
|
|
// where 2k = 2 ^ 32
|
||
|
|
//
|
||
|
|
|
||
|
|
{
|
||
|
|
ULONGLONG liHeightSrc;
|
||
|
|
ULONGLONG liQuo;
|
||
|
|
ULONG ulTemp;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Work around a compiler bug dealing with the assignment
|
||
|
|
// 'liHeightSrc = (((LONGLONG)HeightSrc) << 32) - 1':
|
||
|
|
//
|
||
|
|
|
||
|
|
liInit.large.LowPart = (ULONG) -1;
|
||
|
|
liInit.large.HighPart = HeightSrc - 1;
|
||
|
|
liHeightSrc = liInit.li;
|
||
|
|
|
||
|
|
liQuo = liHeightSrc / (ULONGLONG) HeightDst;
|
||
|
|
|
||
|
|
ulYDstToSrcIntCeil = (ULONG)(liQuo >> 32);
|
||
|
|
ulYDstToSrcFracCeil = (ULONG)liQuo;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now add 1, use fake carry:
|
||
|
|
//
|
||
|
|
|
||
|
|
ulTemp = ulYDstToSrcFracCeil + 1;
|
||
|
|
|
||
|
|
ulYDstToSrcIntCeil += (ulTemp < ulYDstToSrcFracCeil);
|
||
|
|
ulYDstToSrcFracCeil = ulTemp;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now clip Dst in X, and/or calc src clipping effect on dst
|
||
|
|
//
|
||
|
|
// adjust left and right edges if needed, record
|
||
|
|
// distance adjusted for fixing the src
|
||
|
|
//
|
||
|
|
|
||
|
|
if (XDstStart < prclClip->left)
|
||
|
|
{
|
||
|
|
XDstStart = prclClip->left;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (XDstEnd > prclClip->right)
|
||
|
|
{
|
||
|
|
XDstEnd = prclClip->right;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Check for totally clipped out destination:
|
||
|
|
//
|
||
|
|
|
||
|
|
if (XDstEnd <= XDstStart)
|
||
|
|
{
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
LeftClipDistance = XDstStart - prclDst->left;
|
||
|
|
|
||
|
|
{
|
||
|
|
ULONG ulTempInt;
|
||
|
|
ULONG ulTempFrac;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Calculate displacement for .5 in destination and add:
|
||
|
|
//
|
||
|
|
|
||
|
|
ulTempFrac = (ulXDstToSrcFracCeil >> 1) | (ulXDstToSrcIntCeil << 31);
|
||
|
|
ulTempInt = (ulXDstToSrcIntCeil >> 1);
|
||
|
|
|
||
|
|
XSrcStart += ulTempInt;
|
||
|
|
ulXFracAccumulator = ulTempFrac;
|
||
|
|
|
||
|
|
if (LeftClipDistance != 0)
|
||
|
|
{
|
||
|
|
ULONGLONG ullFraction;
|
||
|
|
ULONG ulTmp;
|
||
|
|
|
||
|
|
ullFraction = UInt32x32To64(ulXDstToSrcFracCeil, LeftClipDistance);
|
||
|
|
|
||
|
|
ulTmp = ulXFracAccumulator;
|
||
|
|
ulXFracAccumulator += (ULONG) (ullFraction);
|
||
|
|
if (ulXFracAccumulator < ulTmp)
|
||
|
|
XSrcStart++;
|
||
|
|
|
||
|
|
XSrcStart += (ulXDstToSrcIntCeil * LeftClipDistance)
|
||
|
|
+ (ULONG) (ullFraction >> 32);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Now clip Dst in Y, and/or calc src clipping effect on dst
|
||
|
|
//
|
||
|
|
// adjust top and bottom edges if needed, record
|
||
|
|
// distance adjusted for fixing the src
|
||
|
|
//
|
||
|
|
|
||
|
|
if (YDstStart < prclClip->top)
|
||
|
|
{
|
||
|
|
YDstStart = prclClip->top;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (YDstEnd > prclClip->bottom)
|
||
|
|
{
|
||
|
|
YDstEnd = prclClip->bottom;
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Check for totally clipped out destination:
|
||
|
|
//
|
||
|
|
|
||
|
|
if (YDstEnd <= YDstStart)
|
||
|
|
{
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
TopClipDistance = YDstStart - prclDst->top;
|
||
|
|
|
||
|
|
{
|
||
|
|
ULONG ulTempInt;
|
||
|
|
ULONG ulTempFrac;
|
||
|
|
|
||
|
|
//
|
||
|
|
// Calculate displacement for .5 in destination and add:
|
||
|
|
//
|
||
|
|
|
||
|
|
ulTempFrac = (ulYDstToSrcFracCeil >> 1) | (ulYDstToSrcIntCeil << 31);
|
||
|
|
ulTempInt = ulYDstToSrcIntCeil >> 1;
|
||
|
|
|
||
|
|
YSrcStart += (LONG)ulTempInt;
|
||
|
|
ulYFracAccumulator = ulTempFrac;
|
||
|
|
|
||
|
|
if (TopClipDistance != 0)
|
||
|
|
{
|
||
|
|
ULONGLONG ullFraction;
|
||
|
|
ULONG ulTmp;
|
||
|
|
|
||
|
|
ullFraction = UInt32x32To64(ulYDstToSrcFracCeil, TopClipDistance);
|
||
|
|
|
||
|
|
ulTmp = ulYFracAccumulator;
|
||
|
|
ulYFracAccumulator += (ULONG) (ullFraction);
|
||
|
|
if (ulYFracAccumulator < ulTmp)
|
||
|
|
YSrcStart++;
|
||
|
|
|
||
|
|
YSrcStart += (ulYDstToSrcIntCeil * TopClipDistance)
|
||
|
|
+ (ULONG) (ullFraction >> 32);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Warm up the hardware if doing an expanding stretch in 'y':
|
||
|
|
//
|
||
|
|
|
||
|
|
bStretch = (HeightDst > HeightSrc);
|
||
|
|
if (bStretch)
|
||
|
|
{
|
||
|
|
LONG x;
|
||
|
|
|
||
|
|
//
|
||
|
|
// We'll be banging on the CRTC registers whenever we enable
|
||
|
|
// and disable direct frame buffer access; we can't have the
|
||
|
|
// cursor thread banging on them at the same. So we grab the
|
||
|
|
// CRTC critical section for the duration of the StretchBlt.
|
||
|
|
//
|
||
|
|
// Note that this CRTC critical section problem and the bank
|
||
|
|
// mode selection logic are rather S3 specific -- other video
|
||
|
|
// cards shouldn't have to worry about this.
|
||
|
|
//
|
||
|
|
|
||
|
|
ACQUIRE_CRTC_CRITICAL_SECTION(ppdev);
|
||
|
|
|
||
|
|
//
|
||
|
|
// Set up the left and right blt edges, since they never change
|
||
|
|
// during the StretchBlt
|
||
|
|
//
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, BANK_OFF);
|
||
|
|
|
||
|
|
IO_FIFO_WAIT(ppdev, 5);
|
||
|
|
IO_FRGD_MIX(ppdev, SRC_DISPLAY_MEMORY | OVERPAINT);
|
||
|
|
IO_PIX_CNTL(ppdev, ALL_ONES);
|
||
|
|
IO_CUR_X(ppdev, XDstStart);
|
||
|
|
IO_DEST_X(ppdev, XDstStart);
|
||
|
|
IO_MAJ_AXIS_PCNT(ppdev, XDstEnd - XDstStart - 1);
|
||
|
|
|
||
|
|
ppdev->pfnBankSelectMode(ppdev, ppdev->pvBankData, ppdev->bankmOnOverlapped);
|
||
|
|
}
|
||
|
|
|
||
|
|
//
|
||
|
|
// Fill out blt structure, then call format-specific stretch code
|
||
|
|
//
|
||
|
|
|
||
|
|
StrBlt.ppdev = ppdev;
|
||
|
|
StrBlt.XDstEnd = XDstEnd;
|
||
|
|
StrBlt.YDstStart = YDstStart;
|
||
|
|
StrBlt.YDstCount = YDstEnd - YDstStart;
|
||
|
|
|
||
|
|
if (StrBlt.YDstCount > 0)
|
||
|
|
{
|
||
|
|
//
|
||
|
|
// Caclulate starting scan line address. Since the inner loop
|
||
|
|
// routines are format dependent, they must add XDstStart/XSrcStart
|
||
|
|
// to pjDstScan/pjSrcScan to get the actual starting pixel address.
|
||
|
|
//
|
||
|
|
|
||
|
|
StrBlt.pjSrcScan = (BYTE*) pvSrc + (YSrcStart * lDeltaSrc);
|
||
|
|
StrBlt.pjDstScan = (BYTE*) pvDst + (YDstStart * lDeltaDst);
|
||
|
|
|
||
|
|
StrBlt.lDeltaSrc = lDeltaSrc;
|
||
|
|
StrBlt.XSrcStart = XSrcStart;
|
||
|
|
StrBlt.XDstStart = XDstStart;
|
||
|
|
StrBlt.lDeltaDst = lDeltaDst;
|
||
|
|
StrBlt.ulXDstToSrcIntCeil = ulXDstToSrcIntCeil;
|
||
|
|
StrBlt.ulXDstToSrcFracCeil = ulXDstToSrcFracCeil;
|
||
|
|
StrBlt.ulYDstToSrcIntCeil = ulYDstToSrcIntCeil;
|
||
|
|
StrBlt.ulYDstToSrcFracCeil = ulYDstToSrcFracCeil;
|
||
|
|
StrBlt.ulXFracAccumulator = ulXFracAccumulator;
|
||
|
|
StrBlt.ulYFracAccumulator = ulYFracAccumulator;
|
||
|
|
|
||
|
|
if (ppdev->iBitmapFormat == BMF_8BPP)
|
||
|
|
{
|
||
|
|
if ((XDstEnd - XDstStart) < 7)
|
||
|
|
pfnStr = vDirectStretch8Narrow;
|
||
|
|
else
|
||
|
|
pfnStr = vDirectStretch8;
|
||
|
|
}
|
||
|
|
else if (ppdev->iBitmapFormat == BMF_16BPP)
|
||
|
|
{
|
||
|
|
pfnStr = vDirectStretch16;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
ASSERTDD(ppdev->iBitmapFormat == BMF_32BPP,
|
||
|
|
"Only handle stretchs at 8, 16 and 32bpp");
|
||
|
|
|
||
|
|
pfnStr = vDirectStretch32;
|
||
|
|
}
|
||
|
|
|
||
|
|
(*pfnStr)(&StrBlt);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (bStretch)
|
||
|
|
{
|
||
|
|
RELEASE_CRTC_CRITICAL_SECTION(ppdev);
|
||
|
|
}
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
|
||
|
|
/******************************Public*Routine******************************\
|
||
|
|
* BOOL bBankedStretch
|
||
|
|
*
|
||
|
|
\**************************************************************************/
|
||
|
|
|
||
|
|
BOOL bBankedStretch(
|
||
|
|
PDEV* ppdev,
|
||
|
|
VOID* pvDst,
|
||
|
|
LONG lDeltaDst,
|
||
|
|
RECTL* prclDst,
|
||
|
|
VOID* pvSrc,
|
||
|
|
LONG lDeltaSrc,
|
||
|
|
RECTL* prclSrc,
|
||
|
|
RECTL* prclClip)
|
||
|
|
{
|
||
|
|
BANK bnk;
|
||
|
|
BOOL b;
|
||
|
|
RECTL rclDst;
|
||
|
|
|
||
|
|
b = TRUE;
|
||
|
|
if (bIntersect(prclDst, prclClip, &rclDst))
|
||
|
|
{
|
||
|
|
vBankStart(ppdev, &rclDst, NULL, &bnk);
|
||
|
|
|
||
|
|
do {
|
||
|
|
b &= bStretchDIB(ppdev,
|
||
|
|
bnk.pso->pvScan0,
|
||
|
|
lDeltaDst,
|
||
|
|
prclDst,
|
||
|
|
pvSrc,
|
||
|
|
lDeltaSrc,
|
||
|
|
prclSrc,
|
||
|
|
&bnk.pco->rclBounds);
|
||
|
|
|
||
|
|
} while (bBankEnum(&bnk));
|
||
|
|
}
|
||
|
|
|
||
|
|
return(b);
|
||
|
|
}
|
||
|
|
|
||
|
|
/******************************Public*Routine******************************\
|
||
|
|
* BOOL DrvStretchBlt
|
||
|
|
*
|
||
|
|
\**************************************************************************/
|
||
|
|
|
||
|
|
BOOL DrvStretchBlt(
|
||
|
|
SURFOBJ* psoDst,
|
||
|
|
SURFOBJ* psoSrc,
|
||
|
|
SURFOBJ* psoMsk,
|
||
|
|
CLIPOBJ* pco,
|
||
|
|
XLATEOBJ* pxlo,
|
||
|
|
COLORADJUSTMENT* pca,
|
||
|
|
POINTL* pptlHTOrg,
|
||
|
|
RECTL* prclDst,
|
||
|
|
RECTL* prclSrc,
|
||
|
|
POINTL* pptlMsk,
|
||
|
|
ULONG iMode)
|
||
|
|
{
|
||
|
|
DSURF* pdsurfSrc;
|
||
|
|
DSURF* pdsurfDst;
|
||
|
|
PDEV* ppdev;
|
||
|
|
|
||
|
|
// GDI guarantees us that for a StretchBlt the destination surface
|
||
|
|
// will always be a device surface, and not a DIB:
|
||
|
|
|
||
|
|
ppdev = (PDEV*) psoDst->dhpdev;
|
||
|
|
|
||
|
|
// It's quicker for GDI to do a StretchBlt when the source surface
|
||
|
|
// is not a device-managed surface, because then it can directly
|
||
|
|
// read the source bits without having to allocate a temporary
|
||
|
|
// buffer and call DrvCopyBits to get a copy that it can use.
|
||
|
|
|
||
|
|
if (psoSrc->iType == STYPE_DEVBITMAP)
|
||
|
|
{
|
||
|
|
goto Punt_It;
|
||
|
|
}
|
||
|
|
|
||
|
|
pdsurfDst = (DSURF*) psoDst->dhsurf;
|
||
|
|
ASSERTDD(!(pdsurfDst->dt & DT_DIB), "Didn't expect DT_DIB");
|
||
|
|
|
||
|
|
ppdev->xOffset = pdsurfDst->x;
|
||
|
|
ppdev->yOffset = pdsurfDst->y;
|
||
|
|
|
||
|
|
// Our special-case StretchBlt code assumes a dense frame buffer
|
||
|
|
// space, so this code can't be executed when using sparse space
|
||
|
|
// on the Alpha. Note that since we don't read from the frame
|
||
|
|
// buffer, we can allow this to go through even when
|
||
|
|
// CAPS_NO_DIRECT_ACCESS is set on the PPC.
|
||
|
|
|
||
|
|
if (DENSE(ppdev))
|
||
|
|
{
|
||
|
|
RECTL rclClip;
|
||
|
|
RECTL* prclClip;
|
||
|
|
ULONG cxDst;
|
||
|
|
ULONG cyDst;
|
||
|
|
ULONG cxSrc;
|
||
|
|
ULONG cySrc;
|
||
|
|
BOOL bMore;
|
||
|
|
CLIPENUM ce;
|
||
|
|
LONG c;
|
||
|
|
LONG i;
|
||
|
|
|
||
|
|
if ((psoSrc->iType == STYPE_BITMAP) &&
|
||
|
|
(psoMsk == NULL) &&
|
||
|
|
((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL)) &&
|
||
|
|
((psoSrc->iBitmapFormat == ppdev->iBitmapFormat)) &&
|
||
|
|
(ppdev->iBitmapFormat != BMF_24BPP))
|
||
|
|
{
|
||
|
|
cxDst = prclDst->right - prclDst->left;
|
||
|
|
cyDst = prclDst->bottom - prclDst->top;
|
||
|
|
cxSrc = prclSrc->right - prclSrc->left;
|
||
|
|
cySrc = prclSrc->bottom - prclSrc->top;
|
||
|
|
|
||
|
|
// Our 'bStretchDIB' routine requires that the stretch be
|
||
|
|
// non-inverting, within a certain size, to have no source
|
||
|
|
// clipping, and to have no empty rectangles (the latter is the
|
||
|
|
// reason for the '- 1' on the unsigned compare here):
|
||
|
|
|
||
|
|
if (((cxSrc - 1) < STRETCH_MAX_EXTENT) &&
|
||
|
|
((cySrc - 1) < STRETCH_MAX_EXTENT) &&
|
||
|
|
((cxDst - 1) < STRETCH_MAX_EXTENT) &&
|
||
|
|
((cyDst - 1) < STRETCH_MAX_EXTENT) &&
|
||
|
|
(prclSrc->left >= 0) &&
|
||
|
|
(prclSrc->top >= 0) &&
|
||
|
|
(prclSrc->right <= psoSrc->sizlBitmap.cx) &&
|
||
|
|
(prclSrc->bottom <= psoSrc->sizlBitmap.cy))
|
||
|
|
{
|
||
|
|
// Our snazzy routine only does COLORONCOLOR. But for
|
||
|
|
// stretching blts, BLACKONWHITE and WHITEONBLACK are also
|
||
|
|
// equivalent to COLORONCOLOR:
|
||
|
|
|
||
|
|
if ((iMode == COLORONCOLOR) ||
|
||
|
|
((iMode < COLORONCOLOR) && (cxSrc <= cxDst) && (cySrc <= cyDst)))
|
||
|
|
{
|
||
|
|
if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL))
|
||
|
|
{
|
||
|
|
rclClip.left = LONG_MIN;
|
||
|
|
rclClip.top = LONG_MIN;
|
||
|
|
rclClip.right = LONG_MAX;
|
||
|
|
rclClip.bottom = LONG_MAX;
|
||
|
|
prclClip = &rclClip;
|
||
|
|
|
||
|
|
StretchSingleClipRect:
|
||
|
|
|
||
|
|
if (bBankedStretch(ppdev,
|
||
|
|
NULL,
|
||
|
|
ppdev->lDelta,
|
||
|
|
prclDst,
|
||
|
|
psoSrc->pvScan0,
|
||
|
|
psoSrc->lDelta,
|
||
|
|
prclSrc,
|
||
|
|
prclClip))
|
||
|
|
{
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (pco->iDComplexity == DC_RECT)
|
||
|
|
{
|
||
|
|
prclClip = &pco->rclBounds;
|
||
|
|
goto StretchSingleClipRect;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES, CD_ANY, 0);
|
||
|
|
|
||
|
|
do {
|
||
|
|
bMore = CLIPOBJ_bEnum(pco, sizeof(ce), (ULONG*) &ce);
|
||
|
|
|
||
|
|
c = cIntersect(prclDst, ce.arcl, ce.c);
|
||
|
|
|
||
|
|
if (c != 0)
|
||
|
|
{
|
||
|
|
for (i = 0; i < c; i++)
|
||
|
|
{
|
||
|
|
if (!bBankedStretch(ppdev,
|
||
|
|
NULL,
|
||
|
|
ppdev->lDelta,
|
||
|
|
prclDst,
|
||
|
|
psoSrc->pvScan0,
|
||
|
|
psoSrc->lDelta,
|
||
|
|
prclSrc,
|
||
|
|
&ce.arcl[i]))
|
||
|
|
{
|
||
|
|
goto Punt_It;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} while (bMore);
|
||
|
|
|
||
|
|
return(TRUE);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
Punt_It:
|
||
|
|
|
||
|
|
// GDI is nice enough to handle the cases where 'psoDst' and/or 'psoSrc'
|
||
|
|
// are device-managed surfaces, but it ain't gonna be fast...
|
||
|
|
|
||
|
|
return(EngStretchBlt(psoDst, psoSrc, psoMsk, pco, pxlo, pca, pptlHTOrg,
|
||
|
|
prclDst, prclSrc, pptlMsk, iMode));
|
||
|
|
}
|