131 lines
4.1 KiB
C
131 lines
4.1 KiB
C
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/******************************Module*Header*******************************\
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* Module Name: stretch.c
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*
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* Copyright (c) 1993-1994 Microsoft Corporation
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\**************************************************************************/
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#include "precomp.h"
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/******************************Public*Routine******************************\
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* BOOL DrvStretchBlt
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*
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\**************************************************************************/
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BOOL DrvStretchBlt(
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SURFOBJ* psoDst,
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SURFOBJ* psoSrc,
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SURFOBJ* psoMsk,
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CLIPOBJ* pco,
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XLATEOBJ* pxlo,
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COLORADJUSTMENT* pca,
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POINTL* pptlHTOrg,
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RECTL* prclDst,
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RECTL* prclSrc,
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POINTL* pptlMsk,
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ULONG iMode)
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{
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DSURF* pdsurfSrc;
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DSURF* pdsurfDst;
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PDEV* ppdev;
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ppdev = (PDEV*) psoDst->dhpdev;
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// It's quicker for GDI to do a StretchBlt when the source surface
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// is not a device-managed surface, because then it can directly
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// read the source bits without having to allocate a temporary
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// buffer and call DrvCopyBits to get a copy that it can use.
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//
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// So if the source is one of our off-screen DFBs, we'll immediately
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// and permanently convert it to a DIB:
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if (psoSrc->iType == STYPE_DEVBITMAP)
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{
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pdsurfSrc = (DSURF*) psoSrc->dhsurf;
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if (pdsurfSrc->dt == DT_SCREEN)
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{
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if (!pohMoveOffscreenDfbToDib(ppdev, pdsurfSrc->poh))
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return(FALSE);
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}
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ASSERTDD(pdsurfSrc->dt == DT_DIB, "Can only handle DIB DFBs here");
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psoSrc = pdsurfSrc->pso;
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}
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// Pass the call off to GDI if the destination surface is a device
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// bitmap that we converted to a DIB:
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pdsurfDst = (DSURF*) psoDst->dhsurf;
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if (pdsurfDst->dt == DT_DIB)
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{
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psoDst = pdsurfDst->pso;
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goto Punt_It;
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}
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#if 0 // I would enable this chunk of code, except for the fact that
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{ // GDI does byte writes to the screen, which kills us on ISA
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// buses (it's faster to have GDI write to a temporary DIB,
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// paying the cost of the DIB allocation, and then doing an
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// aligned copy of the final result).
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#if defined(i386)
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{
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OH* poh;
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BANK bnk;
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BOOL b;
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RECTL rclDraw;
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// Make sure we're not doing a screen-to-screen StretchBlt,
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// because we can't map two banks in at the same time:
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if (psoSrc->iType == STYPE_BITMAP)
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{
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// We'll be drawing to the screen or an off-screen DFB;
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// copy the surface's offset now so that we won't need
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// to refer to the DSURF again:
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poh = pdsurfDst->poh;
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ppdev->xOffset = poh->x;
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ppdev->yOffset = poh->y;
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// The bank manager requires that the 'draw' rectangle be
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// well-ordered:
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rclDraw = *prclDst;
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if (rclDraw.left > rclDraw.right)
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{
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rclDraw.left = prclDst->right;
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rclDraw.right = prclDst->left;
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}
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if (rclDraw.top > rclDraw.bottom)
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{
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rclDraw.top = prclDst->bottom;
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rclDraw.bottom = prclDst->top;
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}
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vBankStart(ppdev, &rclDraw, pco, &bnk);
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b = TRUE;
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do {
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b &= EngStretchBlt(bnk.pso, psoSrc, psoMsk, bnk.pco,
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pxlo, pca, pptlHTOrg, prclDst,
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prclSrc, pptlMsk, iMode);
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} while (bBankEnum(&bnk));
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return(b);
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}
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}
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#endif // i386
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}
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#endif // 0
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Punt_It:
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// GDI is nice enough to handle the cases where 'psoDst' and/or 'psoSrc'
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// are device-managed surfaces, but it ain't gonna be fast...
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return(EngStretchBlt(psoDst, psoSrc, psoMsk, pco, pxlo, pca, pptlHTOrg,
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prclDst, prclSrc, pptlMsk, iMode));
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}
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