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1476 lines
52 KiB
1476 lines
52 KiB
/******************************Module*Header*******************************\
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* Module Name: bitblt.c
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*
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* Contains the high-level DrvBitBlt and DrvCopyBits functions. The low-
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* level stuff lives in the 'blt??.c' files.
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*
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* !!! Change note about 'iType'
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*
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* Note: Since we've implemented device-bitmaps, any surface that GDI passes
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* to us can have 3 values for its 'iType': STYPE_BITMAP, STYPE_DEVICE
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* or STYPE_DEVBITMAP. We filter device-bitmaps that we've stored
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* as DIBs fairly high in the code, so after we adjust its 'pptlSrc',
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* we can treat STYPE_DEVBITMAP surfaces the same as STYPE_DEVICE
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* surfaces (e.g., a blt from an off-screen device bitmap to the screen
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* gets treated as a normal screen-to-screen blt). So throughout
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* this code, we will compare a surface's 'iType' to STYPE_BITMAP:
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* if it's equal, we've got a true DIB, and if it's unequal, we have
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* a screen-to-screen operation.
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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\**************************************************************************/
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#include "precomp.h"
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#define gbdPunt FALSE // global boolean define punt all BitBlt calls
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/******************************Public*Table********************************\
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* BYTE gajLeftMask[] and BYTE gajRightMask[]
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*
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* Edge tables for vXferScreenTo1bpp.
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\**************************************************************************/
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BYTE gajLeftMask[] = { 0xff, 0x7f, 0x3f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
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BYTE gajRightMask[] = { 0xff, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe };
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/******************************Public*Routine******************************\
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* VOID vXferNativeSrccopy
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*
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* Does a SRCCOPY transfer of a bitmap to the screen using the frame
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* buffer, because on the ATI it's faster than using the data transfer
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* register.
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*
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\**************************************************************************/
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VOID vXferNativeSrccopy( // Type FNXFER
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PDEV* ppdev,
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LONG c, // Count of rectangles, can't be zero
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RECTL* prcl, // List of destination rectangles, in relative
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// coordinates
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ULONG rop4, // Not used
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SURFOBJ* psoSrc, // Source surface
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POINTL* pptlSrc, // Original unclipped source point
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RECTL* prclDst, // Original unclipped destination rectangle
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XLATEOBJ* pxlo) // Not used
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{
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LONG xOffset;
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LONG yOffset;
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LONG dx;
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LONG dy;
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RECTL rclDst;
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POINTL ptlSrc;
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ASSERTDD((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL),
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"Can handle trivial xlate only");
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ASSERTDD(psoSrc->iBitmapFormat == ppdev->iBitmapFormat,
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"Source must be same colour depth as screen");
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ASSERTDD(c > 0, "Can't handle zero rectangles");
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ASSERTDD(rop4 == 0xcccc, "Must be a SRCCOPY rop");
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xOffset = ppdev->xOffset;
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yOffset = ppdev->yOffset;
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dx = pptlSrc->x - prclDst->left;
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dy = pptlSrc->y - prclDst->top; // Add to destination to get source
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while (TRUE)
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{
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ptlSrc.x = prcl->left + dx;
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ptlSrc.y = prcl->top + dy;
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// 'pfnPutBits' takes only absolute coordinates, so add in the
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// off-screen bitmap offset here:
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rclDst.left = prcl->left + xOffset;
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rclDst.right = prcl->right + xOffset;
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rclDst.top = prcl->top + yOffset;
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rclDst.bottom = prcl->bottom + yOffset;
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ppdev->pfnPutBits(ppdev, psoSrc, &rclDst, &ptlSrc);
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if (--c == 0)
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return;
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prcl++;
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}
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}
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/******************************Public*Routine******************************\
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* VOID vXferScreenTo1bpp
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*
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* Performs a SRCCOPY transfer from the screen (when it's 8bpp) to a 1bpp
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* bitmap.
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*
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\**************************************************************************/
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#if defined(_X86_)
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VOID vXferScreenTo1bpp( // Type FNXFER
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PDEV* ppdev,
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LONG c, // Count of rectangles, can't be zero
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RECTL* prcl, // List of destination rectangles, in relative
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// coordinates
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ULONG ulHwMix, // Not used
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SURFOBJ* psoDst, // Destination surface
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POINTL* pptlSrc, // Original unclipped source point
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RECTL* prclDst, // Original unclipped destination rectangle
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XLATEOBJ* pxlo) // Provides colour-compressions information
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{
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LONG cjPelSize;
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VOID* pfnCompute;
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SURFOBJ soTmp;
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ULONG* pulXlate;
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ULONG ulForeColor;
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POINTL ptlSrc;
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RECTL rclTmp;
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BYTE* pjDst;
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BYTE jLeftMask;
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BYTE jRightMask;
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BYTE jNotLeftMask;
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BYTE jNotRightMask;
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LONG cjMiddle;
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LONG lDstDelta;
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LONG lSrcDelta;
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LONG cyTmpScans;
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LONG cyThis;
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LONG cyToGo;
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ASSERTDD(c > 0, "Can't handle zero rectangles");
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ASSERTDD(psoDst->iBitmapFormat == BMF_1BPP, "Only 1bpp destinations");
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ASSERTDD(TMP_BUFFER_SIZE >= (ppdev->cxMemory * ppdev->cjPelSize),
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"Temp buffer has to be larger than widest possible scan");
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// When the destination is a 1bpp bitmap, the foreground colour
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// maps to '1', and any other colour maps to '0'.
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if (ppdev->iBitmapFormat == BMF_8BPP)
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{
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// When the source is 8bpp or less, we find the forground colour
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// by searching the translate table for the only '1':
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pulXlate = pxlo->pulXlate;
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while (*pulXlate != 1)
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pulXlate++;
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ulForeColor = pulXlate - pxlo->pulXlate;
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}
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else
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{
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ASSERTDD((ppdev->iBitmapFormat == BMF_16BPP) ||
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(ppdev->iBitmapFormat == BMF_32BPP),
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"This routine only supports 8, 16 or 32bpp");
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// When the source has a depth greater than 8bpp, the foreground
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// colour will be the first entry in the translate table we get
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// from calling 'piVector':
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pulXlate = XLATEOBJ_piVector(pxlo);
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ulForeColor = 0;
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if (pulXlate != NULL) // This check isn't really needed...
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ulForeColor = pulXlate[0];
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}
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// We use the temporary buffer to keep a copy of the source
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// rectangle:
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soTmp.pvScan0 = ppdev->pvTmpBuffer;
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do {
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// ptlSrc points to the upper-left corner of the screen rectangle
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// for the current batch:
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ptlSrc.x = prcl->left + (pptlSrc->x - prclDst->left);
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ptlSrc.y = prcl->top + (pptlSrc->y - prclDst->top);
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// pfnGetBits takes absolute coordinates for the source point:
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ptlSrc.x += ppdev->xOffset;
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ptlSrc.y += ppdev->yOffset;
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pjDst = (BYTE*) psoDst->pvScan0 + (prcl->top * psoDst->lDelta)
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+ (prcl->left >> 3);
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cjPelSize = ppdev->cjPelSize;
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soTmp.lDelta = (((prcl->right + 7L) & ~7L) - (prcl->left & ~7L))
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* cjPelSize;
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// Our temporary buffer, into which we read a copy of the source,
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// may be smaller than the source rectangle. In that case, we
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// process the source rectangle in batches.
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//
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// cyTmpScans is the number of scans we can do in each batch.
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// cyToGo is the total number of scans we have to do for this
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// rectangle.
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//
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// We take the buffer size less four so that the right edge case
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// can safely read one dword past the end:
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cyTmpScans = (TMP_BUFFER_SIZE - 4) / soTmp.lDelta;
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cyToGo = prcl->bottom - prcl->top;
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ASSERTDD(cyTmpScans > 0, "Buffer too small for largest possible scan");
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// Initialize variables that don't change within the batch loop:
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rclTmp.top = 0;
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rclTmp.left = prcl->left & 7L;
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rclTmp.right = (prcl->right - prcl->left) + rclTmp.left;
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// Note that we have to be careful with the right mask so that it
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// isn't zero. A right mask of zero would mean that we'd always be
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// touching one byte past the end of the scan (even though we
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// wouldn't actually be modifying that byte), and we must never
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// access memory past the end of the bitmap (because we can access
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// violate if the bitmap end is exactly page-aligned).
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jLeftMask = gajLeftMask[rclTmp.left & 7];
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jRightMask = gajRightMask[rclTmp.right & 7];
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cjMiddle = ((rclTmp.right - 1) >> 3) - (rclTmp.left >> 3) - 1;
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if (cjMiddle < 0)
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{
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// The blt starts and ends in the same byte:
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jLeftMask &= jRightMask;
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jRightMask = 0;
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cjMiddle = 0;
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}
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jNotLeftMask = ~jLeftMask;
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jNotRightMask = ~jRightMask;
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lDstDelta = psoDst->lDelta - cjMiddle - 2;
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// Delta from the end of the destination
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// to the start on the next scan, accounting
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// for 'left' and 'right' bytes
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lSrcDelta = soTmp.lDelta - ((8 * (cjMiddle + 2)) * cjPelSize);
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// Compute source delta for special cases
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// like when cjMiddle gets bumped up to '0',
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// and to correct aligned cases
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do {
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// This is the loop that breaks the source rectangle into
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// manageable batches.
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cyThis = cyTmpScans;
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cyToGo -= cyThis;
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if (cyToGo < 0)
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cyThis += cyToGo;
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rclTmp.bottom = cyThis;
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ppdev->pfnGetBits(ppdev, &soTmp, &rclTmp, &ptlSrc);
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ptlSrc.y += cyThis; // Get ready for next batch loop
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_asm {
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mov eax,ulForeColor ;eax = foreground colour
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;ebx = temporary storage
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;ecx = count of middle dst bytes
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;dl = destination byte accumulator
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;dh = temporary storage
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mov esi,soTmp.pvScan0 ;esi = source pointer
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mov edi,pjDst ;edi = destination pointer
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; Figure out the appropriate compute routine:
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mov ebx,cjPelSize
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mov pfnCompute,offset Compute_Destination_Byte_From_8bpp
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dec ebx
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jz short Do_Left_Byte
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mov pfnCompute,offset Compute_Destination_Byte_From_16bpp
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dec ebx
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jz short Do_Left_Byte
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mov pfnCompute,offset Compute_Destination_Byte_From_32bpp
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Do_Left_Byte:
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call pfnCompute
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and dl,jLeftMask
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mov dh,jNotLeftMask
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and dh,[edi]
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or dh,dl
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mov [edi],dh
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inc edi
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mov ecx,cjMiddle
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dec ecx
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jl short Do_Right_Byte
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Do_Middle_Bytes:
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call pfnCompute
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mov [edi],dl
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inc edi
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dec ecx
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jge short Do_Middle_Bytes
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Do_Right_Byte:
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call pfnCompute
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and dl,jRightMask
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mov dh,jNotRightMask
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and dh,[edi]
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or dh,dl
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mov [edi],dh
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inc edi
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add edi,lDstDelta
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add esi,lSrcDelta
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dec cyThis
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jnz short Do_Left_Byte
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mov pjDst,edi ;save for next batch
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jmp All_Done
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Compute_Destination_Byte_From_8bpp:
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mov bl,[esi]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 0
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mov bl,[esi+1]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 1
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mov bl,[esi+2]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 2
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mov bl,[esi+3]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 3
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mov bl,[esi+4]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 4
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mov bl,[esi+5]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 5
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mov bl,[esi+6]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 6
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mov bl,[esi+7]
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sub bl,al
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cmp bl,1
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adc dl,dl ;bit 7
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add esi,8 ;advance the source
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ret
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Compute_Destination_Byte_From_16bpp:
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mov bx,[esi]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 0
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mov bx,[esi+2]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 1
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mov bx,[esi+4]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 2
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mov bx,[esi+6]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 3
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mov bx,[esi+8]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 4
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mov bx,[esi+10]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 5
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mov bx,[esi+12]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 6
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mov bx,[esi+14]
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sub bx,ax
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cmp bx,1
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adc dl,dl ;bit 7
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add esi,16 ;advance the source
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ret
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Compute_Destination_Byte_From_32bpp:
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mov ebx,[esi]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 0
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mov ebx,[esi+4]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 1
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mov ebx,[esi+8]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 2
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mov ebx,[esi+12]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 3
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mov ebx,[esi+16]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 4
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mov ebx,[esi+20]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 5
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mov ebx,[esi+24]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 6
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mov ebx,[esi+28]
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sub ebx,eax
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cmp ebx,1
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adc dl,dl ;bit 7
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add esi,32 ;advance the source
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ret
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All_Done:
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}
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} while (cyToGo > 0);
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prcl++;
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} while (--c != 0);
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}
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#endif // i386
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|
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/******************************Public*Routine******************************\
|
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* BOOL bPuntBlt
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*
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* Has GDI do any drawing operations that we don't specifically handle
|
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* in the driver.
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*
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\**************************************************************************/
|
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|
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BOOL bPuntBlt(
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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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RECTL* prclDst,
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POINTL* pptlSrc,
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POINTL* pptlMsk,
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BRUSHOBJ* pbo,
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POINTL* pptlBrush,
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ROP4 rop4)
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{
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PDEV* ppdev;
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|
|
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if (psoDst->iType != STYPE_BITMAP)
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ppdev = (PDEV*) psoDst->dhpdev;
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else
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ppdev = (PDEV*) psoSrc->dhpdev;
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|
|
#if DBG
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|
{
|
|
//////////////////////////////////////////////////////////////////////
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|
// Diagnostics
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|
//
|
|
// Since calling the engine to do any drawing can be rather painful,
|
|
// particularly when the source is an off-screen DFB (since GDI will
|
|
// have to allocate a DIB and call us to make a temporary copy before
|
|
// it can even start drawing), we'll try to avoid it as much as
|
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// possible.
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|
//
|
|
// Here we simply spew out information describing the blt whenever
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|
// this routine gets called (checked builds only, of course):
|
|
|
|
ULONG ulClip;
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PDEV* dbg_ppdev;
|
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|
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if (psoDst->dhpdev != NULL)
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dbg_ppdev = (PDEV*) psoDst->dhpdev;
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else
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dbg_ppdev = (PDEV*) psoSrc->dhpdev;
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|
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ulClip = (pco == NULL) ? DC_TRIVIAL : pco->iDComplexity;
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|
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DISPDBG((15, ">> Punt << Dst format: %li Dst type: %li Clip: %li Rop: %lx",
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psoDst->iBitmapFormat, psoDst->iType, ulClip, rop4));
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|
|
if (psoSrc != NULL)
|
|
{
|
|
DISPDBG((15, " << Src format: %li Src type: %li",
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psoSrc->iBitmapFormat, psoSrc->iType));
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|
|
if (psoSrc->iBitmapFormat == BMF_1BPP)
|
|
{
|
|
DISPDBG((15, " << Foreground: %lx Background: %lx",
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pxlo->pulXlate[1], pxlo->pulXlate[0]));
|
|
}
|
|
}
|
|
|
|
if ((pxlo != NULL) && !(pxlo->flXlate & XO_TRIVIAL) && (psoSrc != NULL))
|
|
{
|
|
if (((psoSrc->dhsurf == NULL) &&
|
|
(psoSrc->iBitmapFormat != dbg_ppdev->iBitmapFormat)) ||
|
|
((psoDst->dhsurf == NULL) &&
|
|
(psoDst->iBitmapFormat != dbg_ppdev->iBitmapFormat)))
|
|
{
|
|
// Don't bother printing the 'xlate' message when the source
|
|
// is a different bitmap format from the destination -- in
|
|
// those cases we know there always has to be a translate.
|
|
}
|
|
else
|
|
{
|
|
DISPDBG((15, " << With xlate"));
|
|
}
|
|
}
|
|
|
|
// If the rop4 requires a pattern, and it's a non-solid brush...
|
|
|
|
if (((((rop4 >> 4) ^ (rop4)) & 0x0f0f) != 0) &&
|
|
(pbo->iSolidColor == -1))
|
|
{
|
|
if (pbo->pvRbrush == NULL)
|
|
DISPDBG((15, " << With brush -- Not created"));
|
|
else
|
|
DISPDBG((15, " << With brush -- Created Ok"));
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (DIRECT_ACCESS(ppdev))
|
|
{
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Banked Framebuffer bPuntBlt
|
|
//
|
|
// This section of code handles a PuntBlt when GDI can directly draw
|
|
// on the framebuffer, but the drawing has to be done in banks:
|
|
|
|
BANK bnk;
|
|
BOOL b;
|
|
HSURF hsurfTmp;
|
|
SURFOBJ* psoTmp;
|
|
SIZEL sizl;
|
|
POINTL ptlSrc;
|
|
RECTL rclTmp;
|
|
RECTL rclDst;
|
|
|
|
// We copy the original destination rectangle, and use that in every
|
|
// GDI call-back instead of the original because sometimes GDI is
|
|
// sneaky and points 'prclDst' to '&pco->rclBounds'. Because we
|
|
// modify 'rclBounds', that would affect 'prclDst', which we don't
|
|
// want to happen:
|
|
|
|
rclDst = *prclDst;
|
|
|
|
if ((psoSrc == NULL) || (psoSrc->iType == STYPE_BITMAP))
|
|
{
|
|
ASSERTDD(psoDst->iType != STYPE_BITMAP,
|
|
"Dest should be the screen when given a DIB source");
|
|
|
|
// Do a memory-to-screen blt:
|
|
|
|
vBankStart(ppdev, &rclDst, pco, &bnk);
|
|
|
|
b = TRUE;
|
|
do {
|
|
b &= EngBitBlt(bnk.pso, psoSrc, psoMsk, bnk.pco, pxlo,
|
|
&rclDst, pptlSrc, pptlMsk, pbo, pptlBrush,
|
|
rop4);
|
|
|
|
} while (bBankEnum(&bnk));
|
|
}
|
|
else
|
|
{
|
|
b = FALSE; // Assume failure
|
|
|
|
// The screen is the source (it may be the destination too...)
|
|
|
|
ptlSrc.x = pptlSrc->x + ppdev->xOffset;
|
|
ptlSrc.y = pptlSrc->y + ppdev->yOffset;
|
|
|
|
if ((pco != NULL) && (pco->iDComplexity != DC_TRIVIAL))
|
|
{
|
|
// We have to intersect the destination rectangle with
|
|
// the clip bounds if there is one (consider the case
|
|
// where the app asked to blt a really, really big
|
|
// rectangle from the screen -- prclDst would be really,
|
|
// really big but pco->rclBounds would be the actual
|
|
// area of interest):
|
|
|
|
rclDst.left = max(rclDst.left, pco->rclBounds.left);
|
|
rclDst.top = max(rclDst.top, pco->rclBounds.top);
|
|
rclDst.right = min(rclDst.right, pco->rclBounds.right);
|
|
rclDst.bottom = min(rclDst.bottom, pco->rclBounds.bottom);
|
|
|
|
// Correspondingly, we have to offset the source point:
|
|
|
|
ptlSrc.x += (rclDst.left - prclDst->left);
|
|
ptlSrc.y += (rclDst.top - prclDst->top);
|
|
}
|
|
|
|
// We're now either going to do a screen-to-screen or screen-to-DIB
|
|
// blt. In either case, we're going to create a temporary copy of
|
|
// the source. (Why do we do this when GDI could do it for us?
|
|
// GDI would create a temporary copy of the DIB for every bank
|
|
// call-back!)
|
|
|
|
sizl.cx = rclDst.right - rclDst.left;
|
|
sizl.cy = rclDst.bottom - rclDst.top;
|
|
|
|
// Don't forget to convert from relative to absolute coordinates
|
|
// on the source! (vBankStart takes care of that for the
|
|
// destination.)
|
|
|
|
rclTmp.right = sizl.cx;
|
|
rclTmp.bottom = sizl.cy;
|
|
rclTmp.left = 0;
|
|
rclTmp.top = 0;
|
|
|
|
// GDI does guarantee us that the blt extents have already been
|
|
// clipped to the surface boundaries (we don't have to worry
|
|
// here about trying to read where there isn't video memory).
|
|
// Let's just assert to make sure:
|
|
|
|
ASSERTDD((ptlSrc.x >= 0) &&
|
|
(ptlSrc.y >= 0) &&
|
|
(ptlSrc.x + sizl.cx <= ppdev->cxMemory) &&
|
|
(ptlSrc.y + sizl.cy <= ppdev->cyMemory),
|
|
"Source rectangle out of bounds!");
|
|
|
|
hsurfTmp = (HSURF) EngCreateBitmap(sizl,
|
|
0, // Let GDI choose ulWidth
|
|
ppdev->iBitmapFormat,
|
|
0, // Don't need any options
|
|
NULL);// Let GDI allocate
|
|
|
|
if (hsurfTmp != 0)
|
|
{
|
|
psoTmp = EngLockSurface(hsurfTmp);
|
|
|
|
if (psoTmp != NULL)
|
|
{
|
|
ppdev->pfnGetBits(ppdev, psoTmp, &rclTmp, &ptlSrc);
|
|
|
|
if (psoDst->iType == STYPE_BITMAP)
|
|
{
|
|
// It was a Screen-to-DIB blt; now it's a DIB-to-DIB
|
|
// blt. Note that the source point is (0, 0) in our
|
|
// temporary surface:
|
|
|
|
b = EngBitBlt(psoDst, psoTmp, psoMsk, pco, pxlo,
|
|
&rclDst, (POINTL*) &rclTmp, pptlMsk,
|
|
pbo, pptlBrush, rop4);
|
|
}
|
|
else
|
|
{
|
|
// It was a Screen-to-Screen blt; now it's a DIB-to-
|
|
// screen blt. Note that the source point is (0, 0)
|
|
// in our temporary surface:
|
|
|
|
vBankStart(ppdev, &rclDst, pco, &bnk);
|
|
|
|
b = TRUE;
|
|
do {
|
|
b &= EngBitBlt(bnk.pso, psoTmp, psoMsk, bnk.pco,
|
|
pxlo, &rclDst, (POINTL*) &rclTmp,
|
|
pptlMsk, pbo, pptlBrush, rop4);
|
|
|
|
} while (bBankEnum(&bnk));
|
|
}
|
|
|
|
EngUnlockSurface(psoTmp);
|
|
}
|
|
|
|
EngDeleteSurface(hsurfTmp);
|
|
}
|
|
}
|
|
|
|
return(b);
|
|
}
|
|
else
|
|
{
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Really Slow bPuntBlt
|
|
//
|
|
// Here we handle a PuntBlt when GDI can't draw directly on the
|
|
// framebuffer (as on the Alpha, which can't do it because of its
|
|
// 32 bit bus). If you thought the banked version was slow, just
|
|
// look at this one. Guaranteed, there will be at least one bitmap
|
|
// allocation and extra copy involved; there could be two if it's a
|
|
// screen-to-screen operation.
|
|
|
|
POINTL ptlSrc;
|
|
RECTL rclDst;
|
|
SIZEL sizl;
|
|
BOOL bSrcIsScreen;
|
|
HSURF hsurfSrc;
|
|
RECTL rclTmp;
|
|
BOOL b;
|
|
LONG lDelta;
|
|
BYTE* pjBits;
|
|
BYTE* pjScan0;
|
|
HSURF hsurfDst;
|
|
RECTL rclScreen;
|
|
|
|
b = FALSE; // For error cases, assume we'll fail
|
|
|
|
rclDst = *prclDst;
|
|
if (pptlSrc != NULL)
|
|
ptlSrc = *pptlSrc;
|
|
|
|
if ((pco != NULL) && (pco->iDComplexity != DC_TRIVIAL))
|
|
{
|
|
// We have to intersect the destination rectangle with
|
|
// the clip bounds if there is one (consider the case
|
|
// where the app asked to blt a really, really big
|
|
// rectangle from the screen -- prclDst would be really,
|
|
// really big but pco->rclBounds would be the actual
|
|
// area of interest):
|
|
|
|
rclDst.left = max(rclDst.left, pco->rclBounds.left);
|
|
rclDst.top = max(rclDst.top, pco->rclBounds.top);
|
|
rclDst.right = min(rclDst.right, pco->rclBounds.right);
|
|
rclDst.bottom = min(rclDst.bottom, pco->rclBounds.bottom);
|
|
|
|
ptlSrc.x += (rclDst.left - prclDst->left);
|
|
ptlSrc.y += (rclDst.top - prclDst->top);
|
|
}
|
|
|
|
sizl.cx = rclDst.right - rclDst.left;
|
|
sizl.cy = rclDst.bottom - rclDst.top;
|
|
|
|
// We only need to make a copy from the screen if the source is
|
|
// the screen, and the source is involved in the rop. Note that
|
|
// we have to check the rop before dereferencing 'psoSrc'
|
|
// (because 'psoSrc' may be NULL if the source isn't involved):
|
|
|
|
bSrcIsScreen = (((((rop4 >> 2) ^ (rop4)) & 0x3333) != 0) &&
|
|
(psoSrc->iType != STYPE_BITMAP));
|
|
|
|
if (bSrcIsScreen)
|
|
{
|
|
// We need to create a copy of the source rectangle:
|
|
|
|
hsurfSrc = (HSURF) EngCreateBitmap(sizl, 0, ppdev->iBitmapFormat,
|
|
0, NULL);
|
|
if (hsurfSrc == 0)
|
|
goto Error_0;
|
|
|
|
psoSrc = EngLockSurface(hsurfSrc);
|
|
if (psoSrc == NULL)
|
|
goto Error_1;
|
|
|
|
rclTmp.left = 0;
|
|
rclTmp.top = 0;
|
|
rclTmp.right = sizl.cx;
|
|
rclTmp.bottom = sizl.cy;
|
|
|
|
// pfnGetBits takes absolute coordinates for the source point:
|
|
|
|
ptlSrc.x += ppdev->xOffset;
|
|
ptlSrc.y += ppdev->yOffset;
|
|
|
|
ppdev->pfnGetBits(ppdev, psoSrc, &rclTmp, &ptlSrc);
|
|
|
|
// The source will now come from (0, 0) of our temporary source
|
|
// surface:
|
|
|
|
ptlSrc.x = 0;
|
|
ptlSrc.y = 0;
|
|
}
|
|
|
|
if (psoDst->iType == STYPE_BITMAP)
|
|
{
|
|
b = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, &rclDst, &ptlSrc,
|
|
pptlMsk, pbo, pptlBrush, rop4);
|
|
}
|
|
else
|
|
{
|
|
// We need to create a temporary work buffer. We have to do
|
|
// some fudging with the offsets so that the upper-left corner
|
|
// of the (relative coordinates) clip object bounds passed to
|
|
// GDI will be transformed to the upper-left corner of our
|
|
// temporary bitmap.
|
|
|
|
// The alignment doesn't have to be as tight as this at 16bpp
|
|
// and 32bpp, but it won't hurt:
|
|
|
|
lDelta = (((rclDst.right + 3) & ~3L) - (rclDst.left & ~3L))
|
|
* ppdev->cjPelSize;
|
|
|
|
// We're actually only allocating a bitmap that is 'sizl.cx' x
|
|
// 'sizl.cy' in size:
|
|
|
|
pjBits = AtiAllocMem(LMEM_FIXED, 0, lDelta * sizl.cy);
|
|
if (pjBits == NULL)
|
|
goto Error_2;
|
|
|
|
// We now adjust the surface's 'pvScan0' so that when GDI thinks
|
|
// it's writing to pixel (rclDst.top, rclDst.left), it will
|
|
// actually be writing to the upper-left pixel of our temporary
|
|
// bitmap:
|
|
|
|
pjScan0 = pjBits - (rclDst.top * lDelta)
|
|
- ((rclDst.left & ~3L) * ppdev->cjPelSize);
|
|
|
|
ASSERTDD((((ULONG_PTR) pjScan0) & 3) == 0,
|
|
"pvScan0 must be dword aligned!");
|
|
|
|
// The checked build of GDI sometimes checks on blts that
|
|
// prclDst->right <= pso->sizl.cx, so we lie to it about
|
|
// the size of our bitmap:
|
|
|
|
sizl.cx = rclDst.right;
|
|
sizl.cy = rclDst.bottom;
|
|
|
|
hsurfDst = (HSURF) EngCreateBitmap(
|
|
sizl, // Bitmap covers rectangle
|
|
lDelta, // Use this delta
|
|
ppdev->iBitmapFormat, // Same colour depth
|
|
BMF_TOPDOWN, // Must have a positive delta
|
|
pjScan0); // Where (0, 0) would be
|
|
|
|
if ((hsurfDst == 0) ||
|
|
(!EngAssociateSurface(hsurfDst, ppdev->hdevEng, 0)))
|
|
goto Error_3;
|
|
|
|
psoDst = EngLockSurface(hsurfDst);
|
|
if (psoDst == NULL)
|
|
goto Error_4;
|
|
|
|
// Make sure that the rectangle we Get/Put from/to the screen
|
|
// is in absolute coordinates:
|
|
|
|
rclScreen.left = rclDst.left + ppdev->xOffset;
|
|
rclScreen.right = rclDst.right + ppdev->xOffset;
|
|
rclScreen.top = rclDst.top + ppdev->yOffset;
|
|
rclScreen.bottom = rclDst.bottom + ppdev->yOffset;
|
|
|
|
// It would be nice to get a copy of the destination rectangle
|
|
// only when the ROP involves the destination (or when the source
|
|
// is an RLE), but we can't do that. If the brush is truly NULL,
|
|
// GDI will immediately return TRUE from EngBitBlt, without
|
|
// modifying the temporary bitmap -- and we would proceed to
|
|
// copy the uninitialized temporary bitmap back to the screen.
|
|
|
|
ppdev->pfnGetBits(ppdev, psoDst, &rclDst, (POINTL*) &rclScreen);
|
|
|
|
b = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, &rclDst, &ptlSrc,
|
|
pptlMsk, pbo, pptlBrush, rop4);
|
|
|
|
ppdev->pfnPutBits(ppdev, psoDst, &rclScreen, (POINTL*) &rclDst);
|
|
|
|
EngUnlockSurface(psoDst);
|
|
|
|
Error_4:
|
|
|
|
EngDeleteSurface(hsurfDst);
|
|
|
|
Error_3:
|
|
|
|
AtiFreeMem(pjBits);
|
|
}
|
|
|
|
Error_2:
|
|
|
|
if (bSrcIsScreen)
|
|
{
|
|
EngUnlockSurface(psoSrc);
|
|
|
|
Error_1:
|
|
|
|
EngDeleteSurface(hsurfSrc);
|
|
}
|
|
|
|
Error_0:
|
|
|
|
return(b);
|
|
}
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* BOOL DrvBitBlt
|
|
*
|
|
* Implements the workhorse routine of a display driver.
|
|
*
|
|
\**************************************************************************/
|
|
|
|
BOOL DrvBitBlt(
|
|
SURFOBJ* psoDst,
|
|
SURFOBJ* psoSrc,
|
|
SURFOBJ* psoMsk,
|
|
CLIPOBJ* pco,
|
|
XLATEOBJ* pxlo,
|
|
RECTL* prclDst,
|
|
POINTL* pptlSrc,
|
|
POINTL* pptlMsk,
|
|
BRUSHOBJ* pbo,
|
|
POINTL* pptlBrush,
|
|
ROP4 rop4)
|
|
{
|
|
PDEV* ppdev;
|
|
DSURF* pdsurfDst;
|
|
DSURF* pdsurfSrc;
|
|
POINTL ptlSrc;
|
|
BYTE jClip;
|
|
OH* poh;
|
|
BOOL bMore;
|
|
CLIPENUM ce;
|
|
LONG c;
|
|
RECTL rcl;
|
|
BYTE rop3;
|
|
FNFILL* pfnFill;
|
|
RBRUSH_COLOR rbc; // Realized brush or solid colour
|
|
FNXFER* pfnXfer;
|
|
ULONG iSrcBitmapFormat;
|
|
ULONG iDir;
|
|
BOOL bRet;
|
|
|
|
bRet = TRUE; // Assume success
|
|
|
|
pdsurfDst = (DSURF*) psoDst->dhsurf; // May be NULL
|
|
|
|
if ((psoSrc == NULL) && (gbdPunt == FALSE))
|
|
{
|
|
///////////////////////////////////////////////////////////////////
|
|
// Fills
|
|
///////////////////////////////////////////////////////////////////
|
|
|
|
// Fills are this function's "raison d'etre", so we handle them
|
|
// as quickly as possible:
|
|
|
|
ASSERTDD(pdsurfDst != NULL,
|
|
"Expect only device destinations when no source");
|
|
|
|
if (pdsurfDst->dt == DT_SCREEN)
|
|
{
|
|
ppdev = (PDEV*) psoDst->dhpdev;
|
|
|
|
poh = pdsurfDst->poh;
|
|
ppdev->xOffset = poh->x;
|
|
ppdev->yOffset = poh->y;
|
|
|
|
// Make sure it doesn't involve a mask (i.e., it's really a
|
|
// Rop3):
|
|
|
|
rop3 = (BYTE) rop4;
|
|
|
|
if ((BYTE) (rop4 >> 8) == rop3)
|
|
{
|
|
// Since 'psoSrc' is NULL, the rop3 had better not indicate
|
|
// that we need a source.
|
|
|
|
ASSERTDD((((rop4 >> 2) ^ (rop4)) & 0x33) == 0,
|
|
"Need source but GDI gave us a NULL 'psoSrc'");
|
|
|
|
Fill_It:
|
|
|
|
pfnFill = ppdev->pfnFillSolid; // Default to solid fill
|
|
|
|
if ((((rop3 >> 4) ^ (rop3)) & 0xf) != 0)
|
|
{
|
|
// The rop says that a pattern is truly required
|
|
// (blackness, for instance, doesn't need one):
|
|
|
|
rbc.iSolidColor = pbo->iSolidColor;
|
|
if (rbc.iSolidColor == -1)
|
|
{
|
|
// Try and realize the pattern brush; by doing
|
|
// this call-back, GDI will eventually call us
|
|
// again through DrvRealizeBrush:
|
|
|
|
rbc.prb = pbo->pvRbrush;
|
|
if (rbc.prb == NULL)
|
|
{
|
|
rbc.prb = BRUSHOBJ_pvGetRbrush(pbo);
|
|
if (rbc.prb == NULL)
|
|
{
|
|
// If we couldn't realize the brush, punt
|
|
// the call (it may have been a non 8x8
|
|
// brush or something, which we can't be
|
|
// bothered to handle, so let GDI do the
|
|
// drawing):
|
|
|
|
goto Punt_It;
|
|
}
|
|
}
|
|
pfnFill = rbc.prb->pfnFillPat;
|
|
|
|
if ((ppdev->FeatureFlags & EVN_SDRAM_1M) &&
|
|
(pfnFill == vM64FillPatColor || pfnFill == vM64FillPatColor24))
|
|
{
|
|
// The VTA4 can't handle color patterns correctly!!
|
|
|
|
goto Punt_It;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Note that these 2 'if's are more efficient than
|
|
// a switch statement:
|
|
|
|
if ((pco == NULL) || (pco->iDComplexity == DC_TRIVIAL))
|
|
{
|
|
pfnFill(ppdev, 1, prclDst, rop4, rbc, pptlBrush);
|
|
goto All_Done;
|
|
}
|
|
else if (pco->iDComplexity == DC_RECT)
|
|
{
|
|
if (bIntersect(prclDst, &pco->rclBounds, &rcl))
|
|
pfnFill(ppdev, 1, &rcl, rop4, rbc, pptlBrush);
|
|
goto All_Done;
|
|
}
|
|
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)
|
|
pfnFill(ppdev, c, ce.arcl, rop4, rbc, pptlBrush);
|
|
|
|
} while (bMore);
|
|
goto All_Done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
jClip = (pco == NULL) ? DC_TRIVIAL : pco->iDComplexity;
|
|
|
|
if ((psoSrc != NULL) && (psoSrc->dhsurf != NULL))
|
|
{
|
|
pdsurfSrc = (DSURF*) psoSrc->dhsurf;
|
|
if (pdsurfSrc->dt == DT_DIB)
|
|
{
|
|
// Here we consider putting a DIB DFB back into off-screen
|
|
// memory. If there's a translate, it's probably not worth
|
|
// moving since we won't be able to use the hardware to do
|
|
// the blt (a similar argument could be made for weird rops
|
|
// and stuff that we'll only end up having GDI simulate, but
|
|
// those should happen infrequently enough that I don't care).
|
|
|
|
if ((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL))
|
|
{
|
|
ppdev = (PDEV*) psoSrc->dhpdev;
|
|
|
|
// See 'DrvCopyBits' for some more comments on how this
|
|
// moving-it-back-into-off-screen-memory thing works:
|
|
|
|
if (pdsurfSrc->iUniq == ppdev->iHeapUniq)
|
|
{
|
|
if (--pdsurfSrc->cBlt == 0)
|
|
{
|
|
if (bMoveDibToOffscreenDfbIfRoom(ppdev, pdsurfSrc))
|
|
goto Continue_It;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
// Some space was freed up in off-screen memory,
|
|
// so reset the counter for this DFB:
|
|
|
|
pdsurfSrc->iUniq = ppdev->iHeapUniq;
|
|
pdsurfSrc->cBlt = HEAP_COUNT_DOWN;
|
|
}
|
|
}
|
|
|
|
psoSrc = pdsurfSrc->pso;
|
|
|
|
// Handle the case where the source is a DIB DFB and the
|
|
// destination is a regular bitmap:
|
|
|
|
if (psoDst->dhsurf == NULL)
|
|
goto EngBitBlt_It;
|
|
|
|
}
|
|
}
|
|
|
|
Continue_It:
|
|
|
|
if (pdsurfDst != NULL)
|
|
{
|
|
if (pdsurfDst->dt == DT_DIB)
|
|
{
|
|
psoDst = pdsurfDst->pso;
|
|
|
|
// If the destination is a DIB, we can only handle this
|
|
// call if the source is not a DIB:
|
|
|
|
if ((psoSrc == NULL) || (psoSrc->dhsurf == NULL))
|
|
goto EngBitBlt_It;
|
|
}
|
|
}
|
|
|
|
// At this point, we know that either the source or the destination is
|
|
// not a DIB. Check for a DFB to screen, DFB to DFB, or screen to DFB
|
|
// case:
|
|
|
|
if ((psoSrc != NULL) &&
|
|
(psoDst->dhsurf != NULL) &&
|
|
(psoSrc->dhsurf != NULL))
|
|
{
|
|
pdsurfSrc = (DSURF*) psoSrc->dhsurf;
|
|
pdsurfDst = (DSURF*) psoDst->dhsurf;
|
|
|
|
ASSERTDD(pdsurfSrc->dt == DT_SCREEN, "Expected screen source");
|
|
ASSERTDD(pdsurfDst->dt == DT_SCREEN, "Expected screen destination");
|
|
|
|
ptlSrc.x = pptlSrc->x - (pdsurfDst->poh->x - pdsurfSrc->poh->x);
|
|
ptlSrc.y = pptlSrc->y - (pdsurfDst->poh->y - pdsurfSrc->poh->y);
|
|
|
|
pptlSrc = &ptlSrc;
|
|
}
|
|
|
|
if (psoDst->dhsurf != NULL)
|
|
{
|
|
pdsurfDst = (DSURF*) psoDst->dhsurf;
|
|
ppdev = (PDEV*) psoDst->dhpdev;
|
|
|
|
ppdev->xOffset = pdsurfDst->poh->x;
|
|
ppdev->yOffset = pdsurfDst->poh->y;
|
|
}
|
|
else
|
|
{
|
|
DSURF * pTmpdsurfSrc = (DSURF*) psoSrc->dhsurf;
|
|
ppdev = (PDEV*) psoSrc->dhpdev;
|
|
|
|
if (!pTmpdsurfSrc) {
|
|
DISPDBG((0, "bad surf in psoSrc:%x, from %x\n", psoSrc, pdsurfSrc));
|
|
}
|
|
|
|
ppdev->xOffset = pTmpdsurfSrc->poh->x;
|
|
ppdev->yOffset = pTmpdsurfSrc->poh->y;
|
|
}
|
|
|
|
if (gbdPunt)
|
|
{
|
|
goto Punt_It;
|
|
}
|
|
|
|
if (((rop4 >> 8) & 0xff) == (rop4 & 0xff))
|
|
{
|
|
// Since we've already handled the cases where the ROP4 is really
|
|
// a ROP3 and no source is required, we can assert...
|
|
|
|
ASSERTDD((psoSrc != NULL) && (pptlSrc != NULL),
|
|
"Expected no-source case to already have been handled");
|
|
|
|
///////////////////////////////////////////////////////////////////
|
|
// Bitmap transfers
|
|
///////////////////////////////////////////////////////////////////
|
|
|
|
// Since the foreground and background ROPs are the same, we
|
|
// don't have to worry about no stinking masks (it's a simple
|
|
// Rop3).
|
|
|
|
rop3 = (BYTE) rop4; // Make it into a Rop3 (we keep the rop4
|
|
// around in case we decide to punt)
|
|
|
|
if (psoDst->dhsurf != NULL)
|
|
{
|
|
// The destination is the screen:
|
|
|
|
if ((rop3 >> 4) == (rop3 & 0xf))
|
|
{
|
|
// The ROP3 doesn't require a pattern:
|
|
|
|
if (psoSrc->dhsurf == NULL)
|
|
{
|
|
//////////////////////////////////////////////////
|
|
// DIB-to-screen blt
|
|
|
|
iSrcBitmapFormat = psoSrc->iBitmapFormat;
|
|
if (iSrcBitmapFormat == BMF_1BPP)
|
|
{
|
|
//RKE: do this when we have time
|
|
if (ppdev->iBitmapFormat == BMF_24BPP)
|
|
goto Punt_It;
|
|
|
|
pfnXfer = ppdev->pfnXfer1bpp;
|
|
goto Xfer_It;
|
|
}
|
|
else if ((iSrcBitmapFormat == ppdev->iBitmapFormat) &&
|
|
((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL)))
|
|
{
|
|
if ((rop3 & 0xf) != 0xc)
|
|
{
|
|
pfnXfer = ppdev->pfnXferNative;
|
|
}
|
|
else
|
|
{
|
|
// Plain SRCCOPY blts will be somewhat faster on
|
|
// the ATI if we go through the memory aperture:
|
|
|
|
pfnXfer = vXferNativeSrccopy;
|
|
}
|
|
goto Xfer_It;
|
|
}
|
|
else if (ppdev->iBitmapFormat != BMF_24BPP)
|
|
{
|
|
// I can't be bothered to write 4bpp or 8bpp
|
|
// expansion code when running at 24bpp:
|
|
|
|
if (iSrcBitmapFormat == BMF_4BPP)
|
|
{
|
|
pfnXfer = ppdev->pfnXfer4bpp;
|
|
goto Xfer_It;
|
|
}
|
|
else if (iSrcBitmapFormat == BMF_8BPP)
|
|
{
|
|
pfnXfer = ppdev->pfnXfer8bpp;
|
|
goto Xfer_It;
|
|
}
|
|
}
|
|
}
|
|
else // psoSrc->dhsurf != NULL
|
|
{
|
|
if ((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL))
|
|
{
|
|
//////////////////////////////////////////////////
|
|
// Screen-to-screen blt with no translate
|
|
|
|
if (jClip == DC_TRIVIAL)
|
|
{
|
|
(ppdev->pfnCopyBlt)(ppdev, 1, prclDst, rop4,
|
|
pptlSrc, prclDst);
|
|
goto All_Done;
|
|
}
|
|
else if (jClip == DC_RECT)
|
|
{
|
|
if (bIntersect(prclDst, &pco->rclBounds, &rcl))
|
|
{
|
|
(ppdev->pfnCopyBlt)(ppdev, 1, &rcl, rop4,
|
|
pptlSrc, prclDst);
|
|
}
|
|
goto All_Done;
|
|
}
|
|
else
|
|
{
|
|
// Don't forget that we'll have to draw the
|
|
// rectangles in the correct direction:
|
|
|
|
if (pptlSrc->y >= prclDst->top)
|
|
{
|
|
if (pptlSrc->x >= prclDst->left)
|
|
iDir = CD_RIGHTDOWN;
|
|
else
|
|
iDir = CD_LEFTDOWN;
|
|
}
|
|
else
|
|
{
|
|
if (pptlSrc->x >= prclDst->left)
|
|
iDir = CD_RIGHTUP;
|
|
else
|
|
iDir = CD_LEFTUP;
|
|
}
|
|
|
|
CLIPOBJ_cEnumStart(pco, FALSE, CT_RECTANGLES,
|
|
iDir, 0);
|
|
|
|
do {
|
|
bMore = CLIPOBJ_bEnum(pco, sizeof(ce),
|
|
(ULONG*) &ce);
|
|
|
|
c = cIntersect(prclDst, ce.arcl, ce.c);
|
|
|
|
if (c != 0)
|
|
{
|
|
(ppdev->pfnCopyBlt)(ppdev, c, ce.arcl,
|
|
rop4, pptlSrc, prclDst);
|
|
}
|
|
|
|
} while (bMore);
|
|
goto All_Done;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
#if defined(_X86_)
|
|
{
|
|
// We special case screen to monochrome blts because they
|
|
// happen fairly often. We only handle SRCCOPY rops and
|
|
// monochrome destinations (to handle a true 1bpp DIB
|
|
// destination, we would have to do near-colour searches
|
|
// on every colour; as it is, the foreground colour gets
|
|
// mapped to '1', and everything else gets mapped to '0'):
|
|
|
|
if ((psoDst->iBitmapFormat == BMF_1BPP) &&
|
|
(rop3 == 0xcc) &&
|
|
(pxlo->flXlate & XO_TO_MONO) &&
|
|
(ppdev->iBitmapFormat != BMF_24BPP))
|
|
{
|
|
pfnXfer = vXferScreenTo1bpp;
|
|
psoSrc = psoDst; // A misnomer, I admit
|
|
goto Xfer_It;
|
|
}
|
|
}
|
|
#endif // i386
|
|
}
|
|
}
|
|
|
|
else if ((psoMsk == NULL) && (rop4 == 0xaacc))
|
|
{
|
|
// The only time GDI will ask us to do a true rop4 using the brush
|
|
// mask is when the brush is 1bpp, and the background rop is AA
|
|
// (meaning it's a NOP):
|
|
|
|
if (ppdev->flCaps & CAPS_MONOCHROME_PATTERNS)
|
|
{
|
|
// We only handle these if our ATI has hardware monochrome
|
|
// pattern capabilities:
|
|
|
|
rop3 = (BYTE) rop4;
|
|
|
|
goto Fill_It;
|
|
}
|
|
}
|
|
|
|
// Just fall through to Punt_It...
|
|
|
|
Punt_It:
|
|
|
|
bRet = bPuntBlt(psoDst,
|
|
psoSrc,
|
|
psoMsk,
|
|
pco,
|
|
pxlo,
|
|
prclDst,
|
|
pptlSrc,
|
|
pptlMsk,
|
|
pbo,
|
|
pptlBrush,
|
|
rop4);
|
|
goto All_Done;
|
|
|
|
//////////////////////////////////////////////////////////////////////
|
|
// Common bitmap transfer
|
|
|
|
Xfer_It:
|
|
if (jClip == DC_TRIVIAL)
|
|
{
|
|
pfnXfer(ppdev, 1, prclDst, rop4, psoSrc, pptlSrc, prclDst, pxlo);
|
|
goto All_Done;
|
|
}
|
|
else if (jClip == DC_RECT)
|
|
{
|
|
if (bIntersect(prclDst, &pco->rclBounds, &rcl))
|
|
pfnXfer(ppdev, 1, &rcl, rop4, psoSrc, pptlSrc, prclDst, pxlo);
|
|
goto All_Done;
|
|
}
|
|
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)
|
|
{
|
|
pfnXfer(ppdev, c, ce.arcl, rop4, psoSrc,
|
|
pptlSrc, prclDst, pxlo);
|
|
}
|
|
|
|
} while (bMore);
|
|
goto All_Done;
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////
|
|
// Common DIB blt
|
|
|
|
EngBitBlt_It:
|
|
|
|
// Our driver doesn't handle any blt's between two DIBs. Normally
|
|
// a driver doesn't have to worry about this, but we do because
|
|
// we have DFBs that may get moved from off-screen memory to a DIB,
|
|
// where we have GDI do all the drawing. GDI does DIB drawing at
|
|
// a reasonable speed (unless one of the surfaces is a device-
|
|
// managed surface...)
|
|
//
|
|
// If either the source or destination surface in an EngBitBlt
|
|
// call-back is a device-managed surface (meaning it's not a DIB
|
|
// that GDI can draw with), GDI will automatically allocate memory
|
|
// and call the driver's DrvCopyBits routine to create a DIB copy
|
|
// that it can use. So this means that this could handle all 'punts',
|
|
// and we could conceivably get rid of bPuntBlt. But this would have
|
|
// a bad performance impact because of the extra memory allocations
|
|
// and bitmap copies -- you really don't want to do this unless you
|
|
// have to (or your surface was created such that GDI can draw
|
|
// directly onto it) -- I've been burned by this because it's not
|
|
// obvious that the performance impact is so bad.
|
|
//
|
|
// That being said, we only call EngBitBlt when all the surfaces
|
|
// are DIBs:
|
|
|
|
bRet = EngBitBlt(psoDst, psoSrc, psoMsk, pco, pxlo, prclDst,
|
|
pptlSrc, pptlMsk, pbo, pptlBrush, rop4);
|
|
|
|
All_Done:
|
|
return(bRet);
|
|
}
|
|
|
|
/******************************Public*Routine******************************\
|
|
* BOOL DrvCopyBits
|
|
*
|
|
* Do fast bitmap copies.
|
|
*
|
|
* Note that GDI will (usually) automatically adjust the blt extents to
|
|
* adjust for any rectangular clipping, so we'll rarely see DC_RECT
|
|
* clipping in this routine (and as such, we don't bother special casing
|
|
* it).
|
|
*
|
|
* I'm not sure if the performance benefit from this routine is actually
|
|
* worth the increase in code size, since SRCCOPY BitBlts are hardly the
|
|
* most common drawing operation we'll get. But what the heck.
|
|
*
|
|
* On the ATI it's faster to do straight SRCCOPY bitblt's through the
|
|
* memory aperture than to use the data transfer register; as such, this
|
|
* routine is the logical place to put this special case.
|
|
*
|
|
\**************************************************************************/
|
|
|
|
BOOL DrvCopyBits(
|
|
SURFOBJ* psoDst,
|
|
SURFOBJ* psoSrc,
|
|
CLIPOBJ* pco,
|
|
XLATEOBJ* pxlo,
|
|
RECTL* prclDst,
|
|
POINTL* pptlSrc)
|
|
{
|
|
return(DrvBitBlt(psoDst, psoSrc, NULL, pco, pxlo, prclDst, pptlSrc, NULL,
|
|
NULL, NULL, 0xcccc));
|
|
}
|