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383 lines
11 KiB
383 lines
11 KiB
/******************************Module*Header*******************************\
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* Module Name: Brush.c
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*
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* Handles all brush/pattern initialization and realization.
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*
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* Copyright (c) 1992-1995 Microsoft Corporation
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*
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\**************************************************************************/
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#include "precomp.h"
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/******************************Public*Routine******************************\
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* VOID vRealizeDitherPattern
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*
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* Generates an 8x8 dither pattern, in our internal realization format, for
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* the colour ulRGBToDither. Note that the high byte of ulRGBToDither does
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* not need to be set to zero, because vComputeSubspaces ignores it.
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\**************************************************************************/
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VOID vRealizeDitherPattern(
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PDEV* ppdev,
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RBRUSH* prb,
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ULONG ulRGBToDither)
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{
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ULONG ulNumVertices;
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VERTEX_DATA vVertexData[4];
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VERTEX_DATA* pvVertexData;
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LONG i;
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// Calculate what colour subspaces are involved in the dither:
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pvVertexData = vComputeSubspaces(ulRGBToDither, vVertexData);
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// Now that we have found the bounding vertices and the number of
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// pixels to dither for each vertex, we can create the dither pattern
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ulNumVertices = (ULONG)(pvVertexData - vVertexData);
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// # of vertices with more than zero pixels in the dither
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// Do the actual dithering:
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vDitherColor(&prb->aulPattern[0], vVertexData, pvVertexData, ulNumVertices);
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// Initialize the fields we need:
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prb->fl = 0;
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prb->pfnFillPat = ppdev->pfnFillPatColor;
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for (i = 0; i < MAX_BOARDS; i++)
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{
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prb->apbe[i] = NULL;
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}
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}
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/******************************Public*Routine******************************\
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* BOOL DrvRealizeBrush
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*
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* This function allows us to convert GDI brushes into an internal form
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* we can use. It may be called directly by GDI at SelectObject time, or
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* it may be called by GDI as a result of us calling BRUSHOBJ_pvGetRbrush
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* to create a realized brush in a function like DrvBitBlt.
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*
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* Note that we have no way of determining what the current Rop or brush
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* alignment are at this point.
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*
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\**************************************************************************/
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BOOL DrvRealizeBrush(
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BRUSHOBJ* pbo,
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SURFOBJ* psoDst,
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SURFOBJ* psoPattern,
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SURFOBJ* psoMask,
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XLATEOBJ* pxlo,
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ULONG iHatch)
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{
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PDEV* ppdev;
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ULONG iPatternFormat;
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BYTE* pjSrc;
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BYTE* pjDst;
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LONG lSrcDelta;
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LONG cj;
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LONG i;
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LONG j;
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RBRUSH* prb;
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ULONG* pulXlate;
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SURFOBJ* psoPunt;
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RECTL rclDst;
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BOOL b;
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ppdev = (PDEV*) psoDst->dhpdev;
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// We have a fast path for dithers when we set GCAPS_DITHERONREALIZE:
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if (iHatch & RB_DITHERCOLOR)
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{
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// Implementing DITHERONREALIZE increased our score on a certain
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// unmentionable benchmark by 0.4 million 'megapixels'. Too bad
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// this didn't work in the first version of NT.
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prb = BRUSHOBJ_pvAllocRbrush(pbo,
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sizeof(RBRUSH) + (TOTAL_BRUSH_SIZE * ppdev->cjPelSize));
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if (prb == NULL)
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goto ReturnFalse;
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vRealizeDitherPattern(ppdev, prb, iHatch);
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goto ReturnTrue;
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}
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// We only accelerate 8x8 patterns. Since Win3.1 and Chicago don't
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// support patterns of any other size, it's a safe bet that 99.9%
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// of the patterns we'll ever get will be 8x8:
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if ((psoPattern->sizlBitmap.cx != 8) ||
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(psoPattern->sizlBitmap.cy != 8))
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goto ReturnFalse;
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if (!(ppdev->flCaps & CAPS_COLOR_PATTERNS))
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{
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// If for whatever reason we can't support colour patterns in
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// this mode, the only alternative left is to support
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// monochrome patterns:
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if (!(ppdev->flCaps & CAPS_MONOCHROME_PATTERNS) ||
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(psoPattern->iBitmapFormat != BMF_1BPP))
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goto ReturnFalse;
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}
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iPatternFormat = psoPattern->iBitmapFormat;
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prb = BRUSHOBJ_pvAllocRbrush(pbo,
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sizeof(RBRUSH) + (TOTAL_BRUSH_SIZE * ppdev->cjPelSize));
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if (prb == NULL)
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goto ReturnFalse;
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// Initialize the fields we need:
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prb->fl = 0;
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prb->pfnFillPat = ppdev->pfnFillPatColor;
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for (i = 0; i < MAX_BOARDS; i++)
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{
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prb->apbe[i] = NULL;
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}
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lSrcDelta = psoPattern->lDelta;
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pjSrc = (BYTE*) psoPattern->pvScan0;
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pjDst = (BYTE*) &prb->aulPattern[0];
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if ((ppdev->iBitmapFormat == iPatternFormat) &&
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((pxlo == NULL) || (pxlo->flXlate & XO_TRIVIAL)))
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{
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DISPDBG((1, "Realizing un-translated brush"));
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// The pattern is the same colour depth as the screen, and
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// there's no translation to be done:
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cj = (8 * ppdev->cjPelSize); // Every pattern is 8 pels wide
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for (i = 8; i != 0; i--)
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{
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RtlCopyMemory(pjDst, pjSrc, cj);
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pjSrc += lSrcDelta;
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pjDst += cj;
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}
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}
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else if ((iPatternFormat == BMF_1BPP) &&
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(ppdev->flCaps & CAPS_MONOCHROME_PATTERNS))
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{
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DISPDBG((1, "Realizing 1bpp brush"));
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for (i = 8; i != 0; i--)
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{
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*pjDst = *pjSrc;
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pjDst++;
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pjSrc += lSrcDelta;
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}
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pulXlate = pxlo->pulXlate;
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prb->fl |= RBRUSH_2COLOR;
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prb->ulForeColor = pulXlate[1];
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prb->ulBackColor = pulXlate[0];
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prb->ptlBrush.x = 0;
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prb->ptlBrush.y = 0;
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prb->pfnFillPat = ppdev->pfnFillPatMonochrome;
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}
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else if ((iPatternFormat == BMF_4BPP) && (ppdev->iBitmapFormat == BMF_8BPP))
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{
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DISPDBG((1, "Realizing 4bpp brush"));
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// The screen is 8bpp and the pattern is 4bpp:
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ASSERTDD((ppdev->iBitmapFormat == BMF_8BPP) &&
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(iPatternFormat == BMF_4BPP),
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"Messed up brush logic");
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pulXlate = pxlo->pulXlate;
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for (i = 8; i != 0; i--)
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{
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// Inner loop is repeated only 4 times because each loop
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// handles 2 pixels:
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for (j = 4; j != 0; j--)
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{
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*pjDst++ = (BYTE) pulXlate[*pjSrc >> 4];
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*pjDst++ = (BYTE) pulXlate[*pjSrc & 15];
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pjSrc++;
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}
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pjSrc += lSrcDelta - 4;
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}
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}
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else
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{
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// We've got a brush whose format we haven't special cased. No
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// problem, we can have GDI convert it to our device's format.
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// We simply use a temporary surface object that was created with
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// the same format as the display, and point it to our brush
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// realization:
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DISPDBG((5, "Realizing funky brush"));
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psoPunt = ppdev->psoBank;
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psoPunt->pvScan0 = pjDst;
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psoPunt->lDelta = 8 * ppdev->cjPelSize;
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rclDst.left = 0;
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rclDst.top = 0;
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rclDst.right = 8;
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rclDst.bottom = 8;
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b = EngCopyBits(psoPunt, psoPattern, NULL, pxlo,
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&rclDst, (POINTL*) &rclDst);
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if (!b)
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{
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goto ReturnFalse;
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}
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}
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ReturnTrue:
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return(TRUE);
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ReturnFalse:
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if (psoPattern != NULL)
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{
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DISPDBG((1, "Failed realization -- Type: %li Format: %li cx: %li cy: %li",
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psoPattern->iType, psoPattern->iBitmapFormat,
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psoPattern->sizlBitmap.cx, psoPattern->sizlBitmap.cy));
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}
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return(FALSE);
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}
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/******************************Public*Routine******************************\
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* BOOL bEnableBrushCache
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*
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* Allocates off-screen memory for storing the brush cache.
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\**************************************************************************/
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BOOL bEnableBrushCache(
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PDEV* ppdev)
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{
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OH* poh;
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BRUSHENTRY* pbe;
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LONG i;
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LONG x;
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LONG y;
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ULONG ulOffset;
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if ((ppdev->iMachType == MACH_MM_32) || (ppdev->iMachType == MACH_IO_32))
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{
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if (ppdev->iBitmapFormat == BMF_8BPP)
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{
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// All Mach8 and Mach32 cards can handle colour patterns in
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// the hardware when running at 8bpp:
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ppdev->flCaps |= CAPS_COLOR_PATTERNS;
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}
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if ((ppdev->iAsic == ASIC_68800_6) || (ppdev->iAsic == ASIC_68800AX))
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{
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// Some Mach32 ASICs can handle 8x8 monochrome patterns directly
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// in the hardware:
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ppdev->flCaps |= CAPS_MONOCHROME_PATTERNS;
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}
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}
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else
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{
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ASSERTDD(ppdev->iMachType == MACH_MM_64, "Weird other case?");
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// All Mach64's can handle 8x8 monochrome patterns directly:
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ppdev->flCaps |= CAPS_MONOCHROME_PATTERNS;
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// Allocate some off-screen memory for a brush cache:
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if (ppdev->cxMemory >= TOTAL_BRUSH_SIZE * TOTAL_BRUSH_COUNT)
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{
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poh = pohAllocate(ppdev, NULL, ppdev->cxMemory, 1,
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FLOH_MAKE_PERMANENT);
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if (poh != NULL)
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{
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ppdev->flCaps |= CAPS_COLOR_PATTERNS;
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pbe = &ppdev->abe[0]; // Points to where we'll put the first
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// brush cache entry
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x = poh->x;
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y = poh->y;
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for (i = TOTAL_BRUSH_COUNT; i != 0; i--)
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{
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// If we hadn't allocated 'ppdev' so that it was zero
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// initialized, we would have to initialize pbe->prbVerify
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// too...
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pbe->x = x;
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pbe->y = y;
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// !!! Test at 24bpp on banked Mach64!
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ulOffset = ((y * ppdev->lDelta) + (x * ppdev->cjPelSize)
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+ ppdev->ulTearOffset) >> 3;
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// The pitch of the brush is 8 pixels, and must be scaled
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// up by 8:
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if (ppdev->iBitmapFormat != BMF_24BPP)
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pbe->ulOffsetPitch = PACKPAIR(ulOffset, 8 * 8);
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else
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pbe->ulOffsetPitch = PACKPAIR(ulOffset, 3 * 8 * 8); // 24bpp is actually 8bpp internally
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x += TOTAL_BRUSH_SIZE;
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pbe++;
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}
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}
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}
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}
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return(TRUE);
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}
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/******************************Public*Routine******************************\
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* VOID vDisableBrushCache
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*
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* Cleans up anything done in bEnableBrushCache.
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\**************************************************************************/
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VOID vDisableBrushCache(PDEV* ppdev)
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{
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// We ain't gotta do nothin'
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}
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/******************************Public*Routine******************************\
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* VOID vAssertModeBrushCache
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*
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* Resets the brush cache when we exit out of full-screen.
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\**************************************************************************/
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VOID vAssertModeBrushCache(
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PDEV* ppdev,
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BOOL bEnable)
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{
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BRUSHENTRY* pbe;
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LONG i;
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if (bEnable)
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{
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// Invalidate the brush cache:
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pbe = &ppdev->abe[0];
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for (i = TOTAL_BRUSH_COUNT; i != 0; i--)
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{
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pbe->prbVerify = NULL;
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pbe++;
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}
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}
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}
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