443 lines
13 KiB
C
443 lines
13 KiB
C
/******************************Module*Header*******************************\
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* Module Name: Stroke.c
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*
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* DrvStrokePath for S3 driver
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*
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* Copyright (c) 1992-1994 Microsoft Corporation
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\**************************************************************************/
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#include "precomp.h"
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VOID (*gapfnStrip[])(PDEV*, STRIP*, LINESTATE*) = {
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vrlSolidHorizontal,
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vrlSolidVertical,
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vrlSolidDiagonalHorizontal,
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vrlSolidDiagonalVertical,
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// Should be NUM_STRIP_DRAW_DIRECTIONS = 4 strip drawers in every group
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vssSolidHorizontal,
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vssSolidVertical,
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vssSolidDiagonalHorizontal,
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vssSolidDiagonalVertical,
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// Should be NUM_STRIP_DRAW_STYLES = 8 strip drawers in total for doing
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// solid lines, and the same number for non-solid lines:
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vStripStyledHorizontal,
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vStripStyledVertical,
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vStripStyledVertical, // Diagonal goes here
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vStripStyledVertical, // Diagonal goes here
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vStripStyledHorizontal,
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vStripStyledVertical,
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vStripStyledVertical, // Diagonal goes here
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vStripStyledVertical, // Diagonal goes here
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};
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// Style array for alternate style (alternates one pixel on, one pixel off):
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STYLEPOS gaspAlternateStyle[] = { 1 };
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/******************************Public*Routine******************************\
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* BOOL DrvStrokePath(pso, ppo, pco, pxo, pbo, pptlBrush, pla, mix)
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*
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* Strokes the path.
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*
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\**************************************************************************/
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BOOL DrvStrokePath(
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SURFOBJ* pso,
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PATHOBJ* ppo,
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CLIPOBJ* pco,
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XFORMOBJ* pxo,
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BRUSHOBJ* pbo,
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POINTL* pptlBrush,
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LINEATTRS* pla,
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MIX mix)
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{
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STYLEPOS aspLtoR[STYLE_MAX_COUNT];
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STYLEPOS aspRtoL[STYLE_MAX_COUNT];
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LINESTATE ls;
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PFNSTRIP* apfn;
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FLONG fl;
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PDEV* ppdev;
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DSURF* pdsurf;
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OH* poh;
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ULONG ulHwMix;
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RECTL arclClip[4]; // For rectangular clipping
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RECTL rclBounds;
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RECTFX rcfxBounds;
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// Pass the surface off to GDI if it's a device bitmap that we've
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// converted to a DIB:
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pdsurf = (DSURF*) pso->dhsurf;
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if (pdsurf->dt == DT_DIB)
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{
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return(EngStrokePath(pdsurf->pso, ppo, pco, pxo, pbo, pptlBrush,
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pla, mix));
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}
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// We'll be drawing to the screen or an off-screen DFB; copy the surface's
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// offset now so that we won't need to refer to the DSURF again:
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poh = pdsurf->poh;
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ppdev = (PDEV*) pso->dhpdev;
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ppdev->xOffset = poh->x;
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ppdev->yOffset = poh->y;
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ulHwMix = gajHwMixFromMix[mix & 0xf];
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// x86 has special case ASM code for accelerating solid lines:
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#if defined(i386)
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if ((pla->pstyle == NULL) && !(pla->fl & LA_ALTERNATE))
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{
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// We can accelerate solid lines:
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if (pco->iDComplexity == DC_TRIVIAL)
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{
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ppdev->pfnFastLine(ppdev, ppo, NULL, &gapfnStrip[0], 0,
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pbo->iSolidColor, ulHwMix);
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return(TRUE);
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}
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else if (pco->iDComplexity == DC_RECT)
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{
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// We have to be sure that we don't overflow the hardware registers
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// for current position, line length, or DDA terms. We check
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// here to make sure that the current position and line length
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// values won't overflow (for integer lines, this check is
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// sufficient to ensure that the DDA terms won't overflow; for GIQ
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// lines, we specifically check on every line in pfnFastLine that we
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// don't overflow).
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PATHOBJ_vGetBounds(ppo, &rcfxBounds);
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if (rcfxBounds.xLeft + (ppdev->xOffset * F)
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>= (MIN_INTEGER_BOUND * F) &&
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rcfxBounds.xRight + (ppdev->xOffset * F)
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<= (MAX_INTEGER_BOUND * F) &&
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rcfxBounds.yTop + (ppdev->yOffset * F)
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>= (MIN_INTEGER_BOUND * F) &&
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rcfxBounds.yBottom + (ppdev->yOffset * F)
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<= (MAX_INTEGER_BOUND * F))
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{
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// Since we're going to be using the scissors registers to
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// do hardware clipping, we'll also have to make sure we don't
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// exceed its bounds. ATI chips have a maximum limit of 1023,
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// which we could exceed if we're running at 1280x1024, or for
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// off-screen device bitmaps.
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if ((pco->rclBounds.right + ppdev->xOffset < 1024) &&
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(pco->rclBounds.bottom + ppdev->yOffset < 1024))
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{
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arclClip[0] = pco->rclBounds;
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// FL_FLIP_D:
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arclClip[1].top = pco->rclBounds.left;
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arclClip[1].left = pco->rclBounds.top;
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arclClip[1].bottom = pco->rclBounds.right;
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arclClip[1].right = pco->rclBounds.bottom;
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// FL_FLIP_V:
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arclClip[2].top = -pco->rclBounds.bottom + 1;
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arclClip[2].left = pco->rclBounds.left;
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arclClip[2].bottom = -pco->rclBounds.top + 1;
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arclClip[2].right = pco->rclBounds.right;
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// FL_FLIP_V | FL_FLIP_D:
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arclClip[3].top = pco->rclBounds.left;
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arclClip[3].left = -pco->rclBounds.bottom + 1;
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arclClip[3].bottom = pco->rclBounds.right;
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arclClip[3].right = -pco->rclBounds.top + 1;
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rclBounds.left = pco->rclBounds.left;
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rclBounds.top = pco->rclBounds.top;
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rclBounds.right = pco->rclBounds.right;
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rclBounds.bottom = pco->rclBounds.bottom;
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vSetClipping(ppdev, &rclBounds);
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ppdev->pfnFastLine(ppdev, ppo, &arclClip[0], &gapfnStrip[0],
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FL_SIMPLE_CLIP, pbo->iSolidColor, ulHwMix);
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vResetClipping(ppdev);
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return(TRUE);
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}
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}
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}
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}
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#endif // i386
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// Get the device ready:
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if (DEPTH32(ppdev))
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{
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IO_FIFO_WAIT(ppdev, 4);
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MM_FRGD_COLOR32(ppdev, ppdev->pjMmBase, pbo->iSolidColor);
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}
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else
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{
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IO_FIFO_WAIT(ppdev, 3);
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IO_FRGD_COLOR(ppdev, pbo->iSolidColor);
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}
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IO_FRGD_MIX(ppdev, FOREGROUND_COLOR | ulHwMix);
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IO_PIX_CNTL(ppdev, ALL_ONES);
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fl = 0;
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// Look after styling initialization:
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if (pla->fl & LA_ALTERNATE)
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{
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ls.cStyle = 1;
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ls.spTotal = 1;
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ls.spTotal2 = 2;
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ls.spRemaining = 1;
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ls.aspRtoL = &gaspAlternateStyle[0];
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ls.aspLtoR = &gaspAlternateStyle[0];
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ls.spNext = HIWORD(pla->elStyleState.l);
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ls.xyDensity = 1;
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fl |= FL_ARBITRARYSTYLED;
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ls.ulStartMask = 0L;
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}
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else if (pla->pstyle != (FLOAT_LONG*) NULL)
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{
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PFLOAT_LONG pstyle;
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STYLEPOS* pspDown;
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STYLEPOS* pspUp;
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pstyle = &pla->pstyle[pla->cstyle];
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ls.xyDensity = STYLE_DENSITY;
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ls.spTotal = 0;
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while (pstyle-- > pla->pstyle)
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{
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ls.spTotal += pstyle->l;
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}
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ls.spTotal *= STYLE_DENSITY;
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ls.spTotal2 = 2 * ls.spTotal;
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// Compute starting style position (this is guaranteed not to overflow):
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ls.spNext = HIWORD(pla->elStyleState.l) * STYLE_DENSITY +
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LOWORD(pla->elStyleState.l);
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fl |= FL_ARBITRARYSTYLED;
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ls.cStyle = pla->cstyle;
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ls.aspRtoL = aspRtoL;
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ls.aspLtoR = aspLtoR;
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if (pla->fl & LA_STARTGAP)
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ls.ulStartMask = 0xffffffffL;
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else
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ls.ulStartMask = 0L;
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pstyle = pla->pstyle;
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pspDown = &ls.aspRtoL[ls.cStyle - 1];
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pspUp = &ls.aspLtoR[0];
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while (pspDown >= &ls.aspRtoL[0])
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{
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*pspDown = pstyle->l * STYLE_DENSITY;
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*pspUp = *pspDown;
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pspUp++;
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pspDown--;
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pstyle++;
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}
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}
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apfn = &gapfnStrip[NUM_STRIP_DRAW_STYLES *
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((fl & FL_STYLE_MASK) >> FL_STYLE_SHIFT)];
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// Set up to enumerate the path:
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#if defined(i386)
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// x86 ASM bLines supports DC_RECT clipping:
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if (pco->iDComplexity != DC_COMPLEX)
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#else
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// Non-x86 ASM bLines don't support DC_RECT clipping:
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if (pco->iDComplexity == DC_TRIVIAL)
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#endif
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{
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PATHDATA pd;
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RECTL* prclClip = (RECTL*) NULL;
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BOOL bMore;
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ULONG cptfx;
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POINTFIX ptfxStartFigure;
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POINTFIX ptfxLast;
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POINTFIX* pptfxFirst;
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POINTFIX* pptfxBuf;
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#if defined(i386)
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if (pco->iDComplexity == DC_RECT)
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{
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fl |= FL_SIMPLE_CLIP;
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arclClip[0] = pco->rclBounds;
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// FL_FLIP_D:
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arclClip[1].top = pco->rclBounds.left;
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arclClip[1].left = pco->rclBounds.top;
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arclClip[1].bottom = pco->rclBounds.right;
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arclClip[1].right = pco->rclBounds.bottom;
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// FL_FLIP_V:
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arclClip[2].top = -pco->rclBounds.bottom + 1;
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arclClip[2].left = pco->rclBounds.left;
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arclClip[2].bottom = -pco->rclBounds.top + 1;
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arclClip[2].right = pco->rclBounds.right;
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// FL_FLIP_V | FL_FLIP_D:
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arclClip[3].top = pco->rclBounds.left;
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arclClip[3].left = -pco->rclBounds.bottom + 1;
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arclClip[3].bottom = pco->rclBounds.right;
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arclClip[3].right = -pco->rclBounds.top + 1;
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prclClip = arclClip;
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}
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#endif // i386
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pd.flags = 0;
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do {
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bMore = PATHOBJ_bEnum(ppo, &pd);
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cptfx = pd.count;
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if (cptfx == 0)
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{
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break;
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}
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if (pd.flags & PD_BEGINSUBPATH)
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{
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ptfxStartFigure = *pd.pptfx;
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pptfxFirst = pd.pptfx;
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pptfxBuf = pd.pptfx + 1;
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cptfx--;
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}
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else
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{
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pptfxFirst = &ptfxLast;
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pptfxBuf = pd.pptfx;
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}
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if (pd.flags & PD_RESETSTYLE)
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ls.spNext = 0;
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if (cptfx > 0)
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{
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if (!bLines(ppdev,
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pptfxFirst,
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pptfxBuf,
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(RUN*) NULL,
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cptfx,
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&ls,
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prclClip,
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apfn,
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fl))
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return(FALSE);
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}
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ptfxLast = pd.pptfx[pd.count - 1];
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if (pd.flags & PD_CLOSEFIGURE)
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{
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if (!bLines(ppdev,
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&ptfxLast,
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&ptfxStartFigure,
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(RUN*) NULL,
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1,
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&ls,
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prclClip,
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apfn,
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fl))
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return(FALSE);
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}
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} while (bMore);
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if (fl & FL_STYLED)
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{
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// Save the style state:
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ULONG ulHigh;
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ULONG ulLow;
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// Masked styles don't normalize the style state. It's a good
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// thing to do, so let's do it now:
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if ((ULONG) ls.spNext >= (ULONG) ls.spTotal2)
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ls.spNext = (ULONG) ls.spNext % (ULONG) ls.spTotal2;
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ulHigh = ls.spNext / ls.xyDensity;
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ulLow = ls.spNext % ls.xyDensity;
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pla->elStyleState.l = MAKELONG(ulLow, ulHigh);
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}
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}
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else
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{
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// Local state for path enumeration:
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BOOL bMore;
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union {
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BYTE aj[offsetof(CLIPLINE, arun) + RUN_MAX * sizeof(RUN)];
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CLIPLINE cl;
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} cl;
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fl |= FL_COMPLEX_CLIP;
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// We use the clip object when non-simple clipping is involved:
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PATHOBJ_vEnumStartClipLines(ppo, pco, pso, pla);
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do {
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bMore = PATHOBJ_bEnumClipLines(ppo, sizeof(cl), &cl.cl);
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if (cl.cl.c != 0)
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{
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if (fl & FL_STYLED)
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{
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ls.spComplex = HIWORD(cl.cl.lStyleState) * ls.xyDensity
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+ LOWORD(cl.cl.lStyleState);
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}
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if (!bLines(ppdev,
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&cl.cl.ptfxA,
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&cl.cl.ptfxB,
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&cl.cl.arun[0],
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cl.cl.c,
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&ls,
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(RECTL*) NULL,
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apfn,
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fl))
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return(FALSE);
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}
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} while (bMore);
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}
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return(TRUE);
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}
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