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371 lines
11 KiB
371 lines
11 KiB
/******************************Module*Header**********************************\
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*
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* *******************
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* * GDI SAMPLE CODE *
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* *******************
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*
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* Module Name: Stroke.c
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*
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* Content: DrvStrokePath support
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*
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* Copyright (c) 1994-1999 3Dlabs Inc. Ltd. All rights reserved.
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* Copyright (c) 1995-2003 Microsoft Corporation. All rights reserved.
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\*****************************************************************************/
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#include "precomp.h"
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#include "glint.h"
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typedef VOID (* GAPFNstripFunc)(PPDEV, STRIP*, LINESTATE*);
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GAPFNstripFunc gapfnStripPXRX[] =
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{
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vPXRXSolidHorizontalLine,
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vPXRXSolidVerticalLine,
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vPXRXSolidDiagonalHorizontalLine,
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vPXRXSolidDiagonalVerticalLine,
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// Should be NUM_STRIP_DRAW_DIRECTIONS = 4 strip drawers in every group
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vPXRXSolidHorizontalLine,
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vPXRXSolidVerticalLine,
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vPXRXSolidDiagonalHorizontalLine,
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vPXRXSolidDiagonalVerticalLine,
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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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vPXRXStyledHorizontalLine,
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vPXRXStyledVerticalLine,
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vPXRXStyledVerticalLine, // Diagonal goes here
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vPXRXStyledVerticalLine, // Diagonal goes here
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vPXRXStyledHorizontalLine,
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vPXRXStyledVerticalLine,
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vPXRXStyledVerticalLine, // Diagonal goes here
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vPXRXStyledVerticalLine, // 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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RECTL arclClip[4]; // For rectangular clipping
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BOOL ResetGLINT; // Does GLINT need resetting?
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BOOL bRet;
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DWORD logicOp;
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GLINT_DECL_VARS;
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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 or if Glint Line debugging has been turned off.
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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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ppdev = (PDEV*) pso->dhpdev;
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GLINT_DECL_INIT;
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REMOVE_SWPOINTER(pso);
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DISPDBG((DBGLVL, "Drawing Lines through GLINT"));
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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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SETUP_PPDEV_OFFSETS(ppdev, pdsurf);
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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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bRet = TRUE;
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apfn = &ppdev->gapfnStrip[NUM_STRIP_DRAW_STYLES * ((fl & FL_STYLE_MASK) >> FL_STYLE_SHIFT)];
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// Set up to enumerate the path:
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if (pco->iDComplexity != DC_COMPLEX)
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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 (pco->iDComplexity == DC_RECT)
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{
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fl |= FL_SIMPLE_CLIP;
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// This is the only clip region of importance to GLINT
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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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pd.flags = 0;
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// Get the logic op and set up the flag to indicate reads from
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// the frame buffer will occur.
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logicOp = GlintLogicOpsFromR2[mix & 0xff];
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if (LogicopReadDest[logicOp])
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fl |= FL_READ;
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// Need to set up Glint modes and colors appropriately for the lines.
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ResetGLINT = (*ppdev->pgfnInitStrips)(ppdev, pbo->iSolidColor,
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logicOp, prclClip);
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PATHOBJ_vEnumStart(ppo);
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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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{
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ls.spNext = 0;
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}
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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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bRet = FALSE;
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goto ResetReturn;
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}
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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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bRet = FALSE;
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goto ResetReturn;
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}
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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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{
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ls.spNext = (ULONG) ls.spNext % (ULONG) ls.spTotal2;
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}
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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[FIELD_OFFSET(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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// Need to set up Glint modes and colors appropriately for the lines.
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// NOTE, with a complex clip, we can not yet use GLINT for fast lines
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ResetGLINT = (*ppdev->pgfnInitStrips)(ppdev, pbo->iSolidColor,
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GlintLogicOpsFromR2[mix & 0xff], NULL);
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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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{
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bRet = FALSE;
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goto ResetReturn;
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}
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}
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} while (bMore);
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}
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ResetReturn:
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if (ResetGLINT)
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{
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(*ppdev->pgfnResetStrips)(ppdev);
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}
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return(bRet);
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}
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