/*
** This method fills the portion of the polygon that intersects with the scanline
** Scanline.
*/
static
void
POLYGONFILL_FillScanLineAlternate(
PDC dc,
int ScanLine,
FILL_EDGE* ActiveHead,
SURFOBJ *SurfObj,
PBRUSHOBJ BrushObj,
MIX RopMode )
{
FILL_EDGE *pLeft, *pRight;
if ( !ActiveHead )
return;
pLeft = ActiveHead;
pRight = pLeft->pNext;
ASSERT(pRight);
while ( NULL != pRight )
{
int x1 = pLeft->XIntercept[0];
int x2 = pRight->XIntercept[1];
if ( x2 > x1 )
{
RECTL BoundRect;
BoundRect.top = ScanLine;
BoundRect.bottom = ScanLine + 1;
BoundRect.left = x1;
BoundRect.right = x2;
DPRINT("Fill Line (%d, %d) to (%d, %d)\n",x1, ScanLine, x2, ScanLine);
IntEngLineTo( SurfObj,
dc->CombinedClip,
BrushObj,
x1,
ScanLine,
x2,
ScanLine,
&BoundRect, // Bounding rectangle
RopMode); // MIX
}
pLeft = pRight->pNext;
pRight = pLeft ? pLeft->pNext : NULL;
}
}
BOOL
FASTCALL
IntRectangle(PDC dc,
int LeftRect,
int TopRect,
int RightRect,
int BottomRect)
{
SURFACE *psurf = NULL;
PBRUSH pbrLine, pbrFill;
BOOL ret = FALSE; // Default to failure
RECTL DestRect;
MIX Mix;
PDC_ATTR pdcattr;
POINTL BrushOrigin;
ASSERT ( dc ); // Caller's responsibility to set this up
pdcattr = dc->pdcattr;
// Rectangle Path only.
if ( PATH_IsPathOpen(dc->dclevel) )
{
return PATH_Rectangle ( dc, LeftRect, TopRect, RightRect, BottomRect );
}
/* Make sure rectangle is not inverted */
DestRect.left = min(LeftRect, RightRect);
DestRect.right = max(LeftRect, RightRect);
DestRect.top = min(TopRect, BottomRect);
DestRect.bottom = max(TopRect, BottomRect);
IntLPtoDP(dc, (LPPOINT)&DestRect, 2);
DestRect.left += dc->ptlDCOrig.x;
DestRect.right += dc->ptlDCOrig.x;
DestRect.top += dc->ptlDCOrig.y;
DestRect.bottom += dc->ptlDCOrig.y;
/* In GM_COMPATIBLE, don't include bottom and right edges */
if (pdcattr->iGraphicsMode == GM_COMPATIBLE)
{
DestRect.right--;
DestRect.bottom--;
}
DC_vPrepareDCsForBlit(dc, DestRect, NULL, DestRect);
if (pdcattr->ulDirty_ & (DIRTY_FILL | DC_BRUSH_DIRTY))
DC_vUpdateFillBrush(dc);
if (pdcattr->ulDirty_ & (DIRTY_LINE | DC_PEN_DIRTY))
DC_vUpdateLineBrush(dc);
pbrFill = dc->dclevel.pbrFill;
pbrLine = dc->dclevel.pbrLine;
if (!pbrLine)
{
ret = FALSE;
goto cleanup;
}
psurf = dc->dclevel.pSurface;
if (!psurf)
{
ret = FALSE;
goto cleanup;
}
if (pbrFill)
{
if (!(pbrFill->flAttrs & BR_IS_NULL))
{
BrushOrigin = *((PPOINTL)&pbrFill->ptOrigin);
BrushOrigin.x += dc->ptlDCOrig.x;
BrushOrigin.y += dc->ptlDCOrig.y;
ret = IntEngBitBlt(&psurf->SurfObj,
NULL,
NULL,
dc->rosdc.CombinedClip,
NULL,
&DestRect,
NULL,
NULL,
&dc->eboFill.BrushObject,
&BrushOrigin,
ROP4_FROM_INDEX(R3_OPINDEX_PATCOPY));
}
}
// Draw the rectangle with the current pen
ret = TRUE; // Change default to success
if (!(pbrLine->flAttrs & BR_IS_NULL))
{
Mix = ROP2_TO_MIX(pdcattr->jROP2);
ret = ret && IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
DestRect.left, DestRect.top, DestRect.right, DestRect.top,
&DestRect, // Bounding rectangle
Mix);
ret = ret && IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
DestRect.right, DestRect.top, DestRect.right, DestRect.bottom,
&DestRect, // Bounding rectangle
Mix);
ret = ret && IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
DestRect.right, DestRect.bottom, DestRect.left, DestRect.bottom,
&DestRect, // Bounding rectangle
Mix);
ret = ret && IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
DestRect.left, DestRect.bottom, DestRect.left, DestRect.top,
&DestRect, // Bounding rectangle
Mix);
}
cleanup:
DC_vFinishBlit(dc, NULL);
/* Move current position in DC?
MSDN: The current position is neither used nor updated by Rectangle. */
return ret;
}
BOOL FASTCALL
IntGdiPolygon(PDC dc,
PPOINT Points,
int Count)
{
SURFACE *psurf;
PBRUSH pbrLine, pbrFill;
BOOL ret = FALSE; // Default to failure
RECTL DestRect;
int CurrentPoint;
PDC_ATTR pdcattr;
POINTL BrushOrigin;
// int Left;
// int Top;
ASSERT(dc); // Caller's responsibility to pass a valid dc
if (!Points || Count < 2 )
{
EngSetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
/*
// Find start x, y
Left = Points[0].x;
Top = Points[0].y;
for (CurrentPoint = 1; CurrentPoint < Count; ++CurrentPoint) {
Left = min(Left, Points[CurrentPoint].x);
Top = min(Top, Points[CurrentPoint].y);
}
*/
pdcattr = dc->pdcattr;
/* Convert to screen coordinates */
IntLPtoDP(dc, Points, Count);
for (CurrentPoint = 0; CurrentPoint < Count; CurrentPoint++)
{
Points[CurrentPoint].x += dc->ptlDCOrig.x;
Points[CurrentPoint].y += dc->ptlDCOrig.y;
}
// No need to have path here.
{
DestRect.left = Points[0].x;
DestRect.right = Points[0].x;
DestRect.top = Points[0].y;
DestRect.bottom = Points[0].y;
for (CurrentPoint = 1; CurrentPoint < Count; ++CurrentPoint)
{
DestRect.left = min(DestRect.left, Points[CurrentPoint].x);
DestRect.right = max(DestRect.right, Points[CurrentPoint].x);
DestRect.top = min(DestRect.top, Points[CurrentPoint].y);
DestRect.bottom = max(DestRect.bottom, Points[CurrentPoint].y);
}
if (pdcattr->ulDirty_ & (DIRTY_FILL | DC_BRUSH_DIRTY))
DC_vUpdateFillBrush(dc);
if (pdcattr->ulDirty_ & (DIRTY_LINE | DC_PEN_DIRTY))
DC_vUpdateLineBrush(dc);
/* Special locking order to avoid lock-ups */
pbrFill = dc->dclevel.pbrFill;
pbrLine = dc->dclevel.pbrLine;
psurf = dc->dclevel.pSurface;
/* FIXME: psurf can be NULL!!!! don't assert but handle this case gracefully! */
ASSERT(psurf);
/* Now fill the polygon with the current fill brush. */
if (!(pbrFill->flAttrs & BR_IS_NULL))
{
BrushOrigin = *((PPOINTL)&pbrFill->ptOrigin);
BrushOrigin.x += dc->ptlDCOrig.x;
BrushOrigin.y += dc->ptlDCOrig.y;
ret = IntFillPolygon (dc,
psurf,
&dc->eboFill.BrushObject,
Points,
Count,
DestRect,
&BrushOrigin);
}
// Draw the Polygon Edges with the current pen ( if not a NULL pen )
if (!(pbrLine->flAttrs & BR_IS_NULL))
{
int i;
for (i = 0; i < Count-1; i++)
{
// DPRINT1("Polygon Making line from (%d,%d) to (%d,%d)\n",
// Points[0].x, Points[0].y,
// Points[1].x, Points[1].y );
ret = IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
Points[i].x, /* From */
Points[i].y,
Points[i+1].x, /* To */
Points[i+1].y,
&DestRect,
ROP2_TO_MIX(pdcattr->jROP2)); /* MIX */
if (!ret) break;
}
/* Close the polygon */
if (ret)
{
ret = IntEngLineTo(&psurf->SurfObj,
dc->rosdc.CombinedClip,
&dc->eboLine.BrushObject,
Points[Count-1].x, /* From */
Points[Count-1].y,
Points[0].x, /* To */
Points[0].y,
&DestRect,
ROP2_TO_MIX(pdcattr->jROP2)); /* MIX */
}
}
}
return ret;
}
// this is highly hacked from W32kPolygon...
BOOL
Polygon ( CONST PPOINT UnsafePoints, int Count, int polyFillMode )
{
BOOL ret;
RECTL DestRect;
int CurrentPoint;
PPOINT Points;
SURFOBJ* SurfObj = 0;
DC dc;
PBRUSHOBJ OutBrushObj = 0;
dc.CombinedClip = 0;
dc.w.polyFillMode = polyFillMode;
DPRINT1("In W32kPolygon()\n");
if ( NULL == UnsafePoints || Count < 2)
{
DPRINT1("ERROR_INVALID_PARAMETER\n");
return FALSE;
}
/* Copy points from userspace to kernelspace */
Points = (PPOINT)EngAllocMem(0, Count * sizeof(POINT));
if (NULL == Points)
{
DPRINT1("ERROR_NOT_ENOUGH_MEMORY\n");
return FALSE;
}
MmCopyFromCaller(Points, UnsafePoints, Count * sizeof(POINT));
if ( memcmp ( Points, UnsafePoints, Count * sizeof(POINT) ) )
{
free(Points);
return FALSE;
}
DestRect.left = Points[0].x;
DestRect.right = Points[0].x;
DestRect.top = Points[0].y;
DestRect.bottom = Points[0].y;
for (CurrentPoint = 1; CurrentPoint < Count; ++CurrentPoint)
{
DestRect.left = MIN(DestRect.left, Points[CurrentPoint].x);
DestRect.right = MAX(DestRect.right, Points[CurrentPoint].x);
DestRect.top = MIN(DestRect.top, Points[CurrentPoint].y);
DestRect.bottom = MAX(DestRect.bottom, Points[CurrentPoint].y);
}
// Draw the Polygon Edges with the current pen
for (CurrentPoint = 0; CurrentPoint < Count; ++CurrentPoint)
{
POINT To, From; //, Next;
/* Let CurrentPoint be i
* if i+1 > Count, Draw a line from Points[i] to Points[0]
* Draw a line from Points[i] to Points[i+1]
*/
From = Points[CurrentPoint];
if ( CurrentPoint + 1 >= Count)
{
To = Points[0];
}
else
{
To = Points[CurrentPoint + 1];
}
DPRINT1("Polygon Making line from (%ld,%ld) to (%ld,%ld)\n", From.x, From.y, To.x, To.y );
IntEngLineTo(SurfObj,
dc.CombinedClip,
OutBrushObj,
From.x,
From.y,
To.x,
To.y,
&DestRect,
EDGE_CHAR); /* MIX */
}
/* determine the fill mode to fill the polygon. */
ret = FillPolygon(&dc, SurfObj, OutBrushObj, FILL_CHAR, Points, Count, DestRect );
free(Points);
return ret;
}
static
void
POLYGONFILL_FillScanLineWinding(
PDC dc,
int ScanLine,
FILL_EDGE* ActiveHead,
SURFOBJ *SurfObj,
PBRUSHOBJ BrushObj,
MIX RopMode )
{
FILL_EDGE *pLeft, *pRight;
int x1, x2, winding = 0;
RECTL BoundRect;
if ( !ActiveHead )
return;
BoundRect.top = ScanLine;
BoundRect.bottom = ScanLine + 1;
pLeft = ActiveHead;
winding = pLeft->YDirection;
pRight = pLeft->pNext;
ASSERT(pRight);
// setup first line...
x1 = pLeft->XIntercept[0];
x2 = pRight->XIntercept[1];
pLeft = pRight;
pRight = pLeft->pNext;
winding += pLeft->YDirection;
while ( NULL != pRight )
{
int newx1 = pLeft->XIntercept[0];
int newx2 = pRight->XIntercept[1];
if ( winding )
{
// check and see if this new line touches the previous...
if ( (newx1 >= x1 && newx1 <= x2)
|| (newx2 >= x1 && newx2 <= x2)
|| (x1 >= newx1 && x1 <= newx2)
|| (x2 >= newx2 && x2 <= newx2)
)
{
// yup, just tack it on to our existing line
x1 = MIN(x1,newx1);
x2 = MAX(x2,newx2);
}
else
{
// nope - render the old line..
BoundRect.left = x1;
BoundRect.right = x2;
DPRINT("Fill Line (%d, %d) to (%d, %d)\n",x1, ScanLine, x2, ScanLine);
IntEngLineTo( SurfObj,
dc->CombinedClip,
BrushObj,
x1,
ScanLine,
x2,
ScanLine,
&BoundRect, // Bounding rectangle
RopMode); // MIX
x1 = newx1;
x2 = newx2;
}
}
pLeft = pRight;
pRight = pLeft->pNext;
winding += pLeft->YDirection;
}
// there will always be a line left-over, render it now...
BoundRect.left = x1;
BoundRect.right = x2;
DPRINT("Fill Line (%d, %d) to (%d, %d)\n",x1, ScanLine, x2, ScanLine);
IntEngLineTo( SurfObj,
dc->CombinedClip,
BrushObj,
x1,
ScanLine,
x2,
ScanLine,
&BoundRect, // Bounding rectangle
RopMode); // MIX
}
