319 lines
6.8 KiB
C
319 lines
6.8 KiB
C
/*
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* $Xorg: cfbply1rct.c,v 1.4 2001/02/09 02:04:38 xorgcvs Exp $
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*
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Copyright 1990, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*
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* Author: Keith Packard, MIT X Consortium
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*/
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#include "X.h"
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#include "gcstruct.h"
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#include "windowstr.h"
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#include "pixmapstr.h"
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#include "regionstr.h"
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#include "scrnintstr.h"
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#include "mistruct.h"
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#include "cfb.h"
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#include "cfbmskbits.h"
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#include "cfbrrop.h"
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void
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RROP_NAME(cfbFillPoly1Rect) (pDrawable, pGC, shape, mode, count, ptsIn)
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DrawablePtr pDrawable;
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GCPtr pGC;
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int shape;
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int mode;
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int count;
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DDXPointPtr ptsIn;
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{
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cfbPrivGCPtr devPriv;
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int nwidth;
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unsigned long *addrl, *addr;
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int maxy;
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int origin;
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register int vertex1, vertex2;
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int c;
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BoxPtr extents;
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int clip;
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int y;
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int *vertex1p, *vertex2p;
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int *endp;
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int x1, x2;
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int dx1, dx2;
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int dy1, dy2;
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int e1, e2;
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int step1, step2;
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int sign1, sign2;
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int h;
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int l, r;
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unsigned long mask, bits = ~((unsigned long)0);
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int nmiddle;
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RROP_DECLARE
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if (mode == CoordModePrevious)
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{
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miFillPolygon (pDrawable, pGC, shape, mode, count, ptsIn);
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return;
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}
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devPriv = cfbGetGCPrivate(pGC);
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#ifdef NO_ONE_RECT
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if (REGION_NUM_RECTS(devPriv->pCompositeClip) != 1)
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{
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miFillPolygon (pDrawable, pGC, shape, mode, count, ptsIn);
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return;
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}
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#endif
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origin = *((int *) &pDrawable->x);
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vertex2 = origin - ((origin & 0x8000) << 1);
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extents = &devPriv->pCompositeClip->extents;
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RROP_FETCH_GCPRIV(devPriv);
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vertex1 = *((int *) &extents->x1) - vertex2;
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vertex2 = *((int *) &extents->x2) - vertex2 - 0x00010001;
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clip = 0;
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y = 32767;
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maxy = 0;
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vertex2p = (int *) ptsIn;
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endp = vertex2p + count;
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if (shape == Convex)
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{
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while (count--)
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{
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c = *vertex2p;
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clip |= (c - vertex1) | (vertex2 - c);
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c = intToY(c);
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if (c < y)
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{
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y = c;
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vertex1p = vertex2p;
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}
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vertex2p++;
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if (c > maxy)
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maxy = c;
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}
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}
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else
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{
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int yFlip = 0;
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dx1 = 1;
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x2 = -1;
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x1 = -1;
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while (count--)
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{
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c = *vertex2p;
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clip |= (c - vertex1) | (vertex2 - c);
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c = intToY(c);
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if (c < y)
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{
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y = c;
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vertex1p = vertex2p;
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}
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vertex2p++;
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if (c > maxy)
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maxy = c;
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if (c == x1)
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continue;
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if (dx1 > 0)
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{
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if (x2 < 0)
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x2 = c;
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else
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dx2 = dx1 = (c - x1) >> 31;
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}
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else
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if ((c - x1) >> 31 != dx1)
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{
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dx1 = ~dx1;
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yFlip++;
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}
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x1 = c;
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}
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x1 = (x2 - c) >> 31;
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if (x1 != dx1)
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yFlip++;
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if (x1 != dx2)
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yFlip++;
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if (yFlip != 2)
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clip = 0x8000;
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}
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if (y == maxy)
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return;
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if (clip & 0x80008000)
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{
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miFillPolygon (pDrawable, pGC, shape, mode, vertex2p - (int *) ptsIn, ptsIn);
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return;
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}
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#define AddrYPlus(a,y) (unsigned long *) (((unsigned char *) (a)) + (y) * nwidth)
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cfbGetTypedWidthAndPointer(pDrawable, nwidth, addrl, unsigned char, unsigned long);
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addrl = AddrYPlus(addrl,y + pDrawable->y);
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origin = intToX(origin);
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vertex2p = vertex1p;
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vertex2 = vertex1 = *vertex2p++;
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if (vertex2p == endp)
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vertex2p = (int *) ptsIn;
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#define Setup(c,x,vertex,dx,dy,e,sign,step) {\
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x = intToX(vertex); \
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if (dy = intToY(c) - y) { \
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dx = intToX(c) - x; \
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step = 0; \
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if (dx >= 0) \
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{ \
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e = 0; \
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sign = 1; \
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if (dx >= dy) {\
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step = dx / dy; \
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dx = dx % dy; \
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} \
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} \
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else \
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{ \
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e = 1 - dy; \
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sign = -1; \
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dx = -dx; \
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if (dx >= dy) { \
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step = - (dx / dy); \
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dx = dx % dy; \
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} \
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} \
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} \
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x += origin; \
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vertex = c; \
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}
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#define Step(x,dx,dy,e,sign,step) {\
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x += step; \
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if ((e += dx) > 0) \
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{ \
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x += sign; \
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e -= dy; \
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} \
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}
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for (;;)
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{
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if (y == intToY(vertex1))
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{
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do
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{
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if (vertex1p == (int *) ptsIn)
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vertex1p = endp;
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c = *--vertex1p;
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Setup (c,x1,vertex1,dx1,dy1,e1,sign1,step1)
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} while (y >= intToY(vertex1));
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h = dy1;
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}
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else
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{
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Step(x1,dx1,dy1,e1,sign1,step1)
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h = intToY(vertex1) - y;
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}
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if (y == intToY(vertex2))
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{
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do
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{
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c = *vertex2p++;
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if (vertex2p == endp)
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vertex2p = (int *) ptsIn;
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Setup (c,x2,vertex2,dx2,dy2,e2,sign2,step2)
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} while (y >= intToY(vertex2));
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if (dy2 < h)
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h = dy2;
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}
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else
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{
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Step(x2,dx2,dy2,e2,sign2,step2)
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if ((c = (intToY(vertex2) - y)) < h)
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h = c;
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}
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/* fill spans for this segment */
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y += h;
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for (;;)
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{
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l = x1;
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r = x2;
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nmiddle = x2 - x1;
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if (nmiddle < 0)
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{
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nmiddle = -nmiddle;
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l = x2;
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r = x1;
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}
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#if PPW > 1
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c = l & PIM;
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l -= c;
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#endif
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#if PGSZ == 32
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#define LWRD_SHIFT 2
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#else /* PGSZ == 64 */
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#define LWRD_SHIFT 3
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#endif /* PGSZ */
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#if PWSH > LWRD_SHIFT
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l = l >> (PWSH - LWRD_SHIFT);
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#endif
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#if PWSH < LWRD_SHIFT
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l = l << (LWRD_SHIFT - PWSH);
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#endif
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addr = (unsigned long *) (((char *) addrl) + l);
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#if PPW > 1
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if (c + nmiddle < PPW)
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{
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mask = SCRRIGHT (bits,c) ^ SCRRIGHT (bits,c+nmiddle);
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RROP_SOLID_MASK(addr,mask);
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}
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else
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{
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if (c)
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{
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mask = SCRRIGHT(bits, c);
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RROP_SOLID_MASK(addr,mask);
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nmiddle += c - PPW;
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addr++;
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}
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#endif
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nmiddle >>= PWSH;
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while (--nmiddle >= 0) {
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RROP_SOLID(addr); addr++;
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}
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#if PPW > 1
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if (mask = ~SCRRIGHT(bits, r & PIM))
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RROP_SOLID_MASK(addr,mask);
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}
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#endif
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if (!--h)
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break;
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addrl = AddrYPlus (addrl, 1);
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Step(x1,dx1,dy1,e1,sign1,step1)
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Step(x2,dx2,dy2,e2,sign2,step2)
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}
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if (y == maxy)
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break;
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addrl = AddrYPlus (addrl, 1);
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}
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}
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