264 lines
6.2 KiB
C
264 lines
6.2 KiB
C
/*
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* $Xorg: mfbply1rct.c,v 1.4 2001/02/09 02:05:19 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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/* $XFree86: xc/programs/Xserver/mfb/mfbply1rct.c,v 1.7tsi Exp $ */
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include <stdlib.h>
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#include <X11/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 "mfb.h"
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#include "maskbits.h"
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#if defined(mips) || defined(sparc)
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#define GetHighWord(x) (((int) (x)) >> 16)
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#else
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#define GetHighWord(x) (((int) (x)) / 65536)
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#endif
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#if IMAGE_BYTE_ORDER == MSBFirst
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#define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i))))
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#define coordToInt(x,y) (((x) << 16) | ((y) & 0xffff))
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#define intToX(i) (GetHighWord(i))
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#define intToY(i) ((int) ((short) i))
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#else
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#define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i)))
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#define coordToInt(x,y) (((y) << 16) | ((x) & 0xffff))
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#define intToX(i) ((int) ((short) (i)))
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#define intToY(i) (GetHighWord(i))
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#endif
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void
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MFBFILLPOLY1RECT (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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int nlwidth;
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PixelType *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 = NULL, *vertex2p;
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int *endp;
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int x1 = 0, x2 = 0;
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int dx1 = 0, dx2 = 0;
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int dy1 = 0, dy2 = 0;
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int e1 = 0, e2 = 0;
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int step1 = 0, step2 = 0;
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int sign1 = 0, sign2 = 0;
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int h;
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int l, r;
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PixelType mask, bits = ~((PixelType)0);
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int nmiddle;
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if (mode == CoordModePrevious || shape != Convex ||
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REGION_NUM_RECTS(pGC->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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origin = *((int *) &pDrawable->x);
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vertex2 = origin - ((origin & 0x8000) << 1);
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extents = &pGC->pCompositeClip->extents;
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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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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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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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mfbGetPixelWidthAndPointer(pDrawable, nlwidth, addrl);
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addrl = mfbScanlineDelta(addrl, y + pDrawable->y, nlwidth);
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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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c = l & PIM;
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l -= c;
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l = l >> PWSH;
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addr = addrl + l;
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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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*addr OPEQ 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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*addr OPEQ mask;
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nmiddle += c - PPW;
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addr++;
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}
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nmiddle >>= PWSH;
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Duff (nmiddle, *addr++ EQWHOLEWORD)
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if ((mask = ~SCRRIGHT(bits, r & PIM)))
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*addr OPEQ mask;
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}
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if (!--h)
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break;
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mfbScanlineInc(addrl, nlwidth);
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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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mfbScanlineInc(addrl, nlwidth);
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}
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}
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