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/*
* $Xorg: mfbply1rct.c,v 1.3 2000/08/17 19:53:35 cpqbld Exp $
*
Copyright 1990, 1998 The Open Group
All Rights Reserved.
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of The Open Group shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from The Open Group.
*
* Author: Keith Packard, MIT X Consortium
*/
/* $XFree86: xc/programs/Xserver/mfb/mfbply1rct.c,v 1.5 2001/01/17 22:37:03 dawes Exp $ */
#include "X.h"
#include "gcstruct.h"
#include "windowstr.h"
#include "pixmapstr.h"
#include "regionstr.h"
#include "scrnintstr.h"
#include "mistruct.h"
#include "mfb.h"
#include "maskbits.h"
#if defined(mips) || defined(sparc)
#define GetHighWord(x) (((int) (x)) >> 16)
#else
#define GetHighWord(x) (((int) (x)) / 65536)
#endif
#if IMAGE_BYTE_ORDER == MSBFirst
#define intToCoord(i,x,y) (((x) = GetHighWord(i)), ((y) = (int) ((short) (i))))
#define coordToInt(x,y) (((x) << 16) | ((y) & 0xffff))
#define intToX(i) (GetHighWord(i))
#define intToY(i) ((int) ((short) i))
#else
#define intToCoord(i,x,y) (((x) = (int) ((short) (i))), ((y) = GetHighWord(i)))
#define coordToInt(x,y) (((y) << 16) | ((x) & 0xffff))
#define intToX(i) ((int) ((short) (i)))
#define intToY(i) (GetHighWord(i))
#endif
void
MFBFILLPOLY1RECT (pDrawable, pGC, shape, mode, count, ptsIn)
DrawablePtr pDrawable;
GCPtr pGC;
int count;
DDXPointPtr ptsIn;
{
int nlwidth;
PixelType *addrl, *addr;
int maxy;
int origin;
register int vertex1, vertex2;
int c;
BoxPtr extents;
int clip;
int y;
int *vertex1p, *vertex2p;
int *endp;
int x1, x2;
int dx1, dx2;
int dy1, dy2;
int e1, e2;
int step1, step2;
int sign1, sign2;
int h;
int l, r;
PixelType mask, bits = ~((PixelType)0);
int nmiddle;
if (mode == CoordModePrevious || shape != Convex ||
REGION_NUM_RECTS(pGC->pCompositeClip) != 1)
{
miFillPolygon (pDrawable, pGC, shape, mode, count, ptsIn);
return;
}
origin = *((int *) &pDrawable->x);
vertex2 = origin - ((origin & 0x8000) << 1);
extents = &pGC->pCompositeClip->extents;
vertex1 = *((int *) &extents->x1) - vertex2;
vertex2 = *((int *) &extents->x2) - vertex2 - 0x00010001;
clip = 0;
y = 32767;
maxy = 0;
vertex2p = (int *) ptsIn;
endp = vertex2p + count;
while (count--)
{
c = *vertex2p;
clip |= (c - vertex1) | (vertex2 - c);
c = intToY(c);
if (c < y)
{
y = c;
vertex1p = vertex2p;
}
vertex2p++;
if (c > maxy)
maxy = c;
}
if (y == maxy)
return;
if (clip & 0x80008000)
{
miFillPolygon (pDrawable, pGC, shape, mode, vertex2p - (int *) ptsIn, ptsIn);
return;
}
mfbGetPixelWidthAndPointer(pDrawable, nlwidth, addrl);
addrl = mfbScanlineDelta(addrl, y + pDrawable->y, nlwidth);
origin = intToX(origin);
vertex2p = vertex1p;
vertex2 = vertex1 = *vertex2p++;
if (vertex2p == endp)
vertex2p = (int *) ptsIn;
#define Setup(c,x,vertex,dx,dy,e,sign,step) {\
x = intToX(vertex); \
if (dy = intToY(c) - y) { \
dx = intToX(c) - x; \
step = 0; \
if (dx >= 0) \
{ \
e = 0; \
sign = 1; \
if (dx >= dy) {\
step = dx / dy; \
dx = dx % dy; \
} \
} \
else \
{ \
e = 1 - dy; \
sign = -1; \
dx = -dx; \
if (dx >= dy) { \
step = - (dx / dy); \
dx = dx % dy; \
} \
} \
} \
x += origin; \
vertex = c; \
}
#define Step(x,dx,dy,e,sign,step) {\
x += step; \
if ((e += dx) > 0) \
{ \
x += sign; \
e -= dy; \
} \
}
for (;;)
{
if (y == intToY(vertex1))
{
do
{
if (vertex1p == (int *) ptsIn)
vertex1p = endp;
c = *--vertex1p;
Setup (c,x1,vertex1,dx1,dy1,e1,sign1,step1)
} while (y >= intToY(vertex1));
h = dy1;
}
else
{
Step(x1,dx1,dy1,e1,sign1,step1)
h = intToY(vertex1) - y;
}
if (y == intToY(vertex2))
{
do
{
c = *vertex2p++;
if (vertex2p == endp)
vertex2p = (int *) ptsIn;
Setup (c,x2,vertex2,dx2,dy2,e2,sign2,step2)
} while (y >= intToY(vertex2));
if (dy2 < h)
h = dy2;
}
else
{
Step(x2,dx2,dy2,e2,sign2,step2)
if ((c = (intToY(vertex2) - y)) < h)
h = c;
}
/* fill spans for this segment */
y += h;
for (;;)
{
l = x1;
r = x2;
nmiddle = x2 - x1;
if (nmiddle < 0)
{
nmiddle = -nmiddle;
l = x2;
r = x1;
}
c = l & PIM;
l -= c;
l = l >> PWSH;
addr = addrl + l;
if (c + nmiddle < PPW)
{
mask = SCRRIGHT (bits,c) ^ SCRRIGHT (bits,c+nmiddle);
*addr OPEQ mask;
}
else
{
if (c)
{
mask = SCRRIGHT(bits, c);
*addr OPEQ mask;
nmiddle += c - PPW;
addr++;
}
nmiddle >>= PWSH;
Duff (nmiddle, *addr++ EQWHOLEWORD)
if (mask = ~SCRRIGHT(bits, r & PIM))
*addr OPEQ mask;
}
if (!--h)
break;
mfbScanlineInc(addrl, nlwidth);
Step(x1,dx1,dy1,e1,sign1,step1)
Step(x2,dx2,dy2,e2,sign2,step2)
}
if (y == maxy)
break;
mfbScanlineInc(addrl, nlwidth);
}
}
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