mirror of
https://github.com/X11Libre/xserver.git
synced 2026-04-14 17:18:09 +00:00
R6.6 is the Xorg base-line
This commit is contained in:
Kaleb Keithley
218
cfb/cfbzerarc.c
Normal file
218
cfb/cfbzerarc.c
Normal file
@@ -0,0 +1,218 @@
|
||||
/************************************************************
|
||||
|
||||
Copyright 1989, 1998 The Open Group
|
||||
|
||||
Permission to use, copy, modify, distribute, and sell this software and its
|
||||
documentation for any purpose is hereby granted without fee, provided that
|
||||
the above copyright notice appear in all copies and that both that
|
||||
copyright notice and this permission notice appear in supporting
|
||||
documentation.
|
||||
|
||||
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.
|
||||
|
||||
********************************************************/
|
||||
|
||||
/* $Xorg: cfbzerarc.c,v 1.4 2001/02/09 02:04:39 xorgcvs Exp $ */
|
||||
|
||||
/* Derived from:
|
||||
* "Algorithm for drawing ellipses or hyperbolae with a digital plotter"
|
||||
* by M. L. V. Pitteway
|
||||
* The Computer Journal, November 1967, Volume 10, Number 3, pp. 282-289
|
||||
*/
|
||||
|
||||
#include "X.h"
|
||||
#include "Xprotostr.h"
|
||||
#include "miscstruct.h"
|
||||
#include "gcstruct.h"
|
||||
#include "pixmapstr.h"
|
||||
#include "scrnintstr.h"
|
||||
#include "cfb.h"
|
||||
#include "cfbmskbits.h"
|
||||
#include "mizerarc.h"
|
||||
#include "cfbrrop.h"
|
||||
#include "mi.h"
|
||||
|
||||
#ifdef PIXEL_ADDR
|
||||
|
||||
static void
|
||||
RROP_NAME(cfbZeroArcSS8) (pDraw, pGC, arc)
|
||||
DrawablePtr pDraw;
|
||||
GCPtr pGC;
|
||||
xArc *arc;
|
||||
{
|
||||
miZeroArcRec info;
|
||||
Bool do360;
|
||||
register int x;
|
||||
PixelType *addrp;
|
||||
register PixelType *yorgp, *yorgop;
|
||||
RROP_DECLARE
|
||||
register int yoffset;
|
||||
int npwidth, dyoffset;
|
||||
register int y, a, b, d, mask;
|
||||
register int k1, k3, dx, dy;
|
||||
|
||||
cfbGetPixelWidthAndPointer(pDraw,npwidth, addrp)
|
||||
|
||||
RROP_FETCH_GC (pGC);
|
||||
do360 = miZeroArcSetup(arc, &info, TRUE);
|
||||
yorgp = addrp + ((info.yorg + pDraw->y) * npwidth);
|
||||
yorgop = addrp + ((info.yorgo + pDraw->y) * npwidth);
|
||||
info.xorg += pDraw->x;
|
||||
info.xorgo += pDraw->x;
|
||||
MIARCSETUP();
|
||||
yoffset = y ? npwidth : 0;
|
||||
dyoffset = 0;
|
||||
mask = info.initialMask;
|
||||
if (!(arc->width & 1))
|
||||
{
|
||||
if (mask & 2)
|
||||
RROP_SOLID((yorgp + info.xorgo));
|
||||
if (mask & 8)
|
||||
RROP_SOLID((yorgop + info.xorgo));
|
||||
}
|
||||
if (!info.end.x || !info.end.y)
|
||||
{
|
||||
mask = info.end.mask;
|
||||
info.end = info.altend;
|
||||
}
|
||||
if (do360 && (arc->width == arc->height) && !(arc->width & 1))
|
||||
{
|
||||
register int xoffset = npwidth;
|
||||
PixelType *yorghb = yorgp + (info.h * npwidth) + info.xorg;
|
||||
PixelType *yorgohb = yorghb - info.h;
|
||||
|
||||
yorgp += info.xorg;
|
||||
yorgop += info.xorg;
|
||||
yorghb += info.h;
|
||||
while (1)
|
||||
{
|
||||
RROP_SOLID(yorgp + yoffset + x);
|
||||
RROP_SOLID(yorgp + yoffset - x);
|
||||
RROP_SOLID(yorgop - yoffset - x);
|
||||
RROP_SOLID(yorgop - yoffset + x);
|
||||
if (a < 0)
|
||||
break;
|
||||
RROP_SOLID(yorghb - xoffset - y);
|
||||
RROP_SOLID(yorgohb - xoffset + y);
|
||||
RROP_SOLID(yorgohb + xoffset + y);
|
||||
RROP_SOLID(yorghb + xoffset - y);
|
||||
xoffset += npwidth;
|
||||
MIARCCIRCLESTEP(yoffset += npwidth;);
|
||||
}
|
||||
yorgp -= info.xorg;
|
||||
yorgop -= info.xorg;
|
||||
x = info.w;
|
||||
yoffset = info.h * npwidth;
|
||||
}
|
||||
else if (do360)
|
||||
{
|
||||
while (y < info.h || x < info.w)
|
||||
{
|
||||
MIARCOCTANTSHIFT(dyoffset = npwidth;);
|
||||
RROP_SOLID(yorgp + yoffset + info.xorg + x);
|
||||
RROP_SOLID(yorgp + yoffset + info.xorgo - x);
|
||||
RROP_SOLID(yorgop - yoffset + info.xorgo - x);
|
||||
RROP_SOLID(yorgop - yoffset + info.xorg + x);
|
||||
MIARCSTEP(yoffset += dyoffset;, yoffset += npwidth;);
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
while (y < info.h || x < info.w)
|
||||
{
|
||||
MIARCOCTANTSHIFT(dyoffset = npwidth;);
|
||||
if ((x == info.start.x) || (y == info.start.y))
|
||||
{
|
||||
mask = info.start.mask;
|
||||
info.start = info.altstart;
|
||||
}
|
||||
if (mask & 1)
|
||||
RROP_SOLID(yorgp + yoffset + info.xorg + x);
|
||||
if (mask & 2)
|
||||
RROP_SOLID(yorgp + yoffset + info.xorgo - x);
|
||||
if (mask & 4)
|
||||
RROP_SOLID(yorgop - yoffset + info.xorgo - x);
|
||||
if (mask & 8)
|
||||
RROP_SOLID(yorgop - yoffset + info.xorg + x);
|
||||
if ((x == info.end.x) || (y == info.end.y))
|
||||
{
|
||||
mask = info.end.mask;
|
||||
info.end = info.altend;
|
||||
}
|
||||
MIARCSTEP(yoffset += dyoffset;, yoffset += npwidth;);
|
||||
}
|
||||
}
|
||||
if ((x == info.start.x) || (y == info.start.y))
|
||||
mask = info.start.mask;
|
||||
if (mask & 1)
|
||||
RROP_SOLID(yorgp + yoffset + info.xorg + x);
|
||||
if (mask & 4)
|
||||
RROP_SOLID(yorgop - yoffset + info.xorgo - x);
|
||||
if (arc->height & 1)
|
||||
{
|
||||
if (mask & 2)
|
||||
RROP_SOLID(yorgp + yoffset + info.xorgo - x);
|
||||
if (mask & 8)
|
||||
RROP_SOLID(yorgop - yoffset + info.xorg + x);
|
||||
}
|
||||
}
|
||||
|
||||
void
|
||||
RROP_NAME (cfbZeroPolyArcSS8) (pDraw, pGC, narcs, parcs)
|
||||
register DrawablePtr pDraw;
|
||||
GCPtr pGC;
|
||||
int narcs;
|
||||
xArc *parcs;
|
||||
{
|
||||
register xArc *arc;
|
||||
register int i;
|
||||
BoxRec box;
|
||||
int x2, y2;
|
||||
RegionPtr cclip;
|
||||
|
||||
cclip = cfbGetCompositeClip(pGC);
|
||||
for (arc = parcs, i = narcs; --i >= 0; arc++)
|
||||
{
|
||||
if (miCanZeroArc(arc))
|
||||
{
|
||||
box.x1 = arc->x + pDraw->x;
|
||||
box.y1 = arc->y + pDraw->y;
|
||||
/*
|
||||
* Because box.x2 and box.y2 get truncated to 16 bits, and the
|
||||
* RECT_IN_REGION test treats the resulting number as a signed
|
||||
* integer, the RECT_IN_REGION test alone can go the wrong way.
|
||||
* This can result in a server crash because the rendering
|
||||
* routines in this file deal directly with cpu addresses
|
||||
* of pixels to be stored, and do not clip or otherwise check
|
||||
* that all such addresses are within their respective pixmaps.
|
||||
* So we only allow the RECT_IN_REGION test to be used for
|
||||
* values that can be expressed correctly in a signed short.
|
||||
*/
|
||||
x2 = box.x1 + (int)arc->width + 1;
|
||||
box.x2 = x2;
|
||||
y2 = box.y1 + (int)arc->height + 1;
|
||||
box.y2 = y2;
|
||||
if ( (x2 <= MAXSHORT) && (y2 <= MAXSHORT) &&
|
||||
(RECT_IN_REGION(pDraw->pScreen, cclip, &box) == rgnIN) )
|
||||
RROP_NAME (cfbZeroArcSS8) (pDraw, pGC, arc);
|
||||
else
|
||||
miZeroPolyArc(pDraw, pGC, 1, arc);
|
||||
}
|
||||
else
|
||||
miPolyArc(pDraw, pGC, 1, arc);
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user