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/*
* Copyright 1996 The XFree86 Project
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* 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
* HARM HANEMAAYER 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.
*
* Written by Harm Hanemaayer (H.Hanemaayer@inter.nl.net).
*/
/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaFillArc.c,v 1.4 1999/05/30 03:03:31 dawes Exp $ */
/*
* Filled solid arcs, based on cfbfillarc.c.
*
* Fill arc using calls to low-level span fill. Because the math for
* each span can be done concurrently with the drawing of the span
* with a graphics coprocessor operation, this is faster than just
* using miPolyFillArc, which first calculates all the spans and then
* calls FillSpans.
*
* Clipped arcs are dispatched to FillSpans.
*/
#include "misc.h"
#include "xf86.h"
#include "xf86_ansic.h"
#include "xf86_OSproc.h"
#include "X.h"
#include "scrnintstr.h"
#include "pixmapstr.h"
#include "xf86str.h"
#include "xaa.h"
#include "xaalocal.h"
#include "mifillarc.h"
#include "mi.h"
/*
* This is based on the integer-math versions from mi. Perhaps on a
* Pentium, the floating-point (double)-math version is faster.
*/
static void
XAAFillEllipseSolid(DrawablePtr pDraw, GCPtr pGC, xArc *arc)
{
XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
register int x, y, e;
int yk, xk, ym, xm, dx, dy, xorg, yorg;
int slw;
miFillArcRec info;
(*infoRec->SetupForSolidFill)(infoRec->pScrn, pGC->fgPixel, pGC->alu,
pGC->planemask);
miFillArcSetup(arc, &info);
MIFILLARCSETUP();
if (pGC->miTranslate)
{
xorg += pDraw->x;
yorg += pDraw->y;
}
while (y > 0)
{
MIFILLARCSTEP(slw);
if (slw > 0) {
(*infoRec->SubsequentSolidFillRect)(infoRec->pScrn, xorg - x,
yorg - y, slw, 1);
if (miFillArcLower(slw))
(*infoRec->SubsequentSolidFillRect)(infoRec->pScrn,
xorg - x, yorg + y + dy, slw, 1);
}
}
SET_SYNC_FLAG(infoRec);
}
#define ADDSPAN(l,r) \
if (r >= l) \
(*infoRec->SubsequentSolidFillRect)( \
infoRec->pScrn, l, ya, r - l + 1, 1);
#define ADDSLICESPANS(flip) \
if (!flip) \
{ \
ADDSPAN(xl, xr); \
} \
else \
{ \
xc = xorg - x; \
ADDSPAN(xc, xr); \
xc += slw - 1; \
ADDSPAN(xl, xc); \
}
static void
XAAFillArcSliceSolid(DrawablePtr pDraw, GCPtr pGC, xArc *arc)
{
XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
int yk, xk, ym, xm, dx, dy, xorg, yorg, slw;
register int x, y, e;
miFillArcRec info;
miArcSliceRec slice;
int ya, xl, xr, xc;
(*infoRec->SetupForSolidFill)(infoRec->pScrn, pGC->fgPixel, pGC->alu,
pGC->planemask);
miFillArcSetup(arc, &info);
miFillArcSliceSetup(arc, &slice, pGC);
MIFILLARCSETUP();
slw = arc->height;
if (slice.flip_top || slice.flip_bot)
slw += (arc->height >> 1) + 1;
if (pGC->miTranslate)
{
xorg += pDraw->x;
yorg += pDraw->y;
slice.edge1.x += pDraw->x;
slice.edge2.x += pDraw->x;
}
while (y > 0)
{
MIFILLARCSTEP(slw);
MIARCSLICESTEP(slice.edge1);
MIARCSLICESTEP(slice.edge2);
if (miFillSliceUpper(slice))
{
ya = yorg - y;
MIARCSLICEUPPER(xl, xr, slice, slw);
ADDSLICESPANS(slice.flip_top);
}
if (miFillSliceLower(slice))
{
ya = yorg + y + dy;
MIARCSLICELOWER(xl, xr, slice, slw);
ADDSLICESPANS(slice.flip_bot);
}
}
SET_SYNC_FLAG(infoRec);
}
void
XAAPolyFillArcSolid(pDraw, pGC, narcs, parcs)
DrawablePtr pDraw;
GCPtr pGC;
int narcs;
xArc *parcs;
{
register xArc *arc;
register int i;
int x2, y2;
BoxRec box;
RegionPtr cclip;
cclip = pGC->pCompositeClip;
if(!REGION_NUM_RECTS(cclip))
return;
for (arc = parcs, i = narcs; --i >= 0; arc++)
{
if (miFillArcEmpty(arc))
continue;
if (miCanFillArc(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) )
{
if ((arc->angle2 >= FULLCIRCLE) ||
(arc->angle2 <= -FULLCIRCLE))
XAAFillEllipseSolid(pDraw, pGC, arc);
else
XAAFillArcSliceSolid(pDraw, pGC, arc);
continue;
}
}
miPolyFillArc(pDraw, pGC, 1, arc);
}
}
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