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/*
* Copyright © 1998 Keith Packard
* Copyright © 2012 Intel Corporation
*
* 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, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#include "fb.h"
#include <mi.h>
#include <mizerarc.h>
#include <limits.h>
#define ARC fbArc8
#define BITS BYTE
#define BITS2 CARD16
#define BITS4 CARD32
#include "fbarcbits.h"
#undef BITS
#undef BITS2
#undef BITS4
#undef ARC
#define ARC fbArc16
#define BITS CARD16
#define BITS2 CARD32
#include "fbarcbits.h"
#undef BITS
#undef BITS2
#undef ARC
#define ARC fbArc32
#define BITS CARD32
#include "fbarcbits.h"
#undef BITS
#undef ARC
void
fbPolyArc(DrawablePtr drawable, GCPtr gc, int n, xArc *arc)
{
DBG(("%s x %d, width=%d, fill=%d, line=%d\n",
__FUNCTION__, n, gc->lineWidth, gc->lineStyle, gc->fillStyle));
if (gc->lineWidth == 0) {
void (*raster)(FbBits *dst, FbStride dstStride, int dstBpp,
xArc *arc, int dx, int dy,
FbBits and, FbBits xor);
raster = 0;
if (gc->lineStyle == LineSolid && gc->fillStyle == FillSolid) {
switch (drawable->bitsPerPixel) {
case 8:
raster = fbArc8;
break;
case 16:
raster = fbArc16;
break;
case 32:
raster = fbArc32;
break;
}
}
if (raster) {
FbGCPrivPtr pgc = fb_gc(gc);
FbBits *dst;
FbStride dstStride;
int dstBpp;
int dstXoff, dstYoff;
BoxRec box;
int x2, y2;
fbGetDrawable(drawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
while (n--) {
if (miCanZeroArc(arc)) {
box.x1 = arc->x + drawable->x;
box.y1 = arc->y + drawable->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 <= SHRT_MAX) && (y2 <= SHRT_MAX) &&
(RegionContainsRect(gc->pCompositeClip, &box) == rgnIN)) {
raster(dst, dstStride, dstBpp,
arc, drawable->x + dstXoff,
drawable->y + dstYoff, pgc->and, pgc->xor);
} else
miZeroPolyArc(drawable, gc, 1, arc);
} else
miPolyArc(drawable, gc, 1, arc);
arc++;
}
} else
miZeroPolyArc(drawable, gc, n, arc);
} else
miPolyArc(drawable, gc, n, arc);
}
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