133 lines
3.6 KiB
C
133 lines
3.6 KiB
C
/*
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*
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* Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
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*
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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, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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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 "scrnintstr.h"
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#include "gcstruct.h"
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#include "pixmapstr.h"
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#include "windowstr.h"
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#include "mi.h"
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#include "picturestr.h"
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#include "mipict.h"
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void
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miPointFixedBounds (int npoint, xPointFixed *points, BoxPtr bounds)
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{
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bounds->x1 = xFixedToInt (points->x);
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bounds->x2 = xFixedToInt (xFixedCeil (points->x));
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bounds->y1 = xFixedToInt (points->y);
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bounds->y2 = xFixedToInt (xFixedCeil (points->y));
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points++;
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npoint--;
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while (npoint-- > 0)
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{
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INT16 x1 = xFixedToInt (points->x);
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INT16 x2 = xFixedToInt (xFixedCeil (points->x));
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INT16 y1 = xFixedToInt (points->y);
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INT16 y2 = xFixedToInt (xFixedCeil (points->y));
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if (x1 < bounds->x1)
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bounds->x1 = x1;
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else if (x2 > bounds->x2)
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bounds->x2 = x2;
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if (y1 < bounds->y1)
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bounds->y1 = y1;
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else if (y2 > bounds->y2)
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bounds->y2 = y2;
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points++;
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}
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}
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void
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miTriangleBounds (int ntri, xTriangle *tris, BoxPtr bounds)
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{
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miPointFixedBounds (ntri * 3, (xPointFixed *) tris, bounds);
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}
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void
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miTriStrip (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pDst,
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PictFormatPtr maskFormat,
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INT16 xSrc,
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INT16 ySrc,
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int npoint,
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xPointFixed *points)
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{
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ScreenPtr pScreen = pDst->pDrawable->pScreen;
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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xTriangle *tris, *tri;
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int ntri;
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if (npoint < 3)
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return;
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ntri = npoint - 2;
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tris = malloc(ntri * sizeof (xTriangle));
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if (!tris)
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return;
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for (tri = tris; npoint >= 3; npoint--, points++, tri++)
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{
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tri->p1 = points[0];
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tri->p2 = points[1];
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tri->p3 = points[2];
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}
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(*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris);
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free(tris);
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}
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void
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miTriFan (CARD8 op,
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PicturePtr pSrc,
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PicturePtr pDst,
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PictFormatPtr maskFormat,
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INT16 xSrc,
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INT16 ySrc,
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int npoint,
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xPointFixed *points)
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{
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ScreenPtr pScreen = pDst->pDrawable->pScreen;
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PictureScreenPtr ps = GetPictureScreen(pScreen);
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xTriangle *tris, *tri;
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xPointFixed *first;
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int ntri;
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if (npoint < 3)
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return;
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ntri = npoint - 2;
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tris = malloc(ntri * sizeof (xTriangle));
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if (!tris)
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return;
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first = points++;
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for (tri = tris; npoint >= 3; npoint--, points++, tri++)
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{
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tri->p1 = *first;
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tri->p2 = points[0];
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tri->p3 = points[1];
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}
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(*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris);
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free(tris);
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}
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