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/*
*
* Copyright © 2002 Keith Packard, member of The XFree86 Project, Inc.
*
* 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.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include "scrnintstr.h"
#include "gcstruct.h"
#include "pixmapstr.h"
#include "windowstr.h"
#include "mi.h"
#include "picturestr.h"
#include "mipict.h"
void
miPointFixedBounds(int npoint, xPointFixed * points, BoxPtr bounds)
{
bounds->x1 = xFixedToInt(points->x);
bounds->x2 = xFixedToInt(xFixedCeil(points->x));
bounds->y1 = xFixedToInt(points->y);
bounds->y2 = xFixedToInt(xFixedCeil(points->y));
points++;
npoint--;
while (npoint-- > 0) {
INT16 x1 = xFixedToInt(points->x);
INT16 x2 = xFixedToInt(xFixedCeil(points->x));
INT16 y1 = xFixedToInt(points->y);
INT16 y2 = xFixedToInt(xFixedCeil(points->y));
if (x1 < bounds->x1)
bounds->x1 = x1;
else if (x2 > bounds->x2)
bounds->x2 = x2;
if (y1 < bounds->y1)
bounds->y1 = y1;
else if (y2 > bounds->y2)
bounds->y2 = y2;
points++;
}
}
void
miTriangleBounds(int ntri, xTriangle * tris, BoxPtr bounds)
{
miPointFixedBounds(ntri * 3, (xPointFixed *) tris, bounds);
}
void
miTriangles(CARD8 op,
PicturePtr pSrc,
PicturePtr pDst,
PictFormatPtr maskFormat,
INT16 xSrc, INT16 ySrc, int ntri, xTriangle * tris)
{
ScreenPtr pScreen = pDst->pDrawable->pScreen;
PictureScreenPtr ps = GetPictureScreen(pScreen);
/*
* Check for solid alpha add
*/
if (op == PictOpAdd && miIsSolidAlpha(pSrc)) {
(*ps->AddTriangles) (pDst, 0, 0, ntri, tris);
}
else if (maskFormat) {
BoxRec bounds;
PicturePtr pPicture;
INT16 xDst, yDst;
INT16 xRel, yRel;
xDst = tris[0].p1.x >> 16;
yDst = tris[0].p1.y >> 16;
miTriangleBounds(ntri, tris, &bounds);
if (bounds.x2 <= bounds.x1 || bounds.y2 <= bounds.y1)
return;
pPicture = miCreateAlphaPicture(pScreen, pDst, maskFormat,
bounds.x2 - bounds.x1,
bounds.y2 - bounds.y1);
if (!pPicture)
return;
(*ps->AddTriangles) (pPicture, -bounds.x1, -bounds.y1, ntri, tris);
xRel = bounds.x1 + xSrc - xDst;
yRel = bounds.y1 + ySrc - yDst;
CompositePicture(op, pSrc, pPicture, pDst,
xRel, yRel, 0, 0, bounds.x1, bounds.y1,
bounds.x2 - bounds.x1, bounds.y2 - bounds.y1);
FreePicture(pPicture, 0);
}
else {
if (pDst->polyEdge == PolyEdgeSharp)
maskFormat = PictureMatchFormat(pScreen, 1, PICT_a1);
else
maskFormat = PictureMatchFormat(pScreen, 8, PICT_a8);
for (; ntri; ntri--, tris++)
miTriangles(op, pSrc, pDst, maskFormat, xSrc, ySrc, 1, tris);
}
}
void
miTriStrip(CARD8 op,
PicturePtr pSrc,
PicturePtr pDst,
PictFormatPtr maskFormat,
INT16 xSrc, INT16 ySrc, int npoint, xPointFixed * points)
{
ScreenPtr pScreen = pDst->pDrawable->pScreen;
PictureScreenPtr ps = GetPictureScreen(pScreen);
xTriangle *tris, *tri;
int ntri;
if (npoint < 3)
return;
ntri = npoint - 2;
tris = ALLOCATE_LOCAL(ntri * sizeof(xTriangle));
if (!tris)
return;
for (tri = tris; npoint >= 3; npoint--, points++, tri++) {
tri->p1 = points[0];
tri->p2 = points[1];
tri->p3 = points[2];
}
(*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris);
DEALLOCATE_LOCAL(tris);
}
void
miTriFan(CARD8 op,
PicturePtr pSrc,
PicturePtr pDst,
PictFormatPtr maskFormat,
INT16 xSrc, INT16 ySrc, int npoint, xPointFixed * points)
{
ScreenPtr pScreen = pDst->pDrawable->pScreen;
PictureScreenPtr ps = GetPictureScreen(pScreen);
xTriangle *tris, *tri;
xPointFixed *first;
int ntri;
if (npoint < 3)
return;
ntri = npoint - 2;
tris = ALLOCATE_LOCAL(ntri * sizeof(xTriangle));
if (!tris)
return;
first = points++;
for (tri = tris; npoint >= 3; npoint--, points++, tri++) {
tri->p1 = *first;
tri->p2 = points[0];
tri->p3 = points[1];
}
(*ps->Triangles) (op, pSrc, pDst, maskFormat, xSrc, ySrc, ntri, tris);
DEALLOCATE_LOCAL(tris);
}