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-rw-r--r--xorg-server/render/mitri.c191
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diff --git a/xorg-server/render/mitri.c b/xorg-server/render/mitri.c
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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 = xalloc (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);
+ xfree (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 = xalloc (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);
+ xfree (tris);
+}