Importing xserver from X.Org 7.2RC2

1 files changed, 191 insertions, 0 deletions

diff --git a/xserver/render/mitri.c b/xserver/render/mitri.c
new file mode 100644
index 000000000..374e2fdc7
--- /dev/null
+++ b/xserver/render/mitri.c
@@ -0,0 +1,191 @@
+/*
+ *
+ * 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);
+}