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-rw-r--r--render/mitri.c352
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diff --git a/render/mitri.c b/render/mitri.c
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+++ b/render/mitri.c
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+/*
+ * $XFree86: xc/programs/Xserver/render/mitri.c,v 1.6 2002/08/12 04:03:21 keithp Exp $
+ *
+ * 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.
+ */
+
+#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
+miRasterizeTriangle (PicturePtr pPicture,
+ xTriangle *tri,
+ int x_off,
+ int y_off)
+{
+ ScreenPtr pScreen = pPicture->pDrawable->pScreen;
+ PictureScreenPtr ps = GetPictureScreen(pScreen);
+ xPointFixed *top, *left, *right, *t;
+ xTrapezoid trap[2];
+
+ top = &tri->p1;
+ left = &tri->p2;
+ right = &tri->p3;
+ if (left->y < top->y) {
+ t = left; left = top; top = t;
+ }
+ if (right->y < top->y) {
+ t = right; right = top; top = t;
+ }
+ if (right->x < left->x) {
+ t = right; right = left; left = t;
+ }
+
+ /*
+ * Two cases:
+ *
+ * + +
+ * / \ / \
+ * / \ / \
+ * / + + \
+ * / -- -- \
+ * / -- -- \
+ * / --- --- \
+ * +-- --+
+ */
+
+ trap[0].top = top->y;
+
+ trap[0].left.p1.x = top->x;
+ trap[0].left.p1.y = trap[0].top;
+ trap[0].left.p2.x = left->x;
+ trap[0].left.p2.y = left->y;
+
+ trap[0].right.p1 = trap[0].left.p1;
+ trap[0].right.p2.x = right->x;
+ trap[0].right.p2.y = right->y;
+
+ if (right->y < left->y)
+ {
+ trap[0].bottom = trap[0].right.p2.y;
+
+ trap[1].top = trap[0].bottom;
+ trap[1].bottom = trap[0].left.p2.y;
+
+ trap[1].left = trap[0].left;
+ trap[1].right.p1 = trap[0].right.p2;
+ trap[1].right.p2 = trap[0].left.p2;
+ }
+ else
+ {
+ trap[0].bottom = trap[0].left.p2.y;
+
+ trap[1].top = trap[0].bottom;
+ trap[1].bottom = trap[0].right.p2.y;
+
+ trap[1].right = trap[0].right;
+ trap[1].left.p1 = trap[0].left.p2;
+ trap[1].left.p2 = trap[0].right.p2;
+ }
+ if (trap[0].top != trap[0].bottom)
+ (*ps->RasterizeTrapezoid) (pPicture, &trap[0], x_off, y_off);
+ if (trap[1].top != trap[1].bottom)
+ (*ps->RasterizeTrapezoid) (pPicture, &trap[1], x_off, y_off);
+}
+
+void
+miTriangles (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int ntri,
+ xTriangle *tris)
+{
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ BoxRec bounds;
+ PicturePtr pPicture = 0;
+ INT16 xDst, yDst;
+ INT16 xRel, yRel;
+
+ xDst = tris[0].p1.x >> 16;
+ yDst = tris[0].p1.y >> 16;
+
+ if (maskFormat)
+ {
+ 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;
+ }
+ for (; ntri; ntri--, tris++)
+ {
+ if (!maskFormat)
+ {
+ miTriangleBounds (1, tris, &bounds);
+ if (bounds.x2 <= bounds.x1 || bounds.y2 <= bounds.y1)
+ continue;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ break;
+ }
+ miRasterizeTriangle (pPicture, tris, -bounds.x1, -bounds.y1);
+ if (!maskFormat)
+ {
+ 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);
+ }
+ /* XXX adjust xSrc and ySrc */
+ }
+ if (maskFormat)
+ {
+ 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);
+ }
+}
+
+void
+miTriStrip (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int npoint,
+ xPointFixed *points)
+{
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ xTriangle tri;
+ BoxRec bounds;
+ PicturePtr pPicture = 0;
+ INT16 xDst, yDst;
+ INT16 xRel, yRel;
+
+ xDst = points[0].x >> 16;
+ yDst = points[0].y >> 16;
+
+ if (npoint < 3)
+ return;
+ if (maskFormat)
+ {
+ miPointFixedBounds (npoint, points, &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;
+ }
+ for (; npoint >= 3; npoint--, points++)
+ {
+ tri.p1 = points[0];
+ tri.p2 = points[1];
+ tri.p3 = points[2];
+ if (!maskFormat)
+ {
+ miTriangleBounds (1, &tri, &bounds);
+ if (bounds.x2 <= bounds.x1 || bounds.y2 <= bounds.y1)
+ continue;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ continue;
+ }
+ miRasterizeTriangle (pPicture, &tri, -bounds.x1, -bounds.y1);
+ if (!maskFormat)
+ {
+ 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);
+ }
+ }
+ if (maskFormat)
+ {
+ 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);
+ }
+}
+
+void
+miTriFan (CARD8 op,
+ PicturePtr pSrc,
+ PicturePtr pDst,
+ PictFormatPtr maskFormat,
+ INT16 xSrc,
+ INT16 ySrc,
+ int npoint,
+ xPointFixed *points)
+{
+ ScreenPtr pScreen = pDst->pDrawable->pScreen;
+ xTriangle tri;
+ BoxRec bounds;
+ PicturePtr pPicture = 0;
+ xPointFixed *first;
+ INT16 xDst, yDst;
+ INT16 xRel, yRel;
+
+ xDst = points[0].x >> 16;
+ yDst = points[0].y >> 16;
+
+ if (npoint < 3)
+ return;
+ if (maskFormat)
+ {
+ miPointFixedBounds (npoint, points, &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;
+ }
+ first = points++;
+ npoint--;
+ for (; npoint >= 2; npoint--, points++)
+ {
+ tri.p1 = *first;
+ tri.p2 = points[0];
+ tri.p3 = points[1];
+ if (!maskFormat)
+ {
+ miTriangleBounds (1, &tri, &bounds);
+ if (bounds.x2 <= bounds.x1 || bounds.y2 <= bounds.y1)
+ continue;
+ pPicture = miCreateAlphaPicture (pScreen, pDst, maskFormat,
+ bounds.x2 - bounds.x1,
+ bounds.y2 - bounds.y1);
+ if (!pPicture)
+ continue;
+ }
+ miRasterizeTriangle (pPicture, &tri, -bounds.x1, -bounds.y1);
+ if (!maskFormat)
+ {
+ 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);
+ }
+ }
+ if (maskFormat)
+ {
+ 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);
+ }
+}
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