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