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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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