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sync code with last improvements from OpenBSD

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purplerain 2023-08-28 05:57:34 +00:00
commit 88965415ff
Signed by: purplerain
GPG key ID: F42C07F07E2E35B7
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lib/libXrender/src/Tri.c Normal file
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/*
*
* Copyright © 2002 Keith Packard
*
* 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_CONFIG_H
#include <config.h>
#endif
#include "Xrenderint.h"
void
XRenderCompositeTriangles (Display *dpy,
int op,
Picture src,
Picture dst,
_Xconst XRenderPictFormat *maskFormat,
int xSrc,
int ySrc,
_Xconst XTriangle *triangles,
int ntriangle)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
RenderSimpleCheckExtension (dpy, info);
LockDisplay(dpy);
while (ntriangle)
{
xRenderTrianglesReq *req;
int n;
long len;
GetReq(RenderTriangles, req);
req->reqType = (CARD8) info->codes->major_opcode;
req->renderReqType = X_RenderTriangles;
req->op = (CARD8) op;
req->src = (CARD32) src;
req->dst = (CARD32) dst;
req->maskFormat = (CARD32) (maskFormat ? maskFormat->id : 0);
req->xSrc = (INT16) xSrc;
req->ySrc = (INT16) ySrc;
n = ntriangle;
len = ((long) n) * (SIZEOF (xTriangle) >> 2);
if (!dpy->bigreq_size && len > (dpy->max_request_size - req->length)) {
n = (int) ((dpy->max_request_size - req->length) / (SIZEOF (xTriangle) >> 2));
len = ((long)n) * (SIZEOF (xTriangle) >> 2);
}
SetReqLen (req, len, len);
len <<= 2;
DataInt32 (dpy, (_Xconst int *) triangles, len);
ntriangle -= n;
triangles += n;
}
UnlockDisplay(dpy);
SyncHandle();
}
void
XRenderCompositeTriStrip (Display *dpy,
int op,
Picture src,
Picture dst,
_Xconst XRenderPictFormat *maskFormat,
int xSrc,
int ySrc,
_Xconst XPointFixed *points,
int npoint)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
RenderSimpleCheckExtension (dpy, info);
LockDisplay(dpy);
while (npoint > 2)
{
xRenderTriStripReq *req;
int n;
long len;
GetReq(RenderTriStrip, req);
req->reqType = (CARD8) info->codes->major_opcode;
req->renderReqType = X_RenderTriStrip;
req->op = (CARD8) op;
req->src = (CARD32) src;
req->dst = (CARD32) dst;
req->maskFormat = (CARD32) (maskFormat ? maskFormat->id : 0);
req->xSrc = (INT16) xSrc;
req->ySrc = (INT16) ySrc;
n = npoint;
len = ((long) n) * (SIZEOF (xPointFixed) >> 2);
if (!dpy->bigreq_size && len > (dpy->max_request_size - req->length)) {
n = (int) ((dpy->max_request_size - req->length) / (SIZEOF (xPointFixed) >> 2));
len = ((long)n) * (SIZEOF (xPointFixed) >> 2);
}
SetReqLen (req, len, len);
len <<= 2;
DataInt32 (dpy, (_Xconst int *) points, len);
npoint -= (n - 2);
points += (n - 2);
}
UnlockDisplay(dpy);
SyncHandle();
}
void
XRenderCompositeTriFan (Display *dpy,
int op,
Picture src,
Picture dst,
_Xconst XRenderPictFormat *maskFormat,
int xSrc,
int ySrc,
_Xconst XPointFixed *points,
int npoint)
{
XRenderExtDisplayInfo *info = XRenderFindDisplay (dpy);
_Xconst XPointFixed *first = points;
RenderSimpleCheckExtension (dpy, info);
LockDisplay(dpy);
points++;
npoint--;
while (npoint > 1)
{
xRenderTriFanReq *req;
xPointFixed *p;
int n;
long len;
GetReqExtra(RenderTriFan, SIZEOF (xPointFixed), req);
req->reqType = (CARD8) info->codes->major_opcode;
req->renderReqType = X_RenderTriFan;
req->op = (CARD8) op;
req->src = (CARD32) src;
req->dst = (CARD32) dst;
req->maskFormat = (CARD32) (maskFormat ? maskFormat->id : 0);
req->xSrc = (INT16) xSrc;
req->ySrc = (INT16) ySrc;
p = (xPointFixed *) (req + 1);
p->x = first->x;
p->y = first->y;
n = npoint;
len = ((long) n) * (SIZEOF (xPointFixed) >> 2);
if (!dpy->bigreq_size && len > (dpy->max_request_size - req->length)) {
n = (int) ((dpy->max_request_size - req->length) / (SIZEOF (xPointFixed) >> 2));
len = ((long)n) * (SIZEOF (xPointFixed) >> 2);
}
SetReqLen (req, len, len);
len <<= 2;
DataInt32 (dpy, (_Xconst int *) points, len);
npoint -= (n - 1);
points += (n - 1);
}
UnlockDisplay(dpy);
SyncHandle();
}