xserver-multidpi/glamor/glamor_fillspans.c

/*
 * Copyright © 1998 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_DIX_CONFIG_H
#include <dix-config.h>
#endif

/** @file glamor_fillspans.c
 *
 * FillSpans implementation, taken from fb_fillsp.c
 */
#include "glamor_priv.h"

void
glamor_fill_spans(DrawablePtr drawable,
		  GCPtr	gc,
		  int n,
		  DDXPointPtr points,
		  int *widths,
		  int sorted)
{
    DDXPointPtr ppt;
    int nbox;
    BoxPtr pbox;
    int x1, x2, y;
    int off_x, off_y;
    RegionPtr pClip = fbGetCompositeClip(gc);
    PixmapPtr pixmap = glamor_get_drawable_pixmap(drawable);


    if (gc->fillStyle != FillSolid && gc->fillStyle != FillTiled)
	goto fail;


    glamor_get_drawable_deltas(drawable, pixmap, &off_x, &off_y);
	ppt = points;
        while (n--) {
                x1 = ppt->x;
                y = ppt->y;
                x2 = x1 + (int)*widths;
                ppt++;
                widths++;

                nbox = REGION_NUM_RECTS(pClip);
                pbox = REGION_RECTS(pClip);
                while (nbox--) {
                        if (pbox->y1 > y || pbox->y2 <= y)
                                continue;

                        if (x1 < pbox->x1)
                                x1 = pbox->x1;

                        if (x2 > pbox->x2)
                                x2 = pbox->x2;

                        if (x2 <= x1)
                                continue;
                        glamor_fill (drawable,gc,
                                     x1 + off_x, y + off_y,
                                     x2 - x1 ,  1);
                        pbox++;
                }
        }
    return;
fail:
    glamor_fallback("glamor_fillspans(): to %p (%c)\n", drawable,
		    glamor_get_drawable_location(drawable));
    if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW)) {
	if (glamor_prepare_access_gc(gc)) {
	    fbFillSpans(drawable, gc, n, points, widths, sorted);
	    glamor_finish_access_gc(gc);
	}
	glamor_finish_access(drawable);
    }
}