glamor_polyfillrect.c 3.28 KB
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/*
 * Copyright © 2009 Intel Corporation
 * Copyright © 1998 Keith Packard
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *
 */

#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif

#include "glamor_priv.h"

/** @file glamor_fillspans.c
 *
 * GC PolyFillRect implementation, taken straight from fb_fill.c
 */

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static Bool
_glamor_poly_fill_rect(DrawablePtr drawable,
		      GCPtr gc, int nrect, xRectangle * prect, Bool fallback)
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{
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	int fullX1, fullX2, fullY1, fullY2;
	int xorg, yorg;
	int n;
	register BoxPtr pbox;
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	RegionPtr pClip = fbGetCompositeClip(gc);
	if (gc->fillStyle != FillSolid && gc->fillStyle != FillTiled) {
		goto fail;
	}

	xorg = drawable->x;
	yorg = drawable->y;
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	while (nrect--) {
		fullX1 = prect->x + xorg;
		fullY1 = prect->y + yorg;
		fullX2 = fullX1 + (int) prect->width;
		fullY2 = fullY1 + (int) prect->height;
		prect++;
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		n = REGION_NUM_RECTS(pClip);
		pbox = REGION_RECTS(pClip);
		/*
		 * clip the rectangle to each box in the clip region
		 * this is logically equivalent to calling Intersect(),
		 * but rectangles may overlap each other here.
		 */
		while (n--) {
			int x1 = fullX1;
			int x2 = fullX2;
			int y1 = fullY1;
			int y2 = fullY2;
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			if (pbox->x1 > x1)
				x1 = pbox->x1;
			if (pbox->x2 < x2)
				x2 = pbox->x2;
			if (pbox->y1 > y1)
				y1 = pbox->y1;
			if (pbox->y2 < y2)
				y2 = pbox->y2;
			pbox++;
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			if (x1 >= x2 || y1 >= y2)
				continue;
			if (!glamor_fill(drawable, gc, x1, y1, x2 - x1,
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					 y2 - y1, fallback))
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				goto fail;
		}
	}
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	return TRUE;
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      fail:
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	if (!fallback) return FALSE;
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	glamor_fallback(" to %p (%c)\n",
			drawable, glamor_get_drawable_location(drawable));
	if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW)) {
		if (glamor_prepare_access_gc(gc)) {
			fbPolyFillRect(drawable, gc, nrect, prect);
			glamor_finish_access_gc(gc);
		}
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		glamor_finish_access(drawable, GLAMOR_ACCESS_RW);
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	}
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	return TRUE;
}


void
glamor_poly_fill_rect(DrawablePtr drawable,
		      GCPtr gc, int nrect, xRectangle * prect)
{
	_glamor_poly_fill_rect(drawable, gc, nrect, prect, TRUE);
}

Bool
glamor_poly_fill_rect_nf(DrawablePtr drawable,
		         GCPtr gc, int nrect, xRectangle * prect)
{
	return _glamor_poly_fill_rect(drawable, gc, nrect, prect, FALSE);
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}