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/*
* Copyright © 2004 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
#include "renderedge.h"
/*
* Compute the smallest value no less than y which is on a
* grid row
*/
xFixed
RenderSampleCeilY (xFixed y, int n)
{
return pixman_sample_ceil_y (y, n);
}
#define _div(a,b) ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b)))
/*
* Compute the largest value no greater than y which is on a
* grid row
*/
xFixed
RenderSampleFloorY (xFixed y, int n)
{
return pixman_sample_floor_y (y, n);
}
/*
* Step an edge by any amount (including negative values)
*/
void
RenderEdgeStep (RenderEdge *e, int n)
{
pixman_edge_step (e, n);
}
/*
* Initialize one edge structure given the line endpoints and a
* starting y value
*/
void
RenderEdgeInit (RenderEdge *e,
int n,
xFixed y_start,
xFixed x_top,
xFixed y_top,
xFixed x_bot,
xFixed y_bot)
{
pixman_edge_init (e, n, y_start, x_top, y_top, x_bot, y_bot);
}
/*
* Initialize one edge structure given a line, starting y value
* and a pixel offset for the line
*/
void
RenderLineFixedEdgeInit (RenderEdge *e,
int n,
xFixed y,
xLineFixed *line,
int x_off,
int y_off)
{
pixman_line_fixed_edge_init (e, n, y, (pixman_line_fixed_t *)line, x_off, y_off);
}
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