92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
/*
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* Copyright © 2004 Keith Packard
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that
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* copyright notice and this permission notice appear in supporting
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* documentation, and that the name of Keith Packard not be used in
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* advertising or publicity pertaining to distribution of the software without
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* specific, written prior permission. Keith Packard makes no
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* representations about the suitability of this software for any purpose. It
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* is provided "as is" without express or implied warranty.
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*
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* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifdef HAVE_DIX_CONFIG_H
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#include <dix-config.h>
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#endif
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#include "renderedge.h"
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/*
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* Compute the smallest value no less than y which is on a
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* grid row
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*/
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xFixed
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RenderSampleCeilY (xFixed y, int n)
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{
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return pixman_sample_ceil_y (y, n);
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}
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#define _div(a,b) ((a) >= 0 ? (a) / (b) : -((-(a) + (b) - 1) / (b)))
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/*
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* Compute the largest value no greater than y which is on a
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* grid row
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*/
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xFixed
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RenderSampleFloorY (xFixed y, int n)
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{
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return pixman_sample_floor_y (y, n);
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}
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/*
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* Step an edge by any amount (including negative values)
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*/
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void
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RenderEdgeStep (RenderEdge *e, int n)
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{
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pixman_edge_step (e, n);
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}
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/*
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* Initialize one edge structure given the line endpoints and a
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* starting y value
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*/
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void
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RenderEdgeInit (RenderEdge *e,
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int n,
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xFixed y_start,
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xFixed x_top,
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xFixed y_top,
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xFixed x_bot,
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xFixed y_bot)
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{
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pixman_edge_init (e, n, y_start, x_top, y_top, x_bot, y_bot);
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}
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/*
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* Initialize one edge structure given a line, starting y value
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* and a pixel offset for the line
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*/
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void
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RenderLineFixedEdgeInit (RenderEdge *e,
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int n,
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xFixed y,
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xLineFixed *line,
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int x_off,
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int y_off)
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{
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pixman_line_fixed_edge_init (e, n, y, (pixman_line_fixed_t *)line, x_off, y_off);
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}
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