45e9809aff7304721fddb95654901b32195c9c7avboxsync * Copyright © 2004 Keith Packard
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Permission to use, copy, modify, distribute, and sell this software and its
45e9809aff7304721fddb95654901b32195c9c7avboxsync * documentation for any purpose is hereby granted without fee, provided that
45e9809aff7304721fddb95654901b32195c9c7avboxsync * the above copyright notice appear in all copies and that both that
45e9809aff7304721fddb95654901b32195c9c7avboxsync * copyright notice and this permission notice appear in supporting
45e9809aff7304721fddb95654901b32195c9c7avboxsync * documentation, and that the name of Keith Packard not be used in
45e9809aff7304721fddb95654901b32195c9c7avboxsync * advertising or publicity pertaining to distribution of the software without
45e9809aff7304721fddb95654901b32195c9c7avboxsync * specific, written prior permission. Keith Packard makes no
45e9809aff7304721fddb95654901b32195c9c7avboxsync * representations about the suitability of this software for any purpose. It
45e9809aff7304721fddb95654901b32195c9c7avboxsync * is provided "as is" without express or implied warranty.
45e9809aff7304721fddb95654901b32195c9c7avboxsync * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
45e9809aff7304721fddb95654901b32195c9c7avboxsync * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
45e9809aff7304721fddb95654901b32195c9c7avboxsync * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
45e9809aff7304721fddb95654901b32195c9c7avboxsync * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
45e9809aff7304721fddb95654901b32195c9c7avboxsync * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
45e9809aff7304721fddb95654901b32195c9c7avboxsync * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
45e9809aff7304721fddb95654901b32195c9c7avboxsync * PERFORMANCE OF THIS SOFTWARE.
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define N_Y_FRAC(n) ((n) == 1 ? 1 : (1 << ((n)/2)) - 1)
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define STEP_Y_BIG(n) (xFixed1 - (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define Y_FRAC_LAST(n) (Y_FRAC_FIRST(n) + (N_Y_FRAC(n) - 1) * STEP_Y_SMALL(n))
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define STEP_X_BIG(n) (xFixed1 - (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define X_FRAC_LAST(n) (X_FRAC_FIRST(n) + (N_X_FRAC(n) - 1) * STEP_X_SMALL(n))
45e9809aff7304721fddb95654901b32195c9c7avboxsync#define RenderSamplesX(x,n) ((n) == 1 ? 0 : (xFixedFrac (x) + X_FRAC_FIRST(n)) / STEP_X_SMALL(n))
45e9809aff7304721fddb95654901b32195c9c7avboxsync * An edge structure. This represents a single polygon edge
45e9809aff7304721fddb95654901b32195c9c7avboxsync * and can be quickly stepped across small or large gaps in the
45e9809aff7304721fddb95654901b32195c9c7avboxsync * sample grid
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Step across a small sample grid gap
45e9809aff7304721fddb95654901b32195c9c7avboxsync if (edge->e > 0) \
45e9809aff7304721fddb95654901b32195c9c7avboxsync * Step across a large sample grid gap
45e9809aff7304721fddb95654901b32195c9c7avboxsync if (edge->e > 0) \
45e9809aff7304721fddb95654901b32195c9c7avboxsync#endif /* _RENDEREDGE_H_ */