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/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup render
*/
#pragma once
#ifdef __cplusplus
extern "C" {
#endif
/** Span fill in method, is also used to localize data for Z-buffering. */
typedef struct ZSpan {
int rectx, recty; /* range for clipping */
int miny1, maxy1, miny2, maxy2; /* actual filled in range */
const float *minp1, *maxp1, *minp2, *maxp2; /* vertex pointers detect min/max range in */
float *span1, *span2;
} ZSpan;
/**
* Each Z-buffer has coordinates transformed to local rect coordinates, so we can simply clip.
*/
void zbuf_alloc_span(struct ZSpan *zspan, int rectx, int recty);
void zbuf_free_span(struct ZSpan *zspan);
/**
* Scan-convert for strand triangles, calls function for each x, y coordinate
* and gives UV barycentrics and z.
*/
void zspan_scanconvert(struct ZSpan *zspan,
void *handle,
float *v1,
float *v2,
float *v3,
void (*func)(void *, int, int, float, float));
#ifdef __cplusplus
}
#endif
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