zbuf.h

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/* SPDX-FileCopyrightText: 2023 Blender Authors
 *
 * SPDX-License-Identifier: GPL-2.0-or-later */

 
#pragma once

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;
};

void zbuf_alloc_span(struct ZSpan *zspan, int rectx, int recty);
void zbuf_free_span(struct ZSpan *zspan);

void zspan_scanconvert(struct ZSpan *zspan,
                       void *handle,
                       float *v1,
                       float *v2,
                       float *v3,
                       void (*func)(void *, int, int, float, float));