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

/** \file
 * \ingroup gpu
 */

#pragma once

#include "BLI_compiler_attrs.h"
#include "BLI_sys_types.h"

struct rctf;
namespace blender::gpu {
class Batch;
}

/* `gpu_batch_utils.cc` */

/**
 * Creates triangles from a byte-array of polygons.
 *
 * See 'make_shape_2d_from_blend.py' utility to create data to pass to this function.
 *
 * \param polys_flat: Pairs of X, Y coordinates (repeating to signify closing the polygon).
 * \param polys_flat_len: Length of the array (must be an even number).
 * \param rect: Optional region to map the byte 0..255 coords to. When not set use -1..1.
 */
blender::gpu::Batch *GPU_batch_tris_from_poly_2d_encoded(const uchar *polys_flat,
                                                         uint polys_flat_len,
                                                         const rctf *rect) ATTR_WARN_UNUSED_RESULT
    ATTR_NONNULL(1);
blender::gpu::Batch *GPU_batch_wire_from_poly_2d_encoded(const uchar *polys_flat,
                                                         uint polys_flat_len,
                                                         const rctf *rect) ATTR_WARN_UNUSED_RESULT
    ATTR_NONNULL(1);

/**
 * Create a batch of a unit cube (-1..+1).
 * Only has position attribute.
 */
blender::gpu::Batch *GPU_batch_unit_cube() ATTR_WARN_UNUSED_RESULT;

/**
 * Replacement for #gluSphere.
 *
 * \note Only use by draw manager. Use the presets function instead for interface.
 */
blender::gpu::Batch *gpu_batch_sphere(int lat_res, int lon_res) ATTR_WARN_UNUSED_RESULT;