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xrt: Add visibility mask interface

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Jakob Bornecrantz 2023-11-08 22:25:00 +00:00 committed by Simon Zeni
parent a77e35fdaf
commit 69afb62742
3 changed files with 89 additions and 0 deletions
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12
src/xrt/include/xrt/xrt_defines.h
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@ -1293,6 +1293,18 @@ enum xrt_form_factor
XRT_FORM_FACTOR_HANDHELD, //!< Handheld display.
};
/*!
* Visibility mask, mirror of XrVisibilityMaskKHR
*
* @ingroup xrt_iface
*/
enum xrt_visibility_mask_type
{
XRT_VISIBILITY_MASK_TYPE_HIDDEN_TRIANGLE_MESH = 1,
XRT_VISIBILITY_MASK_TYPE_VISIBLE_TRIANGLE_MESH = 2,
XRT_VISIBILITY_MASK_TYPE_LINE_LOOP = 3,
};
#ifdef __cplusplus
}
#endif

8
src/xrt/include/xrt/xrt_device.h
View file

@ -11,6 +11,7 @@
#pragma once
#include "xrt/xrt_defines.h"
#include "xrt/xrt_visibility_mask.h"
#ifdef __cplusplus
@ -396,6 +397,13 @@ struct xrt_device
bool (*compute_distortion)(
struct xrt_device *xdev, uint32_t view, float u, float v, struct xrt_uv_triplet *out_result);
/*!
* Get the visibility mask for this device.
*/
void (*get_visibility_mask)(struct xrt_device *xdev,
enum xrt_visibility_mask_type type,
struct xrt_visibility_mask **out_mask);
/*!
* Destroy device.
*/

69
src/xrt/include/xrt/xrt_visibility_mask.h Normal file
View file

@ -0,0 +1,69 @@
// Copyright 2023, Collabora, Ltd.
// SPDX-License-Identifier: BSL-1.0
/*!
* @file
* @brief Header defining visibility mask helper struct.
* @author Jakob Bornecrantz <jakob@collabora.com>
* @ingroup xrt_iface
*/
#pragma once
#include "xrt/xrt_defines.h"
#ifdef __cplusplus
extern "C" {
#endif
/*!
* Visibility mask helper, the indices and vertices are tightly packed after
* this struct.
*
* @ingroup xrt_iface
*/
struct xrt_visibility_mask
{
enum xrt_visibility_mask_type type;
uint32_t index_count;
uint32_t vertex_count;
};
/*!
* Visibility mask helper function to get the indices.
*
* @ingroup xrt_iface
*/
static inline uint32_t *
xrt_visibility_mask_get_indices(const struct xrt_visibility_mask *mask)
{
return (uint32_t *)&mask[1];
}
/*!
* Visibility mask helper function to get the vertices.
*
* @ingroup xrt_iface
*/
static inline struct xrt_vec2 *
xrt_visibility_mask_get_vertices(const struct xrt_visibility_mask *mask)
{
const uint32_t *indices = xrt_visibility_mask_get_indices(mask);
return (struct xrt_vec2 *)&indices[mask->index_count];
}
/*!
* Visibility mask helper function to get the total size of the struct.
*
* @ingroup xrt_iface
*/
static inline size_t
xrt_visibility_mask_get_size(const struct xrt_visibility_mask *mask)
{
return sizeof(*mask) + //
sizeof(uint32_t) * mask->index_count + //
sizeof(struct xrt_vec2) * mask->vertex_count; //
}
#ifdef __cplusplus
}
#endif