1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
/** \file
* \ingroup GHOST
*/
#include <cassert>
#include "GHOST_C-api.h"
#include "GHOST_IXrGraphicsBinding.h"
#include "GHOST_XrException.h"
#include "GHOST_XrSession.h"
#include "GHOST_Xr_intern.h"
#include "GHOST_XrSwapchain.h"
struct OpenXRSwapchainData {
using ImageVec = std::vector<XrSwapchainImageBaseHeader *>;
XrSwapchain swapchain = XR_NULL_HANDLE;
ImageVec swapchain_images;
};
static OpenXRSwapchainData::ImageVec swapchain_images_create(XrSwapchain swapchain,
GHOST_IXrGraphicsBinding &gpu_binding)
{
std::vector<XrSwapchainImageBaseHeader *> images;
uint32_t image_count;
CHECK_XR(xrEnumerateSwapchainImages(swapchain, 0, &image_count, nullptr),
"Failed to get count of swapchain images to create for the VR session.");
images = gpu_binding.createSwapchainImages(image_count);
CHECK_XR(xrEnumerateSwapchainImages(swapchain, images.size(), &image_count, images[0]),
"Failed to create swapchain images for the VR session.");
return images;
}
GHOST_XrSwapchain::GHOST_XrSwapchain(GHOST_IXrGraphicsBinding &gpu_binding,
const XrSession &session,
const XrViewConfigurationView &view_config)
: m_oxr(std::make_unique<OpenXRSwapchainData>())
{
XrSwapchainCreateInfo create_info = {XR_TYPE_SWAPCHAIN_CREATE_INFO};
uint32_t format_count = 0;
CHECK_XR(xrEnumerateSwapchainFormats(session, 0, &format_count, nullptr),
"Failed to get count of swapchain image formats.");
std::vector<int64_t> swapchain_formats(format_count);
CHECK_XR(xrEnumerateSwapchainFormats(
session, swapchain_formats.size(), &format_count, swapchain_formats.data()),
"Failed to get swapchain image formats.");
assert(swapchain_formats.size() == format_count);
std::optional chosen_format = gpu_binding.chooseSwapchainFormat(
swapchain_formats, m_format, m_is_srgb_buffer);
if (!chosen_format) {
throw GHOST_XrException(
"Error: No format matching OpenXR runtime supported swapchain formats found.");
}
create_info.usageFlags = XR_SWAPCHAIN_USAGE_SAMPLED_BIT |
XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT;
create_info.format = *chosen_format;
create_info.sampleCount = view_config.recommendedSwapchainSampleCount;
create_info.width = view_config.recommendedImageRectWidth;
create_info.height = view_config.recommendedImageRectHeight;
create_info.faceCount = 1;
create_info.arraySize = 1;
create_info.mipCount = 1;
CHECK_XR(xrCreateSwapchain(session, &create_info, &m_oxr->swapchain),
"Failed to create OpenXR swapchain.");
m_image_width = create_info.width;
m_image_height = create_info.height;
m_oxr->swapchain_images = swapchain_images_create(m_oxr->swapchain, gpu_binding);
}
GHOST_XrSwapchain::GHOST_XrSwapchain(GHOST_XrSwapchain &&other)
: m_oxr(std::move(other.m_oxr)),
m_image_width(other.m_image_width),
m_image_height(other.m_image_height),
m_format(other.m_format),
m_is_srgb_buffer(other.m_is_srgb_buffer)
{
/* Prevent xrDestroySwapchain call for the moved out item. */
other.m_oxr = nullptr;
}
GHOST_XrSwapchain::~GHOST_XrSwapchain()
{
/* m_oxr may be NULL after move. */
if (m_oxr && m_oxr->swapchain != XR_NULL_HANDLE) {
CHECK_XR_ASSERT(xrDestroySwapchain(m_oxr->swapchain));
}
}
XrSwapchainImageBaseHeader *GHOST_XrSwapchain::acquireDrawableSwapchainImage()
{
XrSwapchainImageAcquireInfo acquire_info = {XR_TYPE_SWAPCHAIN_IMAGE_ACQUIRE_INFO};
XrSwapchainImageWaitInfo wait_info = {XR_TYPE_SWAPCHAIN_IMAGE_WAIT_INFO};
uint32_t image_idx;
CHECK_XR(xrAcquireSwapchainImage(m_oxr->swapchain, &acquire_info, &image_idx),
"Failed to acquire swapchain image for the VR session.");
wait_info.timeout = XR_INFINITE_DURATION;
CHECK_XR(xrWaitSwapchainImage(m_oxr->swapchain, &wait_info),
"Failed to acquire swapchain image for the VR session.");
return m_oxr->swapchain_images[image_idx];
}
void GHOST_XrSwapchain::updateCompositionLayerProjectViewSubImage(XrSwapchainSubImage &r_sub_image)
{
r_sub_image.swapchain = m_oxr->swapchain;
r_sub_image.imageRect.offset = {0, 0};
r_sub_image.imageRect.extent = {m_image_width, m_image_height};
}
GHOST_TXrSwapchainFormat GHOST_XrSwapchain::getFormat() const
{
return m_format;
}
bool GHOST_XrSwapchain::isBufferSRGB() const
{
return m_is_srgb_buffer;
}
void GHOST_XrSwapchain::releaseImage()
{
XrSwapchainImageReleaseInfo release_info = {XR_TYPE_SWAPCHAIN_IMAGE_RELEASE_INFO};
CHECK_XR(xrReleaseSwapchainImage(m_oxr->swapchain, &release_info),
"Failed to release swapchain image used to submit VR session frame.");
}
|
