USD/pxr/imaging/hgiInterop/hgiInterop.cpp at bb98ff89aeb79f2186054060422a3f9b50cb6912 · dgovil/USD · GitHub

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
//
// Copyright 2020 Pixar
//
// Licensed under the terms set forth in the LICENSE.txt file available at
// https://openusd.org/license.
//
#include "pxr/imaging/hgiInterop/hgiInterop.h"
#include "pxr/imaging/hgi/hgi.h"
#include "pxr/imaging/hgi/tokens.h"

#if defined(PXR_GL_SUPPORT_ENABLED)
#include "pxr/imaging/hgiInterop/opengl.h"
#endif

#if defined(PXR_VULKAN_SUPPORT_ENABLED)
#include "pxr/imaging/hgiInterop/vulkan.h"
#endif

#if defined(PXR_METAL_SUPPORT_ENABLED)
#include "pxr/imaging/hgiMetal/hgi.h"
#if defined(ARCH_OS_OSX)
#include "pxr/imaging/hgiInterop/metal.h"
#endif
#endif

PXR_NAMESPACE_OPEN_SCOPE

struct HgiInteropImpl
{
#if defined(PXR_GL_SUPPORT_ENABLED)
    std::unique_ptr<HgiInteropOpenGL> _openGLToOpenGL;
#endif
#if defined(PXR_VULKAN_SUPPORT_ENABLED)
    std::unique_ptr<HgiInteropVulkan> _vulkanToOpenGL;
#endif
#if defined(PXR_METAL_SUPPORT_ENABLED)
#if !defined(ARCH_OS_IPHONE)
    std::unique_ptr<HgiInteropMetal> _metalToOpenGL;
#endif
#endif
};

HgiInterop::HgiInterop()
 : _hgiInteropImpl(std::make_unique<HgiInteropImpl>())
{}

HgiInterop::~HgiInterop() = default;

void HgiInterop::TransferToApp(
    Hgi *srcHgi,
    HgiTextureHandle const &srcColor,
    HgiTextureHandle const &srcDepth,
    TfToken const &dstApi,
    VtValue const &dstFramebuffer,
    GfVec4i const &dstRegion)
{
    TfToken const& srcApi = srcHgi->GetAPIName();

    if (dstApi != HgiTokens->OpenGL) {
        TF_CODING_ERROR("Unsupported destination Hgi backend: %s",
                        dstApi.GetText());
        return;
    }

#if defined(PXR_GL_SUPPORT_ENABLED) && !defined(ARCH_OS_IPHONE)
    if (srcApi == HgiTokens->OpenGL) {
        // Transfer OpenGL textures to OpenGL application
        if (!_hgiInteropImpl->_openGLToOpenGL) {
            _hgiInteropImpl->_openGLToOpenGL =
                std::make_unique<HgiInteropOpenGL>();
        }
        return _hgiInteropImpl->_openGLToOpenGL->CompositeToInterop(
            srcColor, srcDepth, dstFramebuffer, dstRegion);
    }
#endif

#if defined(PXR_VULKAN_SUPPORT_ENABLED)
    if (srcApi == HgiTokens->Vulkan) {
        // Transfer Vulkan textures to OpenGL application
        // XXX: It's possible that if we use the same HgiInterop with a
        // different Hgi instance passed to this function, HgiInteropVulkan
        // will have the wrong Hgi instance since we wouldn't recreate it here.
        // We should fix this.
        if (!_hgiInteropImpl->_vulkanToOpenGL) {
            _hgiInteropImpl->_vulkanToOpenGL =
                std::make_unique<HgiInteropVulkan>(srcHgi);
        }
        return _hgiInteropImpl->_vulkanToOpenGL->CompositeToInterop(
            srcColor, srcDepth, dstFramebuffer, dstRegion);
    }
#endif

#if defined(PXR_METAL_SUPPORT_ENABLED) && !defined(ARCH_OS_IPHONE)
    if (srcApi == HgiTokens->Metal) {
        // Transfer Metal textures to OpenGL application
        // XXX: It's possible that if we use the same HgiInterop with a
        // different Hgi instance passed to this function, HgiInteropMetal
        // will have the wrong Hgi instance since we wouldn't recreate it here.
        // We should fix this.
        if (!_hgiInteropImpl->_metalToOpenGL) {
            _hgiInteropImpl->_metalToOpenGL =
                std::make_unique<HgiInteropMetal>(srcHgi);
        }
        return _hgiInteropImpl->_metalToOpenGL->CompositeToInterop(
            srcColor, srcDepth, dstFramebuffer, dstRegion);
    }
#endif

    TF_CODING_ERROR("Unsupported source Hgi backend: %s", srcApi.GetText());
}

PXR_NAMESPACE_CLOSE_SCOPE