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Implement OpenXR Foveated rendering support
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modules/openxr/extensions/openxr_fb_foveation_extension.cpp
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| /**************************************************************************/ | ||
| /* openxr_fb_foveation_extension.cpp */ | ||
| /**************************************************************************/ | ||
| /* This file is part of: */ | ||
| /* GODOT ENGINE */ | ||
| /* https://godotengine.org */ | ||
| /**************************************************************************/ | ||
| /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ | ||
| /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ | ||
| /* */ | ||
| /* Permission is hereby granted, free of charge, to any person obtaining */ | ||
| /* a copy of this software and associated documentation files (the */ | ||
| /* "Software"), to deal in the Software without restriction, including */ | ||
| /* without limitation the rights to use, copy, modify, merge, publish, */ | ||
| /* distribute, sublicense, and/or sell copies of the Software, and to */ | ||
| /* permit persons to whom the Software is furnished to do so, subject to */ | ||
| /* the following conditions: */ | ||
| /* */ | ||
| /* The above copyright notice and this permission notice shall be */ | ||
| /* included in all copies or substantial portions of the Software. */ | ||
| /* */ | ||
| /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ | ||
| /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ | ||
| /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ | ||
| /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ | ||
| /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ | ||
| /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ | ||
| /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ | ||
| /**************************************************************************/ | ||
|
|
||
| #include "openxr_fb_foveation_extension.h" | ||
| #include "core/config/project_settings.h" | ||
|
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| OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::singleton = nullptr; | ||
|
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| OpenXRFBFoveationExtension *OpenXRFBFoveationExtension::get_singleton() { | ||
| return singleton; | ||
| } | ||
|
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| OpenXRFBFoveationExtension::OpenXRFBFoveationExtension(const String &p_rendering_driver) { | ||
| singleton = this; | ||
| rendering_driver = p_rendering_driver; | ||
| swapchain_update_state_ext = OpenXRFBUpdateSwapchainExtension::get_singleton(); | ||
| int fov_level = GLOBAL_GET("xr/openxr/foveation_level"); | ||
| if (fov_level >= 0 && fov_level < 4) { | ||
| foveation_level = XrFoveationLevelFB(fov_level); | ||
| } | ||
| bool fov_dyn = GLOBAL_GET("xr/openxr/foveation_dynamic"); | ||
| foveation_dynamic = fov_dyn ? XR_FOVEATION_DYNAMIC_LEVEL_ENABLED_FB : XR_FOVEATION_DYNAMIC_DISABLED_FB; | ||
|
|
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| swapchain_create_info_foveation_fb.type = XR_TYPE_SWAPCHAIN_CREATE_INFO_FOVEATION_FB; | ||
| swapchain_create_info_foveation_fb.next = nullptr; | ||
| swapchain_create_info_foveation_fb.flags = 0; | ||
| } | ||
|
|
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| OpenXRFBFoveationExtension::~OpenXRFBFoveationExtension() { | ||
| singleton = nullptr; | ||
| swapchain_update_state_ext = nullptr; | ||
| } | ||
|
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| HashMap<String, bool *> OpenXRFBFoveationExtension::get_requested_extensions() { | ||
| HashMap<String, bool *> request_extensions; | ||
|
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| if (rendering_driver == "vulkan") { | ||
| // This is currently only supported on OpenGL, but we may add Vulkan support in the future... | ||
|
|
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| } else if (rendering_driver == "opengl3") { | ||
| request_extensions[XR_FB_FOVEATION_EXTENSION_NAME] = &fb_foveation_ext; | ||
| request_extensions[XR_FB_FOVEATION_CONFIGURATION_EXTENSION_NAME] = &fb_foveation_configuration_ext; | ||
| } | ||
|
|
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| return request_extensions; | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::on_instance_created(const XrInstance p_instance) { | ||
| if (fb_foveation_ext) { | ||
| EXT_INIT_XR_FUNC(xrCreateFoveationProfileFB); | ||
| EXT_INIT_XR_FUNC(xrDestroyFoveationProfileFB); | ||
| } | ||
|
|
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| if (fb_foveation_configuration_ext) { | ||
| // nothing to register here... | ||
| } | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::on_instance_destroyed() { | ||
| fb_foveation_ext = false; | ||
| fb_foveation_configuration_ext = false; | ||
| } | ||
|
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| bool OpenXRFBFoveationExtension::is_enabled() const { | ||
| return swapchain_update_state_ext != nullptr && swapchain_update_state_ext->is_enabled() && fb_foveation_ext && fb_foveation_configuration_ext; | ||
| } | ||
|
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| void *OpenXRFBFoveationExtension::set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) { | ||
| if (is_enabled()) { | ||
| swapchain_create_info_foveation_fb.next = p_next_pointer; | ||
| return &swapchain_create_info_foveation_fb; | ||
| } else { | ||
| return p_next_pointer; | ||
| } | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::on_state_ready() { | ||
| update_profile(); | ||
| } | ||
|
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| XrFoveationLevelFB OpenXRFBFoveationExtension::get_foveation_level() const { | ||
| return foveation_level; | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::set_foveation_level(XrFoveationLevelFB p_foveation_level) { | ||
| foveation_level = p_foveation_level; | ||
|
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| // Update profile will do nothing if we're not yet initialised | ||
| update_profile(); | ||
| } | ||
|
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| XrFoveationDynamicFB OpenXRFBFoveationExtension::get_foveation_dynamic() const { | ||
| return foveation_dynamic; | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::set_foveation_dynamic(XrFoveationDynamicFB p_foveation_dynamic) { | ||
| foveation_dynamic = p_foveation_dynamic; | ||
|
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| // Update profile will do nothing if we're not yet initialised | ||
| update_profile(); | ||
| } | ||
|
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| void OpenXRFBFoveationExtension::update_profile() { | ||
| if (!is_enabled()) { | ||
| return; | ||
| } | ||
|
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| XrFoveationLevelProfileCreateInfoFB level_profile_create_info; | ||
| level_profile_create_info.type = XR_TYPE_FOVEATION_LEVEL_PROFILE_CREATE_INFO_FB; | ||
| level_profile_create_info.next = nullptr; | ||
| level_profile_create_info.level = foveation_level; | ||
| level_profile_create_info.verticalOffset = 0.0f; | ||
| level_profile_create_info.dynamic = foveation_dynamic; | ||
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| XrFoveationProfileCreateInfoFB profile_create_info; | ||
| profile_create_info.type = XR_TYPE_FOVEATION_PROFILE_CREATE_INFO_FB; | ||
| profile_create_info.next = &level_profile_create_info; | ||
|
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| XrFoveationProfileFB foveation_profile; | ||
| XrResult result = xrCreateFoveationProfileFB(OpenXRAPI::get_singleton()->get_session(), &profile_create_info, &foveation_profile); | ||
| if (XR_FAILED(result)) { | ||
| print_line("OpenXR: Unable to create the foveation profile [", OpenXRAPI::get_singleton()->get_error_string(result), "]"); | ||
| return; | ||
| } | ||
|
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| XrSwapchainStateFoveationFB foveation_update_state; | ||
| foveation_update_state.type = XR_TYPE_SWAPCHAIN_STATE_FOVEATION_FB; | ||
| foveation_update_state.profile = foveation_profile; | ||
|
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| result = swapchain_update_state_ext->xrUpdateSwapchainFB(OpenXRAPI::get_singleton()->get_color_swapchain(), (XrSwapchainStateBaseHeaderFB *)&foveation_update_state); | ||
| if (XR_FAILED(result)) { | ||
| print_line("OpenXR: Unable to update the swapchain [", OpenXRAPI::get_singleton()->get_error_string(result), "]"); | ||
|
|
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| // We still want to destroy our profile so keep going... | ||
| } | ||
|
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| result = xrDestroyFoveationProfileFB(foveation_profile); | ||
| if (XR_FAILED(result)) { | ||
| print_line("OpenXR: Unable to destroy the foveation profile [", OpenXRAPI::get_singleton()->get_error_string(result), "]"); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,96 @@ | ||
| /**************************************************************************/ | ||
| /* openxr_fb_foveation_extension.h */ | ||
| /**************************************************************************/ | ||
| /* This file is part of: */ | ||
| /* GODOT ENGINE */ | ||
| /* https://godotengine.org */ | ||
| /**************************************************************************/ | ||
| /* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */ | ||
| /* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */ | ||
| /* */ | ||
| /* Permission is hereby granted, free of charge, to any person obtaining */ | ||
| /* a copy of this software and associated documentation files (the */ | ||
| /* "Software"), to deal in the Software without restriction, including */ | ||
| /* without limitation the rights to use, copy, modify, merge, publish, */ | ||
| /* distribute, sublicense, and/or sell copies of the Software, and to */ | ||
| /* permit persons to whom the Software is furnished to do so, subject to */ | ||
| /* the following conditions: */ | ||
| /* */ | ||
| /* The above copyright notice and this permission notice shall be */ | ||
| /* included in all copies or substantial portions of the Software. */ | ||
| /* */ | ||
| /* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */ | ||
| /* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */ | ||
| /* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */ | ||
| /* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */ | ||
| /* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */ | ||
| /* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */ | ||
| /* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ | ||
| /**************************************************************************/ | ||
|
|
||
| #ifndef OPENXR_FB_FOVEATION_EXTENSION_H | ||
| #define OPENXR_FB_FOVEATION_EXTENSION_H | ||
|
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| // This extension implements the FB Foveation extension. | ||
| // This is an extension Meta added due to VRS being unavailable on Android. | ||
| // Other Android based devices are implementing this as well, see: | ||
| // https://github.khronos.org/OpenXR-Inventory/extension_support.html#XR_FB_foveation | ||
|
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| // Note: Currently we only support this for OpenGL. | ||
| // This extension works on enabling foveated rendering on the swapchain. | ||
| // Vulkan does not render 3D content directly to the swapchain image | ||
| // hence this extension can't be used. | ||
|
|
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| #include "../openxr_api.h" | ||
| #include "../util.h" | ||
| #include "openxr_extension_wrapper.h" | ||
| #include "openxr_fb_update_swapchain_extension.h" | ||
|
|
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| class OpenXRFBFoveationExtension : public OpenXRExtensionWrapper { | ||
| public: | ||
| static OpenXRFBFoveationExtension *get_singleton(); | ||
|
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| OpenXRFBFoveationExtension(const String &p_rendering_driver); | ||
| virtual ~OpenXRFBFoveationExtension() override; | ||
|
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| virtual HashMap<String, bool *> get_requested_extensions() override; | ||
|
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| virtual void on_instance_created(const XrInstance p_instance) override; | ||
| virtual void on_instance_destroyed() override; | ||
|
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| virtual void *set_swapchain_create_info_and_get_next_pointer(void *p_next_pointer) override; | ||
|
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| virtual void on_state_ready() override; | ||
|
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| bool is_enabled() const; | ||
|
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| XrFoveationLevelFB get_foveation_level() const; | ||
| void set_foveation_level(XrFoveationLevelFB p_foveation_level); | ||
|
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| XrFoveationDynamicFB get_foveation_dynamic() const; | ||
| void set_foveation_dynamic(XrFoveationDynamicFB p_foveation_dynamic); | ||
|
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| private: | ||
| static OpenXRFBFoveationExtension *singleton; | ||
|
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| // Setup | ||
| String rendering_driver; | ||
| bool fb_foveation_ext = false; | ||
| bool fb_foveation_configuration_ext = false; | ||
|
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| // Configuration | ||
| XrFoveationLevelFB foveation_level = XR_FOVEATION_LEVEL_NONE_FB; | ||
| XrFoveationDynamicFB foveation_dynamic = XR_FOVEATION_DYNAMIC_DISABLED_FB; | ||
|
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| void update_profile(); | ||
|
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| // Enable foveation on this swapchain | ||
| XrSwapchainCreateInfoFoveationFB swapchain_create_info_foveation_fb; | ||
| OpenXRFBUpdateSwapchainExtension *swapchain_update_state_ext = nullptr; | ||
|
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| // OpenXR API call wrappers | ||
| EXT_PROTO_XRRESULT_FUNC3(xrCreateFoveationProfileFB, (XrSession), session, (const XrFoveationProfileCreateInfoFB *), create_info, (XrFoveationProfileFB *), profile); | ||
| EXT_PROTO_XRRESULT_FUNC1(xrDestroyFoveationProfileFB, (XrFoveationProfileFB), profile); | ||
| }; | ||
|
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||
| #endif // OPENXR_FB_FOVEATION_EXTENSION_H |
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