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Add support for OpenGL to OpenXR
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David Snopek
120
modules/openxr/extensions/openxr_opengl_extension.h
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120
modules/openxr/extensions/openxr_opengl_extension.h
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/*************************************************************************/
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/* openxr_opengl_extension.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef OPENXR_OPENGL_EXTENSION_H
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#define OPENXR_OPENGL_EXTENSION_H
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#ifdef GLES3_ENABLED
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#include "core/templates/vector.h"
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#include "openxr_extension_wrapper.h"
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#include "../openxr_api.h"
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#include "../util.h"
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#ifdef ANDROID_ENABLED
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#define XR_USE_GRAPHICS_API_OPENGL_ES
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include <GLES3/gl3.h>
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#include <GLES3/gl3ext.h>
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#else
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#define XR_USE_GRAPHICS_API_OPENGL
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#endif
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#ifdef WINDOWS_ENABLED
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// Including windows.h here is absolutely evil, we shouldn't be doing this outside of platform
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// however due to the way the openxr headers are put together, we have no choice.
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#include <windows.h>
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#endif
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#ifdef X11_ENABLED
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#include OPENGL_INCLUDE_H
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#define GL_GLEXT_PROTOTYPES 1
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#define GL3_PROTOTYPES 1
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#include <GL/gl.h>
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#include <GL/glext.h>
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#include <GL/glx.h>
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#include <X11/Xlib.h>
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#endif
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#ifdef ANDROID_ENABLED
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// The jobject type from jni.h is used by openxr_platform.h on Android.
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#include <jni.h>
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#endif
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// include platform dependent structs
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#include <openxr/openxr_platform.h>
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class OpenXROpenGLExtension : public OpenXRGraphicsExtensionWrapper {
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public:
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OpenXROpenGLExtension(OpenXRAPI *p_openxr_api);
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virtual ~OpenXROpenGLExtension() override;
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virtual void on_instance_created(const XrInstance p_instance) override;
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virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
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virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
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virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
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virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
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virtual bool get_swapchain_image_data(XrSwapchain p_swapchain, int64_t p_swapchain_format, uint32_t p_width, uint32_t p_height, uint32_t p_sample_count, uint32_t p_array_size, void **r_swapchain_graphics_data) override;
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virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
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virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
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virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
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private:
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static OpenXROpenGLExtension *singleton;
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#ifdef WIN32
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static XrGraphicsBindingOpenGLWin32KHR graphics_binding_gl;
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#elif ANDROID_ENABLED
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static XrGraphicsBindingOpenGLESAndroidKHR graphics_binding_gl;
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#else
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static XrGraphicsBindingOpenGLXlibKHR graphics_binding_gl;
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#endif
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struct SwapchainGraphicsData {
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bool is_multiview;
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Vector<RID> texture_rids;
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};
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bool check_graphics_api_support(XrVersion p_desired_version);
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#ifdef ANDROID_ENABLED
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EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLESGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLESKHR *), p_graphics_requirements)
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#else
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EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLKHR *), p_graphics_requirements)
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#endif
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EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
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};
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#endif // GLES3_ENABLED
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#endif // OPENXR_OPENGL_EXTENSION_H
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