1/**************************************************************************/
2/* openxr_opengl_extension.h */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#ifndef OPENXR_OPENGL_EXTENSION_H
32#define OPENXR_OPENGL_EXTENSION_H
33
34#ifdef GLES3_ENABLED
35
36#include "../openxr_api.h"
37#include "../util.h"
38#include "openxr_extension_wrapper.h"
39
40#include "core/templates/vector.h"
41
42#ifdef ANDROID_ENABLED
43#define XR_USE_GRAPHICS_API_OPENGL_ES
44#include <EGL/egl.h>
45#include <EGL/eglext.h>
46#include <GLES3/gl3.h>
47#include <GLES3/gl3ext.h>
48#else
49#define XR_USE_GRAPHICS_API_OPENGL
50#endif
51
52#ifdef WINDOWS_ENABLED
53// Including windows.h here is absolutely evil, we shouldn't be doing this outside of platform
54// however due to the way the openxr headers are put together, we have no choice.
55#include <windows.h>
56#endif
57
58#ifdef X11_ENABLED
59#include OPENGL_INCLUDE_H
60#define GL_GLEXT_PROTOTYPES 1
61#define GL3_PROTOTYPES 1
62#include "thirdparty/glad/glad/gl.h"
63#include "thirdparty/glad/glad/glx.h"
64
65#include <X11/Xlib.h>
66#endif
67
68#ifdef ANDROID_ENABLED
69// The jobject type from jni.h is used by openxr_platform.h on Android.
70#include <jni.h>
71#endif
72
73// Include platform dependent structs.
74#include <openxr/openxr_platform.h>
75
76class OpenXROpenGLExtension : public OpenXRGraphicsExtensionWrapper {
77public:
78 virtual HashMap<String, bool *> get_requested_extensions() override;
79
80 virtual void on_instance_created(const XrInstance p_instance) override;
81 virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override;
82
83 virtual void on_pre_draw_viewport(RID p_render_target) override;
84 virtual void on_post_draw_viewport(RID p_render_target) override;
85
86 virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override;
87 virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override;
88 virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override;
89 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;
90 virtual void cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) override;
91 virtual bool create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) override;
92 virtual RID get_texture(void *p_swapchain_graphics_data, int p_image_index) override;
93
94private:
95 static OpenXROpenGLExtension *singleton;
96
97#ifdef WIN32
98 static XrGraphicsBindingOpenGLWin32KHR graphics_binding_gl;
99#elif ANDROID_ENABLED
100 static XrGraphicsBindingOpenGLESAndroidKHR graphics_binding_gl;
101#else
102 static XrGraphicsBindingOpenGLXlibKHR graphics_binding_gl;
103#endif
104
105 struct SwapchainGraphicsData {
106 bool is_multiview;
107 Vector<RID> texture_rids;
108 };
109
110 bool srgb_ext_is_available = true;
111 bool hw_linear_to_srgb_is_enabled = false;
112
113 bool check_graphics_api_support(XrVersion p_desired_version);
114
115#ifdef ANDROID_ENABLED
116 EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLESGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLESKHR *), p_graphics_requirements)
117#else
118 EXT_PROTO_XRRESULT_FUNC3(xrGetOpenGLGraphicsRequirementsKHR, (XrInstance), p_instance, (XrSystemId), p_system_id, (XrGraphicsRequirementsOpenGLKHR *), p_graphics_requirements)
119#endif
120 EXT_PROTO_XRRESULT_FUNC4(xrEnumerateSwapchainImages, (XrSwapchain), p_swapchain, (uint32_t), p_image_capacity_input, (uint32_t *), p_image_count_output, (XrSwapchainImageBaseHeader *), p_images)
121};
122
123#endif // GLES3_ENABLED
124
125#endif // OPENXR_OPENGL_EXTENSION_H
126