/**************************************************************************/ /* openxr_opengl_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. */ /**************************************************************************/ #ifdef GLES3_ENABLED #include "../extensions/openxr_opengl_extension.h" #include "../openxr_util.h" #include "drivers/gles3/effects/copy_effects.h" #include "drivers/gles3/storage/texture_storage.h" #include "servers/rendering/rendering_server_globals.h" #include "servers/rendering_server.h" // OpenXR requires us to submit sRGB textures so that it recognises the content // as being in sRGB color space. We do fall back on "normal" textures but this // will likely result in incorrect colors as OpenXR will double the sRGB conversion. // All major XR runtimes support sRGB textures. // In OpenGL output of the fragment shader is assumed to be in the color space of // the developers choice, however a linear to sRGB HW conversion can be enabled // through enabling GL_FRAMEBUFFER_SRGB if an sRGB color attachment is used. // This is a global setting. // See: https://www.khronos.org/opengl/wiki/Framebuffer // In OpenGLES output of the fragment shader is assumed to be in linear color space // and will be converted by default to sRGB if an sRGB color attachment is used. // The extension GL_EXT_sRGB_write_control was introduced to enable turning this // feature off. // See: https://registry.khronos.org/OpenGL/extensions/EXT/EXT_sRGB_write_control.txt // On OpenGLES this is not defined in our standard headers.. #ifndef GL_FRAMEBUFFER_SRGB #define GL_FRAMEBUFFER_SRGB 0x8DB9 #endif HashMap OpenXROpenGLExtension::get_requested_extensions() { HashMap request_extensions; #ifdef ANDROID_ENABLED request_extensions[XR_KHR_OPENGL_ES_ENABLE_EXTENSION_NAME] = nullptr; #else request_extensions[XR_KHR_OPENGL_ENABLE_EXTENSION_NAME] = nullptr; #endif return request_extensions; } void OpenXROpenGLExtension::on_instance_created(const XrInstance p_instance) { // Obtain pointers to functions we're accessing here. ERR_FAIL_NULL(OpenXRAPI::get_singleton()); #ifdef ANDROID_ENABLED EXT_INIT_XR_FUNC(xrGetOpenGLESGraphicsRequirementsKHR); #else EXT_INIT_XR_FUNC(xrGetOpenGLGraphicsRequirementsKHR); #endif EXT_INIT_XR_FUNC(xrEnumerateSwapchainImages); } bool OpenXROpenGLExtension::check_graphics_api_support(XrVersion p_desired_version) { ERR_FAIL_NULL_V(OpenXRAPI::get_singleton(), false); XrSystemId system_id = OpenXRAPI::get_singleton()->get_system_id(); XrInstance instance = OpenXRAPI::get_singleton()->get_instance(); #ifdef ANDROID_ENABLED XrGraphicsRequirementsOpenGLESKHR opengl_requirements; opengl_requirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_ES_KHR; opengl_requirements.next = nullptr; XrResult result = xrGetOpenGLESGraphicsRequirementsKHR(instance, system_id, &opengl_requirements); if (!OpenXRAPI::get_singleton()->xr_result(result, "Failed to get OpenGL graphics requirements!")) { return false; } #else XrGraphicsRequirementsOpenGLKHR opengl_requirements; opengl_requirements.type = XR_TYPE_GRAPHICS_REQUIREMENTS_OPENGL_KHR; opengl_requirements.next = nullptr; XrResult result = xrGetOpenGLGraphicsRequirementsKHR(instance, system_id, &opengl_requirements); if (!OpenXRAPI::get_singleton()->xr_result(result, "Failed to get OpenGL graphics requirements!")) { return false; } #endif if (p_desired_version < opengl_requirements.minApiVersionSupported) { print_line("OpenXR: Requested OpenGL version does not meet the minimum version this runtime supports."); print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version)); print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.minApiVersionSupported)); print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.maxApiVersionSupported)); return false; } if (p_desired_version > opengl_requirements.maxApiVersionSupported) { print_line("OpenXR: Requested OpenGL version exceeds the maximum version this runtime has been tested on and is known to support."); print_line("- desired_version ", OpenXRUtil::make_xr_version_string(p_desired_version)); print_line("- minApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.minApiVersionSupported)); print_line("- maxApiVersionSupported ", OpenXRUtil::make_xr_version_string(opengl_requirements.maxApiVersionSupported)); } return true; } #ifdef WIN32 XrGraphicsBindingOpenGLWin32KHR OpenXROpenGLExtension::graphics_binding_gl; #elif ANDROID_ENABLED XrGraphicsBindingOpenGLESAndroidKHR OpenXROpenGLExtension::graphics_binding_gl; #else XrGraphicsBindingOpenGLXlibKHR OpenXROpenGLExtension::graphics_binding_gl; #endif void *OpenXROpenGLExtension::set_session_create_and_get_next_pointer(void *p_next_pointer) { XrVersion desired_version = XR_MAKE_VERSION(3, 3, 0); if (!check_graphics_api_support(desired_version)) { print_line("OpenXR: Trying to initialize with OpenGL anyway..."); //return p_next_pointer; } DisplayServer *display_server = DisplayServer::get_singleton(); #ifdef WIN32 graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_WIN32_KHR, graphics_binding_gl.next = p_next_pointer; graphics_binding_gl.hDC = (HDC)display_server->window_get_native_handle(DisplayServer::WINDOW_VIEW); graphics_binding_gl.hGLRC = (HGLRC)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT); #elif ANDROID_ENABLED graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_ES_ANDROID_KHR; graphics_binding_gl.next = p_next_pointer; graphics_binding_gl.display = (void *)display_server->window_get_native_handle(DisplayServer::DISPLAY_HANDLE); graphics_binding_gl.config = (EGLConfig)0; // https://github.com/KhronosGroup/OpenXR-SDK-Source/blob/master/src/tests/hello_xr/graphicsplugin_opengles.cpp#L122 graphics_binding_gl.context = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT); #else graphics_binding_gl.type = XR_TYPE_GRAPHICS_BINDING_OPENGL_XLIB_KHR; graphics_binding_gl.next = p_next_pointer; void *display_handle = (void *)display_server->window_get_native_handle(DisplayServer::DISPLAY_HANDLE); void *glxcontext_handle = (void *)display_server->window_get_native_handle(DisplayServer::OPENGL_CONTEXT); void *glxdrawable_handle = (void *)display_server->window_get_native_handle(DisplayServer::WINDOW_HANDLE); graphics_binding_gl.xDisplay = (Display *)display_handle; graphics_binding_gl.glxContext = (GLXContext)glxcontext_handle; graphics_binding_gl.glxDrawable = (GLXDrawable)glxdrawable_handle; // spec says to use proper values but runtimes don't care graphics_binding_gl.visualid = 0; graphics_binding_gl.glxFBConfig = 0; #endif return &graphics_binding_gl; } void OpenXROpenGLExtension::get_usable_swapchain_formats(Vector &p_usable_swap_chains) { p_usable_swap_chains.push_back(GL_SRGB8_ALPHA8); p_usable_swap_chains.push_back(GL_RGBA8); } void OpenXROpenGLExtension::get_usable_depth_formats(Vector &p_usable_depth_formats) { p_usable_depth_formats.push_back(GL_DEPTH_COMPONENT32F); p_usable_depth_formats.push_back(GL_DEPTH24_STENCIL8); p_usable_depth_formats.push_back(GL_DEPTH32F_STENCIL8); p_usable_depth_formats.push_back(GL_DEPTH_COMPONENT24); } void OpenXROpenGLExtension::on_pre_draw_viewport(RID p_render_target) { if (srgb_ext_is_available) { hw_linear_to_srgb_is_enabled = glIsEnabled(GL_FRAMEBUFFER_SRGB); if (hw_linear_to_srgb_is_enabled) { // Disable this. glDisable(GL_FRAMEBUFFER_SRGB); } } } void OpenXROpenGLExtension::on_post_draw_viewport(RID p_render_target) { if (srgb_ext_is_available && hw_linear_to_srgb_is_enabled) { // Re-enable this. glEnable(GL_FRAMEBUFFER_SRGB); } } bool OpenXROpenGLExtension::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) { GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton(); ERR_FAIL_NULL_V(texture_storage, false); uint32_t swapchain_length; XrResult result = xrEnumerateSwapchainImages(p_swapchain, 0, &swapchain_length, nullptr); if (XR_FAILED(result)) { print_line("OpenXR: Failed to get swapchaim image count [", OpenXRAPI::get_singleton()->get_error_string(result), "]"); return false; } #ifdef ANDROID_ENABLED XrSwapchainImageOpenGLESKHR *images = (XrSwapchainImageOpenGLESKHR *)memalloc(sizeof(XrSwapchainImageOpenGLESKHR) * swapchain_length); #else XrSwapchainImageOpenGLKHR *images = (XrSwapchainImageOpenGLKHR *)memalloc(sizeof(XrSwapchainImageOpenGLKHR) * swapchain_length); #endif ERR_FAIL_NULL_V_MSG(images, false, "OpenXR Couldn't allocate memory for swap chain image"); for (uint64_t i = 0; i < swapchain_length; i++) { #ifdef ANDROID_ENABLED images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_ES_KHR; #else images[i].type = XR_TYPE_SWAPCHAIN_IMAGE_OPENGL_KHR; #endif images[i].next = nullptr; images[i].image = 0; } result = xrEnumerateSwapchainImages(p_swapchain, swapchain_length, &swapchain_length, (XrSwapchainImageBaseHeader *)images); if (XR_FAILED(result)) { print_line("OpenXR: Failed to get swapchaim images [", OpenXRAPI::get_singleton()->get_error_string(result), "]"); memfree(images); return false; } SwapchainGraphicsData *data = memnew(SwapchainGraphicsData); if (data == nullptr) { print_line("OpenXR: Failed to allocate memory for swapchain data"); memfree(images); return false; } *r_swapchain_graphics_data = data; data->is_multiview = (p_array_size > 1); Image::Format format = Image::FORMAT_RGBA8; Vector texture_rids; for (uint64_t i = 0; i < swapchain_length; i++) { RID texture_rid = texture_storage->texture_create_external( p_array_size == 1 ? GLES3::Texture::TYPE_2D : GLES3::Texture::TYPE_LAYERED, format, images[i].image, p_width, p_height, 1, p_array_size); texture_rids.push_back(texture_rid); } data->texture_rids = texture_rids; memfree(images); return true; } bool OpenXROpenGLExtension::create_projection_fov(const XrFovf p_fov, double p_z_near, double p_z_far, Projection &r_camera_matrix) { XrMatrix4x4f matrix; XrMatrix4x4f_CreateProjectionFov(&matrix, GRAPHICS_OPENGL, p_fov, (float)p_z_near, (float)p_z_far); for (int j = 0; j < 4; j++) { for (int i = 0; i < 4; i++) { r_camera_matrix.columns[j][i] = matrix.m[j * 4 + i]; } } return true; } RID OpenXROpenGLExtension::get_texture(void *p_swapchain_graphics_data, int p_image_index) { SwapchainGraphicsData *data = (SwapchainGraphicsData *)p_swapchain_graphics_data; ERR_FAIL_NULL_V(data, RID()); ERR_FAIL_INDEX_V(p_image_index, data->texture_rids.size(), RID()); return data->texture_rids[p_image_index]; } void OpenXROpenGLExtension::cleanup_swapchain_graphics_data(void **p_swapchain_graphics_data) { if (*p_swapchain_graphics_data == nullptr) { return; } GLES3::TextureStorage *texture_storage = GLES3::TextureStorage::get_singleton(); ERR_FAIL_NULL(texture_storage); SwapchainGraphicsData *data = (SwapchainGraphicsData *)*p_swapchain_graphics_data; for (int i = 0; i < data->texture_rids.size(); i++) { texture_storage->texture_free(data->texture_rids[i]); } data->texture_rids.clear(); memdelete(data); *p_swapchain_graphics_data = nullptr; } #define ENUM_TO_STRING_CASE(e) \ case e: { \ return String(#e); \ } break; String OpenXROpenGLExtension::get_swapchain_format_name(int64_t p_swapchain_format) const { // These are somewhat different per platform, will need to weed some stuff out... switch (p_swapchain_format) { #ifdef ANDROID_ENABLED // using definitions from GLES3/gl3.h ENUM_TO_STRING_CASE(GL_RGBA4) ENUM_TO_STRING_CASE(GL_RGB5_A1) ENUM_TO_STRING_CASE(GL_RGB565) ENUM_TO_STRING_CASE(GL_RGB8) ENUM_TO_STRING_CASE(GL_RGBA8) ENUM_TO_STRING_CASE(GL_RGB10_A2) ENUM_TO_STRING_CASE(GL_RGBA32F) ENUM_TO_STRING_CASE(GL_RGB32F) ENUM_TO_STRING_CASE(GL_RGBA16F) ENUM_TO_STRING_CASE(GL_RGB16F) ENUM_TO_STRING_CASE(GL_R11F_G11F_B10F) ENUM_TO_STRING_CASE(GL_UNSIGNED_INT_10F_11F_11F_REV) ENUM_TO_STRING_CASE(GL_RGB9_E5) ENUM_TO_STRING_CASE(GL_UNSIGNED_INT_5_9_9_9_REV) ENUM_TO_STRING_CASE(GL_RGBA32UI) ENUM_TO_STRING_CASE(GL_RGB32UI) ENUM_TO_STRING_CASE(GL_RGBA16UI) ENUM_TO_STRING_CASE(GL_RGB16UI) ENUM_TO_STRING_CASE(GL_RGBA8UI) ENUM_TO_STRING_CASE(GL_RGB8UI) ENUM_TO_STRING_CASE(GL_RGBA32I) ENUM_TO_STRING_CASE(GL_RGB32I) ENUM_TO_STRING_CASE(GL_RGBA16I) ENUM_TO_STRING_CASE(GL_RGB16I) ENUM_TO_STRING_CASE(GL_RGBA8I) ENUM_TO_STRING_CASE(GL_RGB8I) ENUM_TO_STRING_CASE(GL_RG) ENUM_TO_STRING_CASE(GL_RG_INTEGER) ENUM_TO_STRING_CASE(GL_R8) ENUM_TO_STRING_CASE(GL_RG8) ENUM_TO_STRING_CASE(GL_R16F) ENUM_TO_STRING_CASE(GL_R32F) ENUM_TO_STRING_CASE(GL_RG16F) ENUM_TO_STRING_CASE(GL_RG32F) ENUM_TO_STRING_CASE(GL_R8I) ENUM_TO_STRING_CASE(GL_R8UI) ENUM_TO_STRING_CASE(GL_R16I) ENUM_TO_STRING_CASE(GL_R16UI) ENUM_TO_STRING_CASE(GL_R32I) ENUM_TO_STRING_CASE(GL_R32UI) ENUM_TO_STRING_CASE(GL_RG8I) ENUM_TO_STRING_CASE(GL_RG8UI) ENUM_TO_STRING_CASE(GL_RG16I) ENUM_TO_STRING_CASE(GL_RG16UI) ENUM_TO_STRING_CASE(GL_RG32I) ENUM_TO_STRING_CASE(GL_RG32UI) ENUM_TO_STRING_CASE(GL_R8_SNORM) ENUM_TO_STRING_CASE(GL_RG8_SNORM) ENUM_TO_STRING_CASE(GL_RGB8_SNORM) ENUM_TO_STRING_CASE(GL_RGBA8_SNORM) ENUM_TO_STRING_CASE(GL_RGB10_A2UI) ENUM_TO_STRING_CASE(GL_SRGB) ENUM_TO_STRING_CASE(GL_SRGB8) ENUM_TO_STRING_CASE(GL_SRGB8_ALPHA8) ENUM_TO_STRING_CASE(GL_COMPRESSED_R11_EAC) ENUM_TO_STRING_CASE(GL_COMPRESSED_SIGNED_R11_EAC) ENUM_TO_STRING_CASE(GL_COMPRESSED_RG11_EAC) ENUM_TO_STRING_CASE(GL_COMPRESSED_SIGNED_RG11_EAC) ENUM_TO_STRING_CASE(GL_COMPRESSED_RGB8_ETC2) ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_ETC2) ENUM_TO_STRING_CASE(GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2) ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2) ENUM_TO_STRING_CASE(GL_COMPRESSED_RGBA8_ETC2_EAC) ENUM_TO_STRING_CASE(GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT16) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT24) ENUM_TO_STRING_CASE(GL_DEPTH24_STENCIL8) #else // using definitions from GLAD ENUM_TO_STRING_CASE(GL_R8_SNORM) ENUM_TO_STRING_CASE(GL_RG8_SNORM) ENUM_TO_STRING_CASE(GL_RGB8_SNORM) ENUM_TO_STRING_CASE(GL_RGBA8_SNORM) ENUM_TO_STRING_CASE(GL_R16_SNORM) ENUM_TO_STRING_CASE(GL_RG16_SNORM) ENUM_TO_STRING_CASE(GL_RGB16_SNORM) ENUM_TO_STRING_CASE(GL_RGBA16_SNORM) ENUM_TO_STRING_CASE(GL_RGB4) ENUM_TO_STRING_CASE(GL_RGB5) ENUM_TO_STRING_CASE(GL_RGB8) ENUM_TO_STRING_CASE(GL_RGB10) ENUM_TO_STRING_CASE(GL_RGB12) ENUM_TO_STRING_CASE(GL_RGB16) ENUM_TO_STRING_CASE(GL_RGBA2) ENUM_TO_STRING_CASE(GL_RGBA4) ENUM_TO_STRING_CASE(GL_RGB5_A1) ENUM_TO_STRING_CASE(GL_RGBA8) ENUM_TO_STRING_CASE(GL_RGB10_A2) ENUM_TO_STRING_CASE(GL_RGBA12) ENUM_TO_STRING_CASE(GL_RGBA16) ENUM_TO_STRING_CASE(GL_RGBA32F) ENUM_TO_STRING_CASE(GL_RGB32F) ENUM_TO_STRING_CASE(GL_RGBA16F) ENUM_TO_STRING_CASE(GL_RGB16F) ENUM_TO_STRING_CASE(GL_RGBA32UI) ENUM_TO_STRING_CASE(GL_RGB32UI) ENUM_TO_STRING_CASE(GL_RGBA16UI) ENUM_TO_STRING_CASE(GL_RGB16UI) ENUM_TO_STRING_CASE(GL_RGBA8UI) ENUM_TO_STRING_CASE(GL_RGB8UI) ENUM_TO_STRING_CASE(GL_RGBA32I) ENUM_TO_STRING_CASE(GL_RGB32I) ENUM_TO_STRING_CASE(GL_RGBA16I) ENUM_TO_STRING_CASE(GL_RGB16I) ENUM_TO_STRING_CASE(GL_RGBA8I) ENUM_TO_STRING_CASE(GL_RGB8I) ENUM_TO_STRING_CASE(GL_RGB10_A2UI) ENUM_TO_STRING_CASE(GL_SRGB) ENUM_TO_STRING_CASE(GL_SRGB8) ENUM_TO_STRING_CASE(GL_SRGB_ALPHA) ENUM_TO_STRING_CASE(GL_SRGB8_ALPHA8) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT16) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT24) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT32) ENUM_TO_STRING_CASE(GL_DEPTH24_STENCIL8) ENUM_TO_STRING_CASE(GL_R11F_G11F_B10F) ENUM_TO_STRING_CASE(GL_DEPTH_COMPONENT32F) ENUM_TO_STRING_CASE(GL_DEPTH32F_STENCIL8) #endif default: { return String("Swapchain format 0x") + String::num_int64(p_swapchain_format, 16); } break; } } #endif // GLES3_ENABLED