diff options
Diffstat (limited to 'modules/openxr/extensions')
| -rw-r--r-- | modules/openxr/extensions/openxr_extension_wrapper.h | 4 | ||||
| -rw-r--r-- | modules/openxr/extensions/openxr_opengl_extension.cpp | 41 | ||||
| -rw-r--r-- | modules/openxr/extensions/openxr_opengl_extension.h | 6 |
3 files changed, 49 insertions, 2 deletions
diff --git a/modules/openxr/extensions/openxr_extension_wrapper.h b/modules/openxr/extensions/openxr_extension_wrapper.h index 84279635b5..2c855c3cde 100644 --- a/modules/openxr/extensions/openxr_extension_wrapper.h +++ b/modules/openxr/extensions/openxr_extension_wrapper.h @@ -80,7 +80,9 @@ public: // this happens right before physics process and normal processing is run. // This is when controller data is queried and made available to game logic. virtual void on_process() {} - virtual void on_pre_render() {} // `on_pre_render` is called right before we start rendering our XR viewport. + virtual void on_pre_render() {} // `on_pre_render` is called right before we start rendering our XR viewports. + virtual void on_pre_draw_viewport(RID p_render_target) {} // `on_pre_draw_viewport` is called right before we start rendering this viewport + virtual void on_post_draw_viewport(RID p_render_target) {} // `on_port_draw_viewport` is called right after we start rendering this viewport (note that on Vulkan draw commands may only be queued) virtual void on_state_idle() {} // `on_state_idle` is called when the OpenXR session state is changed to idle. virtual void on_state_ready() {} // `on_state_ready` is called when the OpenXR session state is changed to ready, this means OpenXR is ready to setup our session. diff --git a/modules/openxr/extensions/openxr_opengl_extension.cpp b/modules/openxr/extensions/openxr_opengl_extension.cpp index 0d201161f1..20ccfe3906 100644 --- a/modules/openxr/extensions/openxr_opengl_extension.cpp +++ b/modules/openxr/extensions/openxr_opengl_extension.cpp @@ -37,6 +37,28 @@ #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<String, bool *> OpenXROpenGLExtension::get_requested_extensions() { HashMap<String, bool *> request_extensions; @@ -157,8 +179,8 @@ void *OpenXROpenGLExtension::set_session_create_and_get_next_pointer(void *p_nex } void OpenXROpenGLExtension::get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) { - p_usable_swap_chains.push_back(GL_RGBA8); p_usable_swap_chains.push_back(GL_SRGB8_ALPHA8); + p_usable_swap_chains.push_back(GL_RGBA8); } void OpenXROpenGLExtension::get_usable_depth_formats(Vector<int64_t> &p_usable_depth_formats) { @@ -168,6 +190,23 @@ void OpenXROpenGLExtension::get_usable_depth_formats(Vector<int64_t> &p_usable_d 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); diff --git a/modules/openxr/extensions/openxr_opengl_extension.h b/modules/openxr/extensions/openxr_opengl_extension.h index 03a640cbfb..29a9f35c51 100644 --- a/modules/openxr/extensions/openxr_opengl_extension.h +++ b/modules/openxr/extensions/openxr_opengl_extension.h @@ -79,6 +79,9 @@ public: virtual void on_instance_created(const XrInstance p_instance) override; virtual void *set_session_create_and_get_next_pointer(void *p_next_pointer) override; + virtual void on_pre_draw_viewport(RID p_render_target) override; + virtual void on_post_draw_viewport(RID p_render_target) override; + virtual void get_usable_swapchain_formats(Vector<int64_t> &p_usable_swap_chains) override; virtual void get_usable_depth_formats(Vector<int64_t> &p_usable_swap_chains) override; virtual String get_swapchain_format_name(int64_t p_swapchain_format) const override; @@ -103,6 +106,9 @@ private: Vector<RID> texture_rids; }; + bool srgb_ext_is_available = true; + bool hw_linear_to_srgb_is_enabled = false; + bool check_graphics_api_support(XrVersion p_desired_version); #ifdef ANDROID_ENABLED |