296 lines
11 KiB
C++
296 lines
11 KiB
C++
/**************************************************************************/
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/* openxr_composition_layer_extension.cpp */
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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) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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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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#include "openxr_composition_layer_extension.h"
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#include "servers/rendering/rendering_server_globals.h"
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////////////////////////////////////////////////////////////////////////////
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// OpenXRCompositionLayerExtension
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OpenXRCompositionLayerExtension *OpenXRCompositionLayerExtension::singleton = nullptr;
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OpenXRCompositionLayerExtension *OpenXRCompositionLayerExtension::get_singleton() {
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return singleton;
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}
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OpenXRCompositionLayerExtension::OpenXRCompositionLayerExtension() {
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singleton = this;
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}
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OpenXRCompositionLayerExtension::~OpenXRCompositionLayerExtension() {
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singleton = nullptr;
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}
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HashMap<String, bool *> OpenXRCompositionLayerExtension::get_requested_extensions() {
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HashMap<String, bool *> request_extensions;
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request_extensions[XR_KHR_COMPOSITION_LAYER_CYLINDER_EXTENSION_NAME] = &cylinder_ext_available;
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request_extensions[XR_KHR_COMPOSITION_LAYER_EQUIRECT2_EXTENSION_NAME] = &equirect_ext_available;
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return request_extensions;
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}
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void OpenXRCompositionLayerExtension::on_session_created(const XrSession p_instance) {
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OpenXRAPI::get_singleton()->register_composition_layer_provider(this);
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}
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void OpenXRCompositionLayerExtension::on_session_destroyed() {
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OpenXRAPI::get_singleton()->unregister_composition_layer_provider(this);
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}
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void OpenXRCompositionLayerExtension::on_pre_render() {
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for (OpenXRViewportCompositionLayerProvider *composition_layer : composition_layers) {
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composition_layer->on_pre_render();
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}
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}
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int OpenXRCompositionLayerExtension::get_composition_layer_count() {
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return composition_layers.size();
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}
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XrCompositionLayerBaseHeader *OpenXRCompositionLayerExtension::get_composition_layer(int p_index) {
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ERR_FAIL_INDEX_V(p_index, composition_layers.size(), nullptr);
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return composition_layers[p_index]->get_composition_layer();
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}
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int OpenXRCompositionLayerExtension::get_composition_layer_order(int p_index) {
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ERR_FAIL_INDEX_V(p_index, composition_layers.size(), 1);
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return composition_layers[p_index]->get_sort_order();
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}
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void OpenXRCompositionLayerExtension::register_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer) {
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composition_layers.push_back(p_composition_layer);
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}
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void OpenXRCompositionLayerExtension::unregister_composition_layer_provider(OpenXRViewportCompositionLayerProvider *p_composition_layer) {
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composition_layers.erase(p_composition_layer);
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}
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bool OpenXRCompositionLayerExtension::is_available(XrStructureType p_which) {
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switch (p_which) {
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case XR_TYPE_COMPOSITION_LAYER_QUAD: {
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// Doesn't require an extension.
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return true;
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} break;
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case XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR: {
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return cylinder_ext_available;
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} break;
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case XR_TYPE_COMPOSITION_LAYER_EQUIRECT2_KHR: {
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return equirect_ext_available;
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} break;
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default: {
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ERR_PRINT(vformat("Unsupported composition layer type: %s", p_which));
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return false;
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}
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}
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}
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////////////////////////////////////////////////////////////////////////////
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// OpenXRViewportCompositionLayerProvider
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OpenXRViewportCompositionLayerProvider::OpenXRViewportCompositionLayerProvider(XrCompositionLayerBaseHeader *p_composition_layer) {
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composition_layer = p_composition_layer;
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openxr_api = OpenXRAPI::get_singleton();
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composition_layer_extension = OpenXRCompositionLayerExtension::get_singleton();
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}
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OpenXRViewportCompositionLayerProvider::~OpenXRViewportCompositionLayerProvider() {
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// This will reset the viewport and free the swapchain too.
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set_viewport(RID(), Size2i());
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}
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void OpenXRViewportCompositionLayerProvider::set_alpha_blend(bool p_alpha_blend) {
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if (alpha_blend != p_alpha_blend) {
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alpha_blend = p_alpha_blend;
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if (alpha_blend) {
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composition_layer->layerFlags |= XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
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} else {
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composition_layer->layerFlags &= ~XR_COMPOSITION_LAYER_BLEND_TEXTURE_SOURCE_ALPHA_BIT;
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}
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}
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}
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void OpenXRViewportCompositionLayerProvider::set_viewport(RID p_viewport, Size2i p_size) {
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RenderingServer *rs = RenderingServer::get_singleton();
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ERR_FAIL_NULL(rs);
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if (viewport != p_viewport) {
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if (viewport.is_valid()) {
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RID rt = rs->viewport_get_render_target(viewport);
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RSG::texture_storage->render_target_set_override(rt, RID(), RID(), RID());
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}
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viewport = p_viewport;
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if (viewport.is_valid()) {
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viewport_size = p_size;
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} else {
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free_swapchain();
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viewport_size = Size2i();
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}
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}
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}
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void OpenXRViewportCompositionLayerProvider::on_pre_render() {
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RenderingServer *rs = RenderingServer::get_singleton();
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ERR_FAIL_NULL(rs);
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if (viewport.is_valid() && openxr_api && openxr_api->is_running()) {
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RS::ViewportUpdateMode update_mode = rs->viewport_get_update_mode(viewport);
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if (update_mode == RS::VIEWPORT_UPDATE_ONCE || update_mode == RS::VIEWPORT_UPDATE_ALWAYS) {
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// Update our XR swapchain
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if (update_and_acquire_swapchain(update_mode == RS::VIEWPORT_UPDATE_ONCE)) {
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// Render to our XR swapchain image.
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RID rt = rs->viewport_get_render_target(viewport);
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RSG::texture_storage->render_target_set_override(rt, get_current_swapchain_texture(), RID(), RID());
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}
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}
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}
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}
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XrCompositionLayerBaseHeader *OpenXRViewportCompositionLayerProvider::get_composition_layer() {
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if (openxr_api == nullptr || composition_layer_extension == nullptr) {
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// OpenXR not initialised or we're in the editor?
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return nullptr;
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}
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if (!composition_layer_extension->is_available(composition_layer->type)) {
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// Selected type is not supported, ignore our layer.
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return nullptr;
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}
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if (swapchain_info.swapchain == XR_NULL_HANDLE) {
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// Don't have a swapchain to display? Ignore our layer.
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return nullptr;
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}
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if (swapchain_info.image_acquired) {
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openxr_api->release_image(swapchain_info);
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}
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// Update the layer struct for the swapchain.
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switch (composition_layer->type) {
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case XR_TYPE_COMPOSITION_LAYER_QUAD: {
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XrCompositionLayerQuad *quad_layer = (XrCompositionLayerQuad *)composition_layer;
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quad_layer->subImage.swapchain = swapchain_info.swapchain;
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quad_layer->subImage.imageArrayIndex = 0;
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quad_layer->subImage.imageRect.offset.x = 0;
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quad_layer->subImage.imageRect.offset.y = 0;
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quad_layer->subImage.imageRect.extent.width = swapchain_size.width;
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quad_layer->subImage.imageRect.extent.height = swapchain_size.height;
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} break;
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case XR_TYPE_COMPOSITION_LAYER_CYLINDER_KHR: {
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XrCompositionLayerCylinderKHR *cylinder_layer = (XrCompositionLayerCylinderKHR *)composition_layer;
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cylinder_layer->subImage.swapchain = swapchain_info.swapchain;
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cylinder_layer->subImage.imageArrayIndex = 0;
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cylinder_layer->subImage.imageRect.offset.x = 0;
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cylinder_layer->subImage.imageRect.offset.y = 0;
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cylinder_layer->subImage.imageRect.extent.width = swapchain_size.width;
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cylinder_layer->subImage.imageRect.extent.height = swapchain_size.height;
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} break;
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case XR_TYPE_COMPOSITION_LAYER_EQUIRECT2_KHR: {
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XrCompositionLayerEquirect2KHR *equirect_layer = (XrCompositionLayerEquirect2KHR *)composition_layer;
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equirect_layer->subImage.swapchain = swapchain_info.swapchain;
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equirect_layer->subImage.imageArrayIndex = 0;
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equirect_layer->subImage.imageRect.offset.x = 0;
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equirect_layer->subImage.imageRect.offset.y = 0;
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equirect_layer->subImage.imageRect.extent.width = swapchain_size.width;
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equirect_layer->subImage.imageRect.extent.height = swapchain_size.height;
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} break;
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default: {
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return nullptr;
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} break;
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}
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return composition_layer;
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}
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bool OpenXRViewportCompositionLayerProvider::update_and_acquire_swapchain(bool p_static_image) {
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if (openxr_api == nullptr || composition_layer_extension == nullptr) {
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// OpenXR not initialised or we're in the editor?
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return false;
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}
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if (!composition_layer_extension->is_available(composition_layer->type)) {
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// Selected type is not supported?
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return false;
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}
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// See if our current swapchain is outdated.
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if (swapchain_info.swapchain != XR_NULL_HANDLE) {
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// If this swap chain, or the previous one, were static, then we can't reuse it.
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if (swapchain_size == viewport_size && !p_static_image && !static_image) {
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// We're all good! Just acquire it.
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return openxr_api->acquire_image(swapchain_info);
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}
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openxr_api->free_swapchain(swapchain_info);
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}
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// Create our new swap chain
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int64_t swapchain_format = openxr_api->get_color_swapchain_format();
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const uint32_t sample_count = 3;
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const uint32_t array_size = 1;
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XrSwapchainCreateFlags create_flags = 0;
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if (p_static_image) {
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create_flags |= XR_SWAPCHAIN_CREATE_STATIC_IMAGE_BIT;
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}
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if (!openxr_api->create_swapchain(create_flags, XR_SWAPCHAIN_USAGE_SAMPLED_BIT | XR_SWAPCHAIN_USAGE_COLOR_ATTACHMENT_BIT | XR_SWAPCHAIN_USAGE_MUTABLE_FORMAT_BIT, swapchain_format, viewport_size.width, viewport_size.height, sample_count, array_size, swapchain_info.swapchain, &swapchain_info.swapchain_graphics_data)) {
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swapchain_size = Size2i();
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return false;
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}
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// Acquire our image so we can start rendering into it
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bool ret = openxr_api->acquire_image(swapchain_info);
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swapchain_size = viewport_size;
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static_image = p_static_image;
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return ret;
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}
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void OpenXRViewportCompositionLayerProvider::free_swapchain() {
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if (swapchain_info.swapchain != XR_NULL_HANDLE) {
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openxr_api->free_swapchain(swapchain_info);
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}
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swapchain_size = Size2i();
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static_image = false;
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}
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RID OpenXRViewportCompositionLayerProvider::get_current_swapchain_texture() {
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if (openxr_api == nullptr) {
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return RID();
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}
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return openxr_api->get_image(swapchain_info);
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}
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