Initial commit: OpenXR simulator runtime, compositor, configurator, docs
This commit is contained in:
Konstantin Uni
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// OpenXR Simulator configurator.
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//
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// A small GLFW + Dear ImGui tool that edits the runtime's JSON config file. The runtime DLL reads
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// the same file (resolved via XRSIM_CONFIG, else <dll-dir>/openxr_simulator_config.json).
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#define GLFW_INCLUDE_NONE
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#ifdef _WIN32
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# ifndef WIN32_LEAN_AND_MEAN
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# define WIN32_LEAN_AND_MEAN
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# endif
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# include <windows.h>
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#endif
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#include <GL/gl.h>
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#include <GLFW/glfw3.h>
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#include "imgui.h"
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#include "imgui_impl_glfw.h"
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#include "imgui_impl_opengl3.h"
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#include "Config.h"
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#include "HeadsetPresets.h"
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#include <cstring>
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#include <string>
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namespace
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{
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int PresentModeIndex( xrsim::PresentMode mode )
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{
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switch ( mode )
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{
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case xrsim::PresentMode::Mailbox: return 0;
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case xrsim::PresentMode::Immediate: return 1;
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case xrsim::PresentMode::Fifo: return 2;
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}
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return 0;
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}
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int DisplayModeIndex( xrsim::DisplayMode mode )
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{
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switch ( mode )
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{
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case xrsim::DisplayMode::SideBySide: return 0;
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case xrsim::DisplayMode::SingleEyeLeft: return 1;
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case xrsim::DisplayMode::SingleEyeRight: return 2;
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}
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return 0;
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}
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} // namespace
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int main( int, char ** )
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{
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if ( glfwInit() != GLFW_TRUE )
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{
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return 1;
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}
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const char * glslVersion = "#version 130";
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glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
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glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 0 );
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GLFWwindow * window =
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glfwCreateWindow( 920, 720, "OpenXR Simulator Configurator", nullptr, nullptr );
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if ( window == nullptr )
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{
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glfwTerminate();
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return 1;
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}
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glfwMakeContextCurrent( window );
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glfwSwapInterval( 1 );
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IMGUI_CHECKVERSION();
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ImGui::CreateContext();
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ImGui::StyleColorsDark();
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ImGui_ImplGlfw_InitForOpenGL( window, true );
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ImGui_ImplOpenGL3_Init( glslVersion );
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std::string configPath = xrsim::SimulatorConfig::ResolvePath();
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xrsim::SimulatorConfig config = xrsim::SimulatorConfig::LoadFrom( configPath );
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std::string status;
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while ( glfwWindowShouldClose( window ) == 0 )
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{
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glfwPollEvents();
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ImGui_ImplOpenGL3_NewFrame();
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ImGui_ImplGlfw_NewFrame();
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ImGui::NewFrame();
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const ImGuiViewport * viewport = ImGui::GetMainViewport();
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ImGui::SetNextWindowPos( viewport->WorkPos );
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ImGui::SetNextWindowSize( viewport->WorkSize );
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ImGui::Begin(
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"OpenXR Simulator Config", nullptr,
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ImGuiWindowFlags_NoDecoration | ImGuiWindowFlags_NoMove | ImGuiWindowFlags_NoResize
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);
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ImGui::TextWrapped(
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"These settings are read by openxr_simulator.dll at runtime startup. Restart the "
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"application after saving."
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);
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ImGui::Separator();
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static char pathBuffer[1024] = {};
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if ( pathBuffer[0] == '\0' )
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{
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std::strncpy( pathBuffer, configPath.c_str(), sizeof( pathBuffer ) - 1 );
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}
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if ( ImGui::InputText( "Config path", pathBuffer, sizeof( pathBuffer ) ) )
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{
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configPath = pathBuffer;
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}
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if ( ImGui::Button( "Reload" ) )
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{
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config = xrsim::SimulatorConfig::LoadFrom( configPath );
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status = "Reloaded.";
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}
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ImGui::SameLine();
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if ( ImGui::Button( "Save" ) )
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{
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status = config.Save( configPath ) ? "Saved." : "Failed to save!";
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}
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ImGui::SameLine();
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if ( ImGui::Button( "Reset to defaults" ) )
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{
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config = xrsim::SimulatorConfig{};
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status = "Reset to defaults (not saved yet).";
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}
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if ( !status.empty() )
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{
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ImGui::SameLine();
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ImGui::TextColored( ImVec4( 0.5f, 0.9f, 0.5f, 1.0f ), "%s", status.c_str() );
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}
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ImGui::Separator();
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{
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constexpr int presetCount = static_cast<int>( xrsim::kHeadsetPresets.size() );
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static const char * presetItems[presetCount + 1] = {};
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if ( presetItems[0] == nullptr )
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{
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presetItems[0] = "Custom";
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for ( int i = 0; i < presetCount; ++i )
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{
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presetItems[i + 1] = xrsim::kHeadsetPresets[i].name;
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}
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}
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static int presetIndex = 0;
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if ( ImGui::Combo( "Headset preset", &presetIndex, presetItems, presetCount + 1 ) &&
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presetIndex > 0 )
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{
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const xrsim::HeadsetPreset & preset = xrsim::kHeadsetPresets[presetIndex - 1];
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config.systemName = preset.name;
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config.eyeWidth = preset.eyeWidth;
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config.eyeHeight = preset.eyeHeight;
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config.refreshRateHz = preset.refreshRateHz;
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config.fovLeftDeg = preset.fovLeftDeg;
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config.fovRightDeg = preset.fovRightDeg;
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config.fovUpDeg = preset.fovUpDeg;
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config.fovDownDeg = preset.fovDownDeg;
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config.ipdMeters = preset.ipdMeters;
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status = std::string( "Applied preset: " ) + preset.name;
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}
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}
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ImGui::Separator();
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if ( ImGui::CollapsingHeader( "Headset", ImGuiTreeNodeFlags_DefaultOpen ) )
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{
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char nameBuffer[256];
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std::strncpy( nameBuffer, config.systemName.c_str(), sizeof( nameBuffer ) - 1 );
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nameBuffer[sizeof( nameBuffer ) - 1] = '\0';
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if ( ImGui::InputText( "System name", nameBuffer, sizeof( nameBuffer ) ) )
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{
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config.systemName = nameBuffer;
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}
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ImGui::InputScalar( "Vendor id", ImGuiDataType_U32, &config.vendorId );
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}
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if ( ImGui::CollapsingHeader( "Display", ImGuiTreeNodeFlags_DefaultOpen ) )
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{
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ImGui::InputScalar( "Eye width", ImGuiDataType_U32, &config.eyeWidth );
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ImGui::InputScalar( "Eye height", ImGuiDataType_U32, &config.eyeHeight );
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ImGui::InputScalar( "Refresh rate (Hz)", ImGuiDataType_U32, &config.refreshRateHz );
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ImGui::SliderFloat( "IPD (m)", &config.ipdMeters, 0.04f, 0.09f, "%.3f" );
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ImGui::InputScalar( "Swapchain images", ImGuiDataType_U32, &config.swapchainImageCount );
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}
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if ( ImGui::CollapsingHeader( "Field of view (half-angle degrees)", ImGuiTreeNodeFlags_DefaultOpen ) )
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{
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ImGui::SliderFloat( "Left", &config.fovLeftDeg, 20.0f, 80.0f, "%.1f" );
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ImGui::SliderFloat( "Right", &config.fovRightDeg, 20.0f, 80.0f, "%.1f" );
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ImGui::SliderFloat( "Up", &config.fovUpDeg, 20.0f, 80.0f, "%.1f" );
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ImGui::SliderFloat( "Down", &config.fovDownDeg, 20.0f, 80.0f, "%.1f" );
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if ( ImGui::Button( "Symmetric" ) )
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{
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config.fovRightDeg = config.fovLeftDeg;
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config.fovUpDeg = config.fovLeftDeg;
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config.fovDownDeg = config.fovLeftDeg;
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}
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}
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if ( ImGui::CollapsingHeader( "Compositor window", ImGuiTreeNodeFlags_DefaultOpen ) )
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{
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char titleBuffer[256];
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std::strncpy( titleBuffer, config.windowTitle.c_str(), sizeof( titleBuffer ) - 1 );
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titleBuffer[sizeof( titleBuffer ) - 1] = '\0';
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if ( ImGui::InputText( "Window title", titleBuffer, sizeof( titleBuffer ) ) )
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{
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config.windowTitle = titleBuffer;
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}
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ImGui::InputInt( "Window width", &config.windowWidth );
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ImGui::InputInt( "Window height", &config.windowHeight );
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int presentIndex = PresentModeIndex( config.presentMode );
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const char * presentItems[] = { "Mailbox (uncapped)", "Immediate (uncapped, tearing)",
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"FIFO (vsync)" };
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if ( ImGui::Combo( "Present mode", &presentIndex, presentItems, IM_ARRAYSIZE( presentItems ) ) )
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{
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config.presentMode = static_cast<xrsim::PresentMode>( presentIndex );
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}
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int displayIndex = DisplayModeIndex( config.displayMode );
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const char * displayItems[] = { "Side by side", "Single eye (left)", "Single eye (right)" };
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if ( ImGui::Combo( "Display mode", &displayIndex, displayItems, IM_ARRAYSIZE( displayItems ) ) )
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{
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config.displayMode = static_cast<xrsim::DisplayMode>( displayIndex );
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}
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}
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ImGui::Separator();
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ImGui::TextDisabled(
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"Note: 'Mailbox' avoids capping the application to the monitor refresh rate."
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);
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ImGui::End();
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ImGui::Render();
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int displayWidth = 0, displayHeight = 0;
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glfwGetFramebufferSize( window, &displayWidth, &displayHeight );
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glViewport( 0, 0, displayWidth, displayHeight );
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glClearColor( 0.10f, 0.10f, 0.12f, 1.0f );
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glClear( GL_COLOR_BUFFER_BIT );
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ImGui_ImplOpenGL3_RenderDrawData( ImGui::GetDrawData() );
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glfwSwapBuffers( window );
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}
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ImGui_ImplOpenGL3_Shutdown();
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ImGui_ImplGlfw_Shutdown();
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ImGui::DestroyContext();
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glfwDestroyWindow( window );
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glfwTerminate();
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return 0;
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}
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