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#include "imgui/imgui_impl_glfw.h"
#include "imgui/imgui_impl_opengl3.h"
#ifdef __EMSCRIPTEN__
# include <GLES2/gl2.h>
# include <emscripten/html5.h>
#else
# include "imgui/imgui_impl_opengl3_loader.h"
#endif
#include <chrono>
#include <GLFW/glfw3.h>
#include <stdio.h>
#include <stdlib.h>
#include <thread>
#include "../../server/TracyImGui.hpp"
#include "Backend.hpp"
#include "RunQueue.hpp"
static GLFWwindow* s_window;
static std::function<void()> s_redraw;
static RunQueue* s_mainThreadTasks;
static WindowPosition* s_winPos;
static bool s_iconified;
static void glfw_error_callback( int error, const char* description )
{
fprintf(stderr, "Error %d: %s\n", error, description);
}
static void glfw_window_pos_callback( GLFWwindow* window, int x, int y )
{
if( !glfwGetWindowAttrib( window, GLFW_MAXIMIZED ) )
{
s_winPos->x = x;
s_winPos->y = y;
}
}
static void glfw_window_size_callback( GLFWwindow* window, int w, int h )
{
if( !glfwGetWindowAttrib( window, GLFW_MAXIMIZED ) )
{
s_winPos->w = w;
s_winPos->h = h;
}
tracy::s_wasActive = true;
}
static void glfw_window_maximize_callback( GLFWwindow*, int maximized )
{
s_winPos->maximize = maximized;
}
static void glfw_window_iconify_callback( GLFWwindow*, int iconified )
{
s_iconified = iconified != 0;
}
Backend::Backend( const char* title, std::function<void()> redraw, RunQueue* mainThreadTasks )
{
glfwSetErrorCallback( glfw_error_callback );
if( !glfwInit() ) exit( 1 );
#ifdef DISPLAY_SERVER_WAYLAND
glfwWindowHint( GLFW_ALPHA_BITS, 0 );
#else
glfwWindowHint( GLFW_VISIBLE, 0 );
#endif
glfwWindowHint( GLFW_CONTEXT_VERSION_MAJOR, 3 );
glfwWindowHint( GLFW_CONTEXT_VERSION_MINOR, 2 );
glfwWindowHint( GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE );
#if __APPLE__
glfwWindowHint( GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE );
#endif
s_window = glfwCreateWindow( m_winPos.w, m_winPos.h, title, NULL, NULL );
if( !s_window ) exit( 1 );
glfwSetWindowPos( s_window, m_winPos.x, m_winPos.y );
#if GLFW_VERSION_MAJOR > 3 || ( GLFW_VERSION_MAJOR == 3 && GLFW_VERSION_MINOR >= 2 )
if( m_winPos.maximize ) glfwMaximizeWindow( s_window );
#endif
glfwMakeContextCurrent( s_window );
glfwSwapInterval( 1 ); // Enable vsync
glfwSetWindowRefreshCallback( s_window, []( GLFWwindow* ) { tracy::s_wasActive = true; s_redraw(); } );
ImGui_ImplGlfw_InitForOpenGL( s_window, true );
#ifdef __EMSCRIPTEN__
ImGui_ImplOpenGL3_Init( "#version 100" );
#else
ImGui_ImplOpenGL3_Init( "#version 150" );
#endif
s_redraw = redraw;
s_mainThreadTasks = mainThreadTasks;
s_winPos = &m_winPos;
s_iconified = false;
glfwSetWindowPosCallback( s_window, glfw_window_pos_callback );
glfwSetWindowSizeCallback( s_window, glfw_window_size_callback );
#if GLFW_VERSION_MAJOR > 3 || ( GLFW_VERSION_MAJOR == 3 && GLFW_VERSION_MINOR >= 3 )
glfwSetWindowMaximizeCallback( s_window, glfw_window_maximize_callback );
#endif
glfwSetWindowIconifyCallback( s_window, glfw_window_iconify_callback );
}
Backend::~Backend()
{
ImGui_ImplOpenGL3_Shutdown();
ImGui_ImplGlfw_Shutdown();
glfwDestroyWindow( s_window );
glfwTerminate();
}
void Backend::Show()
{
glfwShowWindow( s_window );
}
void Backend::Run()
{
#ifdef __EMSCRIPTEN__
emscripten_set_main_loop( []() {
glfwPollEvents();
s_redraw();
s_mainThreadTasks->Run();
}, 0, 1 );
#else
while( !glfwWindowShouldClose( s_window ) )
{
if( s_iconified )
{
glfwWaitEvents();
}
else
{
glfwPollEvents();
s_redraw();
if( !glfwGetWindowAttrib( s_window, GLFW_FOCUSED ) )
{
std::this_thread::sleep_for( std::chrono::milliseconds( 50 ) );
}
s_mainThreadTasks->Run();
}
}
#endif
}
void Backend::Attention()
{
#if GLFW_VERSION_MAJOR > 3 || ( GLFW_VERSION_MAJOR == 3 && GLFW_VERSION_MINOR >= 3 )
if( !glfwGetWindowAttrib( s_window, GLFW_FOCUSED ) )
{
glfwRequestWindowAttention( s_window );
}
#endif
}
void Backend::NewFrame( int& w, int& h )
{
glfwGetFramebufferSize( s_window, &w, &h );
m_w = w;
m_h = h;
ImGui_ImplOpenGL3_NewFrame();
ImGui_ImplGlfw_NewFrame();
}
void Backend::EndFrame()
{
const ImVec4 clear_color = ImColor( 114, 144, 154 );
ImGui::Render();
glViewport( 0, 0, m_w, m_h );
glClearColor( clear_color.x, clear_color.y, clear_color.z, clear_color.w );
glClear( GL_COLOR_BUFFER_BIT );
ImGui_ImplOpenGL3_RenderDrawData( ImGui::GetDrawData() );
glfwSwapBuffers( s_window );
}
void Backend::SetIcon( uint8_t* data, int w, int h )
{
GLFWimage icon;
icon.width = w;
icon.height = h;
icon.pixels = data;
glfwSetWindowIcon( s_window, 1, &icon );
}
void Backend::SetTitle( const char* title )
{
glfwSetWindowTitle( s_window, title );
}
float Backend::GetDpiScale()
{
#ifdef __EMSCRIPTEN__
return EM_ASM_DOUBLE( { return window.devicePixelRatio; } );
#elif GLFW_VERSION_MAJOR > 3 || ( GLFW_VERSION_MAJOR == 3 && GLFW_VERSION_MINOR >= 3 )
auto monitor = glfwGetWindowMonitor( s_window );
if( !monitor ) monitor = glfwGetPrimaryMonitor();
if( monitor )
{
float x, y;
glfwGetMonitorContentScale( monitor, &x, &y );
return x;
}
#endif
return 1;
}
#ifdef __EMSCRIPTEN__
extern "C" int nativeResize( int width, int height )
{
glfwSetWindowSize( s_window, width, height );
return 0;
}
#endif
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