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Add minimal wayland backend.
This commit is contained in:
Bartosz Taudul
parent
a9be9d65de
commit
ce797d82d5
246
profiler/src/BackendWayland.cpp
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246
profiler/src/BackendWayland.cpp
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#include <EGL/egl.h>
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#include <EGL/eglext.h>
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#include "imgui/imgui_impl_opengl3.h"
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#include "imgui/imgui_impl_opengl3_loader.h"
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#include <chrono>
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#include <stdio.h>
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#include <string.h>
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#include <wayland-client.h>
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#include <wayland-egl.h>
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#include "xdg-shell.h"
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#include "Backend.hpp"
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#include "RunQueue.hpp"
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static std::function<void()> s_redraw;
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static RunQueue* s_mainThreadTasks;
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static struct wl_display* s_dpy;
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static struct wl_compositor* s_comp;
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static struct wl_surface* s_surf;
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static struct wl_egl_window* s_eglWin;
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static struct wl_shm* s_shm;
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static struct xdg_wm_base* s_wm;
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static EGLDisplay s_eglDpy;
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static EGLContext s_eglCtx;
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static EGLSurface s_eglSurf;
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static struct xdg_surface* s_xdgSurf;
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static struct xdg_toplevel* s_toplevel;
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static bool s_running = true;
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static int s_w, s_h;
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static uint64_t s_time;
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static void WmPing( void*, struct xdg_wm_base* shell, uint32_t serial )
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{
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xdg_wm_base_pong( shell, serial );
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}
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constexpr struct xdg_wm_base_listener wmListener = {
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.ping = WmPing
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};
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static void RegistryGlobalCb( void*, struct wl_registry* reg, uint32_t name, const char* interface, uint32_t version )
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{
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if( strcmp( interface, wl_compositor_interface.name ) == 0 )
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{
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s_comp = (wl_compositor*)wl_registry_bind( reg, name, &wl_compositor_interface, 5 );
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}
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else if( strcmp( interface, wl_shm_interface.name ) == 0 )
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{
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s_shm = (wl_shm*)wl_registry_bind( reg, name, &wl_shm_interface, 1 );
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}
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else if( strcmp( interface, xdg_wm_base_interface.name ) == 0 )
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{
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s_wm = (xdg_wm_base*)wl_registry_bind( reg, name, &xdg_wm_base_interface, 1 );
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xdg_wm_base_add_listener( s_wm, &wmListener, nullptr );
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}
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}
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constexpr struct wl_registry_listener registryListener = {
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.global = RegistryGlobalCb
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};
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static void XdgSurfaceConfigure( void*, struct xdg_surface* surf, uint32_t serial )
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{
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xdg_surface_ack_configure( surf, serial );
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}
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constexpr struct xdg_surface_listener surfaceListener = {
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.configure = XdgSurfaceConfigure
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};
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static void XdgToplevelConfigure( void*, struct xdg_toplevel* toplevel, int32_t width, int32_t height, struct wl_array* states )
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{
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if( width == 0 || height == 0 ) return;
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if( s_w != width || s_h != height )
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{
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s_w = width;
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s_h = height;
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wl_egl_window_resize( s_eglWin, width, height, 0, 0 );
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wl_surface_commit( s_surf );
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}
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}
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static void XdgToplevelClose( void*, struct xdg_toplevel* toplevel )
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{
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s_running = false;
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}
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constexpr struct xdg_toplevel_listener toplevelListener = {
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.configure = XdgToplevelConfigure,
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.close = XdgToplevelClose
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};
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Backend::Backend( const char* title, std::function<void()> redraw, RunQueue* mainThreadTasks )
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{
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s_redraw = redraw;
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s_mainThreadTasks = mainThreadTasks;
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s_w = m_winPos.w;
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s_h = m_winPos.h;
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s_dpy = wl_display_connect( nullptr );
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if( !s_dpy ) { fprintf( stderr, "Cannot establish wayland display connection!\n" ); exit( 1 ); }
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wl_registry_add_listener( wl_display_get_registry( s_dpy ), ®istryListener, nullptr );
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wl_display_roundtrip( s_dpy );
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if( !s_comp ) { fprintf( stderr, "No wayland compositor!\n" ); exit( 1 ); }
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if( !s_shm ) { fprintf( stderr, "No wayland shared memory!\n" ); exit( 1 ); }
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if( !s_wm ) { fprintf( stderr, "No wayland window manager!\n" ); exit( 1 ); }
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s_surf = wl_compositor_create_surface( s_comp );
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s_eglWin = wl_egl_window_create( s_surf, m_winPos.w, m_winPos.h );
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s_xdgSurf = xdg_wm_base_get_xdg_surface( s_wm, s_surf );
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xdg_surface_add_listener( s_xdgSurf, &surfaceListener, nullptr );
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s_toplevel = xdg_surface_get_toplevel( s_xdgSurf );
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xdg_toplevel_add_listener( s_toplevel, &toplevelListener, nullptr );
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xdg_toplevel_set_title( s_toplevel, title );
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constexpr EGLint eglConfigAttrib[] = {
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EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
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EGL_RED_SIZE, 8,
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EGL_GREEN_SIZE, 8,
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EGL_BLUE_SIZE, 8,
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EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
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EGL_NONE
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};
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s_eglDpy = eglGetPlatformDisplay( EGL_PLATFORM_WAYLAND_KHR, s_dpy, nullptr );
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EGLBoolean res;
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res = eglInitialize( s_eglDpy, nullptr, nullptr );
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if( res != EGL_TRUE ) { fprintf( stderr, "Cannot initialize EGL!\n" ); exit( 1 ); }
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EGLint count;
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EGLConfig eglConfig;
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res = eglChooseConfig( s_eglDpy, eglConfigAttrib, &eglConfig, 1, &count );
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if( res != EGL_TRUE || count != 1 ) { fprintf( stderr, "No suitable EGL config found!\n" ); exit( 1 ); }
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res = eglBindAPI( EGL_OPENGL_API );
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if( res != EGL_TRUE ) { fprintf( stderr, "Cannot use OpenGL through EGL!\n" ); exit( 1 ); }
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s_eglSurf = eglCreatePlatformWindowSurface( s_eglDpy, eglConfig, s_eglWin, nullptr );
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constexpr EGLint eglCtxAttrib[] = {
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EGL_CONTEXT_MAJOR_VERSION, 3,
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EGL_CONTEXT_MINOR_VERSION, 2,
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EGL_CONTEXT_OPENGL_PROFILE_MASK, EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT,
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EGL_NONE
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};
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s_eglCtx = eglCreateContext( s_eglDpy, eglConfig, EGL_NO_CONTEXT, eglCtxAttrib );
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if( !s_eglCtx ) { fprintf( stderr, "Cannot create OpenGL 3.2 Core Profile context!\n" ); exit( 1 ); }
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res = eglMakeCurrent( s_eglDpy, s_eglSurf, s_eglSurf, s_eglCtx );
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if( res != EGL_TRUE ) { fprintf( stderr, "Cannot make EGL context current!\n" ); exit( 1 ); }
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ImGui_ImplOpenGL3_Init( "#version 150" );
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ImGuiIO& io = ImGui::GetIO();
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io.BackendPlatformName = "wayland (tracy profiler)";
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s_time = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
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}
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Backend::~Backend()
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{
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eglMakeCurrent( s_eglDpy, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT );
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eglDestroySurface( s_eglDpy, s_eglSurf );
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eglDestroyContext( s_eglDpy, s_eglCtx );
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eglTerminate( s_eglDpy );
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xdg_toplevel_destroy( s_toplevel );
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xdg_surface_destroy( s_xdgSurf );
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wl_egl_window_destroy( s_eglWin );
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wl_surface_destroy( s_surf );
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xdg_wm_base_destroy( s_wm );
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wl_shm_destroy( s_shm );
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wl_compositor_destroy( s_comp );
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wl_display_disconnect( s_dpy );
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}
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void Backend::Show()
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{
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wl_surface_commit( s_surf );
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}
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void Backend::Run()
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{
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while( s_running && wl_display_dispatch( s_dpy ) != -1 )
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{
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s_redraw();
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s_mainThreadTasks->Run();
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}
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}
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void Backend::Attention()
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{
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}
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void Backend::NewFrame( int& w, int& h )
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{
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w = m_winPos.w = s_w;
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h = m_winPos.h = s_h;
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ImGuiIO& io = ImGui::GetIO();
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io.DisplaySize = ImVec2( w, h );
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io.DisplayFramebufferScale = ImVec2( 1, 1 );
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ImGui_ImplOpenGL3_NewFrame();
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uint64_t time = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
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io.DeltaTime = ( time - s_time ) / 1000000.f;
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s_time = time;
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}
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void Backend::EndFrame()
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{
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const ImVec4 clear_color = ImColor( 114, 144, 154 );
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ImGui::Render();
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glViewport( 0, 0, s_w, s_h );
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glClearColor( clear_color.x, clear_color.y, clear_color.z, clear_color.w );
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glClear( GL_COLOR_BUFFER_BIT );
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ImGui_ImplOpenGL3_RenderDrawData( ImGui::GetDrawData() );
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eglSwapBuffers( s_eglDpy, s_eglSurf );
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}
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void Backend::SetIcon( uint8_t* data, int w, int h )
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{
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}
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void Backend::SetTitle( const char* title )
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{
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xdg_toplevel_set_title( s_toplevel, title );
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}
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float Backend::GetDpiScale()
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{
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return 1.f;
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}
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