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tracy/profiler/src/BackendEmscripten.cpp
Bartosz Taudul 8b9da2efba
Add support for setting mouse cursor on emscripten.
2024-09-20 23:30:21 +02:00

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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include <GLES2/gl2.h>
#include <emscripten/html5.h>
#include "imgui/imgui_impl_opengl3.h"
#include "Backend.hpp"
#include "RunQueue.hpp"
#include "profiler/TracyImGui.hpp"
static std::function<void()> s_redraw;
static std::function<void(float)> s_scaleChanged;
static std::function<int(void)> s_isBusy;
static RunQueue* s_mainThreadTasks;
static EGLDisplay s_eglDpy;
static EGLContext s_eglCtx;
static EGLSurface s_eglSurf;
static float s_prevScale;
static int s_width, s_height;
static uint64_t s_time;
static const char* s_prevCursor = nullptr;
static ImGuiKey TranslateKeyCode( const char* code )
{
if( strcmp( code, "Backquote" ) == 0 ) return ImGuiKey_GraveAccent;
if( strcmp( code, "Backslash" ) == 0 ) return ImGuiKey_Backslash;
if( strcmp( code, "BracketLeft" ) == 0 ) return ImGuiKey_LeftBracket;
if( strcmp( code, "BracketRight" ) == 0 ) return ImGuiKey_RightBracket;
if( strcmp( code, "Comma" ) == 0 ) return ImGuiKey_Comma;
if( strcmp( code, "Digit0" ) == 0 ) return ImGuiKey_0;
if( strcmp( code, "Digit1" ) == 0 ) return ImGuiKey_1;
if( strcmp( code, "Digit2" ) == 0 ) return ImGuiKey_2;
if( strcmp( code, "Digit3" ) == 0 ) return ImGuiKey_3;
if( strcmp( code, "Digit4" ) == 0 ) return ImGuiKey_4;
if( strcmp( code, "Digit5" ) == 0 ) return ImGuiKey_5;
if( strcmp( code, "Digit6" ) == 0 ) return ImGuiKey_6;
if( strcmp( code, "Digit7" ) == 0 ) return ImGuiKey_7;
if( strcmp( code, "Digit8" ) == 0 ) return ImGuiKey_8;
if( strcmp( code, "Digit9" ) == 0 ) return ImGuiKey_9;
if( strcmp( code, "Equal" ) == 0 ) return ImGuiKey_Equal;
if( strcmp( code, "IntlBackslash" ) == 0 ) return ImGuiKey_Backslash;
if( strcmp( code, "IntlRo" ) == 0 ) return ImGuiKey_Backslash;
if( strcmp( code, "IntlYen" ) == 0 ) return ImGuiKey_Backslash;
if( strcmp( code, "KeyA" ) == 0 ) return ImGuiKey_A;
if( strcmp( code, "KeyB" ) == 0 ) return ImGuiKey_B;
if( strcmp( code, "KeyC" ) == 0 ) return ImGuiKey_C;
if( strcmp( code, "KeyD" ) == 0 ) return ImGuiKey_D;
if( strcmp( code, "KeyE" ) == 0 ) return ImGuiKey_E;
if( strcmp( code, "KeyF" ) == 0 ) return ImGuiKey_F;
if( strcmp( code, "KeyG" ) == 0 ) return ImGuiKey_G;
if( strcmp( code, "KeyH" ) == 0 ) return ImGuiKey_H;
if( strcmp( code, "KeyI" ) == 0 ) return ImGuiKey_I;
if( strcmp( code, "KeyJ" ) == 0 ) return ImGuiKey_J;
if( strcmp( code, "KeyK" ) == 0 ) return ImGuiKey_K;
if( strcmp( code, "KeyL" ) == 0 ) return ImGuiKey_L;
if( strcmp( code, "KeyM" ) == 0 ) return ImGuiKey_M;
if( strcmp( code, "KeyN" ) == 0 ) return ImGuiKey_N;
if( strcmp( code, "KeyO" ) == 0 ) return ImGuiKey_O;
if( strcmp( code, "KeyP" ) == 0 ) return ImGuiKey_P;
if( strcmp( code, "KeyQ" ) == 0 ) return ImGuiKey_Q;
if( strcmp( code, "KeyR" ) == 0 ) return ImGuiKey_R;
if( strcmp( code, "KeyS" ) == 0 ) return ImGuiKey_S;
if( strcmp( code, "KeyT" ) == 0 ) return ImGuiKey_T;
if( strcmp( code, "KeyU" ) == 0 ) return ImGuiKey_U;
if( strcmp( code, "KeyV" ) == 0 ) return ImGuiKey_V;
if( strcmp( code, "KeyW" ) == 0 ) return ImGuiKey_W;
if( strcmp( code, "KeyX" ) == 0 ) return ImGuiKey_X;
if( strcmp( code, "KeyY" ) == 0 ) return ImGuiKey_Y;
if( strcmp( code, "KeyZ" ) == 0 ) return ImGuiKey_Z;
if( strcmp( code, "Minus" ) == 0 ) return ImGuiKey_Minus;
if( strcmp( code, "Period" ) == 0 ) return ImGuiKey_Period;
if( strcmp( code, "Quote" ) == 0 ) return ImGuiKey_Apostrophe;
if( strcmp( code, "Semicolon" ) == 0 ) return ImGuiKey_Semicolon;
if( strcmp( code, "Slash" ) == 0 ) return ImGuiKey_Slash;
if( strcmp( code, "AltLeft" ) == 0 ) return ImGuiKey_LeftAlt;
if( strcmp( code, "AltRight" ) == 0 ) return ImGuiKey_RightAlt;
if( strcmp( code, "Backspace" ) == 0 ) return ImGuiKey_Backspace;
if( strcmp( code, "CapsLock" ) == 0 ) return ImGuiKey_CapsLock;
if( strcmp( code, "ContextMenu" ) == 0 ) return ImGuiKey_Menu;
if( strcmp( code, "ControlLeft" ) == 0 ) return ImGuiKey_LeftCtrl;
if( strcmp( code, "ControlRight" ) == 0 ) return ImGuiKey_RightCtrl;
if( strcmp( code, "Enter" ) == 0 ) return ImGuiKey_Enter;
if( strcmp( code, "MetaLeft" ) == 0 ) return ImGuiKey_LeftSuper;
if( strcmp( code, "MetaRight" ) == 0 ) return ImGuiKey_RightSuper;
if( strcmp( code, "ShiftLeft" ) == 0 ) return ImGuiKey_LeftShift;
if( strcmp( code, "ShiftRight" ) == 0 ) return ImGuiKey_RightShift;
if( strcmp( code, "Space" ) == 0 ) return ImGuiKey_Space;
if( strcmp( code, "Tab" ) == 0 ) return ImGuiKey_Tab;
if( strcmp( code, "Delete" ) == 0 ) return ImGuiKey_Delete;
if( strcmp( code, "End" ) == 0 ) return ImGuiKey_End;
if( strcmp( code, "Home" ) == 0 ) return ImGuiKey_Home;
if( strcmp( code, "Insert" ) == 0 ) return ImGuiKey_Insert;
if( strcmp( code, "PageDown" ) == 0 ) return ImGuiKey_PageDown;
if( strcmp( code, "PageUp" ) == 0 ) return ImGuiKey_PageUp;
if( strcmp( code, "ArrowDown" ) == 0 ) return ImGuiKey_DownArrow;
if( strcmp( code, "ArrowLeft" ) == 0 ) return ImGuiKey_LeftArrow;
if( strcmp( code, "ArrowRight" ) == 0 ) return ImGuiKey_RightArrow;
if( strcmp( code, "ArrowUp" ) == 0 ) return ImGuiKey_UpArrow;
if( strcmp( code, "NumLock" ) == 0 ) return ImGuiKey_NumLock;
if( strcmp( code, "Numpad0" ) == 0 ) return ImGuiKey_Keypad0;
if( strcmp( code, "Numpad1" ) == 0 ) return ImGuiKey_Keypad1;
if( strcmp( code, "Numpad2" ) == 0 ) return ImGuiKey_Keypad2;
if( strcmp( code, "Numpad3" ) == 0 ) return ImGuiKey_Keypad3;
if( strcmp( code, "Numpad4" ) == 0 ) return ImGuiKey_Keypad4;
if( strcmp( code, "Numpad5" ) == 0 ) return ImGuiKey_Keypad5;
if( strcmp( code, "Numpad6" ) == 0 ) return ImGuiKey_Keypad6;
if( strcmp( code, "Numpad7" ) == 0 ) return ImGuiKey_Keypad7;
if( strcmp( code, "Numpad8" ) == 0 ) return ImGuiKey_Keypad8;
if( strcmp( code, "Numpad9" ) == 0 ) return ImGuiKey_Keypad9;
if( strcmp( code, "NumpadAdd" ) == 0 ) return ImGuiKey_KeypadAdd;
if( strcmp( code, "NumpadBackspace" ) == 0 ) return ImGuiKey_Backspace;
if( strcmp( code, "NumpadComma" ) == 0 ) return ImGuiKey_KeypadDecimal;
if( strcmp( code, "NumpadDecimal" ) == 0 ) return ImGuiKey_KeypadDecimal;
if( strcmp( code, "NumpadDivide" ) == 0 ) return ImGuiKey_KeypadDivide;
if( strcmp( code, "NumpadEnter" ) == 0 ) return ImGuiKey_KeypadEnter;
if( strcmp( code, "NumpadEqual" ) == 0 ) return ImGuiKey_KeypadEqual;
if( strcmp( code, "NumpadMultiply" ) == 0 ) return ImGuiKey_KeypadMultiply;
if( strcmp( code, "NumpadSubtract" ) == 0 ) return ImGuiKey_KeypadSubtract;
if( strcmp( code, "Escape" ) == 0 ) return ImGuiKey_Escape;
if( strcmp( code, "F1" ) == 0 ) return ImGuiKey_F1;
if( strcmp( code, "F2" ) == 0 ) return ImGuiKey_F2;
if( strcmp( code, "F3" ) == 0 ) return ImGuiKey_F3;
if( strcmp( code, "F4" ) == 0 ) return ImGuiKey_F4;
if( strcmp( code, "F5" ) == 0 ) return ImGuiKey_F5;
if( strcmp( code, "F6" ) == 0 ) return ImGuiKey_F6;
if( strcmp( code, "F7" ) == 0 ) return ImGuiKey_F7;
if( strcmp( code, "F8" ) == 0 ) return ImGuiKey_F8;
if( strcmp( code, "F9" ) == 0 ) return ImGuiKey_F9;
if( strcmp( code, "F10" ) == 0 ) return ImGuiKey_F10;
// F11 is browser fullscreen, F12 is browser dev tools, omitting them
if( strcmp( code, "ScrollLock" ) == 0 ) return ImGuiKey_ScrollLock;
if( strcmp( code, "Pause" ) == 0 ) return ImGuiKey_Pause;
return ImGuiKey_None;
}
Backend::Backend( const char* title, const std::function<void()>& redraw, const std::function<void(float)>& scaleChanged, const std::function<int(void)>& isBusy, RunQueue* mainThreadTasks )
{
constexpr EGLint eglConfigAttrib[] = {
EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
EGL_RED_SIZE, 8,
EGL_GREEN_SIZE, 8,
EGL_BLUE_SIZE, 8,
EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
EGL_NONE
};
s_eglDpy = eglGetDisplay( EGL_DEFAULT_DISPLAY );
EGLBoolean res;
res = eglInitialize( s_eglDpy, nullptr, nullptr );
if( res != EGL_TRUE ) { fprintf( stderr, "Cannot initialize EGL!\n" ); exit( 1 ); }
EGLint count;
EGLConfig eglConfig;
res = eglChooseConfig( s_eglDpy, eglConfigAttrib, &eglConfig, 1, &count );
if( res != EGL_TRUE || count != 1 ) { fprintf( stderr, "No suitable EGL config found!\n" ); exit( 1 ); }
s_eglSurf = eglCreateWindowSurface( s_eglDpy, eglConfig, 0, nullptr );
constexpr EGLint eglCtxAttrib[] = {
EGL_CONTEXT_CLIENT_VERSION, 2,
EGL_NONE
};
s_eglCtx = eglCreateContext( s_eglDpy, eglConfig, EGL_NO_CONTEXT, eglCtxAttrib );
if( !s_eglCtx ) { fprintf( stderr, "Cannot create OpenGL 3.2 Core Profile context!\n" ); exit( 1 ); }
res = eglMakeCurrent( s_eglDpy, s_eglSurf, s_eglSurf, s_eglCtx );
if( res != EGL_TRUE ) { fprintf( stderr, "Cannot make EGL context current!\n" ); exit( 1 ); }
ImGui_ImplOpenGL3_Init( "#version 100" );
EM_ASM( document.title = UTF8ToString($0), title );
s_redraw = redraw;
s_scaleChanged = scaleChanged;
s_isBusy = isBusy;
s_mainThreadTasks = mainThreadTasks;
ImGuiIO& io = ImGui::GetIO();
io.BackendPlatformName = "wasm (tracy profiler)";
emscripten_set_mousedown_callback( "#canvas", nullptr, EM_TRUE, []( int, const EmscriptenMouseEvent* e, void* ) -> EM_BOOL {
ImGui::GetIO().AddMouseButtonEvent( e->button == 0 ? 0 : 3 - e->button, true );
tracy::s_wasActive = true;
return EM_TRUE;
} );
emscripten_set_mouseup_callback( "#canvas", nullptr, EM_TRUE, []( int, const EmscriptenMouseEvent* e, void* ) -> EM_BOOL {
ImGui::GetIO().AddMouseButtonEvent( e->button == 0 ? 0 : 3 - e->button, false );
tracy::s_wasActive = true;
return EM_TRUE;
} );
emscripten_set_mousemove_callback( "#canvas", nullptr, EM_TRUE, []( int, const EmscriptenMouseEvent* e, void* ) -> EM_BOOL {
const auto scale = EM_ASM_DOUBLE( { return window.devicePixelRatio; } );
ImGui::GetIO().AddMousePosEvent( e->targetX * scale, e->targetY * scale );
tracy::s_wasActive = true;
return EM_TRUE;
} );
emscripten_set_wheel_callback( "#canvas", nullptr, EM_TRUE, []( int, const EmscriptenWheelEvent* e, void* ) -> EM_BOOL {
ImGui::GetIO().AddMouseWheelEvent( e->deltaX * -0.05, e->deltaY * -0.05 );
tracy::s_wasActive = true;
return EM_TRUE;
} );
emscripten_set_keydown_callback( EMSCRIPTEN_EVENT_TARGET_WINDOW, nullptr, EM_TRUE, [] ( int, const EmscriptenKeyboardEvent* e, void* ) -> EM_BOOL {
const auto code = TranslateKeyCode( e->code );
if( code == ImGuiKey_None ) return EM_FALSE;
ImGui::GetIO().AddKeyEvent( code, true );
if( e->key[0] && !e->key[1] ) ImGui::GetIO().AddInputCharacter( *e->key );
return EM_TRUE;
} );
emscripten_set_keyup_callback( EMSCRIPTEN_EVENT_TARGET_WINDOW, nullptr, EM_TRUE, [] ( int, const EmscriptenKeyboardEvent* e, void* ) -> EM_BOOL {
const auto code = TranslateKeyCode( e->code );
if( code == ImGuiKey_None ) return EM_FALSE;
ImGui::GetIO().AddKeyEvent( code, false );
return EM_TRUE;
} );
s_prevScale = GetDpiScale();
s_time = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
}
Backend::~Backend()
{
}
void Backend::Show()
{
}
void Backend::Run()
{
emscripten_set_main_loop( []() {
s_redraw();
s_mainThreadTasks->Run();
}, 0, 1 );
}
void Backend::Attention()
{
}
void Backend::NewFrame( int& w, int& h )
{
const auto scale = GetDpiScale();
if( scale != s_prevScale )
{
s_prevScale = scale;
s_scaleChanged( scale );
}
w = EM_ASM_INT( { return window.innerWidth; } ) * scale;
h = EM_ASM_INT( { return window.innerHeight; } ) * scale;
if( s_width != w || s_height != h )
{
EM_ASM( Module.canvas.style.width = window.innerWidth + 'px'; Module.canvas.style.height = window.innerHeight + 'px' );
EM_ASM( Module.canvas.width = $0; Module.canvas.height = $1, w, h );
s_width = w;
s_height = h;
glViewport( 0, 0, s_width, s_height );
tracy::s_wasActive = true;
}
ImGuiIO& io = ImGui::GetIO();
io.DisplaySize = ImVec2( w, h );
io.DisplayFramebufferScale = ImVec2( 1, 1 );
ImGui_ImplOpenGL3_NewFrame();
ImGuiMouseCursor cursor = ImGui::GetMouseCursor();
const char* cursorName;
switch( cursor )
{
case ImGuiMouseCursor_None: cursorName = "none"; break;
case ImGuiMouseCursor_Arrow:
switch( s_isBusy() )
{
default:
case 0: cursorName = "default"; break;
case 1: cursorName = "progress"; break;
case 2: cursorName = "wait"; break;
}
break;
case ImGuiMouseCursor_TextInput: cursorName = "text"; break;
case ImGuiMouseCursor_ResizeAll: cursorName = "move"; break;
case ImGuiMouseCursor_ResizeNS: cursorName = "ns-resize"; break;
case ImGuiMouseCursor_ResizeEW: cursorName = "ew-resize"; break;
case ImGuiMouseCursor_ResizeNESW: cursorName = "nesw-resize"; break;
case ImGuiMouseCursor_ResizeNWSE: cursorName = "nwse-resize"; break;
case ImGuiMouseCursor_Hand: cursorName = "pointer"; break;
case ImGuiMouseCursor_NotAllowed: cursorName = "not-allowed"; break;
default: cursorName = "auto"; break;
};
if( s_prevCursor != cursorName )
{
s_prevCursor = cursorName;
EM_ASM_INT( { document.getElementById('canvas').style.cursor = UTF8ToString($0); }, cursorName );
}
uint64_t time = std::chrono::duration_cast<std::chrono::microseconds>( std::chrono::high_resolution_clock::now().time_since_epoch() ).count();
io.DeltaTime = std::min( 0.1f, ( time - s_time ) / 1000000.f );
s_time = time;
}
void Backend::EndFrame()
{
const ImVec4 clear_color = ImColor( 20, 20, 17 );
ImGui::Render();
glClearColor( clear_color.x, clear_color.y, clear_color.z, clear_color.w );
glClear( GL_COLOR_BUFFER_BIT );
ImGui_ImplOpenGL3_RenderDrawData( ImGui::GetDrawData() );
}
void Backend::SetIcon( uint8_t* data, int w, int h )
{
}
void Backend::SetTitle( const char* title )
{
EM_ASM( document.title = UTF8ToString($0), title );
}
float Backend::GetDpiScale()
{
return EM_ASM_DOUBLE( { return window.devicePixelRatio; } );
}
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