demotool/main.cc

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#include "externals.hh"
#include "imgui_impl_sdl.h"
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#include "demo.hh"
#include "globals.hh"
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#include "profiling.hh"
#include "window.hh"
#include "shaders.hh"
#include "odbg.hh"
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/*= T_Main ===================================================================*/
struct T_Main
{
static constexpr uint32_t ResizeDelay = 50;
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T_Main( );
~T_Main( );
void mainLoop( );
private:
bool done = false;
bool capture = false;
ImVec2 mouseInitial;
ImVec2 mouseMove;
uint32_t stopResize = 0;
ImVec2 prevSize;
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bool demoCtrl_ = false;
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std::unique_ptr< T_Demo > demo;
void initDemo( );
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void startIteration( );
void handleCapture( );
void makeUI( );
void render( );
};
/*----------------------------------------------------------------------------*/
T_Main::T_Main( )
{
Globals::Init( );
prevSize = ImVec2( 1280 , 720 );
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}
void T_Main::mainLoop( )
{
auto& p( Globals::Profiler( ) );
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while ( !done ) {
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if ( demo ) {
auto const& dspSize( ImGui::GetIO( ).DisplaySize );
if ( prevSize.x != dspSize.x || prevSize.y != dspSize.y ) {
stopResize = ResizeDelay;
prevSize = dspSize;
}
}
if ( stopResize > 0 ) {
stopResize --;
if ( stopResize == 0 ) {
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demo.reset( );
}
}
if ( !demo ) {
initDemo( );
}
Globals::Watcher( ).check( );
Globals::Shaders( ).update( );
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glFinish( );
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p.startFrame( );
p.start( "Full frame" );
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startIteration( );
if ( !done ) {
handleCapture( );
makeUI( );
render( );
p.end( "Full frame" );
Globals::Window( ).swap( );
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p.endFrame( );
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}
}
}
T_Main::~T_Main( )
{
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demo.reset( );
Globals::Shutdown( );
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}
/*----------------------------------------------------------------------------*/
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void T_Main::initDemo( )
{
assert( !demo );
auto const& dspSize( ImGui::GetIO( ).DisplaySize );
if ( dspSize.x < 0 || dspSize.y < 0 ) {
return;
}
printf( "init w/ dspsize %dx%d\n" , int( dspSize.x ) , int( dspSize.y ) );
demo = std::make_unique< T_Demo >( dspSize.x , dspSize.y );
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if ( demo->initialise( ) ) {
Globals::Profiler( ).clear( );
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} else {
demo.reset( );
}
}
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void T_Main::startIteration( )
{
SDL_Event event;
mouseMove = ImVec2( );
while ( SDL_PollEvent( &event ) ) {
ImGui_ImplSdl_ProcessEvent( &event );
if ( event.type == SDL_QUIT ) {
done = true;
return;
}
if ( capture && event.type == SDL_MOUSEMOTION ) {
mouseMove.x += event.motion.xrel;
mouseMove.y += event.motion.yrel;
}
}
Globals::Window( ).startFrame( capture , mouseInitial );
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ImGui::GetIO( ).MouseDrawCursor = true;
}
void T_Main::handleCapture( )
{
auto const& io( ImGui::GetIO( ) );
const bool lmb( ImGui::IsMouseDown( 0 ) );
const bool mb( lmb || ImGui::IsMouseDown( 1 ) );
const bool appCanGrab( !( ImGui::IsMouseHoveringAnyWindow( )
|| io.WantCaptureMouse
|| io.WantCaptureKeyboard ) );
const bool shift( io.KeyShift );
const bool ctrl( io.KeyCtrl );
if ( capture && !mb ) {
capture = false;
ImGui::CaptureMouseFromApp( false );
SDL_SetRelativeMouseMode( SDL_FALSE );
Globals::Window( ).warpMouse( mouseInitial );
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ImGui::SetMouseCursor( ImGuiMouseCursor_Arrow );
} else if ( capture ) {
ImGui::SetMouseCursor( ImGuiMouseCursor_Move );
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if ( demo ) {
demo->handleDND( mouseMove , ctrl , shift , lmb );
}
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} else if ( appCanGrab && mb ) {
capture = true;
mouseInitial = ImGui::GetMousePos( );
ImGui::CaptureMouseFromApp( true );
SDL_SetRelativeMouseMode( SDL_TRUE );
ImGui::SetMouseCursor( ImGuiMouseCursor_Move );
}
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if ( ( appCanGrab || capture ) && io.MouseWheel && demo ) {
demo->handleWheel( io.MouseWheel , ctrl , shift );
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}
}
void T_Main::makeUI( )
{
ImGui::SetNextWindowSize( ImVec2( 300 , 150 ) ,
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ImGuiSetCond_Once );
ImGui::SetNextWindowPos( ImVec2( ) , ImGuiSetCond_Once );
ImGui::Begin( "Tools" );
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ImGui::Checkbox( "Demo controls" , &demoCtrl_ );
ImGui::Checkbox( "Output debugger" , &Globals::ODbg( ).uiEnabled( ) );
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ImGui::Checkbox( "Profiler" , &Globals::Profiler( ).uiEnabled( ) );
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ImGui::Checkbox( "Shaders" , &Globals::Shaders( ).uiEnabled( ) );
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if ( demo ) {
ImGui::Separator( );
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auto& sync( Globals::Sync( ) );
const float duration( sync.duration( ) );
float time( sync.time( ) );
if ( ImGui::SliderFloat( "" , &time , 0 , duration , "%.1fs" ) ) {
sync.setTime( time );
demo->playing = demo->playing && ! sync.finished( );
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}
ImGui::SameLine( );
if ( ImGui::Button( demo->playing ? "Stop" : "Play" ) ) {
demo->playing = !demo->playing;
}
}
ImGui::End( );
if ( demo && demoCtrl_ ) {
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demo->makeUI( );
}
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Globals::Profiler( ).makeUI( );
Globals::ODbg( ).makeUI( );
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Globals::Shaders( ).makeUI( );
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}
void T_Main::render( )
{
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if ( demo ) {
Globals::Profiler( ).start( "Render" );
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demo->render( );
glFinish( ); Globals::Profiler( ).end( "Render" );
Globals::Profiler( ).start( "Debug" );
T_Rendertarget::MainOutput( );
if ( Globals::ODbg( ).isActive( ) ) {
Globals::ODbg( ).debugOutput( );
}
glFinish( ); Globals::Profiler( ).end( "Debug" );
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} else {
T_Rendertarget::MainOutput( );
glClearColor( 0 , 0 , 0 , 1 );
glClear( GL_COLOR_BUFFER_BIT );
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}
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glUseProgram( 0 );
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glBindProgramPipeline( 0 );
Globals::Textures( ).reset( );
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glClearColor( 0 , 0 , 0 , 1 );
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ImGui::Render( );
}
/*============================================================================*/
int main( int , char** )
{
T_Main m;
m.mainLoop( );
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return 0;
}