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////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Graphics.hpp>
#include <map>
void DisplayError();
////////////////////////////////////////////////////////////
/// Entry point of application
///
/// \return Application exit code
///
////////////////////////////////////////////////////////////
int main()
{
// Check that the system can use post effects
if (sf::PostFX::CanUsePostFX() == false)
{
DisplayError();
return EXIT_SUCCESS;
}
// Create the main window
sf::RenderWindow App(sf::VideoMode(800, 600), "SFML PostFX");
// Load a cute background image to display :)
sf::Image BackgroundImage;
if (!BackgroundImage.LoadFromFile("datas/post-fx/background.jpg"))
return EXIT_FAILURE;
sf::Sprite Background(BackgroundImage);
// Load the text font
sf::Font Cheeseburger;
if (!Cheeseburger.LoadFromFile("datas/post-fx/cheeseburger.ttf"))
return EXIT_FAILURE;
// Load the image needed for the wave effect
sf::Image WaveImage;
if (!WaveImage.LoadFromFile("datas/post-fx/wave.jpg"))
return EXIT_FAILURE;
// Load all effects
std::map<std::string, sf::PostFX> Effects;
if (!Effects["nothing"].LoadFromFile("datas/post-fx/nothing.sfx")) return EXIT_FAILURE;
if (!Effects["blur"].LoadFromFile("datas/post-fx/blur.sfx")) return EXIT_FAILURE;
if (!Effects["colorize"].LoadFromFile("datas/post-fx/colorize.sfx")) return EXIT_FAILURE;
if (!Effects["fisheye"].LoadFromFile("datas/post-fx/fisheye.sfx")) return EXIT_FAILURE;
if (!Effects["wave"].LoadFromFile("datas/post-fx/wave.sfx")) return EXIT_FAILURE;
std::map<std::string, sf::PostFX>::iterator CurrentEffect = Effects.find("nothing");
// Do specific initializations
Effects["nothing"].SetTexture("framebuffer", NULL);
Effects["blur"].SetTexture("framebuffer", NULL);
Effects["blur"].SetParameter("offset", 0.f);
Effects["colorize"].SetTexture("framebuffer", NULL);
Effects["colorize"].SetParameter("color", 1.f, 1.f, 1.f);
Effects["fisheye"].SetTexture("framebuffer", NULL);
Effects["wave"].SetTexture("framebuffer", NULL);
Effects["wave"].SetTexture("wave", &WaveImage);
// Define a string for displaying current effect description
sf::String CurFXStr;
CurFXStr.SetText("Current effect is \"" + CurrentEffect->first + "\"");
CurFXStr.SetFont(Cheeseburger);
CurFXStr.SetPosition(20.f, 0.f);
// Define a string for displaying help
sf::String InfoStr;
InfoStr.SetText("Move your mouse to change the effect parameters\nPress numpad + and - to change effect\nWarning : some effects may not work\ndepending on your graphics card");
InfoStr.SetFont(Cheeseburger);
InfoStr.SetPosition(20.f, 460.f);
InfoStr.SetColor(sf::Color(200, 100, 150));
// Start the game loop
while (App.IsOpened())
{
// Process events
sf::Event Event;
while (App.GetEvent(Event))
{
// Close window : exit
if (Event.Type == sf::Event::Closed)
App.Close();
if (Event.Type == sf::Event::KeyPressed)
{
// Escape key : exit
if (Event.Key.Code == sf::Key::Escape)
App.Close();
// Add key : next effect
if (Event.Key.Code == sf::Key::Add)
{
CurrentEffect++;
if (CurrentEffect == Effects.end())
CurrentEffect = Effects.begin();
CurFXStr.SetText("Current effect is \"" + CurrentEffect->first + "\"");
}
// Subtract key : previous effect
if (Event.Key.Code == sf::Key::Subtract)
{
if (CurrentEffect == Effects.begin())
CurrentEffect = Effects.end();
CurrentEffect--;
CurFXStr.SetText("Current effect is \"" + CurrentEffect->first + "\"");
}
}
}
// Get the mouse position in the range [0, 1]
float X = App.GetInput().GetMouseX() / static_cast<float>(App.GetWidth());
float Y = App.GetInput().GetMouseY() / static_cast<float>(App.GetHeight());
// Update the current effect
if (CurrentEffect->first == "blur") CurrentEffect->second.SetParameter("offset", X * Y * 0.1f);
else if (CurrentEffect->first == "colorize") CurrentEffect->second.SetParameter("color", 0.3f, X, Y);
else if (CurrentEffect->first == "fisheye") CurrentEffect->second.SetParameter("mouse", X, 1.f - Y);
else if (CurrentEffect->first == "wave") CurrentEffect->second.SetParameter("offset", X, Y);
// Clear the window
App.Clear();
// Draw background and apply the post-fx
App.Draw(Background);
App.Draw(CurrentEffect->second);
// Draw interface strings
App.Draw(CurFXStr);
App.Draw(InfoStr);
// Finally, display the rendered frame on screen
App.Display();
}
return EXIT_SUCCESS;
}
////////////////////////////////////////////////////////////
/// Fonction called when the post-effects are not supported ;
/// Display an error message and wait until the user exits
///
////////////////////////////////////////////////////////////
void DisplayError()
{
// Create the main window
sf::RenderWindow App(sf::VideoMode(800, 600), "SFML PostFX");
// Define a string for displaying the error message
sf::String ErrorStr("Sorry, your system doesn't support post-effects");
ErrorStr.SetPosition(100.f, 250.f);
ErrorStr.SetColor(sf::Color(200, 100, 150));
// Start the game loop
bool Running = true;
while (Running)
{
// Process events
sf::Event Event;
while (App.GetEvent(Event))
{
// Close window : exit
if (Event.Type == sf::Event::Closed)
Running = false;
// Escape key : exit
if ((Event.Type == sf::Event::KeyPressed) && (Event.Key.Code == sf::Key::Escape))
Running = false;
}
// Clear the window
App.Clear();
// Draw the error message
App.Draw(ErrorStr);
// Finally, display the rendered frame on screen
App.Display();
}
}
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