SdlSandbox/sdl1/colorGenerator/main.cpp

#include <cstdlib>
#include <SDL.h>
#include "Input.h"
#include "SDL_gfxPrimitives.h"

int main ( int argc, char** argv )
{
    // initialize SDL video
    if ( SDL_Init( SDL_INIT_VIDEO ) < 0 )
    {
        printf( "Unable to init SDL: %s\n", SDL_GetError() );
        return 1;
    }

    // make sure SDL cleans up before exit
    atexit(SDL_Quit);

    // create a new window
    Uint16 w(1440), h(900);
    SDL_Surface* screen = SDL_SetVideoMode(w, h, 32,
                                           SDL_HWSURFACE|SDL_DOUBLEBUF|SDL_FULLSCREEN);
    if ( !screen )
    {
        printf("Unable to set video: %s\n", SDL_GetError());
        return 1;
    }

    // variables
    SDL_Rect dstrect;
    const Uint32 delay(18);
    Uint32 tps( SDL_GetTicks() ), tps_old(0);

    // graph
    int i(0);
    int r(128), g(128), b(128);
    bool ubr(false), ubg(false), ubb(false);
    bool dbr(false), dbg(false), dbb(false);

    // program main loop
    bool done = false;
    while (!done)
    {
        // message processing loop
        SDL_Event event;
        while (SDL_PollEvent(&event))
        {
            // check for messages
            switch (event.type)
            {
                // exit if the window is closed
            case SDL_QUIT:
                done = true;
                break;

                // check for keypresses
            case SDL_KEYDOWN:
                // exit if ESCAPE is pressed
                switch ( event.key.keysym.sym )
                {
                case SDLK_ESCAPE:
                    done = true;
                    break;
                case SDLK_KP7:
                    ubr = true;
                    dbr = false;
                    break;
                case SDLK_KP1:
                    ubr = false;
                    dbr = true;
                    break;
                case SDLK_KP8:
                    ubg = true;
                    dbg = false;
                    break;
                case SDLK_KP2:
                    ubg = false;
                    dbg = true;
                    break;
                case SDLK_KP9:
                    ubb = true;
                    dbb = false;
                    break;
                case SDLK_KP3:
                    ubb = false;
                    dbb = true;
                    break;
                default:
                    break;
                }
                break;

            case SDL_KEYUP:
                switch ( event.key.keysym.sym )
                {
                case SDLK_KP7:
                    ubr = false;
                    dbr = false;
                    break;
                case SDLK_KP1:
                    ubr = false;
                    dbr = false;
                    break;
                case SDLK_KP8:
                    ubg = false;
                    dbg = false;
                    break;
                case SDLK_KP2:
                    ubg = false;
                    dbg = false;
                    break;
                case SDLK_KP9:
                    ubb = false;
                    dbb = false;
                    break;
                case SDLK_KP3:
                    ubb = false;
                    dbb = false;
                    break;
                default:
                    break;
                }
                break;

            } // end switch event tye
        } // end of message processing

        if ( r < 255 && ubr ) r++;
        if ( r > 0 && dbr ) r--;
        if ( g < 255 && ubg ) g++;
        if ( g > 0 && dbg ) g--;
        if ( b < 255 && ubb ) b++;
        if ( b > 0 && dbb ) b--;

        // calculs
        i++;
        if ( i > w ) i = 0;

        // DRAWING STARTS HERE
        vlineRGBA(screen, i, 0, h, r/2, g/2, b/2, 255);
        roundedBoxRGBA(screen, 15, 15, w-15, h-400, 15, r, g, b, 255);

        for ( int j(1); j<=3; j++ )
        {
            filledCircleRGBA(screen, j*w/4, h-200, 149, 128, 128, 128, 255);
        }

        filledPieRGBA(screen, w/4, h-200, 150, 0, r*359/255, 255, 0, 0, 255 );
        filledPieRGBA(screen, w/2, h-200, 150, 0, g*359/255, 0, 255, 0, 255 );
        filledPieRGBA(screen, 3*w/4, h-200, 150, 0, b*359/255, 0, 0, 255, 255 );

        stringRGBA(screen, w/4+140, h-130, "Rouge", 255, 0, 0, 255);
        stringRGBA(screen, w/2+140, h-130, "Vert", 0, 255, 0, 255);
        stringRGBA(screen, 3*w/4+140, h-130, "Bleu", 0, 0, 255, 255);

        // DRAWING ENDS HERE

        // finally, update the screen :)
        SDL_Flip(screen);

        // time management
        do
        {
            tps = SDL_GetTicks();
        } while ( tps-tps_old < delay );
        tps_old = tps;
    } // end main loop

    // all is well ;)
    printf("Exited cleanly\n");
    return 0;
}