fgcolor.cpp

/*
    Shows using of FGColor class
*/

#include <fastgl/fastgl.h>
#include <fastgl/widgets.h>

void DrawGradient(fgl::FGWindow& dc, int x, int y,
                 fgl::FGColor c1, fgl::FGColor c2, int width, int height)
{
  assert(width > 0);

  float dh = (c2.GetHue() - c1.GetHue()) / width;
  float dl = (c2.GetLuminance() - c1.GetLuminance()) / width;
  float ds = (c2.GetSaturation() - c1.GetSaturation()) / width;

  for (int i = 0; i < width; ++i)
  {
    dc.WindowLine(x + i, y,x + i, y + height, c1);
    c1.SetHue(c1.GetHue() + dh);
    c1.SetLuminance(c1.GetLuminance() + dl);
    c1.SetSaturation(c1.GetSaturation() + ds);
  }
}

void DrawGradients(void)
{
    fgl::FGColor Black;
    fgl::FGColor Gray25 = fgl::FGColor(64,64,64);
    fgl::FGColor Gray50 = fgl::FGColor(128,128,128);
    fgl::FGColor Gray75 = fgl::FGColor(192,192,192);
    fgl::FGColor White = fgl::FGColor::white;

    fill_box( 50,  50, 100,100, Black, fgl::_GSET);
    fill_box( 150, 50, 100,100, Gray25, fgl::_GSET);
    fill_box( 250, 50, 100,100, Gray50, fgl::_GSET);
    fill_box( 350, 50, 100,100, Gray75, fgl::_GSET);
    fill_box( 450, 50, 100,100, White, fgl::_GSET);

    fgl::FGColor Coral(FGColor::blue);

    for(int i=0; i<16; i++)
    {
        fill_box( 50+i*32,  150, 100,80, Black, fgl::_GSET);
        fill_box( 50+i*32,  250, 100,80, Coral, fgl::_GSET);
        Black.Lighter(1.3);
        Coral.Darker(1.1);
    }

    DrawGradient( *fgl::FGApp::GetRootWindow(), 0,350, fgl::FGColor(fgl::FGColor::black), fgl::FGColor(fgl::FGColor::white), 1024, 10);
    DrawGradient( *fgl::FGApp::GetRootWindow(), 0,360, fgl::FGColor(fgl::FGColor::black), fgl::FGColor(fgl::FGColor::red), 1024, 10);
    DrawGradient( *fgl::FGApp::GetRootWindow(), 0,370, fgl::FGColor(fgl::FGColor::black), fgl::FGColor(fgl::FGColor::green), 1024, 10);
    DrawGradient( *fgl::FGApp::GetRootWindow(), 0,380, fgl::FGColor(fgl::FGColor::black), fgl::FGColor(fgl::FGColor::blue), 1024, 10);
    DrawGradient( *fgl::FGApp::GetRootWindow(), 0,390, fgl::FGColor(fgl::FGColor::black), fgl::FGColor(fgl::FGColor::yellow), 1024, 10);

    for(int i=0; i<360; i++)
    {
        fgl::FGColor c((unsigned)0);
        c.SetHLS(i, 0.5, 1.);
        fill_box( 0,  i+400, 1024, 1, c, _GSET);
    }

}

void DrawImages(void)
{
    int i;
    fgl::FGBitmap image("../data/mountains.jpg");
    fgl::FGBitmap image2("../data/mountains.jpg");
    fgl::FGBitmap image3("../data/mountains.jpg");
    fgl::FGBitmap image4("../data/mountains.jpg");

    fgl::FGPixel* bmp = image2.GetArray();

    for(i=400*300; i; i--)
    {
        fgl::FGColor cc(*bmp);
        cc.Desaturate();
        *bmp = cc;
        bmp++;
    }
    bmp = image3.GetArray();

    for(i=400*300; i; i--)
    {
        fgl::FGColor cc(*bmp);
        cc.Darker(1.5);
        *bmp = cc;
        bmp++;
    }
    bmp = image4.GetArray();

    for(i=400*300; i; i--)
    {
        fgl::FGColor cc(*bmp);
        cc.Lighter(1.5);
        *bmp = cc;
        bmp++;
    }
    fgl::FGApp::GetRootWindow()->WindowPutBitmap(50,30,0,0,400,300,&image);
    fgl::FGApp::GetRootWindow()->WindowPutBitmap(500,30,0,0,400,300,&image2);
    fgl::FGApp::GetRootWindow()->WindowPutBitmap(50,430,0,0,400,300,&image3);
    fgl::FGApp::GetRootWindow()->WindowPutBitmap(500,430,0,0,400,300,&image4);
}

void DrawColors(void)
{
    const int w = fgl::FGApp::GetRootWindow()->GetW() / 14;
    const int h = fgl::FGApp::GetRootWindow()->GetH() / 10;
    fgl::FGApp::GetRootWindow()->set_font(0);

    for (int i = 0; i<14; i++)
    {
      for (int j = 0;j<10; j++)
      {
        fgl::FGColor color(fgl::FGColor::GetColorFromIndex(j + i * 10));
        int x = i * w;
        int y = j * h;
        if (fgl::FGColor::GetNameFromIndex(j + i * 10))
        {
            fgl::FGApp::GetRootWindow()->WindowBox(x, y, w, h, color);
            fgl::FGApp::GetRootWindow()->WindowText(x+8, y+8, FGColor::GetNameFromIndex(j + i * 10));
        }
      }
    }
}

int main(int argc, char **argv)
{
    fgl::FGApp app(fgl::G1024x768, argc, argv, fgl::CDARK, fgl::APP_ENABLEALTX | fgl::APP_ROOTWINDOW);

    DrawGradients();

    fgl::FGDialog message("Click OK to continue ...");
    message.ShowOk();

    DrawImages();
    message.ShowOk();

    DrawColors();
    message.ShowOk();

    fgl::FGColor test_color(fgl::FGColor::blue);
    fgl::FGColorPicker picker(&test_color);
    message.ShowOk();

    return 0;
}

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