{

ZL_Surface srfBuffer;

void Load(int argc, char *argv[])

{

ZL_Display::Init("Render To Texture", 854, 480);

ZL_Input::Init();

srfBuffer = ZL_Surface(256, 256); //initialize a 256x256 render target texture

srfBuffer.RenderToBegin(); //start drawing onto the render target texture

ZL_Display::ClearFill(ZL_Color::Red); //clear the texture to fully red

ZL_Surface srfLogo("Data/ZILLALIB.png"); //load another surface texture

srfLogo.DrawTo( 10.0f, 10.0f, 90.0f, 90.0f); //draw the newly loaded surface texture into the buffer

srfLogo.DrawTo( 70.0f, 70.0f, 150.0f, 150.0f); //again

srfLogo.DrawTo(130.0f, 130.0f, 210.0f, 210.0f); //again

srfBuffer.RenderToEnd(); //end drawing to the texture

}

void AfterFrame()

{

ZL_Vector SurfacePosition(299.0f, 112.0f);

if (ZL_Input::Held())

{

//Draw into the buffer while the mouse is pressed, draw in 1 pixel steps from the old mouse position to the current position

ZL_Vector MousePosInImage = ZL_Input::Pointer() - SurfacePosition, MouseMoveDir = ZL_Input::PointerDelta().VecNorm();

scalar MouseMoveTotal = (ZL_Input::Down() ? 0.0f : ZL_Math::Max(ZL_Input::PointerDelta().GetLength() - 1.0f, 0.0f));

srfBuffer.RenderToBegin();

for (scalar i = 0; i <= MouseMoveTotal; i++)

ZL_Display::FillCircle(MousePosInImage - MouseMoveDir*i, 2.0f, ZL_Color::Blue);

srfBuffer.RenderToEnd();

}

ZL_Display::ClearFill(ZL_Color::Black); //clear whole screen

srfBuffer.Draw(SurfacePosition);

}