This function does exactly the same as the draw_surface_stretched function with the added ability to set the colour blending and alpha value for the surface when it is drawn (similar to the function draw_surface_ext).
draw_surface_stretched_ext(id, x, y, w, h, col, alpha);
|id||The unique ID value of the surface to draw.|
|x||The x position of where to draw the surface.|
|y||The y position of where to draw the surface.|
|w||The width at which to draw the surface.|
|h||The height at which to draw the surface.|
|colour||The colour with which to colour the surface.|
|alpha||The alpha with which to blend the surface.|
draw_surface_stretched_ext(surf, x, y, 200, 200, c_white, 0.5);
This will draw the given surface with its left corner at the instances x/y position and it will be stretched to occupy an area of 200x200 pixels with no blending, but partial transparency.