Draw filled quadrilateral using scanline algorithm
General polygon filling routine for arbitrary convex quadrilaterals. Uses horizontal scanline approach with edge intersection calculation. Vertices should be provided in consistent order (clockwise or counter-clockwise).
@param image_data Target image buffer @param img_w, img_h Image dimensions @param x_quad, y_quad Quadrilateral vertex coordinates [4 vertices] @param r, g, b Fill color components [0.0, 1.0]
| Type | Intent | Optional | Attributes | Name | ||
|---|---|---|---|---|---|---|
| integer(kind=1), | intent(inout) | :: | image_data(:) | |||
| integer, | intent(in) | :: | img_w | |||
| integer, | intent(in) | :: | img_h | |||
| real(kind=wp), | intent(in) | :: | x_quad(4) | |||
| real(kind=wp), | intent(in) | :: | y_quad(4) | |||
| real(kind=wp), | intent(in) | :: | r | |||
| real(kind=wp), | intent(in) | :: | g | |||
| real(kind=wp), | intent(in) | :: | b |