touchgfx::Rasterizer class

@class Rasterizer Rasterizer.hpp touchgfx/canvas_widget_renderer/Rasterizer.hpp Polygon Rasterizer that is used to render filled polygons with high-quality Anti- Aliasing. Polygon Rasterizer that is used to render filled polygons with high-quality Anti- Aliasing. Internally, by default, the class uses integer coordinates in format 24.8, i.e. 24 bits for integer part and 8 bits for fractional - see POLY_BASE_SHIFT. This class can be used in the following way: 1. setFillingRule(FillingRule fr) - optional. 2. reset() 3. moveTo(x, y) / lineTo(x, y) - make the polygon. One can create more than one contour, but each contour must consist of at least 3 vertices, i.e. moveTo(x1, y1); lineTo(x2, y2); lineTo(x3, y3); is the absolute minimum of vertices that define a triangle. The algorithm does not check either the number of vertices nor coincidence of their coordinates, but in the worst case it just won't draw anything. The order of the vertices (clockwise or counterclockwise) is important when using the non-zero filling rule (fill_non_zero). In this case the vertex order of all the contours must be the same if you want your intersecting polygons to be without "holes". You actually can use different vertices order. If the contours do not intersect each other the order is not important anyway. If they do, contours with the same vertex order will be rendered without "holes" while the intersecting contours with different orders will have "holes". setFillingRule() can be called anytime before "sweeping".