MB86290A Datasheet, PDF (62/184 Pages) Fujitsu Component Limited. – Graphics Controller Hardware Specifications

6.2 Polygon Drawing
6.2.1 Drawing Primitives
MB86290A supports the following primitive types:
- Point
- Line
- Triangle
- Fast2DLine
- Fast2Dtriangle
- Polygon
6.2.2 Polygon Drawing
An irregular polygon (including concave shape) is drawn by dedicated
hardware as follows:
1. Execute PolygonBegin command
Initialize polygon draw enginew
2. Draw vertices.
Draw outline of polygon and plot all vertices to polygon draw flag
buffer utilizing Fast2Dtriangle primitive.
3. Execute PolygonEnd command.
Copy shape in polygon draw flag buffer to drawing frame and fill
shape with color or specified tiling pattern.
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