Special Effects - Fujitsu MB86R02 Jade-D Hardware Manual

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MB86R02 'Jade-D' Hardware Manual V1.64

18.3.6 Special effects

Anti-aliasing

Anti-aliasing manipulates the line borders of polygons in sub-pixel units and blends the pre-drawing

pixel color with the background color to make 'jaggies' smooth. It is used as a functional option for

2D drawing (in direct color mode only).

Bold line and broken line drawing

This function draws lines of a specific width and a broken line.

• Supports vertical starting and ending points.

• Supports vertical broken line patterns.

• Interpolation of bold line joints supports the following modes:

(1) Broken line pattern reference address fix mode

→ The same broken line pattern is continuously referenced during the period of some pixels

starting from the joint and the starting point for the next line.

(2) No interpolation

• Supports width equalization of bold lines.

• Supports bold line edging.

• Does not support anti-aliasing of dashed line patterns.

• For a part overlaid due to connection of bold lines, natural overlay can be represented by providing

depth information (Z value).

This GDC supports shading primitives.

Drawing is performed at the body primitive coordinates (X, Y) with a shade as an offset. When drawing,

the Z buffer is used in order to differentiate between the body and shade.

Line Drawing Attributes

Selectable from 1 to 32 pixels

Set by 32 bit or 24 bit of broken line pattern