Difference between revisions of "84PCSE:BCALLs:55A2"

Revision as of 19:25, 19 October 2013

Synopsis

Unofficial Name: DrawThickRectBorder

BCALL Address: 55A2h

Draw a rectangular outline 2 pixels wide.

Inputs

• HL = X coordinate of left edge (must be at least 1)
• DE = X coordinate of right edge (must be greater than HL and at most 318)
• B = Y coordinate of top edge (from top of screen; must be at least 1)
• C = Y coordinate of bottom edge (must be greater than B and at most 238)
• (penFGColor) = RGB color to draw

Outputs

None

Destroys

• AF, BC, DE, HL
• Interrupts disabled

Comments

The rectangle is drawn only to the LCD, never to the graph buffer.

The dimensions of the enclosed area are (HL?DE?1) × (C?B?1) (just as for DrawRectBorder.) The outer dimensions of the border are (HL?DE+3) × (C?B+3).