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Modula Definition | 1992-07-02 | 1.4 KB | 35 lines |
- (* Screen BIOS screen routines Chris Harshman 1992
- These procedures are useful for working with screen data directly,
- such as reading a character at a point on the screen, or making a copy of the
- screen to hold for later. *)
-
- DEFINITION MODULE Screen;
-
- TYPE ScreenData = ARRAY [0..6599] OF CHAR;
-
- PROCEDURE SaveScreen(VAR s:ScreenData);
- (* Saves all screen data into the array s, includes characters and
- colors used. Call before a SetWindow to later erase the window
- from the screen. *)
-
- PROCEDURE RestoreScreen(VAR s:ScreenData);
- (* Restores all screen data back to the screen from array s. Call to
- return the screen to its previous conditions when SaveScreen was
- called. *)
-
- PROCEDURE GetPosition(VAR v,h:CARDINAL);
- (* Returns the row and column of the cursor's position. The coordinates
- v and h will be screen relative not window relative. *)
-
- PROCEDURE GetChar(VAR ch:CHAR; VAR fc,bc:CARDINAL);
- (* Returns the character and its foreground and background colors at the
- current cursor location. Use SetCursor before using to be accurate. *)
-
- PROCEDURE PrintScreen();
- (* Simmilar to pressing Ctrl-PrtSc. Dumps the screen to the printer. *)
-
- PROCEDURE CursorOff();
- (* Turns the text screen cursor off. To turn back on, call the procedure
- for setting the used text video mode, ex. SetText *)
-
- END Screen.