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- TVGRAPH 1.02
- TURBO VISION
- using TURBO VISION In EGA/VGA graphics
- (C) Mindware 1991
- Brisbane,QLD,Australia
- Fido : 3:640/305.1
-
- 0. See Modified TVDEMO program and STYX.PAS to show you how to do things
-
- 1. All that is required is to include TVGRAPH in the uses statement in your
- main program and amazing - TVGRAPH will work in graphics mode.
-
- 2. Declarations are as follows
-
- type
- PGRect=^GRect;
- GRect=Trect;
-
- PGPoint=^GPoint;
- GPoint=TPoint; (* These two just to avoid confusion *)
-
- 3. Graphics IDs
- All "text" windows are given a graphics ID of 0, each window you want
- to use graphics in - you need to assign a graphics ID to it, if a line is
- drawn using the internal RawDrawLine - then if the current graphics window
- is the same as the location you are writing to on the screen then the graphics
- will overwrite - else the graphics will be clipped.
-
- function NextGraphId:byte; (* Get next available graphics id *)
- procedure UseGraphId(b:byte); (* Use graphics ID for following graphics *)
- procedure ReleaseGraphId(b:byte); (* release graphics ID for use *)
-
- To assign a graphics id to a character cell ensure you write character n with
- attribute 0FFh into the location using standard TURBO VISION methods.
-
-
- 4. Other routines
- procedure TextToGraphics(T:TRect;var G:Grect);
- (*converts a Text rectangle T into a Grect based on current screen locations *)
-
- procedure RawDrawLine(X1,Y1,X2,Y2:integer;Color:word);
- (* draw line from using screen co-ordinates *)
-
- procedure DrawLine(X1,Y1,X2,Y2:integer;Color:word);
- (* draw line using global co-ordinates i.e. *)
- (* X is 0..GraphXMax (10000) *)
- (* Y is 0..GraphYMax=(07500) *)
-
- function ISin(X:integer):integer;
- function ICos(X:integer):integer;
- (* Integer trig functions - X is number of 16ths of a degree *)
- (* returns number -1024..1024 representing -1.000..+1.000 *)
-
- 5. Note
-
- Portions of TVGDEMO.PAS and DEMOCMDS.PAS are copyright (C) 1990 Borland,
- and are given here in modified form purely to demonstrate the
- capability of TVGRAPH.
-