🚀 go-pugleaf

>Hi...
Ah, an English word, too bad the rest aren't...

>Ich suche die schnellste Moeglichkeit in Turbo C++ 3.0 mit einer  
>aufzurufenden Funktion einen Punkt auf den Bildschirm zu bringen.
Most overhead is the call to the plot routines. To really speed things
up, you should use a macro (#define) instead of a function.

>(VGA-Modus 13h, also 320x200x256)
>Diese darf auch gerne Inline-ASM benutzen. Sie sollte nur schneller sein  
>als alle anderen.
A putpixel routine is sooo simple, inline assembly won't do much good.
All you can do is a faster 'multiply'.

>char *ScreenAddr = (char*)0xA0000000;
>
>void drawxy(int x,int y,char color)
>{
>  *(ScreenAddr+320*y+x) = color;
>}
320*y = (y << 8) + (y << 6) =>

{
  *(ScreenAddr+(y << 8) + (y << 6) + x) = color;
}

or better

#define drawxy(x,y,c) {*(ScreenAddr + (y << 8) + (y << 6) + x) = color;}

Of course, with multiple pixel primitives (lines, circles, polygons) inline
assembly _can_ make a difference.

Another tip; NEVER user the drawxy primitive to draw lines, circles, etc..

Herman