Apple-2-SW/prog8
1
0
Fork 0
mirror of https://github.com/irmen/prog8.git synced 2025-01-11 13:29:45 +00:00
Code Issues Projects Releases Wiki Activity

doc

Browse Source
This commit is contained in:
Irmen de Jong 2020-12-21 18:28:10 +01:00
parent 50213f146a
commit 787f52d1f8
2 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
compiler/res/prog8lib/c64/graphics.p8
View File

@ -33,10 +33,10 @@ graphics {
sub line(uword @zp x1, ubyte @zp y1, uword @zp x2, ubyte @zp y2) { sub line(uword @zp x1, ubyte @zp y1, uword @zp x2, ubyte @zp y2) {
; Bresenham algorithm. ; Bresenham algorithm.
; This code special cases various quadrant loops to allow simple ++ and -- operations. ; This code special-cases various quadrant loops to allow simple ++ and -- operations.
; TODO rewrite this in optimized assembly ; TODO rewrite this in optimized assembly
if y1>y2 { if y1>y2 {
; make sure dy is always positive to avoid 8 instead of just 4 special cases ; make sure dy is always positive to have only 4 instead of 8 special cases
swap(x1, x2) swap(x1, x2)
swap(y1, y2) swap(y1, y2)
} }

4
docs/source/libraries.rst
View File

@ -16,6 +16,10 @@ with Prog8 are written like this.
You can ``%import`` and use these modules explicitly, but the compiler may also import one or more You can ``%import`` and use these modules explicitly, but the compiler may also import one or more
of these library modules automatically as required. of these library modules automatically as required.
For full details on what is available in the libraries, look at their source code here:
https://github.com/irmen/prog8/tree/master/compiler/res/prog8lib
.. caution:: .. caution::
The resulting compiled binary program *only works on the target machine it was compiled for*. The resulting compiled binary program *only works on the target machine it was compiled for*.
You must recompile the program for every target you want to run it on. You must recompile the program for every target you want to run it on.