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1 USING: alien alien.syntax alien.parser combinators
2 kernel parser sequences system words namespaces hashtables init
3 math arrays assocs continuations lexer fry locals vocabs.parser ;
4 IN: opengl.gl.extensions
5
6 ERROR: unknown-gl-platform ;
7 << {
8     { [ os windows? ] [ "opengl.gl.windows" ] }
9     { [ os macosx? ]  [ "opengl.gl.macosx" ] }
10     { [ os unix? ] [ "opengl.gl.gtk" ] }
11     [ throw-unknown-gl-platform ]
12 } cond use-vocab >>
13
14 SYMBOL: +gl-function-counter+
15 SYMBOL: +gl-function-pointers+
16
17 : reset-gl-function-number-counter ( -- )
18     0 +gl-function-counter+ set-global ;
19 : reset-gl-function-pointers ( -- )
20     100 <hashtable> +gl-function-pointers+ set-global ;
21
22 [ reset-gl-function-pointers ] "opengl.gl" add-startup-hook
23 reset-gl-function-pointers
24 reset-gl-function-number-counter
25
26 : gl-function-counter ( -- n )
27     +gl-function-counter+ get-global
28     dup 1 + +gl-function-counter+ set-global ;
29
30 : gl-function-pointer ( names n -- funptr )
31     gl-function-context 2array dup +gl-function-pointers+ get-global at
32     [ 2nip ] [
33         [
34             [ gl-function-address ] map [ ] find nip
35             dup [ "OpenGL function not available" throw ] unless
36             dup
37         ] dip
38         +gl-function-pointers+ get-global set-at
39     ] if* ;
40
41 : indirect-quot ( function-ptr-quot return types abi -- quot )
42     '[ @  _ _ _ alien-indirect ] ;
43
44 :: define-indirect ( abi return function-name function-ptr-quot types names -- )
45     function-name create-function
46     function-ptr-quot return types abi indirect-quot
47     names return function-effect
48     define-declared ;
49
50 SYNTAX: GL-FUNCTION:
51     gl-function-calling-convention
52     scan-function-name
53     "{" expect "}" parse-tokens over suffix
54     gl-function-counter '[ _ _ gl-function-pointer ]
55     scan-c-args define-indirect ;