1 ! Copyright (C) 2008 Joe Groff.
2 ! See http://factorcode.org/license.txt for BSD license.
3 USING: kernel opengl.gl alien.c-types continuations namespaces
4 assocs alien alien.strings libc opengl math sequences combinators
5 combinators.lib macros arrays io.encodings.ascii fry ;
8 : with-gl-shader-source-ptr ( string quot -- )
9 swap ascii malloc-string [ <void*> swap call ] keep free ; inline
11 : <gl-shader> ( source kind -- shader )
12 glCreateShader dup rot
13 [ 1 swap f glShaderSource ] with-gl-shader-source-ptr
14 [ glCompileShader ] keep
17 : (gl-shader?) ( object -- ? )
18 dup integer? [ glIsShader c-bool> ] [ drop f ] if ;
20 : gl-shader-get-int ( shader enum -- value )
21 0 <int> [ glGetShaderiv ] keep *int ;
23 : gl-shader-ok? ( shader -- ? )
24 GL_COMPILE_STATUS gl-shader-get-int c-bool> ;
26 : <vertex-shader> ( source -- vertex-shader )
27 GL_VERTEX_SHADER <gl-shader> ; inline
29 : (vertex-shader?) ( object -- ? )
31 [ GL_SHADER_TYPE gl-shader-get-int GL_VERTEX_SHADER = ]
34 : <fragment-shader> ( source -- fragment-shader )
35 GL_FRAGMENT_SHADER <gl-shader> ; inline
37 : (fragment-shader?) ( object -- ? )
39 [ GL_SHADER_TYPE gl-shader-get-int GL_FRAGMENT_SHADER = ]
42 : gl-shader-info-log-length ( shader -- log-length )
43 GL_INFO_LOG_LENGTH gl-shader-get-int ; inline
45 : gl-shader-info-log ( shader -- log )
46 dup gl-shader-info-log-length dup [
48 [ 0 <int> swap glGetShaderInfoLog ] keep
52 : check-gl-shader ( shader -- shader )
53 dup gl-shader-ok? [ dup gl-shader-info-log throw ] unless ;
55 : delete-gl-shader ( shader -- ) glDeleteShader ; inline
57 PREDICATE: gl-shader < integer (gl-shader?) ;
58 PREDICATE: vertex-shader < gl-shader (vertex-shader?) ;
59 PREDICATE: fragment-shader < gl-shader (fragment-shader?) ;
63 : <gl-program> ( shaders -- program )
65 [ dupd glAttachShader ] each
66 [ glLinkProgram ] keep
69 : (gl-program?) ( object -- ? )
70 dup integer? [ glIsProgram c-bool> ] [ drop f ] if ;
72 : gl-program-get-int ( program enum -- value )
73 0 <int> [ glGetProgramiv ] keep *int ;
75 : gl-program-ok? ( program -- ? )
76 GL_LINK_STATUS gl-program-get-int c-bool> ;
78 : gl-program-info-log-length ( program -- log-length )
79 GL_INFO_LOG_LENGTH gl-program-get-int ; inline
81 : gl-program-info-log ( program -- log )
82 dup gl-program-info-log-length dup [
84 [ 0 <int> swap glGetProgramInfoLog ] keep
88 : check-gl-program ( program -- program )
89 dup gl-program-ok? [ dup gl-program-info-log throw ] unless ;
91 : gl-program-shaders-length ( program -- shaders-length )
92 GL_ATTACHED_SHADERS gl-program-get-int ; inline
94 : gl-program-shaders ( program -- shaders )
95 dup gl-program-shaders-length
98 [ underlying>> glGetAttachedShaders ] { 3 1 } multikeep ;
100 : delete-gl-program-only ( program -- )
101 glDeleteProgram ; inline
103 : detach-gl-program-shader ( program shader -- )
104 glDetachShader ; inline
106 : delete-gl-program ( program -- )
107 dup gl-program-shaders [
108 2dup detach-gl-program-shader delete-gl-shader
109 ] each delete-gl-program-only ;
111 : with-gl-program ( program quot -- )
112 over glUseProgram [ 0 glUseProgram ] [ ] cleanup ; inline
114 PREDICATE: gl-program < integer (gl-program?) ;
116 : <simple-gl-program> ( vertex-shader-source fragment-shader-source -- program )
117 >r <vertex-shader> check-gl-shader
118 r> <fragment-shader> check-gl-shader
119 2array <gl-program> check-gl-program ;