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.data alien.strings libc opengl math sequences
5 combinators macros arrays io.encodings.ascii fry
6 specialized-arrays destructors accessors ;
7 SPECIALIZED-ARRAY: uint
10 : with-gl-shader-source-ptr ( string quot -- )
11 swap ascii malloc-string [ void* <ref> swap call ] keep free ; inline
13 : <gl-shader> ( source kind -- shader )
14 glCreateShader dup rot
15 [ 1 swap f glShaderSource ] with-gl-shader-source-ptr
16 [ glCompileShader ] keep
19 : (gl-shader?) ( object -- ? )
20 dup integer? [ glIsShader c-bool> ] [ drop f ] if ;
22 : gl-shader-get-int ( shader enum -- value )
23 { int } [ glGetShaderiv ] with-out-parameters ;
25 : gl-shader-ok? ( shader -- ? )
26 GL_COMPILE_STATUS gl-shader-get-int c-bool> ;
28 : <vertex-shader> ( source -- vertex-shader )
29 GL_VERTEX_SHADER <gl-shader> ; inline
31 : (vertex-shader?) ( object -- ? )
33 [ GL_SHADER_TYPE gl-shader-get-int GL_VERTEX_SHADER = ]
36 : <fragment-shader> ( source -- fragment-shader )
37 GL_FRAGMENT_SHADER <gl-shader> ; inline
39 : (fragment-shader?) ( object -- ? )
41 [ GL_SHADER_TYPE gl-shader-get-int GL_FRAGMENT_SHADER = ]
44 : gl-shader-info-log-length ( shader -- log-length )
45 GL_INFO_LOG_LENGTH gl-shader-get-int ; inline
47 : gl-shader-info-log ( shader -- log )
48 dup gl-shader-info-log-length dup [
50 [ 0 int <ref> swap glGetShaderInfoLog ] keep
54 : check-gl-shader ( shader -- shader )
55 dup gl-shader-ok? [ dup gl-shader-info-log throw ] unless ;
57 PREDICATE: gl-shader < integer (gl-shader?) ;
58 PREDICATE: vertex-shader < gl-shader (vertex-shader?) ;
59 PREDICATE: fragment-shader < gl-shader (fragment-shader?) ;
63 : attach-shaders ( program shaders -- )
64 [ glAttachShader ] with each ;
66 : (gl-program) ( shaders quot: ( gl-program -- ) -- program )
69 dup roll attach-shaders swap call
70 ] [ glLinkProgram ] [ ] tri gl-error ; inline
72 : <gl-program> ( shaders -- program )
73 [ drop ] (gl-program) ;
75 : (gl-program?) ( object -- ? )
76 dup integer? [ glIsProgram c-bool> ] [ drop f ] if ;
78 : gl-program-get-int ( program enum -- value )
79 { int } [ glGetProgramiv ] with-out-parameters ;
81 : gl-program-ok? ( program -- ? )
82 GL_LINK_STATUS gl-program-get-int c-bool> ;
84 : gl-program-info-log-length ( program -- log-length )
85 GL_INFO_LOG_LENGTH gl-program-get-int ; inline
87 : gl-program-info-log ( program -- log )
88 dup gl-program-info-log-length dup [
90 [ 0 int <ref> swap glGetProgramInfoLog ] keep
94 : check-gl-program ( program -- program )
95 dup gl-program-ok? [ dup gl-program-info-log throw ] unless ;
97 : gl-program-shaders-length ( program -- shaders-length )
98 GL_ATTACHED_SHADERS gl-program-get-int ; inline
100 ! On some macosx-x86-64 graphics drivers, glGetAttachedShaders tries to treat the
101 ! shaders parameter as a ulonglong array rather than a GLuint array as documented.
102 ! We hack around this by allocating a buffer twice the size and sifting out the zero
105 : gl-program-shaders ( program -- shaders )
106 dup gl-program-shaders-length 2 *
109 [ glGetAttachedShaders ] keep [ zero? ] reject ;
111 : delete-gl-program ( program -- )
112 dup gl-program-shaders [
113 2dup glDetachShader glDeleteShader
114 ] each glDeleteProgram ;
116 : with-gl-program ( program quot -- )
117 over glUseProgram [ 0 glUseProgram ] finally ; inline
119 PREDICATE: gl-program < integer (gl-program?) ;
121 : <simple-gl-program> ( vertex-shader-source fragment-shader-source
123 [ <vertex-shader> check-gl-shader ]
124 [ <fragment-shader> check-gl-shader ] bi*
125 2array <gl-program> check-gl-program ;