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 macros arrays io.encodings.ascii fry specialized-arrays.uint
6 destructors accessors ;
9 : with-gl-shader-source-ptr ( string quot -- )
10 swap ascii malloc-string [ <void*> swap call ] keep free ; inline
12 : <gl-shader> ( source kind -- shader )
13 glCreateShader dup rot
14 [ 1 swap f glShaderSource ] with-gl-shader-source-ptr
15 [ glCompileShader ] keep
18 : (gl-shader?) ( object -- ? )
19 dup integer? [ glIsShader c-bool> ] [ drop f ] if ;
21 : gl-shader-get-int ( shader enum -- value )
22 0 <int> [ glGetShaderiv ] keep *int ;
24 : gl-shader-ok? ( shader -- ? )
25 GL_COMPILE_STATUS gl-shader-get-int c-bool> ;
27 : <vertex-shader> ( source -- vertex-shader )
28 GL_VERTEX_SHADER <gl-shader> ; inline
30 : (vertex-shader?) ( object -- ? )
32 [ GL_SHADER_TYPE gl-shader-get-int GL_VERTEX_SHADER = ]
35 : <fragment-shader> ( source -- fragment-shader )
36 GL_FRAGMENT_SHADER <gl-shader> ; inline
38 : (fragment-shader?) ( object -- ? )
40 [ GL_SHADER_TYPE gl-shader-get-int GL_FRAGMENT_SHADER = ]
43 : gl-shader-info-log-length ( shader -- log-length )
44 GL_INFO_LOG_LENGTH gl-shader-get-int ; inline
46 : gl-shader-info-log ( shader -- log )
47 dup gl-shader-info-log-length dup [
49 [ 0 <int> swap glGetShaderInfoLog ] keep
53 : check-gl-shader ( shader -- shader )
54 dup gl-shader-ok? [ dup gl-shader-info-log throw ] unless ;
56 : delete-gl-shader ( shader -- ) glDeleteShader ; inline
58 PREDICATE: gl-shader < integer (gl-shader?) ;
59 PREDICATE: vertex-shader < gl-shader (vertex-shader?) ;
60 PREDICATE: fragment-shader < gl-shader (fragment-shader?) ;
64 : (gl-program) ( shaders quot: ( gl-program -- ) -- program )
67 [ swap [ glAttachShader ] with each ]
68 [ swap call ] bi-curry bi*
69 ] [ glLinkProgram ] [ ] tri gl-error ; inline
71 : <mrt-gl-program> ( shaders frag-data-locations -- program )
72 [ [ first2 swap glBindFragDataLocation ] with each ] curry (gl-program) ;
74 : <gl-program> ( shaders -- program )
75 [ drop ] (gl-program) ;
77 : (gl-program?) ( object -- ? )
78 dup integer? [ glIsProgram c-bool> ] [ drop f ] if ;
80 : gl-program-get-int ( program enum -- value )
81 0 <int> [ glGetProgramiv ] keep *int ;
83 : gl-program-ok? ( program -- ? )
84 GL_LINK_STATUS gl-program-get-int c-bool> ;
86 : gl-program-info-log-length ( program -- log-length )
87 GL_INFO_LOG_LENGTH gl-program-get-int ; inline
89 : gl-program-info-log ( program -- log )
90 dup gl-program-info-log-length dup [
92 [ 0 <int> swap glGetProgramInfoLog ] keep
96 : check-gl-program ( program -- program )
97 dup gl-program-ok? [ dup gl-program-info-log throw ] unless ;
99 : gl-program-shaders-length ( program -- shaders-length )
100 GL_ATTACHED_SHADERS gl-program-get-int ; inline
102 ! On some macosx-x86-64 graphics drivers, glGetAttachedShaders tries to treat the
103 ! shaders parameter as a ulonglong array rather than a GLuint array as documented.
104 ! We hack around this by allocating a buffer twice the size and sifting out the zero
107 : gl-program-shaders ( program -- shaders )
108 dup gl-program-shaders-length 2 *
111 [ glGetAttachedShaders ] keep [ zero? not ] filter ;
113 : delete-gl-program-only ( program -- )
114 glDeleteProgram ; inline
116 : detach-gl-program-shader ( program shader -- )
117 glDetachShader ; inline
119 : delete-gl-program ( program -- )
120 dup gl-program-shaders [
121 2dup detach-gl-program-shader delete-gl-shader
122 ] each delete-gl-program-only ;
124 : with-gl-program ( program quot -- )
125 over glUseProgram [ 0 glUseProgram ] [ ] cleanup ; inline
127 PREDICATE: gl-program < integer (gl-program?) ;
129 : <simple-gl-program> ( vertex-shader-source fragment-shader-source -- program )
130 [ <vertex-shader> check-gl-shader ]
131 [ <fragment-shader> check-gl-shader ] bi*
132 2array <gl-program> check-gl-program ;