135 lines
4.3 KiB
Factor
135 lines
4.3 KiB
Factor
! Copyright (C) 2008 Joe Groff.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel opengl.gl alien.c-types continuations namespaces
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assocs alien alien.data alien.strings libc opengl math sequences
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combinators macros arrays io.encodings.ascii fry
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specialized-arrays destructors accessors ;
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SPECIALIZED-ARRAY: uint
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IN: opengl.shaders
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: with-gl-shader-source-ptr ( string quot -- )
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swap ascii malloc-string [ void* <ref> swap call ] keep free ; inline
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: <gl-shader> ( source kind -- shader )
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glCreateShader dup rot
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[ 1 swap f glShaderSource ] with-gl-shader-source-ptr
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[ glCompileShader ] keep
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gl-error ;
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: (gl-shader?) ( object -- ? )
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dup integer? [ glIsShader c-bool> ] [ drop f ] if ;
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: gl-shader-get-int ( shader enum -- value )
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{ int } [ glGetShaderiv ] with-out-parameters ;
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: gl-shader-ok? ( shader -- ? )
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GL_COMPILE_STATUS gl-shader-get-int c-bool> ;
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: <vertex-shader> ( source -- vertex-shader )
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GL_VERTEX_SHADER <gl-shader> ; inline
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: (vertex-shader?) ( object -- ? )
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dup (gl-shader?)
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[ GL_SHADER_TYPE gl-shader-get-int GL_VERTEX_SHADER = ]
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[ drop f ] if ;
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: <fragment-shader> ( source -- fragment-shader )
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GL_FRAGMENT_SHADER <gl-shader> ; inline
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: (fragment-shader?) ( object -- ? )
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dup (gl-shader?)
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[ GL_SHADER_TYPE gl-shader-get-int GL_FRAGMENT_SHADER = ]
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[ drop f ] if ;
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: gl-shader-info-log-length ( shader -- log-length )
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GL_INFO_LOG_LENGTH gl-shader-get-int ; inline
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: gl-shader-info-log ( shader -- log )
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dup gl-shader-info-log-length dup [
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1 calloc &free
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[ 0 int <ref> swap glGetShaderInfoLog ] keep
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ascii alien>string
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] with-destructors ;
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: check-gl-shader ( shader -- shader )
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dup gl-shader-ok? [ dup gl-shader-info-log throw ] unless ;
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: delete-gl-shader ( shader -- ) glDeleteShader ; inline
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PREDICATE: gl-shader < integer (gl-shader?) ;
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PREDICATE: vertex-shader < gl-shader (vertex-shader?) ;
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PREDICATE: fragment-shader < gl-shader (fragment-shader?) ;
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! Programs
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: (gl-program) ( shaders quot: ( gl-program -- ) -- program )
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glCreateProgram
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[
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[ swap [ glAttachShader ] with each ]
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[ swap call ] bi-curry bi*
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] [ glLinkProgram ] [ ] tri gl-error ; inline
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: <mrt-gl-program> ( shaders frag-data-locations -- program )
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[ [ first2 swap glBindFragDataLocation ] with each ] curry (gl-program) ;
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: <gl-program> ( shaders -- program )
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[ drop ] (gl-program) ;
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: (gl-program?) ( object -- ? )
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dup integer? [ glIsProgram c-bool> ] [ drop f ] if ;
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: gl-program-get-int ( program enum -- value )
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{ int } [ glGetProgramiv ] with-out-parameters ;
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: gl-program-ok? ( program -- ? )
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GL_LINK_STATUS gl-program-get-int c-bool> ;
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: gl-program-info-log-length ( program -- log-length )
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GL_INFO_LOG_LENGTH gl-program-get-int ; inline
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: gl-program-info-log ( program -- log )
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dup gl-program-info-log-length dup [
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1 calloc &free
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[ 0 int <ref> swap glGetProgramInfoLog ] keep
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ascii alien>string
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] with-destructors ;
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: check-gl-program ( program -- program )
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dup gl-program-ok? [ dup gl-program-info-log throw ] unless ;
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: gl-program-shaders-length ( program -- shaders-length )
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GL_ATTACHED_SHADERS gl-program-get-int ; inline
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! On some macosx-x86-64 graphics drivers, glGetAttachedShaders tries to treat the
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! shaders parameter as a ulonglong array rather than a GLuint array as documented.
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! We hack around this by allocating a buffer twice the size and sifting out the zero
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! values
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: gl-program-shaders ( program -- shaders )
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dup gl-program-shaders-length 2 *
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0 int <ref>
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over uint <c-array>
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[ glGetAttachedShaders ] keep [ zero? not ] filter ;
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: delete-gl-program-only ( program -- )
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glDeleteProgram ; inline
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: detach-gl-program-shader ( program shader -- )
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glDetachShader ; inline
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: delete-gl-program ( program -- )
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dup gl-program-shaders [
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2dup detach-gl-program-shader delete-gl-shader
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] each delete-gl-program-only ;
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: with-gl-program ( program quot -- )
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over glUseProgram [ 0 glUseProgram ] [ ] cleanup ; inline
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PREDICATE: gl-program < integer (gl-program?) ;
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: <simple-gl-program> ( vertex-shader-source fragment-shader-source -- program )
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[ <vertex-shader> check-gl-shader ]
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[ <fragment-shader> check-gl-shader ] bi*
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2array <gl-program> check-gl-program ;
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