1 ! (c)2009 Joe Groff bsd license
2 USING: accessors alien alien.c-types arrays byte-arrays
3 combinators destructors gpu kernel locals math opengl opengl.gl
4 ui.gadgets.worlds variants ;
7 VARIANT: buffer-upload-pattern
8 stream-upload static-upload dynamic-upload ;
10 VARIANT: buffer-usage-pattern
11 draw-usage read-usage copy-usage ;
13 VARIANT: buffer-access-mode
14 read-access write-access read-write-access ;
17 vertex-buffer index-buffer
18 pixel-unpack-buffer pixel-pack-buffer
19 transform-feedback-buffer ;
21 TUPLE: buffer < gpu-object
22 { upload-pattern buffer-upload-pattern }
23 { usage-pattern buffer-usage-pattern }
24 { kind buffer-kind } ;
28 : gl-buffer-usage ( buffer -- usage )
29 [ upload-pattern>> ] [ usage-pattern>> ] bi 2array {
30 { { stream-upload draw-usage } [ GL_STREAM_DRAW ] }
31 { { stream-upload read-usage } [ GL_STREAM_READ ] }
32 { { stream-upload copy-usage } [ GL_STREAM_COPY ] }
34 { { static-upload draw-usage } [ GL_STATIC_DRAW ] }
35 { { static-upload read-usage } [ GL_STATIC_READ ] }
36 { { static-upload copy-usage } [ GL_STATIC_COPY ] }
38 { { dynamic-upload draw-usage } [ GL_DYNAMIC_DRAW ] }
39 { { dynamic-upload read-usage } [ GL_DYNAMIC_READ ] }
40 { { dynamic-upload copy-usage } [ GL_DYNAMIC_COPY ] }
43 : gl-access ( access -- gl-access )
45 { read-access [ GL_READ_ONLY ] }
46 { write-access [ GL_WRITE_ONLY ] }
47 { read-write-access [ GL_READ_WRITE ] }
50 : gl-target ( kind -- target )
52 { vertex-buffer [ GL_ARRAY_BUFFER ] }
53 { index-buffer [ GL_ELEMENT_ARRAY_BUFFER ] }
54 { pixel-unpack-buffer [ GL_PIXEL_UNPACK_BUFFER ] }
55 { pixel-pack-buffer [ GL_PIXEL_PACK_BUFFER ] }
56 { transform-feedback-buffer [ GL_TRANSFORM_FEEDBACK_BUFFER ] }
59 : get-buffer-int ( target enum -- value )
60 0 <int> [ glGetBufferParameteriv ] keep *int ;
62 : bind-buffer ( buffer -- target )
63 [ kind>> gl-target dup ] [ handle>> glBindBuffer ] bi ;
68 [ [ delete-gl-buffer ] when* f ] change-handle drop ;
71 { buffer buffer read-only }
72 { offset integer read-only } ;
73 C: <buffer-ptr> buffer-ptr
75 TUPLE: buffer-range < buffer-ptr
76 { size integer read-only } ;
77 C: <buffer-range> buffer-range
79 UNION: gpu-data-ptr buffer-ptr c-ptr ;
81 : buffer-size ( buffer -- size )
82 bind-buffer GL_BUFFER_SIZE get-buffer-int ;
84 : buffer-ptr>range ( buffer-ptr -- buffer-range )
85 [ buffer>> ] [ offset>> ] bi
86 2dup [ buffer-size ] dip -
87 buffer-range boa ; inline
89 :: allocate-buffer ( buffer size initial-data -- )
90 buffer bind-buffer :> target
91 target size initial-data buffer gl-buffer-usage glBufferData ;
93 : <buffer> ( upload usage kind size initial-data -- buffer )
94 [ [ gen-gl-buffer ] 3dip buffer boa dup ] 2dip allocate-buffer
97 : byte-array>buffer ( byte-array upload usage kind -- buffer )
99 [ byte-length ] [ ] bi <buffer> ;
101 :: update-buffer ( buffer-ptr size data -- )
102 buffer-ptr buffer>> :> buffer
103 buffer bind-buffer :> target
104 target buffer-ptr offset>> size data glBufferSubData ;
106 :: read-buffer ( buffer-ptr size -- data )
107 buffer-ptr buffer>> :> buffer
108 buffer bind-buffer :> target
109 size <byte-array> :> data
110 target buffer-ptr offset>> size data glGetBufferSubData
113 :: copy-buffer ( to-buffer-ptr from-buffer-ptr size -- )
114 GL_COPY_WRITE_BUFFER to-buffer-ptr buffer>> glBindBuffer
115 GL_COPY_READ_BUFFER from-buffer-ptr buffer>> glBindBuffer
117 GL_COPY_READ_BUFFER GL_COPY_WRITE_BUFFER
118 from-buffer-ptr offset>> to-buffer-ptr offset>>
119 size glCopyBufferSubData ;
121 :: with-mapped-buffer ( buffer access quot: ( alien -- ) -- )
122 buffer bind-buffer :> target
123 target access gl-access glMapBuffer
127 target glUnmapBuffer drop ; inline
129 :: with-bound-buffer ( buffer target quot: ( -- ) -- )
130 target gl-target buffer glBindBuffer
133 : with-buffer-ptr ( buffer-ptr target quot: ( c-ptr -- ) -- )
134 [ [ offset>> <alien> ] [ buffer>> handle>> ] bi ] 2dip
135 with-bound-buffer ; inline
137 : with-gpu-data-ptr ( gpu-data-ptr target quot: ( c-ptr -- ) -- )
140 [ [ gl-target 0 glBindBuffer ] dip call ] if ; inline