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 ;
20 TUPLE: buffer < gpu-object
21 { upload-pattern buffer-upload-pattern }
22 { usage-pattern buffer-usage-pattern }
23 { kind buffer-kind } ;
27 : gl-buffer-usage ( buffer -- usage )
28 [ upload-pattern>> ] [ usage-pattern>> ] bi 2array {
29 { { stream-upload draw-usage } [ GL_STREAM_DRAW ] }
30 { { stream-upload read-usage } [ GL_STREAM_READ ] }
31 { { stream-upload copy-usage } [ GL_STREAM_COPY ] }
33 { { static-upload draw-usage } [ GL_STATIC_DRAW ] }
34 { { static-upload read-usage } [ GL_STATIC_READ ] }
35 { { static-upload copy-usage } [ GL_STATIC_COPY ] }
37 { { dynamic-upload draw-usage } [ GL_DYNAMIC_DRAW ] }
38 { { dynamic-upload read-usage } [ GL_DYNAMIC_READ ] }
39 { { dynamic-upload copy-usage } [ GL_DYNAMIC_COPY ] }
42 : gl-access ( access -- gl-access )
44 { read-access [ GL_READ_ONLY ] }
45 { write-access [ GL_WRITE_ONLY ] }
46 { read-write-access [ GL_READ_WRITE ] }
49 : gl-target ( kind -- target )
51 { vertex-buffer [ GL_ARRAY_BUFFER ] }
52 { index-buffer [ GL_ELEMENT_ARRAY_BUFFER ] }
53 { pixel-unpack-buffer [ GL_PIXEL_UNPACK_BUFFER ] }
54 { pixel-pack-buffer [ GL_PIXEL_PACK_BUFFER ] }
57 : get-buffer-int ( target enum -- value )
58 0 <int> [ glGetBufferParameteriv ] keep *int ;
60 : bind-buffer ( buffer -- target )
61 [ kind>> gl-target dup ] [ handle>> glBindBuffer ] bi ;
66 [ [ delete-gl-buffer ] when* f ] change-handle drop ;
69 { buffer buffer read-only }
70 { offset integer read-only } ;
71 C: <buffer-ptr> buffer-ptr
73 TUPLE: buffer-range < buffer-ptr
74 { size integer read-only } ;
75 C: <buffer-range> buffer-range
77 UNION: gpu-data-ptr buffer-ptr c-ptr ;
79 : buffer-size ( buffer -- size )
80 bind-buffer GL_BUFFER_SIZE get-buffer-int ;
82 : buffer-ptr>range ( buffer-ptr -- buffer-range )
83 [ buffer>> ] [ offset>> ] bi
84 2dup [ buffer-size ] dip -
87 :: allocate-buffer ( buffer size initial-data -- )
88 buffer bind-buffer :> target
89 target size initial-data buffer gl-buffer-usage glBufferData ;
91 : <buffer> ( upload usage kind size initial-data -- buffer )
92 [ [ gen-gl-buffer ] 3dip buffer boa dup ] 2dip allocate-buffer
95 : byte-array>buffer ( byte-array upload usage kind -- buffer )
97 [ byte-length ] [ ] bi <buffer> ;
99 :: update-buffer ( buffer-ptr size data -- )
100 buffer-ptr buffer>> :> buffer
101 buffer bind-buffer :> target
102 target buffer-ptr offset>> size data glBufferSubData ;
104 :: read-buffer ( buffer-ptr size -- data )
105 buffer-ptr buffer>> :> buffer
106 buffer bind-buffer :> target
107 size <byte-array> :> data
108 target buffer-ptr offset>> size data glGetBufferSubData
111 :: copy-buffer ( to-buffer-ptr from-buffer-ptr size -- )
112 GL_COPY_WRITE_BUFFER to-buffer-ptr buffer>> glBindBuffer
113 GL_COPY_READ_BUFFER from-buffer-ptr buffer>> glBindBuffer
115 GL_COPY_READ_BUFFER GL_COPY_WRITE_BUFFER
116 from-buffer-ptr offset>> to-buffer-ptr offset>>
117 size glCopyBufferSubData ;
119 :: with-mapped-buffer ( buffer access quot: ( alien -- ) -- )
120 buffer bind-buffer :> target
121 target access gl-access glMapBuffer
125 target glUnmapBuffer ; inline
127 :: with-bound-buffer ( buffer target quot: ( -- ) -- )
128 target gl-target buffer glBindBuffer
131 : with-buffer-ptr ( buffer-ptr target quot: ( c-ptr -- ) -- )
132 [ [ offset>> <alien> ] [ buffer>> handle>> ] bi ] 2dip
133 with-bound-buffer ; inline
135 : with-gpu-data-ptr ( gpu-data-ptr target quot: ( c-ptr -- ) -- )
138 [ [ gl-target 0 glBindBuffer ] dip call ] if ; inline