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 ] }
60 [ [ delete-gl-buffer ] when* f ] change-handle drop ;
63 { buffer buffer read-only }
64 { offset integer read-only } ;
65 C: <buffer-ptr> buffer-ptr
67 UNION: gpu-data-ptr buffer-ptr c-ptr ;
69 :: allocate-buffer ( buffer size initial-data -- )
70 buffer kind>> gl-target :> target
71 target buffer handle>> glBindBuffer
72 target size initial-data buffer gl-buffer-usage glBufferData ;
74 : <buffer> ( upload usage kind size initial-data -- buffer )
75 [ [ gen-gl-buffer ] 3dip buffer boa dup ] 2dip allocate-buffer
78 : byte-array>buffer ( byte-array upload usage kind -- buffer )
80 [ byte-length ] [ ] bi <buffer> ;
82 :: update-buffer ( buffer-ptr size data -- )
83 buffer-ptr buffer>> :> buffer
84 buffer kind>> gl-target :> target
85 target buffer handle>> glBindBuffer
86 target buffer-ptr offset>> size data glBufferSubData ;
88 :: read-buffer ( buffer-ptr size -- data )
89 buffer-ptr buffer>> :> buffer
90 buffer kind>> gl-target :> target
91 size <byte-array> :> data
92 target buffer handle>> glBindBuffer
93 target buffer-ptr offset>> size data glGetBufferSubData
96 :: copy-buffer ( to-buffer-ptr from-buffer-ptr size -- )
97 GL_COPY_WRITE_BUFFER to-buffer-ptr buffer>> glBindBuffer
98 GL_COPY_READ_BUFFER from-buffer-ptr buffer>> glBindBuffer
100 GL_COPY_READ_BUFFER GL_COPY_WRITE_BUFFER
101 from-buffer-ptr offset>> to-buffer-ptr offset>>
102 size glCopyBufferSubData ;
104 :: with-mapped-buffer ( buffer access quot: ( alien -- ) -- )
105 buffer kind>> gl-target :> target
107 target buffer handle>> glBindBuffer
108 target access gl-access glMapBuffer
112 target glUnmapBuffer ; inline
114 :: with-bound-buffer ( buffer target quot: ( -- ) -- )
115 target gl-target buffer glBindBuffer
118 : with-buffer-ptr ( buffer-ptr target quot: ( c-ptr -- ) -- )
119 [ [ offset>> <alien> ] [ buffer>> handle>> ] bi ] 2dip
120 with-bound-buffer ; inline
122 : with-gpu-data-ptr ( gpu-data-ptr target quot: ( c-ptr -- ) -- )
125 [ [ gl-target 0 glBindBuffer ] dip call ] if ; inline