1 ! Copyright (C) 2005, 2009 Slava Pestov.
2 ! Portions copyright (C) 2007 Eduardo Cavazos.
3 ! Portions copyright (C) 2008 Joe Groff.
4 ! See http://factorcode.org/license.txt for BSD license.
5 USING: alien alien.c-types alien.data assocs colors
6 combinators.smart continuations fry init kernel locals macros
7 math namespaces opengl.gl sequences sequences.generalizations
8 specialized-arrays words ;
9 FROM: alien.c-types => float ;
10 SPECIALIZED-ARRAY: float
11 SPECIALIZED-ARRAY: uint
14 SYMBOL: gl-scale-factor
16 : gl-color ( color -- ) >rgba-components glColor4d ; inline
18 : gl-clear-color ( color -- ) >rgba-components glClearColor ;
20 : gl-clear ( color -- )
21 gl-clear-color GL_COLOR_BUFFER_BIT glClear ;
23 : error>string ( n -- string )
26 { 0x0501 "Invalid value" }
27 { 0x0500 "Invalid enumerant" }
28 { 0x0502 "Invalid operation" }
29 { 0x0503 "Stack overflow" }
30 { 0x0504 "Stack underflow" }
31 { 0x0505 "Out of memory" }
32 { 0x0506 "Invalid framebuffer operation" }
33 } at "Unknown error" or ;
35 TUPLE: gl-error-tuple function code string ;
37 : <gl-error> ( function code -- gl-error )
38 dup error>string \ gl-error-tuple boa ; inline
40 : gl-error-code ( -- code/f )
41 glGetError dup 0 = [ drop f ] when ; inline
43 : (gl-error) ( function -- )
44 gl-error-code [ <gl-error> throw ] [ drop ] if* ;
49 : do-enabled ( what quot -- )
50 over glEnable dip glDisable ; inline
52 : do-enabled-client-state ( what quot -- )
53 over glEnableClientState dip glDisableClientState ; inline
55 : words>values ( word/value-seq -- value-seq )
56 [ dup word? [ execute( -- x ) ] when ] map ;
58 : (all-enabled) ( seq quot -- )
59 [ dup [ glEnable ] each ] dip
61 [ glDisable ] each ; inline
63 : (all-enabled-client-state) ( seq quot -- )
64 [ dup [ glEnableClientState ] each ] dip
66 [ glDisableClientState ] each ; inline
68 MACRO: all-enabled ( seq quot -- quot )
69 [ words>values ] dip '[ _ _ (all-enabled) ] ;
71 MACRO: all-enabled-client-state ( seq quot -- quot )
72 [ words>values ] dip '[ _ _ (all-enabled-client-state) ] ;
74 : do-matrix ( quot -- )
75 glPushMatrix call glPopMatrix ; inline
77 : gl-material ( face pname params -- )
78 float-array{ } like glMaterialfv ;
80 : gl-vertex-pointer ( seq -- )
81 [ 2 GL_FLOAT 0 ] dip glVertexPointer ; inline
83 : gl-color-pointer ( seq -- )
84 [ 4 GL_FLOAT 0 ] dip glColorPointer ; inline
86 : gl-texture-coord-pointer ( seq -- )
87 [ 2 GL_FLOAT 0 ] dip glTexCoordPointer ; inline
89 : (line-vertices) ( a b -- vertices )
90 [ first2 [ 0.3 + ] bi@ ] bi@ 4 float-array{ } nsequence ;
92 : line-vertices ( a b -- )
93 (line-vertices) gl-vertex-pointer ;
96 line-vertices GL_LINES 0 2 glDrawArrays ;
98 :: (rect-vertices) ( loc dim -- vertices )
99 #! We use GL_LINE_STRIP with a duplicated first vertex
100 #! instead of GL_LINE_LOOP to work around a bug in Apple's
102 loc first2 [ 0.3 + ] bi@ :> ( x y )
103 dim first2 [ 0.6 - ] bi@ :> ( w h )
110 ] float-array{ } output>sequence ;
112 : rect-vertices ( loc dim -- )
113 (rect-vertices) gl-vertex-pointer ;
116 GL_LINE_STRIP 0 5 glDrawArrays ;
118 : gl-rect ( loc dim -- )
119 rect-vertices (gl-rect) ;
121 :: (fill-rect-vertices) ( loc dim -- vertices )
122 loc first2 :> ( x y )
123 dim first2 :> ( w h )
129 ] float-array{ } output>sequence ;
131 : fill-rect-vertices ( loc dim -- )
132 (fill-rect-vertices) gl-vertex-pointer ;
134 : (gl-fill-rect) ( -- )
135 GL_QUADS 0 4 glDrawArrays ;
137 : gl-fill-rect ( loc dim -- )
138 fill-rect-vertices (gl-fill-rect) ;
140 : do-attribs ( bits quot -- )
141 swap glPushAttrib call glPopAttrib ; inline
143 : (gen-gl-object) ( quot -- id )
144 [ 1 { uint } ] dip with-out-parameters ; inline
146 : (delete-gl-object) ( id quot -- )
147 [ 1 swap uint <ref> ] dip call ; inline
149 : gen-gl-buffer ( -- id )
150 [ glGenBuffers ] (gen-gl-object) ;
152 : delete-gl-buffer ( id -- )
153 [ glDeleteBuffers ] (delete-gl-object) ;
155 :: with-gl-buffer ( binding id quot -- )
156 binding id glBindBuffer
157 quot [ binding 0 glBindBuffer ] [ ] cleanup ; inline
159 : with-array-element-buffers ( array-buffer element-buffer quot -- )
160 [ GL_ELEMENT_ARRAY_BUFFER ] 2dip '[
161 GL_ARRAY_BUFFER swap _ with-gl-buffer
162 ] with-gl-buffer ; inline
164 : gen-vertex-array ( -- id )
165 [ glGenVertexArrays ] (gen-gl-object) ;
167 : delete-vertex-array ( id -- )
168 [ glDeleteVertexArrays ] (delete-gl-object) ;
170 :: with-vertex-array ( id quot -- )
172 quot [ 0 glBindVertexArray ] [ ] cleanup ; inline
174 : <gl-buffer> ( target data hint -- id )
177 [ [ byte-length ] keep ] dip glBufferData
181 : buffer-offset ( int -- alien )
184 : bind-texture-unit ( id target unit -- )
185 glActiveTexture swap glBindTexture gl-error ;
187 : (set-draw-buffers) ( buffers -- )
188 [ length ] [ uint >c-array ] bi glDrawBuffers ;
190 MACRO: set-draw-buffers ( buffers -- quot )
191 words>values '[ _ (set-draw-buffers) ] ;
193 : gen-dlist ( -- id ) 1 glGenLists ;
195 : make-dlist ( type quot -- id )
196 [ gen-dlist ] 2dip '[ _ glNewList @ glEndList ] keep ; inline
198 : gl-translate ( point -- ) first2 0.0 glTranslated ;
200 : delete-dlist ( id -- ) 1 glDeleteLists ;
202 : with-translation ( loc quot -- )
203 [ [ gl-translate ] dip call ] do-matrix ; inline
205 : gl-scale ( m -- n )
206 gl-scale-factor get-global [ * ] when* ; inline
208 : gl-unscale ( m -- n )
209 gl-scale-factor get-global [ / ] when* ; inline
211 : fix-coordinates ( point1 point2 -- x1 y1 x2 y2 )
212 [ first2 [ gl-scale >fixnum ] bi@ ] bi@ ;
214 : gl-set-clip ( loc dim -- )
215 fix-coordinates glScissor ;
217 : gl-viewport ( loc dim -- )
218 fix-coordinates glViewport ;
220 : init-matrices ( -- )
221 #! Leaves with matrix mode GL_MODELVIEW
222 GL_PROJECTION glMatrixMode
224 GL_MODELVIEW glMatrixMode
227 [ f gl-scale-factor set-global ] "opengl" add-startup-hook