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 ascii calendar combinators.short-circuit
6 continuations kernel libc math macros namespaces math.vectors
7 math.parser opengl.gl combinators combinators.smart arrays
8 sequences splitting words byte-arrays assocs vocabs
9 colors colors.constants accessors generalizations locals fry
11 SPECIALIZED-ARRAY: float
12 SPECIALIZED-ARRAY: uint
15 : gl-color ( color -- ) >rgba-components glColor4d ; inline
17 : gl-clear-color ( color -- ) >rgba-components glClearColor ;
19 : gl-clear ( color -- )
20 gl-clear-color GL_COLOR_BUFFER_BIT glClear ;
22 : error>string ( n -- string )
25 { HEX: 0501 "Invalid value" }
26 { HEX: 0500 "Invalid enumerant" }
27 { HEX: 0502 "Invalid operation" }
28 { HEX: 0503 "Stack overflow" }
29 { HEX: 0504 "Stack underflow" }
30 { HEX: 0505 "Out of memory" }
31 { HEX: 0506 "Invalid framebuffer operation" }
32 } at "Unknown error" or ;
34 TUPLE: gl-error function code string ;
36 : <gl-error> ( function code -- gl-error )
37 dup error>string \ gl-error boa ; inline
39 : gl-error-code ( -- code/f )
40 glGetError dup 0 = [ drop f ] when ; inline
42 : (gl-error) ( function -- )
43 gl-error-code [ <gl-error> throw ] [ drop ] if* ;
48 : do-enabled ( what quot -- )
49 over glEnable dip glDisable ; inline
51 : do-enabled-client-state ( what quot -- )
52 over glEnableClientState dip glDisableClientState ; inline
54 : words>values ( word/value-seq -- value-seq )
57 : (all-enabled) ( seq quot -- )
58 over [ glEnable ] each dip [ glDisable ] each ; inline
60 : (all-enabled-client-state) ( seq quot -- )
61 [ dup [ glEnableClientState ] each ] dip
63 [ glDisableClientState ] each ; inline
65 MACRO: all-enabled ( seq quot -- )
66 [ words>values ] dip '[ _ _ (all-enabled) ] ;
68 MACRO: all-enabled-client-state ( seq quot -- )
69 [ words>values ] dip '[ _ _ (all-enabled-client-state) ] ;
71 : do-matrix ( quot -- )
72 glPushMatrix call glPopMatrix ; inline
74 : gl-material ( face pname params -- )
75 float-array{ } like glMaterialfv ;
77 : gl-vertex-pointer ( seq -- )
78 [ 2 GL_FLOAT 0 ] dip glVertexPointer ; inline
80 : gl-color-pointer ( seq -- )
81 [ 4 GL_FLOAT 0 ] dip glColorPointer ; inline
83 : gl-texture-coord-pointer ( seq -- )
84 [ 2 GL_FLOAT 0 ] dip glTexCoordPointer ; inline
86 : line-vertices ( a b -- )
87 [ first2 [ 0.5 + ] bi@ ] bi@ 4 float-array{ } nsequence
91 line-vertices GL_LINES 0 2 glDrawArrays ;
93 :: (rect-vertices) ( loc dim -- vertices )
94 #! We use GL_LINE_STRIP with a duplicated first vertex
95 #! instead of GL_LINE_LOOP to work around a bug in Apple's
102 x w + 0.3 - y h + 0.3 -
105 ] float-array{ } output>sequence ;
107 : rect-vertices ( loc dim -- )
108 (rect-vertices) gl-vertex-pointer ;
111 GL_LINE_STRIP 0 5 glDrawArrays ;
113 : gl-rect ( loc dim -- )
114 rect-vertices (gl-rect) ;
116 :: (fill-rect-vertices) ( loc dim -- vertices )
124 ] float-array{ } output>sequence ;
126 : fill-rect-vertices ( loc dim -- )
127 (fill-rect-vertices) gl-vertex-pointer ;
129 : (gl-fill-rect) ( -- )
130 GL_QUADS 0 4 glDrawArrays ;
132 : gl-fill-rect ( loc dim -- )
133 fill-rect-vertices (gl-fill-rect) ;
135 : do-attribs ( bits quot -- )
136 swap glPushAttrib call glPopAttrib ; inline
138 : (gen-gl-object) ( quot -- id )
139 [ 1 0 <uint> ] dip keep *uint ; inline
141 : (delete-gl-object) ( id quot -- )
142 [ 1 swap <uint> ] dip call ; inline
144 : gen-gl-buffer ( -- id )
145 [ glGenBuffers ] (gen-gl-object) ;
147 : delete-gl-buffer ( id -- )
148 [ glDeleteBuffers ] (delete-gl-object) ;
150 :: with-gl-buffer ( binding id quot -- )
151 binding id glBindBuffer
152 quot [ binding 0 glBindBuffer ] [ ] cleanup ; inline
154 : with-array-element-buffers ( array-buffer element-buffer quot -- )
155 [ GL_ELEMENT_ARRAY_BUFFER ] 2dip '[
156 GL_ARRAY_BUFFER swap _ with-gl-buffer
157 ] with-gl-buffer ; inline
159 : gen-vertex-array ( -- id )
160 [ glGenVertexArrays ] (gen-gl-object) ;
162 : delete-vertex-array ( id -- )
163 [ glDeleteVertexArrays ] (delete-gl-object) ;
165 :: with-vertex-array ( id quot -- )
167 quot [ 0 glBindVertexArray ] [ ] cleanup ; inline
169 : <gl-buffer> ( target data hint -- id )
172 [ [ byte-length ] keep ] dip glBufferData
176 : buffer-offset ( int -- alien )
179 : bind-texture-unit ( id target unit -- )
180 glActiveTexture swap glBindTexture gl-error ;
182 : (set-draw-buffers) ( buffers -- )
183 [ length ] [ >uint-array ] bi glDrawBuffers ;
185 MACRO: set-draw-buffers ( buffers -- )
186 words>values '[ _ (set-draw-buffers) ] ;
188 : gen-dlist ( -- id ) 1 glGenLists ;
190 : make-dlist ( type quot -- id )
191 [ gen-dlist ] 2dip '[ _ glNewList @ glEndList ] keep ; inline
193 : gl-translate ( point -- ) first2 0.0 glTranslated ;
195 : delete-dlist ( id -- ) 1 glDeleteLists ;
197 : with-translation ( loc quot -- )
198 [ [ gl-translate ] dip call ] do-matrix ; inline
200 : fix-coordinates ( point1 point2 -- x1 y2 x2 y2 )
201 [ first2 [ >fixnum ] bi@ ] bi@ ;
203 : gl-set-clip ( loc dim -- )
204 fix-coordinates glScissor ;
206 : gl-viewport ( loc dim -- )
207 fix-coordinates glViewport ;
209 : init-matrices ( -- )
210 #! Leaves with matrix mode GL_MODELVIEW
211 GL_PROJECTION glMatrixMode
213 GL_MODELVIEW glMatrixMode