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
10 specialized-arrays.float specialized-arrays.uint ;
13 : gl-color ( color -- ) >rgba-components glColor4d ; inline
15 : gl-clear-color ( color -- ) >rgba-components glClearColor ;
17 : gl-clear ( color -- )
18 gl-clear-color GL_COLOR_BUFFER_BIT glClear ;
20 : error>string ( n -- string )
23 { HEX: 0501 "Invalid value" }
24 { HEX: 0500 "Invalid enumerant" }
25 { HEX: 0502 "Invalid operation" }
26 { HEX: 0503 "Stack overflow" }
27 { HEX: 0504 "Stack underflow" }
28 { HEX: 0505 "Out of memory" }
29 { HEX: 0506 "Invalid framebuffer operation" }
30 } at "Unknown error" or ;
32 TUPLE: gl-error function code string ;
34 : <gl-error> ( function code -- gl-error )
35 dup error>string \ gl-error boa ; inline
37 : gl-error-code ( -- code/f )
38 glGetError dup 0 = [ drop f ] when ; inline
40 : (gl-error) ( function -- )
41 gl-error-code [ <gl-error> throw ] [ drop ] if* ;
46 : do-enabled ( what quot -- )
47 over glEnable dip glDisable ; inline
49 : do-enabled-client-state ( what quot -- )
50 over glEnableClientState dip glDisableClientState ; inline
52 : words>values ( word/value-seq -- value-seq )
55 : (all-enabled) ( seq quot -- )
56 over [ glEnable ] each dip [ glDisable ] each ; inline
58 : (all-enabled-client-state) ( seq quot -- )
59 [ dup [ glEnableClientState ] each ] dip
61 [ glDisableClientState ] each ; inline
63 MACRO: all-enabled ( seq quot -- )
64 [ words>values ] dip '[ _ _ (all-enabled) ] ;
66 MACRO: all-enabled-client-state ( seq quot -- )
67 [ words>values ] dip '[ _ _ (all-enabled-client-state) ] ;
69 : do-matrix ( quot -- )
70 glPushMatrix call glPopMatrix ; inline
72 : gl-material ( face pname params -- )
73 float-array{ } like glMaterialfv ;
75 : gl-vertex-pointer ( seq -- )
76 [ 2 GL_FLOAT 0 ] dip glVertexPointer ; inline
78 : gl-color-pointer ( seq -- )
79 [ 4 GL_FLOAT 0 ] dip glColorPointer ; inline
81 : gl-texture-coord-pointer ( seq -- )
82 [ 2 GL_FLOAT 0 ] dip glTexCoordPointer ; inline
84 : line-vertices ( a b -- )
85 [ first2 [ 0.5 + ] bi@ ] bi@ 4 float-array{ } nsequence
89 line-vertices GL_LINES 0 2 glDrawArrays ;
91 :: (rect-vertices) ( loc dim -- vertices )
92 #! We use GL_LINE_STRIP with a duplicated first vertex
93 #! instead of GL_LINE_LOOP to work around a bug in Apple's
100 x w + 0.3 - y h + 0.3 -
103 ] float-array{ } output>sequence ;
105 : rect-vertices ( loc dim -- )
106 (rect-vertices) gl-vertex-pointer ;
109 GL_LINE_STRIP 0 5 glDrawArrays ;
111 : gl-rect ( loc dim -- )
112 rect-vertices (gl-rect) ;
114 :: (fill-rect-vertices) ( loc dim -- vertices )
122 ] float-array{ } output>sequence ;
124 : fill-rect-vertices ( loc dim -- )
125 (fill-rect-vertices) gl-vertex-pointer ;
127 : (gl-fill-rect) ( -- )
128 GL_QUADS 0 4 glDrawArrays ;
130 : gl-fill-rect ( loc dim -- )
131 fill-rect-vertices (gl-fill-rect) ;
133 : do-attribs ( bits quot -- )
134 swap glPushAttrib call glPopAttrib ; inline
136 : (gen-gl-object) ( quot -- id )
137 [ 1 0 <uint> ] dip keep *uint ; inline
139 : (delete-gl-object) ( id quot -- )
140 [ 1 swap <uint> ] dip call ; inline
142 : gen-gl-buffer ( -- id )
143 [ glGenBuffers ] (gen-gl-object) ;
145 : delete-gl-buffer ( id -- )
146 [ glDeleteBuffers ] (delete-gl-object) ;
148 :: with-gl-buffer ( binding id quot -- )
149 binding id glBindBuffer
150 quot [ binding 0 glBindBuffer ] [ ] cleanup ; inline
152 : with-array-element-buffers ( array-buffer element-buffer quot -- )
153 [ GL_ELEMENT_ARRAY_BUFFER ] 2dip '[
154 GL_ARRAY_BUFFER swap _ with-gl-buffer
155 ] with-gl-buffer ; inline
157 : gen-vertex-array ( -- id )
158 [ glGenVertexArrays ] (gen-gl-object) ;
160 : delete-vertex-array ( id -- )
161 [ glDeleteVertexArrays ] (delete-gl-object) ;
163 :: with-vertex-array ( id quot -- )
165 quot [ 0 glBindVertexArray ] [ ] cleanup ; inline
167 : <gl-buffer> ( target data hint -- id )
170 [ [ byte-length ] keep ] dip glBufferData
174 : buffer-offset ( int -- alien )
177 : bind-texture-unit ( id target unit -- )
178 glActiveTexture swap glBindTexture gl-error ;
180 : (set-draw-buffers) ( buffers -- )
181 [ length ] [ >uint-array ] bi glDrawBuffers ;
183 MACRO: set-draw-buffers ( buffers -- )
184 words>values '[ _ (set-draw-buffers) ] ;
186 : gen-dlist ( -- id ) 1 glGenLists ;
188 : make-dlist ( type quot -- id )
189 [ gen-dlist ] 2dip '[ _ glNewList @ glEndList ] keep ; inline
191 : gl-translate ( point -- ) first2 0.0 glTranslated ;
193 : delete-dlist ( id -- ) 1 glDeleteLists ;
195 : with-translation ( loc quot -- )
196 [ [ gl-translate ] dip call ] do-matrix ; inline
198 : fix-coordinates ( point1 point2 -- x1 y2 x2 y2 )
199 [ first2 [ >fixnum ] bi@ ] bi@ ;
201 : gl-set-clip ( loc dim -- )
202 fix-coordinates glScissor ;
204 : gl-viewport ( loc dim -- )
205 fix-coordinates glViewport ;
207 : init-matrices ( -- )
208 #! Leaves with matrix mode GL_MODELVIEW
209 GL_PROJECTION glMatrixMode
211 GL_MODELVIEW glMatrixMode