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 continuations kernel libc math macros
6 namespaces math.vectors math.parser opengl.gl opengl.glu combinators
7 combinators.smart arrays sequences splitting words byte-arrays assocs
8 colors colors.constants accessors generalizations locals fry
9 specialized-arrays.float specialized-arrays.uint ;
12 : gl-color ( color -- ) >rgba-components glColor4d ; inline
14 : gl-clear-color ( color -- ) >rgba-components glClearColor ;
16 : gl-clear ( color -- )
17 gl-clear-color GL_COLOR_BUFFER_BIT glClear ;
20 glGetError dup zero? [
21 "GL error: " over gluErrorString append throw
24 : do-enabled ( what quot -- )
25 over glEnable dip glDisable ; inline
27 : do-enabled-client-state ( what quot -- )
28 over glEnableClientState dip glDisableClientState ; inline
30 : words>values ( word/value-seq -- value-seq )
33 : (all-enabled) ( seq quot -- )
34 over [ glEnable ] each dip [ glDisable ] each ; inline
36 : (all-enabled-client-state) ( seq quot -- )
37 [ dup [ glEnableClientState ] each ] dip
39 [ glDisableClientState ] each ; inline
41 MACRO: all-enabled ( seq quot -- )
42 [ words>values ] dip '[ _ _ (all-enabled) ] ;
44 MACRO: all-enabled-client-state ( seq quot -- )
45 [ words>values ] dip '[ _ _ (all-enabled-client-state) ] ;
47 : do-matrix ( quot -- )
48 glPushMatrix call glPopMatrix ; inline
50 : gl-material ( face pname params -- )
51 float-array{ } like glMaterialfv ;
53 : gl-vertex-pointer ( seq -- )
54 [ 2 GL_FLOAT 0 ] dip glVertexPointer ; inline
56 : gl-color-pointer ( seq -- )
57 [ 4 GL_FLOAT 0 ] dip glColorPointer ; inline
59 : gl-texture-coord-pointer ( seq -- )
60 [ 2 GL_FLOAT 0 ] dip glTexCoordPointer ; inline
62 : line-vertices ( a b -- )
63 [ first2 [ 0.5 + ] bi@ ] bi@ 4 float-array{ } nsequence
67 line-vertices GL_LINES 0 2 glDrawArrays ;
69 :: (rect-vertices) ( loc dim -- vertices )
70 #! We use GL_LINE_STRIP with a duplicated first vertex
71 #! instead of GL_LINE_LOOP to work around a bug in Apple's
78 x w + 0.3 - y h + 0.3 -
81 ] float-array{ } output>sequence ;
83 : rect-vertices ( loc dim -- )
84 (rect-vertices) gl-vertex-pointer ;
87 GL_LINE_STRIP 0 5 glDrawArrays ;
89 : gl-rect ( loc dim -- )
90 rect-vertices (gl-rect) ;
92 :: (fill-rect-vertices) ( loc dim -- vertices )
100 ] float-array{ } output>sequence ;
102 : fill-rect-vertices ( loc dim -- )
103 (fill-rect-vertices) gl-vertex-pointer ;
105 : (gl-fill-rect) ( -- )
106 GL_QUADS 0 4 glDrawArrays ;
108 : gl-fill-rect ( loc dim -- )
109 fill-rect-vertices (gl-fill-rect) ;
111 : do-attribs ( bits quot -- )
112 swap glPushAttrib call glPopAttrib ; inline
114 : (gen-gl-object) ( quot -- id )
115 [ 1 0 <uint> ] dip keep *uint ; inline
117 : gen-gl-buffer ( -- id )
118 [ glGenBuffers ] (gen-gl-object) ;
120 : (delete-gl-object) ( id quot -- )
121 [ 1 swap <uint> ] dip call ; inline
123 : delete-gl-buffer ( id -- )
124 [ glDeleteBuffers ] (delete-gl-object) ;
126 :: with-gl-buffer ( binding id quot -- )
127 binding id glBindBuffer
128 quot [ binding 0 glBindBuffer ] [ ] cleanup ; inline
130 : with-array-element-buffers ( array-buffer element-buffer quot -- )
131 [ GL_ELEMENT_ARRAY_BUFFER ] 2dip '[
132 GL_ARRAY_BUFFER swap _ with-gl-buffer
133 ] with-gl-buffer ; inline
135 : <gl-buffer> ( target data hint -- id )
138 [ [ byte-length ] keep ] dip glBufferData
142 : buffer-offset ( int -- alien )
145 : bind-texture-unit ( id target unit -- )
146 glActiveTexture swap glBindTexture gl-error ;
148 : (set-draw-buffers) ( buffers -- )
149 [ length ] [ >uint-array ] bi glDrawBuffers ;
151 MACRO: set-draw-buffers ( buffers -- )
152 words>values '[ _ (set-draw-buffers) ] ;
154 : gl-look-at ( eye focus up -- )
155 [ first3 ] tri@ gluLookAt ;
157 : gen-dlist ( -- id ) 1 glGenLists ;
159 : make-dlist ( type quot -- id )
160 [ gen-dlist ] 2dip '[ _ glNewList @ glEndList ] keep ; inline
162 : gl-translate ( point -- ) first2 0.0 glTranslated ;
164 : delete-dlist ( id -- ) 1 glDeleteLists ;
166 : with-translation ( loc quot -- )
167 [ [ gl-translate ] dip call ] do-matrix ; inline
169 : fix-coordinates ( point1 point2 -- x1 y2 x2 y2 )
170 [ first2 [ >fixnum ] bi@ ] bi@ ;
172 : gl-set-clip ( loc dim -- )
173 fix-coordinates glScissor ;
175 : gl-viewport ( loc dim -- )
176 fix-coordinates glViewport ;
178 : init-matrices ( -- )
179 #! Leaves with matrix mode GL_MODELVIEW
180 GL_PROJECTION glMatrixMode
182 GL_MODELVIEW glMatrixMode