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be421aed AW |
1 | ;;; figl |
2 | ;;; Copyright (C) 2013 Andy Wingo <wingo@pobox.com> | |
1547f980 | 3 | ;;; Copyright (C) 2013 Daniel Hartwig <mandyke@gmail.com> |
be421aed AW |
4 | ;;; |
5 | ;;; Figl is free software: you can redistribute it and/or modify it | |
6 | ;;; under the terms of the GNU Lesser General Public License as | |
7 | ;;; published by the Free Software Foundation, either version 3 of the | |
8 | ;;; License, or (at your option) any later version. | |
9 | ;;; | |
10 | ;;; Figl is distributed in the hope that it will be useful, but WITHOUT | |
11 | ;;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | ;;; or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General | |
13 | ;;; Public License for more details. | |
14 | ;;; | |
15 | ;;; You should have received a copy of the GNU Lesser General Public | |
16 | ;;; License along with this program. If not, see | |
17 | ;;; <http://www.gnu.org/licenses/>. | |
18 | ||
19 | ;;; Commentary: | |
20 | ;; | |
21 | ;; OpenGL binding. | |
22 | ;; | |
23 | ;;; Code: | |
24 | ||
25 | (define-module (figl gl) | |
26 | #:use-module (figl runtime) | |
1547f980 DH |
27 | #:use-module (figl gl enums) |
28 | #:use-module ((figl gl low-level) #:renamer (symbol-prefix-proc '%))) | |
be421aed | 29 | |
1547f980 DH |
30 | ;; Notice there is no #:export clause. Exports are done inline to |
31 | ;; facilitate re-exporting low-level bindings (and changing that | |
32 | ;; choice), and identifying gaps in the API. | |
33 | ;; | |
34 | ;; There are two sets of exports for each section. The first is for | |
35 | ;; bindings defined in the specification, exported in order. The | |
36 | ;; second is for additional procedures not defined by the spec. but | |
37 | ;; relevant to the section, for example with-gl-begin. | |
38 | ;; | |
39 | ;; At least keep this format until the bindings are fairly complete. | |
40 | ||
41 | (module-use! (module-public-interface (current-module)) | |
42 | (resolve-interface '(figl gl enums))) | |
43 | ||
44 | ;;; | |
45 | ;;; 2.6 Begin/End Paradigm | |
46 | ;;; | |
47 | ||
48 | (define (gl-edge-flag flag) | |
49 | (%glEdgeFlag (if flag (boolean true) (boolean false)))) | |
50 | ||
8c6d5fbb DH |
51 | (re-export (%glBegin . gl-begin) |
52 | (%glEnd . gl-end)) | |
1547f980 DH |
53 | |
54 | (export gl-edge-flag) | |
55 | ||
56 | (define-syntax with-gl-begin ; terrible name | |
57 | (syntax-rules () | |
58 | ((_ mode body ...) | |
59 | (begin | |
8c6d5fbb | 60 | (gl-begin mode) |
1547f980 | 61 | body ... |
8c6d5fbb | 62 | (gl-end))))) |
1547f980 DH |
63 | |
64 | (export-syntax with-gl-begin) | |
65 | ||
66 | ;;; | |
67 | ;;; 2.7 Vertex Specification | |
68 | ;;; | |
69 | ||
70 | ;; Note that these are float variants only. This has implications for | |
71 | ;; some functions whose integer variants normalize their arguments. | |
72 | ;; The corresponding float variants expect normalized input, usually | |
73 | ;; in the range [0, 1]. Refer to the OpenGL specification for | |
74 | ;; details. | |
75 | ;; | |
76 | ;; For access to non-float variants please use the appropriate | |
77 | ;; low-level binding. | |
78 | ||
79 | ;; TODO: Maybe re-export packaged variants here. Unpacked byte | |
80 | ;; variants? | |
81 | ||
82 | (define* (gl-vertex x y #:optional (z 0.0) (w 1.0)) | |
83 | (%glVertex4f x y z w)) | |
84 | ||
85 | (define* (gl-tex-coord s #:optional (t 0.0) (r 0.0) (q 1.0)) | |
86 | (%glTexCoord4f s t r q)) | |
87 | ||
88 | (define* (gl-multi-tex-coord texture s #:optional (t 0.0) (r 0.0) (q 1.0)) | |
89 | (%glMultiTexCoord4f texture s t r q)) | |
90 | ||
91 | (define* (gl-color red green blue #:optional (alpha 1.0)) | |
92 | (%glColor4f red green blue alpha)) | |
93 | ||
94 | (define* (gl-vertex-attrib index x #:optional (y 0.0) (z 0.0) (w 1.0)) | |
95 | (%glVertexAttrib4f index x y z w)) | |
96 | ||
97 | (export gl-vertex | |
98 | gl-tex-coord | |
99 | gl-multi-tex-coord | |
100 | gl-color) | |
101 | ||
8c6d5fbb DH |
102 | (re-export (%glNormal3f . gl-normal) |
103 | (%glFogCoordf . gl-fog-coord) | |
104 | (%glSecondaryColor3f . gl-secondary-color) | |
105 | (%glIndexi . gl-index)) | |
1547f980 DH |
106 | |
107 | ;;; | |
108 | ;;; 2.10 Rectangles | |
109 | ;;; | |
110 | ||
8c6d5fbb | 111 | (re-export (%glRectf . gl-rectangle)) |
96e10a21 DH |
112 | |
113 | \f | |
114 | ;;; | |
115 | ;;; 2.11 Coordinate Transformation | |
116 | ;;; | |
117 | ||
118 | ;;; | |
119 | ;;; 2.11.1 Controlling the Viewport | |
120 | ;;; | |
121 | ||
8c6d5fbb DH |
122 | (re-export (%glDepthRange . gl-depth-range) |
123 | (%glViewport . gl-viewport)) | |
96e10a21 DH |
124 | |
125 | ;;; | |
126 | ;;; 2.11.2 Matrices | |
127 | ;;; | |
128 | ||
129 | ;; OpengGL matrices are stored in column-major order. This is | |
130 | ;; different to the usual row-major order used in 2-dimensional | |
131 | ;; arrays, which will have to be transposed as they loaded. | |
132 | ||
133 | (define* (gl-load-matrix m #:key (transpose #f)) | |
134 | ((if transpose | |
135 | %glLoadTransposeMatrixf | |
136 | %glLoadMatrixf) | |
137 | (array-contents m))) | |
138 | ||
139 | (define* (gl-multiply-matrix m #:key (transpose #f)) | |
140 | ((if transpose | |
141 | %glMultTransposeMatrixf | |
142 | %glMultMatrixf) | |
143 | (array-contents m))) | |
144 | ||
145 | (export gl-load-matrix | |
146 | gl-multiply-matrix) | |
147 | ||
8c6d5fbb DH |
148 | (re-export (%glMatrixMode . gl-matrix-mode) |
149 | (%glLoadIdentity . gl-load-identity) | |
150 | (%glRotatef . gl-rotate) | |
151 | (%glTranslatef . gl-translate) | |
152 | (%glScalef . gl-scale) | |
153 | (%glFrustum . gl-frustum) | |
154 | (%glOrtho . gl-ortho) | |
155 | (%glActiveTexture . set-gl-active-texture) | |
156 | (%glPushMatrix . gl-push-matrix) | |
157 | (%glPopMatrix . gl-pop-matrix)) | |
96e10a21 DH |
158 | |
159 | (define-syntax with-gl-push-matrix | |
160 | (syntax-rules () | |
161 | ((_ body ...) | |
162 | (begin | |
163 | (%glPushMatrix) | |
164 | body ... | |
165 | (%glPopMatrix))))) | |
166 | ||
167 | (export-syntax with-gl-push-matrix) | |
168 | ||
169 | ;;; | |
170 | ;;; 2.11.3 Normal Transformations | |
171 | ;;; | |
172 | ||
8c6d5fbb DH |
173 | (re-export (%glEnable . gl-enable) |
174 | (%glDisable . gl-disable)) |