graphics: Add SGLSL module.

1 files changed, 99 insertions, 0 deletions

diff --git a/tests/sglsl.scm b/tests/sglsl.scm
new file mode 100644
index 0000000..fa41b1c
--- /dev/null
+++ b/tests/sglsl.scm
@@ -0,0 +1,99 @@
+;;; Chickadee Game Toolkit
+;;; Copyright © 2022 David Thompson <davet@gnu.org>
+;;;
+;;; Chickadee is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published
+;;; by the Free Software Foundation, either version 3 of the License,
+;;; or (at your option) any later version.
+;;;
+;;; Chickadee is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+;;; General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program.  If not, see
+;;; <http://www.gnu.org/licenses/>.
+
+(define-module (tests sglsl)
+  #:use-module (tests utils)
+  #:use-module (srfi srfi-64)
+  #:use-module (chickadee graphics sglsl))
+
+(define* (test-glsl name exp expected)
+  (test-equal name
+    (with-output-to-string (lambda () (sglsl->glsl exp)))
+    expected))
+
+(with-tests "sglsl"
+  (test-glsl "true" #true "true")
+  (test-glsl "false" #false "false")
+  (test-glsl "integers" 4 "4")
+  (test-glsl "floats" 4.5 "4.5")
+  (test-glsl "rationals->floats" 1/2 "0.5")
+  (test-glsl "+" '(+ 1 2) "(1+2)")
+  (test-glsl "-" '(- 2 1) "(2-1)")
+  (test-glsl "*" '(* 2 2) "(2*2)")
+  (test-glsl "/" '(/ 4 2) "(4/2)")
+  (test-glsl "=" '(= foo 1) "(foo=1)")
+  (test-glsl "+=" '(+= foo 2) "(foo+=2)")
+  (test-glsl "-=" '(-= foo 2) "(foo-=2)")
+  (test-glsl "*=" '(*= foo 2) "(foo*=2)")
+  (test-glsl "/=" '(/= foo 2) "(foo/=2)")
+  (test-glsl "==" '(== foo 1) "(foo==1)")
+  (test-glsl "!=" '(!= foo 1) "(foo!=1)")
+  (test-glsl ">" '(> foo 1) "(foo>1)")
+  (test-glsl ">=" '(>= foo 1) "(foo>=1)")
+  (test-glsl "<" '(< foo 1) "(foo<1)")
+  (test-glsl "<=" '(<= foo 1) "(foo<=1)")
+  (test-glsl "||" '(|| foo bar) "(foo||bar)")
+  (test-glsl "&&" '(&& foo bar) "(foo&&bar)")
+  (test-glsl "++" '(++ foo) "foo++")
+  (test-glsl "--" '(-- foo) "foo--")
+  (test-glsl "pre++" '(pre++ foo) "++foo")
+  (test-glsl "pre--" '(pre-- foo) "--foo")
+  (test-glsl "negation" '(! (|| foo bar)) "!(foo||bar)")
+  (test-glsl "break" 'break "break")
+  (test-glsl "continue" 'continue "continue")
+  (test-glsl "discard" 'discard "discard")
+  (test-glsl "if" '(if (== foo bar) 1)
+             "if((foo==bar)){1}")
+  (test-glsl "if/else" '(if (== foo bar) 1 2)
+             "if((foo==bar)){1}else{2}")
+  (test-glsl "ternary" '(? (== foo bar) 1 2)
+             "((foo==bar)?1:2)")
+  (test-glsl "for loop" '(for ((= i 0) (< i 10) (++ i)) (= (@ foo i) 0))
+             "for((i=0);(i<10);i++){(foo[i]=0);}")
+  (test-glsl "variable reference" 'foo "foo")
+  (test-glsl "struct dereference" '(-> foo bar baz) "foo.bar.baz")
+  (test-glsl "array dereference" '(@ foo 1 2) "foo[1][2]")
+  (test-glsl "struct+array dereference" '(@ (-> foo bar) 0) "foo.bar[0]")
+  (test-glsl "variable definition with initial value"
+             '(var float foo 1.2)
+             "float foo=1.2")
+  (test-glsl "variable definition with undefined value"
+             '(var float foo)
+             "float foo")
+  (test-glsl "variable definition with array dimensions"
+             '(var float (foo 4 4))
+             "float foo[4][4]")
+  (test-glsl "function definition"
+             '(function (float square (float x)) (return (* x x)))
+             "float square(float x){return (x*x);}")
+  (test-glsl "struct definition"
+             '(struct Light ((vec3 position) (vec3 direction)))
+             "struct Light{vec3 position;vec3 direction;}")
+  (test-glsl "constant definition" '(const float pi 3.14159)
+             "const float pi=3.14159")
+  (test-glsl "uniform declaration" '(uniform vec3 position)
+             "uniform vec3 position")
+  (test-glsl "uniform declaration with array dimensions"
+             '(uniform vec3 (position 2 3))
+             "uniform vec3 position[2][3]")
+  (test-glsl "input declaration" '(in vec3 position)
+             "in vec3 position")
+  (test-glsl "output declaration" '(out vec3 position)
+             "out vec3 position")
+  (test-glsl "function call" '(vec4 1 2 3 4) "vec4(1,2,3,4)")
+  (test-glsl "multiple expressions" '((++ foo) (-- bar))
+             "foo++;bar--;"))