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;;; 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--;"))
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