mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-09-20 05:12:18 +02:00
128 lines
2.2 KiB
Go
128 lines
2.2 KiB
Go
// Copyright 2022 The Ebitengine Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package shaderir_test
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import (
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"go/parser"
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"go/token"
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"testing"
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"github.com/hajimehoshi/ebiten/v2/internal/shader"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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)
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func compileToIR(src []byte) (*shaderir.Program, error) {
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fset := token.NewFileSet()
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f, err := parser.ParseFile(fset, "", src, parser.AllErrors)
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if err != nil {
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return nil, err
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}
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ir, err := shader.Compile(fset, f, "Vertex", "Fragment", 0)
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if err != nil {
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return nil, err
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}
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return ir, nil
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}
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func areIntSlicesEqual(a, b []int) bool {
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if len(a) != len(b) {
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return false
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}
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for i := range a {
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if a[i] != b[i] {
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return false
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}
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}
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return true
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}
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func TestReachableUniformVariablesFromBlock(t *testing.T) {
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src0 := `package main
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var U0 float
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var U1 float
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func F0() float {
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return U0
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}
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func F1() {
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a := U0
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_ = a
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}
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func F2() {
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}
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func F3() float {
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return F0()
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}
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func F4() float {
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return F0() + U1
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}
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func neverCalled() float {
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return U0 + U1
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}
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`
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cases := []struct {
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source string
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index int
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expected []int
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}{
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{
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source: src0,
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index: 0,
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expected: []int{0},
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},
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{
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source: src0,
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index: 1,
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expected: []int{0},
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},
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{
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source: src0,
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index: 2,
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expected: []int{},
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},
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{
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source: src0,
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index: 3,
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expected: []int{0},
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},
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{
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source: src0,
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index: 4,
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expected: []int{0, 1},
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},
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}
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for _, c := range cases {
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ir, err := compileToIR([]byte(c.source))
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if err != nil {
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t.Fatal(err)
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}
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got := ir.ReachableUniformVariablesFromBlock(ir.Funcs[c.index].Block)
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want := c.expected
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if !areIntSlicesEqual(got, want) {
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t.Errorf("test: %v, got: %v, want: %v", c, got, want)
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}
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}
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}
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