ebiten/internal/packing/packing_test.go
2018-03-11 01:13:53 +09:00

298 lines
5.7 KiB
Go

// Copyright 2018 The Ebiten Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package packing_test
import (
"testing"
. "github.com/hajimehoshi/ebiten/internal/packing"
)
func TestPage(t *testing.T) {
type Rect struct {
X int
Y int
Width int
Height int
}
type Op struct {
Width int
Height int
FreeNodeID int
}
cases := []struct {
Name string
In []Op
Out []*Rect
}{
{
Name: "alloc and random free",
In: []Op{
{100, 100, -1},
{100, 100, -1},
{100, 100, -1},
{100, 100, -1},
{100, 100, -1},
{100, 100, -1},
{0, 0, 1},
{0, 0, 3},
{0, 0, 5},
{0, 0, 0},
{0, 0, 2},
{0, 0, 4},
{1024, 1024, -1},
},
Out: []*Rect{
{0, 0, 100, 100},
{0, 100, 100, 100},
{0, 200, 100, 100},
{0, 300, 100, 100},
{0, 400, 100, 100},
{0, 500, 100, 100},
nil,
nil,
nil,
nil,
nil,
nil,
{0, 0, 1024, 1024},
},
},
{
Name: "alloc and free and empty",
In: []Op{
{31, 41, -1},
{59, 26, -1},
{53, 58, -1},
{97, 93, -1},
{28, 84, -1},
{62, 64, -1},
{0, 0, 0},
{0, 0, 1},
{0, 0, 2},
{0, 0, 3},
{0, 0, 4},
{0, 0, 5},
},
Out: []*Rect{
{0, 0, 31, 41},
{31, 0, 59, 26},
{31, 26, 53, 58},
{31, 84, 97, 93},
{0, 41, 28, 84},
{31, 177, 62, 64},
nil,
nil,
nil,
nil,
nil,
nil,
},
},
{
Name: "random Alloc",
In: []Op{
{100, 200, -1},
{1024, 1024, -1},
{100, 200, -1},
{50, 50, -1},
{200, 200, -1},
{1024, 1024, -1},
{500, 500, -1},
{600, 600, -1},
{100, 100, -1},
{0, 0, 2},
{100, 200, -1},
},
Out: []*Rect{
{0, 0, 100, 200},
nil,
{0, 200, 100, 200},
{0, 400, 50, 50},
{100, 0, 200, 200},
nil,
{100, 200, 500, 500},
nil,
{0, 450, 100, 100},
nil,
{0, 200, 100, 200},
},
},
{
Name: "fill squares",
In: []Op{
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
{256, 256, -1},
},
Out: []*Rect{
{0, 0, 256, 256},
{0, 256, 256, 256},
{0, 512, 256, 256},
{0, 768, 256, 256},
{256, 0, 256, 256},
{512, 0, 256, 256},
{768, 0, 256, 256},
{256, 256, 256, 256},
{256, 512, 256, 256},
{256, 768, 256, 256},
{512, 256, 256, 256},
{768, 256, 256, 256},
{512, 512, 256, 256},
{512, 768, 256, 256},
{768, 512, 256, 256},
{768, 768, 256, 256},
nil,
},
},
{
Name: "fill not fitting squares",
In: []Op{
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
{300, 300, -1},
},
Out: []*Rect{
{0, 0, 300, 300},
{0, 300, 300, 300},
{0, 600, 300, 300},
{300, 0, 300, 300},
{600, 0, 300, 300},
{300, 300, 300, 300},
{300, 600, 300, 300},
{600, 300, 300, 300},
{600, 600, 300, 300},
nil,
},
},
}
for _, c := range cases {
p := NewPage(1024, 1024)
nodes := []*Node{}
nnodes := 0
for i, in := range c.In {
if in.FreeNodeID == -1 {
n := p.Alloc(in.Width, in.Height)
nodes = append(nodes, n)
nnodes++
} else {
p.Free(nodes[in.FreeNodeID])
nodes = append(nodes, nil)
nnodes--
}
if nnodes < 0 {
panic("not reached")
}
if p.IsEmpty() != (nnodes == 0) {
t.Errorf("%s: nodes[%d]: page.IsEmpty(): got: %v, want: %v", c.Name, i, p.IsEmpty(), (nnodes == 0))
}
}
for i, out := range c.Out {
if nodes[i] == nil {
if out != nil {
t.Errorf("%s: nodes[%d]: should be nil but %v", c.Name, i, out)
}
continue
}
x, y, width, height := nodes[i].Region()
got := Rect{x, y, width, height}
if out == nil {
t.Errorf("%s: nodes[%d]: got: %v, want: %v", c.Name, i, got, nil)
continue
}
want := *out
if got != want {
t.Errorf("%s: nodes[%d]: got: %v, want: %v", c.Name, i, got, want)
}
}
}
}
func TestExtend(t *testing.T) {
p := NewPage(1024, 4096)
s := p.Size()
p.Alloc(s/2, s/2)
p.Extend()
if p.Size() != s*2 {
t.Errorf("p.Size(): got: %d, want: %d", p.Size(), s*2)
}
if p.Alloc(s*3/2, s*2) == nil {
t.Errorf("p.Alloc failed: width: %d, height: %d", s*3/2, s*2)
}
if p.Alloc(s/2, s*3/2) == nil {
t.Errorf("p.Alloc failed: width: %d, height: %d", s/2, s*3/2)
}
if p.Alloc(1, 1) != nil {
t.Errorf("p.Alloc must fail: width: %d, height: %d", 1, 1)
}
}
func TestExtend2(t *testing.T) {
p := NewPage(1024, 4096)
s := p.Size()
p.Alloc(s/2, s/2)
n1 := p.Alloc(s/2, s/2)
n2 := p.Alloc(s/2, s/2)
p.Alloc(s/2, s/2)
p.Free(n1)
p.Free(n2)
p.Extend()
if p.Size() != s*2 {
t.Errorf("p.Size(): got: %d, want: %d", p.Size(), s*2)
}
if p.Alloc(s, s*2) == nil {
t.Errorf("p.Alloc failed: width: %d, height: %d", s, s*2)
}
if p.Alloc(s, s) == nil {
t.Errorf("p.Alloc failed: width: %d, height: %d", s, s)
}
if p.Alloc(s, s) != nil {
t.Errorf("p.Alloc must fail: width: %d, height: %d", s, s)
}
}