mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 19:58:54 +01:00
4de807cc44
Signed-off-by: Pierre Curto <pierre.curto@gmail.com>
247 lines
5.3 KiB
Go
247 lines
5.3 KiB
Go
// Copyright 2014 Hajime Hoshi
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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 colorm_test
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import (
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"image/color"
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"math"
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"testing"
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"github.com/hajimehoshi/ebiten/v2/colorm"
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)
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func TestColorMInit(t *testing.T) {
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var m colorm.ColorM
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for i := 0; i < colorm.Dim-1; i++ {
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for j := 0; j < colorm.Dim; j++ {
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got := m.Element(i, j)
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want := 0.0
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if i == j {
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want = 1
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}
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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m.SetElement(0, 0, 1)
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for i := 0; i < colorm.Dim-1; i++ {
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for j := 0; j < colorm.Dim; j++ {
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got := m.Element(i, j)
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want := 0.0
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if i == j {
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want = 1
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}
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func TestColorMAssign(t *testing.T) {
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m := colorm.ColorM{}
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m.SetElement(0, 0, 1)
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m2 := m
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m.SetElement(0, 0, 0)
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got := m2.Element(0, 0)
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want := 1.0
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if want != got {
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t.Errorf("m2.Element(%d, %d) = %f, want %f", 0, 0, got, want)
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}
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}
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func TestColorMTranslate(t *testing.T) {
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expected := [4][5]float64{
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{1, 0, 0, 0, 0.5},
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{0, 1, 0, 0, 1.5},
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{0, 0, 1, 0, 2.5},
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{0, 0, 0, 1, 3.5},
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}
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m := colorm.ColorM{}
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m.Translate(0.5, 1.5, 2.5, 3.5)
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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got := m.Element(i, j)
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want := expected[i][j]
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func TestColorMScale(t *testing.T) {
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expected := [4][5]float64{
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{0.5, 0, 0, 0, 0},
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{0, 1.5, 0, 0, 0},
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{0, 0, 2.5, 0, 0},
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{0, 0, 0, 3.5, 0},
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}
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m := colorm.ColorM{}
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m.Scale(0.5, 1.5, 2.5, 3.5)
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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got := m.Element(i, j)
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want := expected[i][j]
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func TestColorMTranslateAndScale(t *testing.T) {
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expected := [4][5]float64{
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{1, 0, 0, 0, 0},
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{0, 1, 0, 0, 0},
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{0, 0, 1, 0, 0},
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{0, 0, 0, 0.5, 0.5},
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}
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m := colorm.ColorM{}
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m.Translate(0, 0, 0, 1)
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m.Scale(1, 1, 1, 0.5)
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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got := m.Element(i, j)
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want := expected[i][j]
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func TestColorMMonochrome(t *testing.T) {
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expected := [4][5]float64{
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{0.2990, 0.5870, 0.1140, 0, 0},
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{0.2990, 0.5870, 0.1140, 0, 0},
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{0.2990, 0.5870, 0.1140, 0, 0},
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{0, 0, 0, 1, 0},
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}
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m := colorm.ColorM{}
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m.ChangeHSV(0, 0, 1)
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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got := m.Element(i, j)
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want := expected[i][j]
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if math.Abs(want-got) > 0.0001 {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func TestColorMConcatSelf(t *testing.T) {
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expected := [4][5]float64{
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{30, 40, 30, 25, 30},
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{40, 54, 43, 37, 37},
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{30, 43, 51, 39, 34},
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{25, 37, 39, 46, 36},
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}
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m := colorm.ColorM{}
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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m.SetElement(i, j, float64((i+j)%5+1))
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}
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}
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m.Concat(m)
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for i := 0; i < 4; i++ {
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for j := 0; j < 5; j++ {
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got := m.Element(i, j)
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want := expected[i][j]
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if want != got {
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t.Errorf("m.Element(%d, %d) = %f, want %f", i, j, got, want)
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}
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}
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}
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}
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func absDiffU32(x, y uint32) uint32 {
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if x < y {
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return y - x
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}
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return x - y
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}
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func TestColorMApply(t *testing.T) {
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mono := colorm.ColorM{}
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mono.ChangeHSV(0, 0, 1)
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shiny := colorm.ColorM{}
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shiny.Translate(1, 1, 1, 0)
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shift := colorm.ColorM{}
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shift.Translate(0.5, 0.5, 0.5, 0.5)
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cases := []struct {
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ColorM colorm.ColorM
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In color.Color
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Out color.Color
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Delta uint32
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}{
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{
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ColorM: colorm.ColorM{},
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In: color.RGBA{R: 1, G: 2, B: 3, A: 4},
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Out: color.RGBA{R: 1, G: 2, B: 3, A: 4},
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Delta: 0x101,
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},
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{
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ColorM: mono,
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In: color.NRGBA{R: 0xff, G: 0xff, B: 0xff},
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Out: color.Transparent,
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Delta: 0x101,
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},
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{
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ColorM: mono,
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In: color.RGBA{R: 0xff, A: 0xff},
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Out: color.RGBA{R: 0x4c, G: 0x4c, B: 0x4c, A: 0xff},
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Delta: 0x101,
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},
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{
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ColorM: shiny,
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In: color.RGBA{R: 0x80, G: 0x90, B: 0xa0, A: 0xb0},
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Out: color.RGBA{R: 0xb0, G: 0xb0, B: 0xb0, A: 0xb0},
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Delta: 1,
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},
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{
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ColorM: shift,
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In: color.RGBA{},
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Out: color.RGBA{R: 0x40, G: 0x40, B: 0x40, A: 0x80},
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Delta: 0x101,
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},
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}
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for _, c := range cases {
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out := c.ColorM.Apply(c.In)
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r0, g0, b0, a0 := out.RGBA()
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r1, g1, b1, a1 := c.Out.RGBA()
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if absDiffU32(r0, r1) > c.Delta || absDiffU32(g0, g1) > c.Delta ||
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absDiffU32(b0, b1) > c.Delta || absDiffU32(a0, a1) > c.Delta {
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t.Errorf("%v.Apply(%v) = {%d, %d, %d, %d}, want {%d, %d, %d, %d}", c.ColorM, c.In, r0, g0, b0, a0, r1, g1, b1, a1)
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}
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}
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}
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// #1765
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func TestColorMConcat(t *testing.T) {
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var a, b colorm.ColorM
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a.SetElement(1, 2, -1)
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a.Concat(b)
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if got, want := a.Element(1, 2), -1.0; got != want {
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t.Errorf("got: %f, want: %f", got, want)
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}
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}
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