mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 11:18:54 +01:00
282 lines
6.4 KiB
Go
282 lines
6.4 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 ebiten_test
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import (
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. "github.com/hajimehoshi/ebiten"
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"image"
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"image/color"
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"image/draw"
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_ "image/png"
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"math"
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"testing"
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)
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var ebitenImageBin = ""
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func openImage(path string) (image.Image, error) {
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file, err := readFile(path)
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if err != nil {
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return nil, err
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}
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img, _, err := image.Decode(file)
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if err != nil {
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return nil, err
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}
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return img, nil
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}
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func openEbitenImage(path string) (*Image, image.Image, error) {
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img, err := openImage(path)
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if err != nil {
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return nil, nil, err
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}
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eimg, err := NewImageFromImage(img, FilterNearest)
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if err != nil {
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return nil, nil, err
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}
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return eimg, img, nil
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}
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func diff(x, y uint8) uint8 {
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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 TestImagePixels(t *testing.T) {
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img0, img, err := openEbitenImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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if got := img0.Bounds().Size(); got != img.Bounds().Size() {
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t.Errorf("img size: got %d; want %d", got, img.Bounds().Size())
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}
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for j := 0; j < img0.Bounds().Size().Y; j++ {
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for i := 0; i < img0.Bounds().Size().X; i++ {
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got := img0.At(i, j)
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want := color.RGBAModel.Convert(img.At(i, j))
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if got != want {
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t.Errorf("img0 At(%d, %d): got %#v; want %#v", 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 TestImageComposition(t *testing.T) {
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img2Color := color.NRGBA{0x24, 0x3f, 0x6a, 0x88}
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img3Color := color.NRGBA{0x85, 0xa3, 0x08, 0xd3}
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// TODO: Rename this to img0
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img1, _, err := openEbitenImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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w, h := img1.Bounds().Size().X, img1.Bounds().Size().Y
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img2, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img3, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img2.Fill(img2Color)
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img3.Fill(img3Color)
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img_12_3, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img2.DrawImage(img1, nil)
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img3.DrawImage(img2, nil)
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img_12_3.DrawImage(img3, nil)
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img2.Fill(img2Color)
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img3.Fill(img3Color)
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img_1_23, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img3.DrawImage(img2, nil)
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img3.DrawImage(img1, nil)
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img_1_23.DrawImage(img3, nil)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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c1 := img_12_3.At(i, j).(color.RGBA)
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c2 := img_1_23.At(i, j).(color.RGBA)
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if 1 < diff(c1.R, c2.R) || 1 < diff(c1.G, c2.G) || 1 < diff(c1.B, c2.B) || 1 < diff(c1.A, c2.A) {
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t.Errorf("img_12_3.At(%d, %d) = %#v; img_1_23.At(%[1]d, %[2]d) = %#[4]v", i, j, c1, c2)
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}
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if c1.A == 0 {
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t.Fatalf("img_12_3.At(%d, %d).A = 0; nothing is rendered?", i, j)
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}
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if c2.A == 0 {
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t.Fatalf("img_1_23.At(%d, %d).A = 0; nothing is rendered?", i, j)
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}
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}
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}
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}
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func TestImageSelf(t *testing.T) {
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img, _, err := openEbitenImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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if err := img.DrawImage(img, nil); err == nil {
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t.Fatalf("img.DrawImage(img, nil) doesn't return error; an error should be returned")
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}
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}
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func TestImageDotByDotInversion(t *testing.T) {
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img0, _, err := openEbitenImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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w, h := img0.Size()
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img1, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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op := &DrawImageOptions{}
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op.GeoM.Rotate(math.Pi)
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op.GeoM.Translate(float64(w), float64(h))
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img1.DrawImage(img0, op)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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c0 := img0.At(i, j).(color.RGBA)
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c1 := img1.At(w-i-1, h-j-1).(color.RGBA)
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if c0 != c1 {
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t.Errorf("img0.At(%[1]d, %[2]d) should equal to img1.At(%[3]d, %[4]d) but not: %[5]v vs %[6]v", i, j, w-i-1, h-j-1, c0, c1)
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}
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}
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}
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}
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func TestReplacePixels(t *testing.T) {
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origImg, err := openImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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// Convert to RGBA
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img := image.NewRGBA(origImg.Bounds())
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draw.Draw(img, img.Bounds(), origImg, image.ZP, draw.Src)
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size := img.Bounds().Size()
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img0, err := NewImage(size.X, size.Y, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img0.ReplacePixels(img.Pix)
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for j := 0; j < img0.Bounds().Size().Y; j++ {
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for i := 0; i < img0.Bounds().Size().X; i++ {
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got := img0.At(i, j)
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want := img.At(i, j)
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if got != want {
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t.Errorf("img0 At(%d, %d): got %#v; want %#v", i, j, got, want)
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}
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}
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}
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p := make([]uint8, 4*size.X*size.Y)
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for i, _ := range p {
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p[i] = 0x80
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}
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img0.ReplacePixels(p)
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for j := 0; j < img0.Bounds().Size().Y; j++ {
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for i := 0; i < img0.Bounds().Size().X; i++ {
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got := img0.At(i, j)
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want := color.RGBA{p[4*i], p[4*i+1], p[4*i+2], p[4*i+3]}
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if got != want {
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t.Errorf("img0 At(%d, %d): got %#v; want %#v", 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 TestImageDispose(t *testing.T) {
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img, err := NewImage(16, 16, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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if err := img.Dispose(); err != nil {
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t.Errorf("img.Dipose() returns error: %v", err)
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}
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}
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func min(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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func TestImageCompositionModeLighter(t *testing.T) {
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img0, _, err := openEbitenImage("testdata/ebiten.png")
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if err != nil {
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t.Fatal(err)
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return
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}
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w, h := img0.Size()
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img1, err := NewImage(w, h, FilterNearest)
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if err != nil {
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t.Fatal(err)
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return
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}
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img1.Fill(color.RGBA{0x01, 0x02, 0x03, 0x04})
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op := &DrawImageOptions{}
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op.CompositionMode = CompositionModeLighter
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img1.DrawImage(img0, op)
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for j := 0; j < img1.Bounds().Size().Y; j++ {
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for i := 0; i < img1.Bounds().Size().X; i++ {
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got := img1.At(i, j).(color.RGBA)
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want := img0.At(i, j).(color.RGBA)
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want.R = uint8(min(0xff, int(want.R)+1))
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want.G = uint8(min(0xff, int(want.G)+2))
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want.B = uint8(min(0xff, int(want.B)+3))
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want.A = uint8(min(0xff, int(want.A)+4))
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if got != want {
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t.Errorf("img1 At(%d, %d): got %#v; want %#v", i, j, got, want)
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}
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}
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}
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}
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// TODO: Add more tests (e.g. DrawImage with color matrix)
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