mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-26 03:38:55 +01:00
132 lines
2.9 KiB
Go
132 lines
2.9 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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. "."
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"image"
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"image/color"
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_ "image/png"
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"os"
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"testing"
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)
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func openImage(path string) (*Image, image.Image, error) {
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file, err := os.Open(path)
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if err != nil {
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return nil, nil, err
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}
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defer file.Close()
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img, _, err := image.Decode(file)
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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 TestPixels(t *testing.T) {
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eimg, img, 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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if got := eimg.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 < eimg.Bounds().Size().Y; j++ {
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for i := 0; i < eimg.Bounds().Size().X; i++ {
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got := eimg.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("img 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 TestComposition(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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img1, _, 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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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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}
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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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