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graphics: Add TestImageEdge and remove examples/edge instead
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Hajime Hoshi
parent
9634794e7e
commit
6ccd27ee67
@ -1,115 +0,0 @@
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// Copyright 2017 The Ebiten 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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// +build example
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package main
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import (
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"fmt"
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"image/color"
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"log"
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"math"
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"github.com/hajimehoshi/ebiten"
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"github.com/hajimehoshi/ebiten/ebitenutil"
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)
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const (
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screenWidth = 320
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screenHeight = 240
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)
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var (
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colorImage *ebiten.Image
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colorImageWidth = 64
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colorImageHeight = 64
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angle = 0
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)
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type parts struct {
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image *ebiten.Image
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}
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func (p *parts) Len() int {
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return 1
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}
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func (p *parts) Src(index int) (int, int, int, int) {
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w, h := p.image.Size()
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return 0, 0, w, h / 2
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}
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func (p *parts) Dst(index int) (int, int, int, int) {
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w, h := p.image.Size()
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return 0, 0, w, h / 2
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}
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func update(screen *ebiten.Image) error {
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if ebiten.IsKeyPressed(ebiten.KeyLeft) {
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angle += 359
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}
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if ebiten.IsKeyPressed(ebiten.KeyRight) {
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angle++
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}
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angle %= 360
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if err := screen.Fill(color.White); err != nil {
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return err
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}
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op := &ebiten.DrawImageOptions{}
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op.ImageParts = &parts{colorImage}
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op.GeoM.Translate(-float64(colorImageWidth)/2, -float64(colorImageHeight)/2)
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op.GeoM.Rotate(float64(angle) * math.Pi / 180)
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op.GeoM.Scale(4, 4)
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op.GeoM.Translate(screenWidth/2, screenHeight/2)
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if err := screen.DrawImage(colorImage, op); err != nil {
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return err
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}
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if err := ebitenutil.DebugPrint(screen, fmt.Sprintf("Angle: %d [deg]", angle)); err != nil {
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return err
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}
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return nil
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}
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func main() {
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var err error
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colorImage, err = ebiten.NewImage(colorImageWidth, colorImageHeight, ebiten.FilterNearest)
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if err != nil {
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log.Fatal(err)
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}
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pixels := make([]uint8, 4*colorImageWidth*colorImageHeight)
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for j := 0; j < colorImageHeight; j++ {
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for i := 0; i < colorImageWidth; i++ {
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idx := 4 * (i + j*colorImageWidth)
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switch {
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case j < colorImageHeight/2:
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pixels[idx] = 0xff
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pixels[idx+1] = 0
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pixels[idx+2] = 0
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pixels[idx+3] = 0xff
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default:
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pixels[idx] = 0
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pixels[idx+1] = 0xff
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pixels[idx+2] = 0
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pixels[idx+3] = 0xff
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}
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}
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}
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if err := colorImage.ReplacePixels(pixels); err != nil {
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log.Fatal(err)
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}
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if err := ebiten.Run(update, screenWidth, screenHeight, 2, "Edge (Ebiten Demo)"); err != nil {
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log.Fatal(err)
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}
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}
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@ -563,3 +563,87 @@ func TestImageSize(t *testing.T) {
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}
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}
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}
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type halfImagePart struct {
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image *Image
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}
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func (p *halfImagePart) Len() int {
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return 1
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}
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func (p *halfImagePart) Src(index int) (int, int, int, int) {
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w, h := p.image.Size()
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return 0, 0, w, h / 2
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}
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func (p *halfImagePart) Dst(index int) (int, int, int, int) {
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w, h := p.image.Size()
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return 0, 0, w, h / 2
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}
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// Issue 317
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func TestImageEdge(t *testing.T) {
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const (
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img0Width = 16
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img0Height = 16
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img1Width = 32
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img1Height = 32
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)
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img0, err := NewImage(img0Width, img0Height, FilterNearest)
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if err != nil {
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t.Fatal(err)
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}
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pixels := make([]uint8, 4*img0Width*img0Height)
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for j := 0; j < img0Height; j++ {
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for i := 0; i < img0Width; i++ {
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idx := 4 * (i + j*img0Width)
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switch {
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case j < img0Height/2:
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pixels[idx] = 0xff
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pixels[idx+1] = 0
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pixels[idx+2] = 0
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pixels[idx+3] = 0xff
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default:
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pixels[idx] = 0
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pixels[idx+1] = 0xff
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pixels[idx+2] = 0
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pixels[idx+3] = 0xff
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}
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}
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}
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if err := img0.ReplacePixels(pixels); err != nil {
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t.Fatal(err)
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}
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img1, err := NewImage(img1Width, img1Height, FilterNearest)
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if err != nil {
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t.Fatal(err)
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}
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red := color.RGBA{0xff, 0, 0, 0xff}
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transparent := color.RGBA{0, 0, 0, 0}
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for a := 0; a < 360; a++ {
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if err := img1.Clear(); err != nil {
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t.Fatal(err)
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}
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op := &DrawImageOptions{}
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op.ImageParts = &halfImagePart{img0}
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op.GeoM.Translate(-float64(img0Width)/2, -float64(img0Height)/2)
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op.GeoM.Rotate(float64(a) * math.Pi / 180)
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op.GeoM.Translate(img1Width/2, img1Height/2)
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if err := img1.DrawImage(img0, op); err != nil {
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t.Fatal(err)
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}
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for j := 0; j < img1Height; j++ {
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for i := 0; i < img1Width; i++ {
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c := img1.At(i, j)
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if c == red {
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continue
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}
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if c == transparent {
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continue
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}
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t.Errorf("img1.At(%d, %d) want: red or transparent, got: %v", i, j, c)
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}
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}
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}
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}
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