ebiten/image_test.go

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// Copyright 2016 Hajime Hoshi
//
// 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 ebiten_test
import (
"bytes"
"fmt"
"image"
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"image/color"
"image/draw"
_ "image/png"
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"math"
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"math/rand/v2"
"runtime"
"testing"
"github.com/hajimehoshi/ebiten/v2"
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"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
t "github.com/hajimehoshi/ebiten/v2/internal/testing"
"github.com/hajimehoshi/ebiten/v2/internal/ui"
)
// maxImageSize is a maximum image size that should work in almost every environment.
const maxImageSize = 4096 - 2
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func skipTooSlowTests(t *testing.T) bool {
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if testing.Short() {
t.Skip("skipping test in short mode")
return true
}
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if runtime.GOOS == "js" {
t.Skip("too slow or fragile on Wasm")
return true
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}
return false
}
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func TestMain(m *testing.M) {
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ui.SetPanicOnErrorOnReadingPixelsForTesting(true)
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t.MainWithRunLoop(m)
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}
func openEbitenImage() (*ebiten.Image, image.Image, error) {
img, _, err := image.Decode(bytes.NewReader(images.Ebiten_png))
if err != nil {
return nil, nil, err
}
eimg := ebiten.NewImageFromImage(img)
return eimg, img, nil
}
func abs(x int) int {
if x < 0 {
return -x
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}
return x
}
// sameColors compares c1 and c2 and returns a boolean value indicating
// if the two colors are (almost) same.
//
// Pixels read from GPU might include errors (#492), and
// sameColors considers such errors as delta.
func sameColors(c1, c2 color.RGBA, delta int) bool {
return abs(int(c1.R)-int(c2.R)) <= delta &&
abs(int(c1.G)-int(c2.G)) <= delta &&
abs(int(c1.B)-int(c2.B)) <= delta &&
abs(int(c1.A)-int(c2.A)) <= delta
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}
func TestImagePixels(t *testing.T) {
img0, img, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
if got := img0.Bounds().Size(); got != img.Bounds().Size() {
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t.Fatalf("img size: got %d; want %d", got, img.Bounds().Size())
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}
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
// Check out of range part
w2, h2 := graphics.InternalImageSize(w), graphics.InternalImageSize(h)
for j := -100; j < h2+100; j++ {
for i := -100; i < w2+100; i++ {
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got := img0.At(i, j)
want := color.RGBAModel.Convert(img.At(i, j))
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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}
}
}
pix := make([]byte, 4*w*h)
img0.ReadPixels(pix)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (j*w + i)
got := color.RGBA{R: pix[idx], G: pix[idx+1], B: pix[idx+2], A: pix[idx+3]}
want := color.RGBAModel.Convert(img.At(i, j))
if got != want {
t.Errorf("(%d, %d): got %v; want %v", i, j, got, want)
}
}
}
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}
func TestImageComposition(t *testing.T) {
img2Color := color.NRGBA{R: 0x24, G: 0x3f, B: 0x6a, A: 0x88}
img3Color := color.NRGBA{R: 0x85, G: 0xa3, B: 0x08, A: 0xd3}
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// TODO: Rename this to img0
img1, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
w, h := img1.Bounds().Dx(), img1.Bounds().Dy()
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img2 := ebiten.NewImage(w, h)
img3 := ebiten.NewImage(w, h)
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img2.Fill(img2Color)
img3.Fill(img3Color)
img_12_3 := ebiten.NewImage(w, h)
img2.DrawImage(img1, nil)
img3.DrawImage(img2, nil)
img_12_3.DrawImage(img3, nil)
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img2.Fill(img2Color)
img3.Fill(img3Color)
img_1_23 := ebiten.NewImage(w, h)
img3.DrawImage(img2, nil)
img3.DrawImage(img1, nil)
img_1_23.DrawImage(img3, nil)
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for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
c1 := img_12_3.At(i, j).(color.RGBA)
c2 := img_1_23.At(i, j).(color.RGBA)
if !sameColors(c1, c2, 1) {
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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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}
if c1.A == 0 {
t.Fatalf("img_12_3.At(%d, %d).A = 0; nothing is rendered?", i, j)
}
if c2.A == 0 {
t.Fatalf("img_1_23.At(%d, %d).A = 0; nothing is rendered?", i, j)
}
}
}
}
func TestImageSelf(t *testing.T) {
// Note that mutex usages: without defer, unlocking is not called when panicking.
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawImage must panic but not")
}
}()
img, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
img.DrawImage(img, nil)
}
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func TestImageScale(t *testing.T) {
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for _, scale := range []int{2, 3, 4} {
img0, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
img1 := ebiten.NewImage(w*scale, h*scale)
op := &ebiten.DrawImageOptions{}
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op.GeoM.Scale(float64(scale), float64(scale))
img1.DrawImage(img0, op)
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for j := 0; j < h*scale; j++ {
for i := 0; i < w*scale; i++ {
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c0 := img0.At(i/scale, j/scale).(color.RGBA)
c1 := img1.At(i, j).(color.RGBA)
if c0 != c1 {
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t.Fatalf("img0.At(%[1]d, %[2]d) should equal to img1.At(%[3]d, %[4]d) (with scale %[5]d) but not: %[6]v vs %[7]v", i/2, j/2, i, j, scale, c0, c1)
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}
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}
}
}
}
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func TestImage90DegreeRotate(t *testing.T) {
img0, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
img1 := ebiten.NewImage(h, w)
op := &ebiten.DrawImageOptions{}
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op.GeoM.Rotate(math.Pi / 2)
op.GeoM.Translate(float64(h), 0)
img1.DrawImage(img0, op)
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for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
c0 := img0.At(i, j).(color.RGBA)
c1 := img1.At(h-j-1, i).(color.RGBA)
if c0 != c1 {
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, h-j-1, i, c0, c1)
}
}
}
}
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func TestImageDotByDotInversion(t *testing.T) {
img0, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
img1 := ebiten.NewImage(w, h)
op := &ebiten.DrawImageOptions{}
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op.GeoM.Rotate(math.Pi)
op.GeoM.Translate(float64(w), float64(h))
img1.DrawImage(img0, op)
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for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
c0 := img0.At(i, j).(color.RGBA)
c1 := img1.At(w-i-1, h-j-1).(color.RGBA)
if c0 != c1 {
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)
}
}
}
}
func TestImageWritePixels(t *testing.T) {
// Create a dummy image so that the shared texture is used and origImg's position is shifted.
dummyImg := ebiten.NewImageFromImage(image.NewRGBA(image.Rect(0, 0, 16, 16)))
defer dummyImg.Deallocate()
_, origImg, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
// Convert to *image.RGBA just in case.
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img := image.NewRGBA(origImg.Bounds())
draw.Draw(img, img.Bounds(), origImg, image.ZP, draw.Src)
size := img.Bounds().Size()
img0 := ebiten.NewImage(size.X, size.Y)
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img0.WritePixels(img.Pix)
for j := 0; j < img0.Bounds().Dy(); j++ {
for i := 0; i < img0.Bounds().Dx(); i++ {
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got := img0.At(i, j)
want := img.At(i, j)
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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}
}
}
p := make([]uint8, 4*size.X*size.Y)
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for i := range p {
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p[i] = 0x80
}
img0.WritePixels(p)
// Even if p is changed after calling ReplacePixel, img0 uses the original values.
for i := range p {
p[i] = 0
}
for j := 0; j < img0.Bounds().Dy(); j++ {
for i := 0; i < img0.Bounds().Dx(); i++ {
got := img0.At(i, j)
want := color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}
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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}
func TestImageWritePixelsNil(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("WritePixels(nil) must panic")
}
}()
img := ebiten.NewImage(16, 16)
img.Fill(color.White)
img.WritePixels(nil)
}
func TestImageDispose(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Fill(color.White)
img.Dispose()
// The color is transparent (color.RGBA{}).
// Note that the value's type must be color.RGBA.
got := img.At(0, 0)
want := color.RGBA{}
if got != want {
t.Errorf("img.At(0, 0) got: %v, want: %v", got, want)
}
}
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func TestImageDeallocate(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Fill(color.White)
img.Deallocate()
// The color is transparent (color.RGBA{}).
got := img.At(0, 0)
want := color.RGBA{}
if got != want {
t.Errorf("img.At(0, 0) got: %v, want: %v", got, want)
}
}
func TestImageBlendLighter(t *testing.T) {
img0, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
img1 := ebiten.NewImage(w, h)
img1.Fill(color.RGBA{R: 0x01, G: 0x02, B: 0x03, A: 0x04})
op := &ebiten.DrawImageOptions{}
op.Blend = ebiten.BlendLighter
img1.DrawImage(img0, op)
for j := 0; j < img1.Bounds().Dy(); j++ {
for i := 0; i < img1.Bounds().Dx(); i++ {
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got := img1.At(i, j).(color.RGBA)
want := img0.At(i, j).(color.RGBA)
want.R = uint8(min(0xff, int(want.R)+1))
want.G = uint8(min(0xff, int(want.G)+2))
want.B = uint8(min(0xff, int(want.B)+3))
want.A = uint8(min(0xff, int(want.A)+4))
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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}
}
}
}
func TestNewImageFromEbitenImage(t *testing.T) {
img, _, err := openEbitenImage()
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if err != nil {
t.Fatal(err)
return
}
_ = ebiten.NewImageFromImage(img)
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}
func TestNewImageFromSubImage(t *testing.T) {
_, img, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img.Bounds().Dx(), img.Bounds().Dy()
subImg := img.(*image.NRGBA).SubImage(image.Rect(1, 1, w-1, h-1))
eimg := ebiten.NewImageFromImage(subImg)
sw, sh := subImg.Bounds().Dx(), subImg.Bounds().Dy()
w2, h2 := eimg.Bounds().Dx(), eimg.Bounds().Dy()
if w2 != sw {
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t.Errorf("eimg Width: got %v; want %v", w2, sw)
}
if h2 != sh {
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t.Errorf("eimg Width: got %v; want %v", h2, sh)
}
for j := 0; j < h2; j++ {
for i := 0; i < w2; i++ {
got := eimg.At(i, j)
want := color.RGBAModel.Convert(img.At(i+1, j+1))
if got != want {
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t.Errorf("img0 At(%d, %d): got %v; want %v", i, j, got, want)
}
}
}
}
type mutableRGBA struct {
r, g, b, a uint8
}
func (c *mutableRGBA) RGBA() (r, g, b, a uint32) {
return uint32(c.r) * 0x101, uint32(c.g) * 0x101, uint32(c.b) * 0x101, uint32(c.a) * 0x101
}
func TestImageFill(t *testing.T) {
w, h := 10, 10
img := ebiten.NewImage(w, h)
clr := &mutableRGBA{0x80, 0x80, 0x80, 0x80}
img.Fill(clr)
clr.r = 0
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}
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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// Issue #740
func TestImageClear(t *testing.T) {
const w, h = 128, 256
img := ebiten.NewImage(w, h)
img.Fill(color.White)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
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t.Errorf("img At(%d, %d): got %v; want %v", i, j, got, want)
}
}
}
img.Clear()
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img.At(i, j)
want := color.RGBA{}
if got != want {
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t.Errorf("img At(%d, %d): got %v; want %v", i, j, got, want)
}
}
}
}
// Issue #317, #558, #724
func TestImageEdge(t *testing.T) {
// TODO: This test is not so meaningful after #1218. Do we remove this?
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if skipTooSlowTests(t) {
return
}
const (
img0Width = 10
img0Height = 10
img0InnerWidth = 10
img0InnerHeight = 10
img1Width = 32
img1Height = 32
)
img0 := ebiten.NewImage(img0Width, img0Height)
pixels := make([]uint8, 4*img0Width*img0Height)
for j := 0; j < img0Height; j++ {
for i := 0; i < img0Width; i++ {
idx := 4 * (i + j*img0Width)
pixels[idx] = 0xff
pixels[idx+1] = 0
pixels[idx+2] = 0
pixels[idx+3] = 0xff
}
}
img0.WritePixels(pixels)
img1 := ebiten.NewImage(img1Width, img1Height)
red := color.RGBA{R: 0xff, A: 0xff}
transparent := color.RGBA{}
angles := []float64{}
for a := 0; a < 1440; a++ {
angles = append(angles, float64(a)/1440*2*math.Pi)
}
for a := 0; a < 4096; a += 3 {
// a++ should be fine, but it takes long to test.
angles = append(angles, float64(a)/4096*2*math.Pi)
}
for _, s := range []float64{1, 0.5, 0.25} {
for _, f := range []ebiten.Filter{ebiten.FilterNearest, ebiten.FilterLinear} {
for _, a := range angles {
for _, testDrawTriangles := range []bool{false, true} {
img1.Clear()
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
b := img0.Bounds()
var geo ebiten.GeoM
geo.Translate(-float64(w)/2, -float64(h)/2)
geo.Scale(s, s)
geo.Rotate(a)
geo.Translate(img1Width/2, img1Height/2)
if !testDrawTriangles {
op := &ebiten.DrawImageOptions{}
op.GeoM = geo
op.Filter = f
img1.DrawImage(img0, op)
} else {
op := &ebiten.DrawTrianglesOptions{}
dx0, dy0 := geo.Apply(0, 0)
dx1, dy1 := geo.Apply(float64(w), 0)
dx2, dy2 := geo.Apply(0, float64(h))
dx3, dy3 := geo.Apply(float64(w), float64(h))
vs := []ebiten.Vertex{
{
DstX: float32(dx0),
DstY: float32(dy0),
SrcX: float32(b.Min.X),
SrcY: float32(b.Min.Y),
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: float32(dx1),
DstY: float32(dy1),
SrcX: float32(b.Max.X),
SrcY: float32(b.Min.Y),
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: float32(dx2),
DstY: float32(dy2),
SrcX: float32(b.Min.X),
SrcY: float32(b.Max.Y),
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: float32(dx3),
DstY: float32(dy3),
SrcX: float32(b.Max.X),
SrcY: float32(b.Max.Y),
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
op.Filter = f
img1.DrawTriangles(vs, is, img0, op)
}
allTransparent := true
for j := 0; j < img1Height; j++ {
for i := 0; i < img1Width; i++ {
c := img1.At(i, j)
if c == transparent {
continue
}
allTransparent = false
switch f {
case ebiten.FilterNearest:
if c == red {
continue
}
case ebiten.FilterLinear:
if _, g, b, _ := c.RGBA(); g == 0 && b == 0 {
continue
}
}
t.Fatalf("img1.At(%d, %d) (filter: %d, scale: %f, angle: %f, draw-triangles?: %t) want: red or transparent, got: %v", i, j, f, s, a, testDrawTriangles, c)
}
}
if allTransparent {
t.Fatalf("img1 (filter: %d, scale: %f, angle: %f, draw-triangles?: %t) is transparent but should not", f, s, a, testDrawTriangles)
}
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}
}
}
}
}
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// Issue #419
func TestImageTooManyFill(t *testing.T) {
const width = 1024
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indexToColor := func(index int) uint8 {
return uint8((17*index + 0x40) % 256)
}
src := ebiten.NewImage(1, 1)
dst := ebiten.NewImage(width, 1)
for i := 0; i < width; i++ {
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c := indexToColor(i)
src.Fill(color.RGBA{R: c, G: c, B: c, A: 0xff})
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(i), 0)
dst.DrawImage(src, op)
}
for i := 0; i < width; i++ {
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c := indexToColor(i)
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got := dst.At(i, 0).(color.RGBA)
want := color.RGBA{R: c, G: c, B: c, A: 0xff}
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if !sameColors(got, want, 1) {
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t.Errorf("dst.At(%d, %d): got %v, want: %v", i, 0, got, want)
}
}
}
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func BenchmarkDrawImage(b *testing.B) {
img0 := ebiten.NewImage(16, 16)
img1 := ebiten.NewImage(16, 16)
op := &ebiten.DrawImageOptions{}
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for i := 0; i < b.N; i++ {
img0.DrawImage(img1, op)
}
}
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func BenchmarkDrawTriangles(b *testing.B) {
const w, h = 16, 16
img0 := ebiten.NewImage(w, h)
img1 := ebiten.NewImage(w, h)
op := &ebiten.DrawTrianglesOptions{}
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
for i := 0; i < b.N; i++ {
img0.DrawTriangles(vs, is, img1, op)
}
}
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func TestImageLinearGraduation(t *testing.T) {
img0 := ebiten.NewImage(2, 2)
img0.WritePixels([]byte{
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0xff, 0x00, 0x00, 0xff,
0x00, 0xff, 0x00, 0xff,
0x00, 0x00, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
})
const w, h = 32, 32
img1 := ebiten.NewImage(w, h)
op := &ebiten.DrawImageOptions{}
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op.GeoM.Scale(w, h)
op.GeoM.Translate(-w/4, -h/4)
op.Filter = ebiten.FilterLinear
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img1.DrawImage(img0, op)
for j := 1; j < h-1; j++ {
for i := 1; i < w-1; i++ {
c := img1.At(i, j).(color.RGBA)
if c.R == 0 || c.R == 0xff {
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t.Errorf("img1.At(%d, %d).R must be in between 0x01 and 0xfe but %v", i, j, c)
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}
}
}
}
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func TestImageOutside(t *testing.T) {
src := ebiten.NewImage(5, 10) // internal texture size is 8x16.
dst := ebiten.NewImage(4, 4)
src.Fill(color.RGBA{R: 0xff, A: 0xff})
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cases := []struct {
X, Y, Width, Height int
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}{
{-4, -4, 4, 4},
{5, 0, 4, 4},
{0, 10, 4, 4},
{5, 10, 4, 4},
{8, 0, 4, 4},
{0, 16, 4, 4},
{8, 16, 4, 4},
{8, -4, 4, 4},
{-4, 16, 4, 4},
{5, 10, 0, 0},
{5, 10, -2, -2}, // non-well-formed rectangle
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}
for _, c := range cases {
dst.Clear()
op := &ebiten.DrawImageOptions{}
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op.GeoM.Translate(0, 0)
dst.DrawImage(src.SubImage(image.Rectangle{
Min: image.Pt(c.X, c.Y),
Max: image.Pt(c.X+c.Width, c.Y+c.Height),
}).(*ebiten.Image), op)
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for j := 0; j < 4; j++ {
for i := 0; i < 4; i++ {
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got := dst.At(i, j).(color.RGBA)
want := color.RGBA{}
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if got != want {
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t.Errorf("src(x: %d, y: %d, w: %d, h: %d), dst At(%d, %d): got %v, want: %v", c.X, c.Y, c.Width, c.Height, i, j, got, want)
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}
}
}
}
}
func TestImageOutsideUpperLeft(t *testing.T) {
src := ebiten.NewImage(4, 4)
dst1 := ebiten.NewImage(16, 16)
dst2 := ebiten.NewImage(16, 16)
src.Fill(color.RGBA{R: 0xff, A: 0xff})
op := &ebiten.DrawImageOptions{}
op.GeoM.Rotate(math.Pi / 4)
dst1.DrawImage(src.SubImage(image.Rect(-4, -4, 8, 8)).(*ebiten.Image), op)
op = &ebiten.DrawImageOptions{}
op.GeoM.Rotate(math.Pi / 4)
dst2.DrawImage(src, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
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got := dst1.At(i, j).(color.RGBA)
want := dst2.At(i, j).(color.RGBA)
if got != want {
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t.Errorf("got: dst1.At(%d, %d): %v, want: dst2.At(%d, %d): %v", i, j, got, i, j, want)
}
}
}
}
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func TestImageSize(t *testing.T) {
const (
w = 17
h = 31
)
img := ebiten.NewImage(w, h)
gotW, gotH := img.Bounds().Dx(), img.Bounds().Dy()
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if gotW != w {
t.Errorf("got: %d, want: %d", gotW, w)
}
if gotH != h {
t.Errorf("got: %d, want: %d", gotH, h)
}
}
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func TestImageSize1(t *testing.T) {
src := ebiten.NewImage(1, 1)
dst := ebiten.NewImage(1, 1)
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src.Fill(color.White)
dst.DrawImage(src, nil)
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got := src.At(0, 0).(color.RGBA)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
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if !sameColors(got, want, 1) {
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t.Errorf("got: %v, want: %v", got, want)
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}
}
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// TODO: Enable this test again. This test fails after #1217 is fixed.
func Skip_TestImageSize4096(t *testing.T) {
src := ebiten.NewImage(4096, 4096)
dst := ebiten.NewImage(4096, 4096)
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pix := make([]byte, 4096*4096*4)
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for i := 0; i < 4096; i++ {
j := 4095
idx := 4 * (i + j*4096)
pix[idx] = uint8(i + j)
pix[idx+1] = uint8((i + j) >> 8)
pix[idx+2] = uint8((i + j) >> 16)
pix[idx+3] = 0xff
}
for j := 0; j < 4096; j++ {
i := 4095
idx := 4 * (i + j*4096)
pix[idx] = uint8(i + j)
pix[idx+1] = uint8((i + j) >> 8)
pix[idx+2] = uint8((i + j) >> 16)
pix[idx+3] = 0xff
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}
src.WritePixels(pix)
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dst.DrawImage(src, nil)
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for i := 4095; i < 4096; i++ {
j := 4095
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got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: uint8(i + j), G: uint8((i + j) >> 8), B: uint8((i + j) >> 16), A: 0xff}
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if got != want {
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t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
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for j := 4095; j < 4096; j++ {
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i := 4095
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got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: uint8(i + j), G: uint8((i + j) >> 8), B: uint8((i + j) >> 16), A: 0xff}
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if got != want {
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t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
}
}
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func TestImageCopy(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("copying image and using it must panic")
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}
}()
img0 := ebiten.NewImage(256, 256)
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img1 := *img0
img1.Fill(color.Transparent)
}
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// Issue #611, #907
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func TestImageStretch(t *testing.T) {
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if skipTooSlowTests(t) {
return
}
const w = 16
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dst := ebiten.NewImage(w, maxImageSize)
loop:
for h := 1; h <= 32; h++ {
src := ebiten.NewImage(w+2, h+2)
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pix := make([]byte, 4*(w+2)*(h+2))
for i := 0; i < (w+2)*(h+2); i++ {
pix[4*i] = 0xff
pix[4*i+3] = 0xff
}
src.WritePixels(pix)
dh := dst.Bounds().Dy()
for i := 0; i < dh; {
dst.Clear()
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(1, float64(i)/float64(h))
dst.DrawImage(src.SubImage(image.Rect(1, 1, w+1, h+1)).(*ebiten.Image), op)
for j := -1; j <= 1; j++ {
if i+j < 0 {
continue
}
got := dst.At(0, i+j).(color.RGBA)
want := color.RGBA{}
if j < 0 {
want = color.RGBA{R: 0xff, A: 0xff}
}
if got != want {
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t.Errorf("At(%d, %d) (height=%d, scale=%d/%d): got: %v, want: %v", 0, i+j, h, i, h, got, want)
continue loop
}
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}
switch i % 32 {
case 31, 0:
i++
case 1:
i += 32 - 2
default:
panic("not reached")
}
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}
}
}
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func TestImageSprites(t *testing.T) {
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const (
width = 512
height = 512
)
src := ebiten.NewImage(4, 4)
src.Fill(color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
dst := ebiten.NewImage(width, height)
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for j := 0; j < height/4; j++ {
for i := 0; i < width/4; i++ {
op := &ebiten.DrawImageOptions{}
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op.GeoM.Translate(float64(i*4), float64(j*4))
dst.DrawImage(src, op)
}
}
for j := 0; j < height/4; j++ {
for i := 0; i < width/4; i++ {
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got := dst.At(i*4, j*4).(color.RGBA)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
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if !sameColors(got, want, 1) {
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t.Errorf("dst.At(%d, %d): got %v, want: %v", i*4, j*4, got, want)
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}
}
}
}
// Disabled: it does not make sense to expect deterministic mipmap results (#909).
func Disabled_TestImageMipmap(t *testing.T) {
src, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := src.Bounds().Dx(), src.Bounds().Dy()
l1 := ebiten.NewImage(w/2, h/2)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(1/2.0, 1/2.0)
op.Filter = ebiten.FilterLinear
l1.DrawImage(src, op)
l1w, l1h := l1.Bounds().Dx(), l1.Bounds().Dy()
l2 := ebiten.NewImage(l1w/2, l1h/2)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(1/2.0, 1/2.0)
op.Filter = ebiten.FilterLinear
l2.DrawImage(l1, op)
gotDst := ebiten.NewImage(w, h)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(1/5.0, 1/5.0)
op.Filter = ebiten.FilterLinear
gotDst.DrawImage(src, op)
wantDst := ebiten.NewImage(w, h)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(4.0/5.0, 4.0/5.0)
op.Filter = ebiten.FilterLinear
wantDst.DrawImage(l2, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := gotDst.At(i, j).(color.RGBA)
want := wantDst.At(i, j).(color.RGBA)
if !sameColors(got, want, 1) {
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t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
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// Disabled: it does not make sense to expect deterministic mipmap results (#909).
func Disabled_TestImageMipmapNegativeDet(t *testing.T) {
src, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := src.Bounds().Dx(), src.Bounds().Dy()
l1 := ebiten.NewImage(w/2, h/2)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(1/2.0, 1/2.0)
op.Filter = ebiten.FilterLinear
l1.DrawImage(src, op)
l1w, l1h := l1.Bounds().Dx(), l1.Bounds().Dy()
l2 := ebiten.NewImage(l1w/2, l1h/2)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(1/2.0, 1/2.0)
op.Filter = ebiten.FilterLinear
l2.DrawImage(l1, op)
gotDst := ebiten.NewImage(w, h)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(-1/5.0, -1/5.0)
op.GeoM.Translate(float64(w), float64(h))
op.Filter = ebiten.FilterLinear
gotDst.DrawImage(src, op)
wantDst := ebiten.NewImage(w, h)
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(-4.0/5.0, -4.0/5.0)
op.GeoM.Translate(float64(w), float64(h))
op.Filter = ebiten.FilterLinear
wantDst.DrawImage(l2, op)
allZero := true
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := gotDst.At(i, j).(color.RGBA)
want := wantDst.At(i, j).(color.RGBA)
if !sameColors(got, want, 1) {
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t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
if got.A > 0 {
allZero = false
}
}
}
if allZero {
t.Errorf("the image must include non-zero values but not")
}
}
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// Issue #710
2018-11-08 17:58:41 +01:00
func TestImageMipmapColor(t *testing.T) {
img0 := ebiten.NewImage(256, 256)
img1 := ebiten.NewImage(128, 128)
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img1.Fill(color.White)
for i := 0; i < 8; i++ {
img0.Clear()
s := 1 - float64(i)/8
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
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op.GeoM.Scale(s, s)
op.ColorScale.Scale(1, 1, 0, 1)
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img0.DrawImage(img1, op)
op.GeoM.Translate(128, 0)
op.ColorScale.Reset()
op.ColorScale.Scale(0, 1, 1, 1)
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img0.DrawImage(img1, op)
want := color.RGBA{G: 0xff, B: 0xff, A: 0xff}
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got := img0.At(128, 0)
if got != want {
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t.Errorf("want: %v, got: %v", want, got)
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}
}
}
// Issue #725
func TestImageMiamapAndDrawTriangle(t *testing.T) {
img0 := ebiten.NewImage(32, 32)
img1 := ebiten.NewImage(128, 128)
img2 := ebiten.NewImage(128, 128)
// Fill img1 red and create img1's mipmap
img1.Fill(color.RGBA{R: 0xff, A: 0xff})
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(0.25, 0.25)
op.Filter = ebiten.FilterLinear
img0.DrawImage(img1, op)
// Call DrawTriangle on img1 and fill it with green
img2.Fill(color.RGBA{G: 0xff, A: 0xff})
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 128,
DstY: 0,
SrcX: 128,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: 128,
SrcX: 0,
SrcY: 128,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 128,
DstY: 128,
SrcX: 128,
SrcY: 128,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
img1.DrawTriangles(vs, []uint16{0, 1, 2, 1, 2, 3}, img2, nil)
// Draw img1 (green) again. Confirm mipmap is correctly updated.
img0.Clear()
op = &ebiten.DrawImageOptions{}
op.GeoM.Scale(0.25, 0.25)
op.Filter = ebiten.FilterLinear
img0.DrawImage(img1, op)
w, h := img0.Bounds().Dx(), img0.Bounds().Dy()
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
c := img0.At(i, j).(color.RGBA)
if c.R != 0 {
t.Errorf("img0.At(%d, %d): red want %d got %d", i, j, 0, c.R)
}
}
}
}
func TestImageSubImageAt(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Fill(color.RGBA{R: 0xff, A: 0xff})
got := img.SubImage(image.Rect(1, 1, 16, 16)).At(0, 0).(color.RGBA)
want := color.RGBA{}
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
got = img.SubImage(image.Rect(1, 1, 16, 16)).At(1, 1).(color.RGBA)
want = color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageSubImageSize(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Fill(color.RGBA{R: 0xff, A: 0xff})
got := img.SubImage(image.Rect(1, 1, 16, 16)).Bounds().Dx()
want := 15
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageDrawImmediately(t *testing.T) {
const w, h = 16, 16
img0 := ebiten.NewImage(w, h)
img1 := ebiten.NewImage(w, h)
// Do not manipulate img0 here.
img0.Fill(color.RGBA{R: 0xff, A: 0xff})
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img0.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("img0.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
img0.DrawImage(img1, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img0.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("img0.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
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// Issue #669, #759
func TestImageLinearFilterGlitch(t *testing.T) {
const w, h = 200, 12
const scale = 1.2
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(int(math.Floor(w*scale)), h)
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pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := i + w*j
if j < 3 {
pix[4*idx] = 0xff
pix[4*idx+1] = 0xff
pix[4*idx+2] = 0xff
pix[4*idx+3] = 0xff
} else {
pix[4*idx] = 0
pix[4*idx+1] = 0
pix[4*idx+2] = 0
pix[4*idx+3] = 0xff
}
}
}
src.WritePixels(pix)
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for _, f := range []ebiten.Filter{ebiten.FilterNearest, ebiten.FilterLinear} {
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(scale, 1)
op.Filter = f
dst.DrawImage(src, op)
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for j := 1; j < h-1; j++ {
offset := int(math.Ceil(scale))
for i := offset; i < int(math.Floor(w*scale))-offset; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if j < 3 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
} else {
want = color.RGBA{A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): filter: %d, got: %v, want: %v", i, j, f, got, want)
}
2018-12-20 20:08:44 +01:00
}
}
}
}
// Issue #1212
func TestImageLinearFilterGlitch2(t *testing.T) {
const w, h = 100, 100
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
idx := 0
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if i+j < 100 {
pix[4*idx] = 0
pix[4*idx+1] = 0
pix[4*idx+2] = 0
pix[4*idx+3] = 0xff
} else {
pix[4*idx] = 0xff
pix[4*idx+1] = 0xff
pix[4*idx+2] = 0xff
pix[4*idx+3] = 0xff
}
idx++
}
}
src.WritePixels(pix)
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
dst.DrawImage(src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if i+j < 100 {
want = color.RGBA{A: 0xff}
} else {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageAddressRepeat(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
if 4 <= i && i < 8 && 4 <= j && j < 8 {
pix[idx] = byte(i-4) * 0x10
pix[idx+1] = byte(j-4) * 0x10
pix[idx+2] = 0
pix[idx+3] = 0xff
} else {
pix[idx] = 0
pix[idx+1] = 0
pix[idx+2] = 0xff
pix[idx+3] = 0xff
}
}
}
src.WritePixels(pix)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
op := &ebiten.DrawTrianglesOptions{}
op.Address = ebiten.AddressRepeat
dst.DrawTriangles(vs, is, src.SubImage(image.Rect(4, 4, 8, 8)).(*ebiten.Image), op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: byte(i%4) * 0x10, G: byte(j%4) * 0x10, A: 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
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func TestImageAddressRepeatNegativePosition(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
if 4 <= i && i < 8 && 4 <= j && j < 8 {
pix[idx] = byte(i-4) * 0x10
pix[idx+1] = byte(j-4) * 0x10
pix[idx+2] = 0
pix[idx+3] = 0xff
} else {
pix[idx] = 0
pix[idx+1] = 0
pix[idx+2] = 0xff
pix[idx+3] = 0xff
}
}
}
src.WritePixels(pix)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: -w,
SrcY: -h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: 0,
SrcY: -h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: -w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
op := &ebiten.DrawTrianglesOptions{}
op.Address = ebiten.AddressRepeat
dst.DrawTriangles(vs, is, src.SubImage(image.Rect(4, 4, 8, 8)).(*ebiten.Image), op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: byte(i%4) * 0x10, G: byte(j%4) * 0x10, A: 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageWritePixelsAfterClear(t *testing.T) {
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const w, h = 256, 256
img := ebiten.NewImage(w, h)
img.WritePixels(make([]byte, 4*w*h))
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// Clear used to call DrawImage to clear the image, which was the cause of crash. It is because after
// DrawImage is called, WritePixels for a region is forbidden.
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//
// Now WritePixels was always called at Clear instead.
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img.Clear()
img.WritePixels(make([]byte, 4*w*h))
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// The test passes if this doesn't crash.
}
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func TestImageSet(t *testing.T) {
type Pt struct {
X, Y int
}
const w, h = 16, 16
img := ebiten.NewImage(w, h)
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colors := map[Pt]color.RGBA{
{1, 2}: {3, 4, 5, 6},
{7, 8}: {9, 10, 11, 12},
{13, 14}: {15, 16, 17, 18},
{-1, -1}: {19, 20, 21, 22},
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}
for p, c := range colors {
img.Set(p.X, p.Y, c)
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img.At(i, j).(color.RGBA)
var want color.RGBA
if c, ok := colors[Pt{i, j}]; ok {
want = c
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageSetAndDraw(t *testing.T) {
type Pt struct {
X, Y int
}
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
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colors := map[Pt]color.RGBA{
{1, 2}: {3, 4, 5, 6},
{7, 8}: {9, 10, 11, 12},
{13, 14}: {15, 16, 17, 18},
}
for p, c := range colors {
src.Set(p.X, p.Y, c)
dst.Set(p.X+1, p.Y+1, c)
}
dst.DrawImage(src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if c, ok := colors[Pt{i, j}]; ok {
want = c
}
if c, ok := colors[Pt{i - 1, j - 1}]; ok {
want = c
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
src.Clear()
dst.Clear()
for p, c := range colors {
src.Set(p.X, p.Y, c)
dst.Set(p.X+1, p.Y+1, c)
}
op := &ebiten.DrawImageOptions{}
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op.GeoM.Translate(2, 2)
dst.DrawImage(src.SubImage(image.Rect(2, 2, w-2, h-2)).(*ebiten.Image), op)
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for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if 2 <= i && 2 <= j && i < w-2 && j < h-2 {
if c, ok := colors[Pt{i, j}]; ok {
want = c
}
}
if c, ok := colors[Pt{i - 1, j - 1}]; ok {
want = c
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
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func TestImageAlphaOnBlack(t *testing.T) {
const w, h = 16, 16
src0 := ebiten.NewImage(w, h)
src1 := ebiten.NewImage(w, h)
dst0 := ebiten.NewImage(w, h)
dst1 := ebiten.NewImage(w, h)
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pix0 := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if (i/3)%2 == (j/3)%2 {
pix0[4*(i+j*w)] = 0xff
pix0[4*(i+j*w)+1] = 0xff
pix0[4*(i+j*w)+2] = 0xff
pix0[4*(i+j*w)+3] = 0xff
}
}
}
src0.WritePixels(pix0)
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pix1 := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if (i/3)%2 == (j/3)%2 {
pix1[4*(i+j*w)] = 0xff
pix1[4*(i+j*w)+1] = 0xff
pix1[4*(i+j*w)+2] = 0xff
pix1[4*(i+j*w)+3] = 0xff
} else {
pix1[4*(i+j*w)] = 0
pix1[4*(i+j*w)+1] = 0
pix1[4*(i+j*w)+2] = 0
pix1[4*(i+j*w)+3] = 0xff
}
}
}
src1.WritePixels(pix1)
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dst0.Fill(color.Black)
dst1.Fill(color.Black)
op := &ebiten.DrawImageOptions{}
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op.GeoM.Scale(0.5, 0.5)
op.Filter = ebiten.FilterLinear
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dst0.DrawImage(src0, op)
dst1.DrawImage(src1, op)
gray := false
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst0.At(i, j)
want := dst1.At(i, j)
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
if r := got.(color.RGBA).R; 0 < r && r < 255 {
gray = true
}
}
}
if !gray {
t.Errorf("gray must be included in the results but not")
}
}
func TestImageDrawTrianglesWithSubImage(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if 4 <= i && i < 8 && 4 <= j && j < 8 {
pix[4*(i+j*w)] = 0xff
pix[4*(i+j*w)+1] = 0
pix[4*(i+j*w)+2] = 0
pix[4*(i+j*w)+3] = 0xff
} else {
pix[4*(i+j*w)] = 0
pix[4*(i+j*w)+1] = 0xff
pix[4*(i+j*w)+2] = 0
pix[4*(i+j*w)+3] = 0xff
}
}
}
src.WritePixels(pix)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
op := &ebiten.DrawTrianglesOptions{}
op.Address = ebiten.AddressClampToZero
dst.DrawTriangles(vs, is, src.SubImage(image.Rect(4, 4, 8, 8)).(*ebiten.Image), op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
var want color.RGBA
if 4 <= i && i < 8 && 4 <= j && j < 8 {
want = src.At(i, j).(color.RGBA)
}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #823
func TestImageAtAfterDisposingSubImage(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Set(0, 0, color.White)
img.SubImage(image.Rect(0, 0, 16, 16))
runtime.GC()
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
want64 := color.RGBA64{R: 0xffff, G: 0xffff, B: 0xffff, A: 0xffff}
got := img.At(0, 0)
if got != want {
t.Errorf("At(0,0) got: %v, want: %v", got, want)
}
got = img.RGBA64At(0, 0)
if got != want64 {
t.Errorf("RGBA64At(0,0) got: %v, want: %v", got, want)
}
img.Set(0, 1, color.White)
sub := img.SubImage(image.Rect(0, 0, 16, 16)).(*ebiten.Image)
sub.Dispose()
got = img.At(0, 1)
if got != want {
t.Errorf("At(0,1) got: %v, want: %v", got, want64)
}
got = img.RGBA64At(0, 1)
if got != want64 {
t.Errorf("RGBA64At(0,1) got: %v, want: %v", got, want64)
}
}
func TestImageAtAfterDeallocateSubImage(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Set(0, 0, color.White)
img.SubImage(image.Rect(0, 0, 16, 16))
runtime.GC()
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
want64 := color.RGBA64{R: 0xffff, G: 0xffff, B: 0xffff, A: 0xffff}
got := img.At(0, 0)
if got != want {
t.Errorf("At(0,0) got: %v, want: %v", got, want)
}
got = img.RGBA64At(0, 0)
if got != want64 {
t.Errorf("RGBA64At(0,0) got: %v, want: %v", got, want)
}
img.Set(0, 1, color.White)
sub := img.SubImage(image.Rect(0, 0, 16, 16)).(*ebiten.Image)
sub.Deallocate()
got = img.At(0, 1)
if got != want {
t.Errorf("At(0,1) got: %v, want: %v", got, want64)
}
got = img.RGBA64At(0, 1)
if got != want64 {
t.Errorf("RGBA64At(0,1) got: %v, want: %v", got, want64)
}
}
func TestImageSubImageSubImage(t *testing.T) {
img := ebiten.NewImage(16, 16)
img.Fill(color.White)
sub0 := img.SubImage(image.Rect(0, 0, 12, 12)).(*ebiten.Image)
sub1 := sub0.SubImage(image.Rect(4, 4, 16, 16)).(*ebiten.Image)
cases := []struct {
X int
Y int
Color color.RGBA
}{
{
X: 0,
Y: 0,
Color: color.RGBA{},
},
{
X: 4,
Y: 4,
Color: color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
},
{
X: 15,
Y: 15,
Color: color.RGBA{},
},
}
for _, c := range cases {
got := sub1.At(c.X, c.Y)
want := c.Color
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", c.X, c.Y, got, want)
}
}
}
// Issue #839
func TestImageTooSmallMipmap(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
src.Fill(color.White)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(1, 0.24)
op.Filter = ebiten.FilterLinear
dst.DrawImage(src.SubImage(image.Rect(5, 0, 6, 16)).(*ebiten.Image), op)
got := dst.At(0, 0).(color.RGBA)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
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func TestImageZeroSizedMipmap(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
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op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
dst.DrawImage(src.SubImage(image.ZR).(*ebiten.Image), op)
2019-04-25 03:51:49 +02:00
}
// Issue #898
func TestImageFillingAndEdges(t *testing.T) {
const (
srcw, srch = 16, 16
dstw, dsth = 256, 16
)
src := ebiten.NewImage(srcw, srch)
dst := ebiten.NewImage(dstw, dsth)
src.Fill(color.White)
dst.Fill(color.Black)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(float64(dstw-2)/float64(srcw), float64(dsth-2)/float64(srch))
op.GeoM.Translate(1, 1)
dst.DrawImage(src, op)
for j := 0; j < dsth; j++ {
for i := 0; i < dstw; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if i == 0 || i == dstw-1 || j == 0 || j == dsth-1 {
want = color.RGBA{A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageDrawTrianglesAndMutateArgs(t *testing.T) {
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
clr := color.RGBA{R: 0xff, A: 0xff}
src.Fill(clr)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, nil)
vs[0].SrcX = w
vs[0].SrcY = h
is[5] = 0
for j := 0; j < w; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := clr
if got != want {
t.Errorf("dst.At(%d, %d): got %v, want %v", i, j, got, want)
}
}
}
}
func TestImageWritePixelsOnSubImage(t *testing.T) {
dst := ebiten.NewImage(17, 31)
dst.Fill(color.RGBA{R: 0xff, A: 0xff})
pix0 := make([]byte, 4*5*3)
idx := 0
for j := 0; j < 3; j++ {
for i := 0; i < 5; i++ {
pix0[4*idx] = 0
pix0[4*idx+1] = 0xff
pix0[4*idx+2] = 0
pix0[4*idx+3] = 0xff
idx++
}
}
r0 := image.Rect(4, 5, 9, 8)
dst.SubImage(r0).(*ebiten.Image).WritePixels(pix0)
pix1 := make([]byte, 4*5*3)
idx = 0
for j := 0; j < 3; j++ {
for i := 0; i < 5; i++ {
pix1[4*idx] = 0
pix1[4*idx+1] = 0
pix1[4*idx+2] = 0xff
pix1[4*idx+3] = 0xff
idx++
}
}
r1 := image.Rect(11, 10, 16, 13)
dst.SubImage(r1).(*ebiten.Image).WritePixels(pix1)
// Clear the pixels. This should not affect the result.
idx = 0
for j := 0; j < 3; j++ {
for i := 0; i < 5; i++ {
pix1[4*idx] = 0
pix1[4*idx+1] = 0
pix1[4*idx+2] = 0
pix1[4*idx+3] = 0
idx++
}
}
for j := 0; j < 31; j++ {
for i := 0; i < 17; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
p := image.Pt(i, j)
switch {
case p.In(r0):
want = color.RGBA{G: 0xff, A: 0xff}
case p.In(r1):
want = color.RGBA{B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageDrawTrianglesWithColorM(t *testing.T) {
const w, h = 16, 16
dst0 := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
src.Fill(color.White)
vs0 := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
op := &ebiten.DrawTrianglesOptions{}
op.ColorM.Scale(0.2, 0.4, 0.6, 0.8)
is := []uint16{0, 1, 2, 1, 2, 3}
dst0.DrawTriangles(vs0, is, src, op)
for _, format := range []ebiten.ColorScaleMode{
ebiten.ColorScaleModeStraightAlpha,
ebiten.ColorScaleModePremultipliedAlpha,
} {
format := format
t.Run(fmt.Sprintf("format%d", format), func(t *testing.T) {
var cr, cg, cb, ca float32
switch format {
case ebiten.ColorScaleModeStraightAlpha:
// The values are the same as ColorM.Scale
cr = 0.2
cg = 0.4
cb = 0.6
ca = 0.8
case ebiten.ColorScaleModePremultipliedAlpha:
cr = 0.2 * 0.8
cg = 0.4 * 0.8
cb = 0.6 * 0.8
ca = 0.8
}
vs1 := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: cr,
ColorG: cg,
ColorB: cb,
ColorA: ca,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: cr,
ColorG: cg,
ColorB: cb,
ColorA: ca,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: cr,
ColorG: cg,
ColorB: cb,
ColorA: ca,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: cr,
ColorG: cg,
ColorB: cb,
ColorA: ca,
},
}
dst1 := ebiten.NewImage(w, h)
op := &ebiten.DrawTrianglesOptions{}
op.ColorScaleMode = format
dst1.DrawTriangles(vs1, is, src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst0.At(i, j)
want := dst1.At(i, j)
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
})
}
}
func TestImageDrawTrianglesInterpolatesColors(t *testing.T) {
const w, h = 3, 1
src := ebiten.NewImage(w, h)
src.Fill(color.White)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 0,
ColorB: 0,
ColorA: 0,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 0,
ColorG: 1,
ColorB: 0,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 0,
ColorB: 0,
ColorA: 0,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 0,
ColorG: 1,
ColorB: 0,
ColorA: 1,
},
}
for _, format := range []ebiten.ColorScaleMode{
ebiten.ColorScaleModeStraightAlpha,
ebiten.ColorScaleModePremultipliedAlpha,
} {
format := format
t.Run(fmt.Sprintf("format%d", format), func(t *testing.T) {
dst := ebiten.NewImage(w, h)
dst.Fill(color.RGBA{B: 0xff, A: 0xff})
op := &ebiten.DrawTrianglesOptions{}
op.ColorScaleMode = format
is := []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, op)
got := dst.At(1, 0).(color.RGBA)
// Correct color interpolation uses the alpha channel
// and notices that colors on the left side of the texture are fully transparent.
var want color.RGBA
switch format {
case ebiten.ColorScaleModeStraightAlpha:
want = color.RGBA{G: 0x80, B: 0x80, A: 0xff}
case ebiten.ColorScaleModePremultipliedAlpha:
want = color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0xff}
}
if !sameColors(got, want, 2) {
t.Errorf("At(1, 0): got: %v, want: %v", got, want)
}
})
}
}
func TestImageDrawTrianglesShaderInterpolatesValues(t *testing.T) {
const w, h = 3, 1
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
src.Fill(color.White)
vs := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 0,
ColorB: 0,
ColorA: 0,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 0,
ColorG: 1,
ColorB: 0,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 0,
ColorB: 0,
ColorA: 0,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 0,
ColorG: 1,
ColorB: 0,
ColorA: 1,
},
}
dst.Fill(color.RGBA{B: 0xff, A: 0xff})
op := &ebiten.DrawTrianglesShaderOptions{
Images: [4]*ebiten.Image{src, nil, nil, nil},
}
is := []uint16{0, 1, 2, 1, 2, 3}
shader, err := ebiten.NewShader([]byte(`
package main
func Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {
return color
}
`))
if err != nil {
t.Fatalf("could not compile shader: %v", err)
}
dst.DrawTrianglesShader(vs, is, shader, op)
got := dst.At(1, 0).(color.RGBA)
// Shaders get each color value interpolated independently.
want := color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0xff}
if !sameColors(got, want, 2) {
t.Errorf("At(1, 0): got: %v, want: %v", got, want)
}
}
// Issue #1137
func TestImageDrawOver(t *testing.T) {
const (
w = 320
h = 240
)
dst := ebiten.NewImage(w, h)
src := image.NewUniform(color.RGBA{R: 0xff, A: 0xff})
// This must not cause infinite-loop.
draw.Draw(dst, dst.Bounds(), src, image.ZP, draw.Over)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageDrawDisposedImage(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawImage must panic but not")
}
}()
dst := ebiten.NewImage(16, 16)
src := ebiten.NewImage(16, 16)
src.Dispose()
dst.DrawImage(src, nil)
}
func TestImageDrawDeallocatedImage(t *testing.T) {
dst := ebiten.NewImage(16, 16)
src := ebiten.NewImage(16, 16)
src.Deallocate()
// DrawImage must not panic.
dst.DrawImage(src, nil)
}
func TestImageDrawTrianglesDisposedImage(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawTriangles must panic but not")
}
}()
dst := ebiten.NewImage(16, 16)
src := ebiten.NewImage(16, 16)
src.Dispose()
vs := make([]ebiten.Vertex, 4)
is := []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, nil)
}
func TestImageDrawTrianglesDeallocateImage(t *testing.T) {
dst := ebiten.NewImage(16, 16)
src := ebiten.NewImage(16, 16)
src.Deallocate()
vs := make([]ebiten.Vertex, 4)
is := []uint16{0, 1, 2, 1, 2, 3}
// DrawTriangles must not panic.
dst.DrawTriangles(vs, is, src, nil)
}
// #1137
func BenchmarkImageDrawOver(b *testing.B) {
dst := ebiten.NewImage(16, 16)
src := image.NewUniform(color.Black)
for n := 0; n < b.N; n++ {
draw.Draw(dst, dst.Bounds(), src, image.ZP, draw.Over)
}
}
// Issue #1171
func TestImageFloatTranslate(t *testing.T) {
const w, h = 32, 32
for s := 2; s <= 8; s++ {
s := s
t.Run(fmt.Sprintf("scale%d", s), func(t *testing.T) {
check := func(src *ebiten.Image) {
dst := ebiten.NewImage(w*(s+1), h*(s+1))
dst.Fill(color.RGBA{R: 0xff, A: 0xff})
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(float64(s), float64(s))
op.GeoM.Translate(0, 0.501)
dst.DrawImage(src, op)
for j := 0; j < h*s+1; j++ {
for i := 0; i < w*s; i++ {
got := dst.At(i, j)
x := byte(0xff)
if j > 0 {
x = (byte(j) - 1) / byte(s)
}
want := color.RGBA{R: x, A: 0xff}
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
t.Run("image", func(t *testing.T) {
src := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
pix[4*(j*w+i)] = byte(j)
pix[4*(j*w+i)+3] = 0xff
}
}
src.WritePixels(pix)
check(src)
})
t.Run("subimage", func(t *testing.T) {
src := ebiten.NewImage(w*s, h*s)
pix := make([]byte, 4*(w*s)*(h*s))
for j := 0; j < h*s; j++ {
for i := 0; i < w*s; i++ {
pix[4*(j*(w*s)+i)] = byte(j)
pix[4*(j*(w*s)+i)+3] = 0xff
}
}
src.WritePixels(pix)
check(src.SubImage(image.Rect(0, 0, w, h)).(*ebiten.Image))
})
})
}
}
// Issue #1213
func TestImageColorMCopy(t *testing.T) {
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
for k := 0; k < 256; k++ {
op := &ebiten.DrawImageOptions{}
op.ColorM.Translate(1, 1, 1, float64(k)/0xff)
op.Blend = ebiten.BlendCopy
dst.DrawImage(src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: byte(k), G: byte(k), B: byte(k), A: byte(k)}
if !sameColors(got, want, 1) {
t.Fatalf("dst.At(%d, %d), k: %d: got %v, want %v", i, j, k, got, want)
}
}
}
}
}
// TODO: Do we have to guarantee this behavior? See #1222
func TestImageWritePixelsAndModifyPixels(t *testing.T) {
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix[idx] = 0xff
pix[idx+1] = 0
pix[idx+2] = 0
pix[idx+3] = 0xff
}
}
src.WritePixels(pix)
// Modify pix after WritePixels
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix[idx] = 0
pix[idx+1] = 0xff
pix[idx+2] = 0
pix[idx+3] = 0xff
}
}
// Ensure that src's pixels are actually used
dst.DrawImage(src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := src.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("src.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageCompositeModeMultiply(t *testing.T) {
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
dst.Fill(color.RGBA{R: 0x10, G: 0x20, B: 0x30, A: 0x40})
src.Fill(color.RGBA{R: 0x50, G: 0x60, B: 0x70, A: 0x80})
op := &ebiten.DrawImageOptions{}
op.CompositeMode = ebiten.CompositeModeMultiply
dst.DrawImage(src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{
R: byte(math.Floor((0x10 / 255.0) * (0x50 / 255.0) * 255)),
G: byte(math.Floor((0x20 / 255.0) * (0x60 / 255.0) * 255)),
B: byte(math.Floor((0x30 / 255.0) * (0x70 / 255.0) * 255)),
A: byte(math.Floor((0x40 / 255.0) * (0x80 / 255.0) * 255)),
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #1269
func TestImageZeroTriangle(t *testing.T) {
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(1, 1)
vs := []ebiten.Vertex{}
is := []uint16{}
dst.DrawTriangles(vs, is, src, nil)
}
// Issue #1398
func TestImageDrawImageTooBigScale(t *testing.T) {
dst := ebiten.NewImage(1, 1)
src := ebiten.NewImage(1, 1)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(1e20, 1e20)
dst.DrawImage(src, op)
}
// Issue #1398
func TestImageDrawImageTooSmallScale(t *testing.T) {
dst := ebiten.NewImage(1, 1)
src := ebiten.NewImage(1, 1)
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
op.GeoM.Scale(1e-10, 1e-10)
dst.DrawImage(src, op)
}
// Issue #1399
2020-10-21 04:33:03 +02:00
func TestImageDrawImageCannotAllocateImageForMipmap(t *testing.T) {
dst := ebiten.NewImage(1, 1)
src := ebiten.NewImage(maxImageSize, maxImageSize)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(64, 64)
dst.DrawImage(src, op)
dst.At(0, 0)
}
func TestImageNewImageWithZeroSize(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawImage must panic but not")
}
}()
_ = ebiten.NewImage(0, 1)
}
func TestImageNewImageFromImageWithZeroSize(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawImage must panic but not")
}
}()
img := image.NewRGBA(image.Rect(0, 0, 0, 1))
_ = ebiten.NewImageFromImage(img)
}
func TestImageClip(t *testing.T) {
const (
w = 16
h = 16
)
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
dst.Fill(color.RGBA{R: 0xff, A: 0xff})
src.Fill(color.RGBA{G: 0xff, A: 0xff})
dst.SubImage(image.Rect(4, 5, 12, 14)).(*ebiten.Image).DrawImage(src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
if 4 <= i && i < 12 && 5 <= j && j < 14 {
want = color.RGBA{G: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #1691
func TestImageSubImageFill(t *testing.T) {
dst := ebiten.NewImage(3, 3).SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
dst.Fill(color.White)
for j := 0; j < 3; j++ {
for i := 0; i < 3; i++ {
got := dst.At(i, j)
var want color.RGBA
if i == 1 && j == 1 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
dst = ebiten.NewImage(17, 31).SubImage(image.Rect(3, 4, 8, 10)).(*ebiten.Image)
dst.Fill(color.White)
for j := 0; j < 31; j++ {
for i := 0; i < 17; i++ {
got := dst.At(i, j)
var want color.RGBA
if 3 <= i && i < 8 && 4 <= j && j < 10 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageEvenOdd(t *testing.T) {
2022-10-21 08:23:09 +02:00
whiteImage := ebiten.NewImage(3, 3)
whiteImage.Fill(color.White)
emptySubImage := whiteImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
vs0 := []ebiten.Vertex{
{
DstX: 1, DstY: 1, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 15, DstY: 1, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 1, DstY: 15, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 15, DstY: 15, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
}
is0 := []uint16{0, 1, 2, 1, 2, 3}
vs1 := []ebiten.Vertex{
{
DstX: 2, DstY: 2, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 14, DstY: 2, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 2, DstY: 14, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 14, DstY: 14, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
}
is1 := []uint16{4, 5, 6, 5, 6, 7}
vs2 := []ebiten.Vertex{
{
DstX: 3, DstY: 3, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 13, DstY: 3, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 3, DstY: 13, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 13, DstY: 13, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
}
is2 := []uint16{8, 9, 10, 9, 10, 11}
// Draw all the vertices once. The even-odd rule is applied for all the vertices once.
dst := ebiten.NewImage(16, 16)
op := &ebiten.DrawTrianglesOptions{
FillRule: ebiten.FillRuleEvenOdd,
}
dst.DrawTriangles(append(append(vs0, vs1...), vs2...), append(append(is0, is1...), is2...), emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 3 <= i && i < 13 && 3 <= j && j < 13:
want = color.RGBA{B: 0xff, A: 0xff}
case 2 <= i && i < 14 && 2 <= j && j < 14:
want = color.RGBA{}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{R: 0xff, A: 0xff}
default:
want = color.RGBA{}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// Do the same thing but with a little shift. This confirms that the underlying stencil buffer is cleared correctly.
for i := range vs0 {
vs0[i].DstX++
vs0[i].DstY++
}
for i := range vs1 {
vs1[i].DstX++
vs1[i].DstY++
}
for i := range vs2 {
vs2[i].DstX++
vs2[i].DstY++
}
dst.Clear()
dst.DrawTriangles(append(append(vs0, vs1...), vs2...), append(append(is0, is1...), is2...), emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 4 <= i && i < 14 && 4 <= j && j < 14:
want = color.RGBA{B: 0xff, A: 0xff}
case 3 <= i && i < 15 && 3 <= j && j < 15:
want = color.RGBA{}
case 2 <= i && i < 16 && 2 <= j && j < 16:
want = color.RGBA{R: 0xff, A: 0xff}
default:
want = color.RGBA{}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// Do the same thing but with split DrawTriangle calls. This confirms that the even-odd rule is applied for one call.
for i := range vs0 {
vs0[i].DstX--
vs0[i].DstY--
}
for i := range vs1 {
vs1[i].DstX--
vs1[i].DstY--
}
for i := range vs2 {
vs2[i].DstX--
vs2[i].DstY--
}
dst.Clear()
// Use the first indices set.
dst.DrawTriangles(vs0, is0, emptySubImage, op)
dst.DrawTriangles(vs1, is0, emptySubImage, op)
dst.DrawTriangles(vs2, is0, emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 3 <= i && i < 13 && 3 <= j && j < 13:
want = color.RGBA{B: 0xff, A: 0xff}
case 2 <= i && i < 14 && 2 <= j && j < 14:
want = color.RGBA{G: 0xff, A: 0xff}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{R: 0xff, A: 0xff}
default:
want = color.RGBA{}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageFillRule(t *testing.T) {
for _, fillRule := range []ebiten.FillRule{ebiten.FillRuleFillAll, ebiten.FillRuleNonZero, ebiten.FillRuleEvenOdd} {
fillRule := fillRule
var name string
switch fillRule {
case ebiten.FillRuleFillAll:
name = "FillAll"
case ebiten.FillRuleNonZero:
name = "NonZero"
case ebiten.FillRuleEvenOdd:
name = "EvenOdd"
}
t.Run(name, func(t *testing.T) {
whiteImage := ebiten.NewImage(3, 3)
whiteImage.Fill(color.White)
emptySubImage := whiteImage.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
// The outside rectangle (clockwise)
vs0 := []ebiten.Vertex{
{
DstX: 1, DstY: 1, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 15, DstY: 1, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 15, DstY: 15, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
{
DstX: 1, DstY: 15, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 0, ColorB: 0, ColorA: 1,
},
}
is0 := []uint16{0, 1, 2, 2, 3, 0}
// An inside rectangle (clockwise)
vs1 := []ebiten.Vertex{
{
DstX: 2, DstY: 2, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 7, DstY: 2, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 7, DstY: 7, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
{
DstX: 2, DstY: 7, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 1, ColorB: 0, ColorA: 1,
},
}
is1 := []uint16{4, 5, 6, 6, 7, 4}
// An inside rectangle (counter-clockwise)
vs2 := []ebiten.Vertex{
{
DstX: 9, DstY: 9, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 14, DstY: 9, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 14, DstY: 14, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
{
DstX: 9, DstY: 14, SrcX: 1, SrcY: 1,
ColorR: 0, ColorG: 0, ColorB: 1, ColorA: 1,
},
}
is2 := []uint16{8, 11, 10, 10, 9, 8}
// Draw all the vertices once. The even-odd rule is applied for all the vertices once.
dst := ebiten.NewImage(16, 16)
op := &ebiten.DrawTrianglesOptions{
FillRule: fillRule,
}
dst.DrawTriangles(append(append(vs0, vs1...), vs2...), append(append(is0, is1...), is2...), emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 2 <= i && i < 7 && 2 <= j && j < 7:
if fillRule != ebiten.FillRuleEvenOdd {
want = color.RGBA{G: 0xff, A: 0xff}
}
case 9 <= i && i < 14 && 9 <= j && j < 14:
if fillRule == ebiten.FillRuleFillAll {
want = color.RGBA{B: 0xff, A: 0xff}
}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{R: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// Do the same thing but with a little shift. This confirms that the underlying stencil buffer is cleared correctly.
for i := range vs0 {
vs0[i].DstX++
vs0[i].DstY++
}
for i := range vs1 {
vs1[i].DstX++
vs1[i].DstY++
}
for i := range vs2 {
vs2[i].DstX++
vs2[i].DstY++
}
dst.Clear()
dst.DrawTriangles(append(append(vs0, vs1...), vs2...), append(append(is0, is1...), is2...), emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 3 <= i && i < 8 && 3 <= j && j < 8:
if fillRule != ebiten.FillRuleEvenOdd {
want = color.RGBA{G: 0xff, A: 0xff}
}
case 10 <= i && i < 15 && 10 <= j && j < 15:
if fillRule == ebiten.FillRuleFillAll {
want = color.RGBA{B: 0xff, A: 0xff}
}
case 2 <= i && i < 16 && 2 <= j && j < 16:
want = color.RGBA{R: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// Do the same thing but with split DrawTriangle calls. This confirms that fill rules are applied for one call.
for i := range vs0 {
vs0[i].DstX--
vs0[i].DstY--
}
for i := range vs1 {
vs1[i].DstX--
vs1[i].DstY--
}
for i := range vs2 {
vs2[i].DstX--
vs2[i].DstY--
}
dst.Clear()
dst.DrawTriangles(vs0, []uint16{0, 1, 2, 2, 3, 0}, emptySubImage, op)
dst.DrawTriangles(vs1, []uint16{0, 1, 2, 2, 3, 0}, emptySubImage, op)
dst.DrawTriangles(vs2, []uint16{0, 3, 2, 2, 1, 0}, emptySubImage, op)
for j := 0; j < 16; j++ {
for i := 0; i < 16; i++ {
got := dst.At(i, j)
var want color.RGBA
switch {
case 2 <= i && i < 7 && 2 <= j && j < 7:
want = color.RGBA{G: 0xff, A: 0xff}
case 9 <= i && i < 14 && 9 <= j && j < 14:
want = color.RGBA{B: 0xff, A: 0xff}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{R: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
})
}
}
// #1658
func BenchmarkColorMScale(b *testing.B) {
r := rand.Float64
dst := ebiten.NewImage(16, 16)
src := ebiten.NewImage(16, 16)
for n := 0; n < b.N; n++ {
op := &ebiten.DrawImageOptions{}
op.ColorM.Scale(r(), r(), r(), r())
dst.DrawImage(src, op)
}
}
func TestImageMoreIndicesThanMaxUint16(t *testing.T) {
const (
w = 16
h = 16
)
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
src.Fill(color.White)
op := &ebiten.DrawTrianglesOptions{}
vs := make([]ebiten.Vertex, 3)
is := make([]uint16, 65538)
dst.DrawTriangles(vs, is, src, op)
// The next draw call should work well (and this is likely batched).
vs = []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is = []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageMoreVerticesThanMaxUint16(t *testing.T) {
const (
w = 16
h = 16
)
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
src.Fill(color.White)
op := &ebiten.DrawTrianglesOptions{}
vs := make([]ebiten.Vertex, math.MaxUint16+1)
is := make([]uint16, 3)
dst.DrawTriangles(vs, is, src, op)
// The next draw call should work well (and this is likely batched).
vs = []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is = []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, op)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageNewImageFromEbitenImage(t *testing.T) {
const (
w = 16
h = 16
)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix[idx] = byte(i)
pix[idx+1] = byte(j)
pix[idx+2] = 0
pix[idx+3] = 0xff
}
}
img0 := ebiten.NewImage(w, h)
img0.WritePixels(pix)
img1 := ebiten.NewImageFromImage(img0)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img1.At(i, j)
want := color.RGBA{R: byte(i), G: byte(j), A: 0xff}
if got != want {
t.Errorf("img1.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
img2 := ebiten.NewImageFromImage(img0.SubImage(image.Rect(4, 4, 12, 12)))
for j := 0; j < h/2; j++ {
for i := 0; i < w/2; i++ {
got := img2.At(i, j)
want := color.RGBA{R: byte(i + 4), G: byte(j + 4), A: 0xff}
if got != want {
t.Errorf("img1.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageOptionsUnmanaged(t *testing.T) {
const (
w = 16
h = 16
)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix[idx] = byte(i)
pix[idx+1] = byte(j)
pix[idx+2] = 0
pix[idx+3] = 0xff
}
}
op := &ebiten.NewImageOptions{
Unmanaged: true,
}
img := ebiten.NewImageWithOptions(image.Rect(0, 0, w, h), op)
img.WritePixels(pix)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img.At(i, j)
want := color.RGBA{R: byte(i), G: byte(j), A: 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageOptionsNegativeBoundsWritePixels(t *testing.T) {
const (
w = 16
h = 16
)
pix0 := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix0[idx] = byte(i)
pix0[idx+1] = byte(j)
pix0[idx+2] = 0
pix0[idx+3] = 0xff
}
}
const offset = -8
img := ebiten.NewImageWithOptions(image.Rect(offset, offset, w+offset, h+offset), nil)
img.WritePixels(pix0)
for j := offset; j < h+offset; j++ {
for i := offset; i < w+offset; i++ {
got := img.At(i, j)
want := color.RGBA{R: byte(i - offset), G: byte(j - offset), A: 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
pix1 := make([]byte, 4*(w/2)*(h/2))
for j := 0; j < h/2; j++ {
for i := 0; i < w/2; i++ {
idx := 4 * (i + j*w/2)
pix1[idx] = 0
pix1[idx+1] = 0
pix1[idx+2] = 0xff
pix1[idx+3] = 0xff
}
}
const offset2 = -4
sub := image.Rect(offset2, offset2, w/2+offset2, h/2+offset2)
img.SubImage(sub).(*ebiten.Image).WritePixels(pix1)
for j := offset; j < h+offset; j++ {
for i := offset; i < w+offset; i++ {
got := img.At(i, j)
want := color.RGBA{R: byte(i - offset), G: byte(j - offset), A: 0xff}
if image.Pt(i, j).In(sub) {
want = color.RGBA{B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageOptionsNegativeBoundsSet(t *testing.T) {
const (
w = 16
h = 16
)
pix0 := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (i + j*w)
pix0[idx] = byte(i)
pix0[idx+1] = byte(j)
pix0[idx+2] = 0
pix0[idx+3] = 0xff
}
}
const offset = -8
img := ebiten.NewImageWithOptions(image.Rect(offset, offset, w+offset, h+offset), nil)
img.WritePixels(pix0)
img.Set(-1, -2, color.RGBA{})
for j := offset; j < h+offset; j++ {
for i := offset; i < w+offset; i++ {
got := img.At(i, j)
want := color.RGBA{R: byte(i - offset), G: byte(j - offset), A: 0xff}
if i == -1 && j == -2 {
want = color.RGBA{}
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageOptionsNegativeBoundsDrawImage(t *testing.T) {
const (
w = 16
h = 16
offset = -8
)
dst := ebiten.NewImageWithOptions(image.Rect(offset, offset, w+offset, h+offset), nil)
src := ebiten.NewImageWithOptions(image.Rect(-1, -1, 1, 1), nil)
pix := make([]byte, 4*2*2)
for i := range pix {
pix[i] = 0xff
}
src.WritePixels(pix)
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(-1, -1)
op.GeoM.Scale(2, 3)
dst.DrawImage(src, op)
for j := offset; j < h+offset; j++ {
for i := offset; i < w+offset; i++ {
got := dst.At(i, j)
var want color.RGBA
if -2 <= i && i < 2 && -3 <= j && j < 3 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageOptionsNegativeBoundsDrawTriangles(t *testing.T) {
const (
w = 16
h = 16
offset = -8
)
dst := ebiten.NewImageWithOptions(image.Rect(offset, offset, w+offset, h+offset), nil)
src := ebiten.NewImageWithOptions(image.Rect(-1, -1, 1, 1), nil)
pix := make([]byte, 4*2*2)
for i := range pix {
pix[i] = 0xff
}
src.WritePixels(pix)
vs := []ebiten.Vertex{
{
DstX: -2,
DstY: -3,
SrcX: -1,
SrcY: -1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 2,
DstY: -3,
SrcX: 1,
SrcY: -1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: -2,
DstY: 3,
SrcX: -1,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 2,
DstY: 3,
SrcX: 1,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
dst.DrawTriangles(vs, is, src, nil)
for j := offset; j < h+offset; j++ {
for i := offset; i < w+offset; i++ {
got := dst.At(i, j)
var want color.RGBA
if -2 <= i && i < 2 && -3 <= j && j < 3 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageFromImageOptions(t *testing.T) {
r := image.Rect(-2, -3, 4, 5)
pix := make([]byte, 4*r.Dx()*r.Dy())
for i := range pix {
pix[i] = 0xff
}
src := &image.RGBA{
Pix: pix,
Stride: 4 * 2,
Rect: r,
}
op := &ebiten.NewImageFromImageOptions{
PreserveBounds: true,
}
img := ebiten.NewImageFromImageWithOptions(src, op)
if got, want := img.Bounds(), r; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
for j := r.Min.Y; j < r.Max.Y; j++ {
for i := r.Min.X; i < r.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageFromEbitenImageOptions(t *testing.T) {
r := image.Rect(-2, -3, 4, 5)
src := ebiten.NewImageWithOptions(r, nil)
pix := make([]byte, 4*r.Dx()*r.Dy())
for i := range pix {
pix[i] = 0xff
}
src.WritePixels(pix)
op := &ebiten.NewImageFromImageOptions{
PreserveBounds: true,
}
img := ebiten.NewImageFromImageWithOptions(src, op)
if got, want := img.Bounds(), r; got != want {
t.Errorf("got: %v, want: %v", got, want)
}
for j := r.Min.Y; j < r.Max.Y; j++ {
for i := r.Min.X; i < r.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #2159
func TestImageOptionsFill(t *testing.T) {
r0 := image.Rect(-2, -3, 4, 5)
img := ebiten.NewImageWithOptions(r0, nil)
img.Fill(color.RGBA{R: 0xff, A: 0xff})
for j := r0.Min.Y; j < r0.Max.Y; j++ {
for i := r0.Min.X; i < r0.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
r1 := image.Rect(-1, -2, 3, 4)
img.SubImage(r1).(*ebiten.Image).Fill(color.RGBA{G: 0xff, A: 0xff})
for j := r0.Min.Y; j < r0.Max.Y; j++ {
for i := r0.Min.X; i < r0.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, A: 0xff}
if image.Pt(i, j).In(r1) {
want = color.RGBA{G: 0xff, A: 0xff}
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #2159
func TestImageOptionsClear(t *testing.T) {
r0 := image.Rect(-2, -3, 4, 5)
img := ebiten.NewImageWithOptions(r0, nil)
img.Fill(color.RGBA{R: 0xff, A: 0xff})
img.Clear()
for j := r0.Min.Y; j < r0.Max.Y; j++ {
for i := r0.Min.X; i < r0.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
img.Fill(color.RGBA{R: 0xff, A: 0xff})
r1 := image.Rect(-1, -2, 3, 4)
img.SubImage(r1).(*ebiten.Image).Clear()
for j := r0.Min.Y; j < r0.Max.Y; j++ {
for i := r0.Min.X; i < r0.Max.X; i++ {
got := img.At(i, j)
want := color.RGBA{R: 0xff, A: 0xff}
if image.Pt(i, j).In(r1) {
want = color.RGBA{}
}
if got != want {
t.Errorf("img.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
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// Issue #2178
func TestImageTooManyDrawImage(t *testing.T) {
src := ebiten.NewImage(1, 1)
src.Fill(color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
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const (
w = 256
h = 256
)
dst := ebiten.NewImage(w, h)
op := &ebiten.DrawImageOptions{}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
op.GeoM.Reset()
op.GeoM.Translate(float64(i), float64(j))
dst.DrawImage(src, op)
}
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if got, want := dst.At(i, j), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
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func TestImageTooManyDrawImage2(t *testing.T) {
src := ebiten.NewImage(1, 1)
src.Fill(color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
const (
w = 512
h = 512
)
dst := ebiten.NewImage(w, h)
posToColor := func(i, j int) color.RGBA {
return color.RGBA{
R: byte(i),
G: byte(j),
B: 0xff,
A: 0xff,
}
}
op := &ebiten.DrawImageOptions{}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
op.GeoM.Reset()
op.GeoM.Translate(float64(i), float64(j))
op.ColorScale.Reset()
op.ColorScale.ScaleWithColor(posToColor(i, j))
dst.DrawImage(src, op)
}
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if got, want := dst.At(i, j).(color.RGBA), posToColor(i, j); !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
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// Issue #2178
func TestImageTooManyDrawTriangles(t *testing.T) {
img := ebiten.NewImage(3, 3)
img.Fill(color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
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src := img.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
const (
w = 128
h = 64
)
dst := ebiten.NewImage(w, h)
var vertices []ebiten.Vertex
var indices []uint16
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
n := uint16(len(vertices))
vertices = append(vertices,
ebiten.Vertex{
DstX: float32(i),
DstY: float32(j),
SrcX: 1,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
ebiten.Vertex{
DstX: float32(i) + 1,
DstY: float32(j),
SrcX: 2,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
ebiten.Vertex{
DstX: float32(i),
DstY: float32(j) + 1,
SrcX: 1,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
ebiten.Vertex{
DstX: float32(i) + 1,
DstY: float32(j) + 1,
SrcX: 2,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
)
indices = append(indices, n, n+1, n+2, n+1, n+2, n+3)
}
}
dst.DrawTriangles(vertices, indices, src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
if got, want := dst.At(i, j), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageSetOverSet(t *testing.T) {
img := ebiten.NewImage(1, 1)
img.Set(0, 0, color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff})
if got, want := img.At(0, 0), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Apply the change by 'Set' by calling DrawImage.
dummy := ebiten.NewImage(1, 1)
img.DrawImage(dummy, nil)
if got, want := img.At(0, 0), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
img.Set(0, 0, color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80})
if got, want := img.At(0, 0), (color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
// Apply the change by 'Set' again.
img.DrawImage(dummy, nil)
if got, want := img.At(0, 0), (color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Issue #2204
func TestImageTooManyConstantBuffersInDirectX(t *testing.T) {
src := ebiten.NewImage(3, 3)
src.Fill(color.White)
src = src.SubImage(image.Rect(1, 1, 2, 2)).(*ebiten.Image)
vs := []ebiten.Vertex{
{
DstX: 0, DstY: 0, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 1, ColorB: 1, ColorA: 1,
},
{
DstX: 16, DstY: 0, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 1, ColorB: 1, ColorA: 1,
},
{
DstX: 0, DstY: 16, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 1, ColorB: 1, ColorA: 1,
},
{
DstX: 16, DstY: 16, SrcX: 1, SrcY: 1,
ColorR: 1, ColorG: 1, ColorB: 1, ColorA: 1,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
dst0 := ebiten.NewImage(16, 16)
dst1 := ebiten.NewImage(16, 16)
op := &ebiten.DrawTrianglesOptions{
FillRule: ebiten.FillRuleEvenOdd,
}
for i := 0; i < 100; i++ {
dst0.DrawTriangles(vs, is, src, op)
dst1.DrawTriangles(vs, is, src, op)
}
if got, want := dst0.At(0, 0), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
if got, want := dst1.At(0, 0), (color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
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func TestImageColorMAndScale(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
src.Fill(color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80})
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vs := []ebiten.Vertex{
{
SrcX: 0,
SrcY: 0,
DstX: 0,
DstY: 0,
ColorR: 0.5,
ColorG: 0.25,
ColorB: 0.5,
ColorA: 0.75,
},
{
SrcX: w,
SrcY: 0,
DstX: w,
DstY: 0,
ColorR: 0.5,
ColorG: 0.25,
ColorB: 0.5,
ColorA: 0.75,
},
{
SrcX: 0,
SrcY: h,
DstX: 0,
DstY: h,
ColorR: 0.5,
ColorG: 0.25,
ColorB: 0.5,
ColorA: 0.75,
},
{
SrcX: w,
SrcY: h,
DstX: w,
DstY: h,
ColorR: 0.5,
ColorG: 0.25,
ColorB: 0.5,
ColorA: 0.75,
},
}
is := []uint16{0, 1, 2, 1, 2, 3}
for _, format := range []ebiten.ColorScaleMode{
ebiten.ColorScaleModeStraightAlpha,
ebiten.ColorScaleModePremultipliedAlpha,
} {
format := format
t.Run(fmt.Sprintf("format%d", format), func(t *testing.T) {
dst := ebiten.NewImage(w, h)
op := &ebiten.DrawTrianglesOptions{}
op.ColorM.Translate(0.25, 0.25, 0.25, 0)
op.ColorScaleMode = format
dst.DrawTriangles(vs, is, src, op)
got := dst.At(0, 0).(color.RGBA)
alphaBeforeScale := 0.5
var want color.RGBA
switch format {
case ebiten.ColorScaleModeStraightAlpha:
want = color.RGBA{
R: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.5 * 0.75)),
G: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.25 * 0.75)),
B: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.5 * 0.75)),
A: byte(math.Floor(0xff * alphaBeforeScale * 0.75)),
}
case ebiten.ColorScaleModePremultipliedAlpha:
want = color.RGBA{
R: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.5)),
G: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.25)),
B: byte(math.Floor(0xff * (0.5/alphaBeforeScale + 0.25) * alphaBeforeScale * 0.5)),
A: byte(math.Floor(0xff * alphaBeforeScale * 0.75)),
}
}
if !sameColors(got, want, 2) {
t.Errorf("got: %v, want: %v", got, want)
}
})
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}
}
func TestImageBlendOperation(t *testing.T) {
const w, h = 16, 1
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
dstColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 17), byte(4*i*17 + 1), byte(4*i*17 + 2), byte(4*i*17 + 3)
}
srcColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 13), byte(4*i*13 + 1), byte(4*i*13 + 2), byte(4*i*13 + 3)
}
clamp := func(x int) byte {
if x > 255 {
return 255
}
if x < 0 {
return 0
}
return byte(x)
}
dstPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := dstColor(i)
dstPix[4*i] = r
dstPix[4*i+1] = g
dstPix[4*i+2] = b
dstPix[4*i+3] = a
}
srcPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := srcColor(i)
srcPix[4*i] = r
srcPix[4*i+1] = g
srcPix[4*i+2] = b
srcPix[4*i+3] = a
}
src.WritePixels(srcPix)
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operations := []ebiten.BlendOperation{
ebiten.BlendOperationAdd,
ebiten.BlendOperationSubtract,
ebiten.BlendOperationReverseSubtract,
}
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for _, rgbOp := range operations {
for _, alphaOp := range operations {
// Reset the destination state.
dst.WritePixels(dstPix)
op := &ebiten.DrawImageOptions{}
op.Blend = ebiten.Blend{
BlendFactorSourceRGB: ebiten.BlendFactorOne,
BlendFactorSourceAlpha: ebiten.BlendFactorOne,
BlendFactorDestinationRGB: ebiten.BlendFactorOne,
BlendFactorDestinationAlpha: ebiten.BlendFactorOne,
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BlendOperationRGB: rgbOp,
BlendOperationAlpha: alphaOp,
}
dst.DrawImage(src, op)
for i := 0; i < w; i++ {
got := dst.At(i, 0).(color.RGBA)
sr, sg, sb, sa := srcColor(i)
dr, dg, db, da := dstColor(i)
var want color.RGBA
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switch rgbOp {
case ebiten.BlendOperationAdd:
want.R = clamp(int(sr) + int(dr))
want.G = clamp(int(sg) + int(dg))
want.B = clamp(int(sb) + int(db))
case ebiten.BlendOperationSubtract:
want.R = clamp(int(sr) - int(dr))
want.G = clamp(int(sg) - int(dg))
want.B = clamp(int(sb) - int(db))
case ebiten.BlendOperationReverseSubtract:
want.R = clamp(int(dr) - int(sr))
want.G = clamp(int(dg) - int(sg))
want.B = clamp(int(db) - int(sb))
}
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switch alphaOp {
case ebiten.BlendOperationAdd:
want.A = clamp(int(sa) + int(da))
case ebiten.BlendOperationSubtract:
want.A = clamp(int(sa) - int(da))
case ebiten.BlendOperationReverseSubtract:
want.A = clamp(int(da) - int(sa))
}
if !sameColors(got, want, 1) {
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t.Errorf("dst.At(%d, 0): operations: %d, %d: got: %v, want: %v", i, rgbOp, alphaOp, got, want)
}
}
}
}
}
func TestImageBlendOperationMinAndMax(t *testing.T) {
const w, h = 16, 1
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
dstColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 17), byte(4*i*17 + 1), byte(4*i*17 + 2), byte(4*i*17 + 3)
}
srcColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 13), byte(4*i*13 + 1), byte(4*i*13 + 2), byte(4*i*13 + 3)
}
dstPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := dstColor(i)
dstPix[4*i] = r
dstPix[4*i+1] = g
dstPix[4*i+2] = b
dstPix[4*i+3] = a
}
srcPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := srcColor(i)
srcPix[4*i] = r
srcPix[4*i+1] = g
srcPix[4*i+2] = b
srcPix[4*i+3] = a
}
src.WritePixels(srcPix)
operations := []ebiten.BlendOperation{
ebiten.BlendOperationMin,
ebiten.BlendOperationMax,
}
for _, rgbOp := range operations {
for _, alphaOp := range operations {
// Reset the destination state.
dst.WritePixels(dstPix)
op := &ebiten.DrawImageOptions{}
// Use the default blend factors, and confirm that the factors are ignored.
op.Blend = ebiten.Blend{
BlendFactorSourceRGB: ebiten.BlendFactorDefault,
BlendFactorSourceAlpha: ebiten.BlendFactorDefault,
BlendFactorDestinationRGB: ebiten.BlendFactorDefault,
BlendFactorDestinationAlpha: ebiten.BlendFactorDefault,
BlendOperationRGB: rgbOp,
BlendOperationAlpha: alphaOp,
}
dst.DrawImage(src, op)
for i := 0; i < w; i++ {
got := dst.At(i, 0).(color.RGBA)
sr, sg, sb, sa := srcColor(i)
dr, dg, db, da := dstColor(i)
var want color.RGBA
switch rgbOp {
case ebiten.BlendOperationMin:
want.R = min(sr, dr)
want.G = min(sg, dg)
want.B = min(sb, db)
case ebiten.BlendOperationMax:
want.R = max(sr, dr)
want.G = max(sg, dg)
want.B = max(sb, db)
}
switch alphaOp {
case ebiten.BlendOperationMin:
want.A = min(sa, da)
case ebiten.BlendOperationMax:
want.A = max(sa, da)
}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, 0): operations: %d, %d: got: %v, want: %v", i, rgbOp, alphaOp, got, want)
}
}
}
}
}
func TestImageBlendFactor(t *testing.T) {
if skipTooSlowTests(t) {
return
}
const w, h = 16, 1
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
dstColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 17), byte(4*i*17 + 1), byte(4*i*17 + 2), byte(4*i*17 + 3)
}
srcColor := func(i int) (byte, byte, byte, byte) {
return byte(4 * i * 13), byte(4*i*13 + 1), byte(4*i*13 + 2), byte(4*i*13 + 3)
}
colorToFloats := func(r, g, b, a byte) (float64, float64, float64, float64) {
return float64(r) / 0xff, float64(g) / 0xff, float64(b) / 0xff, float64(a) / 0xff
}
clamp := func(x int) byte {
if x > 255 {
return 255
}
if x < 0 {
return 0
}
return byte(x)
}
dstPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := dstColor(i)
dstPix[4*i] = r
dstPix[4*i+1] = g
dstPix[4*i+2] = b
dstPix[4*i+3] = a
}
srcPix := make([]byte, 4*w*h)
for i := 0; i < w; i++ {
r, g, b, a := srcColor(i)
srcPix[4*i] = r
srcPix[4*i+1] = g
srcPix[4*i+2] = b
srcPix[4*i+3] = a
}
src.WritePixels(srcPix)
factors := []ebiten.BlendFactor{
ebiten.BlendFactorZero,
ebiten.BlendFactorOne,
ebiten.BlendFactorSourceColor,
ebiten.BlendFactorOneMinusSourceColor,
ebiten.BlendFactorSourceAlpha,
ebiten.BlendFactorOneMinusSourceAlpha,
ebiten.BlendFactorDestinationColor,
ebiten.BlendFactorOneMinusDestinationColor,
ebiten.BlendFactorDestinationAlpha,
ebiten.BlendFactorOneMinusDestinationAlpha,
}
for _, srcRGBFactor := range factors {
for _, srcAlphaFactor := range factors {
for _, dstRGBFactor := range factors {
for _, dstAlphaFactor := range factors {
// Reset the destination state.
dst.WritePixels(dstPix)
op := &ebiten.DrawImageOptions{}
op.Blend = ebiten.Blend{
BlendFactorSourceRGB: srcRGBFactor,
BlendFactorSourceAlpha: srcAlphaFactor,
BlendFactorDestinationRGB: dstRGBFactor,
BlendFactorDestinationAlpha: dstAlphaFactor,
BlendOperationRGB: ebiten.BlendOperationAdd,
BlendOperationAlpha: ebiten.BlendOperationAdd,
}
dst.DrawImage(src, op)
for i := 0; i < w; i++ {
got := dst.At(i, 0).(color.RGBA)
sr, sg, sb, sa := colorToFloats(srcColor(i))
dr, dg, db, da := colorToFloats(dstColor(i))
var r, g, b, a float64
switch srcRGBFactor {
case ebiten.BlendFactorZero:
r += 0 * sr
g += 0 * sg
b += 0 * sb
case ebiten.BlendFactorOne:
r += 1 * sr
g += 1 * sg
b += 1 * sb
case ebiten.BlendFactorSourceColor:
r += sr * sr
g += sg * sg
b += sb * sb
case ebiten.BlendFactorOneMinusSourceColor:
r += (1 - sr) * sr
g += (1 - sg) * sg
b += (1 - sb) * sb
case ebiten.BlendFactorSourceAlpha:
r += sa * sr
g += sa * sg
b += sa * sb
case ebiten.BlendFactorOneMinusSourceAlpha:
r += (1 - sa) * sr
g += (1 - sa) * sg
b += (1 - sa) * sb
case ebiten.BlendFactorDestinationColor:
r += dr * sr
g += dg * sg
b += db * sb
case ebiten.BlendFactorOneMinusDestinationColor:
r += (1 - dr) * sr
g += (1 - dg) * sg
b += (1 - db) * sb
case ebiten.BlendFactorDestinationAlpha:
r += da * sr
g += da * sg
b += da * sb
case ebiten.BlendFactorOneMinusDestinationAlpha:
r += (1 - da) * sr
g += (1 - da) * sg
b += (1 - da) * sb
}
switch srcAlphaFactor {
case ebiten.BlendFactorZero:
a += 0 * sa
case ebiten.BlendFactorOne:
a += 1 * sa
case ebiten.BlendFactorSourceColor, ebiten.BlendFactorSourceAlpha:
a += sa * sa
case ebiten.BlendFactorOneMinusSourceColor, ebiten.BlendFactorOneMinusSourceAlpha:
a += (1 - sa) * sa
case ebiten.BlendFactorDestinationColor, ebiten.BlendFactorDestinationAlpha:
a += da * sa
case ebiten.BlendFactorOneMinusDestinationColor, ebiten.BlendFactorOneMinusDestinationAlpha:
a += (1 - da) * sa
}
switch dstRGBFactor {
case ebiten.BlendFactorZero:
r += 0 * dr
g += 0 * dg
b += 0 * db
case ebiten.BlendFactorOne:
r += 1 * dr
g += 1 * dg
b += 1 * db
case ebiten.BlendFactorSourceColor:
r += sr * dr
g += sg * dg
b += sb * db
case ebiten.BlendFactorOneMinusSourceColor:
r += (1 - sr) * dr
g += (1 - sg) * dg
b += (1 - sb) * db
case ebiten.BlendFactorSourceAlpha:
r += sa * dr
g += sa * dg
b += sa * db
case ebiten.BlendFactorOneMinusSourceAlpha:
r += (1 - sa) * dr
g += (1 - sa) * dg
b += (1 - sa) * db
case ebiten.BlendFactorDestinationColor:
r += dr * dr
g += dg * dg
b += db * db
case ebiten.BlendFactorOneMinusDestinationColor:
r += (1 - dr) * dr
g += (1 - dg) * dg
b += (1 - db) * db
case ebiten.BlendFactorDestinationAlpha:
r += da * dr
g += da * dg
b += da * db
case ebiten.BlendFactorOneMinusDestinationAlpha:
r += (1 - da) * dr
g += (1 - da) * dg
b += (1 - da) * db
}
switch dstAlphaFactor {
case ebiten.BlendFactorZero:
a += 0 * da
case ebiten.BlendFactorOne:
a += 1 * da
case ebiten.BlendFactorSourceColor, ebiten.BlendFactorSourceAlpha:
a += sa * da
case ebiten.BlendFactorOneMinusSourceColor, ebiten.BlendFactorOneMinusSourceAlpha:
a += (1 - sa) * da
case ebiten.BlendFactorDestinationColor, ebiten.BlendFactorDestinationAlpha:
a += da * da
case ebiten.BlendFactorOneMinusDestinationColor, ebiten.BlendFactorOneMinusDestinationAlpha:
a += (1 - da) * da
}
want := color.RGBA{
R: clamp(int(r * 0xff)),
G: clamp(int(g * 0xff)),
B: clamp(int(b * 0xff)),
A: clamp(int(a * 0xff)),
}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, 0): factors: %d, %d, %d, %d: got: %v, want: %v", i, srcRGBFactor, srcAlphaFactor, dstRGBFactor, dstAlphaFactor, got, want)
}
}
}
}
}
}
}
func TestImageAntiAlias(t *testing.T) {
// This value depends on internal/ui.bigOffscreenScale. Sync this.
const bigOffscreenScale = 2
const w, h = 272, 208
dst0 := ebiten.NewImage(w, h)
dst1 := ebiten.NewImage(w, h)
tmp := ebiten.NewImage(w*bigOffscreenScale, h*bigOffscreenScale)
src := ebiten.NewImage(3, 3)
src.Fill(color.RGBA{R: 0x24, G: 0x3f, B: 0x6a, A: 0x88})
for _, blend := range []ebiten.Blend{
{}, // Default
ebiten.BlendClear,
ebiten.BlendCopy,
ebiten.BlendSourceOver,
ebiten.BlendDestinationOver,
ebiten.BlendXor,
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ebiten.BlendLighter,
} {
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rnd := rand.New(rand.NewPCG(0, 0))
max := func(x, y, z byte) byte {
if x >= y && x >= z {
return x
}
if y >= x && y >= z {
return y
}
return z
}
dstPix := make([]byte, 4*w*h)
for i := 0; i < w*h; i++ {
n := rnd.Int()
r, g, b := byte(n), byte(n>>8), byte(n>>16)
a := max(r, g, b)
dstPix[4*i] = r
dstPix[4*i+1] = g
dstPix[4*i+2] = b
dstPix[4*i+3] = a
}
dst0.WritePixels(dstPix)
dst1.WritePixels(dstPix)
tmp.Clear()
// Create an actual result.
op := &ebiten.DrawTrianglesOptions{}
op.Blend = blend
op.AntiAlias = true
vs0 := []ebiten.Vertex{
{
DstX: w / 4,
DstY: h / 4,
SrcX: 1,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 2 * w / 4,
DstY: h / 4,
SrcX: 2,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: w / 4,
DstY: 2 * h / 4,
SrcX: 1,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
is := []uint16{0, 1, 2}
dst0.DrawTriangles(vs0, is, src, op)
vs1 := []ebiten.Vertex{
{
DstX: 2 * w / 4,
DstY: 3 * h / 4,
SrcX: 1,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 3 * w / 4,
DstY: 2 * h / 4,
SrcX: 2,
SrcY: 1,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
{
DstX: 3 * w / 4,
DstY: 3 * h / 4,
SrcX: 2,
SrcY: 2,
ColorR: 1,
ColorG: 1,
ColorB: 1,
ColorA: 1,
},
}
dst0.DrawTriangles(vs1, is, src, op)
// Create an expected result.
// Copy an enlarged destination image to the offscreen.
opCopy := &ebiten.DrawImageOptions{}
opCopy.GeoM.Scale(bigOffscreenScale, bigOffscreenScale)
opCopy.Blend = ebiten.BlendCopy
tmp.DrawImage(dst1, opCopy)
// Render the vertices onto the offscreen.
for i := range vs0 {
vs0[i].DstX *= 2
vs0[i].DstY *= 2
}
for i := range vs1 {
vs1[i].DstX *= 2
vs1[i].DstY *= 2
}
op = &ebiten.DrawTrianglesOptions{}
op.Blend = blend
tmp.DrawTriangles(vs0, is, src, op)
tmp.DrawTriangles(vs1, is, src, op)
// Render a shrunk offscreen image onto the destination.
opShrink := &ebiten.DrawImageOptions{}
opShrink.GeoM.Scale(1.0/bigOffscreenScale, 1.0/bigOffscreenScale)
opShrink.Filter = ebiten.FilterLinear
opShrink.Blend = ebiten.BlendCopy
dst1.DrawImage(tmp, opShrink)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst0.At(i, j).(color.RGBA)
want := dst1.At(i, j).(color.RGBA)
if !sameColors(got, want, 2) {
t.Errorf("At(%d, %d), blend: %v, got: %v, want: %v", i, j, blend, got, want)
}
}
}
}
}
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func TestImageColorMScale(t *testing.T) {
const w, h = 16, 16
dst0 := ebiten.NewImage(w, h)
dst1 := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
src.Fill(color.RGBA{R: 0x24, G: 0x3f, B: 0x6a, A: 0x88})
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// As the ColorM is a diagonal matrix, a built-in shader for a color matrix is NOT used.
op := &ebiten.DrawImageOptions{}
op.ColorM.Scale(0.3, 0.4, 0.5, 0.6)
dst0.DrawImage(src, op)
// As the ColorM is not a diagonal matrix, a built-in shader for a color matrix is used.
op = &ebiten.DrawImageOptions{}
op.ColorM.Scale(0.3, 0.4, 0.5, 0.6)
op.ColorM.Translate(0, 0, 0, 1e-4)
dst1.DrawImage(src, op)
got := dst0.At(0, 0)
want := dst1.At(0, 0)
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageColorScaleAndColorM(t *testing.T) {
const w, h = 16, 16
dst0 := ebiten.NewImage(w, h)
dst1 := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
src.Fill(color.RGBA{R: 0x24, G: 0x3f, B: 0x6a, A: 0x88})
// ColorScale is applied to premultiplied-alpha colors.
op := &ebiten.DrawImageOptions{}
op.ColorScale.Scale(0.3*0.6, 0.4*0.6, 0.5*0.6, 0.6)
dst0.DrawImage(src, op)
// ColorM.Scale is applied to straight-alpha colors.
op = &ebiten.DrawImageOptions{}
op.ColorM.Scale(0.3, 0.4, 0.5, 0.6)
dst1.DrawImage(src, op)
got := dst0.At(0, 0)
want := dst1.At(0, 0)
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Issue #2428
func TestImageSetAndSubImage(t *testing.T) {
const w, h = 16, 16
img := ebiten.NewImage(w, h)
img.Set(1, 1, color.RGBA{R: 0xff, A: 0xff})
got := img.SubImage(image.Rect(0, 0, w, h)).At(1, 1).(color.RGBA)
want := color.RGBA{R: 0xff, A: 0xff}
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
// Issue #2611
func TestImageDrawTrianglesWithGreaterIndexThanVerticesCount(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawTriangles must panic but not")
}
}()
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
src := ebiten.NewImage(w, h)
vs := make([]ebiten.Vertex, 4)
is := []uint16{0, 1, 2, 1, 2, 4}
dst.DrawTriangles(vs, is, src, nil)
}
// Issue #2611
func TestImageDrawTrianglesShaderWithGreaterIndexThanVerticesCount(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("DrawTrianglesShader must panic but not")
}
}()
const w, h = 16, 16
dst := ebiten.NewImage(w, h)
vs := make([]ebiten.Vertex, 4)
is := []uint16{0, 1, 2, 1, 2, 4}
shader, err := ebiten.NewShader([]byte(`
package main
func Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {
return color
}
`))
if err != nil {
t.Fatalf("could not compile shader: %v", err)
}
dst.DrawTrianglesShader(vs, is, shader, nil)
}
// Issue #2733
func TestImageGeoMAfterDraw(t *testing.T) {
src := ebiten.NewImage(1, 1)
dst := ebiten.NewImageWithOptions(image.Rect(-1, -1, 0, 0), nil)
op0 := &ebiten.DrawImageOptions{}
dst.DrawImage(src, op0)
if x, y := op0.GeoM.Apply(0, 0); x != 0 || y != 0 {
t.Errorf("got: (%0.2f, %0.2f), want: (0, 0)", x, y)
}
s, err := ebiten.NewShader([]byte(`//kage:unit pixels
package main
func Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {
return vec4(1)
}
`))
if err != nil {
t.Fatal(err)
}
op1 := &ebiten.DrawRectShaderOptions{}
dst.DrawRectShader(1, 1, s, op1)
if x, y := op1.GeoM.Apply(0, 0); x != 0 || y != 0 {
t.Errorf("got: (%0.2f, %0.2f), want: (0, 0)", x, y)
}
}
func TestImageWritePixelAndDispose(t *testing.T) {
const (
w = 16
h = 16
)
img := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for i := range pix {
pix[i] = 0xff
}
img.WritePixels(pix)
img.Dispose()
// Confirm that any pixel information is invalidated after Dispose is called.
if got, want := img.At(0, 0), (color.RGBA{}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageWritePixelAndDeallocate(t *testing.T) {
const (
w = 16
h = 16
)
img := ebiten.NewImage(w, h)
pix := make([]byte, 4*w*h)
for i := range pix {
pix[i] = 0xff
}
img.WritePixels(pix)
img.Deallocate()
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// Confirm that any pixel information is cleared after Deallocate is called.
if got, want := img.At(0, 0), (color.RGBA{}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageDrawImageAfterDeallocation(t *testing.T) {
src, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := src.Bounds().Dx(), src.Bounds().Dy()
dst := ebiten.NewImage(w, h)
dst.DrawImage(src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := src.At(i, j)
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
// Even after deallocating the image, the image is still available.
dst.Deallocate()
dst.DrawImage(src, nil)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := src.At(i, j)
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #2798
func TestImageInvalidPremultipliedAlphaColor(t *testing.T) {
// This test checks the rendering result when Set and WritePixels use an invalid premultiplied alpha color.
// The result values are kept and not clamped.
const (
w = 16
h = 16
)
dst := ebiten.NewImage(w, h)
dst.Set(0, 0, color.RGBA{R: 0xff, G: 0xc0, B: 0x80, A: 0x40})
dst.Set(0, 1, color.RGBA{R: 0xff, G: 0xc0, B: 0x80, A: 0x00})
if got, want := dst.At(0, 0).(color.RGBA), (color.RGBA{R: 0xff, G: 0xc0, B: 0x80, A: 0x40}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
if got, want := dst.At(0, 1).(color.RGBA), (color.RGBA{R: 0xff, G: 0xc0, B: 0x80, A: 0x00}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
pix[4*(j*16+i)] = byte(i)
pix[4*(j*16+i)+1] = byte(j)
pix[4*(j*16+i)+2] = 0x80
pix[4*(j*16+i)+3] = byte(i - j)
}
}
dst.WritePixels(pix)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := dst.At(i, j)
want := color.RGBA{R: byte(i), G: byte(j), B: 0x80, A: byte(i - j)}
if got != want {
t.Errorf("At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}