ebiten/image_test.go
divVerent 62229e82a6
Pre-failing test for color interpolation during rendering. (#2001)
Before #1996, this failed with:

image_test.go:1997: At(1, 0): got: {64 64 128 255}, want: {0 128 128 255}

The difference is:

- Before, colors were interpolated in straight-color space:
  - Background: {0 0 255 255}
  - Vertex A: {255 0 0 0}
  - Vertex B: {0 255 0 255}
  - Interpolated: {128 128 0 128}
  - Premultiplied: {64 64 0 128}
  - Onto Background: {64 64 128 255}
- After, colors are interpolated in premultiplied space:
  - Background: {0 0 255 255}
  - Vertex A: {255 0 0 0}
  - Vertex A premultiplied: {0 0 0 0}
  - Vertex B: {0 255 0 255}
  - Vertex B premultiplied: {0 255 0 255}
  - Interpolated: {0 128 0 128}
  - Onto Background: {0 128 128 255}

This DIFFERS from the sample fragment shader, which returns the color as is
(Kage allows vertex color values to be used for arbitrary purposes and
interpolates independently):

- Shader sample:
  - Background: {0 0 255 255}
  - Vertex A: {255 0 0 0}
  - Vertex B: {0 255 0 255}
  - Interpolated: {128 128 0 128}
  - Onto Background: {128 128 128 255}

as the blend function is `GL_ONE` / `GL_ONE_MINUS_SRC_ALPHA`. This shader behavior
is unchanged but has been documented by #1996.
2022-02-24 03:12:33 +09:00

2755 lines
60 KiB
Go

// 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"
"image/color"
"image/draw"
_ "image/png"
"math"
"math/rand"
"runtime"
"testing"
"time"
"github.com/hajimehoshi/ebiten/v2"
"github.com/hajimehoshi/ebiten/v2/examples/resources/images"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
t "github.com/hajimehoshi/ebiten/v2/internal/testing"
)
// maxImageSize is a maximum image size that should work in almost every environment.
const maxImageSize = 4096 - 2
func init() {
rand.Seed(time.Now().UnixNano())
}
func skipTooSlowTests(t *testing.T) bool {
if testing.Short() {
t.Skip("skipping test in short mode")
return true
}
if runtime.GOOS == "js" {
t.Skip("too slow or fragile on Wasm")
return true
}
return false
}
func TestMain(m *testing.M) {
ebiten.PanicOnErrorAtImageAt()
t.MainWithRunLoop(m)
}
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
}
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
}
func TestImagePixels(t *testing.T) {
img0, img, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
if got := img0.Bounds().Size(); got != img.Bounds().Size() {
t.Fatalf("img size: got %d; want %d", got, img.Bounds().Size())
}
w, h := img0.Bounds().Size().X, img0.Bounds().Size().Y
// 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++ {
got := img0.At(i, j)
want := color.RGBAModel.Convert(img.At(i, j))
if got != want {
t.Errorf("img0 At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
}
func TestImageComposition(t *testing.T) {
img2Color := color.NRGBA{0x24, 0x3f, 0x6a, 0x88}
img3Color := color.NRGBA{0x85, 0xa3, 0x08, 0xd3}
// TODO: Rename this to img0
img1, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img1.Bounds().Size().X, img1.Bounds().Size().Y
img2 := ebiten.NewImage(w, h)
img3 := ebiten.NewImage(w, h)
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)
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)
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) {
t.Errorf("img_12_3.At(%d, %d) = %#v; img_1_23.At(%[1]d, %[2]d) = %#[4]v", i, j, c1, c2)
}
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 panicing.
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)
}
func TestImageScale(t *testing.T) {
for _, scale := range []int{2, 3, 4} {
img0, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1 := ebiten.NewImage(w*scale, h*scale)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(float64(scale), float64(scale))
img1.DrawImage(img0, op)
for j := 0; j < h*scale; j++ {
for i := 0; i < w*scale; i++ {
c0 := img0.At(i/scale, j/scale).(color.RGBA)
c1 := img1.At(i, j).(color.RGBA)
if c0 != c1 {
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)
}
}
}
}
}
func TestImage90DegreeRotate(t *testing.T) {
img0, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1 := ebiten.NewImage(h, w)
op := &ebiten.DrawImageOptions{}
op.GeoM.Rotate(math.Pi / 2)
op.GeoM.Translate(float64(h), 0)
img1.DrawImage(img0, op)
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)
}
}
}
}
func TestImageDotByDotInversion(t *testing.T) {
img0, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1 := ebiten.NewImage(w, h)
op := &ebiten.DrawImageOptions{}
op.GeoM.Rotate(math.Pi)
op.GeoM.Translate(float64(w), float64(h))
img1.DrawImage(img0, op)
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 TestImageReplacePixels(t *testing.T) {
// Create a dummy image so that the shared texture is used and origImg's position is shfited.
dummyImg := ebiten.NewImageFromImage(image.NewRGBA(image.Rect(0, 0, 16, 16)))
defer dummyImg.Dispose()
_, origImg, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
// Convert to *image.RGBA just in case.
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)
img0.ReplacePixels(img.Pix)
for j := 0; j < img0.Bounds().Size().Y; j++ {
for i := 0; i < img0.Bounds().Size().X; i++ {
got := img0.At(i, j)
want := img.At(i, j)
if got != want {
t.Errorf("img0 At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
p := make([]uint8, 4*size.X*size.Y)
for i := range p {
p[i] = 0x80
}
img0.ReplacePixels(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().Size().Y; j++ {
for i := 0; i < img0.Bounds().Size().X; i++ {
got := img0.At(i, j)
want := color.RGBA{0x80, 0x80, 0x80, 0x80}
if got != want {
t.Errorf("img0 At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
}
func TestImageReplacePixelsNil(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("ReplacePixels(nil) must panic")
}
}()
img := ebiten.NewImage(16, 16)
img.Fill(color.White)
img.ReplacePixels(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)
}
}
func min(a, b int) int {
if a < b {
return a
}
return b
}
func TestImageCompositeModeLighter(t *testing.T) {
img0, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
w, h := img0.Size()
img1 := ebiten.NewImage(w, h)
img1.Fill(color.RGBA{0x01, 0x02, 0x03, 0x04})
op := &ebiten.DrawImageOptions{}
op.CompositeMode = ebiten.CompositeModeLighter
img1.DrawImage(img0, op)
for j := 0; j < img1.Bounds().Size().Y; j++ {
for i := 0; i < img1.Bounds().Size().X; i++ {
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 {
t.Errorf("img1 At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
}
func TestNewImageFromEbitenImage(t *testing.T) {
img, _, err := openEbitenImage()
if err != nil {
t.Fatal(err)
return
}
_ = ebiten.NewImageFromImage(img)
}
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.Size()
if w2 != sw {
t.Errorf("eimg Width: got %#v; want %#v", w2, sw)
}
if h2 != sh {
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 {
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{0x80, 0x80, 0x80, 0x80}
if got != want {
t.Errorf("img At(%d, %d): got %#v; want %#v", i, j, got, want)
}
}
}
}
// 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{0xff, 0xff, 0xff, 0xff}
if got != want {
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 {
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?
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.ReplacePixels(pixels)
img1 := ebiten.NewImage(img1Width, img1Height)
red := color.RGBA{0xff, 0, 0, 0xff}
transparent := color.RGBA{0, 0, 0, 0}
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.Size()
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 := graphics.QuadIndices()
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)
}
}
}
}
}
}
// Issue #419
func TestImageTooManyFill(t *testing.T) {
const width = 1024
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++ {
c := indexToColor(i)
src.Fill(color.RGBA{c, c, c, 0xff})
op := &ebiten.DrawImageOptions{}
op.GeoM.Translate(float64(i), 0)
dst.DrawImage(src, op)
}
for i := 0; i < width; i++ {
c := indexToColor(i)
got := dst.At(i, 0).(color.RGBA)
want := color.RGBA{c, c, c, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %#v, want: %#v", i, 0, got, want)
}
}
}
func BenchmarkDrawImage(b *testing.B) {
img0 := ebiten.NewImage(16, 16)
img1 := ebiten.NewImage(16, 16)
op := &ebiten.DrawImageOptions{}
for i := 0; i < b.N; i++ {
img0.DrawImage(img1, op)
}
}
func TestImageLinearGradiation(t *testing.T) {
img0 := ebiten.NewImage(2, 2)
img0.ReplacePixels([]byte{
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{}
op.GeoM.Scale(w, h)
op.GeoM.Translate(-w/4, -h/4)
op.Filter = ebiten.FilterLinear
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 {
t.Errorf("img1.At(%d, %d).R must be in between 0x01 and 0xfe but %#v", i, j, c)
}
}
}
}
func TestImageOutside(t *testing.T) {
src := ebiten.NewImage(5, 10) // internal texture size is 8x16.
dst := ebiten.NewImage(4, 4)
src.Fill(color.RGBA{0xff, 0, 0, 0xff})
cases := []struct {
X, Y, Width, Height int
}{
{-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
}
for _, c := range cases {
dst.Clear()
op := &ebiten.DrawImageOptions{}
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)
for j := 0; j < 4; j++ {
for i := 0; i < 4; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{0, 0, 0, 0}
if got != want {
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)
}
}
}
}
}
func TestImageOutsideUpperLeft(t *testing.T) {
src := ebiten.NewImage(4, 4)
dst1 := ebiten.NewImage(16, 16)
dst2 := ebiten.NewImage(16, 16)
src.Fill(color.RGBA{0xff, 0, 0, 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++ {
got := dst1.At(i, j).(color.RGBA)
want := dst2.At(i, j).(color.RGBA)
if got != want {
t.Errorf("got: dst1.At(%d, %d): %#v, want: dst2.At(%d, %d): %#v", i, j, got, i, j, want)
}
}
}
}
func TestImageSize(t *testing.T) {
const (
w = 17
h = 31
)
img := ebiten.NewImage(w, h)
gotW, gotH := img.Size()
if gotW != w {
t.Errorf("got: %d, want: %d", gotW, w)
}
if gotH != h {
t.Errorf("got: %d, want: %d", gotH, h)
}
}
func TestImageSize1(t *testing.T) {
src := ebiten.NewImage(1, 1)
dst := ebiten.NewImage(1, 1)
src.Fill(color.White)
dst.DrawImage(src, nil)
got := src.At(0, 0).(color.RGBA)
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("got: %#v, want: %#v", got, want)
}
}
// 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)
pix := make([]byte, 4096*4096*4)
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
}
src.ReplacePixels(pix)
dst.DrawImage(src, nil)
for i := 4095; i < 4096; i++ {
j := 4095
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{uint8(i + j), uint8((i + j) >> 8), uint8((i + j) >> 16), 0xff}
if got != want {
t.Errorf("At(%d, %d): got: %#v, want: %#v", i, j, got, want)
}
}
for j := 4095; j < 4096; j++ {
i := 4095
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{uint8(i + j), uint8((i + j) >> 8), uint8((i + j) >> 16), 0xff}
if got != want {
t.Errorf("At(%d, %d): got: %#v, want: %#v", i, j, got, want)
}
}
}
func TestImageCopy(t *testing.T) {
defer func() {
if r := recover(); r == nil {
t.Errorf("copying image and using it must panic")
}
}()
img0 := ebiten.NewImage(256, 256)
img1 := *img0
img1.Fill(color.Transparent)
}
// Issue #611, #907
func TestImageStretch(t *testing.T) {
if skipTooSlowTests(t) {
return
}
const w = 16
dst := ebiten.NewImage(w, maxImageSize)
loop:
for h := 1; h <= 32; h++ {
src := ebiten.NewImage(w+2, h+2)
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.ReplacePixels(pix)
_, dh := dst.Size()
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{0xff, 0, 0, 0xff}
}
if got != want {
t.Errorf("At(%d, %d) (height=%d, scale=%d/%d): got: %#v, want: %#v", 0, i+j, h, i, h, got, want)
continue loop
}
}
switch i % 32 {
case 31, 0:
i++
case 1:
i += 32 - 2
default:
panic("not reached")
}
}
}
}
func TestImageSprites(t *testing.T) {
const (
width = 512
height = 512
)
src := ebiten.NewImage(4, 4)
src.Fill(color.RGBA{0xff, 0xff, 0xff, 0xff})
dst := ebiten.NewImage(width, height)
for j := 0; j < height/4; j++ {
for i := 0; i < width/4; i++ {
op := &ebiten.DrawImageOptions{}
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++ {
got := dst.At(i*4, j*4).(color.RGBA)
want := color.RGBA{0xff, 0xff, 0xff, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %#v, want: %#v", i*4, j*4, got, want)
}
}
}
}
// 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.Size()
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.Size()
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) {
t.Errorf("At(%d, %d): got: %#v, want: %#v", i, j, got, want)
}
}
}
}
// 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.Size()
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.Size()
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) {
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")
}
}
// Issue #710
func TestImageMipmapColor(t *testing.T) {
img0 := ebiten.NewImage(256, 256)
img1 := ebiten.NewImage(128, 128)
img1.Fill(color.White)
for i := 0; i < 8; i++ {
img0.Clear()
s := 1 - float64(i)/8
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
op.GeoM.Scale(s, s)
op.ColorM.Scale(1, 1, 0, 1)
img0.DrawImage(img1, op)
op.GeoM.Translate(128, 0)
op.ColorM.Reset()
op.ColorM.Scale(0, 1, 1, 1)
img0.DrawImage(img1, op)
want := color.RGBA{0, 0xff, 0xff, 0xff}
got := img0.At(128, 0)
if got != want {
t.Errorf("want: %#v, got: %#v", want, got)
}
}
}
// 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{0xff, 0, 0, 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{0, 0xff, 0, 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.Size()
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{0xff, 0, 0, 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{0xff, 0, 0, 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{0xff, 0, 0, 0xff})
got, _ := img.SubImage(image.Rect(1, 1, 16, 16)).(*ebiten.Image).Size()
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{0xff, 0, 0, 0xff})
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := img0.At(i, j).(color.RGBA)
want := color.RGBA{0xff, 0, 0, 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{0xff, 0, 0, 0xff}
if got != want {
t.Errorf("img0.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
// 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)
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.ReplacePixels(pix)
for _, f := range []ebiten.Filter{ebiten.FilterNearest, ebiten.FilterLinear} {
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(scale, 1)
op.Filter = f
dst.DrawImage(src, op)
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{0xff, 0xff, 0xff, 0xff}
} else {
want = color.RGBA{0, 0, 0, 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): filter: %d, got: %v, want: %v", i, j, f, got, want)
}
}
}
}
}
// 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.ReplacePixels(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{0, 0, 0, 0xff}
} else {
want = color.RGBA{0xff, 0xff, 0xff, 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.ReplacePixels(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{byte(i%4) * 0x10, byte(j%4) * 0x10, 0, 0xff}
if !sameColors(got, want, 1) {
t.Errorf("dst.At(%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageReplacePixelsAfterClear(t *testing.T) {
const w, h = 256, 256
img := ebiten.NewImage(w, h)
img.ReplacePixels(make([]byte, 4*w*h))
// Clear used to call DrawImage to clear the image, which was the cause of crash. It is because after
// DrawImage is called, ReplacePixels for a region is forbidden.
//
// Now ReplacePixels was always called at Clear instead.
img.Clear()
img.ReplacePixels(make([]byte, 4*w*h))
// The test passes if this doesn't crash.
}
func TestImageSet(t *testing.T) {
type Pt struct {
X, Y int
}
const w, h = 16, 16
img := ebiten.NewImage(w, h)
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},
}
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)
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{}
op.GeoM.Translate(2, 2)
dst.DrawImage(src.SubImage(image.Rect(2, 2, w-2, h-2)).(*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 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)
}
}
}
}
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)
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.ReplacePixels(pix0)
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.ReplacePixels(pix1)
dst0.Fill(color.Black)
dst1.Fill(color.Black)
op := &ebiten.DrawImageOptions{}
op.GeoM.Scale(0.5, 0.5)
op.Filter = ebiten.FilterLinear
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.ReplacePixels(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{0xff, 0xff, 0xff, 0xff}
want64 := color.RGBA64{0xffff, 0xffff, 0xffff, 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 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{0xff, 0xff, 0xff, 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{0xff, 0xff, 0xff, 0xff}
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageZeroSizedMipmap(t *testing.T) {
const w, h = 16, 16
src := ebiten.NewImage(w, h)
dst := ebiten.NewImage(w, h)
op := &ebiten.DrawImageOptions{}
op.Filter = ebiten.FilterLinear
dst.DrawImage(src.SubImage(image.ZR).(*ebiten.Image), op)
}
// 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{0xff, 0xff, 0xff, 0xff}
if i == 0 || i == dstw-1 || j == 0 || j == dsth-1 {
want = color.RGBA{0, 0, 0, 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{0xff, 0, 0, 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 TestImageReplacePixelsOnSubImage(t *testing.T) {
dst := ebiten.NewImage(17, 31)
dst.Fill(color.RGBA{0xff, 0, 0, 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).ReplacePixels(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).ReplacePixels(pix1)
for j := 0; j < 31; j++ {
for i := 0; i < 17; i++ {
got := dst.At(i, j).(color.RGBA)
want := color.RGBA{0xff, 0, 0, 0xff}
p := image.Pt(i, j)
switch {
case p.In(r0):
want = color.RGBA{0, 0xff, 0, 0xff}
case p.In(r1):
want = color.RGBA{0, 0, 0xff, 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)
dst1 := 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)
vs1 := []ebiten.Vertex{
{
DstX: 0,
DstY: 0,
SrcX: 0,
SrcY: 0,
ColorR: 0.2,
ColorG: 0.4,
ColorB: 0.6,
ColorA: 0.8,
},
{
DstX: w,
DstY: 0,
SrcX: w,
SrcY: 0,
ColorR: 0.2,
ColorG: 0.4,
ColorB: 0.6,
ColorA: 0.8,
},
{
DstX: 0,
DstY: h,
SrcX: 0,
SrcY: h,
ColorR: 0.2,
ColorG: 0.4,
ColorB: 0.6,
ColorA: 0.8,
},
{
DstX: w,
DstY: h,
SrcX: w,
SrcY: h,
ColorR: 0.2,
ColorG: 0.4,
ColorB: 0.6,
ColorA: 0.8,
},
}
dst1.DrawTriangles(vs1, is, src, nil)
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)
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{0x00, 0x00, 0xff, 0xff})
op := &ebiten.DrawTrianglesOptions{}
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.
want := color.RGBA{0x00, 0x80, 0x80, 0xff}
// Interpolation isn't exactly specified, so a range is accepable.
diff := math.Max(math.Max(math.Max(
math.Abs(float64(got.R)-float64(want.R)),
math.Abs(float64(got.G)-float64(want.G))),
math.Abs(float64(got.B)-float64(want.B))),
math.Abs(float64(got.A)-float64(want.A)))
if diff > 5 {
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{0x00, 0x00, 0xff, 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(position vec4, texCoord 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{0x80, 0x80, 0x80, 0xff}
// Interpolation isn't exactly specified, so a range is accepable.
diff := math.Max(math.Max(math.Max(
math.Abs(float64(got.R)-float64(want.R)),
math.Abs(float64(got.G)-float64(want.G))),
math.Abs(float64(got.B)-float64(want.B))),
math.Abs(float64(got.A)-float64(want.A)))
if diff > 5 {
t.Errorf("At(1, 0): got: %v, want: %v", got, want)
}
}
// Issue #1137
func TestImageDrawOver(t *testing.T) {
dst := ebiten.NewImage(320, 240)
src := image.NewUniform(color.RGBA{0xff, 0, 0, 0xff})
// This must not cause infinite-loop.
draw.Draw(dst, dst.Bounds(), src, image.ZP, draw.Over)
for j := 0; j < 240; j++ {
for i := 0; i < 320; i++ {
got := dst.At(i, j)
want := color.RGBA{0xff, 0, 0, 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 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)
}
// #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{0xff, 0, 0, 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{x, 0, 0, 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.ReplacePixels(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.ReplacePixels(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.CompositeMode = ebiten.CompositeModeCopy
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{byte(k), byte(k), byte(k), 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 TestImageReplacePixelsAndModifyPixels(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.ReplacePixels(pix)
// Modify pix after ReplacePixels
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{0xff, 0, 0, 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{0x10, 0x20, 0x30, 0x40})
src.Fill(color.RGBA{0x50, 0x60, 0x70, 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
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{0xff, 0, 0, 0xff})
src.Fill(color.RGBA{0, 0xff, 0, 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{0xff, 0, 0, 0xff}
if 4 <= i && i < 12 && 5 <= j && j < 14 {
want = color.RGBA{0, 0xff, 0, 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{0xff, 0xff, 0xff, 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{0xff, 0xff, 0xff, 0xff}
}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestImageEvenOdd(t *testing.T) {
emptyImage := ebiten.NewImage(3, 3)
emptyImage.Fill(color.White)
emptySubImage := emptyImage.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.EvenOdd,
}
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{0, 0, 0xff, 0xff}
case 2 <= i && i < 14 && 2 <= j && j < 14:
want = color.RGBA{0, 0, 0, 0}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{0xff, 0, 0, 0xff}
default:
want = color.RGBA{0, 0, 0, 0}
}
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{0, 0, 0xff, 0xff}
case 3 <= i && i < 15 && 3 <= j && j < 15:
want = color.RGBA{0, 0, 0, 0}
case 2 <= i && i < 16 && 2 <= j && j < 16:
want = color.RGBA{0xff, 0, 0, 0xff}
default:
want = color.RGBA{0, 0, 0, 0}
}
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{0, 0, 0xff, 0xff}
case 2 <= i && i < 14 && 2 <= j && j < 14:
want = color.RGBA{0, 0xff, 0, 0xff}
case 1 <= i && i < 15 && 1 <= j && j < 15:
want = color.RGBA{0xff, 0, 0, 0xff}
default:
want = color.RGBA{0, 0, 0, 0}
}
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 TestIndicesOverflow(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, graphics.IndicesNum/3*3)
dst.DrawTriangles(vs, is, src, op)
// Cause an overflow for indices.
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{0xff, 0xff, 0xff, 0xff}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestVerticesOverflow(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, graphics.IndicesNum-1)
is := make([]uint16, 3)
dst.DrawTriangles(vs, is, src, op)
// Cause an overflow for vertices.
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{0xff, 0xff, 0xff, 0xff}
if got != want {
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestTooManyVertices(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, graphics.IndicesNum+1)
is := make([]uint16, 3)
dst.DrawTriangles(vs, is, src, op)
// Force to cause flushing the graphics commands.
// Confirm this doesn't freeze.
dst.At(0, 0)
}