ebiten/internal/restorable/images_test.go

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// Copyright 2017 The Ebiten Authors
//
// 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 restorable_test
import (
"image"
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"image/color"
"testing"
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"github.com/hajimehoshi/ebiten/v2/internal/graphics"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
"github.com/hajimehoshi/ebiten/v2/internal/restorable"
etesting "github.com/hajimehoshi/ebiten/v2/internal/testing"
"github.com/hajimehoshi/ebiten/v2/internal/ui"
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)
func TestMain(m *testing.M) {
restorable.EnableRestoringForTesting()
etesting.MainWithRunLoop(m)
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}
func pixelsToColor(p *restorable.Pixels, i, j, imageWidth, imageHeight int) color.RGBA {
var pix [4]byte
p.ReadPixels(pix[:], image.Rect(i, j, i+1, j+1), imageWidth, imageHeight)
return color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}
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}
func bytesToManagedBytes(src []byte) *graphics.ManagedBytes {
if len(src) == 0 {
panic("restorable: len(src) must be > 0")
}
return graphics.NewManagedBytes(len(src), func(dst []byte) {
copy(dst, src)
})
}
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
}
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func TestRestore(t *testing.T) {
img0 := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
defer img0.Dispose()
clr0 := color.RGBA{A: 0xff}
img0.WritePixels(bytesToManagedBytes([]byte{clr0.R, clr0.G, clr0.B, clr0.A}), image.Rect(0, 0, 1, 1))
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
want := clr0
got := pixelsToColor(img0.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
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t.Errorf("got %v, want %v", got, want)
}
}
func TestRestoreWithoutDraw(t *testing.T) {
img0 := restorable.NewImage(1024, 1024, restorable.ImageTypeRegular)
defer img0.Dispose()
// If there is no drawing command on img0, img0 is cleared when restored.
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
for j := 0; j < 1024; j++ {
for i := 0; i < 1024; i++ {
want := color.RGBA{}
got := pixelsToColor(img0.BasePixelsForTesting(), i, j, 1024, 1024)
if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
}
}
func quadVertices(sw, sh, x, y int) []float32 {
dx0 := float32(x)
dy0 := float32(y)
dx1 := float32(x + sw)
dy1 := float32(y + sh)
sx0 := float32(0)
sy0 := float32(0)
sx1 := float32(sw)
sy1 := float32(sh)
return []float32{
dx0, dy0, sx0, sy0, 1, 1, 1, 1,
dx1, dy0, sx1, sy0, 1, 1, 1, 1,
dx0, dy1, sx0, sy1, 1, 1, 1, 1,
dx1, dy1, sx1, sy1, 1, 1, 1, 1,
}
}
func TestRestoreChain(t *testing.T) {
const num = 10
imgs := []*restorable.Image{}
for i := 0; i < num; i++ {
img := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
imgs = append(imgs, img)
}
defer func() {
for _, img := range imgs {
img.Dispose()
}
}()
clr := color.RGBA{A: 0xff}
imgs[0].WritePixels(bytesToManagedBytes([]byte{clr.R, clr.G, clr.B, clr.A}), image.Rect(0, 0, 1, 1))
for i := 0; i < num-1; i++ {
vs := quadVertices(1, 1, 0, 0)
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, 1, 1)
imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
}
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
want := clr
for i, img := range imgs {
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
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func TestRestoreChain2(t *testing.T) {
const (
num = 10
w = 1
h = 1
)
imgs := []*restorable.Image{}
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for i := 0; i < num; i++ {
img := restorable.NewImage(w, h, restorable.ImageTypeRegular)
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imgs = append(imgs, img)
}
defer func() {
for _, img := range imgs {
img.Dispose()
}
}()
clr0 := color.RGBA{R: 0xff, A: 0xff}
imgs[0].WritePixels(bytesToManagedBytes([]byte{clr0.R, clr0.G, clr0.B, clr0.A}), image.Rect(0, 0, w, h))
clr7 := color.RGBA{G: 0xff, A: 0xff}
imgs[7].WritePixels(bytesToManagedBytes([]byte{clr7.R, clr7.G, clr7.B, clr7.A}), image.Rect(0, 0, w, h))
clr8 := color.RGBA{B: 0xff, A: 0xff}
imgs[8].WritePixels(bytesToManagedBytes([]byte{clr8.R, clr8.G, clr8.B, clr8.A}), image.Rect(0, 0, w, h))
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
imgs[8].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[7]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
imgs[9].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[8]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
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for i := 0; i < 7; i++ {
imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
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}
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
for i, img := range imgs {
want := clr0
if i == 8 || i == 9 {
want = clr7
}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0, w, h)
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if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
func TestRestoreOverrideSource(t *testing.T) {
const (
w = 1
h = 1
)
img0 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img1 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img2 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img3 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
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defer func() {
img3.Dispose()
img2.Dispose()
img1.Dispose()
img0.Dispose()
}()
clr0 := color.RGBA{A: 0xff}
clr1 := color.RGBA{B: 0x01, A: 0xff}
img1.WritePixels(bytesToManagedBytes([]byte{clr0.R, clr0.G, clr0.B, clr0.A}), image.Rect(0, 0, w, h))
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
img2.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img0.WritePixels(bytesToManagedBytes([]byte{clr1.R, clr1.G, clr1.B, clr1.A}), image.Rect(0, 0, w, h))
img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 0, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
testCases := []struct {
name string
want color.RGBA
got color.RGBA
}{
{
"0",
clr1,
pixelsToColor(img0.BasePixelsForTesting(), 0, 0, w, h),
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},
{
"1",
clr1,
pixelsToColor(img1.BasePixelsForTesting(), 0, 0, w, h),
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},
{
"2",
clr0,
pixelsToColor(img2.BasePixelsForTesting(), 0, 0, w, h),
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},
{
"3",
clr0,
pixelsToColor(img3.BasePixelsForTesting(), 0, 0, w, h),
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},
}
for _, c := range testCases {
if !sameColors(c.got, c.want, 1) {
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t.Errorf("%s: got %v, want %v", c.name, c.got, c.want)
}
}
}
func TestRestoreComplexGraph(t *testing.T) {
const (
w = 4
h = 1
)
// 0 -> 3
// 1 -> 3
// 1 -> 4
// 2 -> 4
// 2 -> 7
// 3 -> 5
// 3 -> 6
// 3 -> 7
// 4 -> 6
base := image.NewRGBA(image.Rect(0, 0, w, h))
base.Pix[0] = 0xff
base.Pix[1] = 0xff
base.Pix[2] = 0xff
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
img1 := newImageFromImage(base)
img2 := newImageFromImage(base)
img3 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img4 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img5 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img6 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img7 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
defer func() {
img7.Dispose()
img6.Dispose()
img5.Dispose()
img4.Dispose()
img3.Dispose()
img2.Dispose()
img1.Dispose()
img0.Dispose()
}()
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
vs := quadVertices(w, h, 0, 0)
img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 1, 0)
img3.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 1, 0)
img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 2, 0)
img4.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 0, 0)
img5.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 0, 0)
img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 1, 0)
img6.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img4}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 0, 0)
img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
vs = quadVertices(w, h, 2, 0)
img7.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img3}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
testCases := []struct {
name string
out string
image *restorable.Image
}{
{
"0",
"*---",
img0,
},
{
"1",
"*---",
img1,
},
{
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"2",
"*---",
img2,
},
{
"3",
"**--",
img3,
},
{
"4",
"-**-",
img4,
},
{
"5",
"**--",
img5,
},
{
"6",
"****",
img6,
},
{
"7",
"*-**",
img7,
},
}
for _, c := range testCases {
for i := 0; i < 4; i++ {
want := color.RGBA{}
if c.out[i] == '*' {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
got := pixelsToColor(c.image.BasePixelsForTesting(), i, 0, w, h)
if !sameColors(got, want, 1) {
t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
}
}
}
}
func newImageFromImage(rgba *image.RGBA) *restorable.Image {
s := rgba.Bounds().Size()
img := restorable.NewImage(s.X, s.Y, restorable.ImageTypeRegular)
img.WritePixels(bytesToManagedBytes(rgba.Pix), image.Rect(0, 0, s.X, s.Y))
return img
}
func TestRestoreRecursive(t *testing.T) {
const (
w = 4
h = 1
)
base := image.NewRGBA(image.Rect(0, 0, w, h))
base.Pix[0] = 0xff
base.Pix[1] = 0xff
base.Pix[2] = 0xff
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
img1 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
defer func() {
img1.Dispose()
img0.Dispose()
}()
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(w, h, 1, 0), is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
testCases := []struct {
name string
out string
image *restorable.Image
}{
{
"0",
"*-*-",
img0,
},
{
"1",
"-*--",
img1,
},
}
for _, c := range testCases {
for i := 0; i < 4; i++ {
want := color.RGBA{}
if c.out[i] == '*' {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
got := pixelsToColor(c.image.BasePixelsForTesting(), i, 0, w, h)
if !sameColors(got, want, 1) {
t.Errorf("%s[%d]: got %v, want %v", c.name, i, got, want)
}
}
}
}
func TestWritePixels(t *testing.T) {
img := restorable.NewImage(17, 31, restorable.ImageTypeRegular)
defer img.Dispose()
pix := make([]byte, 4*4*4)
for i := range pix {
pix[i] = 0xff
}
img.WritePixels(bytesToManagedBytes(pix), image.Rect(5, 7, 9, 11))
// Check the region (5, 7)-(9, 11). Outside state is indeterminate.
pix = make([]byte, 4*4*4)
for i := range pix {
pix[i] = 0
}
if err := img.ReadPixels(ui.GraphicsDriverForTesting(), pix, image.Rect(5, 7, 9, 11)); err != nil {
t.Fatal(err)
}
for j := 7; j < 11; j++ {
for i := 5; i < 9; i++ {
idx := 4 * ((j-7)*4 + i - 5)
got := color.RGBA{R: pix[idx], G: pix[idx+1], B: pix[idx+2], A: pix[idx+3]}
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := img.ReadPixels(ui.GraphicsDriverForTesting(), pix, image.Rect(5, 7, 9, 11)); err != nil {
t.Fatal(err)
}
for j := 7; j < 11; j++ {
for i := 5; i < 9; i++ {
idx := 4 * ((j-7)*4 + i - 5)
got := color.RGBA{R: pix[idx], G: pix[idx+1], B: pix[idx+2], A: pix[idx+3]}
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if got != want {
t.Errorf("(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestDrawTrianglesAndWritePixels(t *testing.T) {
base := image.NewRGBA(image.Rect(0, 0, 1, 1))
base.Pix[0] = 0xff
base.Pix[1] = 0
base.Pix[2] = 0
base.Pix[3] = 0xff
img0 := newImageFromImage(base)
defer img0.Dispose()
img1 := restorable.NewImage(2, 1, restorable.ImageTypeRegular)
defer img1.Dispose()
vs := quadVertices(1, 1, 0, 0)
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, 2, 1)
img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img1.WritePixels(bytesToManagedBytes([]byte{0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}), image.Rect(0, 0, 2, 1))
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
var pix [4]byte
if err := img1.ReadPixels(ui.GraphicsDriverForTesting(), pix[:], image.Rect(0, 0, 1, 1)); err != nil {
t.Fatal(err)
}
got := color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
if !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}
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func TestDispose(t *testing.T) {
base0 := image.NewRGBA(image.Rect(0, 0, 1, 1))
img0 := newImageFromImage(base0)
defer img0.Dispose()
base1 := image.NewRGBA(image.Rect(0, 0, 1, 1))
img1 := newImageFromImage(base1)
base2 := image.NewRGBA(image.Rect(0, 0, 1, 1))
base2.Pix[0] = 0xff
base2.Pix[1] = 0xff
base2.Pix[2] = 0xff
base2.Pix[3] = 0xff
img2 := newImageFromImage(base2)
defer img2.Dispose()
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, 1, 1)
img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img2}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img0.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img1}, quadVertices(1, 1, 0, 0), is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
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img1.Dispose()
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
var pix [4]byte
if err := img0.ReadPixels(ui.GraphicsDriverForTesting(), pix[:], image.Rect(0, 0, 1, 1)); err != nil {
t.Fatal(err)
}
got := color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}
want := color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
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if !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestWritePixelsPart(t *testing.T) {
pix := make([]uint8, 4*2*2)
for i := range pix {
pix[i] = 0xff
}
img := restorable.NewImage(4, 4, restorable.ImageTypeRegular)
// This doesn't make the image stale. Its base pixels are available.
img.WritePixels(bytesToManagedBytes(pix), image.Rect(1, 1, 3, 3))
cases := []struct {
i int
j int
want color.RGBA
}{
{
i: 0,
j: 0,
want: color.RGBA{},
},
{
i: 3,
j: 0,
want: color.RGBA{},
},
{
i: 0,
j: 1,
want: color.RGBA{},
},
{
i: 1,
j: 1,
want: color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
},
{
i: 3,
j: 1,
want: color.RGBA{},
},
{
i: 0,
j: 2,
want: color.RGBA{},
},
{
i: 2,
j: 2,
want: color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff},
},
{
i: 3,
j: 2,
want: color.RGBA{},
},
{
i: 0,
j: 3,
want: color.RGBA{},
},
{
i: 3,
j: 3,
want: color.RGBA{},
},
}
for _, c := range cases {
got := pixelsToColor(img.BasePixelsForTesting(), c.i, c.j, 4, 4)
want := c.want
if got != want {
t.Errorf("base pixel (%d, %d): got %v, want %v", c.i, c.j, got, want)
}
}
}
func TestWritePixelsOnly(t *testing.T) {
const w, h = 128, 128
img0 := restorable.NewImage(w, h, restorable.ImageTypeRegular)
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defer img0.Dispose()
img1 := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
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defer img1.Dispose()
for i := 0; i < w*h; i += 5 {
img0.WritePixels(bytesToManagedBytes([]byte{1, 2, 3, 4}), image.Rect(i%w, i/w, i%w+1, i/w+1))
}
vs := quadVertices(1, 1, 0, 0)
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is := graphics.QuadIndices()
dr := image.Rect(0, 0, 1, 1)
img1.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{img0}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
img0.WritePixels(bytesToManagedBytes([]byte{5, 6, 7, 8}), image.Rect(0, 0, 1, 1))
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// BasePixelsForTesting is available without GPU accessing.
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := j*w + i
var want color.RGBA
switch {
case idx == 0:
want = color.RGBA{R: 5, G: 6, B: 7, A: 8}
case idx%5 == 0:
want = color.RGBA{R: 1, G: 2, B: 3, A: 4}
}
got := pixelsToColor(img0.BasePixelsForTesting(), i, j, w, h)
if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
}
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if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
want := color.RGBA{R: 1, G: 2, B: 3, A: 4}
got := pixelsToColor(img1.BasePixelsForTesting(), 0, 0, w, h)
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if !sameColors(got, want, 0) {
t.Errorf("got %v, want %v", got, want)
}
}
// TODO: How about volatile/screen images?
// Issue #793
func TestReadPixelsFromVolatileImage(t *testing.T) {
const w, h = 16, 16
dst := restorable.NewImage(w, h, restorable.ImageTypeVolatile)
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
// First, make sure that dst has pixels
dst.WritePixels(bytesToManagedBytes(make([]byte, 4*w*h)), image.Rect(0, 0, w, h))
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// Second, draw src to dst. If the implementation is correct, dst becomes stale.
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pix := make([]byte, 4*w*h)
for i := range pix {
pix[i] = 0xff
}
src.WritePixels(bytesToManagedBytes(pix), image.Rect(0, 0, w, h))
vs := quadVertices(1, 1, 0, 0)
is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
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// Read the pixels. If the implementation is correct, dst tries to read its pixels from GPU due to being
// stale.
want := byte(0xff)
var result [4]byte
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result[:], image.Rect(0, 0, 1, 1)); err != nil {
t.Fatal(err)
}
got := result[0]
if got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestAllowWritePixelsAfterDrawTriangles(t *testing.T) {
const w, h = 16, 16
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
dst := restorable.NewImage(w, h, restorable.ImageTypeRegular)
vs := quadVertices(w, h, 0, 0)
is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
dst.WritePixels(bytesToManagedBytes(make([]byte, 4*w*h)), image.Rect(0, 0, w, h))
// WritePixels for a whole image doesn't panic.
}
func TestAllowWritePixelsForPartAfterDrawTriangles(t *testing.T) {
const w, h = 16, 16
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
dst := restorable.NewImage(w, h, restorable.ImageTypeRegular)
pix := make([]byte, 4*w*h)
for i := range pix {
pix[i] = 0xff
}
src.WritePixels(bytesToManagedBytes(pix), image.Rect(0, 0, w, h))
vs := quadVertices(w, h, 0, 0)
is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
dst.WritePixels(bytesToManagedBytes(make([]byte, 4*2*2)), image.Rect(0, 0, 2, 2))
// WritePixels for a part of image doesn't panic.
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
result := make([]byte, 4*w*h)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, w, h)); err != nil {
t.Fatal(err)
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
got := color.RGBA{R: result[4*(j*w+i)], G: result[4*(j*w+i)+1], B: result[4*(j*w+i)+2], A: result[4*(j*w+i)+3]}
var want color.RGBA
if i >= 2 || j >= 2 {
want = color.RGBA{R: 0xff, G: 0xff, B: 0xff, A: 0xff}
}
if got != want {
t.Errorf("color at (%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestExtend(t *testing.T) {
pixAt := func(i, j int) byte {
return byte(17*i + 13*j + 0x40)
}
const w, h = 16, 16
orig := restorable.NewImage(w, h, restorable.ImageTypeRegular)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := j*w + i
v := pixAt(i, j)
pix[4*idx] = v
pix[4*idx+1] = v
pix[4*idx+2] = v
pix[4*idx+3] = v
}
}
orig.WritePixels(bytesToManagedBytes(pix), image.Rect(0, 0, w, h))
extended := orig.Extend(w*2, h*2) // After this, orig is already disposed.
result := make([]byte, 4*(w*2)*(h*2))
if err := extended.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, w*2, h*2)); err != nil {
t.Fatal(err)
}
for j := 0; j < h*2; j++ {
for i := 0; i < w*2; i++ {
got := result[4*(j*(w*2)+i)]
want := byte(0)
if i < w && j < h {
want = pixAt(i, j)
}
if got != want {
t.Errorf("extended.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestDrawTrianglesAndExtend(t *testing.T) {
pixAt := func(i, j int) byte {
return byte(17*i + 13*j + 0x40)
}
const w, h = 16, 16
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
pix := make([]byte, 4*w*h)
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := j*w + i
v := pixAt(i, j)
pix[4*idx] = v
pix[4*idx+1] = v
pix[4*idx+2] = v
pix[4*idx+3] = v
}
}
src.WritePixels(bytesToManagedBytes(pix), image.Rect(0, 0, w, h))
orig := restorable.NewImage(w, h, restorable.ImageTypeRegular)
vs := quadVertices(w, h, 0, 0)
is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
orig.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
extended := orig.Extend(w*2, h*2) // After this, orig is already disposed.
result := make([]byte, 4*(w*2)*(h*2))
if err := extended.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, w*2, h*2)); err != nil {
t.Fatal(err)
}
for j := 0; j < h*2; j++ {
for i := 0; i < w*2; i++ {
got := result[4*(j*(w*2)+i)]
want := byte(0)
if i < w && j < h {
want = pixAt(i, j)
}
if got != want {
t.Errorf("extended.At(%d, %d): got: %v, want: %v", i, j, got, want)
}
}
}
}
func TestClearPixels(t *testing.T) {
const w, h = 16, 16
img := restorable.NewImage(w, h, restorable.ImageTypeRegular)
img.WritePixels(bytesToManagedBytes(make([]byte, 4*4*4)), image.Rect(0, 0, 4, 4))
img.WritePixels(bytesToManagedBytes(make([]byte, 4*4*4)), image.Rect(4, 0, 8, 4))
img.ClearPixels(image.Rect(0, 0, 4, 4))
img.ClearPixels(image.Rect(4, 0, 8, 4))
// After clearing, the regions will be available again.
img.WritePixels(bytesToManagedBytes(make([]byte, 4*8*4)), image.Rect(0, 0, 8, 4))
}
func TestMutateSlices(t *testing.T) {
const w, h = 16, 16
dst := restorable.NewImage(w, h, restorable.ImageTypeRegular)
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
pix := make([]byte, 4*w*h)
for i := 0; i < w*h; i++ {
pix[4*i] = byte(i)
pix[4*i+1] = byte(i)
pix[4*i+2] = byte(i)
pix[4*i+3] = 0xff
}
src.WritePixels(bytesToManagedBytes(pix), image.Rect(0, 0, w, h))
vs := quadVertices(w, h, 0, 0)
is := make([]uint16, len(graphics.QuadIndices()))
copy(is, graphics.QuadIndices())
dr := image.Rect(0, 0, w, h)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
for i := range vs {
vs[i] = 0
}
for i := range is {
is[i] = 0
}
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
srcPix := make([]byte, 4*w*h)
if err := src.ReadPixels(ui.GraphicsDriverForTesting(), srcPix, image.Rect(0, 0, w, h)); err != nil {
t.Fatal(err)
}
dstPix := make([]byte, 4*w*h)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), dstPix, image.Rect(0, 0, w, h)); err != nil {
t.Fatal(err)
}
for j := 0; j < h; j++ {
for i := 0; i < w; i++ {
idx := 4 * (j*w + i)
want := color.RGBA{R: srcPix[idx], G: srcPix[idx+1], B: srcPix[idx+2], A: srcPix[idx+3]}
got := color.RGBA{R: dstPix[idx], G: dstPix[idx+1], B: dstPix[idx+2], A: dstPix[idx+3]}
if !sameColors(got, want, 1) {
t.Errorf("(%d, %d): got %v, want %v", i, j, got, want)
}
}
}
}
func TestOverlappedPixels(t *testing.T) {
dst := restorable.NewImage(3, 3, restorable.ImageTypeRegular)
pix0 := make([]byte, 4*2*2)
for j := 0; j < 2; j++ {
for i := 0; i < 2; i++ {
idx := 4 * (j*2 + i)
pix0[idx] = 0xff
pix0[idx+1] = 0
pix0[idx+2] = 0
pix0[idx+3] = 0xff
}
}
dst.WritePixels(bytesToManagedBytes(pix0), image.Rect(0, 0, 2, 2))
pix1 := make([]byte, 4*2*2)
for j := 0; j < 2; j++ {
for i := 0; i < 2; i++ {
idx := 4 * (j*2 + i)
pix1[idx] = 0
pix1[idx+1] = 0xff
pix1[idx+2] = 0
pix1[idx+3] = 0xff
}
}
dst.WritePixels(bytesToManagedBytes(pix1), image.Rect(1, 1, 3, 3))
wantColors := []color.RGBA{
{0xff, 0, 0, 0xff},
{0xff, 0, 0, 0xff},
{0, 0, 0, 0},
{0xff, 0, 0, 0xff},
{0, 0xff, 0, 0xff},
{0, 0xff, 0, 0xff},
{0, 0, 0, 0},
{0, 0xff, 0, 0xff},
{0, 0xff, 0, 0xff},
}
result := make([]byte, 4*3*3)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, 3, 3)); err != nil {
t.Fatal(err)
}
for j := 0; j < 3; j++ {
for i := 0; i < 3; i++ {
idx := 4 * (j*3 + i)
got := color.RGBA{R: result[idx], G: result[idx+1], B: result[idx+2], A: result[idx+3]}
want := wantColors[3*j+i]
if got != want {
t.Errorf("color at (%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
dst.WritePixels(nil, image.Rect(1, 0, 3, 2))
wantColors = []color.RGBA{
{0xff, 0, 0, 0xff},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0xff, 0, 0, 0xff},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0, 0xff, 0, 0xff},
{0, 0xff, 0, 0xff},
}
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, 3, 3)); err != nil {
t.Fatal(err)
}
for j := 0; j < 3; j++ {
for i := 0; i < 3; i++ {
idx := 4 * (j*3 + i)
got := color.RGBA{R: result[idx], G: result[idx+1], B: result[idx+2], A: result[idx+3]}
want := wantColors[3*j+i]
if got != want {
t.Errorf("color at (%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
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pix2 := make([]byte, 4*2*2)
for j := 0; j < 2; j++ {
for i := 0; i < 2; i++ {
idx := 4 * (j*2 + i)
pix2[idx] = 0
pix2[idx+1] = 0
pix2[idx+2] = 0xff
pix2[idx+3] = 0xff
}
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}
dst.WritePixels(bytesToManagedBytes(pix2), image.Rect(1, 1, 3, 3))
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wantColors = []color.RGBA{
{0xff, 0, 0, 0xff},
{0, 0, 0, 0},
{0, 0, 0, 0},
{0xff, 0, 0, 0xff},
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{0, 0, 0xff, 0xff},
{0, 0, 0xff, 0xff},
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{0, 0, 0, 0},
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{0, 0, 0xff, 0xff},
{0, 0, 0xff, 0xff},
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}
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, 3, 3)); err != nil {
t.Fatal(err)
}
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for j := 0; j < 3; j++ {
for i := 0; i < 3; i++ {
idx := 4 * (j*3 + i)
got := color.RGBA{R: result[idx], G: result[idx+1], B: result[idx+2], A: result[idx+3]}
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want := wantColors[3*j+i]
if got != want {
t.Errorf("color at (%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
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if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
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t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), result, image.Rect(0, 0, 3, 3)); err != nil {
t.Fatal(err)
}
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for j := 0; j < 3; j++ {
for i := 0; i < 3; i++ {
idx := 4 * (j*3 + i)
got := color.RGBA{R: result[idx], G: result[idx+1], B: result[idx+2], A: result[idx+3]}
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want := wantColors[3*j+i]
if got != want {
t.Errorf("color at (%d, %d): got %v, want: %v", i, j, got, want)
}
}
}
}
// Issue #2324
func TestDrawTrianglesAndReadPixels(t *testing.T) {
const w, h = 1, 1
src := restorable.NewImage(w, h, restorable.ImageTypeRegular)
dst := restorable.NewImage(w, h, restorable.ImageTypeRegular)
src.WritePixels(bytesToManagedBytes([]byte{0x80, 0x80, 0x80, 0x80}), image.Rect(0, 0, 1, 1))
vs := quadVertices(w, h, 0, 0)
is := graphics.QuadIndices()
dr := image.Rect(0, 0, w, h)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
pix := make([]byte, 4*w*h)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), pix, image.Rect(0, 0, w, h)); err != nil {
t.Fatal(err)
}
if got, want := (color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}), (color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestWritePixelsAndDrawTriangles(t *testing.T) {
src := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
dst := restorable.NewImage(2, 1, restorable.ImageTypeRegular)
src.WritePixels(bytesToManagedBytes([]byte{0x80, 0x80, 0x80, 0x80}), image.Rect(0, 0, 1, 1))
// Call WritePixels first.
dst.WritePixels(bytesToManagedBytes([]byte{0x40, 0x40, 0x40, 0x40}), image.Rect(0, 0, 1, 1))
// Call DrawTriangles at a different region second.
vs := quadVertices(1, 1, 1, 0)
is := graphics.QuadIndices()
dr := image.Rect(1, 0, 2, 1)
dst.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{src}, vs, is, graphicsdriver.BlendSourceOver, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
// Get the pixels.
pix := make([]byte, 4*2*1)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), pix, image.Rect(0, 0, 2, 1)); err != nil {
t.Fatal(err)
}
if got, want := (color.RGBA{R: pix[0], G: pix[1], B: pix[2], A: pix[3]}), (color.RGBA{R: 0x40, G: 0x40, B: 0x40, A: 0x40}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
if got, want := (color.RGBA{R: pix[4], G: pix[5], B: pix[6], A: pix[7]}), (color.RGBA{R: 0x80, G: 0x80, B: 0x80, A: 0x80}); !sameColors(got, want, 1) {
t.Errorf("got: %v, want: %v", got, want)
}
}