ebiten/internal/restorable/shader_test.go

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// Copyright 2018 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/color"
"testing"
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"github.com/hajimehoshi/ebiten/v2/internal/driver"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
. "github.com/hajimehoshi/ebiten/v2/internal/restorable"
etesting "github.com/hajimehoshi/ebiten/v2/internal/testing"
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)
var emptyImage = NewImage(3, 3)
func clearImage(img *Image, w, h int) {
dx0 := float32(0)
dy0 := float32(0)
dx1 := float32(w)
dy1 := float32(h)
sx0 := float32(1)
sy0 := float32(1)
sx1 := float32(2)
sy1 := float32(2)
vs := []float32{
dx0, dy0, sx0, sy0, 0, 0, 0, 0,
dx1, dy0, sx1, sy0, 0, 0, 0, 0,
dx0, dy1, sx0, sy1, 0, 0, 0, 0,
dx1, dy1, sx1, sy1, 0, 0, 0, 0,
}
is := graphics.QuadIndices()
dr := driver.Region{
X: 0,
Y: 0,
Width: float32(w),
Height: float32(h),
}
img.DrawTriangles([graphics.ShaderImageNum]*Image{emptyImage}, [graphics.ShaderImageNum - 1][2]float32{}, vs, is, nil, driver.CompositeModeClear, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, nil, nil, false)
}
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func TestShader(t *testing.T) {
img := NewImage(1, 1)
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defer img.Dispose()
ir := etesting.ShaderProgramFill(0xff, 0, 0, 0xff)
s := NewShader(&ir)
dr := driver.Region{
X: 0,
Y: 0,
Width: 1,
Height: 1,
}
img.DrawTriangles([graphics.ShaderImageNum]*Image{}, [graphics.ShaderImageNum - 1][2]float32{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, s, nil, false)
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if err := ResolveStaleImages(); err != nil {
t.Fatal(err)
}
if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
want := color.RGBA{0xff, 0, 0, 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderChain(t *testing.T) {
const num = 10
imgs := []*Image{}
for i := 0; i < num; i++ {
img := NewImage(1, 1)
defer img.Dispose()
imgs = append(imgs, img)
}
imgs[0].ReplacePixels([]byte{0xff, 0, 0, 0xff}, 0, 0, 1, 1)
ir := etesting.ShaderProgramImages(1)
s := NewShader(&ir)
for i := 0; i < num-1; i++ {
dr := driver.Region{
X: 0,
Y: 0,
Width: 1,
Height: 1,
}
imgs[i+1].DrawTriangles([graphics.ShaderImageNum]*Image{imgs[i]}, [graphics.ShaderImageNum - 1][2]float32{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, s, nil, false)
}
if err := ResolveStaleImages(); err != nil {
t.Fatal(err)
}
if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
for i, img := range imgs {
want := color.RGBA{0xff, 0, 0, 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0)
if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
func TestShaderMultipleSources(t *testing.T) {
var srcs [graphics.ShaderImageNum]*Image
for i := range srcs {
srcs[i] = NewImage(1, 1)
}
srcs[0].ReplacePixels([]byte{0x40, 0, 0, 0xff}, 0, 0, 1, 1)
srcs[1].ReplacePixels([]byte{0, 0x80, 0, 0xff}, 0, 0, 1, 1)
srcs[2].ReplacePixels([]byte{0, 0, 0xc0, 0xff}, 0, 0, 1, 1)
dst := NewImage(1, 1)
ir := etesting.ShaderProgramImages(3)
s := NewShader(&ir)
var offsets [graphics.ShaderImageNum - 1][2]float32
dr := driver.Region{
X: 0,
Y: 0,
Width: 1,
Height: 1,
}
dst.DrawTriangles(srcs, offsets, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, s, nil, false)
// Clear one of the sources after DrawTriangles. dst should not be affected.
clearImage(srcs[0], 1, 1)
if err := ResolveStaleImages(); err != nil {
t.Fatal(err)
}
if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
want := color.RGBA{0x40, 0x80, 0xc0, 0xff}
got := pixelsToColor(dst.BasePixelsForTesting(), 0, 0)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderMultipleSourcesOnOneTexture(t *testing.T) {
src := NewImage(3, 1)
src.ReplacePixels([]byte{
0x40, 0, 0, 0xff,
0, 0x80, 0, 0xff,
0, 0, 0xc0, 0xff,
}, 0, 0, 3, 1)
srcs := [graphics.ShaderImageNum]*Image{src, src, src}
dst := NewImage(1, 1)
ir := etesting.ShaderProgramImages(3)
s := NewShader(&ir)
offsets := [graphics.ShaderImageNum - 1][2]float32{
{1, 0},
{2, 0},
}
dr := driver.Region{
X: 0,
Y: 0,
Width: 1,
Height: 1,
}
dst.DrawTriangles(srcs, offsets, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, s, nil, false)
// Clear one of the sources after DrawTriangles. dst should not be affected.
clearImage(srcs[0], 3, 1)
if err := ResolveStaleImages(); err != nil {
t.Fatal(err)
}
if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
want := color.RGBA{0x40, 0x80, 0xc0, 0xff}
got := pixelsToColor(dst.BasePixelsForTesting(), 0, 0)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderDispose(t *testing.T) {
img := NewImage(1, 1)
defer img.Dispose()
ir := etesting.ShaderProgramFill(0xff, 0, 0, 0xff)
s := NewShader(&ir)
dr := driver.Region{
X: 0,
Y: 0,
Width: 1,
Height: 1,
}
img.DrawTriangles([graphics.ShaderImageNum]*Image{}, [graphics.ShaderImageNum - 1][2]float32{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), nil, driver.CompositeModeCopy, driver.FilterNearest, driver.AddressUnsafe, dr, driver.Region{}, s, nil, false)
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// Dispose the shader. This should invalidates all the images using this shader i.e., all the images become
// stale.
s.Dispose()
if err := ResolveStaleImages(); err != nil {
t.Fatal(err)
}
if err := RestoreIfNeeded(); err != nil {
t.Fatal(err)
}
want := color.RGBA{0xff, 0, 0, 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}