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"
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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"
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etesting "github.com/hajimehoshi/ebiten/v2/internal/testing"
"github.com/hajimehoshi/ebiten/v2/internal/ui"
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)
func clearImage(img *restorable.Image, w, h int) {
emptyImage := restorable.NewImage(3, 3, restorable.ImageTypeRegular)
defer emptyImage.Dispose()
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 := image.Rect(0, 0, w, h)
img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{emptyImage}, vs, is, graphicsdriver.BlendClear, dr, [graphics.ShaderImageCount]image.Rectangle{}, restorable.NearestFilterShader, nil, false)
}
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func TestShader(t *testing.T) {
img := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
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defer img.Dispose()
s := restorable.NewShader(etesting.ShaderProgramFill(0xff, 0, 0, 0xff))
dr := image.Rect(0, 0, 1, 1)
img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
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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 {
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t.Fatal(err)
}
want := color.RGBA{R: 0xff, A: 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0, 1, 1)
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if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderChain(t *testing.T) {
const num = 10
imgs := []*restorable.Image{}
for i := 0; i < num; i++ {
img := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
defer img.Dispose()
imgs = append(imgs, img)
}
imgs[0].WritePixels([]byte{0xff, 0, 0, 0xff}, image.Rect(0, 0, 1, 1))
s := restorable.NewShader(etesting.ShaderProgramImages(1))
for i := 0; i < num-1; i++ {
dr := image.Rect(0, 0, 1, 1)
imgs[i+1].DrawTriangles([graphics.ShaderImageCount]*restorable.Image{imgs[i]}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
}
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
for i, img := range imgs {
want := color.RGBA{R: 0xff, A: 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
t.Errorf("%d: got %v, want %v", i, got, want)
}
}
}
func TestShaderMultipleSources(t *testing.T) {
var srcs [graphics.ShaderImageCount]*restorable.Image
for i := range srcs {
srcs[i] = restorable.NewImage(1, 1, restorable.ImageTypeRegular)
}
srcs[0].WritePixels([]byte{0x40, 0, 0, 0xff}, image.Rect(0, 0, 1, 1))
srcs[1].WritePixels([]byte{0, 0x80, 0, 0xff}, image.Rect(0, 0, 1, 1))
srcs[2].WritePixels([]byte{0, 0, 0xc0, 0xff}, image.Rect(0, 0, 1, 1))
dst := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
s := restorable.NewShader(etesting.ShaderProgramImages(3))
dr := image.Rect(0, 0, 1, 1)
dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
// Clear one of the sources after DrawTriangles. dst should not be affected.
clearImage(srcs[0], 1, 1)
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
want := color.RGBA{R: 0x40, G: 0x80, B: 0xc0, A: 0xff}
got := pixelsToColor(dst.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderMultipleSourcesOnOneTexture(t *testing.T) {
src := restorable.NewImage(3, 1, restorable.ImageTypeRegular)
src.WritePixels([]byte{
0x40, 0, 0, 0xff,
0, 0x80, 0, 0xff,
0, 0, 0xc0, 0xff,
}, image.Rect(0, 0, 3, 1))
srcs := [graphics.ShaderImageCount]*restorable.Image{src, src, src}
dst := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
s := restorable.NewShader(etesting.ShaderProgramImages(3))
dr := image.Rect(0, 0, 1, 1)
srcRegions := [graphics.ShaderImageCount]image.Rectangle{
image.Rect(0, 0, 1, 1),
image.Rect(1, 0, 2, 1),
image.Rect(2, 0, 3, 1),
}
dst.DrawTriangles(srcs, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, srcRegions, s, nil, false)
// Clear one of the sources after DrawTriangles. dst should not be affected.
clearImage(srcs[0], 3, 1)
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
want := color.RGBA{R: 0x40, G: 0x80, B: 0xc0, A: 0xff}
got := pixelsToColor(dst.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}
func TestShaderDispose(t *testing.T) {
img := restorable.NewImage(1, 1, restorable.ImageTypeRegular)
defer img.Dispose()
s := restorable.NewShader(etesting.ShaderProgramFill(0xff, 0, 0, 0xff))
dr := image.Rect(0, 0, 1, 1)
img.DrawTriangles([graphics.ShaderImageCount]*restorable.Image{}, quadVertices(1, 1, 0, 0), graphics.QuadIndices(), graphicsdriver.BlendCopy, dr, [graphics.ShaderImageCount]image.Rectangle{}, s, nil, false)
// Dispose the shader. This should invalidate all the images using this shader i.e., all the images become
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// stale.
s.Dispose()
if err := restorable.ResolveStaleImages(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
if err := restorable.RestoreIfNeeded(ui.GraphicsDriverForTesting()); err != nil {
t.Fatal(err)
}
want := color.RGBA{R: 0xff, A: 0xff}
got := pixelsToColor(img.BasePixelsForTesting(), 0, 0, 1, 1)
if !sameColors(got, want, 1) {
t.Errorf("got %v, want %v", got, want)
}
}