ebiten/internal/atlas/shader_test.go

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// Copyright 2021 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 atlas_test
import (
"image/color"
"testing"
"github.com/hajimehoshi/ebiten/v2/internal/atlas"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
"github.com/hajimehoshi/ebiten/v2/internal/graphicsdriver"
etesting "github.com/hajimehoshi/ebiten/v2/internal/testing"
"github.com/hajimehoshi/ebiten/v2/internal/ui"
)
func TestShaderFillTwice(t *testing.T) {
const w, h = 1, 1
dst := atlas.NewImage(w, h, atlas.ImageTypeRegular)
vs := quadVertices(w, h, 0, 0, 1)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
g := ui.GraphicsDriverForTesting()
s0 := atlas.NewShader(etesting.ShaderProgramFill(0xff, 0xff, 0xff, 0xff))
dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, s0, nil, false)
// Vertices must be recreated (#1755)
vs = quadVertices(w, h, 0, 0, 1)
s1 := atlas.NewShader(etesting.ShaderProgramFill(0x80, 0x80, 0x80, 0xff))
dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, s1, nil, false)
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pix := make([]byte, 4*w*h)
if err := dst.ReadPixels(g, pix); err != nil {
t.Error(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: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}
func TestImageDrawTwice(t *testing.T) {
const w, h = 1, 1
dst := atlas.NewImage(w, h, atlas.ImageTypeRegular)
src0 := atlas.NewImage(w, h, atlas.ImageTypeRegular)
src0.WritePixels([]byte{0xff, 0xff, 0xff, 0xff}, 0, 0, w, h)
src1 := atlas.NewImage(w, h, atlas.ImageTypeRegular)
src1.WritePixels([]byte{0x80, 0x80, 0x80, 0xff}, 0, 0, w, h)
vs := quadVertices(w, h, 0, 0, 1)
is := graphics.QuadIndices()
dr := graphicsdriver.Region{
X: 0,
Y: 0,
Width: w,
Height: h,
}
dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src0}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, atlas.NearestFilterShader, nil, false)
// Vertices must be recreated (#1755)
vs = quadVertices(w, h, 0, 0, 1)
dst.DrawTriangles([graphics.ShaderImageCount]*atlas.Image{src1}, vs, is, graphicsdriver.BlendCopy, dr, graphicsdriver.Region{}, [graphics.ShaderImageCount - 1][2]float32{}, atlas.NearestFilterShader, nil, false)
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pix := make([]byte, 4*w*h)
if err := dst.ReadPixels(ui.GraphicsDriverForTesting(), pix); err != nil {
t.Error(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: 0xff}); got != want {
t.Errorf("got: %v, want: %v", got, want)
}
}