mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-12-25 03:08:54 +01:00
728 lines
14 KiB
Go
728 lines
14 KiB
Go
// Copyright 2020 The Ebiten Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ebiten_test
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import (
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"image/color"
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"testing"
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. "github.com/hajimehoshi/ebiten"
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)
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func TestShaderFill(t *testing.T) {
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const w, h = 16, 16
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dst, _ := NewImage(w, h, FilterDefault)
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s, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(1, 0, 0, 1)
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}
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`))
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if err != nil {
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t.Fatal(err)
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}
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dst.DrawRectShader(w/2, h/2, s, nil)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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got := dst.At(i, j).(color.RGBA)
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var want color.RGBA
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if i < w/2 && j < h/2 {
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want = color.RGBA{0xff, 0, 0, 0xff}
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}
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if got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
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}
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}
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}
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func TestShaderFillWithDrawImage(t *testing.T) {
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const w, h = 16, 16
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dst, _ := NewImage(w, h, FilterDefault)
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s, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(1, 0, 0, 1)
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}
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`))
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if err != nil {
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t.Fatal(err)
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}
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src, _ := NewImage(w/2, h/2, FilterDefault)
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op := &DrawImageOptions{}
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op.Shader = s
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dst.DrawImage(src, op)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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got := dst.At(i, j).(color.RGBA)
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var want color.RGBA
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if i < w/2 && j < h/2 {
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want = color.RGBA{0xff, 0, 0, 0xff}
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}
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if got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
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}
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}
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}
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func TestShaderFunction(t *testing.T) {
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const w, h = 16, 16
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dst, _ := NewImage(w, h, FilterDefault)
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s, err := NewShader([]byte(`package main
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func clr(red float) (float, float, float, float) {
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return red, 0, 0, 1
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(clr(1))
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}
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`))
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if err != nil {
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t.Fatal(err)
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}
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dst.DrawRectShader(w, h, s, nil)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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got := dst.At(i, j).(color.RGBA)
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want := color.RGBA{0xff, 0, 0, 0xff}
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if got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
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}
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}
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}
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func TestShaderShadowing(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var position vec4
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return position
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderDuplicatedVariables(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var foo vec4
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var foo vec4
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return foo
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var foo, foo vec4
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return foo
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var foo vec4
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foo := vec4(0)
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return foo
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (vec4, vec4) {
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return vec4(0), vec4(0)
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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foo, foo := Foo()
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return foo
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderNoMain(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderNoNewVariables(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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_ := 1
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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_, _ := 1, 1
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (int, int) {
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return 1, 1
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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_, _ := Foo()
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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a, _ := 1, 1
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_ = a
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return vec4(0)
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}
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`)); err != nil {
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t.Error(err)
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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_, a := 1, 1
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_ = a
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return vec4(0)
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}
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`)); err != nil {
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t.Error(err)
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}
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}
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func TestShaderWrongReturn(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return 0.0
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (float, float) {
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return 0
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() float {
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderMultipleValueReturn(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Foo() (float, float) {
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return 0.0
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() float {
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return 0.0, 0.0
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (float, float, float) {
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return 0.0, 0.0
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (float, float) {
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return 0.0, 0.0
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}
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func Foo2() (float, float, float) {
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return Foo()
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Foo() (float, float, float) {
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return 0.0, 0.0, 0.0
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}
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func Foo2() (float, float, float) {
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return Foo()
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0.0)
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}
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`)); err != nil {
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t.Error(err)
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}
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}
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func TestShaderInit(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func init() {
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}
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderUnspportedSyntax(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := func() {
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}
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_ = x
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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go func() {
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}()
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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ch := make(chan int)
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_ = ch
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := 1i
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_ = x
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var x [4]float
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y := x[1:2]
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_ = y
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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var x [4]float
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y := x[1:2:3]
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_ = y
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderUninitializedUniformVariables(t *testing.T) {
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const w, h = 16, 16
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dst, _ := NewImage(w, h, FilterDefault)
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s, err := NewShader([]byte(`package main
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var U vec4
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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return U
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}
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`))
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if err != nil {
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t.Fatal(err)
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}
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dst.DrawRectShader(w, h, s, nil)
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for j := 0; j < h; j++ {
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for i := 0; i < w; i++ {
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got := dst.At(i, j).(color.RGBA)
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var want color.RGBA
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if got != want {
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t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
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}
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}
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}
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}
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func TestShaderForbidAssigningSpecialVariables(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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var U vec4
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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U = vec4(0)
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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var U vec4
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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U.x = 0
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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var U [2]vec4
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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U[0] = vec4(0)
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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texCoord = vec2(0)
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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texCoord.x = 0
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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}
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func TestShaderBoolLiteral(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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true := vec4(0)
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return true
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}
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`)); err != nil {
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t.Errorf("error must be nil but was non-nil")
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}
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}
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func TestShaderUnusedVariable(t *testing.T) {
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := 0
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := 0
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x = 1
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return vec4(0)
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}
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`)); err == nil {
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t.Errorf("error must be non-nil but was nil")
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}
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if _, err := NewShader([]byte(`package main
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := vec4(0)
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x.x = 1
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return vec4(0)
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}
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`)); err != nil {
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t.Error(err)
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}
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|
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// Increment statement treats a variable 'used'.
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// https://play.golang.org/p/2RuYMrSLjt3
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if _, err := NewShader([]byte(`package main
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|
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func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
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x := 0
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x++
|
|
return vec4(0)
|
|
}
|
|
`)); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
var a int
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
var a, b int
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
}
|
|
|
|
func TestShaderBlankLhs(t *testing.T) {
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
x := _
|
|
_ = x
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
var x int = _
|
|
_ = x
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
x := 1
|
|
x = _
|
|
_ = x
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
x := 1 + _
|
|
_ = x
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
_++
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
_ += 1
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
_.x = 1
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
}
|
|
|
|
func TestShaderMatrix(t *testing.T) {
|
|
const w, h = 16, 16
|
|
|
|
dst, _ := NewImage(w, h, FilterDefault)
|
|
s, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
var a, b mat4
|
|
a[0] = vec4(0.125, 0.0625, 0.0625, 0.0625)
|
|
a[1] = vec4(0.25, 0.25, 0.0625, 0.1875)
|
|
a[2] = vec4(0.1875, 0.125, 0.25, 0.25)
|
|
a[3] = vec4(0.0625, 0.1875, 0.125, 0.25)
|
|
b[0] = vec4(0.0625, 0.125, 0.0625, 0.125)
|
|
b[1] = vec4(0.125, 0.1875, 0.25, 0.0625)
|
|
b[2] = vec4(0.125, 0.125, 0.1875, 0.1875)
|
|
b[3] = vec4(0.25, 0.0625, 0.125, 0.0625)
|
|
return vec4((a * b * vec4(1, 1, 1, 1)).xyz, 1)
|
|
}
|
|
`))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
src, _ := NewImage(w, h, FilterDefault)
|
|
op := &DrawImageOptions{}
|
|
op.Shader = s
|
|
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{87, 82, 71, 255}
|
|
if got != want {
|
|
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|