mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
b1d7a5f595
With WebGL1, an extension is required for dFdx. On the other hand, with WebGL2, GLSL ES 300 is required and the extension is forbidden. This change fixes shaderir/glsl to switch the output depends on the WebGL version. This change also adds a new build tag 'ebitenwebgl1' forcing WebGL 1. Updates #1404
980 lines
19 KiB
Go
980 lines
19 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"
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"image/color"
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"testing"
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. "github.com/hajimehoshi/ebiten/v2"
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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)
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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)
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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)
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op := &DrawRectShaderOptions{}
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op.Images[0] = src
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dst.DrawRectShader(w/2, h/2, s, 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 TestShaderFillWithDrawTriangles(t *testing.T) {
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const w, h = 16, 16
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dst := NewImage(w, h)
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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)
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op := &DrawTrianglesShaderOptions{}
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op.Images[0] = src
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vs := []Vertex{
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{
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DstX: 0,
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DstY: 0,
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SrcX: 0,
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SrcY: 0,
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ColorR: 1,
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ColorG: 1,
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ColorB: 1,
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ColorA: 1,
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},
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{
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DstX: w,
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DstY: 0,
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SrcX: w / 2,
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SrcY: 0,
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ColorR: 1,
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ColorG: 1,
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ColorB: 1,
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ColorA: 1,
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},
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{
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DstX: 0,
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DstY: h,
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SrcX: 0,
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SrcY: h / 2,
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ColorR: 1,
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ColorG: 1,
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ColorB: 1,
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ColorA: 1,
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},
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{
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DstX: w,
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DstY: h,
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SrcX: w / 2,
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SrcY: h / 2,
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ColorR: 1,
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ColorG: 1,
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ColorB: 1,
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ColorA: 1,
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},
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}
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is := []uint16{0, 1, 2, 1, 2, 3}
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dst.DrawTrianglesShader(vs, is, s, 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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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 TestShaderFunction(t *testing.T) {
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const w, h = 16, 16
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dst := NewImage(w, h)
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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)
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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 {
|
|
U[0] = vec4(0)
|
|
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 {
|
|
texCoord = vec2(0)
|
|
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 {
|
|
texCoord.x = 0
|
|
return vec4(0)
|
|
}
|
|
`)); err == nil {
|
|
t.Errorf("error must be non-nil but was nil")
|
|
}
|
|
}
|
|
|
|
func TestShaderBoolLiteral(t *testing.T) {
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
true := vec4(0)
|
|
return true
|
|
}
|
|
`)); err != nil {
|
|
t.Errorf("error must be nil but was non-nil")
|
|
}
|
|
}
|
|
|
|
func TestShaderUnusedVariable(t *testing.T) {
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
x := 0
|
|
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 := 0
|
|
x = 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 := vec4(0)
|
|
x.x = 1
|
|
return vec4(0)
|
|
}
|
|
`)); err != nil {
|
|
t.Error(err)
|
|
}
|
|
|
|
// Increment statement treats a variable 'used'.
|
|
// https://play.golang.org/p/2RuYMrSLjt3
|
|
if _, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
x := 0
|
|
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)
|
|
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)
|
|
op := &DrawRectShaderOptions{}
|
|
op.Images[0] = src
|
|
dst.DrawRectShader(w, h, s, 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)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestShaderSubImage(t *testing.T) {
|
|
const w, h = 16, 16
|
|
|
|
s, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
r := imageSrc0At(texCoord).r
|
|
g := imageSrc1At(texCoord).g
|
|
return vec4(r, g, 0, 1)
|
|
}
|
|
`))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
src0 := NewImage(w, h)
|
|
pix0 := make([]byte, 4*w*h)
|
|
for j := 0; j < h; j++ {
|
|
for i := 0; i < w; i++ {
|
|
if 2 <= i && i < 10 && 3 <= j && j < 11 {
|
|
pix0[4*(j*w+i)] = 0xff
|
|
pix0[4*(j*w+i)+1] = 0
|
|
pix0[4*(j*w+i)+2] = 0
|
|
pix0[4*(j*w+i)+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
src0.ReplacePixels(pix0)
|
|
src0 = src0.SubImage(image.Rect(2, 3, 10, 11)).(*Image)
|
|
|
|
src1 := NewImage(w, h)
|
|
pix1 := make([]byte, 4*w*h)
|
|
for j := 0; j < h; j++ {
|
|
for i := 0; i < w; i++ {
|
|
if 6 <= i && i < 14 && 8 <= j && j < 16 {
|
|
pix1[4*(j*w+i)] = 0
|
|
pix1[4*(j*w+i)+1] = 0xff
|
|
pix1[4*(j*w+i)+2] = 0
|
|
pix1[4*(j*w+i)+3] = 0xff
|
|
}
|
|
}
|
|
}
|
|
src1.ReplacePixels(pix1)
|
|
src1 = src1.SubImage(image.Rect(6, 8, 14, 16)).(*Image)
|
|
|
|
testPixels := func(testname string, dst *Image) {
|
|
for j := 0; j < h; j++ {
|
|
for i := 0; i < w; i++ {
|
|
got := dst.At(i, j).(color.RGBA)
|
|
var want color.RGBA
|
|
if i < w/2 && j < h/2 {
|
|
want = color.RGBA{0xff, 0xff, 0, 0xff}
|
|
}
|
|
if got != want {
|
|
t.Errorf("%s dst.At(%d, %d): got: %v, want: %v", testname, i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
t.Run("DrawRectShader", func(t *testing.T) {
|
|
dst := NewImage(w, h)
|
|
op := &DrawRectShaderOptions{}
|
|
op.Images[0] = src0
|
|
op.Images[1] = src1
|
|
dst.DrawRectShader(w/2, h/2, s, op)
|
|
testPixels("DrawRectShader", dst)
|
|
})
|
|
|
|
t.Run("DrawTrianglesShader", func(t *testing.T) {
|
|
dst := NewImage(w, h)
|
|
vs := []Vertex{
|
|
{
|
|
DstX: 0,
|
|
DstY: 0,
|
|
SrcX: 2,
|
|
SrcY: 3,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: w / 2,
|
|
DstY: 0,
|
|
SrcX: 10,
|
|
SrcY: 3,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: 0,
|
|
DstY: h / 2,
|
|
SrcX: 2,
|
|
SrcY: 11,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
{
|
|
DstX: w / 2,
|
|
DstY: h / 2,
|
|
SrcX: 10,
|
|
SrcY: 11,
|
|
ColorR: 1,
|
|
ColorG: 1,
|
|
ColorB: 1,
|
|
ColorA: 1,
|
|
},
|
|
}
|
|
is := []uint16{0, 1, 2, 1, 2, 3}
|
|
|
|
op := &DrawTrianglesShaderOptions{}
|
|
op.Images[0] = src0
|
|
op.Images[1] = src1
|
|
dst.DrawTrianglesShader(vs, is, s, op)
|
|
testPixels("DrawTrianglesShader", dst)
|
|
})
|
|
}
|
|
|
|
// Issue #1404
|
|
func TestShaderDerivatives(t *testing.T) {
|
|
const w, h = 16, 16
|
|
|
|
s, err := NewShader([]byte(`package main
|
|
|
|
func Fragment(position vec4, texCoord vec2, color vec4) vec4 {
|
|
p := imageSrc0At(texCoord)
|
|
return vec4(abs(dfdx(p.r)), abs(dfdy(p.g)), 0, 1)
|
|
}
|
|
`))
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
dst := NewImage(w, h)
|
|
src := NewImage(w, h)
|
|
pix := make([]byte, 4*w*h)
|
|
for j := 0; j < h; j++ {
|
|
for i := 0; i < w; i++ {
|
|
if i < w/2 {
|
|
pix[4*(j*w+i)] = 0xff
|
|
}
|
|
if j < h/2 {
|
|
pix[4*(j*w+i)+1] = 0xff
|
|
}
|
|
pix[4*(j*w+i)+3] = 0xff
|
|
}
|
|
}
|
|
src.ReplacePixels(pix)
|
|
|
|
op := &DrawRectShaderOptions{}
|
|
op.Images[0] = src
|
|
dst.DrawRectShader(w, h, s, op)
|
|
|
|
// The results of the edges might be unreliable. Skip the edges.
|
|
for j := 1; j < h-1; j++ {
|
|
for i := 1; i < w-1; i++ {
|
|
got := dst.At(i, j).(color.RGBA)
|
|
want := color.RGBA{0, 0, 0, 0xff}
|
|
if i == w/2-1 || i == w/2 {
|
|
want.R = 0xff
|
|
}
|
|
if j == h/2-1 || j == h/2 {
|
|
want.G = 0xff
|
|
}
|
|
if got != want {
|
|
t.Errorf("dst.At(%d, %d): got: %v, want: %v", i, j, got, want)
|
|
}
|
|
}
|
|
}
|
|
}
|