diff --git a/examples/shader/default.go b/examples/shader/default.go new file mode 100644 index 000000000..e4ee4a1c6 --- /dev/null +++ b/examples/shader/default.go @@ -0,0 +1,41 @@ +// Copyright 2020 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. + +// +build ignore + +package main + +var Time float +var Mouse vec2 + +// viewportSize is a predefined function. + +func Vertex(position vec2, texCoord vec2, color vec4) vec4 { + return mat4( + 2/viewportSize().x, 0, 0, 0, + 0, 2/viewportSize().y, 0, 0, + 0, 0, 1, 0, + -1, -1, 0, 1, + ) * vec4(position, 0, 1) +} + +func Fragment(position vec4) vec4 { + pos := position.xy/viewportSize() + Mouse/viewportSize()/4 + color := 0.0 + color += sin(pos.x*cos(Time/15)*80) + cos(pos.y*cos(Time/15)*10) + color += sin(pos.y*sin(Time/10)*40) + cos(pos.x*sin(Time/25)*40) + color += sin(pos.x*sin(Time/5)*10) + sin(pos.y*sin(Time/35)*80) + color *= sin(Time/10) * 0.5 + return vec4(color, color*0.5, sin(color+Time/3)*0.75, 1) +} diff --git a/examples/shader/default_go.go b/examples/shader/default_go.go new file mode 100644 index 000000000..b7d4f4dec --- /dev/null +++ b/examples/shader/default_go.go @@ -0,0 +1,6 @@ +// Code generated by file2byteslice. DO NOT EDIT. +// (gofmt is fine after generating) + +package main + +var default_go = []byte("// Copyright 2020 The Ebiten Authors\n//\n// Licensed under the Apache License, Version 2.0 (the \"License\");\n// you may not use this file except in compliance with the License.\n// You may obtain a copy of the License at\n//\n// http://www.apache.org/licenses/LICENSE-2.0\n//\n// Unless required by applicable law or agreed to in writing, software\n// distributed under the License is distributed on an \"AS IS\" BASIS,\n// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n// See the License for the specific language governing permissions and\n// limitations under the License.\n\n// +build ignore\n\npackage main\n\nvar Time float\nvar Mouse vec2\n\n// viewportSize is a predefined function.\n\nfunc Vertex(position vec2, texCoord vec2, color vec4) vec4 {\n\treturn mat4(\n\t\t2/viewportSize().x, 0, 0, 0,\n\t\t0, 2/viewportSize().y, 0, 0,\n\t\t0, 0, 1, 0,\n\t\t-1, -1, 0, 1,\n\t) * vec4(position, 0, 1)\n}\n\nfunc Fragment(position vec4) vec4 {\n\tpos := position.xy/viewportSize() + Mouse/viewportSize()/4\n\tcolor := 0.0\n\tcolor += sin(pos.x*cos(Time/15)*80) + cos(pos.y*cos(Time/15)*10)\n\tcolor += sin(pos.y*sin(Time/10)*40) + cos(pos.x*sin(Time/25)*40)\n\tcolor += sin(pos.x*sin(Time/5)*10) + sin(pos.y*sin(Time/35)*80)\n\tcolor *= sin(Time/10) * 0.5\n\treturn vec4(color, color*0.5, sin(color+Time/3)*0.75, 1)\n}\n") diff --git a/examples/shader/generate.go b/examples/shader/generate.go new file mode 100644 index 000000000..74805ab2b --- /dev/null +++ b/examples/shader/generate.go @@ -0,0 +1,17 @@ +// Copyright 2020 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 main + +//go:generate file2byteslice -package=main -input=default.go -output=default_go.go -var=default_go diff --git a/examples/shader/main.go b/examples/shader/main.go index 3bc149e60..e05225153 100644 --- a/examples/shader/main.go +++ b/examples/shader/main.go @@ -27,50 +27,37 @@ const ( screenHeight = 480 ) -const shaderSrc = `package main - -var Time float -var Mouse vec2 - -// viewportSize is a predefined function. - -func Vertex(position vec2, texCoord vec2, color vec4) vec4 { - return mat4( - 2/viewportSize().x, 0, 0, 0, - 0, 2/viewportSize().y, 0, 0, - 0, 0, 1, 0, - -1, -1, 0, 1, - ) * vec4(position, 0, 1) +var shaderSrcs = [][]byte{ + default_go, } -func Fragment(position vec4) vec4 { - pos := position.xy / viewportSize() + Mouse / viewportSize() / 4 - color := 0.0 - color += sin(pos.x * cos(Time / 15) * 80) + cos(pos.y * cos(Time / 15) * 10) - color += sin(pos.y * sin(Time / 10) * 40) + cos(pos.x * sin(Time / 25) * 40) - color += sin(pos.x * sin(Time / 5) * 10) + sin(pos.y * sin(Time / 35) * 80) - color *= sin(Time / 10) * 0.5 - return vec4(color, color * 0.5, sin(color + Time / 3 ) * 0.75, 1) -}` - type Game struct { - shader *ebiten.Shader - time int + shaders map[int]*ebiten.Shader + idx int + time int } func (g *Game) Update(screen *ebiten.Image) error { g.time++ - if g.shader == nil { - var err error - g.shader, err = ebiten.NewShader([]byte(shaderSrc)) + if g.shaders == nil { + g.shaders = map[int]*ebiten.Shader{} + } + if _, ok := g.shaders[g.idx]; !ok { + s, err := ebiten.NewShader([]byte(shaderSrcs[g.idx])) if err != nil { return err } + g.shaders[g.idx] = s } return nil } func (g *Game) Draw(screen *ebiten.Image) { + s, ok := g.shaders[g.idx] + if !ok { + return + } + w, h := screen.Size() vs := []ebiten.Vertex{ { @@ -99,7 +86,7 @@ func (g *Game) Draw(screen *ebiten.Image) { float32(g.time) / 60, // time []float32{float32(cx), float32(cy)}, // cursor } - screen.DrawTrianglesWithShader(vs, is, g.shader, op) + screen.DrawTrianglesWithShader(vs, is, s, op) } func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {