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internal/builtinshader: add shader constants for shaderlister

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Updates #3157
This commit is contained in:
Hajime Hoshi 2024-11-16 15:01:38 +09:00
parent 864f826b3c
commit d021209d84
4 changed files with 147 additions and 6 deletions
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2
gameforui.go
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@ -144,7 +144,7 @@ var (
// in your implementation of [FinalScreenDrawer], for example.
func DefaultDrawFinalScreen(screen FinalScreen, offscreen *Image, geoM GeoM) {
theScreenShaderOnce.Do(func() {
s, err := newShader(builtinshader.ScreenShaderSource, "screen")
s, err := newShader([]byte(builtinshader.ScreenShaderSource), "screen")
if err != nil {
panic(fmt.Sprintf("ebiten: compiling the screen shader failed: %v", err))
}

53
internal/builtinshader/defs.go Normal file
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@ -0,0 +1,53 @@
// Code generated by gen.go using 'go generate'. DO NOT EDIT.
// Copyright 2024 The Ebitengine 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 builtinshader
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0UnsafeAt(srcPos)\n\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0UnsafeAt(srcPos)\n\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0At(srcPos)\n\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0At(srcPos)\n\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\nfunc adjustSrcPosForAddressRepeat(p vec2) vec2 {\n\torigin := imageSrc0Origin()\n\tsize := imageSrc0Size()\n\treturn mod(p - origin, size) + origin\n}\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0At(adjustSrcPosForAddressRepeat(srcPos))\n\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\nfunc adjustSrcPosForAddressRepeat(p vec2) vec2 {\n\torigin := imageSrc0Origin()\n\tsize := imageSrc0Size()\n\treturn mod(p - origin, size) + origin\n}\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\n\tclr := imageSrc0At(adjustSrcPosForAddressRepeat(srcPos))\n\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\n\n\tc0 := imageSrc0UnsafeAt(p0)\n\tc1 := imageSrc0UnsafeAt(vec2(p1.x, p0.y))\n\tc2 := imageSrc0UnsafeAt(vec2(p0.x, p1.y))\n\tc3 := imageSrc0UnsafeAt(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\n\n\tc0 := imageSrc0UnsafeAt(p0)\n\tc1 := imageSrc0UnsafeAt(vec2(p1.x, p0.y))\n\tc2 := imageSrc0UnsafeAt(vec2(p0.x, p1.y))\n\tc3 := imageSrc0UnsafeAt(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\n\n\tc0 := imageSrc0At(p0)\n\tc1 := imageSrc0At(vec2(p1.x, p0.y))\n\tc2 := imageSrc0At(vec2(p0.x, p1.y))\n\tc3 := imageSrc0At(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\n\n\tc0 := imageSrc0At(p0)\n\tc1 := imageSrc0At(vec2(p1.x, p0.y))\n\tc2 := imageSrc0At(vec2(p0.x, p1.y))\n\tc3 := imageSrc0At(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\n\n\nfunc adjustSrcPosForAddressRepeat(p vec2) vec2 {\n\torigin := imageSrc0Origin()\n\tsize := imageSrc0Size()\n\treturn mod(p - origin, size) + origin\n}\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\tp0 = adjustSrcPosForAddressRepeat(p0)\n\tp1 = adjustSrcPosForAddressRepeat(p1)\n\n\n\n\tc0 := imageSrc0At(p0)\n\tc1 := imageSrc0At(vec2(p1.x, p0.y))\n\tc2 := imageSrc0At(vec2(p0.x, p1.y))\n\tc3 := imageSrc0At(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Apply the color scale.\n\tclr *= color\n\n\n\treturn clr\n}\n\n"
//ebitengine:shader
const _ = "//kage:unit pixels\n\npackage main\n\n\nvar ColorMBody mat4\nvar ColorMTranslation vec4\n\n\n\nfunc adjustSrcPosForAddressRepeat(p vec2) vec2 {\n\torigin := imageSrc0Origin()\n\tsize := imageSrc0Size()\n\treturn mod(p - origin, size) + origin\n}\n\n\nfunc Fragment(dstPos vec4, srcPos vec2, color vec4) vec4 {\n\n\tp0 := srcPos - 1/2.0\n\tp1 := srcPos + 1/2.0\n\n\n\tp0 = adjustSrcPosForAddressRepeat(p0)\n\tp1 = adjustSrcPosForAddressRepeat(p1)\n\n\n\n\tc0 := imageSrc0At(p0)\n\tc1 := imageSrc0At(vec2(p1.x, p0.y))\n\tc2 := imageSrc0At(vec2(p0.x, p1.y))\n\tc3 := imageSrc0At(p1)\n\n\n\trate := fract(p1)\n\tclr := mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)\n\n\n\n\t// Un-premultiply alpha.\n\t// When the alpha is 0, 1-sign(alpha) is 1.0, which means division does nothing.\n\tclr.rgb /= clr.a + (1-sign(clr.a))\n\t// Apply the clr matrix.\n\tclr = (ColorMBody * clr) + ColorMTranslation\n\t// Premultiply alpha\n\tclr.rgb *= clr.a\n\t// Apply the color scale.\n\tclr *= color\n\t// Clamp the output.\n\tclr.rgb = min(clr.rgb, clr.a)\n\n\n\treturn clr\n}\n\n"

84
internal/builtinshader/gen.go Normal file
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@ -0,0 +1,84 @@
// Copyright 2024 The Ebitengine 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.
//go:build ignore
package main
import (
"bufio"
"fmt"
"os"
"github.com/hajimehoshi/ebiten/v2/internal/builtinshader"
)
func main() {
if err := xmain(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
const license = `// Copyright 2024 The Ebitengine 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.
`
func xmain() error {
f, err := os.Create("defs.go")
if err != nil {
return err
}
defer f.Close()
w := bufio.NewWriter(f)
if _, err := w.WriteString("// Code generated by gen.go using 'go generate'. DO NOT EDIT.\n\n"); err != nil {
return err
}
if _, err := w.WriteString(license); err != nil {
return err
}
if _, err := w.WriteString("\npackage builtinshader\n"); err != nil {
return err
}
for _, s := range builtinshader.AppendShaderSources(nil) {
if _, err := w.WriteString("\n"); err != nil {
return err
}
if _, err := w.WriteString("//ebitengine:shader\n"); err != nil {
return err
}
if _, err := fmt.Fprintf(w, "const _ = %q\n", s); err != nil {
return err
}
}
if err := w.Flush(); err != nil {
return err
}
return nil
}

14
internal/builtinshader/shader.go
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@ -12,6 +12,9 @@
// See the License for the specific language governing permissions and
// limitations under the License.
//go:generate go run gen.go
//go:generate gofmt -s -w .
package builtinshader
import (
@ -166,7 +169,8 @@ func ShaderSource(filter Filter, address Address, useColorM bool) []byte {
return b
}
var ScreenShaderSource = []byte(`//kage:unit pixels
//ebitengine:shader
const ScreenShaderSource = `//kage:unit pixels
package main
@ -185,16 +189,17 @@ func Fragment(dstPos vec4, srcPos vec2) vec4 {
rate := clamp(fract(p1)*scale, 0, 1)
return mix(mix(c0, c1, rate.x), mix(c2, c3, rate.x), rate.y)
}
`)
`
var ClearShaderSource = []byte(`//kage:unit pixels
//ebitengine:shader
const ClearShaderSource = `//kage:unit pixels
package main
func Fragment() vec4 {
return vec4(0)
}
`)
`
func AppendShaderSources(sources [][]byte) [][]byte {
for filter := Filter(0); filter < FilterCount; filter++ {
@ -202,6 +207,5 @@ func AppendShaderSources(sources [][]byte) [][]byte {
sources = append(sources, ShaderSource(filter, address, false), ShaderSource(filter, address, true))
}
}
sources = append(sources, ScreenShaderSource, ClearShaderSource)
return sources
}