ebiten/examples/shaderprecomp/metallib/gen.go

99 lines
2.4 KiB
Go

// 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
// This is a program to generate precompiled Metal libraries.
//
// See https://developer.apple.com/documentation/metal/shader_libraries/building_a_shader_library_by_precompiling_source_files.
package main
import (
"os"
"os/exec"
"path/filepath"
"github.com/hajimehoshi/ebiten/v2/shaderprecomp"
)
func main() {
if err := run(); err != nil {
panic(err)
}
}
func run() error {
tmpdir, err := os.MkdirTemp("", "")
if err != nil {
return err
}
defer os.RemoveAll(tmpdir)
srcs := shaderprecomp.AppendBuildinShaderSources(nil)
defaultSrcBytes, err := os.ReadFile(filepath.Join("..", "defaultshader.go"))
if err != nil {
return err
}
defaultSrc, err := shaderprecomp.NewShaderSource(defaultSrcBytes)
if err != nil {
return err
}
srcs = append(srcs, defaultSrc)
for _, src := range srcs {
// Avoid using errgroup.Group.
// Compiling sources in parallel causes a mixed error message on the console.
if err := compile(src, tmpdir); err != nil {
return err
}
}
return nil
}
func compile(source *shaderprecomp.ShaderSource, tmpdir string) error {
id := source.ID().String()
metalFilePath := filepath.Join(tmpdir, id+".metal")
f, err := os.Create(metalFilePath)
if err != nil {
return err
}
defer f.Close()
if err := shaderprecomp.CompileToMSL(f, source); err != nil {
return err
}
if err := f.Sync(); err != nil {
return err
}
irFilePath := filepath.Join(tmpdir, id+".ir")
cmd := exec.Command("xcrun", "-sdk", "macosx", "metal", "-o", irFilePath, "-c", metalFilePath)
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
metallibFilePath := id + ".metallib"
cmd = exec.Command("xcrun", "-sdk", "macosx", "metallib", "-o", metallibFilePath, irFilePath)
cmd.Stderr = os.Stderr
if err := cmd.Run(); err != nil {
return err
}
return nil
}