mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-14 15:07:26 +01:00
132 lines
3.8 KiB
Go
132 lines
3.8 KiB
Go
// Copyright 2024 The Ebitengine 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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//go:build ignore
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// This is a program to generate precompiled HLSL blobs (FXC files).
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//
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// See https://learn.microsoft.com/en-us/windows/win32/direct3dtools/fxc.
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package main
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import (
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"errors"
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"fmt"
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"os"
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"os/exec"
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"path/filepath"
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"github.com/hajimehoshi/ebiten/v2/shaderprecomp"
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)
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func main() {
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if err := run(); err != nil {
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panic(err)
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}
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}
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func run() error {
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if _, err := exec.LookPath("fxc.exe"); err != nil {
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if errors.Is(err, exec.ErrNotFound) {
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fmt.Fprintln(os.Stderr, "fxc.exe not found. Please install Windows SDK.")
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fmt.Fprintln(os.Stderr, "See https://learn.microsoft.com/en-us/windows/win32/direct3dtools/fxc for more details.")
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fmt.Fprintln(os.Stderr, "On PowerShell, you can add a path to the PATH environment variable temporarily like:")
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fmt.Fprintln(os.Stderr)
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fmt.Fprintln(os.Stderr, ` & (Get-Process -Id $PID).Path { $env:PATH="C:\Program Files (x86)\Windows Kits\10\bin\10.0.22621.0\x64;"+$env:PATH; go generate .\examples\shaderprecomp\fxc\ }`)
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fmt.Fprintln(os.Stderr)
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os.Exit(1)
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}
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return err
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}
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tmpdir, err := os.MkdirTemp("", "")
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if err != nil {
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return err
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}
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defer os.RemoveAll(tmpdir)
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srcs := shaderprecomp.AppendBuildinShaderSources(nil)
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defaultSrcBytes, err := os.ReadFile(filepath.Join("..", "defaultshader.go"))
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if err != nil {
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return err
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}
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defaultSrc, err := shaderprecomp.NewShaderSource(defaultSrcBytes)
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if err != nil {
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return err
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}
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srcs = append(srcs, defaultSrc)
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for _, src := range srcs {
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// Avoid using errgroup.Group.
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// Compiling sources in parallel causes a mixed error message on the console.
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if err := compile(src, tmpdir); err != nil {
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return err
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}
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}
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return nil
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}
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func generateHSLSFiles(source *shaderprecomp.ShaderSource, tmpdir string) (vs, ps string, err error) {
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id := source.ID().String()
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vsHLSLFilePath := filepath.Join(tmpdir, id+"_vs.hlsl")
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vsf, err := os.Create(vsHLSLFilePath)
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if err != nil {
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return "", "", err
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}
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defer vsf.Close()
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psHLSLFilePath := filepath.Join(tmpdir, id+"_ps.hlsl")
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psf, err := os.Create(psHLSLFilePath)
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if err != nil {
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return "", "", err
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}
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defer psf.Close()
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if err := shaderprecomp.CompileToHLSL(vsf, psf, source); err != nil {
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return "", "", err
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}
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return vsHLSLFilePath, psHLSLFilePath, nil
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}
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func compile(source *shaderprecomp.ShaderSource, tmpdir string) error {
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// Generate HLSL files. Make sure this process doesn't have any handlers of the files.
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// Without closing the files, fxc.exe cannot access the files.
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vsHLSLFilePath, psHLSLFilePath, err := generateHSLSFiles(source, tmpdir)
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if err != nil {
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return err
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}
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id := source.ID().String()
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vsFXCFilePath := id + "_vs.fxc"
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cmd := exec.Command("fxc.exe", "/nologo", "/O3", "/T", shaderprecomp.HLSLVertexShaderProfile, "/E", shaderprecomp.HLSLVertexShaderEntryPoint, "/Fo", vsFXCFilePath, vsHLSLFilePath)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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return err
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}
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psFXCFilePath := id + "_ps.fxc"
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cmd = exec.Command("fxc.exe", "/nologo", "/O3", "/T", shaderprecomp.HLSLPixelShaderProfile, "/E", shaderprecomp.HLSLPixelShaderEntryPoint, "/Fo", psFXCFilePath, psHLSLFilePath)
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cmd.Stdout = os.Stdout
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cmd.Stderr = os.Stderr
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if err := cmd.Run(); err != nil {
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return err
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}
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return nil
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}
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