| // Copyright 2024 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Package node holds common code for running dawn/node |
| package node |
| |
| import ( |
| "fmt" |
| "strings" |
| ) |
| |
| // Flags for running dawn/node |
| type Flags []string |
| |
| func (f *Flags) String() string { |
| return strings.Join(*f, "") |
| } |
| |
| // Set sets a dawn flag |
| func (f *Flags) Set(value string) error { |
| // Multiple flags must be passed in individually: |
| // -flag=a=b -dawn_node_flag=c=d |
| *f = append(*f, value) |
| return nil |
| } |
| |
| // Consolidates all the delimiter separated flags with a given prefix into a single flag. |
| // Example: |
| // Given the flags: ["foo=a", "bar", "foo=b,c"] |
| // GlobListFlags("foo=", ",") will transform the flags to: ["bar", "foo=a,b,c"] |
| func (f *Flags) GlobListFlags(prefix string, delimiter string) { |
| list := []string{} |
| i := 0 |
| for _, flag := range *f { |
| if strings.HasPrefix(flag, prefix) { |
| // Trim the prefix. |
| value := flag[len(prefix):] |
| // Extract the deliminated values. |
| list = append(list, strings.Split(value, delimiter)...) |
| } else { |
| (*f)[i] = flag |
| i++ |
| } |
| } |
| (*f) = (*f)[:i] |
| if len(list) > 0 { |
| // Append back the consolidated flags. |
| f.Set(prefix + strings.Join(list, delimiter)) |
| } |
| } |
| |
| // Options that can be passed to Flags.SetOptions |
| type Options struct { |
| BinDir string |
| Backend string |
| Adapter string |
| Validate bool |
| AllowUnsafeAPIs bool |
| DumpShaders bool |
| UseFXC bool |
| UseIR bool |
| } |
| |
| func (f *Flags) SetOptions(opts Options) error { |
| // For Windows, set the DLL directory to bin so that Dawn loads dxcompiler.dll from there. |
| f.Set("dlldir=" + opts.BinDir) |
| |
| // Forward the backend and adapter to use, if specified. |
| if opts.Backend != "" && opts.Backend != "default" { |
| fmt.Println("Forcing backend to", opts.Backend) |
| f.Set("backend=" + opts.Backend) |
| } |
| if opts.Adapter != "" { |
| f.Set("adapter=" + opts.Adapter) |
| } |
| if opts.Validate { |
| f.Set("validate=1") |
| } |
| |
| if opts.AllowUnsafeAPIs { |
| f.Set("enable-dawn-features=allow_unsafe_apis") |
| } |
| if opts.DumpShaders { |
| f.Set("enable-dawn-features=dump_shaders,disable_symbol_renaming") |
| } |
| if opts.UseFXC { |
| f.Set("disable-dawn-features=use_dxc") |
| } |
| if opts.UseIR { |
| f.Set("enable-dawn-features=use_tint_ir") |
| } |
| f.GlobListFlags("enable-dawn-features=", ",") |
| |
| return nil |
| } |