mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2026-04-23 00:07:15 +08:00
Hajime Hoshi
b78d867e7a
Create a new internal/colormshader package that owns the color matrix shader generation, fully independent of internal/builtinshader. It has its own shader template with ColorM logic baked in, its own Filter/Address types, and a go:generate pipeline producing defs.go. This removes the useColorM dimension from internal/builtinshader, reducing it from 18 shader variants to 9. The colorm package now imports only colormshader (not builtinshader) for shader sources, preparing for the v2/v3 split where v2's colorm cannot access v3's builtinshader. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
99 lines
2.7 KiB
Go
99 lines
2.7 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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package main
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import (
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"bufio"
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"fmt"
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"os"
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"github.com/hajimehoshi/ebiten/v2/internal/builtinshader"
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)
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func main() {
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if err := xmain(); err != nil {
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fmt.Fprintln(os.Stderr, err)
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os.Exit(1)
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}
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}
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const license = `// 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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`
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const note = `// This file is intended for precompiled shaders that will be introduced in the future.
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// All constant names are underscores and not actually used,
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// so they do not affect the binary file size.
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`
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func xmain() error {
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f, err := os.Create("defs.go")
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if err != nil {
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return err
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}
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defer f.Close()
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w := bufio.NewWriter(f)
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if _, err := w.WriteString("// Code generated by gen.go using 'go generate'. DO NOT EDIT.\n\n"); err != nil {
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return err
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}
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if _, err := w.WriteString(license); err != nil {
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return err
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}
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if _, err := w.WriteString("\n"); err != nil {
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return err
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}
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if _, err := w.WriteString(note); err != nil {
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return err
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}
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if _, err := w.WriteString("\npackage builtinshader\n"); err != nil {
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return err
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}
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for filter := builtinshader.Filter(0); filter < builtinshader.FilterCount; filter++ {
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for address := builtinshader.Address(0); address < builtinshader.AddressCount; address++ {
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s := builtinshader.ShaderSource(filter, address)
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if _, err := w.WriteString("\n"); err != nil {
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return err
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}
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if _, err := w.WriteString("//ebitengine:shadersource\n"); err != nil {
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return err
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}
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if _, err := fmt.Fprintf(w, "const _ = %q\n", s); err != nil {
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return err
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}
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}
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}
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if err := w.Flush(); 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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