mirror of
https://github.com/hajimehoshi/ebiten.git
synced 2024-11-10 04:57:26 +01:00
80 lines
2.5 KiB
Go
80 lines
2.5 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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package shaderprecomp
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import (
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"github.com/hajimehoshi/ebiten/v2/internal/builtinshader"
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"github.com/hajimehoshi/ebiten/v2/internal/graphics"
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"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
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)
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// AppendBuildinShaderSources appends all the built-in shader sources to the given slice.
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//
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// Do not modify the content of the shader source.
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//
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// AppendBuildinShaderSources is concurrent-safe.
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func AppendBuildinShaderSources(sources []*ShaderSource) []*ShaderSource {
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for _, s := range builtinshader.AppendShaderSources(nil) {
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src, err := NewShaderSource(s)
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if err != nil {
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panic(err)
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}
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sources = append(sources, src)
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}
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return sources
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}
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// ShaderSource is an object encapsulating a shader source code.
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type ShaderSource struct {
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source []byte
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id ShaderSourceID
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}
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// NewShaderSource creates a new ShaderSource object from the given source code.
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func NewShaderSource(source []byte) (*ShaderSource, error) {
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hash, err := graphics.CalcSourceHash(source)
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if err != nil {
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return nil, err
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}
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return &ShaderSource{
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source: source,
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id: ShaderSourceID(hash),
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}, nil
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}
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// ID returns a unique identifier for the shader source.
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// The ShaderSourceID value must be the same for the same shader source and the same Ebitengine version.
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// There is no guarantee that the ShaderSourceID value is the same between different Ebitengine versions.
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func (s *ShaderSource) ID() ShaderSourceID {
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return s.id
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}
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// ShaderSourceID is a uniuqe identifier for a shader source.
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type ShaderSourceID [16]byte
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// ParseSourceID parses a string representation of the shader source ID.
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func ParseSourceID(s string) (ShaderSourceID, error) {
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h, err := shaderir.ParseSourceHash(s)
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if err != nil {
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return ShaderSourceID{}, err
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}
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return ShaderSourceID(h), nil
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}
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// String returns a string representation of the shader source ID.
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func (s ShaderSourceID) String() string {
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return shaderir.SourceHash(s).String()
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}
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