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shader.go
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shader.go
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// Copyright 2020 The Ebiten 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.
package restorable
import (
"fmt"
"github.com/hajimehoshi/ebiten/v2/internal/builtinshader"
"github.com/hajimehoshi/ebiten/v2/internal/graphics"
"github.com/hajimehoshi/ebiten/v2/internal/graphicscommand"
"github.com/hajimehoshi/ebiten/v2/internal/shaderir"
)
type Shader struct {
shader *graphicscommand.Shader
ir *shaderir.Program
}
func NewShader(ir *shaderir.Program) *Shader {
s := &Shader{
shader: graphicscommand.NewShader(ir),
ir: ir,
}
theImages.addShader(s)
return s
}
func (s *Shader) Dispose() {
theImages.removeShader(s)
s.shader.Dispose()
s.shader = nil
s.ir = nil
}
func (s *Shader) restore() {
s.shader = graphicscommand.NewShader(s.ir)
}
var (
NearestFilterShader *Shader
LinearFilterShader *Shader
)
func init() {
{
ir, err := graphics.CompileShader([]byte(builtinshader.Shader(builtinshader.FilterNearest, builtinshader.AddressUnsafe, false)))
if err != nil {
panic(fmt.Sprintf("restorable: compiling the nearest shader failed: %v", err))
}
NearestFilterShader = NewShader(ir)
}
{
ir, err := graphics.CompileShader([]byte(builtinshader.Shader(builtinshader.FilterLinear, builtinshader.AddressUnsafe, false)))
if err != nil {
panic(fmt.Sprintf("restorable: compiling the linear shader failed: %v", err))
}
LinearFilterShader = NewShader(ir)
}
}