ebiten/compositemode.go

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// Copyright 2023 The Ebitengine 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 ebiten
import (
"fmt"
)
// CompositeMode represents Porter-Duff composition mode.
//
// Deprecated: as of v2.5. Use Blend instead.
type CompositeMode int
const (
// CompositeModeCustom indicates to refer Blend.
CompositeModeCustom CompositeMode = iota
// Deprecated: as of v2.5. Use BlendSourceOver instead.
CompositeModeSourceOver
// Deprecated: as of v2.5. Use BlendClear instead.
CompositeModeClear
// Deprecated: as of v2.5. Use BlendCopy instead.
CompositeModeCopy
// Deprecated: as of v2.5. Use BlendDestination instead.
CompositeModeDestination
// Deprecated: as of v2.5. Use BlendDestinationOver instead.
CompositeModeDestinationOver
// Deprecated: as of v2.5. Use BlendSourceIn instead.
CompositeModeSourceIn
// Deprecated: as of v2.5. Use BlendDestinationIn instead.
CompositeModeDestinationIn
// Deprecated: as of v2.5. Use BlendSourceOut instead.
CompositeModeSourceOut
// Deprecated: as of v2.5. Use BlendDestinationOut instead.
CompositeModeDestinationOut
// Deprecated: as of v2.5. Use BlendSourceAtop instead.
CompositeModeSourceAtop
// Deprecated: as of v2.5. Use BlendDestinationAtop instead.
CompositeModeDestinationAtop
// Deprecated: as of v2.5. Use BlendXor instead.
CompositeModeXor
// Deprecated: as of v2.5. Use BlendLighter instead.
CompositeModeLighter
// Deprecated: as of v2.5. Use Blend with BlendFactorDestinationColor and BlendFactorZero instead.
CompositeModeMultiply
)
func (c CompositeMode) blend() Blend {
switch c {
case CompositeModeSourceOver:
return BlendSourceOver
case CompositeModeClear:
return BlendClear
case CompositeModeCopy:
return BlendCopy
case CompositeModeDestination:
return BlendDestination
case CompositeModeDestinationOver:
return BlendDestinationOver
case CompositeModeSourceIn:
return BlendSourceIn
case CompositeModeDestinationIn:
return BlendDestinationIn
case CompositeModeSourceOut:
return BlendSourceOut
case CompositeModeDestinationOut:
return BlendDestinationOut
case CompositeModeSourceAtop:
return BlendSourceAtop
case CompositeModeDestinationAtop:
return BlendDestinationAtop
case CompositeModeXor:
return BlendXor
case CompositeModeLighter:
return BlendLighter
case CompositeModeMultiply:
return Blend{
BlendFactorSourceRGB: BlendFactorDestinationColor,
BlendFactorSourceAlpha: BlendFactorDestinationColor,
BlendFactorDestinationRGB: BlendFactorZero,
BlendFactorDestinationAlpha: BlendFactorZero,
BlendOperationRGB: BlendOperationAdd,
BlendOperationAlpha: BlendOperationAdd,
}
default:
panic(fmt.Sprintf("ebiten: invalid composite mode: %d", c))
}
}