mirror of
https://github.com/hajimehoshi/ebiten.git
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58 lines
2.5 KiB
Go
58 lines
2.5 KiB
Go
// Copyright 2014 Hajime Hoshi
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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 ebiten
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import (
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"github.com/hajimehoshi/ebiten/internal/graphics/opengl"
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)
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// Filter represents the type of filter to be used when an image is maginified or minified.
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type Filter int
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const (
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FilterNearest Filter = iota // nearest (crisp-edged) filter
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FilterLinear // linear filter
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)
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func glFilter(c *opengl.Context, filter Filter) opengl.Filter {
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switch filter {
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case FilterNearest:
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return c.Nearest
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case FilterLinear:
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return c.Linear
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}
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panic("not reach")
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}
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// CompositionMode represents Porter-Duff composition mode.
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type CompositionMode int
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// Note: This name convention follow CSS compositing: https://drafts.fxtf.org/compositing-2/
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const (
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CompositionModeSourceOver CompositionMode = CompositionMode(opengl.CompositionModeSourceOver) // regular alpha blending
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CompositionModeClear = CompositionMode(opengl.CompositionModeClear)
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CompositionModeCopy = CompositionMode(opengl.CompositionModeCopy)
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CompositionModeDestination = CompositionMode(opengl.CompositionModeDestination)
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CompositionModeSourceIn = CompositionMode(opengl.CompositionModeSourceIn)
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CompositionModeDestinationIn = CompositionMode(opengl.CompositionModeDestinationIn)
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CompositionModeSourceOut = CompositionMode(opengl.CompositionModeSourceOut)
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CompositionModeDestinationOut = CompositionMode(opengl.CompositionModeDestinationOut)
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CompositionModeSourceAtop = CompositionMode(opengl.CompositionModeSourceAtop)
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CompositionModeDestinationAtop = CompositionMode(opengl.CompositionModeDestinationAtop)
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CompositionModeXor = CompositionMode(opengl.CompositionModeXor)
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CompositionModeLighter = CompositionMode(opengl.CompositionModeLighter) // sum of source and destination (a.k.a. 'plus' or 'additive')
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)
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