mirror of
https://github.com/hajimehoshi/ebiten.git
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46 lines
1.0 KiB
Go
46 lines
1.0 KiB
Go
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/*
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Copyright 2014 Hajime Hoshi
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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package opengl
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import (
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"github.com/go-gl/gl"
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)
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type Filter int
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const (
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FilterNearest Filter = gl.NEAREST
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FilterLinear = gl.LINEAR
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)
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func Init() {
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gl.Init()
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gl.Enable(gl.TEXTURE_2D)
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// Textures' pixel formats are alpha premultiplied.
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gl.Enable(gl.BLEND)
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gl.BlendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA)
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}
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func Clear(r, g, b, a float64) {
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gl.ClearColor(gl.GLclampf(r), gl.GLclampf(g), gl.GLclampf(b), gl.GLclampf(a))
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gl.Clear(gl.COLOR_BUFFER_BIT)
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}
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func Flush() {
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gl.Flush()
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}
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