mirror of
https://github.com/hajimehoshi/ebiten.git
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68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package opengl
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// #cgo LDFLAGS: -framework OpenGL
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//
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// #include <OpenGL/gl.h>
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// #include <stdlib.h>
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import "C"
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import (
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"github.com/hajimehoshi/go-ebiten/graphics"
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"github.com/hajimehoshi/go-ebiten/graphics/matrix"
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"runtime"
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)
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type Device struct {
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screenScale int
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context *Context
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}
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func NewDevice(screenWidth, screenHeight, screenScale int) *Device {
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graphicsContext := newContext(screenWidth, screenHeight, screenScale)
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device := &Device{
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screenScale: screenScale,
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context: graphicsContext,
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}
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return device
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}
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func (device *Device) Init() {
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device.context.Init()
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}
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func (device *Device) Update(draw func(graphics.Context)) {
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context := device.context
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C.glEnable(C.GL_TEXTURE_2D)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_NEAREST)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_NEAREST)
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context.ResetOffscreen()
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context.Clear()
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draw(context)
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context.flush()
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MIN_FILTER, C.GL_LINEAR)
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C.glTexParameteri(C.GL_TEXTURE_2D, C.GL_TEXTURE_MAG_FILTER, C.GL_LINEAR)
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context.setMainFramebufferOffscreen()
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context.Clear()
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scale := float64(context.screenScale)
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geometryMatrix := matrix.Geometry{
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[2][3]float64{
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{scale, 0, 0},
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{0, scale, 0},
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},
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}
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context.DrawTexture(graphics.TextureID(context.screen.id),
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geometryMatrix, matrix.IdentityColor())
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context.flush()
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}
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func (device *Device) TextureFactory() graphics.TextureFactory {
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return device.context
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}
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func init() {
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runtime.LockOSThread()
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}
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