ebiten/graphics/opengl/device.go
2013-10-12 22:33:55 +09:00

68 lines
1.5 KiB
Go

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