From dc9f682863a51fa80603d23a4d529143fb03519b Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@hajimehoshi.com>
Date: Wed, 27 Nov 2013 11:56:44 +0900
Subject: [PATCH] Refactoring

---
 graphics/opengl/context.go | 25 +++++++------------------
 graphics/opengl/device.go  |  8 +++++---
 2 files changed, 12 insertions(+), 21 deletions(-)

diff --git a/graphics/opengl/context.go b/graphics/opengl/context.go
index 53027d17d..759b8fdcb 100644
--- a/graphics/opengl/context.go
+++ b/graphics/opengl/context.go
@@ -10,32 +10,25 @@ import (
 	"github.com/hajimehoshi/go-ebiten/graphics/matrix"
 	"github.com/hajimehoshi/go-ebiten/graphics/opengl/offscreen"
 	"github.com/hajimehoshi/go-ebiten/graphics/opengl/texture"
-	grendertarget "github.com/hajimehoshi/go-ebiten/graphics/rendertarget"
 	"image"
 	"math"
 )
 
 type Context struct {
-	screenId     graphics.RenderTargetId
-	screenWidth  int
-	screenHeight int
-	screenScale  int
-	ids          *ids
-	offscreen    *offscreen.Offscreen
+	screenId  graphics.RenderTargetId
+	ids       *ids
+	offscreen *offscreen.Offscreen
 }
 
 func newContext(screenWidth, screenHeight, screenScale int) *Context {
 	context := &Context{
-		screenWidth:  screenWidth,
-		screenHeight: screenHeight,
-		screenScale:  screenScale,
-		ids:          newIds(),
-		offscreen:    offscreen.New(screenWidth, screenHeight, screenScale),
+		ids:       newIds(),
+		offscreen: offscreen.New(screenWidth, screenHeight, screenScale),
 	}
 
 	var err error
 	context.screenId, err = context.createRenderTarget(
-		context.screenWidth, context.screenHeight, texture.FilterNearest)
+		screenWidth, screenHeight, texture.FilterNearest)
 	if err != nil {
 		panic("initializing the offscreen failed: " + err.Error())
 	}
@@ -88,11 +81,7 @@ func (context *Context) ResetOffscreen() {
 
 func (context *Context) SetOffscreen(renderTargetId graphics.RenderTargetId) {
 	renderTarget := context.ids.RenderTargetAt(renderTargetId)
-	context.setOffscreen(renderTarget)
-}
-
-func (context *Context) setOffscreen(rt *grendertarget.RenderTarget) {
-	context.offscreen.Set(rt)
+	context.offscreen.Set(renderTarget)
 }
 
 func (context *Context) setMainFramebufferOffscreen() {
diff --git a/graphics/opengl/device.go b/graphics/opengl/device.go
index 18ae8edf6..8f715184e 100644
--- a/graphics/opengl/device.go
+++ b/graphics/opengl/device.go
@@ -6,13 +6,15 @@ import (
 )
 
 type Device struct {
-	context *Context
+	context     *Context
+	screenScale int
 }
 
 func NewDevice(screenWidth, screenHeight, screenScale int) *Device {
 	context := newContext(screenWidth, screenHeight, screenScale)
 	return &Device{
-		context: context,
+		context:     context,
+		screenScale: screenScale,
 	}
 }
 
@@ -28,7 +30,7 @@ func (device *Device) Update(draw func(graphics.Context)) {
 	context.setMainFramebufferOffscreen()
 	context.Clear()
 
-	scale := float64(context.screenScale)
+	scale := float64(device.screenScale)
 	geometryMatrix := matrix.IdentityGeometry()
 	geometryMatrix.Scale(scale, scale)
 	context.DrawTexture(context.ToTexture(context.screenId),