From b579bd7fd0993746f63bbb1e5e2fc19246a93018 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 7 Apr 2019 10:08:08 +0900
Subject: [PATCH] graphics: Remove GraphicsContext.Invalidated

---
 graphicscontext.go | 10 ----------
 internal/ui/ui.go  |  1 -
 2 files changed, 11 deletions(-)

diff --git a/graphicscontext.go b/graphicscontext.go
index 7aebec8fb..f2d703ab5 100644
--- a/graphicscontext.go
+++ b/graphicscontext.go
@@ -45,19 +45,10 @@ type graphicsContext struct {
 	screenHeight int
 	screenScale  float64
 	initialized  bool
-	invalidated  bool // browser only
 	offsetX      float64
 	offsetY      float64
 }
 
-func (c *graphicsContext) Invalidate() {
-	// Note that this is called only on browsers so far.
-	// TODO: On mobiles, this function is not called and instead IsTexture is called
-	// to detect if the context is lost. This is simple but might not work on some platforms.
-	// Should Invalidate be called explicitly?
-	c.invalidated = true
-}
-
 func (c *graphicsContext) SetSize(screenWidth, screenHeight int, screenScale float64) {
 	c.screenScale = screenScale
 
@@ -180,6 +171,5 @@ func (c *graphicsContext) restoreIfNeeded() error {
 	if err := shareable.Restore(); err != nil {
 		return err
 	}
-	c.invalidated = false
 	return nil
 }
diff --git a/internal/ui/ui.go b/internal/ui/ui.go
index 558b2609e..8c6549aa7 100644
--- a/internal/ui/ui.go
+++ b/internal/ui/ui.go
@@ -21,7 +21,6 @@ import (
 type GraphicsContext interface {
 	SetSize(width, height int, scale float64)
 	Update(afterFrameUpdate func()) error
-	Invalidate()
 }
 
 // RegularTermination represents a regular termination.