From fc125eb5316e9745ba5800435708de768bdf12f1 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sat, 16 Sep 2017 15:49:29 +0900
Subject: [PATCH] graphics: Add comments

---
 image.go                     | 1 +
 internal/graphics/command.go | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/image.go b/image.go
index ab54c44d9..219b0b5f6 100644
--- a/image.go
+++ b/image.go
@@ -281,6 +281,7 @@ func newImageWithScreenFramebuffer(width, height int, offsetX, offsetY float64)
 	return i
 }
 
+// MaxImageSize represents the maximum width/height of an image.
 const MaxImageSize = restorable.MaxImageSize
 
 func checkSize(width, height int) {
diff --git a/internal/graphics/command.go b/internal/graphics/command.go
index 0717e1b7f..a1d297b06 100644
--- a/internal/graphics/command.go
+++ b/internal/graphics/command.go
@@ -37,6 +37,7 @@ type command interface {
 	Exec(indexOffsetInBytes int) error
 }
 
+// commandQueue is a command queue for drawing commands.
 type commandQueue struct {
 	commands    []command
 	vertices    []float32
@@ -44,6 +45,7 @@ type commandQueue struct {
 	m           sync.Mutex
 }
 
+// theCommandQueue is the command queue for the current process.
 var theCommandQueue = &commandQueue{}
 
 func (q *commandQueue) appendVertices(vertices []float32) {