From 37473d2f9f7da50e3917c211f78b1bb15c45be46 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 5 Jun 2016 03:26:00 +0900
Subject: [PATCH] graphics: Move a comment

---
 internal/graphics/command.go     | 4 ++--
 internal/graphics/framebuffer.go | 4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/internal/graphics/command.go b/internal/graphics/command.go
index 04f17cdad..f41aaf440 100644
--- a/internal/graphics/command.go
+++ b/internal/graphics/command.go
@@ -52,6 +52,8 @@ func (q *commandQueue) Flush(context *opengl.Context) error {
 	if 0 < len(vertices) {
 		context.BufferSubData(context.ArrayBuffer, vertices)
 	}
+	// NOTE: WebGL doesn't seem to have Check gl.MAX_ELEMENTS_VERTICES or gl.MAX_ELEMENTS_INDICES so far.
+	// Let's use them to compare to len(quads) in the future.
 	if MaxQuads < len(vertices)/16 {
 		return errors.New(fmt.Sprintf("len(quads) must be equal to or less than %d", MaxQuads))
 	}
@@ -97,8 +99,6 @@ func (c *drawImageCommand) Exec(context *opengl.Context) error {
 	}
 	context.BlendFunc(c.mode)
 
-	// NOTE: WebGL doesn't seem to have Check gl.MAX_ELEMENTS_VERTICES or gl.MAX_ELEMENTS_INDICES so far.
-	// Let's use them to compare to len(quads) in the future.
 	n := len(c.vertices) / 16
 	if n == 0 {
 		return nil
diff --git a/internal/graphics/framebuffer.go b/internal/graphics/framebuffer.go
index 20f77394e..d1393ecaf 100644
--- a/internal/graphics/framebuffer.go
+++ b/internal/graphics/framebuffer.go
@@ -116,7 +116,9 @@ func (f *Framebuffer) DrawTexture(context *opengl.Context, t *Texture, vertices
 	// Drawing a texture to the default buffer must be the last command.
 	// TODO(hajimehoshi): This seems a little hacky. Refactor.
 	if f.native == opengl.ZeroFramebuffer {
-		return theCommandQueue.Flush(context)
+		if err := theCommandQueue.Flush(context); err != nil {
+			return err
+		}
 	}
 	return nil
 }