From cc2174bd698b08f3c5071d8785b18fb2654372a6 Mon Sep 17 00:00:00 2001
From: Hajime Hoshi <hajimehoshi@gmail.com>
Date: Sun, 11 Nov 2018 23:57:23 +0900
Subject: [PATCH] graphicsdriver: Adjust API

---
 internal/graphicscommand/command.go       | 5 +++--
 internal/graphicsdriver/graphicsdriver.go | 2 +-
 internal/graphicsdriver/opengl/driver.go  | 4 ++--
 3 files changed, 6 insertions(+), 5 deletions(-)

diff --git a/internal/graphicscommand/command.go b/internal/graphicscommand/command.go
index aeaa975d5..697e59624 100644
--- a/internal/graphicscommand/command.go
+++ b/internal/graphicscommand/command.go
@@ -433,8 +433,9 @@ func (c *newScreenFramebufferImageCommand) String() string {
 
 // Exec executes a newScreenFramebufferImageCommand.
 func (c *newScreenFramebufferImageCommand) Exec(indexOffset int) error {
-	c.result.image = driver().NewScreenFramebufferImage(c.width, c.height)
-	return nil
+	var err error
+	c.result.image, err = driver().NewScreenFramebufferImage(c.width, c.height)
+	return err
 }
 
 func (c *newScreenFramebufferImageCommand) NumVertices() int {
diff --git a/internal/graphicsdriver/graphicsdriver.go b/internal/graphicsdriver/graphicsdriver.go
index d537c0f59..4d406e57b 100644
--- a/internal/graphicsdriver/graphicsdriver.go
+++ b/internal/graphicsdriver/graphicsdriver.go
@@ -24,7 +24,7 @@ type GraphicsDriver interface {
 	Flush()
 	MaxImageSize() int
 	NewImage(width, height int) (Image, error)
-	NewScreenFramebufferImage(width, height int) Image
+	NewScreenFramebufferImage(width, height int) (Image, error)
 	Reset() error
 	Draw(indexLen int, indexOffset int, mode graphics.CompositeMode, colorM *affine.ColorM, filter graphics.Filter) error
 }
diff --git a/internal/graphicsdriver/opengl/driver.go b/internal/graphicsdriver/opengl/driver.go
index a58c640fc..dbb6e3a33 100644
--- a/internal/graphicsdriver/opengl/driver.go
+++ b/internal/graphicsdriver/opengl/driver.go
@@ -67,7 +67,7 @@ func (d *Driver) NewImage(width, height int) (graphicsdriver.Image, error) {
 	return i, nil
 }
 
-func (d *Driver) NewScreenFramebufferImage(width, height int) graphicsdriver.Image {
+func (d *Driver) NewScreenFramebufferImage(width, height int) (graphicsdriver.Image, error) {
 	d.checkSize(width, height)
 	i := &Image{
 		driver: d,
@@ -78,7 +78,7 @@ func (d *Driver) NewScreenFramebufferImage(width, height int) graphicsdriver.Ima
 	// On browsers, c.width and c.height are used as viewport size and
 	// Edge can't treat a bigger viewport than the drawing area (#71).
 	i.framebuffer = newScreenFramebuffer(&d.context, width, height)
-	return i
+	return i, nil
 }
 
 // Reset resets or initializes the current OpenGL state.