diff --git a/internal/opengl/context.go b/internal/opengl/context.go
index acadb55af..6a749edc1 100644
--- a/internal/opengl/context.go
+++ b/internal/opengl/context.go
@@ -96,7 +96,7 @@ func (c *Context) bindFramebuffer(f framebufferNative) {
 	c.lastFramebuffer = f
 }
 
-func (c *Context) setViewport(f *Framebuffer) {
+func (c *Context) setViewport(f *framebuffer) {
 	c.bindFramebuffer(f.native)
 	if c.lastViewportWidth != f.width || c.lastViewportHeight != f.height {
 		c.setViewportImpl(f.width, f.height)
diff --git a/internal/opengl/context_desktop.go b/internal/opengl/context_desktop.go
index d81eb2c3b..55a9d37c0 100644
--- a/internal/opengl/context_desktop.go
+++ b/internal/opengl/context_desktop.go
@@ -169,7 +169,7 @@ func (c *Context) bindFramebufferImpl(f framebufferNative) {
 	})
 }
 
-func (c *Context) framebufferPixels(f *Framebuffer, width, height int) ([]byte, error) {
+func (c *Context) framebufferPixels(f *framebuffer, width, height int) ([]byte, error) {
 	var pixels []byte
 	_ = c.runOnContextThread(func() error {
 		gl.Flush()
diff --git a/internal/opengl/context_js.go b/internal/opengl/context_js.go
index 4b7fc71f8..cf6864082 100644
--- a/internal/opengl/context_js.go
+++ b/internal/opengl/context_js.go
@@ -51,7 +51,7 @@ var (
 	clampToEdge         js.Value
 	colorAttachment0    js.Value
 	compileStatus       js.Value
-	framebuffer         js.Value
+	framebuffer_        js.Value
 	framebufferBinding  js.Value
 	framebufferComplete js.Value
 	linkStatus          js.Value
@@ -92,7 +92,7 @@ func init() {
 	clampToEdge = c.Get("CLAMP_TO_EDGE")
 	compileStatus = c.Get("COMPILE_STATUS")
 	colorAttachment0 = c.Get("COLOR_ATTACHMENT0")
-	framebuffer = c.Get("FRAMEBUFFER")
+	framebuffer_ = c.Get("FRAMEBUFFER")
 	framebufferBinding = c.Get("FRAMEBUFFER_BINDING")
 	framebufferComplete = c.Get("FRAMEBUFFER_COMPLETE")
 	linkStatus = c.Get("LINK_STATUS")
@@ -201,10 +201,10 @@ func (c *Context) newTexture(width, height int) (textureNative, error) {
 
 func (c *Context) bindFramebufferImpl(f framebufferNative) {
 	gl := c.gl
-	gl.Call("bindFramebuffer", framebuffer, js.Value(f))
+	gl.Call("bindFramebuffer", framebuffer_, js.Value(f))
 }
 
-func (c *Context) framebufferPixels(f *Framebuffer, width, height int) ([]byte, error) {
+func (c *Context) framebufferPixels(f *framebuffer, width, height int) ([]byte, error) {
 	gl := c.gl
 
 	c.bindFramebuffer(f.native)
@@ -257,8 +257,8 @@ func (c *Context) newFramebuffer(t textureNative) (framebufferNative, error) {
 	f := gl.Call("createFramebuffer")
 	c.bindFramebuffer(framebufferNative(f))
 
-	gl.Call("framebufferTexture2D", framebuffer, colorAttachment0, texture2d, js.Value(t), 0)
-	if s := gl.Call("checkFramebufferStatus", framebuffer); s.Int() != framebufferComplete.Int() {
+	gl.Call("framebufferTexture2D", framebuffer_, colorAttachment0, texture2d, js.Value(t), 0)
+	if s := gl.Call("checkFramebufferStatus", framebuffer_); s.Int() != framebufferComplete.Int() {
 		return framebufferNative(js.Null()), errors.New(fmt.Sprintf("opengl: creating framebuffer failed: %d", s.Int()))
 	}
 
diff --git a/internal/opengl/context_mobile.go b/internal/opengl/context_mobile.go
index 76b835735..f539dc888 100644
--- a/internal/opengl/context_mobile.go
+++ b/internal/opengl/context_mobile.go
@@ -156,7 +156,7 @@ func (c *Context) bindFramebufferImpl(f framebufferNative) {
 	gl.BindFramebuffer(mgl.FRAMEBUFFER, mgl.Framebuffer(f))
 }
 
-func (c *Context) framebufferPixels(f *Framebuffer, width, height int) ([]byte, error) {
+func (c *Context) framebufferPixels(f *framebuffer, width, height int) ([]byte, error) {
 	gl := c.gl
 	gl.Flush()
 
diff --git a/internal/opengl/framebuffer.go b/internal/opengl/framebuffer.go
index 1dda3718e..3b5d0195e 100644
--- a/internal/opengl/framebuffer.go
+++ b/internal/opengl/framebuffer.go
@@ -14,10 +14,8 @@
 
 package opengl
 
-// Framebuffer is a wrapper of OpenGL's framebuffer.
-//
-// TODO: Create a new struct Image and embed this struct.
-type Framebuffer struct {
+// framebuffer is a wrapper of OpenGL's framebuffer.
+type framebuffer struct {
 	native    framebufferNative
 	proMatrix []float32
 	width     int
@@ -25,12 +23,12 @@ type Framebuffer struct {
 }
 
 // newFramebufferFromTexture creates a framebuffer from the given texture.
-func newFramebufferFromTexture(texture textureNative, width, height int) (*Framebuffer, error) {
+func newFramebufferFromTexture(texture textureNative, width, height int) (*framebuffer, error) {
 	native, err := theContext.newFramebuffer(texture)
 	if err != nil {
 		return nil, err
 	}
-	return &Framebuffer{
+	return &framebuffer{
 		native: native,
 		width:  width,
 		height: height,
@@ -38,8 +36,8 @@ func newFramebufferFromTexture(texture textureNative, width, height int) (*Frame
 }
 
 // newScreenFramebuffer creates a framebuffer for the screen.
-func newScreenFramebuffer(width, height int) *Framebuffer {
-	return &Framebuffer{
+func newScreenFramebuffer(width, height int) *framebuffer {
+	return &framebuffer{
 		native: theContext.getScreenFramebuffer(),
 		width:  width,
 		height: height,
@@ -51,7 +49,7 @@ func newScreenFramebuffer(width, height int) *Framebuffer {
 // A projection matrix converts the coodinates on the framebuffer
 // (0, 0) - (viewport width, viewport height)
 // to the normalized device coodinates (-1, -1) - (1, 1) with adjustment.
-func (f *Framebuffer) projectionMatrix() []float32 {
+func (f *framebuffer) projectionMatrix() []float32 {
 	if f.proMatrix != nil {
 		return f.proMatrix
 	}
@@ -59,7 +57,7 @@ func (f *Framebuffer) projectionMatrix() []float32 {
 	return f.proMatrix
 }
 
-func (f *Framebuffer) delete() {
+func (f *framebuffer) delete() {
 	if f.native != theContext.getScreenFramebuffer() {
 		theContext.deleteFramebuffer(f.native)
 	}
diff --git a/internal/opengl/image.go b/internal/opengl/image.go
index 73526549f..bb3e22eeb 100644
--- a/internal/opengl/image.go
+++ b/internal/opengl/image.go
@@ -38,7 +38,7 @@ func checkSize(width, height int) {
 
 type Image struct {
 	textureNative textureNative
-	Framebuffer   *Framebuffer
+	Framebuffer   *framebuffer
 	width         int
 	height        int
 }