diff --git a/app/internal/gl/gl.go b/app/internal/gl/gl.go
index b86bb7b5..0c5239ba 100644
--- a/app/internal/gl/gl.go
+++ b/app/internal/gl/gl.go
@@ -7,15 +7,6 @@ type (
 	Enum   uint
 )
 
-type Context interface {
-	Functions() *Functions
-	Present() error
-	MakeCurrent() error
-	Release()
-	Lock()
-	Unlock()
-}
-
 const (
 	ARRAY_BUFFER                          = 0x8892
 	BLEND                                 = 0xbe2
diff --git a/app/internal/window/egl_android.go b/app/internal/window/egl_android.go
index f73cbfde..a1d3cbe5 100644
--- a/app/internal/window/egl_android.go
+++ b/app/internal/window/egl_android.go
@@ -11,7 +11,6 @@ import (
 	"unsafe"
 
 	"gioui.org/app/internal/egl"
-	"gioui.org/app/internal/gl"
 )
 
 type context struct {
@@ -19,7 +18,7 @@ type context struct {
 	*egl.Context
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	ctx, err := egl.NewContext(nil)
 	if err != nil {
 		return nil, err
diff --git a/app/internal/window/egl_wayland.go b/app/internal/window/egl_wayland.go
index 0768a15c..aed283ee 100644
--- a/app/internal/window/egl_wayland.go
+++ b/app/internal/window/egl_wayland.go
@@ -9,7 +9,6 @@ import (
 	"unsafe"
 
 	"gioui.org/app/internal/egl"
-	"gioui.org/app/internal/gl"
 )
 
 /*
@@ -27,7 +26,7 @@ type context struct {
 	eglWin *C.struct_wl_egl_window
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	disp := egl.NativeDisplayType(unsafe.Pointer(w.display()))
 	ctx, err := egl.NewContext(disp)
 	if err != nil {
diff --git a/app/internal/window/egl_windows.go b/app/internal/window/egl_windows.go
index d4ea94b4..38f88c5f 100644
--- a/app/internal/window/egl_windows.go
+++ b/app/internal/window/egl_windows.go
@@ -6,7 +6,6 @@ import (
 	"unsafe"
 
 	"gioui.org/app/internal/egl"
-	"gioui.org/app/internal/gl"
 )
 
 type context struct {
@@ -14,7 +13,7 @@ type context struct {
 	*egl.Context
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	disp := egl.NativeDisplayType(unsafe.Pointer(w.HDC()))
 	ctx, err := egl.NewContext(disp)
 	if err != nil {
diff --git a/app/internal/window/egl_x11.go b/app/internal/window/egl_x11.go
index ac2360f8..c644ffea 100644
--- a/app/internal/window/egl_x11.go
+++ b/app/internal/window/egl_x11.go
@@ -8,7 +8,6 @@ import (
 	"unsafe"
 
 	"gioui.org/app/internal/egl"
-	"gioui.org/app/internal/gl"
 )
 
 type x11Context struct {
@@ -16,7 +15,7 @@ type x11Context struct {
 	*egl.Context
 }
 
-func (w *x11Window) NewContext() (gl.Context, error) {
+func (w *x11Window) NewContext() (Context, error) {
 	disp := egl.NativeDisplayType(unsafe.Pointer(w.display()))
 	ctx, err := egl.NewContext(disp)
 	if err != nil {
diff --git a/app/internal/window/gl_ios.go b/app/internal/window/gl_ios.go
index c84de1d2..ef5c3b9b 100644
--- a/app/internal/window/gl_ios.go
+++ b/app/internal/window/gl_ios.go
@@ -121,6 +121,6 @@ func (c *context) MakeCurrent() error {
 	return nil
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	return newContext(w)
 }
diff --git a/app/internal/window/gl_js.go b/app/internal/window/gl_js.go
index 798ff4ae..45a47df5 100644
--- a/app/internal/window/gl_js.go
+++ b/app/internal/window/gl_js.go
@@ -90,6 +90,6 @@ func (c *context) MakeCurrent() error {
 	return nil
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	return newContext(w)
 }
diff --git a/app/internal/window/gl_macos.go b/app/internal/window/gl_macos.go
index 58194730..bf03befe 100644
--- a/app/internal/window/gl_macos.go
+++ b/app/internal/window/gl_macos.go
@@ -71,6 +71,6 @@ func (c *context) MakeCurrent() error {
 	return nil
 }
 
-func (w *window) NewContext() (gl.Context, error) {
+func (w *window) NewContext() (Context, error) {
 	return newContext(w)
 }
diff --git a/app/internal/window/window.go b/app/internal/window/window.go
index ab3321bb..5cca6bda 100644
--- a/app/internal/window/window.go
+++ b/app/internal/window/window.go
@@ -31,6 +31,15 @@ type Callbacks interface {
 	Event(e event.Event)
 }
 
+type Context interface {
+	Functions() *gl.Functions
+	Present() error
+	MakeCurrent() error
+	Release()
+	Lock()
+	Unlock()
+}
+
 // Driver is the interface for the platform implementation
 // of a window.
 type Driver interface {
@@ -39,7 +48,7 @@ type Driver interface {
 	SetAnimating(anim bool)
 	// ShowTextInput updates the virtual keyboard state.
 	ShowTextInput(show bool)
-	NewContext() (gl.Context, error)
+	NewContext() (Context, error)
 }
 
 type windowRendezvous struct {
diff --git a/app/loop.go b/app/loop.go
index 1dc81c05..175675a7 100644
--- a/app/loop.go
+++ b/app/loop.go
@@ -6,8 +6,8 @@ import (
 	"image"
 	"runtime"
 
-	"gioui.org/app/internal/gl"
 	"gioui.org/app/internal/gpu"
+	"gioui.org/app/internal/window"
 	"gioui.org/op"
 )
 
@@ -36,7 +36,7 @@ type frameResult struct {
 	err     error
 }
 
-func newLoop(ctx gl.Context) (*renderLoop, error) {
+func newLoop(ctx window.Context) (*renderLoop, error) {
 	l := &renderLoop{
 		frames:     make(chan frame),
 		results:    make(chan frameResult),
@@ -54,7 +54,7 @@ func newLoop(ctx gl.Context) (*renderLoop, error) {
 	return l, nil
 }
 
-func (l *renderLoop) renderLoop(glctx gl.Context) error {
+func (l *renderLoop) renderLoop(glctx window.Context) error {
 	// GL Operations must happen on a single OS thread, so
 	// pass initialization result through a channel.
 	initErr := make(chan error)
diff --git a/app/window.go b/app/window.go
index c5d173b4..751cee6e 100644
--- a/app/window.go
+++ b/app/window.go
@@ -8,7 +8,6 @@ import (
 	"image"
 	"time"
 
-	"gioui.org/app/internal/gl"
 	"gioui.org/app/internal/input"
 	"gioui.org/app/internal/window"
 	"gioui.org/io/event"
@@ -285,7 +284,7 @@ func (w *Window) run(opts *window.Options) {
 						w.loop = nil
 					}
 				} else {
-					var ctx gl.Context
+					var ctx window.Context
 					ctx, err = w.driver.NewContext()
 					if err == nil {
 						w.loop, err = newLoop(ctx)