diff --git a/cmd/go.mod b/cmd/go.mod
index f8e71ac7..52987fc0 100644
--- a/cmd/go.mod
+++ b/cmd/go.mod
@@ -3,7 +3,7 @@ module gioui.org/cmd
 go 1.13
 
 require (
-	gioui.org v0.0.0-20200210172258-ef9459c7fde2
+	gioui.org v0.0.0-20200227204135-e03b3cd808b4
 	github.com/chromedp/cdproto v0.0.0-20191114225735-6626966fbae4
 	github.com/chromedp/chromedp v0.5.2
 	golang.org/x/image v0.0.0-20190802002840-cff245a6509b
diff --git a/cmd/go.sum b/cmd/go.sum
index 3f780346..2581edbe 100644
--- a/cmd/go.sum
+++ b/cmd/go.sum
@@ -1,6 +1,6 @@
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-gioui.org v0.0.0-20200210172258-ef9459c7fde2 h1:eEXOqOxjMcIxGs6KbEWdu+Dj9lHgvoloeUDj/8Sf6t4=
-gioui.org v0.0.0-20200210172258-ef9459c7fde2/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
+gioui.org v0.0.0-20200227204135-e03b3cd808b4 h1:d/3ahOXn5Buwcg7Zec3lvLmfd0Ww+rVukfJKfRoYAgA=
+gioui.org v0.0.0-20200227204135-e03b3cd808b4/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802 h1:1BDTz0u9nC3//pOCMdNH+CiXJVYJh5UQNCOBG7jbELc=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/chromedp/cdproto v0.0.0-20191114225735-6626966fbae4 h1:QD3KxSJ59L2lxG6MXBjNHxiQO2RmxTQ3XcK+wO44WOg=
diff --git a/example/glfw/main.go b/example/glfw/main.go
index b806a697..a778a9d1 100644
--- a/example/glfw/main.go
+++ b/example/glfw/main.go
@@ -177,10 +177,18 @@ func (f *goglFunctions) BindBuffer(target giogl.Enum, b giogl.Buffer) {
 	gl.BindBuffer(uint32(target), uint32(b.V))
 }
 
+func (f *goglFunctions) BindBufferBase(target giogl.Enum, index int, b giogl.Buffer) {
+	gl.BindBufferBase(uint32(target), uint32(index), uint32(b.V))
+}
+
 func (f *goglFunctions) BindFramebuffer(target giogl.Enum, fb giogl.Framebuffer) {
 	gl.BindFramebuffer(uint32(target), uint32(fb.V))
 }
 
+func (f *goglFunctions) BindRenderbuffer(target giogl.Enum, rb giogl.Renderbuffer) {
+	gl.BindRenderbuffer(uint32(target), uint32(rb.V))
+}
+
 func (f *goglFunctions) BindTexture(target giogl.Enum, t giogl.Texture) {
 	gl.BindTexture(uint32(target), uint32(t.V))
 }
@@ -239,6 +247,12 @@ func (f *goglFunctions) CreateQuery() giogl.Query {
 	return giogl.Query{uint(q)}
 }
 
+func (f *goglFunctions) CreateRenderbuffer() giogl.Renderbuffer {
+	var rb uint32
+	gl.GenRenderbuffers(1, &rb)
+	return giogl.Renderbuffer{uint(rb)}
+}
+
 func (f *goglFunctions) CreateShader(ty giogl.Enum) giogl.Shader {
 	return giogl.Shader{uint(gl.CreateShader(uint32(ty)))}
 }
@@ -268,6 +282,11 @@ func (f *goglFunctions) DeleteQuery(query giogl.Query) {
 	gl.DeleteQueries(1, &q)
 }
 
+func (f *goglFunctions) DeleteRenderbuffer(rb giogl.Renderbuffer) {
+	r := uint32(rb.V)
+	gl.DeleteRenderbuffers(1, &r)
+}
+
 func (f *goglFunctions) DeleteShader(s giogl.Shader) {
 	gl.DeleteShader(uint32(s.V))
 }
@@ -384,6 +403,10 @@ func (f *goglFunctions) GetString(pname giogl.Enum) string {
 	}
 }
 
+func (f *goglFunctions) GetUniformBlockIndex(p giogl.Program, name string) uint {
+	return uint(gl.GetUniformBlockIndex(uint32(p.V), gl.Str(name+"\x00")))
+}
+
 func (f *goglFunctions) GetUniformLocation(p giogl.Program, name string) giogl.Uniform {
 	return giogl.Uniform{int(gl.GetUniformLocation(uint32(p.V), gl.Str(name+"\x00")))}
 }
@@ -396,6 +419,14 @@ func (f *goglFunctions) LinkProgram(p giogl.Program) {
 	gl.LinkProgram(uint32(p.V))
 }
 
+func (f *goglFunctions) ReadPixels(x, y, width, height int, format, ty giogl.Enum, data []byte) {
+	gl.ReadPixels(int32(x), int32(y), int32(width), int32(height), uint32(format), uint32(ty), unsafe.Pointer(&data[0]))
+}
+
+func (f *goglFunctions) RenderbufferStorage(target, internalformat giogl.Enum, width, height int) {
+	gl.RenderbufferStorage(uint32(target), uint32(internalformat), int32(width), int32(height))
+}
+
 func (f *goglFunctions) ShaderSource(s giogl.Shader, src string) {
 	csources, free := gl.Strs(src + "\x00")
 	gl.ShaderSource(uint32(s.V), 1, csources, nil)
@@ -418,6 +449,10 @@ func (f *goglFunctions) Uniform1f(dst giogl.Uniform, v float32) {
 	gl.Uniform1f(int32(dst.V), v)
 }
 
+func (f *goglFunctions) UniformBlockBinding(p giogl.Program, uniformBlockIndex uint, uniformBlockBinding uint) {
+	gl.UniformBlockBinding(uint32(p.V), uint32(uniformBlockIndex), uint32(uniformBlockBinding))
+}
+
 func (f *goglFunctions) Uniform1i(dst giogl.Uniform, v int) {
 	gl.Uniform1i(int32(dst.V), int32(v))
 }
diff --git a/example/go.mod b/example/go.mod
index 39717538..5521dfc0 100644
--- a/example/go.mod
+++ b/example/go.mod
@@ -3,7 +3,7 @@ module gioui.org/example
 go 1.13
 
 require (
-	gioui.org v0.0.0-20200211143819-6945a9062b9f
+	gioui.org v0.0.0-20200227204135-e03b3cd808b4
 	github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7
 	github.com/go-gl/glfw/v3.3/glfw v0.0.0-20191125211704-12ad95a8df72
 	github.com/google/go-github/v24 v24.0.1
diff --git a/example/go.sum b/example/go.sum
index e8472911..1a7ff955 100644
--- a/example/go.sum
+++ b/example/go.sum
@@ -1,7 +1,7 @@
 cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-gioui.org v0.0.0-20200211143819-6945a9062b9f h1:AXCwmxEaJTNKhDUW0htDUdLtaGxq6r/PH/cCe7chuuM=
-gioui.org v0.0.0-20200211143819-6945a9062b9f/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
+gioui.org v0.0.0-20200227204135-e03b3cd808b4 h1:d/3ahOXn5Buwcg7Zec3lvLmfd0Ww+rVukfJKfRoYAgA=
+gioui.org v0.0.0-20200227204135-e03b3cd808b4/go.mod h1:AHI9rFr6AEEHCb8EPVtb/p5M+NMJRKH58IOp8O3Je04=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7 h1:SCYMcCJ89LjRGwEa0tRluNRiMjZHalQZrVrvTbPh+qw=
 github.com/go-gl/gl v0.0.0-20190320180904-bf2b1f2f34d7/go.mod h1:482civXOzJJCPzJ4ZOX/pwvXBWSnzD4OKMdH4ClKGbk=