diff --git a/internal/graphicscommand/command.go b/internal/graphicscommand/command.go
index 1f2187171..1aed45ad8 100644
--- a/internal/graphicscommand/command.go
+++ b/internal/graphicscommand/command.go
@@ -172,8 +172,7 @@ func (q *commandQueue) Flush() {
 			// Note that the vertices passed to BufferSubData is not under GC management
 			// in opengl package due to unsafe-way.
 			// See BufferSubData in context_mobile.go.
-			opengl.GetContext().ElementArrayBufferSubData(es[:ne])
-			opengl.GetContext().ArrayBufferSubData(vs[:nv])
+			opengl.BufferSubData(vs[:nv], es[:ne])
 			es = es[ne:]
 			vs = vs[nv:]
 		}
diff --git a/internal/opengl/context_desktop.go b/internal/opengl/context_desktop.go
index dc8f45169..78bd64b61 100644
--- a/internal/opengl/context_desktop.go
+++ b/internal/opengl/context_desktop.go
@@ -478,14 +478,14 @@ func (c *Context) bindBuffer(bufferType bufferType, b buffer) {
 	})
 }
 
-func (c *Context) ArrayBufferSubData(data []float32) {
+func (c *Context) arrayBufferSubData(data []float32) {
 	_ = c.runOnContextThread(func() error {
 		gl.BufferSubData(uint32(arrayBuffer), 0, len(data)*4, gl.Ptr(data))
 		return nil
 	})
 }
 
-func (c *Context) ElementArrayBufferSubData(data []uint16) {
+func (c *Context) elementArrayBufferSubData(data []uint16) {
 	_ = c.runOnContextThread(func() error {
 		gl.BufferSubData(uint32(elementArrayBuffer), 0, len(data)*2, gl.Ptr(data))
 		return nil
diff --git a/internal/opengl/context_js.go b/internal/opengl/context_js.go
index b73c21f46..077362c59 100644
--- a/internal/opengl/context_js.go
+++ b/internal/opengl/context_js.go
@@ -425,14 +425,14 @@ func (c *Context) bindBuffer(bufferType bufferType, b buffer) {
 	gl.Call("bindBuffer", int(bufferType), js.Value(b))
 }
 
-func (c *Context) ArrayBufferSubData(data []float32) {
+func (c *Context) arrayBufferSubData(data []float32) {
 	gl := c.gl
 	arr := js.TypedArrayOf(data)
 	gl.Call("bufferSubData", int(arrayBuffer), 0, arr)
 	arr.Release()
 }
 
-func (c *Context) ElementArrayBufferSubData(data []uint16) {
+func (c *Context) elementArrayBufferSubData(data []uint16) {
 	gl := c.gl
 	arr := js.TypedArrayOf(data)
 	gl.Call("bufferSubData", int(elementArrayBuffer), 0, arr)
diff --git a/internal/opengl/context_mobile.go b/internal/opengl/context_mobile.go
index 921f0eee4..251b7e7c0 100644
--- a/internal/opengl/context_mobile.go
+++ b/internal/opengl/context_mobile.go
@@ -374,12 +374,12 @@ func (c *Context) bindBuffer(bufferType bufferType, b buffer) {
 	gl.BindBuffer(mgl.Enum(bufferType), mgl.Buffer(b))
 }
 
-func (c *Context) ArrayBufferSubData(data []float32) {
+func (c *Context) arrayBufferSubData(data []float32) {
 	gl := c.gl
 	gl.BufferSubData(mgl.Enum(arrayBuffer), 0, float32sToBytes(data))
 }
 
-func (c *Context) ElementArrayBufferSubData(data []uint16) {
+func (c *Context) elementArrayBufferSubData(data []uint16) {
 	gl := c.gl
 	gl.BufferSubData(mgl.Enum(elementArrayBuffer), 0, uint16sToBytes(data))
 }
diff --git a/internal/opengl/program.go b/internal/opengl/program.go
index 30b19b8d7..e5a19202e 100644
--- a/internal/opengl/program.go
+++ b/internal/opengl/program.go
@@ -260,6 +260,12 @@ func areSameFloat32Array(a, b []float32) bool {
 	return true
 }
 
+func BufferSubData(vertices []float32, indices []uint16) {
+	c := GetContext()
+	c.arrayBufferSubData(vertices)
+	c.elementArrayBufferSubData(indices)
+}
+
 func UseProgram(proj []float32, texture Texture, dstW, dstH, srcW, srcH int, colorM *affine.ColorM, filter graphics.Filter) {
 	theOpenGLState.useProgram(proj, texture, dstW, dstH, srcW, srcH, colorM, filter)
 }