diff --git a/canvas.go b/canvas.go
index 897ff46..e5b7d74 100644
--- a/canvas.go
+++ b/canvas.go
@@ -519,71 +519,6 @@ func (cv *Canvas) backendFillStyle(s *drawStyle, alpha float64) backendbase.Fill
 	return stl
 }
 
-func (cv *Canvas) useShader(style *drawStyle) (vertexLoc uint32) {
-	if lg := style.linearGradient; lg != nil {
-		lg.load()
-		// 	gli.ActiveTexture(gl_TEXTURE0)
-		// 	gli.BindTexture(gl_TEXTURE_2D, lg.tex)
-		// 	gli.UseProgram(lgr.id)
-		// 	from := cv.tf(lg.from)
-		// 	to := cv.tf(lg.to)
-		// 	dir := to.sub(from)
-		// 	length := dir.len()
-		// 	dir = dir.divf(length)
-		// 	gli.Uniform2f(lgr.canvasSize, float32(cv.fw), float32(cv.fh))
-		// 	inv := cv.state.transform.invert().f32()
-		// 	gli.UniformMatrix3fv(lgr.invmat, 1, false, &inv[0])
-		// 	gli.Uniform2f(lgr.from, float32(from[0]), float32(from[1]))
-		// 	gli.Uniform2f(lgr.dir, float32(dir[0]), float32(dir[1]))
-		// 	gli.Uniform1f(lgr.len, float32(length))
-		// 	gli.Uniform1i(lgr.gradient, 0)
-		// 	gli.Uniform1f(lgr.globalAlpha, float32(cv.state.globalAlpha))
-		// 	return lgr.vertex
-	}
-	if rg := style.radialGradient; rg != nil {
-		rg.load()
-		// 	gli.ActiveTexture(gl_TEXTURE0)
-		// 	gli.BindTexture(gl_TEXTURE_2D, rg.tex)
-		// 	gli.UseProgram(rgr.id)
-		// 	from := cv.tf(rg.from)
-		// 	to := cv.tf(rg.to)
-		// 	dir := to.sub(from)
-		// 	length := dir.len()
-		// 	dir = dir.divf(length)
-		// 	gli.Uniform2f(rgr.canvasSize, float32(cv.fw), float32(cv.fh))
-		// 	inv := cv.state.transform.invert().f32()
-		// 	gli.UniformMatrix3fv(rgr.invmat, 1, false, &inv[0])
-		// 	gli.Uniform2f(rgr.from, float32(from[0]), float32(from[1]))
-		// 	gli.Uniform2f(rgr.to, float32(to[0]), float32(to[1]))
-		// 	gli.Uniform2f(rgr.dir, float32(dir[0]), float32(dir[1]))
-		// 	gli.Uniform1f(rgr.radFrom, float32(rg.radFrom))
-		// 	gli.Uniform1f(rgr.radTo, float32(rg.radTo))
-		// 	gli.Uniform1f(rgr.len, float32(length))
-		// 	gli.Uniform1i(rgr.gradient, 0)
-		// 	gli.Uniform1f(rgr.globalAlpha, float32(cv.state.globalAlpha))
-		// 	return rgr.vertex
-	}
-	// if img := style.image; img != nil {
-	// 	gli.UseProgram(ipr.id)
-	// 	gli.ActiveTexture(gl_TEXTURE0)
-	// 	gli.BindTexture(gl_TEXTURE_2D, img.tex)
-	// 	gli.Uniform2f(ipr.canvasSize, float32(cv.fw), float32(cv.fh))
-	// 	inv := cv.state.transform.invert().f32()
-	// 	gli.UniformMatrix3fv(ipr.invmat, 1, false, &inv[0])
-	// 	gli.Uniform2f(ipr.imageSize, float32(img.w), float32(img.h))
-	// 	gli.Uniform1i(ipr.image, 0)
-	// 	gli.Uniform1f(ipr.globalAlpha, float32(cv.state.globalAlpha))
-	// 	return ipr.vertex
-	// }
-
-	gli.UseProgram(sr.id)
-	gli.Uniform2f(sr.canvasSize, float32(cv.fw), float32(cv.fh))
-	c := colorGoToGL(style.color)
-	gli.Uniform4f(sr.color, float32(c.r), float32(c.g), float32(c.b), float32(c.a))
-	gli.Uniform1f(sr.globalAlpha, float32(cv.state.globalAlpha))
-	return sr.vertex
-}
-
 func (cv *Canvas) useAlphaShader(style *drawStyle, alphaTexSlot int32) (vertexLoc, alphaTexCoordLoc uint32) {
 	if lg := style.linearGradient; lg != nil {
 		lg.load()
diff --git a/shadows.go b/shadows.go
index 7f6c6b2..945b2d8 100644
--- a/shadows.go
+++ b/shadows.go
@@ -32,67 +32,6 @@ func (cv *Canvas) drawShadow2(pts [][2]float64) {
 	cv.b.Fill(&style, cv.shadowBuf)
 }
 
-func (cv *Canvas) drawShadow(tris []float32) {
-	if len(tris) == 0 || cv.state.shadowColor.A == 0 {
-		return
-	}
-
-	if cv.state.shadowBlur > 0 {
-		offscr1.alpha = true
-		cv.enableTextureRenderTarget(&offscr1)
-		gli.ClearColor(0, 0, 0, 0)
-		gli.Clear(gl_COLOR_BUFFER_BIT | gl_STENCIL_BUFFER_BIT)
-	}
-
-	ox, oy := float32(cv.state.shadowOffsetX), float32(cv.state.shadowOffsetY)
-
-	count := len(tris)
-	for i := 12; i < count; i += 2 {
-		tris[i] += ox
-		tris[i+1] += oy
-	}
-
-	gli.BindBuffer(gl_ARRAY_BUFFER, shadowBuf)
-	gli.BufferData(gl_ARRAY_BUFFER, len(tris)*4, unsafe.Pointer(&tris[0]), gl_STREAM_DRAW)
-
-	gli.ColorMask(false, false, false, false)
-	gli.StencilFunc(gl_ALWAYS, 1, 0xFF)
-	gli.StencilOp(gl_REPLACE, gl_REPLACE, gl_REPLACE)
-	gli.StencilMask(0x01)
-
-	gli.UseProgram(sr.id)
-	gli.Uniform4f(sr.color, 0, 0, 0, 0)
-	gli.Uniform2f(sr.canvasSize, float32(cv.fw), float32(cv.fh))
-
-	gli.EnableVertexAttribArray(sr.vertex)
-	gli.VertexAttribPointer(sr.vertex, 2, gl_FLOAT, false, 0, 0)
-	gli.DrawArrays(gl_TRIANGLES, 6, int32(len(tris)/2-6))
-	gli.DisableVertexAttribArray(sr.vertex)
-
-	gli.ColorMask(true, true, true, true)
-
-	gli.StencilFunc(gl_EQUAL, 1, 0xFF)
-
-	var style drawStyle
-	style.color = cv.state.shadowColor
-
-	vertex := cv.useShader(&style)
-	gli.EnableVertexAttribArray(vertex)
-	gli.VertexAttribPointer(vertex, 2, gl_FLOAT, false, 0, 0)
-	gli.DrawArrays(gl_TRIANGLES, 0, 6)
-	gli.DisableVertexAttribArray(vertex)
-
-	gli.StencilOp(gl_KEEP, gl_KEEP, gl_KEEP)
-	gli.StencilFunc(gl_ALWAYS, 0, 0xFF)
-
-	gli.Clear(gl_STENCIL_BUFFER_BIT)
-	gli.StencilMask(0xFF)
-
-	if cv.state.shadowBlur > 0 {
-		cv.drawBlurredShadow()
-	}
-}
-
 func (cv *Canvas) drawTextShadow(offset image.Point, strWidth, strHeight int, x, y float64) {
 	if cv.state.shadowColor.A == 0 {
 		return