opengl: Remove FillFramebuffer

Fixes #536

internal/opengl/context.go

@@ -23,20 +23,6 @@ var (
 	oneMinus = math.Nextafter32(1, 0)
 )
 
-// adjustForClearColor adjust the value x for glClearColor function.
-//
-// On some machines like MacBook Pro, exact 0 and exact 1 might cause problems
-// at glClearColor() (#452).
-func adjustForClearColor(x float32) float32 {
-	if x <= 0 {
-		return zeroPlus
-	}
-	if x >= 1 {
-		return oneMinus
-	}
-	return x
-}
-
 var (
 	VertexShader       ShaderType
 	FragmentShader     ShaderType

internal/opengl/context_desktop.go

@@ -270,17 +270,6 @@ func (c *Context) setViewportImpl(width, height int) {
 	})
 }
 
-func (c *Context) FillFramebuffer(r, g, b, a float32) error {
-	return c.runOnContextThread(func() error {
-		gl.ClearColor(adjustForClearColor(r),
-			adjustForClearColor(g),
-			adjustForClearColor(b),
-			adjustForClearColor(a))
-		gl.Clear(gl.COLOR_BUFFER_BIT)
-		return nil
-	})
-}
-
 func (c *Context) DeleteFramebuffer(f Framebuffer) {
 	_ = c.runOnContextThread(func() error {
 		ff := uint32(f)

internal/opengl/context_js.go

@@ -218,17 +218,6 @@ func (c *Context) setViewportImpl(width, height int) {
 	gl.Viewport(0, 0, width, height)
 }
 
-func (c *Context) FillFramebuffer(r, g, b, a float32) error {
-	// TODO: Use f?
-	gl := c.gl
-	gl.ClearColor(adjustForClearColor(r),
-		adjustForClearColor(g),
-		adjustForClearColor(b),
-		adjustForClearColor(a))
-	gl.Clear(gl.COLOR_BUFFER_BIT)
-	return nil
-}
-
 func (c *Context) DeleteFramebuffer(f Framebuffer) {
 	gl := c.gl
 	if !gl.IsFramebuffer(f.(*js.Object)) {

internal/opengl/context_mobile.go

@@ -211,16 +211,6 @@ func (c *Context) setViewportImpl(width, height int) {
 	gl.Viewport(0, 0, width, height)
 }
 
-func (c *Context) FillFramebuffer(r, g, b, a float32) error {
-	gl := c.gl
-	gl.ClearColor(adjustForClearColor(r),
-		adjustForClearColor(g),
-		adjustForClearColor(b),
-		adjustForClearColor(a))
-	gl.Clear(mgl.COLOR_BUFFER_BIT)
-	return nil
-}
-
 func (c *Context) DeleteFramebuffer(f Framebuffer) {
 	gl := c.gl
 	if !gl.IsFramebuffer(mgl.Framebuffer(f)) {