diff --git a/internal/graphics/opengl/context.go b/internal/graphics/opengl/context.go
index f32a28f29..b90bbb134 100644
--- a/internal/graphics/opengl/context.go
+++ b/internal/graphics/opengl/context.go
@@ -35,15 +35,16 @@ type Context struct {
 	oneMinusDstAlpha   operation
 	locationCache      *locationCache
 	lastFramebuffer    Framebuffer
+	lastViewportWidth  int
+	lastViewportHeight int
 	lastCompositeMode  CompositeMode
 	context
 }
 
-func (c *Context) bindFramebuffer(f Framebuffer) bool {
-	if c.lastFramebuffer != f {
-		c.bindFramebufferImpl(f)
-		c.lastFramebuffer = f
-		return true
+func (c *Context) bindFramebuffer(f Framebuffer) {
+	if c.lastFramebuffer == f {
+		return
 	}
-	return false
+	c.bindFramebufferImpl(f)
+	c.lastFramebuffer = f
 }
diff --git a/internal/graphics/opengl/context_desktop.go b/internal/graphics/opengl/context_desktop.go
index b87da67f6..2037c10c4 100644
--- a/internal/graphics/opengl/context_desktop.go
+++ b/internal/graphics/opengl/context_desktop.go
@@ -228,8 +228,11 @@ func (c *Context) NewFramebuffer(texture Texture) (Framebuffer, error) {
 
 func (c *Context) SetViewport(f Framebuffer, width, height int) error {
 	return c.RunOnContextThread(func() error {
-		if c.bindFramebuffer(f) {
+		c.bindFramebuffer(f)
+		if c.lastViewportWidth != width || c.lastViewportHeight != height {
 			gl.Viewport(0, 0, int32(width), int32(height))
+			c.lastViewportWidth = width
+			c.lastViewportHeight = height
 		}
 		return nil
 	})
diff --git a/internal/graphics/opengl/context_js.go b/internal/graphics/opengl/context_js.go
index 348720fd4..8576d9f94 100644
--- a/internal/graphics/opengl/context_js.go
+++ b/internal/graphics/opengl/context_js.go
@@ -205,9 +205,12 @@ func (c *Context) NewFramebuffer(t Texture) (Framebuffer, error) {
 }
 
 func (c *Context) SetViewport(f Framebuffer, width, height int) error {
-	if c.bindFramebuffer(f) {
+	c.bindFramebuffer(f)
+	if c.lastViewportWidth != width || c.lastViewportHeight != height {
 		gl := c.gl
 		gl.Viewport(0, 0, width, height)
+		c.lastViewportWidth = width
+		c.lastViewportHeight = height
 	}
 	return nil
 }
diff --git a/internal/graphics/opengl/context_mobile.go b/internal/graphics/opengl/context_mobile.go
index 04f9ba39a..e6e43a041 100644
--- a/internal/graphics/opengl/context_mobile.go
+++ b/internal/graphics/opengl/context_mobile.go
@@ -182,9 +182,12 @@ func (c *Context) NewFramebuffer(texture Texture) (Framebuffer, error) {
 }
 
 func (c *Context) SetViewport(f Framebuffer, width, height int) error {
-	if c.bindFramebuffer(f) {
+	c.bindFramebuffer(f)
+	if c.lastViewportWidth != width || c.lastViewportHeight != height {
 		gl := c.gl
 		gl.Viewport(0, 0, width, height)
+		c.lastViewportWidth = width
+		c.lastViewportHeight = height
 	}
 	return nil
 }
@@ -203,6 +206,8 @@ func (c *Context) DeleteFramebuffer(f Framebuffer) {
 	// https://www.khronos.org/opengles/sdk/docs/man/xhtml/glDeleteFramebuffers.xml
 	if c.lastFramebuffer == f {
 		c.lastFramebuffer = ZeroFramebuffer
+		c.lastViewportWidth = 0
+		c.lastViewportHeight = 0
 	}
 	gl.DeleteFramebuffer(mgl.Framebuffer(f))
 }