diff --git a/ebitenutil/debugprint.go b/ebitenutil/debugprint.go
index 59aae90a6..604c3fcad 100644
--- a/ebitenutil/debugprint.go
+++ b/ebitenutil/debugprint.go
@@ -22,15 +22,10 @@ import (
 )
 
 var (
-	debugPrintTextImage     *ebiten.Image
+	debugPrintTextImage     = ebiten.NewImageFromImage(assets.CreateTextImage())
 	debugPrintTextSubImages = map[rune]*ebiten.Image{}
 )
 
-func init() {
-	img := assets.CreateTextImage()
-	debugPrintTextImage, _ = ebiten.NewImageFromImage(img)
-}
-
 // DebugPrint draws the string str on the image on left top corner.
 //
 // The available runes are in U+0000 to U+00FF, which is C0 Controls and Basic Latin and C1 Controls and Latin-1 Supplement.
diff --git a/ebitenutil/loadimage.go b/ebitenutil/loadimage.go
index 99ecd9bad..3f2f0648a 100644
--- a/ebitenutil/loadimage.go
+++ b/ebitenutil/loadimage.go
@@ -45,9 +45,6 @@ func NewImageFromFile(path string) (*ebiten.Image, image.Image, error) {
 	if err != nil {
 		return nil, nil, err
 	}
-	img2, err := ebiten.NewImageFromImage(img)
-	if err != nil {
-		return nil, nil, err
-	}
+	img2 := ebiten.NewImageFromImage(img)
 	return img2, img, err
 }
diff --git a/ebitenutil/url.go b/ebitenutil/url.go
index 57ce9f571..97980ed54 100644
--- a/ebitenutil/url.go
+++ b/ebitenutil/url.go
@@ -37,6 +37,6 @@ func NewImageFromURL(url string) (*ebiten.Image, error) {
 		return nil, err
 	}
 
-	eimg, _ := ebiten.NewImageFromImage(img)
+	eimg := ebiten.NewImageFromImage(img)
 	return eimg, nil
 }
diff --git a/examples/additive/main.go b/examples/additive/main.go
index 5e4491e78..372dcb098 100644
--- a/examples/additive/main.go
+++ b/examples/additive/main.go
@@ -82,7 +82,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Additive Blending (Ebiten Demo)")
diff --git a/examples/address/main.go b/examples/address/main.go
index 458004252..da264c62f 100644
--- a/examples/address/main.go
+++ b/examples/address/main.go
@@ -48,7 +48,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 }
 
 func drawRect(screen *ebiten.Image, img *ebiten.Image, x, y, width, height float32, address ebiten.Address, msg string) {
diff --git a/examples/airship/main.go b/examples/airship/main.go
index a0e85f678..351629f25 100644
--- a/examples/airship/main.go
+++ b/examples/airship/main.go
@@ -61,7 +61,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	const repeat = 5
 	w, h := gophersImage.Size()
@@ -89,7 +89,7 @@ func init() {
 			fogRGBA.SetRGBA(i, j, clr)
 		}
 	}
-	fogImage, _ = ebiten.NewImageFromImage(fogRGBA)
+	fogImage = ebiten.NewImageFromImage(fogRGBA)
 }
 
 // player represents the current airship's position.
diff --git a/examples/alphablending/main.go b/examples/alphablending/main.go
index c7bb1f203..981cbb2d4 100644
--- a/examples/alphablending/main.go
+++ b/examples/alphablending/main.go
@@ -91,7 +91,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Alpha Blending (Ebiten Demo)")
diff --git a/examples/animation/main.go b/examples/animation/main.go
index 4562acfc9..acf33abb3 100644
--- a/examples/animation/main.go
+++ b/examples/animation/main.go
@@ -77,7 +77,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	runnerImage, _ = ebiten.NewImageFromImage(img)
+	runnerImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Animation (Ebiten Demo)")
diff --git a/examples/audiopanning/main.go b/examples/audiopanning/main.go
index dc504f5f0..f9cd1d6e9 100644
--- a/examples/audiopanning/main.go
+++ b/examples/audiopanning/main.go
@@ -132,7 +132,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	img, _ = ebiten.NewImageFromImage(rawimg)
+	img = ebiten.NewImageFromImage(rawimg)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Audio Panning Loop (Ebiten Demo)")
diff --git a/examples/blocks/blocks/gamescene.go b/examples/blocks/blocks/gamescene.go
index 86bf2ddda..ad853546e 100644
--- a/examples/blocks/blocks/gamescene.go
+++ b/examples/blocks/blocks/gamescene.go
@@ -76,7 +76,7 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-	imageGameBG, _ = ebiten.NewImageFromImage(img)
+	imageGameBG = ebiten.NewImageFromImage(img)
 
 	// Windows: Field
 	x, y := fieldWindowPosition()
diff --git a/examples/blocks/blocks/piece.go b/examples/blocks/blocks/piece.go
index f202ed2b6..1019746c2 100644
--- a/examples/blocks/blocks/piece.go
+++ b/examples/blocks/blocks/piece.go
@@ -30,7 +30,7 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-	imageBlocks, _ = ebiten.NewImageFromImage(img)
+	imageBlocks = ebiten.NewImageFromImage(img)
 
 }
 
diff --git a/examples/blocks/blocks/titlescene.go b/examples/blocks/blocks/titlescene.go
index d39ea1752..d3d97c298 100644
--- a/examples/blocks/blocks/titlescene.go
+++ b/examples/blocks/blocks/titlescene.go
@@ -32,7 +32,7 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-	imageBackground, _ = ebiten.NewImageFromImage(img)
+	imageBackground = ebiten.NewImageFromImage(img)
 }
 
 type TitleScene struct {
diff --git a/examples/blur/main.go b/examples/blur/main.go
index 1d6112cb2..161f57c96 100644
--- a/examples/blur/main.go
+++ b/examples/blur/main.go
@@ -82,7 +82,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Blur (Ebiten Demo)")
diff --git a/examples/camera/main.go b/examples/camera/main.go
index 45f0a05b6..9cc5bebe2 100644
--- a/examples/camera/main.go
+++ b/examples/camera/main.go
@@ -65,7 +65,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	tilesImage, _ = ebiten.NewImageFromImage(img)
+	tilesImage = ebiten.NewImageFromImage(img)
 }
 
 type Camera struct {
diff --git a/examples/drag/main.go b/examples/drag/main.go
index 8a490305a..c779ebd53 100644
--- a/examples/drag/main.go
+++ b/examples/drag/main.go
@@ -203,7 +203,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 }
 
 func NewGame() *Game {
diff --git a/examples/filter/main.go b/examples/filter/main.go
index 9cda97078..8cd540a19 100644
--- a/examples/filter/main.go
+++ b/examples/filter/main.go
@@ -79,7 +79,7 @@ func main() {
 		log.Fatal(err)
 	}
 
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Filter (Ebiten Demo)")
diff --git a/examples/flappy/main.go b/examples/flappy/main.go
index 845ca3f34..ebe96f7c1 100644
--- a/examples/flappy/main.go
+++ b/examples/flappy/main.go
@@ -82,13 +82,13 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopherImage, _ = ebiten.NewImageFromImage(img)
+	gopherImage = ebiten.NewImageFromImage(img)
 
 	img, _, err = image.Decode(bytes.NewReader(resources.Tiles_png))
 	if err != nil {
 		log.Fatal(err)
 	}
-	tilesImage, _ = ebiten.NewImageFromImage(img)
+	tilesImage = ebiten.NewImageFromImage(img)
 }
 
 func init() {
diff --git a/examples/flood/main.go b/examples/flood/main.go
index f19558e27..916cf6aaf 100644
--- a/examples/flood/main.go
+++ b/examples/flood/main.go
@@ -103,7 +103,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	ebitenImage, _ = ebiten.NewImageFromImage(img)
+	ebitenImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Flood fill with solid colors (Ebiten Demo)")
diff --git a/examples/fullscreen/main.go b/examples/fullscreen/main.go
index f89e40443..28e86ac6c 100644
--- a/examples/fullscreen/main.go
+++ b/examples/fullscreen/main.go
@@ -55,7 +55,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 }
 
 func initFont() {
diff --git a/examples/hsv/main.go b/examples/hsv/main.go
index 81fb097bb..7c5ee3256 100644
--- a/examples/hsv/main.go
+++ b/examples/hsv/main.go
@@ -149,7 +149,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("HSV (Ebiten Demo)")
diff --git a/examples/hue/main.go b/examples/hue/main.go
index 270fe335d..ac372ddb9 100644
--- a/examples/hue/main.go
+++ b/examples/hue/main.go
@@ -75,7 +75,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Hue (Ebiten Demo)")
diff --git a/examples/infinitescroll/main.go b/examples/infinitescroll/main.go
index 2685ba668..efce8346c 100644
--- a/examples/infinitescroll/main.go
+++ b/examples/infinitescroll/main.go
@@ -51,7 +51,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	bgImage, _ = ebiten.NewImageFromImage(img)
+	bgImage = ebiten.NewImageFromImage(img)
 }
 
 type viewport struct {
diff --git a/examples/keyboard/main.go b/examples/keyboard/main.go
index 457c4ff32..a5c417714 100644
--- a/examples/keyboard/main.go
+++ b/examples/keyboard/main.go
@@ -42,7 +42,7 @@ func init() {
 		log.Fatal(err)
 	}
 
-	keyboardImage, _ = ebiten.NewImageFromImage(img)
+	keyboardImage = ebiten.NewImageFromImage(img)
 }
 
 type Game struct {
diff --git a/examples/mascot/main.go b/examples/mascot/main.go
index aa5477066..8ac84517f 100644
--- a/examples/mascot/main.go
+++ b/examples/mascot/main.go
@@ -55,19 +55,19 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopher1, _ = ebiten.NewImageFromImage(img1)
+	gopher1 = ebiten.NewImageFromImage(img1)
 
 	img2, _, err := image.Decode(bytes.NewReader(rmascot.Out02_png))
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopher2, _ = ebiten.NewImageFromImage(img2)
+	gopher2 = ebiten.NewImageFromImage(img2)
 
 	img3, _, err := image.Decode(bytes.NewReader(rmascot.Out03_png))
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopher3, _ = ebiten.NewImageFromImage(img3)
+	gopher3 = ebiten.NewImageFromImage(img3)
 }
 
 func init() {
diff --git a/examples/masking/main.go b/examples/masking/main.go
index b53c0c6f3..407ee0068 100644
--- a/examples/masking/main.go
+++ b/examples/masking/main.go
@@ -54,13 +54,13 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	bgImage, _ = ebiten.NewImageFromImage(img)
+	bgImage = ebiten.NewImageFromImage(img)
 
 	img, _, err = image.Decode(bytes.NewReader(images.FiveYears_jpg))
 	if err != nil {
 		log.Fatal(err)
 	}
-	fgImage, _ = ebiten.NewImageFromImage(img)
+	fgImage = ebiten.NewImageFromImage(img)
 
 	// Initialize the spot light image.
 	const r = 64
@@ -75,7 +75,7 @@ func init() {
 			a.SetAlpha(i, j, color.Alpha{b})
 		}
 	}
-	spotLightImage, _ = ebiten.NewImageFromImage(a)
+	spotLightImage = ebiten.NewImageFromImage(a)
 }
 
 type Game struct {
diff --git a/examples/minify/main.go b/examples/minify/main.go
index 799892a6f..8f071ada7 100644
--- a/examples/minify/main.go
+++ b/examples/minify/main.go
@@ -111,7 +111,7 @@ func main() {
 		log.Fatal(err)
 	}
 
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth, screenHeight)
 	ebiten.SetWindowTitle("Minify (Ebiten Demo)")
diff --git a/examples/mosaic/main.go b/examples/mosaic/main.go
index 28e615027..4f7c96cd1 100644
--- a/examples/mosaic/main.go
+++ b/examples/mosaic/main.go
@@ -52,7 +52,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 }
 
 type Game struct {
diff --git a/examples/paint/main.go b/examples/paint/main.go
index e92d0d660..3801325d3 100644
--- a/examples/paint/main.go
+++ b/examples/paint/main.go
@@ -49,7 +49,7 @@ func init() {
 		a1, a2, a2, a1,
 		a0, a1, a1, a0,
 	}
-	brushImage, _ = ebiten.NewImageFromImage(&image.Alpha{
+	brushImage = ebiten.NewImageFromImage(&image.Alpha{
 		Pix:    pixels,
 		Stride: 4,
 		Rect:   image.Rect(0, 0, 4, 4),
diff --git a/examples/particles/main.go b/examples/particles/main.go
index 5e7853856..4c818e844 100644
--- a/examples/particles/main.go
+++ b/examples/particles/main.go
@@ -58,7 +58,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	smokeImage, _ = ebiten.NewImageFromImage(img)
+	smokeImage = ebiten.NewImageFromImage(img)
 }
 
 type sprite struct {
diff --git a/examples/perspective/main.go b/examples/perspective/main.go
index 4ecddc89b..ed04643c8 100644
--- a/examples/perspective/main.go
+++ b/examples/perspective/main.go
@@ -82,7 +82,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Perspective (Ebiten Demo)")
diff --git a/examples/platformer/main.go b/examples/platformer/main.go
index 697500f59..8448f231e 100644
--- a/examples/platformer/main.go
+++ b/examples/platformer/main.go
@@ -47,25 +47,25 @@ func init() {
 	if err != nil {
 		panic(err)
 	}
-	rightSprite, _ = ebiten.NewImageFromImage(img)
+	rightSprite = ebiten.NewImageFromImage(img)
 
 	img, _, err = image.Decode(bytes.NewReader(rplatformer.Left_png))
 	if err != nil {
 		panic(err)
 	}
-	leftSprite, _ = ebiten.NewImageFromImage(img)
+	leftSprite = ebiten.NewImageFromImage(img)
 
 	img, _, err = image.Decode(bytes.NewReader(rplatformer.MainChar_png))
 	if err != nil {
 		panic(err)
 	}
-	idleSprite, _ = ebiten.NewImageFromImage(img)
+	idleSprite = ebiten.NewImageFromImage(img)
 
 	img, _, err = image.Decode(bytes.NewReader(rplatformer.Background_png))
 	if err != nil {
 		panic(err)
 	}
-	backgroundImage, _ = ebiten.NewImageFromImage(img)
+	backgroundImage = ebiten.NewImageFromImage(img)
 }
 
 const (
diff --git a/examples/raycasting/main.go b/examples/raycasting/main.go
index 92dd54153..ca87c26af 100644
--- a/examples/raycasting/main.go
+++ b/examples/raycasting/main.go
@@ -59,7 +59,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	bgImage, _ = ebiten.NewImageFromImage(img)
+	bgImage = ebiten.NewImageFromImage(img)
 	triangleImage.Fill(color.White)
 }
 
diff --git a/examples/rotate/main.go b/examples/rotate/main.go
index 03e3461d5..a097dd1e7 100644
--- a/examples/rotate/main.go
+++ b/examples/rotate/main.go
@@ -82,7 +82,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
 	ebiten.SetWindowTitle("Rotate (Ebiten Demo)")
diff --git a/examples/shader/main.go b/examples/shader/main.go
index 2c6317ca5..40d5438cf 100644
--- a/examples/shader/main.go
+++ b/examples/shader/main.go
@@ -54,7 +54,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopherImage, _ = ebiten.NewImageFromImage(img)
+	gopherImage = ebiten.NewImageFromImage(img)
 }
 
 func init() {
@@ -62,7 +62,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gopherBgImage, _ = ebiten.NewImageFromImage(img)
+	gopherBgImage = ebiten.NewImageFromImage(img)
 }
 
 func init() {
@@ -70,7 +70,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	normalImage, _ = ebiten.NewImageFromImage(img)
+	normalImage = ebiten.NewImageFromImage(img)
 }
 
 func init() {
@@ -78,7 +78,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	noiseImage, _ = ebiten.NewImageFromImage(img)
+	noiseImage = ebiten.NewImageFromImage(img)
 }
 
 var shaderSrcs = [][]byte{
diff --git a/examples/sprites/main.go b/examples/sprites/main.go
index bef751cbd..0a08d3f30 100644
--- a/examples/sprites/main.go
+++ b/examples/sprites/main.go
@@ -54,7 +54,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	origEbitenImage, _ := ebiten.NewImageFromImage(img)
+	origEbitenImage := ebiten.NewImageFromImage(img)
 
 	w, h := origEbitenImage.Size()
 	ebitenImage = ebiten.NewImage(w, h)
diff --git a/examples/spriteshd/main.go b/examples/spriteshd/main.go
index 096be54cb..b84aaf47c 100644
--- a/examples/spriteshd/main.go
+++ b/examples/spriteshd/main.go
@@ -56,7 +56,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	origEbitenImage, _ := ebiten.NewImageFromImage(img)
+	origEbitenImage := ebiten.NewImageFromImage(img)
 
 	w, h := origEbitenImage.Size()
 	ebitenImage = ebiten.NewImage(w, h)
diff --git a/examples/tiles/main.go b/examples/tiles/main.go
index c567a3b0a..d357e6cb7 100644
--- a/examples/tiles/main.go
+++ b/examples/tiles/main.go
@@ -56,7 +56,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	tilesImage, _ = ebiten.NewImageFromImage(img)
+	tilesImage = ebiten.NewImageFromImage(img)
 }
 
 type Game struct {
diff --git a/examples/ui/main.go b/examples/ui/main.go
index 3721006ab..b4262adae 100644
--- a/examples/ui/main.go
+++ b/examples/ui/main.go
@@ -58,7 +58,7 @@ func init() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	uiImage, _ = ebiten.NewImageFromImage(img)
+	uiImage = ebiten.NewImageFromImage(img)
 
 	tt, err := opentype.Parse(goregular.TTF)
 	if err != nil {
diff --git a/examples/windowsize/main.go b/examples/windowsize/main.go
index 174dd1e64..b047fa605 100644
--- a/examples/windowsize/main.go
+++ b/examples/windowsize/main.go
@@ -349,7 +349,7 @@ func main() {
 	if err != nil {
 		log.Fatal(err)
 	}
-	gophersImage, _ = ebiten.NewImageFromImage(img)
+	gophersImage = ebiten.NewImageFromImage(img)
 
 	ebiten.SetWindowIcon([]image.Image{createRandomIconImage()})
 
diff --git a/image.go b/image.go
index a7822f68e..f043eda0e 100644
--- a/image.go
+++ b/image.go
@@ -31,8 +31,6 @@ var panicOnErrorAtImageAt bool
 // Image represents a rectangle set of pixels.
 // The pixel format is alpha-premultiplied RGBA.
 // Image implements image.Image and draw.Image.
-//
-// Functions of Image never returns error as of 1.5.0, and error values are always nil.
 type Image struct {
 	// addr holds self to check copying.
 	// See strings.Builder for similar examples.
@@ -729,9 +727,7 @@ func NewImage(width, height int) *Image {
 // NewImageFromImage creates a new image with the given image (source).
 //
 // If source's width or height is less than 1 or more than device-dependent maximum size, NewImageFromImage panics.
-//
-// Error returned by NewImageFromImage is always nil as of 1.5.0.
-func NewImageFromImage(source image.Image) (*Image, error) {
+func NewImageFromImage(source image.Image) *Image {
 	size := source.Bounds().Size()
 
 	width, height := size.X, size.Y
@@ -743,7 +739,7 @@ func NewImageFromImage(source image.Image) (*Image, error) {
 	i.addr = i
 
 	i.ReplacePixels(imageToBytes(source))
-	return i, nil
+	return i
 }
 
 func newScreenFramebufferImage(width, height int) *Image {
diff --git a/image_test.go b/image_test.go
index 08bb569c3..f379d4331 100644
--- a/image_test.go
+++ b/image_test.go
@@ -59,10 +59,7 @@ func openEbitenImage() (*Image, image.Image, error) {
 		return nil, nil, err
 	}
 
-	eimg, err := NewImageFromImage(img)
-	if err != nil {
-		return nil, nil, err
-	}
+	eimg := NewImageFromImage(img)
 	return eimg, img, nil
 }
 
@@ -248,7 +245,7 @@ func TestImageDotByDotInversion(t *testing.T) {
 
 func TestImageReplacePixels(t *testing.T) {
 	// Create a dummy image so that the shared texture is used and origImg's position is shfited.
-	dummyImg, _ := NewImageFromImage(image.NewRGBA(image.Rect(0, 0, 16, 16)))
+	dummyImg := NewImageFromImage(image.NewRGBA(image.Rect(0, 0, 16, 16)))
 	defer dummyImg.Dispose()
 
 	_, origImg, err := openEbitenImage()
@@ -361,9 +358,7 @@ func TestNewImageFromEbitenImage(t *testing.T) {
 		t.Fatal(err)
 		return
 	}
-	if _, err := NewImageFromImage(img); err != nil {
-		t.Errorf("NewImageFromImage returns error: %v", err)
-	}
+	_ = NewImageFromImage(img)
 }
 
 func TestNewImageFromSubImage(t *testing.T) {
@@ -374,11 +369,7 @@ func TestNewImageFromSubImage(t *testing.T) {
 	}
 	w, h := img.Bounds().Dx(), img.Bounds().Dy()
 	subImg := img.(*image.NRGBA).SubImage(image.Rect(1, 1, w-1, h-1))
-	eimg, err := NewImageFromImage(subImg)
-	if err != nil {
-		t.Fatal(err)
-		return
-	}
+	eimg := NewImageFromImage(subImg)
 	sw, sh := subImg.Bounds().Dx(), subImg.Bounds().Dy()
 	w2, h2 := eimg.Size()
 	if w2 != sw {
diff --git a/text/text.go b/text/text.go
index 300b8f149..58a8bd03b 100644
--- a/text/text.go
+++ b/text/text.go
@@ -154,7 +154,7 @@ func getGlyphImages(face font.Face, runes []rune) []*ebiten.Image {
 			d.Dot = fixed.Point26_6{X: x, Y: y}
 			d.DrawString(string(r))
 
-			img, _ := ebiten.NewImageFromImage(rgba)
+			img := ebiten.NewImageFromImage(rgba)
 			if _, ok := glyphImageCache[face][r]; !ok {
 				glyphImageCache[face][r] = &glyphImageCacheEntry{
 					image: img,