Draw key press shadow

go.mod

@@ -3,7 +3,7 @@ module code.rocketnine.space/tslocum/kibodo
 go 1.17
 
 require (
-	github.com/hajimehoshi/ebiten/v2 v2.2.0
+	github.com/hajimehoshi/ebiten/v2 v2.2.1
 	golang.org/x/image v0.0.0-20210628002857-a66eb6448b8d
 )
 
@@ -13,6 +13,6 @@ require (
 	golang.org/x/exp v0.0.0-20211012155715-ffe10e552389 // indirect
 	golang.org/x/mobile v0.0.0-20210924032853-1c027f395ef7 // indirect
 	golang.org/x/sync v0.0.0-20210220032951-036812b2e83c // indirect
-	golang.org/x/sys v0.0.0-20211015200801-69063c4bb744 // indirect
+	golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 // indirect
 	golang.org/x/text v0.3.7 // indirect
 )

go.sum

@@ -98,8 +98,8 @@ github.com/grpc-ecosystem/go-grpc-prometheus v1.2.0/go.mod h1:8NvIoxWQoOIhqOTXgf
 github.com/grpc-ecosystem/grpc-gateway v1.9.5/go.mod h1:vNeuVxBJEsws4ogUvrchl83t/GYV9WGTSLVdBhOQFDY=
 github.com/hajimehoshi/bitmapfont/v2 v2.1.3 h1:JefUkL0M4nrdVwVq7MMZxSTh6mSxOylm+C4Anoucbb0=
 github.com/hajimehoshi/bitmapfont/v2 v2.1.3/go.mod h1:2BnYrkTQGThpr/CY6LorYtt/zEPNzvE/ND69CRTaHMs=
-github.com/hajimehoshi/ebiten/v2 v2.2.0 h1:2mP9HrLLqiH9X3MajElYZEjVZU/CGh22iFkjatxhT4w=
-github.com/hajimehoshi/ebiten/v2 v2.2.0/go.mod h1:olKl/qqhMBBAm2oI7Zy292nCtE+nitlmYKNF3UpbFn0=
+github.com/hajimehoshi/ebiten/v2 v2.2.1 h1:YhITMaBQmnwb4kzAXCCfSkSZmeQX7pfQ7BnC32cnPjc=
+github.com/hajimehoshi/ebiten/v2 v2.2.1/go.mod h1:olKl/qqhMBBAm2oI7Zy292nCtE+nitlmYKNF3UpbFn0=
 github.com/hajimehoshi/file2byteslice v0.0.0-20210813153925-5340248a8f41/go.mod h1:CqqAHp7Dk/AqQiwuhV1yT2334qbA/tFWQW0MD2dGqUE=
 github.com/hajimehoshi/go-mp3 v0.3.2/go.mod h1:qMJj/CSDxx6CGHiZeCgbiq2DSUkbK0UbtXShQcnfyMM=
 github.com/hajimehoshi/oto v0.6.1/go.mod h1:0QXGEkbuJRohbJaxr7ZQSxnju7hEhseiPx2hrh6raOI=
@@ -367,8 +367,8 @@ golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20210510120138-977fb7262007/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20210917161153-d61c044b1678/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20211015200801-69063c4bb744 h1:KzbpndAYEM+4oHRp9JmB2ewj0NHHxO3Z0g7Gus2O1kk=
-golang.org/x/sys v0.0.0-20211015200801-69063c4bb744/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20211019181941-9d821ace8654 h1:id054HUawV2/6IGm2IV8KZQjqtwAOo2CYlOToYqa0d0=
+golang.org/x/sys v0.0.0-20211019181941-9d821ace8654/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=

keyboard.go

@@ -453,15 +453,12 @@ func (k *Keyboard) Draw(target *ebiten.Image) {
 			target.DrawImage(background.SubImage(image.Rect(key.x, key.y, key.x+key.w, key.y+key.h)).(*ebiten.Image), k.op)
 			k.op.ColorM.Reset()
 
-			// Draw border
-			/*darkShade := color.RGBA{60, 60, 60, 255}
-			ox, oy := k.x+key.x, k.y+key.y
-			for j := 0; j < key.w; j++ {
-				target.Set(ox+j, oy, darkShade)
-			}
-			for j := 0; j < key.h; j++ {
-				target.Set(ox, oy+j, darkShade)
-			}*/
+			// Draw shadow.
+			darkShade := color.RGBA{60, 60, 60, 255}
+			subImg := target.SubImage(image.Rect(k.x+key.x, k.y+key.y, k.x+key.x+key.w, k.y+key.y+1)).(*ebiten.Image)
+			subImg.Fill(darkShade)
+			subImg = target.SubImage(image.Rect(k.x+key.x, k.y+key.y, k.x+key.x+1, k.y+key.y+key.h)).(*ebiten.Image)
+			subImg.Fill(darkShade)
 		}
 	}
 }