change PictureData receiver to pointer
@@ -196,8 +196,8 @@ func PictureDataFromImage(img image.Image) PictureData {
//
// Bounds are preserved.
func PictureDataFromPicture(pic Picture) PictureData {
- if pd, ok := pic.(PictureData); ok {
- return pd
+ if pd, ok := pic.(*PictureData); ok {
+ return *pd
}
bounds := pic.Bounds()
@@ -222,7 +222,7 @@ func PictureDataFromPicture(pic Picture) PictureData {
// Image converts PictureData into an image.NRGBA.
//
// The resulting image.NRGBA's Bounds will be equivalent of the PictureData's Bounds.
-func (pd PictureData) Image() *image.NRGBA {
+func (pd *PictureData) Image() *image.NRGBA {
bounds := image.Rect(
int(math.Floor(pd.Rect.Pos.X())),
int(math.Floor(pd.Rect.Pos.Y())),
@@ -248,20 +248,20 @@ func (pd PictureData) Image() *image.NRGBA {
return nrgba
}
-func (pd PictureData) offset(at Vec) int {
+func (pd *PictureData) offset(at Vec) int {
at -= pd.Rect.Pos
x, y := int(at.X()), int(at.Y())
return y*pd.Stride + x
}
// Bounds returns the bounds of this PictureData.
-func (pd PictureData) Bounds() Rect {
+func (pd *PictureData) Bounds() Rect {
return pd.Rect
}
// Slice returns a sub-Picture of this PictureData inside the supplied rectangle.
-func (pd PictureData) Slice(r Rect) Picture {
- return PictureData{
+func (pd *PictureData) Slice(r Rect) Picture {
+ return &PictureData{
Pix: pd.Pix[pd.offset(r.Pos):],
Stride: pd.Stride,
Rect: r,
@@ -269,7 +269,7 @@ func (pd PictureData) Slice(r Rect) Picture {
}
// Color returns the color located at the given position.
-func (pd PictureData) Color(at Vec) NRGBA {
+func (pd *PictureData) Color(at Vec) NRGBA {
if !pd.Rect.Contains(at) {
return NRGBA{0, 0, 0, 0}
}
@@ -277,7 +277,7 @@ func (pd PictureData) Color(at Vec) NRGBA {
}
// SetColor changes the color located at the given position.
-func (pd PictureData) SetColor(at Vec, color color.Color) {
+func (pd *PictureData) SetColor(at Vec, color color.Color) {
if !pd.Rect.Contains(at) {
return
}
