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internal/affine: Replace isInited with isIdentity

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This commit is contained in:
Hajime Hoshi 2021-07-26 20:29:24 +09:00
parent d0ae73084b
commit 2c26e85183
1 changed files with 27 additions and 29 deletions
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56
internal/affine/colorm.go
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@ -72,8 +72,14 @@ func clamp(x float32) float32 {
return x
}
func (c *ColorM) isInited() bool {
return c != nil && c.impl != nil
func (c *ColorM) isIdentity() bool {
if c == nil {
return true
}
if c.impl == nil {
return true
}
return c.impl.IsIdentity()
}
func (c *colorMImplBodyTranslate) IsIdentity() bool {
@ -81,7 +87,7 @@ func (c *colorMImplBodyTranslate) IsIdentity() bool {
}
func (c *ColorM) ScaleOnly() bool {
if c == nil || c.impl == nil {
if c.isIdentity() {
return true
}
return c.impl.ScaleOnly()
@ -133,7 +139,7 @@ func (c *colorMImplBodyTranslate) ScaleOnly() bool {
}
func (c *ColorM) Apply(clr color.Color) color.Color {
if !c.isInited() {
if c.isIdentity() {
return clr
}
return c.impl.Apply(clr)
@ -168,7 +174,7 @@ func (c *colorMImplBodyTranslate) Apply(clr color.Color) color.Color {
}
func (c *ColorM) UnsafeElements() ([]float32, []float32) {
if !c.isInited() {
if c.isIdentity() {
return colorMIdentityBody[:], colorMIdentityTranslate[:]
}
return c.impl.UnsafeElements()
@ -179,7 +185,7 @@ func (c *colorMImplBodyTranslate) UnsafeElements() ([]float32, []float32) {
}
func (c *ColorM) det() float32 {
if !c.isInited() {
if c.isIdentity() {
return 1
}
return c.impl.det()
@ -225,7 +231,7 @@ func (c *ColorM) IsInvertible() bool {
// Invert inverts the matrix.
// If c is not invertible, Invert panics.
func (c *ColorM) Invert() *ColorM {
if !c.isInited() {
if c.isIdentity() {
return nil
}
return c.impl.Invert()
@ -352,7 +358,7 @@ func (c *ColorM) SetElement(i, j int, element float32) *ColorM {
newImpl := &colorMImplBodyTranslate{
body: colorMIdentityBody,
}
if c.isInited() {
if !c.isIdentity() {
*newImpl = *c.impl
}
if j < (ColorMDim - 1) {
@ -366,48 +372,40 @@ func (c *ColorM) SetElement(i, j int, element float32) *ColorM {
}
func (c *ColorM) Equals(other *ColorM) bool {
if !c.isInited() {
if !other.isInited() {
return true
}
return other.impl.IsIdentity()
if c.isIdentity() {
return other.isIdentity()
}
if other.isIdentity() {
return false
}
return c.impl.Equals(other)
}
func (c *colorMImplBodyTranslate) Equals(other *ColorM) bool {
lhsb := &colorMIdentityBody
lhst := &colorMIdentityTranslate
lhsb := &other.impl.body
lhst := &other.impl.translate
rhsb := &c.body
rhst := &c.translate
if other.isInited() {
lhsb = &other.impl.body
lhst = &other.impl.translate
}
return *lhsb == *rhsb && *lhst == *rhst
}
// Concat multiplies a color matrix with the other color matrix.
// This is same as muptiplying the matrix other and the matrix c in this order.
func (c *ColorM) Concat(other *ColorM) *ColorM {
if !c.isInited() {
if c.isIdentity() {
return other
}
if !other.isInited() {
if other.isIdentity() {
return c
}
return c.impl.Concat(other)
}
func (c *colorMImplBodyTranslate) Concat(other *ColorM) *ColorM {
lhsb := &colorMIdentityBody
lhst := &colorMIdentityTranslate
lhsb := &other.impl.body
lhst := &other.impl.translate
rhsb := &c.body
rhst := &c.translate
if other.isInited() {
lhsb = &other.impl.body
lhst = &other.impl.translate
}
return &ColorM{
impl: &colorMImplBodyTranslate{
@ -426,7 +424,7 @@ func (c *colorMImplBodyTranslate) Concat(other *ColorM) *ColorM {
// Scale scales the matrix by (r, g, b, a).
func (c *ColorM) Scale(r, g, b, a float32) *ColorM {
if !c.isInited() {
if c.isIdentity() {
return getCachedScalingColorM(r, g, b, a)
}
if c.ScaleOnly() {
@ -461,7 +459,7 @@ func (c *colorMImplBodyTranslate) Scale(r, g, b, a float32) *ColorM {
// Translate translates the matrix by (r, g, b, a).
func (c *ColorM) Translate(r, g, b, a float32) *ColorM {
if !c.isInited() {
if c.isIdentity() {
return &ColorM{
impl: &colorMImplBodyTranslate{
body: colorMIdentityBody,