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internal/affine: Refactoring: UnsafeScaleElements -> scaleElements

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This commit is contained in:
Hajime Hoshi 2021-09-03 23:56:17 +09:00
parent 3406430956
commit e5c051a437
1 changed files with 24 additions and 15 deletions
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35
internal/affine/colorm.go
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@ -44,7 +44,6 @@ var (
type ColorM interface {
IsIdentity() bool
ScaleOnly() bool
UnsafeScaleElements() *[4]float32
UnsafeElements() (*[16]float32, *[4]float32)
Apply(clr color.Color) color.Color
@ -67,6 +66,8 @@ type ColorM interface {
// Translate translates the matrix by (r, g, b, a).
Translate(r, g, b, a float32) ColorM
scaleElements() (r, g, b, a float32)
}
func ColorMString(c ColorM) string {
@ -164,16 +165,16 @@ func (c *colorMImplBodyTranslate) ScaleOnly() bool {
return true
}
func (c ColorMIdentity) UnsafeScaleElements() *[4]float32 {
return &[...]float32{1, 1, 1, 1}
func (c ColorMIdentity) scaleElements() (r, g, b, a float32) {
return 1, 1, 1, 1
}
func (c colorMImplScale) UnsafeScaleElements() *[4]float32 {
return &c.scale
func (c colorMImplScale) scaleElements() (r, g, b, a float32) {
return c.scale[0], c.scale[1], c.scale[2], c.scale[3]
}
func (c *colorMImplBodyTranslate) UnsafeScaleElements() *[4]float32 {
return &[...]float32{c.body[0], c.body[5], c.body[10], c.body[15]}
func (c *colorMImplBodyTranslate) scaleElements() (r, g, b, a float32) {
return c.body[0], c.body[5], c.body[10], c.body[15]
}
func colorToFloat32s(clr color.Color) (float32, float32, float32, float32) {
@ -452,10 +453,19 @@ func (c colorMImplScale) Equals(other ColorM) bool {
if !other.ScaleOnly() {
return false
}
for i, s := range other.UnsafeScaleElements() {
if c.scale[i] != s {
r, g, b, a := other.scaleElements()
if c.scale[0] != r {
return false
}
if c.scale[1] != g {
return false
}
if c.scale[2] != b {
return false
}
if c.scale[3] != a {
return false
}
return true
}
@ -477,8 +487,7 @@ func (c colorMImplScale) Concat(other ColorM) ColorM {
}
if other.ScaleOnly() {
s := other.UnsafeScaleElements()
return c.Scale(s[0], s[1], s[2], s[3])
return c.Scale(other.scaleElements())
}
lhsb, lhst := other.UnsafeElements()
@ -535,9 +544,9 @@ func (c colorMImplScale) Scale(r, g, b, a float32) ColorM {
func (c *colorMImplBodyTranslate) Scale(r, g, b, a float32) ColorM {
if c.ScaleOnly() {
s := c.UnsafeScaleElements()
sr, sg, sb, sa := c.scaleElements()
return colorMImplScale{
scale: [...]float32{r * s[0], g * s[1], b * s[2], a * s[3]},
scale: [...]float32{r * sr, g * sg, b * sb, a * sa},
}
}