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internal/affine: Optimize Scale and Translate

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This commit is contained in:
Hajime Hoshi 2021-09-13 02:18:07 +09:00
parent 39e7f71ccb
commit 64a0577c26
1 changed files with 24 additions and 0 deletions
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24
internal/affine/colorm.go
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@ -579,12 +579,20 @@ func (c *colorMImplBodyTranslate) Concat(other ColorM) ColorM {
} }
func (c ColorMIdentity) Scale(r, g, b, a float32) ColorM { func (c ColorMIdentity) Scale(r, g, b, a float32) ColorM {
if r == 1 && g == 1 && b == 1 && a == 1 {
return c
}
return colorMImplScale{ return colorMImplScale{
scale: [...]float32{r, g, b, a}, scale: [...]float32{r, g, b, a},
} }
} }
func (c colorMImplScale) Scale(r, g, b, a float32) ColorM { func (c colorMImplScale) Scale(r, g, b, a float32) ColorM {
if r == 1 && g == 1 && b == 1 && a == 1 {
return c
}
return colorMImplScale{ return colorMImplScale{
scale: [...]float32{ scale: [...]float32{
c.scale[0] * r, c.scale[0] * r,
@ -596,6 +604,10 @@ func (c colorMImplScale) Scale(r, g, b, a float32) ColorM {
} }
func (c *colorMImplBodyTranslate) Scale(r, g, b, a float32) ColorM { func (c *colorMImplBodyTranslate) Scale(r, g, b, a float32) ColorM {
if r == 1 && g == 1 && b == 1 && a == 1 {
return c
}
if c.ScaleOnly() { if c.ScaleOnly() {
sr, sg, sb, sa := c.scaleElements() sr, sg, sb, sa := c.scaleElements()
return colorMImplScale{ return colorMImplScale{
@ -625,6 +637,10 @@ func (c *colorMImplBodyTranslate) Scale(r, g, b, a float32) ColorM {
} }
func (c ColorMIdentity) Translate(r, g, b, a float32) ColorM { func (c ColorMIdentity) Translate(r, g, b, a float32) ColorM {
if r == 0 && g == 0 && b == 0 && a == 0 {
return c
}
return &colorMImplBodyTranslate{ return &colorMImplBodyTranslate{
body: colorMIdentityBody, body: colorMIdentityBody,
translate: [...]float32{r, g, b, a}, translate: [...]float32{r, g, b, a},
@ -632,6 +648,10 @@ func (c ColorMIdentity) Translate(r, g, b, a float32) ColorM {
} }
func (c colorMImplScale) Translate(r, g, b, a float32) ColorM { func (c colorMImplScale) Translate(r, g, b, a float32) ColorM {
if r == 0 && g == 0 && b == 0 && a == 0 {
return c
}
return &colorMImplBodyTranslate{ return &colorMImplBodyTranslate{
body: [...]float32{ body: [...]float32{
c.scale[0], 0, 0, 0, c.scale[0], 0, 0, 0,
@ -644,6 +664,10 @@ func (c colorMImplScale) Translate(r, g, b, a float32) ColorM {
} }
func (c *colorMImplBodyTranslate) Translate(r, g, b, a float32) ColorM { func (c *colorMImplBodyTranslate) Translate(r, g, b, a float32) ColorM {
if r == 0 && g == 0 && b == 0 && a == 0 {
return c
}
es := c.translate es := c.translate
es[0] += r es[0] += r
es[1] += g es[1] += g