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ebiten: add ColorM.ReadElements

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Updates #2171
Closes #2347
This commit is contained in:
Hajime Hoshi 2022-11-02 02:55:42 +09:00
parent 84289a06ba
commit 0660c4ea8a
1 changed files with 14 additions and 0 deletions
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14
colorm.go
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@ -15,6 +15,7 @@
package ebiten package ebiten
import ( import (
"fmt"
"image/color" "image/color"
"github.com/hajimehoshi/ebiten/v2/internal/affine" "github.com/hajimehoshi/ebiten/v2/internal/affine"
@ -128,3 +129,16 @@ func (c *ColorM) IsInvertible() bool {
func (c *ColorM) Invert() { func (c *ColorM) Invert() {
c.impl = c.affineColorM().Invert() c.impl = c.affineColorM().Invert()
} }
// ReadElements reads the body part and the translation part to the given float32 slices.
//
// len(body) must be 16 and len(translation) must be 4. Otherwise, ReadElements panics.
func (c *ColorM) ReadElements(body []float32, translation []float32) {
if len(body) != 16 {
panic(fmt.Sprintf("ebiten: len(body) must be 16 but %d", len(body)))
}
if len(translation) != 4 {
panic(fmt.Sprintf("ebiten: len(translation) must be 4 but %d", len(translation)))
}
c.affineColorM().Elements(body, translation)
}