From 0660c4ea8a227fbcaf92f87b5c710bbadf0952e7 Mon Sep 17 00:00:00 2001 From: Hajime Hoshi Date: Wed, 2 Nov 2022 02:55:42 +0900 Subject: [PATCH] ebiten: add ColorM.ReadElements Updates #2171 Closes #2347 --- colorm.go | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/colorm.go b/colorm.go index d4bcbfcc4..90edd036d 100644 --- a/colorm.go +++ b/colorm.go @@ -15,6 +15,7 @@ package ebiten import ( + "fmt" "image/color" "github.com/hajimehoshi/ebiten/v2/internal/affine" @@ -128,3 +129,16 @@ func (c *ColorM) IsInvertible() bool { func (c *ColorM) 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) +}