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ebiten: add ColorScale.Set and ColorScale.SetWithColor

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Closes #3370
This commit is contained in:
Hajime Hoshi
2026-01-07 02:13:32 +09:00
parent 09bf4baf91
commit 73b464af96
1 changed files with 14 additions and 0 deletions
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colorscale.go
+14
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@@ -66,6 +66,14 @@ func (c *ColorScale) elements() (float32, float32, float32, float32) {
return c.r_1 + 1, c.g_1 + 1, c.b_1 + 1, c.a_1 + 1 return c.r_1 + 1, c.g_1 + 1, c.b_1 + 1, c.a_1 + 1
} }
// Set overwrites the current scale with r, g, b, a.
func (c *ColorScale) Set(r, g, b, a float32) {
c.r_1 = r - 1
c.g_1 = g - 1
c.b_1 = b - 1
c.a_1 = a - 1
}
// SetR overwrites the current red value with r. // SetR overwrites the current red value with r.
func (c *ColorScale) SetR(r float32) { func (c *ColorScale) SetR(r float32) {
c.r_1 = r - 1 c.r_1 = r - 1
@@ -86,6 +94,12 @@ func (c *ColorScale) SetA(a float32) {
c.a_1 = a - 1 c.a_1 = a - 1
} }
// SetWithColor overwrites the current scale with the given color.
func (c *ColorScale) SetWithColor(clr color.Color) {
cr, cg, cb, ca := clr.RGBA()
c.Set(float32(cr)/0xffff, float32(cg)/0xffff, float32(cb)/0xffff, float32(ca)/0xffff)
}
// Scale multiplies the given values to the current scale. // Scale multiplies the given values to the current scale.
// //
// Scale is slightly different from colorm.ColorM's Scale in terms of alphas. // Scale is slightly different from colorm.ColorM's Scale in terms of alphas.