From 3f34f63ccc97cba2a8db479f6a40a00b39d58138 Mon Sep 17 00:00:00 2001
From: xiaoqidun <xiaoqidun@gmail.com>
Date: Sat, 12 Sep 2026 03:10:16 +0800
Subject: [PATCH] =?UTF-8?q?feat(=E5=86=85=E5=AD=98=E5=8D=A0=E7=94=A8):=20?=
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---
 ofdgo_renderer_image.go | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/ofdgo_renderer_image.go b/ofdgo_renderer_image.go
index 9612d5f..9b5db40 100644
--- a/ofdgo_renderer_image.go
+++ b/ofdgo_renderer_image.go
@@ -405,6 +405,19 @@ func imageNRGBAAt(img image.Image, x, y int) color.NRGBA {
 		r, g, b, _ := src.YCbCrAt(x, y).RGBA()
 		return color.NRGBA{R: uint8(r >> 8), G: uint8(g >> 8), B: uint8(b >> 8), A: 255}
 	}
+	if src, ok := img.(*image.RGBA); ok {
+		c := src.RGBA64At(x, y)
+		if c.A == 0 {
+			return color.NRGBA{}
+		}
+		r, g, b, a := uint32(c.R), uint32(c.G), uint32(c.B), uint32(c.A)
+		if a != 0xffff {
+			r = r * 0xffff / a
+			g = g * 0xffff / a
+			b = b * 0xffff / a
+		}
+		return color.NRGBA{R: uint8(r >> 8), G: uint8(g >> 8), B: uint8(b >> 8), A: uint8(a >> 8)}
+	}
 	return color.NRGBAModel.Convert(img.At(x, y)).(color.NRGBA)
 }