feat(文件拆分): 拆分字体图像基础能力

internal/base/font/metrics.go

@@ -0,0 +1,24 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package font
+
+// glyphPather 接收字体设计坐标中的轮廓指令
+type glyphPather interface {
+	MoveTo(float64, float64)
+	LineTo(float64, float64)
+	QuadTo(float64, float64, float64, float64)
+	CubeTo(float64, float64, float64, float64, float64, float64)
+	Close()
+}