类型 Metrics
API 文档由 Go 源码生成，内容为英文。
type Metrics struct {
Width float32
Height float32
Ascent float32
Descent float32
Leading float32
}Metrics contains one shaped line's logical metrics.
API 文档由 Go 源码生成，内容为英文。
type Metrics struct {
Width float32
Height float32
Ascent float32
Descent float32
Leading float32
}Metrics contains one shaped line's logical metrics.