font: add some comments for the XxxBytes methods.
Change-Id: I391b539e79d7e35f80d9ee0b8c7c70c2f42e2e99
Reviewed-on: https://go-review.googlesource.com/34095
Reviewed-by: Dave Day <djd@golang.org>
diff --git a/font/font.go b/font/font.go
index a0a66d2..36a1638 100644
--- a/font/font.go
+++ b/font/font.go
@@ -126,6 +126,8 @@
// vertical line? Should DrawString return the number of runes drawn?
// DrawBytes draws s at the dot and advances the dot's location.
+//
+// It is equivalent to DrawString(string(s)) but may be more efficient.
func (d *Drawer) DrawBytes(s []byte) {
prevC := rune(-1)
for len(s) > 0 {
@@ -168,6 +170,8 @@
}
// MeasureBytes returns how far dot would advance by drawing s.
+//
+// It is equivalent to MeasureString(string(s)) but may be more efficient.
func (d *Drawer) MeasureBytes(s []byte) (advance fixed.Int26_6) {
return MeasureBytes(d.Face, s)
}
@@ -178,6 +182,8 @@
}
// MeasureBytes returns how far dot would advance by drawing s with f.
+//
+// It is equivalent to MeasureString(string(s)) but may be more efficient.
func MeasureBytes(f Face, s []byte) (advance fixed.Int26_6) {
prevC := rune(-1)
for len(s) > 0 {
