Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

go1.7.4 darwin/amd64

What operating system and processor architecture are you using (go env)?

GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/raphaelgeronimi/Local/Others/Go workspace"
GORACE=""
GOROOT="/opt/local/lib/go"
GOTOOLDIR="/opt/local/lib/go/pkg/tool/darwin_amd64"
CC="/usr/bin/clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/zw/0zvr11l11975vn4gk7s4hrx00000gn/T/go-build732769753=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

What did you do?

I need to measure the exact drawing bounds of a string with a Face from x/image/font, to draw it in a bitmap of the proper size, and position the origin of the string properly so as to not clip any extraneous left, top, bottom or right typographic "limb".

What did you expect to see?

A function or method to measure the exact bounds, as:

• It is a very common need
• Measuring them is not trivial for a library end-user as it requires some typographic knowledge (e.g., kerning), and the amount of duplicated code goes beyond the usual loop 3-liners (with standard formatting, this takes 40 lines).

What did you see instead?

No method found.

I wrote a patch with the missing functions and methods BoundString and BoundBytes, that I am ready to contribute.