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text/v2: allow io.Reader for NewGoTextFaceSource

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This enables to pass fs.File to NewGoTextFaceSource.

Updates #2454
This commit is contained in:
Hajime Hoshi 2023-11-26 17:21:31 +09:00
parent 8291a98756
commit 8777d2c529
1 changed files with 5 additions and 5 deletions
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10
text/v2/gotextfacesource.go
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@ -74,8 +74,8 @@ type GoTextFaceSource struct {
m sync.Mutex
}
func toFontResource(source io.ReadSeeker) (font.Resource, error) {
// font.Resource has io.ReaderAt in addition to io.ReadSeeker.
func toFontResource(source io.Reader) (font.Resource, error) {
// font.Resource has io.Seeker and io.ReaderAt in addition to io.Reader.
// If source has it, use it as it is.
if s, ok := source.(font.Resource); ok {
return s, nil
@ -83,7 +83,7 @@ func toFontResource(source io.ReadSeeker) (font.Resource, error) {
// Read all the bytes and convert this to bytes.Reader.
// This is a very rough solution, but it works.
// TODO: Implement io.ReaderAt in a more efficient way.
// TODO: Implement io.ReaderAt in a more efficient way when source is io.Seeker.
bs, err := io.ReadAll(source)
if err != nil {
return nil, err
@ -93,7 +93,7 @@ func toFontResource(source io.ReadSeeker) (font.Resource, error) {
}
// NewGoTextFaceSource parses an OpenType or TrueType font and returns a GoTextFaceSource object.
func NewGoTextFaceSource(source io.ReadSeeker) (*GoTextFaceSource, error) {
func NewGoTextFaceSource(source io.Reader) (*GoTextFaceSource, error) {
src, err := toFontResource(source)
if err != nil {
return nil, err
@ -119,7 +119,7 @@ func NewGoTextFaceSource(source io.ReadSeeker) (*GoTextFaceSource, error) {
}
// NewGoTextFaceSourcesFromCollection parses an OpenType or TrueType font collection and returns a slice of GoTextFaceSource objects.
func NewGoTextFaceSourcesFromCollection(source io.ReadSeeker) ([]*GoTextFaceSource, error) {
func NewGoTextFaceSourcesFromCollection(source io.Reader) ([]*GoTextFaceSource, error) {
src, err := toFontResource(source)
if err != nil {
return nil, err