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feat(#26): support zoom. several refactors and fixes

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This commit is contained in:
Tomas Aparicio 2015-04-09 02:08:07 +02:00
parent e603ddd10a
commit 58b2be80a5
7 changed files with 62 additions and 16 deletions
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20
resize.go
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@ -106,6 +106,12 @@ func Resize(buf []byte, o Options) ([]byte, error) {
}
}
// Zoom image if necessary
image, err = zoomImage(image, o.Zoom)
if err != nil {
return nil, err
}
// Rotate / flip image if necessary
image, err = rotateImage(image, o)
if err != nil {
@ -205,23 +211,31 @@ func insertImage(image *C.struct__VipsImage, t ImageType, o Insert, save vipsSav
if imageType != t {
save.Type = t
debug("Image type insert: %s", save.Type)
buf, err := vipsSave(insert, save)
if err != nil {
return nil, err
}
insert, imageType, err = vipsRead(buf)
debug("New type image: %s", imageType)
if err != nil {
return nil, err
}
}
debug("Insert images: %#v", insert)
debug("Insert image: %#v", insert)
return vipsInsert(image, insert, o.Left, o.Top)
}
func zoomImage(image *C.struct__VipsImage, zoom int) (*C.struct__VipsImage, error) {
if zoom == 0 {
return image, nil
}
zoom += 1
return vipsZoom(image, zoom)
}
func shrinkImage(image *C.struct__VipsImage, o Options, residual float64, shrink int) (*C.struct__VipsImage, float64, error) {
// Use vips_shrink with the integral reduction
image, err := vipsShrink(image, shrink)