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Fix padding and extend behaior when converting from a fromat without alpha support to one with alpha support

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This commit is contained in:
DarthSim
2020-08-21 18:04:33 +06:00
parent dbe1ffd14b
commit 965cd68ecf
6 changed files with 33 additions and 8 deletions
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20
vips.go
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@@ -590,20 +590,30 @@ func (img *vipsImage) Replicate(width, height int) error {
return nil
}
func (img *vipsImage) Embed(width, height int, offX, offY int, bg rgbColor) error {
func (img *vipsImage) Embed(width, height int, offX, offY int, bg rgbColor, transpBg bool) error {
var tmp *C.VipsImage
if err := img.RgbColourspace(); err != nil {
return err
}
var bgc []C.double
if img.HasAlpha() {
if transpBg {
if !img.HasAlpha() {
if C.vips_addalpha_go(img.VipsImage, &tmp) != 0 {
return vipsError()
}
C.swap_and_clear(&img.VipsImage, tmp)
}
bgc = []C.double{C.double(0)}
} else {
bgc = []C.double{C.double(bg.R), C.double(bg.G), C.double(bg.B)}
bgc = []C.double{C.double(bg.R), C.double(bg.G), C.double(bg.B), 1.0}
}
var tmp *C.VipsImage
if C.vips_embed_go(img.VipsImage, &tmp, C.int(offX), C.int(offY), C.int(width), C.int(height), &bgc[0], C.int(len(bgc))) != 0 {
bgn := minInt(int(img.VipsImage.Bands), len(bgc))
if C.vips_embed_go(img.VipsImage, &tmp, C.int(offX), C.int(offY), C.int(width), C.int(height), &bgc[0], C.int(bgn)) != 0 {
return vipsError()
}
C.swap_and_clear(&img.VipsImage, tmp)