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Cleaner fix

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This commit is contained in:
James Schofield 2016-11-10 15:15:52 -05:00
parent 31a54299fb
commit a1b9efdb97
3 changed files with 21 additions and 16 deletions
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17
resize.go
View file

@ -112,8 +112,11 @@ func Resize(buf []byte, o Options) ([]byte, error) {
return nil, err
}
// Only flatten PNG for now
flatten := imageType == PNG && o.Background != ColorBlack
// Flatten image on a background, if necessary
image, err = imageFlatten(image, imageType, o)
if err != nil {
return nil, err
}
saveOptions := vipsSaveOptions{
Quality: o.Quality,
@ -122,8 +125,6 @@ func Resize(buf []byte, o Options) ([]byte, error) {
Interlace: o.Interlace,
NoProfile: o.NoProfile,
Interpretation: o.Interpretation,
Flatten: flatten,
Background: o.Background,
}
// Finally get the resultant buffer
@ -324,6 +325,14 @@ func watermakImage(image *C.VipsImage, w Watermark) (*C.VipsImage, error) {
return image, nil
}
func imageFlatten(image *C.VipsImage, imageType ImageType, o Options) (*C.VipsImage, error) {
// Only PNG images are supported for now
if imageType != PNG || o.Background == ColorBlack {
return image, nil
}
return vipsFlattenBackground(image, o.Background)
}
func zoomImage(image *C.VipsImage, zoom int) (*C.VipsImage, error) {
if zoom == 0 {
return image, nil

11
vips.go
View file

@ -55,8 +55,6 @@ type vipsSaveOptions struct {
Interlace bool
NoProfile bool
Interpretation Interpretation
Flatten bool
Background Color
}
type vipsWatermarkOptions struct {
@ -343,15 +341,6 @@ func vipsPreSave(image *C.VipsImage, o *vipsSaveOptions) (*C.VipsImage, error) {
image = outImage
}
// Flatten image on a background, if necessary
if o.Flatten {
var err error
if outImage, err = vipsFlattenBackground(image, o.Background); err != nil {
return nil, err
}
image = outImage
}
return image, nil
}

9
vips.h
View file

@ -283,11 +283,18 @@ vips_is_16bit (VipsInterpretation interpretation) {
int
vips_flatten_background_brigde(VipsImage *in, VipsImage **out, double r, double g, double b) {
if (vips_is_16bit(in->Type)) {
r = 65535 * r / 255;
g = 65535 * g / 255;
b = 65535 * b / 255;
}
double background[3] = {r, g, b};
VipsArrayDouble *vipsBackground = vips_array_double_new(background, 3);
return vips_flatten(in, out,
"background", vipsBackground, "max_alpha", 255.0,
"background", vipsBackground,
"max_alpha", vips_is_16bit(in->Type) ? 65535.0 : 255.0,
NULL
);
}