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Make filters low-level

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This commit is contained in:
DarthSim
2022-07-28 15:32:36 +06:00
parent 98ee76d1fa
commit cd5c30fa0d
4 changed files with 97 additions and 153 deletions
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31
processing/apply_filters.go
View File

@@ -2,7 +2,6 @@ package processing
import (
"github.com/imgproxy/imgproxy/v3/imagedata"
"github.com/imgproxy/imgproxy/v3/imath"
"github.com/imgproxy/imgproxy/v3/options"
"github.com/imgproxy/imgproxy/v3/vips"
)
@@ -20,35 +19,7 @@ func applyFilters(pctx *pipelineContext, img *vips.Image, po *options.Processing
return err
}
// When image has alpha, we need to premultiply it to get rid of black edges
if err := img.Premultiply(); err != nil {
return err
}
if po.Blur > 0 {
if err := img.Blur(po.Blur); err != nil {
return err
}
}
if po.Sharpen > 0 {
if err := img.Sharpen(po.Sharpen); err != nil {
return err
}
}
if po.Pixelate > 1 {
pixels := imath.Min(po.Pixelate, imath.Min(img.Width(), img.Height()))
if err := img.Pixelate(pixels); err != nil {
return err
}
}
if err := img.Unpremultiply(); err != nil {
return err
}
if err := img.CastUchar(); err != nil {
if err := img.ApplyFilters(po.Blur, po.Sharpen, po.Pixelate); err != nil {
return err
}

164
vips/vips.c
View File

@@ -177,22 +177,6 @@ vips_addalpha_go(VipsImage *in, VipsImage **out) {
return vips_addalpha(in, out, NULL);
}
int
vips_premultiply_go(VipsImage *in, VipsImage **out) {
if (!vips_image_hasalpha(in))
return vips_copy(in, out, NULL);
return vips_premultiply(in, out, NULL);
}
int
vips_unpremultiply_go(VipsImage *in, VipsImage **out) {
if (!vips_image_hasalpha(in))
return vips_copy(in, out, NULL);
return vips_unpremultiply(in, out, NULL);
}
int
vips_copy_go(VipsImage *in, VipsImage **out) {
return vips_copy(in, out, NULL);
@@ -229,55 +213,6 @@ vips_resize_go(VipsImage *in, VipsImage **out, double wscale, double hscale) {
return 0;
}
int
vips_pixelate(VipsImage *in, VipsImage **out, int pixels) {
VipsImage *base = vips_image_new();
VipsImage **t = (VipsImage **) vips_object_local_array(VIPS_OBJECT(base), 3);
int w, h, tw, th;
w = in->Xsize;
h = in->Ysize;
tw = (int)((double)(w + pixels - 1) / pixels) * pixels;
th = (int)((double)(h + pixels - 1) / pixels) * pixels;
if (tw > w || th > h) {
if (vips_embed(in, &t[0], 0, 0, tw, th, "extend", VIPS_EXTEND_COPY, NULL)) {
clear_image(&base);
return 1;
}
} else {
if (vips_copy(in, &t[0], NULL)) {
clear_image(&base);
return 1;
}
}
if (
vips_shrink(t[0], &t[1], pixels, pixels, NULL) ||
vips_zoom(t[1], &t[2], pixels, pixels, NULL)
) {
clear_image(&base);
return 1;
}
if (tw > w || th > h) {
if (vips_extract_area(t[2], out, 0, 0, w, h, NULL)) {
clear_image(&base);
return 1;
}
} else {
if (vips_copy(t[2], out, NULL)) {
clear_image(&base);
return 1;
}
}
clear_image(&base);
return 0;
}
int
vips_icc_is_srgb_iec61966(VipsImage *in) {
const void *data;
@@ -364,13 +299,100 @@ vips_smartcrop_go(VipsImage *in, VipsImage **out, int width, int height) {
}
int
vips_gaussblur_go(VipsImage *in, VipsImage **out, double sigma) {
return vips_gaussblur(in, out, sigma, NULL);
}
vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
double sharp_sigma, int pixelate_pixels) {
int
vips_sharpen_go(VipsImage *in, VipsImage **out, double sigma) {
return vips_sharpen(in, out, "sigma", sigma, NULL);
VipsImage *base = vips_image_new();
VipsImage **t = (VipsImage **) vips_object_local_array(VIPS_OBJECT(base), 9);
VipsInterpretation interpretation = in->Type;
VipsBandFormat format = in->BandFmt;
gboolean premultiplied = FALSE;
if ((blur_sigma > 0 || sharp_sigma > 0) && vips_image_hasalpha(in)) {
if (vips_premultiply(in, &t[0], NULL)) {
clear_image(&base);
return 1;
}
in = t[0];
premultiplied = TRUE;
}
if (blur_sigma > 0.0) {
if (vips_gaussblur(in, &t[1], blur_sigma, NULL)) {
clear_image(&base);
return 1;
}
in = t[1];
}
if (sharp_sigma > 0.0) {
if (vips_sharpen(in, &t[2], "sigma", sharp_sigma, NULL)) {
clear_image(&base);
return 1;
}
in = t[2];
}
pixelate_pixels = VIPS_MIN(pixelate_pixels, VIPS_MAX(in->Xsize, in->Ysize));
if (pixelate_pixels > 1) {
int w, h, tw, th;
w = in->Xsize;
h = in->Ysize;
tw = (int)(VIPS_CEIL((double)w / pixelate_pixels)) * pixelate_pixels;
th = (int)(VIPS_CEIL((double)h / pixelate_pixels)) * pixelate_pixels;
if (tw > w || th > h) {
if (vips_embed(in, &t[3], 0, 0, tw, th, "extend", VIPS_EXTEND_MIRROR, NULL)) {
clear_image(&base);
return 1;
}
in = t[3];
}
if (
vips_shrink(in, &t[4], pixelate_pixels, pixelate_pixels, NULL) ||
vips_zoom(t[4], &t[5], pixelate_pixels, pixelate_pixels, NULL)
) {
clear_image(&base);
return 1;
}
in = t[5];
if (tw > w || th > h) {
if (vips_extract_area(in, &t[6], 0, 0, w, h, NULL)) {
clear_image(&base);
return 1;
}
in = t[6];
}
}
if (premultiplied) {
if (vips_unpremultiply(in, &t[7], NULL)) {
clear_image(&base);
return 1;
}
in = t[7];
}
int res =
vips_colourspace(in, &t[8], interpretation, NULL) ||
vips_cast(t[8], out, format, NULL);
clear_image(&base);
return res;
}
int

48
vips/vips.go
View File

@@ -363,28 +363,6 @@ func (img *Image) HasAlpha() bool {
return C.vips_image_hasalpha(img.VipsImage) > 0
}
func (img *Image) Premultiply() error {
var tmp *C.VipsImage
if C.vips_premultiply_go(img.VipsImage, &tmp) != 0 {
return Error()
}
C.swap_and_clear(&img.VipsImage, tmp)
return nil
}
func (img *Image) Unpremultiply() error {
var tmp *C.VipsImage
if C.vips_unpremultiply_go(img.VipsImage, &tmp) != 0 {
return Error()
}
C.swap_and_clear(&img.VipsImage, tmp)
return nil
}
func (img *Image) GetInt(name string) (int, error) {
var i C.int
@@ -499,18 +477,6 @@ func (img *Image) Resize(wscale, hscale float64) error {
return nil
}
func (img *Image) Pixelate(pixels int) error {
var tmp *C.VipsImage
if C.vips_pixelate(img.VipsImage, &tmp, C.int(pixels)) != 0 {
return Error()
}
C.swap_and_clear(&img.VipsImage, tmp)
return nil
}
func (img *Image) Orientation() C.int {
return C.vips_get_orientation(img.VipsImage)
}
@@ -609,25 +575,15 @@ func (img *Image) Flatten(bg Color) error {
return nil
}
func (img *Image) Blur(sigma float32) error {
func (img *Image) ApplyFilters(blurSigma, sharpSigma float32, pixelatePixels int) error {
var tmp *C.VipsImage
if C.vips_gaussblur_go(img.VipsImage, &tmp, C.double(sigma)) != 0 {
if C.vips_apply_filters(img.VipsImage, &tmp, C.double(blurSigma), C.double(sharpSigma), C.int(pixelatePixels)) != 0 {
return Error()
}
C.swap_and_clear(&img.VipsImage, tmp)
return nil
}
func (img *Image) Sharpen(sigma float32) error {
var tmp *C.VipsImage
if C.vips_sharpen_go(img.VipsImage, &tmp, C.double(sigma)) != 0 {
return Error()
}
C.swap_and_clear(&img.VipsImage, tmp)
return nil
}

7
vips/vips.h
View File

@@ -34,8 +34,6 @@ int vips_image_get_array_int_go(VipsImage *image, const char *name, int **out, i
void vips_image_set_array_int_go(VipsImage *image, const char *name, const int *array, int n);
int vips_addalpha_go(VipsImage *in, VipsImage **out);
int vips_premultiply_go(VipsImage *in, VipsImage **out);
int vips_unpremultiply_go(VipsImage *in, VipsImage **out);
int vips_copy_go(VipsImage *in, VipsImage **out);
@@ -44,8 +42,6 @@ int vips_rad2float_go(VipsImage *in, VipsImage **out);
int vips_resize_go(VipsImage *in, VipsImage **out, double wscale, double hscale);
int vips_pixelate(VipsImage *in, VipsImage **out, int pixels);
int vips_icc_is_srgb_iec61966(VipsImage *in);
int vips_has_embedded_icc(VipsImage *in);
int vips_icc_import_go(VipsImage *in, VipsImage **out);
@@ -64,8 +60,7 @@ int vips_trim(VipsImage *in, VipsImage **out, double threshold,
gboolean smart, double r, double g, double b,
gboolean equal_hor, gboolean equal_ver);
int vips_gaussblur_go(VipsImage *in, VipsImage **out, double sigma);
int vips_sharpen_go(VipsImage *in, VipsImage **out, double sigma);
int vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma, double sharp_sigma, int pixelate_pixels);
int vips_flatten_go(VipsImage *in, VipsImage **out, double r, double g, double b);