Use VIPS_UNREF instead of g_clear_object

vips/bmp.go

@@ -56,9 +56,9 @@ func prepareBmpCanvas(width, height, bands int) (*C.VipsImage, []byte, error) {
 	return tmp, ptrToBytes(data, datalen), nil
 }
 
-func bmpClearOnPanic(img **C.VipsImage) {
+func bmpClearOnPanic(img *C.VipsImage) {
 	if rerr := recover(); rerr != nil {
-		C.clear_image(img)
+		C.unref_image(img)
 		panic(rerr)
 	}
 }
@@ -86,7 +86,7 @@ func (img *Image) decodeBmpPaletted(r io.Reader, width, height, bpp int, palette
 		return err
 	}
 
-	defer bmpClearOnPanic(&tmp)
+	defer bmpClearOnPanic(tmp)
 
 	// Each row is 4-byte aligned.
 	cap := 8 / bpp
@@ -101,7 +101,7 @@ func (img *Image) decodeBmpPaletted(r io.Reader, width, height, bpp int, palette
 
 	for y := y0; y != y1; y += yDelta {
 		if _, err = io.ReadFull(r, b); err != nil {
-			C.clear_image(&tmp)
+			C.unref_image(tmp)
 			return err
 		}
 
@@ -126,7 +126,7 @@ func (img *Image) decodeBmpPaletted(r io.Reader, width, height, bpp int, palette
 		}
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	bmpSetBitDepth(img, len(palette))
 
@@ -140,7 +140,7 @@ func (img *Image) decodeBmpRLE(r io.Reader, width, height, bpp int, palette []Co
 		return err
 	}
 
-	defer bmpClearOnPanic(&tmp)
+	defer bmpClearOnPanic(tmp)
 
 	b := make([]byte, 256)
 
@@ -156,7 +156,7 @@ Loop:
 	for {
 		b1, b2, err := readPair()
 		if err != nil {
-			C.clear_image(&tmp)
+			C.unref_image(tmp)
 			return err
 		}
 
@@ -174,7 +174,7 @@ Loop:
 			case 2:
 				dx, dy, err := readPair()
 				if err != nil {
-					C.clear_image(&tmp)
+					C.unref_image(tmp)
 					return err
 				}
 
@@ -188,7 +188,7 @@ Loop:
 
 				n := ((pixelsCount+cap-1)/cap + 1) &^ 1
 				if _, err := io.ReadFull(r, b[:n]); err != nil {
-					C.clear_image(&tmp)
+					C.unref_image(tmp)
 					return err
 				}
 
@@ -248,7 +248,7 @@ Loop:
 		}
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	bmpSetBitDepth(img, len(palette))
 
@@ -273,7 +273,7 @@ func (img *Image) decodeBmpRGB(r io.Reader, width, height, bands int, topDown, n
 		return err
 	}
 
-	defer bmpClearOnPanic(&tmp)
+	defer bmpClearOnPanic(tmp)
 
 	// Each row is 4-byte aligned.
 	b := make([]byte, (bands*width+3)&^3)
@@ -287,7 +287,7 @@ func (img *Image) decodeBmpRGB(r io.Reader, width, height, bands int, topDown, n
 
 	for y := y0; y != y1; y += yDelta {
 		if _, err = io.ReadFull(r, b); err != nil {
-			C.clear_image(&tmp)
+			C.unref_image(tmp)
 			return err
 		}
 
@@ -304,7 +304,7 @@ func (img *Image) decodeBmpRGB(r io.Reader, width, height, bands int, topDown, n
 		}
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -317,7 +317,7 @@ func (img *Image) decodeBmpRGB16(r io.Reader, width, height int, topDown, bmp565
 		return err
 	}
 
-	defer bmpClearOnPanic(&tmp)
+	defer bmpClearOnPanic(tmp)
 
 	// Each row is 4-byte aligned.
 	b := make([]byte, (2*width+3)&^3)
@@ -331,7 +331,7 @@ func (img *Image) decodeBmpRGB16(r io.Reader, width, height int, topDown, bmp565
 
 	for y := y0; y != y1; y += yDelta {
 		if _, err = io.ReadFull(r, b); err != nil {
-			C.clear_image(&tmp)
+			C.unref_image(tmp)
 			return err
 		}
 
@@ -350,7 +350,7 @@ func (img *Image) decodeBmpRGB16(r io.Reader, width, height int, topDown, bmp565
 		}
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }

vips/vips.c

@@ -15,10 +15,9 @@ vips_initialize()
 }
 
 void
-clear_image(VipsImage **in)
+unref_image(VipsImage *in)
 {
-  if (G_IS_OBJECT(*in))
-    g_clear_object(in);
+  VIPS_UNREF(in);
 }
 
 void
@@ -27,13 +26,6 @@ g_free_go(void **buf)
   g_free(*buf);
 }
 
-void
-swap_and_clear(VipsImage **in, VipsImage *out)
-{
-  clear_image(in);
-  *in = out;
-}
-
 int
 gif_resolution_limit()
 {
@@ -50,7 +42,7 @@ vips_health()
   int res = vips_black(&t[0], 4, 4, "bands", 4, NULL) ||
       !(t[1] = vips_image_copy_memory(t[0]));
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 }
@@ -142,7 +134,7 @@ vips_black_go(VipsImage **out, int width, int height, int bands)
   int res = vips_black(&tmp, width, height, "bands", bands, NULL) ||
       vips_copy(tmp, out, "interpretation", VIPS_INTERPRETATION_sRGB, NULL);
 
-  clear_image(&tmp);
+  VIPS_UNREF(tmp);
 
   return res;
 }
@@ -167,7 +159,7 @@ vips_fix_scRGB_alpha_tiff(VipsImage *in, VipsImage **out)
       vips_cast(t[2], &t[3], in->BandFmt, NULL) ||
       vips_bandjoin2(t[0], t[3], out, NULL);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 #endif
@@ -196,7 +188,7 @@ vips_fix_BW_float_tiff(VipsImage *in, VipsImage **out)
         vips_linear1(t[1], &t[2], 65535.0, 0, NULL) ||
         vips_cast_ushort(t[2], &t[3], NULL) ||
         vips_copy(t[3], &t[4], "interpretation", VIPS_INTERPRETATION_GREY16, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -212,7 +204,7 @@ vips_fix_BW_float_tiff(VipsImage *in, VipsImage **out)
       vips_bandjoin(rgb, &t[5], 3, NULL) ||
       vips_colourspace(t[5], &t[6], VIPS_INTERPRETATION_GREY16,
           "source_space", VIPS_INTERPRETATION_scRGB, NULL)) {
-    clear_image(&base);
+    VIPS_UNREF(base);
     return 1;
   }
 
@@ -225,7 +217,7 @@ vips_fix_BW_float_tiff(VipsImage *in, VipsImage **out)
   else
     res = vips_icc_remove(t[6], out);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 }
@@ -366,7 +358,7 @@ vips_resize_go(VipsImage *in, VipsImage **out, double wscale, double hscale)
       vips_unpremultiply(t[2], &t[3], NULL) ||
       vips_cast(t[3], out, format, NULL);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 }
@@ -499,7 +491,7 @@ vips_icc_import_go(VipsImage *in, VipsImage **out)
 
     if (vips_extract_band(in, &t[0], 0, "n", bands, NULL) ||
         vips_extract_band(in, &t[1], bands, "n", 1, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -508,7 +500,7 @@ vips_icc_import_go(VipsImage *in, VipsImage **out)
   }
 
   if (vips_icc_import(in, out, "embedded", TRUE, "pcs", vips_icc_get_pcs(in), NULL)) {
-    clear_image(&base);
+    VIPS_UNREF(base);
     return 1;
   }
 
@@ -521,14 +513,14 @@ vips_icc_import_go(VipsImage *in, VipsImage **out)
     if (vips_cast(t[1], &t[3], t[2]->BandFmt, NULL) ||
         vips_linear1(t[3], &t[4], 1.0 / 255.0, 0, NULL) ||
         vips_bandjoin2(t[2], t[4], out, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
   }
 
   vips_image_set_int(*out, "imgproxy-icc-imported", 1);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return 0;
 }
@@ -606,7 +598,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
     if (
         vips_premultiply(in, &t[0], NULL) ||
         vips_cast(t[0], &t[1], format, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -616,7 +608,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
 
   if (blur_sigma > 0.0) {
     if (vips_gaussblur(in, &t[2], blur_sigma, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -625,7 +617,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
 
   if (sharp_sigma > 0.0) {
     if (vips_sharpen(in, &t[3], "sigma", sharp_sigma, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -645,7 +637,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
 
     if (tw > w || th > h) {
       if (vips_embed(in, &t[4], 0, 0, tw, th, "extend", VIPS_EXTEND_MIRROR, NULL)) {
-        clear_image(&base);
+        VIPS_UNREF(base);
         return 1;
       }
 
@@ -655,7 +647,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
     if (
         vips_shrink(in, &t[5], pixelate_pixels, pixelate_pixels, NULL) ||
         vips_zoom(t[5], &t[6], pixelate_pixels, pixelate_pixels, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -663,7 +655,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
 
     if (tw > w || th > h) {
       if (vips_extract_area(in, &t[7], 0, 0, w, h, NULL)) {
-        clear_image(&base);
+        VIPS_UNREF(base);
         return 1;
       }
 
@@ -673,7 +665,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
 
   if (premultiplied) {
     if (vips_unpremultiply(in, &t[8], NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -684,7 +676,7 @@ vips_apply_filters(VipsImage *in, VipsImage **out, double blur_sigma,
       vips_colourspace(in, &t[9], interpretation, NULL) ||
       vips_cast(t[9], out, format, NULL);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 }
@@ -719,7 +711,7 @@ vips_trim(VipsImage *in, VipsImage **out, double threshold,
 
   if (vips_image_guess_interpretation(in) != VIPS_INTERPRETATION_sRGB) {
     if (vips_colourspace(in, &t[0], VIPS_INTERPRETATION_sRGB, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
     tmp = t[0];
@@ -728,7 +720,7 @@ vips_trim(VipsImage *in, VipsImage **out, double threshold,
   if (vips_image_hasalpha(tmp)) {
     RGB f_bg = { 255.0, 0, 255.0 };
     if (vips_flatten_go(tmp, &t[1], f_bg)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
     tmp = t[1];
@@ -740,7 +732,7 @@ vips_trim(VipsImage *in, VipsImage **out, double threshold,
 
   if (smart) {
     if (vips_getpoint(tmp, &img_bg, &img_bgn, 0, 0, NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
     bga = vips_array_double_new(img_bg, img_bgn);
@@ -752,7 +744,7 @@ vips_trim(VipsImage *in, VipsImage **out, double threshold,
   int left, right, top, bot, width, height, diff;
   int res = vips_find_trim(tmp, &left, &top, &width, &height, "background", bga, "threshold", threshold, NULL);
 
-  clear_image(&base);
+  VIPS_UNREF(base);
   vips_area_unref((VipsArea *) bga);
   g_free(img_bg);
 
@@ -813,11 +805,11 @@ vips_replicate_go(VipsImage *in, VipsImage **out, int width, int height, int cen
   const int top = centered ? (tmp->Ysize - height) / 2 : 0;
 
   if (vips_extract_area(tmp, out, left, top, width, height, NULL)) {
-    clear_image(&tmp);
+    VIPS_UNREF(tmp);
     return 1;
   }
 
-  clear_image(&tmp);
+  VIPS_UNREF(tmp);
 
   return 0;
 }
@@ -838,7 +830,7 @@ vips_embed_go(VipsImage *in, VipsImage **out, int x, int y, int width, int heigh
       vips_embed(in, out, x, y, width, height, "extend", VIPS_EXTEND_BLACK, NULL);
 
   if (tmp)
-    clear_image(&tmp);
+    VIPS_UNREF(tmp);
 
   return ret;
 }
@@ -862,7 +854,7 @@ vips_apply_watermark(VipsImage *in, VipsImage *watermark, VipsImage **out, int l
         vips_extract_band(watermark, &t[2], watermark->Bands - 1, "n", 1, NULL) ||
         vips_linear1(t[2], &t[3], opacity, 0, NULL) ||
         vips_bandjoin2(t[1], t[3], &t[4], NULL)) {
-      clear_image(&base);
+      VIPS_UNREF(base);
       return 1;
     }
 
@@ -877,7 +869,7 @@ vips_apply_watermark(VipsImage *in, VipsImage *watermark, VipsImage **out, int l
           "x", left, "y", top, "compositing_space", in->Type,
           NULL) ||
       vips_cast(t[5], &t[6], vips_image_get_format(in), NULL)) {
-    clear_image(&base);
+    VIPS_UNREF(base);
     return 1;
   }
 
@@ -890,7 +882,7 @@ vips_apply_watermark(VipsImage *in, VipsImage *watermark, VipsImage **out, int l
     res = vips_copy(t[6], out, NULL);
   }
 
-  clear_image(&base);
+  VIPS_UNREF(base);
 
   return res;
 }

vips/vips.go

@@ -331,6 +331,13 @@ func ptrToBytes(ptr unsafe.Pointer, size int) []byte {
 	return (*[math.MaxInt32]byte)(ptr)[:int(size):int(size)]
 }
 
+func (img *Image) swapAndUnref(newImg *C.VipsImage) {
+	if img.VipsImage != nil {
+		C.unref_image(img.VipsImage)
+	}
+	img.VipsImage = newImg
+}
+
 func (img *Image) Width() int {
 	return int(img.VipsImage.Xsize)
 }
@@ -390,11 +397,11 @@ func (img *Image) Load(imgdata *imagedata.ImageData, shrink int, scale float64,
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	if imgdata.Type == imagetype.TIFF {
 		if C.vips_fix_float_tiff(img.VipsImage, &tmp) == 0 {
-			C.swap_and_clear(&img.VipsImage, tmp)
+			img.swapAndUnref(tmp)
 		} else {
 			log.Warnf("Can't fix TIFF: %s", Error())
 		}
@@ -417,7 +424,7 @@ func (img *Image) LoadThumbnail(imgdata *imagedata.ImageData) error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -476,7 +483,8 @@ func (img *Image) Save(imgtype imagetype.Type, quality int) (*imagedata.ImageDat
 
 func (img *Image) Clear() {
 	if img.VipsImage != nil {
-		C.clear_image(&img.VipsImage)
+		C.unref_image(img.VipsImage)
+		img.VipsImage = nil
 	}
 }
 
@@ -487,7 +495,7 @@ func (img *Image) LineCache(lines int) error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -503,7 +511,7 @@ func (img *Image) Arrayjoin(in []*Image) error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -623,7 +631,7 @@ func (img *Image) CastUchar() error {
 		if C.vips_cast_go(img.VipsImage, &tmp, C.VIPS_FORMAT_UCHAR) != 0 {
 			return Error()
 		}
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	}
 
 	return nil
@@ -636,7 +644,7 @@ func (img *Image) Rad2Float() error {
 		if C.vips_rad2float_go(img.VipsImage, &tmp) != 0 {
 			return Error()
 		}
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	}
 
 	return nil
@@ -653,7 +661,7 @@ func (img *Image) Resize(wscale, hscale float64) error {
 		C.vips_image_set_int(tmp, cachedCString("imgproxy-scaled-down"), 1)
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -673,7 +681,7 @@ func (img *Image) Rotate(angle int) error {
 
 	C.vips_autorot_remove_angle(tmp)
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -684,7 +692,7 @@ func (img *Image) Flip() error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -695,7 +703,7 @@ func (img *Image) Crop(left, top, width, height int) error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -713,7 +721,7 @@ func (img *Image) SmartCrop(width, height int) error {
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -729,7 +737,7 @@ func (img *Image) Trim(threshold float64, smart bool, color Color, equalHor bool
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -739,7 +747,7 @@ func (img *Image) Flatten(bg Color) error {
 	if C.vips_flatten_go(img.VipsImage, &tmp, cRGB(bg)) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -751,7 +759,7 @@ func (img *Image) ApplyFilters(blurSigma, sharpSigma float32, pixelatePixels int
 		return Error()
 	}
 
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -771,7 +779,7 @@ func (img *Image) BackupColourProfile() {
 	var tmp *C.VipsImage
 
 	if C.vips_icc_backup(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't backup ICC profile: %s", Error())
 	}
@@ -781,7 +789,7 @@ func (img *Image) RestoreColourProfile() {
 	var tmp *C.VipsImage
 
 	if C.vips_icc_restore(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't restore ICC profile: %s", Error())
 	}
@@ -806,7 +814,7 @@ func (img *Image) ImportColourProfile() error {
 	}
 
 	if C.vips_icc_import_go(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't import ICC profile: %s", Error())
 	}
@@ -828,7 +836,7 @@ func (img *Image) ExportColourProfile() error {
 	}
 
 	if C.vips_icc_export_go(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't export ICC profile: %s", Error())
 	}
@@ -845,7 +853,7 @@ func (img *Image) ExportColourProfileToSRGB() error {
 	}
 
 	if C.vips_icc_export_srgb(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't export ICC profile: %s", Error())
 	}
@@ -864,7 +872,7 @@ func (img *Image) TransformColourProfileToSRGB() error {
 	}
 
 	if C.vips_icc_transform_srgb(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't transform ICC profile to sRGB: %s", Error())
 	}
@@ -876,7 +884,7 @@ func (img *Image) RemoveColourProfile() error {
 	var tmp *C.VipsImage
 
 	if C.vips_icc_remove(img.VipsImage, &tmp) == 0 {
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	} else {
 		log.Warningf("Can't remove ICC profile: %s", Error())
 	}
@@ -899,7 +907,7 @@ func (img *Image) Colorspace(colorspace C.VipsInterpretation) error {
 		if C.vips_colourspace_go(img.VipsImage, &tmp, colorspace) != 0 {
 			return Error()
 		}
-		C.swap_and_clear(&img.VipsImage, tmp)
+		img.swapAndUnref(tmp)
 	}
 
 	return nil
@@ -910,7 +918,7 @@ func (img *Image) CopyMemory() error {
 	if tmp = C.vips_image_copy_memory(img.VipsImage); tmp == nil {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 	return nil
 }
 
@@ -920,7 +928,7 @@ func (img *Image) Replicate(width, height int, centered bool) error {
 	if C.vips_replicate_go(img.VipsImage, &tmp, C.int(width), C.int(height), gbool(centered)) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -931,7 +939,7 @@ func (img *Image) Embed(width, height int, offX, offY int) error {
 	if C.vips_embed_go(img.VipsImage, &tmp, C.int(offX), C.int(offY), C.int(width), C.int(height)) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -942,7 +950,7 @@ func (img *Image) ApplyWatermark(wm *Image, left, top int, opacity float64) erro
 	if C.vips_apply_watermark(img.VipsImage, wm.VipsImage, &tmp, C.int(left), C.int(top), C.double(opacity)) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -953,7 +961,7 @@ func (img *Image) Strip(keepExifCopyright bool) error {
 	if C.vips_strip(img.VipsImage, &tmp, gbool(keepExifCopyright)) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }
@@ -964,7 +972,7 @@ func (img *Image) StripAll() error {
 	if C.vips_strip_all(img.VipsImage, &tmp) != 0 {
 		return Error()
 	}
-	C.swap_and_clear(&img.VipsImage, tmp)
+	img.swapAndUnref(tmp)
 
 	return nil
 }

vips/vips.h

@@ -12,11 +12,9 @@ typedef struct _RGB {
 
 int vips_initialize();
 
-void clear_image(VipsImage **in);
+void unref_image(VipsImage *in);
 void g_free_go(void **buf);
 
-void swap_and_clear(VipsImage **in, VipsImage *out);
-
 int gif_resolution_limit();
 
 int vips_health();