Save GIF with vips_gifsave_buffer

CHANGELOG.md

@@ -1,6 +1,8 @@
 # Changelog
 
 ## [Unreleased]
+### Change
+- Save GIFs without ImageMagick (vips 8.12+ required).
 
 ## [3.0.0.beta2] - 2021-11-15
 ### Added

vips/vips.c

@@ -15,6 +15,9 @@
 #define VIPS_SUPPORT_PNG_BITDEPTH \
   (VIPS_MAJOR_VERSION > 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION >= 10))
 
+#define VIPS_SUPPORT_GIFSAVE \
+  (VIPS_MAJOR_VERSION > 8 || (VIPS_MAJOR_VERSION == 8 && VIPS_MINOR_VERSION >= 12))
+
 int
 vips_initialize() {
   return vips_init("imgproxy");
@@ -617,7 +620,12 @@ vips_webpsave_go(VipsImage *in, void **buf, size_t *len, int quality) {
 
 int
 vips_gifsave_go(VipsImage *in, void **buf, size_t *len) {
-  return vips_magicksave_buffer(in, buf, len, "format", "gif", NULL);
+#if VIPS_SUPPORT_GIFSAVE
+  return vips_gifsave_buffer(in, buf, len, NULL);
+#else
+  vips_error("vips_gifsave_go", "Saving GIF is not supported (libvips 8.12+ reuired)");
+  return 1;
+#endif
 }
 
 int

vips/vips.go

@@ -169,7 +169,7 @@ func SupportsSave(it imagetype.Type) bool {
 	case imagetype.WEBP:
 		sup = hasOperation("webpsave_buffer")
 	case imagetype.GIF:
-		sup = hasOperation("magicksave_buffer")
+		sup = hasOperation("gifsave_buffer")
 	case imagetype.AVIF:
 		sup = hasOperation("heifsave_buffer")
 	case imagetype.BMP: