Fixup adding interpolate

Author: rolandlo

lua-vips-1.1-10.rockspec

@@ -33,6 +33,7 @@ build = {
        ["vips.vobject"] = "src/vips/vobject.lua",
        ["vips.voperation"] = "src/vips/voperation.lua",
        ["vips.Image"] = "src/vips/Image.lua",
-       ["vips.Image_methods"] = "src/vips/Image_methods.lua"
+       ["vips.Image_methods"] = "src/vips/Image_methods.lua",
+       ["vips.Interpolate"] = "src/vips/Interpolate.lua"
    }
 }

src/vips.lua

@@ -22,7 +22,7 @@ local vips = {
     vobject = require "vips.vobject",
     voperation = require "vips.voperation",
     Image = require "vips.Image_methods",
-    Image = require "vips.Interpolate",
+    Interpolate = require "vips.Interpolate",
 }
 
 function vips.leak_set(leak)

src/vips/Interpolate.lua

@@ -27,7 +27,7 @@ Interpolate.new_from_name = function(name)
     return Interpolate.new(interpolate)
 end
 
-return ffi.metatype("Interpolate", {
+return ffi.metatype("VipsInterpolate", {
     __index = Interpolate
 })
 

src/vips/cdefs.lua

@@ -188,6 +188,12 @@ ffi.cdef [[
         // opaque
     } VipsOperation;
 
+    typedef struct _VipsInterpolate {
+        VipsObject parent_instance;
+
+        // opaque
+    } VipsInterpolate;
+
     VipsInterpolate *vips_interpolate_new (const char *name);
 
     VipsOperation *vips_operation_new (const char *name);

src/vips/gvalue.lua

@@ -39,6 +39,7 @@ gvalue.int_arr_typeof = ffi.typeof("const int[?]")
 gvalue.double_arr_typeof = ffi.typeof("const double[?]")
 gvalue.psize_typeof = ffi.typeof("size_t[?]")
 gvalue.mem_typeof = ffi.typeof("unsigned char[?]")
+gvalue.interpolate_typeof = ffi.typeof("VipsInterpolate*")
 
 -- look up some common gtypes at init for speed
 gvalue.gbool_type = gobject_lib.g_type_from_name("gboolean")
@@ -55,6 +56,7 @@ gvalue.refstr_type = gobject_lib.g_type_from_name("VipsRefString")
 gvalue.blob_type = gobject_lib.g_type_from_name("VipsBlob")
 gvalue.band_format_type = gobject_lib.g_type_from_name("VipsBandFormat")
 gvalue.blend_mode_type = version.at_least(8, 6) and gobject_lib.g_type_from_name("VipsBlendMode") or 0
+gvalue.interpolate_type = gobject_lib.g_type_from_name("VipsInterpolate")
 
 -- gvalue.*_type can be of type cdata or number depending on the OS and Lua version
 -- gtypes as returned by vips_lib can also be of type cdata or number
@@ -155,6 +157,8 @@ gvalue.set = function(gv, value)
         else
             vips_lib.vips_value_set_blob(gv, glib_lib.g_free, buf, n)
         end
+    elseif gtype_comp == gvalue.interpolate_type then
+        gobject_lib.g_value_set_object(gv, value)
     else
         error("unsupported gtype for set " .. gvalue.type_name(gtype))
     end
@@ -249,6 +253,9 @@ gvalue.get = function(gv)
         local array = vips_lib.vips_value_get_blob(gv, psize)
 
         result = ffi.string(array, tonumber(psize[0]))
+    elseif gtype_comp == gvalue.interpolate_type then
+        local vo = gobject_lib.g_value_get_object(gv)
+        result = ffi.cast(gvalue.interpolate_typeof, vo)
     else
         error("unsupported gtype for get " .. gvalue.type_name(gtype))
     end