Method: Magick::Image#class_type=

Defined in:
ext/RMagick/rmimage.cpp

#class_type=(new_class_type) ⇒ Magick::ClassType

Change the image’s storage class.

Parameters:

  • new_class_type (Magick::ClassType) —

    the storage class

Returns:

  • (Magick::ClassType) —

    the given value



13806
13807
13808
13809
13810
13811
13812
13813
13814
13815
13816
13817
13818
13819
13820
13821
13822
13823
13824
13825
13826
13827
13828
13829
13830
13831
13832
13833
13834
13835
13836
13837
13838
13839
13840
13841
13842
13843
13844
13845
13846
13847
13848
13849
13850
13851
13852
13853
13854
13855
13856
13857
13858
13859
13860
13861
13862
13863
13864
13865
13866
 
# File 'ext/RMagick/rmimage.cpp', line 13806

VALUE
Image_class_type_eq(VALUE self, VALUE new_class_type)
{
    Image *image;
    ClassType class_type;
    QuantizeInfo qinfo;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image = rm_check_frozen(self);

    VALUE_TO_ENUM(new_class_type, class_type, ClassType);

    if (class_type == UndefinedClass)
    {
        rb_raise(rb_eArgError, "Invalid class type specified.");
    }

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
#endif

    if (image->storage_class == PseudoClass && class_type == DirectClass)
    {
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(SyncImage) args = { image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncImage), &args);
        CHECK_EXCEPTION();
#else
        GVL_STRUCT_TYPE(SyncImage) args = { image };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SyncImage), &args);
#endif
        magick_free(image->colormap);
        image->colormap = NULL;
    }
    else if (image->storage_class == DirectClass && class_type == PseudoClass)
    {
        GetQuantizeInfo(&qinfo);
        qinfo.number_colors = QuantumRange+1;
#if defined(IMAGEMAGICK_7)
        GVL_STRUCT_TYPE(QuantizeImage) args = { &qinfo, image, exception };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
        CHECK_EXCEPTION();
#else
        GVL_STRUCT_TYPE(QuantizeImage) args = { &qinfo, image };
        CALL_FUNC_WITHOUT_GVL(GVL_FUNC(QuantizeImage), &args);
#endif
    }

#if defined(IMAGEMAGICK_7)
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, class_type, exception };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    GVL_STRUCT_TYPE(SetImageStorageClass) args = { image, class_type };
    CALL_FUNC_WITHOUT_GVL(GVL_FUNC(SetImageStorageClass), &args);
#endif
    return new_class_type;
}