Class: Magick::KernelInfo

Inherits:
Object
  • Object
show all
Defined in:
ext/RMagick/rmmain.c

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(kernel_string) ⇒ Object

KernelInfo object constructor

Ruby usage:

- @verbatim KernelInfo#initialize @endverbatim

Parameters:

  • self —

    this object

  • kernel_string —

    kernel info string representation to be parsed



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# File 'ext/RMagick/rmkinfo.c', line 52

VALUE
KernelInfo_initialize(VALUE self, VALUE kernel_string)
{
  KernelInfo *kernel;

  Check_Type(kernel_string, T_STRING);

  kernel = AcquireKernelInfo(StringValueCStr(kernel_string));

  if (kernel == NULL)
    rb_raise(rb_eRuntimeError, "failed to parse kernel string");

  DATA_PTR(self) = kernel;

  return self;
}

Class Method Details

.builtin(what, geometry) ⇒ Object

Create new instance of KernelInfo with one of the ‘named’ built-in types of kernels used for special purposes such as gaussian blurring, skeleton pruning, and edge distance determination.

Ruby usage:

- @verbatim KernelInfo.builtin(kernel, geometry = nil) @endverbatim

Parameters:

  • geometry —

    geometry to pass to default kernel

Returns:

  • KernelInfo instance



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# File 'ext/RMagick/rmkinfo.c', line 230

VALUE
KernelInfo_builtin(VALUE self, VALUE what, VALUE geometry)
{
  KernelInfo *kernel;
  KernelInfoType kernel_type;
  GeometryInfo info;

  Check_Type(geometry, T_STRING);
  VALUE_TO_ENUM(what, kernel_type, KernelInfoType);
  ParseGeometry(StringValueCStr(geometry), &info);

  kernel = AcquireKernelBuiltIn(kernel_type, &info);

  if (!kernel)
    rb_raise(rb_eRuntimeError, "failed to acquire builtin kernel");

  return Data_Wrap_Struct(self, NULL, rm_kernel_info_destroy, kernel);
}

Instance Method Details

#clone ⇒ Object

Creates a new clone of the object so that its can be modified without effecting the original.

Ruby usage:

- @verbatim KernelInfo#clone @endverbatim

Parameters:

  • self —

    this object

Returns:

  • new KernelInfo instance



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# File 'ext/RMagick/rmkinfo.c', line 174

VALUE
KernelInfo_clone(VALUE self)
{
  KernelInfo *kernel = CloneKernelInfo((KernelInfo*)DATA_PTR(self));
  return Data_Wrap_Struct(Class_KernelInfo, NULL, rm_kernel_info_destroy, kernel);
}

#dup ⇒ Object

Creates a new clone of the object so that its can be modified without effecting the original.

Ruby usage:

- @verbatim KernelInfo#clone @endverbatim

Parameters:

  • self —

    this object

Returns:

  • new KernelInfo instance



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# File 'ext/RMagick/rmkinfo.c', line 174

VALUE
KernelInfo_clone(VALUE self)
{
  KernelInfo *kernel = CloneKernelInfo((KernelInfo*)DATA_PTR(self));
  return Data_Wrap_Struct(Class_KernelInfo, NULL, rm_kernel_info_destroy, kernel);
}

#scale(scale, flags) ⇒ Object

Scales the given kernel list by the given amount, with or without normalization of the sum of the kernel values (as per given flags).

Ruby usage:

- @verbatim KernelInfo#scale(scale, flags) @endverbatim

Parameters:

  • scale —

    scale to use

  • flags —

    one of Magick::NormalizeValue, Magick::CorrelateNormalizeValue, and/or Magick::PercentValue

  • self —

    this object



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# File 'ext/RMagick/rmkinfo.c', line 130

VALUE
KernelInfo_scale(VALUE self, VALUE scale, VALUE flags)
{
  GeometryFlags geoflags;

  if (!FIXNUM_P(scale))
    Check_Type(scale, T_FLOAT);

  if (rb_obj_is_instance_of(flags, Class_GeometryFlags))
    VALUE_TO_ENUM(flags, geoflags, GeometryFlags);
  else
    rb_raise(rb_eArgError, "expected Fixnum or Magick::GeometryFlags to specify flags");

  ScaleKernelInfo((KernelInfo*)DATA_PTR(self), NUM2DBL(scale), geoflags);
  return Qnil;
}

#scale_geometry(geometry) ⇒ Object

Takes a geometry argument string, typically provided as a “-set option:convolve:scale geometry” user setting, and modifies the kernel according to the parsed arguments of that setting.

Ruby usage:

- @verbatim KernelInfo#scale_geometry(geometry) @endverbatim

Parameters:

  • geometry —

    geometry string to parse and apply

  • self —

    this object



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# File 'ext/RMagick/rmkinfo.c', line 157

VALUE
KernelInfo_scale_geometry(VALUE self, VALUE geometry)
{
  Check_Type(geometry, T_STRING);
  ScaleGeometryKernelInfo((KernelInfo*)DATA_PTR(self), StringValueCStr(geometry));
  return Qnil;
}

#show ⇒ Object

Dumps KernelInfo object to stderr

Ruby usage:

- @verbatim KernelInfo#show @endverbatim

Parameters:

  • self —

    this object



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# File 'ext/RMagick/rmkinfo.c', line 111

VALUE
KernelInfo_show(VALUE self)
{
  ShowKernelInfo((KernelInfo*)DATA_PTR(self));
  return Qnil;
}

#unity_add(scale) ⇒ Object

Adds a given amount of the ‘Unity’ Convolution Kernel to the given pre-scaled and normalized Kernel.

Ruby usage:

- @verbatim KernelInfo#unity_add(scale) @endverbatim

Parameters:

  • self —

    this object

  • scale —

    scale to add



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# File 'ext/RMagick/rmkinfo.c', line 93

VALUE
KernelInfo_unity_add(VALUE self, VALUE scale)
{
  if (!FIXNUM_P(scale))
    Check_Type(scale, T_FLOAT);

  UnityAddKernelInfo((KernelInfo*)DATA_PTR(self), NUM2DBL(scale));
  return Qnil;
}

#zero_nans ⇒ Object

Zero kerne NaNs.

Ruby usage:

- @verbatim KernelInfo#zero_nans @endverbatim

Parameters:

  • self —

    this object



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# File 'ext/RMagick/rmkinfo.c', line 77

VALUE
KernelInfo_zero_nans(VALUE self)
{
  ZeroKernelNans((KernelInfo*)DATA_PTR(self));
  return Qnil;
}