Module: Magick

Defined in:
lib/rvg/rvg.rb,
lib/rvg/misc.rb,
lib/rvg/misc.rb,
lib/rvg/misc.rb,
lib/rvg/text.rb,
lib/rvg/paint.rb,
lib/rvg/units.rb,
lib/rvg/clippath.rb,
lib/rvg/pathdata.rb,
lib/rvg/stylable.rb,
lib/rvg/container.rb,
lib/rvg/deep_equal.rb,
lib/rmagick/version.rb,
lib/rvg/describable.rb,
lib/rvg/stretchable.rb,
lib/rmagick_internal.rb,
lib/rvg/embellishable.rb,
lib/rvg/transformable.rb,
ext/RMagick/rmmain.c

Overview

– $Id: transformable.rb,v 1.5 2009/02/28 23:52:28 rmagick Exp $ Copyright © 2009 Timothy P. Hunter ++

Defined Under Namespace

Modules: IPTC Classes: DestroyedImageError, Draw, Enum, FatalImageMagickError, Geometry, GeometryValue, GradientFill, HatchFill, Image, ImageList, ImageMagickError, OptionalMethodArguments, Pixel, RVG, SolidFill, TextureFill

Constant Summary collapse

VERSION = 
'2.16.5'
MIN_RUBY_VERSION = 
'2.0.0'
MIN_IM_VERSION = 
'6.4.9'
MIN_WAND_VERSION = 
'6.9.0'
PercentGeometry = 
GeometryValue.new(:PercentGeometry, 1).freeze
AspectGeometry = 
GeometryValue.new(:AspectGeometry, 2).freeze
LessGeometry = 
GeometryValue.new(:LessGeometry, 3).freeze
GreaterGeometry = 
GeometryValue.new(:GreaterGeometry, 4).freeze
AreaGeometry = 
GeometryValue.new(:AreaGeometry, 5).freeze
MinimumGeometry = 
GeometryValue.new(:MinimumGeometry, 6).freeze
MANAGED_MEMORY = 
Qfalse
AlphaChannel = 
_enum
DefaultChannels = 
_enum
HueChannel = 
_enum
LuminosityChannel = 
_enum
SaturationChannel = 
_enum
AffineMatrix = 
Class_AffineMatrix
Primary = 
Class_Primary
Chromaticity = 
Class_Chromaticity
Color = 
Class_Color
Point = 
Class_Point
Rectangle = 
Class_Rectangle
Segment = 
Class_Segment
Font = 
Class_Font
TypeMetric = 
Class_TypeMetric
Magick_version = 
str
Version = 
str
Long_version = 
str
Magick_features = 
features

Class Method Summary collapse

Class Method Details

.colors ⇒ Object

If called with the optional block, iterates over the colors, otherwise returns an array of Magick::Color objects.

Ruby usage:

- @verbatim Magick::colors @endverbatim
- @verbatim Magick::colors { |colorinfo| } @endverbatim

Notes:

- There are 3 implementations.

Parameters:

  • class —

    the class on which the method is run.

Returns:

  • either the input class (if a block was given) or the array of colors.



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# File 'ext/RMagick/rmagick.c', line 32

VALUE
Magick_colors(VALUE class)
{
    const ColorInfo **color_info_list;
    size_t number_colors, x;
    VALUE ary;
    ExceptionInfo *exception;

    exception = AcquireExceptionInfo();

    color_info_list = GetColorInfoList("*", &number_colors, exception);
    CHECK_EXCEPTION()
    (void) DestroyExceptionInfo(exception);


    if (rb_block_given_p())
    {
        for (x = 0; x < number_colors; x++)
        {
            (void) rb_yield(Import_ColorInfo(color_info_list[x]));
        }
        magick_free((void *)color_info_list);
        return class;
    }
    else
    {
        ary = rb_ary_new2((long) number_colors);
        for (x = 0; x < number_colors; x++)
        {
            (void) rb_ary_push(ary, Import_ColorInfo(color_info_list[x]));
        }

        magick_free((void *)color_info_list);
        RB_GC_GUARD(ary);
        return ary;
    }
}

.fonts ⇒ Object

If called with the optional block, iterates over the fonts, otherwise returns an array of Magick::Font objects.

Ruby usage:

- @verbatim Magick::fonts @endverbatim
- @verbatim Magick::fonts { |fontinfo| } @endverbatim

Parameters:

  • class —

    the class on which the method is run.

Returns:

  • either the input class (if a block was given) or the array of fonts.



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# File 'ext/RMagick/rmagick.c', line 82

VALUE
Magick_fonts(VALUE class)
{
    const TypeInfo **type_info;
    size_t number_types, x;
    VALUE ary;
    ExceptionInfo *exception;

    exception = AcquireExceptionInfo();
    type_info = GetTypeInfoList("*", &number_types, exception);
    CHECK_EXCEPTION()
    (void) DestroyExceptionInfo(exception);

    if (rb_block_given_p())
    {
        for (x = 0; x < number_types; x++)
        {
            (void) rb_yield(Import_TypeInfo((const TypeInfo *)type_info[x]));
        }
        magick_free((void *)type_info);
        return class;
    }
    else
    {
        ary = rb_ary_new2((long)number_types);
        for (x = 0; x < number_types; x++)
        {
            (void) rb_ary_push(ary, Import_TypeInfo((const TypeInfo *)type_info[x]));
        }
        magick_free((void *)type_info);
        RB_GC_GUARD(ary);
        return ary;
    }

}

.formats(&block) ⇒ Object 



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# File 'lib/rmagick_internal.rb', line 20

def formats(&block)
  @formats ||= init_formats

  if block_given?
    @formats.each{|k, v| yield k, v }
    self
  else
    @formats
  end
end

.init_formats ⇒ Object

Build the @@formats hash. The hash keys are image formats. The hash values specify the format “mode string”, i.e. a description of what ImageMagick can do with that format. The mode string is in the form “BRWA”, where

- "B" is "*" if the format has native blob support, or " " otherwise.
- "R" is "r" if ImageMagick can read that format, or "-" otherwise.
- "W" is "w" if ImageMagick can write that format, or "-" otherwise.
- "A" is "+" if the format supports multi-image files, or "-" otherwise.

Ruby usage:

- @verbatim Magick.init_formats @endverbatim

Notes:

- Only called once.
- There are 3 implementations.

Parameters:

  • class —

    the class on which the method is run.

Returns:

  • the formats hash.

See Also:

  • MagickInfo_to_format


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# File 'ext/RMagick/rmagick.c', line 167

VALUE
Magick_init_formats(VALUE class)
{
    const MagickInfo **magick_info;
    size_t number_formats, x;
    VALUE formats;
    ExceptionInfo *exception;

    class = class;      // defeat "never referenced" message from icc
    formats = rb_hash_new();

    // IM 6.1.3 added an exception argument to GetMagickInfoList
    exception = AcquireExceptionInfo();
    magick_info = GetMagickInfoList("*", &number_formats, exception);
    CHECK_EXCEPTION()
    (void) DestroyExceptionInfo(exception);


    for (x = 0; x < number_formats; x++)
    {
        (void) rb_hash_aset(formats
                            , rb_str_new2(magick_info[x]->name)
                            , MagickInfo_to_format((const MagickInfo *)magick_info[x]));
    }
    RB_GC_GUARD(formats);
    return formats;
}

.limit_resource(*args) ⇒ Object

Get/set resource limits. If a limit is specified the old limit is set to the new value. Either way the current/old limit is returned.

Ruby usage:

- @verbatim Magick.limit_resource(resource) @endverbatim
- @verbatim Magick.limit_resource(resource, limit) @endverbatim

Parameters:

  • argc —

    number of input arguments.

  • argv —

    array of input arguments.

  • class —

    the class on which the method is run.

Returns:

  • the current/old limit.



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# File 'ext/RMagick/rmagick.c', line 209

VALUE
Magick_limit_resource(int argc, VALUE *argv, VALUE class)
{
    VALUE resource, limit;
    ResourceType res = UndefinedResource;
    char *str;
    ID id;
    unsigned long cur_limit;

    rb_scan_args(argc, argv, "11", &resource, &limit);

    switch (TYPE(resource))
    {
        case T_NIL:
            return class;

        case T_SYMBOL:
            id = (ID)SYM2ID(resource);
            if (id == rb_intern("area"))
            {
                res = AreaResource;
            }
            else if (id == rb_intern("memory"))
            {
                res = MemoryResource;
            }
            else if (id == rb_intern("map"))
            {
                res = MapResource;
            }
            else if (id == rb_intern("disk"))
            {
                res = DiskResource;
            }
            else if (id == rb_intern("file"))
            {
                res = FileResource;
            }
            else
            {
                rb_raise(rb_eArgError, "unknown resource: `:%s'", rb_id2name(id));
            }
            break;

        default:
            str = StringValuePtr(resource);
            if (*str == '\0')
            {
                return class;
            }
            else if (rm_strcasecmp("area", str) == 0)
            {
                res = AreaResource;
            }
            else if (rm_strcasecmp("memory", str) == 0)
            {
                res = MemoryResource;
            }
            else if (rm_strcasecmp("map", str) == 0)
            {
                res = MapResource;
            }
            else if (rm_strcasecmp("disk", str) == 0)
            {
                res = DiskResource;
            }
            else if (rm_strcasecmp("file", str) == 0)
            {
                res = FileResource;
            }
            else
            {
                rb_raise(rb_eArgError, "unknown resource: `%s'", str);
            }
            break;
    }

    RB_GC_GUARD(resource);

    cur_limit = GetMagickResourceLimit(res);

    if (argc > 1)
    {
        (void) SetMagickResourceLimit(res, (MagickSizeType)NUM2ULONG(limit));
    }

    RB_GC_GUARD(limit);

    return ULONG2NUM(cur_limit);
}

.set_cache_threshold(threshold) ⇒ Object

Set the amount of free memory allocated for the pixel cache. Once this threshold is exceeded, all subsequent pixels cache operations are to/from disk.

Ruby usage:

- @verbatim Magick.set_cache_threshold(megabytes) @endverbatim

Notes:

- singleton method

Parameters:

  • class —

    the class on which the method is run.

  • threshold —

    the number of megabytes to set.

Returns:

  • the class.



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# File 'ext/RMagick/rmagick.c', line 316

VALUE
Magick_set_cache_threshold(VALUE class, VALUE threshold)
{
    unsigned long thrshld = NUM2ULONG(threshold);
    (void) SetMagickResourceLimit(MemoryResource, (MagickSizeType)thrshld);
    (void) SetMagickResourceLimit(MapResource, (MagickSizeType)(2*thrshld));
    return class;
}

.set_log_event_mask(*args) ⇒ Object

Set the log event mask.

Ruby usage:

- @verbatim Magick.set_log_event_mask(event) @endverbatim
- @verbatim Magick.set_log_event_mask(event,...) @endverbatim

Notes:

- "event" is one of
  - "all"
  - "annotate"
  - "blob"
  - "cache"
  - "coder"
  - "configure"
  - "deprecate"
  - "locale"
  - "none"
  - "render"
  - "transform"
  - "user"
  - "x11"
- Multiple events can be specified.
- Event names may be capitalized.

Parameters:

  • argc —

    number of input arguments.

  • argv —

    array of input arguments.

  • class —

    the class on which the method is run.

Returns:

  • the class.



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# File 'ext/RMagick/rmagick.c', line 356

VALUE
Magick_set_log_event_mask(int argc, VALUE *argv, VALUE class)
{
    int x;

    if (argc == 0)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (at least 1 required)");
    }
    for (x = 0; x < argc; x++)
    {
        (void) SetLogEventMask(StringValuePtr(argv[x]));
    }
    return class;
}

.set_log_format(format) ⇒ Object

Set the format for log messages.

Ruby usage:

- @verbatim Magick.set_log_format(format) @endverbatim

Notes:

- Format is a string containing one or more of:
  - %t  - current time
  - %r  - elapsed time
  - %u  - user time
  - %p  - pid
  - %m  - module (source file name)
  - %f  - function name
  - %l  - line number
  - %d  - event domain (one of the events listed above)
  - %e  - event name
  - Plus other characters, including \\n, etc.

Parameters:

  • class —

    the class on which the method is run.

  • format —

    the format to set.

Returns:

  • the class.



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# File 'ext/RMagick/rmagick.c', line 395

VALUE
Magick_set_log_format(VALUE class, VALUE format)
{
    SetLogFormat(StringValuePtr(format));
    return class;
}

.trace_proc=(p) ⇒ Object

remove reference to the proc at exit



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# File 'lib/rmagick_internal.rb', line 32

def trace_proc=(p)
  m = Mutex.new
  m.synchronize do
    if @trace_proc.nil? && !p.nil? && !@exit_block_set_up
      at_exit { @trace_proc = nil }
      @exit_block_set_up = true
    end

    @trace_proc = p
  end
end