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.cpp

Overview

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

Defined Under Namespace

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

Constant Summary collapse

VERSION = 
'6.0.1'
MIN_RUBY_VERSION = 
'3.0.0'
MIN_IM_VERSION = 
'6.8.9'
IMAGEMAGICK_VERSION = 
Magick::Magick_version.split[1].split('-').first
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
Magick_version = 
str
Version = 
str
Long_version = 
str
Magick_features = 
features

Class Method Summary collapse

Class Method Details

.colors ⇒ Array<Magick::Color> .colors {|colorinfo| ... } ⇒ Object

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

Overloads:

  • .colors ⇒ Array<Magick::Color>

    Returns the array of Color.

    Returns:

    • (Array<Magick::Color>) —

      the array of Color

  • .colors {|colorinfo| ... } ⇒ Object

    Yields:

    • (colorinfo)

    Yield Parameters:

    • colorinfo (Magick::Color) —

      the color



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# File 'ext/RMagick/rmagick.cpp', line 42

VALUE
Magick_colors(VALUE klass)
{
    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();
    DestroyExceptionInfo(exception);


    if (rb_block_given_p())
    {
        for (x = 0; x < number_colors; x++)
        {
            rb_rescue(RESCUE_FUNC(rm_yield_body), Import_ColorInfo(color_info_list[x]), RESCUE_EXCEPTION_HANDLER_FUNC(rm_yield_handle_exception), (VALUE)color_info_list);
        }
        magick_free((void *)color_info_list);
        return klass;
    }
    else
    {
        ary = rb_ary_new2((long) number_colors);
        for (x = 0; x < number_colors; x++)
        {
            rb_ary_push(ary, Import_ColorInfo(color_info_list[x]));
        }

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

.fonts ⇒ Array<Magick::Font> .fonts {|fontinfo| ... } ⇒ Object

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

Overloads:

  • .fonts ⇒ Array<Magick::Font>

    Returns the array of Font.

    Returns:

    • (Array<Magick::Font>) —

      the array of Font

  • .fonts {|fontinfo| ... } ⇒ Object

    Yields:

    • (fontinfo)

    Yield Parameters:

    • fontinfo (Magick::Font) —

      the font



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# File 'ext/RMagick/rmagick.cpp', line 93

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

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

    if (rb_block_given_p())
    {
        for (x = 0; x < number_types; x++)
        {
            rb_rescue(RESCUE_FUNC(rm_yield_body), Import_TypeInfo((const TypeInfo *)type_info[x]), RESCUE_EXCEPTION_HANDLER_FUNC(rm_yield_handle_exception), (VALUE)type_info);
        }
        magick_free((void *)type_info);
        return klass;
    }
    else
    {
        ary = rb_ary_new2((long)number_types);
        for (x = 0; x < number_types; x++)
        {
            rb_ary_push(ary, Import_TypeInfo((const TypeInfo *)type_info[x]));
        }
        magick_free((void *)type_info);
        RB_GC_GUARD(ary);
        return ary;
    }

}

.formats ⇒ Hash .formats {|k, v| ... } ⇒ Magick

Describes the image formats supported by ImageMagick. If the optional block is present, calls the block once for each image format. The first argument, k, is the format name. The second argument, v, is the properties string described below.

  • 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.

Examples:

p Magick.formats
=> {"3FR"=>" r-+", "3G2"=>" r-+", "3GP"=>" r-+", "A"=>"*rw+",
...

Overloads:

  • .formats ⇒ Hash

    Returns the formats hash.

    Returns:

    • (Hash) —

      the formats hash

  • .formats {|k, v| ... } ⇒ Magick

    Yields:

    • (k, v)

    Yield Parameters:

    • k (String) —

      the format name

    • v (String) —

      the properties string

    Returns:



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# File 'lib/rmagick_internal.rb', line 51

def formats(&block)
  formats = init_formats

  if block
    formats.each(&block)
    self
  else
    formats
  end
end

.init_formats ⇒ Hash

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.

Returns:

  • (Hash) —

    the formats hash.



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# File 'ext/RMagick/rmagick.cpp', line 170

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

    formats = rb_hash_new();

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


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

.limit_resource(resource) ⇒ Numeric .limit_resource(resource, limit) ⇒ Numeric

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.

Overloads:

  • .limit_resource(resource) ⇒ Numeric

    Get resource limits.

    Parameters:

    • resource (String, Symbol) —

      the type of resource

  • .limit_resource(resource, limit) ⇒ Numeric

    Set resource limits.

    Parameters:

    • resource (String, Symbol) —

      the type of resource

    • limit (Numeric) —

      the new limit number

Returns:

  • (Numeric) —

    the old limit.



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# File 'ext/RMagick/rmagick.cpp', line 214

VALUE
Magick_limit_resource(int argc, VALUE *argv, VALUE klass)
{
    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 klass;

        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 if (id == rb_intern("time"))
            {
                res = TimeResource;
            }
            else
            {
                rb_raise(rb_eArgError, "unknown resource: `:%s'", rb_id2name(id));
            }
            break;

        default:
            str = StringValueCStr(resource);
            if (*str == '\0')
            {
                return klass;
            }
            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 if (rm_strcasecmp("time", str) == 0)
            {
                res = TimeResource;
            }
            else
            {
                rb_raise(rb_eArgError, "unknown resource: `%s'", str);
            }
            break;
    }

    RB_GC_GUARD(resource);

    cur_limit = GetMagickResourceLimit(res);

    if (argc > 1)
    {
        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.

Parameters:

  • threshold (Numeric) —

    the number of megabytes to set.



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# File 'ext/RMagick/rmagick.cpp', line 321

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

.set_log_event_mask(*args) ⇒ Object

Set the log event mask.

The arguments are one of:

  • “all”

  • “annotate”

  • “blob”

  • “cache”

  • “coder”

  • “configure”

  • “deprecate”

  • “locale”

  • “none”

  • “render”

  • “transform”

  • “user”

  • “x11”

Multiple events can be specified as the aruments. Event names may be capitalized.

Parameters:

  • args (String) —

    the mask of log event.



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# File 'ext/RMagick/rmagick.cpp', line 354

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

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

.set_log_format(format) ⇒ Object

Set the format for log messages.

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:

  • format (String) —

    the format to set.



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# File 'ext/RMagick/rmagick.cpp', line 388

VALUE
Magick_set_log_format(VALUE klass, VALUE format)
{
    SetLogFormat(StringValueCStr(format));
    return klass;
}