Module: Magick

Defined in:
lib/RMagick.rb,
ext/RMagick/rmmain.c

Defined Under Namespace

Classes: Draw, Enum, Geometry, GeometryValue, GradientFill, HatchFill, Image, ImageList, ImageMagickError, Pixel, TextureFill

Constant Summary collapse

PercentGeometry = 
GeometryValue.new(:PercentGeometry, 1)
AspectGeometry = 
GeometryValue.new(:AspectGeometry, 2)
LessGeometry = 
GeometryValue.new(:LessGeometry, 3)
GreaterGeometry = 
GeometryValue.new(:GreaterGeometry, 4)
AreaGeometry = 
GeometryValue.new(:AreaGeometry, 5)
MaxRGB =

Miscellaneous constants

INT2FIX(MaxRGB)
QuantumDepth = 
INT2FIX(QuantumDepth)
AffineMatrix = 
Class_AffineMatrix
Statistics = 
Class_Statistics
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 = 
rb_str_new2(mgk_version)
Version = 
rb_str_new2(PACKAGE_STRING)
Long_version = 
rb_str_new2(long_version)
@@formats = 
nil

Class Method Summary collapse

Class Method Details

.colors ⇒ Object

Method: Magick::colors [ { |colorinfo| } ] Purpose: If called with the optional block, iterates over the colors,

otherwise returns an array of Magick::Color objects

Notes: There are 3 implementations



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

VALUE
Magick_colors(VALUE class)
{
#if defined(HAVE_GETCOLORINFOARRAY) // GraphicsMagick
    ColorInfo **color_ary;
    ExceptionInfo exception;
    volatile VALUE ary;
    int x;

    GetExceptionInfo(&exception);

    color_ary = GetColorInfoArray(&exception);
    HANDLE_ERROR

    if (rb_block_given_p())
    {
        x = 0;
        while(color_ary[x])
        {
            rb_yield(Color_from_ColorInfo(color_ary[x]));
            x += 1;
        }
        magick_free(color_ary);
        return class;
    }
    else
    {
        ary = rb_ary_new();

        x = 0;
        while (color_ary[x])
        {
            rb_ary_push(ary, Color_from_ColorInfo(color_ary[x]));
            x += 1;
        }
        magick_free(color_ary);
        return ary;
    }

#elif defined(HAVE_GETCOLORINFOLIST)    // ImageMagick 6.0.0

    const ColorInfo **color_info_list;
    unsigned long number_colors, x;
    volatile VALUE ary;

#if defined(HAVE_OLD_GETCOLORINFOLIST)
    color_info_list = GetColorInfoList("*", &number_colors);

#else
    // IM 6.1.3 added an exception parm to GetColorInfoList
    ExceptionInfo exception;

    GetExceptionInfo(&exception);

    color_info_list = GetColorInfoList("*", &number_colors, &exception);
    HANDLE_ERROR
#endif


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

        magick_free(color_info_list);
        return ary;
    }

#else   // ImageMagick < 6.0.0

    const ColorInfo *color_list;
    ColorInfo *color;
    ExceptionInfo exception;
    volatile VALUE ary, el;

    GetExceptionInfo(&exception);

    color_list = GetColorInfo("*", &exception);
    DestroyExceptionInfo(&exception);

    // The order of the colors list can change in mid-iteration,
    // so the only way we can guarantee a single pass thru the list
    // is to copy the elements into an array without returning to
    // IM. So, we always create a Ruby array and either return it
    // or iterate over it.
    ary = rb_ary_new();
    for (color = (ColorInfo *)color_list; color; color = color->next)
    {
        rb_ary_push(ary, Color_from_ColorInfo(color));
    }

    // If block, iterate over colors
    if (rb_block_given_p())
    {
        while ((el = rb_ary_shift(ary)) != Qnil)
        {
            rb_yield(el);
        }
        return class;
    }
    else
    {
        return ary;
    }

#endif
}

.fonts ⇒ Object

Method: Magick::fonts [ { |fontinfo| } ] Purpose: If called with the optional block, iterates over the fonts,

otherwise returns an array of Magick::Font objects



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

VALUE
Magick_fonts(VALUE class)
{
#if defined(HAVE_GETTYPEINFOLIST)   // ImageMagick 6.0.0

    const TypeInfo **type_info;
    unsigned long number_types, x;
    volatile VALUE ary;

#if defined(HAVE_OLD_GETTYPEINFOLIST)
    type_info = GetTypeInfoList("*", &number_types);

#else
    // IM 6.1.3 added an exception argument to GetTypeInfoList
    ExceptionInfo exception;

    GetExceptionInfo(&exception);
    type_info = GetTypeInfoList("*", &number_types, &exception);
    HANDLE_ERROR
#endif

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

#else

    const TypeInfo *type_list;
    TypeInfo *type, *next;
    ExceptionInfo exception;
    volatile VALUE ary;

    GetExceptionInfo(&exception);

    type_list = GetTypeInfo("*", &exception);
    HANDLE_ERROR

    // If block, iterate over fonts
    if (rb_block_given_p())
    {
        for (type = (TypeInfo *)type_list; type; type = next)
        {
            next = type->next;  // Protect against recursive calls to GetTypeInfo
            if (! type->stealth)
            {
                rb_yield(Font_from_TypeInfo(type));
            }
        }

        return class;
    }
    else
    {
        ary = rb_ary_new();
        for (type = (TypeInfo *)type_list; type; type = type->next)
        {
            rb_ary_push(ary, Font_from_TypeInfo(type));
        }
        return ary;
    }

#endif
}

.formats(&block) ⇒ Object 



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# File 'lib/RMagick.rb', line 16

def Magick.formats(&block)
    @@formats ||= Magick.init_formats
    if block_given?
        @@formats.each { |k,v| yield(k,v) }
        self
    else
        @@formats
    end
end

.init_formats ⇒ Object 



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# File 'ext/RMagick/rmmain.c', line 266

VALUE
Magick_init_formats(VALUE class)
{
#if defined(HAVE_GETMAGICKINFOARRAY)    // GraphicsMagick

    MagickInfo *magick_info, *m;
    volatile VALUE formats;
    ExceptionInfo exception;

    class = class;      // defeat "never referenced" message from icc

    formats = rb_hash_new();

    GetExceptionInfo(&exception);
    magick_info = (MagickInfo *)GetMagickInfoArray(&exception);
    for(m = magick_info; m != NULL; m = m->next)
    {
        rb_hash_aset(formats, rb_str_new2(m->name), MagickInfo_to_format(m));
    }

    magick_free(magick_info);
    return formats;

#elif defined(HAVE_GETMAGICKINFOLIST)    // ImageMagick 6.0.0

    const MagickInfo **magick_info;
    unsigned long number_formats, x;
    volatile VALUE formats;
#if !defined(HAVE_OLD_GETMAGICKINFOLIST)
    ExceptionInfo exception;
#endif

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

#if defined(HAVE_OLD_GETMAGICKINFOLIST)
    magick_info = GetMagickInfoList("*", &number_formats);

#else
    // IM 6.1.3 added an exception argument to GetMagickInfoList
    GetExceptionInfo(&exception);
    magick_info = GetMagickInfoList("*", &number_formats, &exception);
    HANDLE_ERROR
#endif

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

#else

    MagickInfo *m;
    volatile VALUE formats;
    ExceptionInfo exception;

    class = class;      // defeat "never referenced" message from icc

    formats = rb_hash_new();

    GetExceptionInfo(&exception);
    m = (MagickInfo *)GetMagickInfo("*", &exception);
    HANDLE_ERROR

    for ( ; m != NULL; m = m->next)
    {
        rb_hash_aset(formats, rb_str_new2(m->name), MagickInfo_to_format(m));
    }

    return formats;

#endif
}

.set_cache_threshold(threshold) ⇒ Object

Method Magick.set_cache_threshold(megabytes) Purpose: sets the amount of free memory allocated for the

pixel cache.  Once this threshold is exceeded, all
subsequent pixels cache operations are to/from disk.

Notes: singleton method

Pre-5.5.1 this method called the SetCacheThreshold
function, which is deprecated in 5.5.1.



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# File 'ext/RMagick/rmmain.c', line 420

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

.set_log_event_mask(*args) ⇒ Object

Method: Magick.set_log_event_mask(event,…) -> Magick 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.



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# File 'ext/RMagick/rmmain.c', line 436

static 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(STRING_PTR(argv[x]));
    }
    return class;
}

.set_log_format(format) ⇒ Object

Method: Magick.set_log_format(format) -> Magick 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.



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# File 'ext/RMagick/rmmain.c', line 466

static VALUE
Magick_set_log_format(VALUE class, VALUE format)
{
#ifdef HAVE_SETLOGFORMAT
    SetLogFormat(STRING_PTR(format));
    return class;
#else
    rm_not_implemented();
    return (VALUE)0;
#endif
}

.set_monitor(monitor) ⇒ Object

Method: Magick.set_monitor(&monitor) Purpose: Establish MagickMonitor exit Notes: use nil argument to turn off monitoring



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# File 'ext/RMagick/rmmain.c', line 379

static VALUE
Magick_set_monitor(VALUE class, VALUE monitor)
{

    // 1st time: establish ID, define @@__MAGICK_MONITOR__
    // class variable, stow monitor VALUE in it.
    if (!Magick_Monitor)
    {
        Magick_Monitor = rb_intern(MAGICK_MONITOR_CVAR);
        rb_define_class_variable(Module_Magick, MAGICK_MONITOR_CVAR, monitor);
        ID_call = rb_intern("call");
    }

    // If nil, turn off monitoring.
    if (monitor == Qnil)
    {
        (void) SetMonitorHandler(NULL);
    }
    else
    // Otherwise, store monitor in @@__MAGICK_MONITOR__
    {
        // 1.8.0 deletes rb_cvar_declare and adds another
        // parm to rb_cvar_set - if rb_cvar_declare is
        // available, use the 3-parm version of rb_cvar_set.
        RUBY18(rb_cvar_set(Module_Magick, Magick_Monitor, monitor, 0);)
        RUBY16(rb_cvar_set(Module_Magick, Magick_Monitor, monitor);)
        (void) SetMonitorHandler(&monitor_handler);
    }

    return class;
}