Class: Magick::Draw

Inherits:
Object
  • Object
show all
Defined in:
lib/rmagick_internal.rb,
ext/RMagick/rmmain.c

Constant Summary collapse

ALIGN_TYPE_NAMES =

Thse hashes are used to map Magick constant values to the strings used in the primitives.

{
  LeftAlign.to_i => 'left',
  RightAlign.to_i => 'right',
  CenterAlign.to_i => 'center'
}.freeze
ANCHOR_TYPE_NAMES = 
{
  StartAnchor.to_i => 'start',
  MiddleAnchor.to_i => 'middle',
  EndAnchor.to_i => 'end'
}.freeze
DECORATION_TYPE_NAMES = 
{
  NoDecoration.to_i => 'none',
  UnderlineDecoration.to_i => 'underline',
  OverlineDecoration.to_i => 'overline',
  LineThroughDecoration.to_i => 'line-through'
}.freeze
FONT_WEIGHT_NAMES = 
{
  AnyWeight.to_i => 'all',
  NormalWeight.to_i => 'normal',
  BoldWeight.to_i => 'bold',
  BolderWeight.to_i => 'bolder',
  LighterWeight.to_i => 'lighter'
}.freeze
GRAVITY_NAMES = 
{
  NorthWestGravity.to_i => 'northwest',
  NorthGravity.to_i => 'north',
  NorthEastGravity.to_i => 'northeast',
  WestGravity.to_i => 'west',
  CenterGravity.to_i => 'center',
  EastGravity.to_i => 'east',
  SouthWestGravity.to_i => 'southwest',
  SouthGravity.to_i => 'south',
  SouthEastGravity.to_i => 'southeast'
}.freeze
PAINT_METHOD_NAMES = 
{
  PointMethod.to_i => 'point',
  ReplaceMethod.to_i => 'replace',
  FloodfillMethod.to_i => 'floodfill',
  FillToBorderMethod.to_i => 'filltoborder',
  ResetMethod.to_i => 'reset'
}.freeze
STRETCH_TYPE_NAMES = 
{
  NormalStretch.to_i => 'normal',
  UltraCondensedStretch.to_i => 'ultra-condensed',
  ExtraCondensedStretch.to_i => 'extra-condensed',
  CondensedStretch.to_i => 'condensed',
  SemiCondensedStretch.to_i => 'semi-condensed',
  SemiExpandedStretch.to_i => 'semi-expanded',
  ExpandedStretch.to_i => 'expanded',
  ExtraExpandedStretch.to_i => 'extra-expanded',
  UltraExpandedStretch.to_i => 'ultra-expanded',
  AnyStretch.to_i => 'all'
}.freeze
STYLE_TYPE_NAMES = 
{
  NormalStyle.to_i => 'normal',
  ItalicStyle.to_i => 'italic',
  ObliqueStyle.to_i => 'oblique',
  AnyStyle.to_i => 'all'
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Magick::Draw

Initialize Draw object.



1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
 
# File 'ext/RMagick/rmdraw.c', line 1202

VALUE
Draw_initialize(VALUE self)
{
    Draw *draw, *draw_options;
    VALUE options;

    Data_Get_Struct(self, Draw, draw);

    options = new_DrawOptions();
    Data_Get_Struct(options, Draw, draw_options);
    draw->info = draw_options->info;
    draw_options->info = NULL;

    RB_GC_GUARD(options);

    return self;
}

Instance Method Details

#affine(sx, rx, ry, sy, tx, ty) ⇒ Object

Apply coordinate transformations to support scaling (s), rotation ®, and translation (t). Angles are specified in radians.



280
281
282
 
# File 'lib/rmagick_internal.rb', line 280

def affine(sx, rx, ry, sy, tx, ty)
  primitive 'affine ' + sprintf('%g,%g,%g,%g,%g,%g', sx, rx, ry, sy, tx, ty)
end

#affine=(matrix) ⇒ Magick::AffineMatrix

Set the affine matrix from an AffineMatrix.

Parameters:

  • matrix (Magick::AffineMatrix) —

    the affine matrix

Returns:

  • (Magick::AffineMatrix) —

    the given matrix



35
36
37
38
39
40
41
42
43
44
 
# File 'ext/RMagick/rmdraw.c', line 35

VALUE
Draw_affine_eq(VALUE self, VALUE matrix)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    Export_AffineMatrix(&draw->info->affine, matrix);
    return matrix;
}

#align=(align) ⇒ Magick::AlignType

Set the text alignment from an AlignType.

Parameters:

  • align (Magick::AlignType) —

    the text alignment

Returns:

  • (Magick::AlignType) —

    the given align



53
54
55
56
57
58
59
60
61
62
 
# File 'ext/RMagick/rmdraw.c', line 53

VALUE
Draw_align_eq(VALUE self, VALUE align)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    VALUE_TO_ENUM(align, draw->info->align, AlignType);
    return align;
}

#alpha(x, y, method) ⇒ Object

Set alpha (make transparent) in image according to the specified colorization rule



286
287
288
289
290
 
# File 'lib/rmagick_internal.rb', line 286

def alpha(x, y, method)
  Kernel.raise ArgumentError, 'Unknown paint method' unless PAINT_METHOD_NAMES.key?(method.to_i)
  name = Gem::Version.new(Magick::IMAGEMAGICK_VERSION) > Gem::Version.new('7.0.0') ? 'alpha ' : 'matte '
  primitive name + sprintf('%g,%g, %s', x, y, PAINT_METHOD_NAMES[method.to_i])
end

#annotate(image_arg, width_arg, height_arg, x_arg, y_arg, text) ⇒ Magick::Draw

Annotates an image with text.

  • Additional Draw attribute methods may be called in the optional block, which is executed in the context of an Draw object.

Parameters:

  • image_arg (Magick::Image, Magick::ImageList) —

    Either an imagelist or an image. If an imagelist, uses the current image.

  • width_arg (Numeric) —

    the width

  • height_arg (Numeric) —

    the height

  • x_arg (Numeric) —

    x position

  • y_arg (Numeric) —

    y position

  • text (String) —

    the annotation text

Returns:



824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
 
# File 'ext/RMagick/rmdraw.c', line 824

VALUE Draw_annotate(
                   VALUE self,
                   VALUE image_arg,
                   VALUE width_arg,
                   VALUE height_arg,
                   VALUE x_arg,
                   VALUE y_arg,
                   VALUE text)
{
    Draw *draw;
    Image *image;
    unsigned long width, height;
    long x, y;
    AffineMatrix keep;
    char geometry_str[100];
    char *embed_text;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    // Save the affine matrix in case it is modified by
    // Draw#rotation=
    Data_Get_Struct(self, Draw, draw);
    keep = draw->info->affine;

    image_arg = rm_cur_image(image_arg);
    image = rm_check_frozen(image_arg);

    // If we have an optional parm block, run it in self's context,
    // allowing the app a chance to modify the object's attributes
    if (rb_block_given_p())
    {
        if (rb_proc_arity(rb_block_proc()) == 0)
        {
            // Run the block in self's context
            rb_obj_instance_eval(0, NULL, self);
        }
        else
        {
            rb_yield(self);
        }
    }

    // Translate & store in Draw structure
    embed_text = StringValueCStr(text);
#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    draw->info->text = InterpretImageProperties(NULL, image, embed_text, exception);
    if (rm_should_raise_exception(exception, RetainExceptionRetention))
    {
        if (draw->info->text)
        {
            magick_free(draw->info->text);
        }
        rm_raise_exception(exception);
    }
#else
    draw->info->text = InterpretImageProperties(NULL, image, embed_text);
#endif
    if (!draw->info->text)
    {
#if defined(IMAGEMAGICK_7)
        DestroyExceptionInfo(exception);
#endif
        rb_raise(rb_eArgError, "no text");
    }

    // Create geometry string, copy to Draw structure, overriding
    // any previously existing value.
    width  = NUM2ULONG(width_arg);
    height = NUM2ULONG(height_arg);
    x      = NUM2LONG(x_arg);
    y      = NUM2LONG(y_arg);

    if (width == 0 && height == 0)
    {
        snprintf(geometry_str, sizeof(geometry_str), "%+ld%+ld", x, y);
    }

    // WxH is non-zero
    else
    {
        snprintf(geometry_str, sizeof(geometry_str), "%lux%lu%+ld%+ld", width, height, x, y);
    }

    magick_clone_string(&draw->info->geometry, geometry_str);

#if defined(IMAGEMAGICK_7)
    AnnotateImage(image, draw->info, exception);
#else
    AnnotateImage(image, draw->info);
#endif

    magick_free(draw->info->text);
    draw->info->text = NULL;
    draw->info->affine = keep;

#if defined(IMAGEMAGICK_7)
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#arc(start_x, start_y, end_x, end_y, start_degrees, end_degrees) ⇒ Object

Draw an arc.



293
294
295
296
297
298
 
# File 'lib/rmagick_internal.rb', line 293

def arc(start_x, start_y, end_x, end_y, start_degrees, end_degrees)
  primitive 'arc ' + sprintf(
    '%g,%g %g,%g %g,%g',
    start_x, start_y, end_x, end_y, start_degrees, end_degrees
  )
end

#bezier(*points) ⇒ Object

Draw a bezier curve.



301
302
303
304
305
306
307
308
 
# File 'lib/rmagick_internal.rb', line 301

def bezier(*points)
  if points.length.zero?
    Kernel.raise ArgumentError, 'no points specified'
  elsif points.length.odd?
    Kernel.raise ArgumentError, 'odd number of arguments specified'
  end
  primitive 'bezier ' + points.map! { |x| sprintf('%g', x) }.join(',')
end

#circle(origin_x, origin_y, perim_x, perim_y) ⇒ Object

Draw a circle



311
312
313
 
# File 'lib/rmagick_internal.rb', line 311

def circle(origin_x, origin_y, perim_x, perim_y)
  primitive 'circle ' + sprintf('%g,%g %g,%g', origin_x, origin_y, perim_x, perim_y)
end

#clip_path(name) ⇒ Object

Invoke a clip-path defined by def_clip_path.



316
317
318
 
# File 'lib/rmagick_internal.rb', line 316

def clip_path(name)
  primitive "clip-path #{name}"
end

#clip_rule(rule) ⇒ Object

Define the clipping rule.



321
322
323
324
 
# File 'lib/rmagick_internal.rb', line 321

def clip_rule(rule)
  Kernel.raise ArgumentError, "Unknown clipping rule #{rule}" unless %w[evenodd nonzero].include?(rule.downcase)
  primitive "clip-rule #{rule}"
end

#clip_units(unit) ⇒ Object

Define the clip units



327
328
329
330
 
# File 'lib/rmagick_internal.rb', line 327

def clip_units(unit)
  Kernel.raise ArgumentError, "Unknown clip unit #{unit}" unless %w[userspace userspaceonuse objectboundingbox].include?(unit.downcase)
  primitive "clip-units #{unit}"
end

#clone ⇒ Magick::Draw

Clones this object.

Returns:



937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
 
# File 'ext/RMagick/rmdraw.c', line 937

VALUE
Draw_clone(VALUE self)
{
    VALUE clone;

    clone = Draw_dup(self);
    if (OBJ_FROZEN(self))
    {
        OBJ_FREEZE(clone);
    }

    RB_GC_GUARD(clone);

    return clone;
}

#color(x, y, method) ⇒ Object

Set color in image according to specified colorization rule. Rule is one of point, replace, floodfill, filltoborder,reset



334
335
336
337
 
# File 'lib/rmagick_internal.rb', line 334

def color(x, y, method)
  Kernel.raise ArgumentError, "Unknown PaintMethod: #{method}" unless PAINT_METHOD_NAMES.key?(method.to_i)
  primitive 'color ' + sprintf('%g,%g,%s', x, y, PAINT_METHOD_NAMES[method.to_i])
end

#composite(x, y, width, height, image) ⇒ Magick::Draw #composite(x, y, width, height, image, operator = Magick::OverCompositeOp) ⇒ Magick::Draw

Draw the image.

Overloads:

  • #composite(x, y, width, height, image) ⇒ Magick::Draw

    Parameters:

    • x (Float) —

      x position

    • y (Float) —

      y position

    • width (Float) —

      the width

    • height (Float) —

      the height

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

  • #composite(x, y, width, height, image, operator = Magick::OverCompositeOp) ⇒ Magick::Draw

    • The “image” argument can be either an ImageList object or an Image argument.

    Parameters:

    • x (Float) —

      x position

    • y (Float) —

      y position

    • width (Float) —

      the width

    • height (Float) —

      the height

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • operator (Magick::CompositeOperator) (defaults to: Magick::OverCompositeOp) —

      the operator

Returns:



978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
 
# File 'ext/RMagick/rmdraw.c', line 978

VALUE
Draw_composite(int argc, VALUE *argv, VALUE self)
{
    Draw *draw;
    const char *op;
    double x, y, width, height;
    CompositeOperator cop;
    VALUE image;
    Image *comp_img;
    struct TmpFile_Name *tmpfile_name;
    char name[MaxTextExtent];
    // Buffer for "image" primitive
    char primitive[MaxTextExtent];

    if (argc < 5 || argc > 6)
    {
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 5 or 6)", argc);
    }

    // Retrieve the image to composite
    image = rm_cur_image(argv[4]);
    comp_img = rm_check_destroyed(image);

    x = NUM2DBL(argv[0]);
    y = NUM2DBL(argv[1]);
    width  = NUM2DBL(argv[2]);
    height = NUM2DBL(argv[3]);

    cop = OverCompositeOp;
    if (argc == 6)
    {
        VALUE_TO_ENUM(argv[5], cop, CompositeOperator);
    }

    op = CommandOptionToMnemonic(MagickComposeOptions, cop);
    if (rm_strcasecmp("Unrecognized", op) == 0)
    {
        rb_raise(rb_eArgError, "unknown composite operator (%d)", cop);
    }

    Data_Get_Struct(self, Draw, draw);

    // Create a temp copy of the composite image
    rm_write_temp_image(comp_img, name, sizeof(name));

    // Add the temp filename to the filename array.
    // Use Magick storage since we need to keep the list around
    // until destroy_Draw is called.
    tmpfile_name = magick_malloc(sizeof(struct TmpFile_Name) + rm_strnlen_s(name, sizeof(name)));
    strcpy(tmpfile_name->name, name);
    tmpfile_name->next = draw->tmpfile_ary;
    draw->tmpfile_ary = tmpfile_name;

    // Form the drawing primitive
    snprintf(primitive, sizeof(primitive), "image %s %g,%g,%g,%g '%s'", op, x, y, width, height, name);


    // Send "primitive" to self.
    rb_funcall(self, rb_intern("primitive"), 1, rb_str_new2(primitive));

    RB_GC_GUARD(image);

    return self;
}

#decorate(decoration) ⇒ Object

Specify EITHER the text decoration (none, underline, overline, line-through) OR the text solid background color (any color name or spec)



341
342
343
344
345
346
347
 
# File 'lib/rmagick_internal.rb', line 341

def decorate(decoration)
  if DECORATION_TYPE_NAMES.key?(decoration.to_i)
    primitive "decorate #{DECORATION_TYPE_NAMES[decoration.to_i]}"
  else
    primitive "decorate #{enquote(decoration)}"
  end
end

#decorate=(decorate) ⇒ Magick::DecorationType

Set text decorate from an Magick::DecorationType.

Parameters:

  • decorate (Magick::DecorationType) —

    the decorate type

Returns:

  • (Magick::DecorationType) —

    the given decorate



71
72
73
74
75
76
77
78
79
80
 
# File 'ext/RMagick/rmdraw.c', line 71

VALUE
Draw_decorate_eq(VALUE self, VALUE decorate)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    VALUE_TO_ENUM(decorate, draw->info->decorate, DecorationType);
    return decorate;
}

#define_clip_path(name) ⇒ Object

Define a clip-path. A clip-path is a sequence of primitives bracketed by the “push clip-path <name>” and “pop clip-path” primitives. Upon advice from the IM guys, we also bracket the clip-path primitives with “push(pop) defs” and “push (pop) graphic-context”.



354
355
356
357
358
359
360
361
362
363
 
# File 'lib/rmagick_internal.rb', line 354

def define_clip_path(name)
  push('defs')
  push("clip-path \"#{name}\"")
  push('graphic-context')
  yield
ensure
  pop('graphic-context')
  pop('clip-path')
  pop('defs')
end

#density=(density) ⇒ String

Set density.

Parameters:

  • density (String) —

    the density

Returns:

  • (String) —

    the given density



89
90
91
92
93
94
95
96
97
98
99
 
# File 'ext/RMagick/rmdraw.c', line 89

VALUE
Draw_density_eq(VALUE self, VALUE density)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    magick_clone_string(&draw->info->density, StringValueCStr(density));

    return density;
}

#draw(image_arg) ⇒ Magick::Draw

Execute the stored drawing primitives on the current image.

Parameters:

Returns:



1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
 
# File 'ext/RMagick/rmdraw.c', line 1051

VALUE
Draw_draw(VALUE self, VALUE image_arg)
{
    Draw *draw;
    Image *image;
#if defined(IMAGEMAGICK_7)
    ExceptionInfo *exception;
#endif

    image_arg = rm_cur_image(image_arg);
    image = rm_check_frozen(image_arg);

    Data_Get_Struct(self, Draw, draw);
    if (draw->primitives == 0)
    {
        rb_raise(rb_eArgError, "nothing to draw");
    }

    // Point the DrawInfo structure at the current set of primitives.
    magick_clone_string(&(draw->info->primitive), StringValueCStr(draw->primitives));

#if defined(IMAGEMAGICK_7)
    exception = AcquireExceptionInfo();
    DrawImage(image, draw->info, exception);
#else
    DrawImage(image, draw->info);
#endif

    magick_free(draw->info->primitive);
    draw->info->primitive = NULL;

#if defined(IMAGEMAGICK_7)
    CHECK_EXCEPTION();
    DestroyExceptionInfo(exception);
#else
    rm_check_image_exception(image, RetainOnError);
#endif

    return self;
}

#dup ⇒ Magick::Draw

Duplicate a Draw object.

  • Constructs a new Draw object, then calls initialize_copy.

Returns:



1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
 
# File 'ext/RMagick/rmdraw.c', line 1100

VALUE
Draw_dup(VALUE self)
{
    Draw *draw;
    VALUE dup;

    draw = ALLOC(Draw);
    memset(draw, 0, sizeof(Draw));
    dup = Data_Wrap_Struct(CLASS_OF(self), mark_Draw, destroy_Draw, draw);
    RB_GC_GUARD(dup);

    return rb_funcall(dup, rm_ID_initialize_copy, 1, self);
}

#ellipse(origin_x, origin_y, width, height, arc_start, arc_end) ⇒ Object

Draw an ellipse



366
367
368
369
370
371
 
# File 'lib/rmagick_internal.rb', line 366

def ellipse(origin_x, origin_y, width, height, arc_start, arc_end)
  primitive 'ellipse ' + sprintf(
    '%g,%g %g,%g %g,%g',
    origin_x, origin_y, width, height, arc_start, arc_end
  )
end

#encoding(encoding) ⇒ Object

Let anything through, but the only defined argument is “UTF-8”. All others are apparently ignored.



375
376
377
 
# File 'lib/rmagick_internal.rb', line 375

def encoding(encoding)
  primitive "encoding #{encoding}"
end

#encoding=(encoding) ⇒ String

Set text encoding.

Parameters:

  • encoding (String) —

    the encoding name

Returns:

  • (String) —

    the given encoding name



108
109
110
111
112
113
114
115
116
117
118
 
# File 'ext/RMagick/rmdraw.c', line 108

VALUE
Draw_encoding_eq(VALUE self, VALUE encoding)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    magick_clone_string(&draw->info->encoding, StringValueCStr(encoding));

    return encoding;
}

#fill(colorspec) ⇒ Object Also known as: fill_color, fill_pattern

Specify object fill, a color name or pattern name



380
381
382
 
# File 'lib/rmagick_internal.rb', line 380

def fill(colorspec)
  primitive "fill #{enquote(colorspec)}"
end

#fill=(fill) ⇒ Magick::Pixel, String

Set fill color.

Parameters:

Returns:



127
128
129
130
131
132
133
134
135
136
 
# File 'ext/RMagick/rmdraw.c', line 127

VALUE
Draw_fill_eq(VALUE self, VALUE fill)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    Color_to_PixelColor(&draw->info->fill, fill);
    return fill;
}

#fill_opacity(opacity) ⇒ Object

Specify fill opacity (use “xx%” to indicate percentage)



387
388
389
390
 
# File 'lib/rmagick_internal.rb', line 387

def fill_opacity(opacity)
  check_opacity(opacity)
  primitive "fill-opacity #{opacity}"
end

#fill_pattern=(pattern) ⇒ Magick::Image

Accept an image as a fill pattern.

Parameters:

Returns:

See Also:



148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
 
# File 'ext/RMagick/rmdraw.c', line 148

VALUE
Draw_fill_pattern_eq(VALUE self, VALUE pattern)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);

    if (draw->info->fill_pattern != NULL)
    {
        // Do not trace destruction
        DestroyImage(draw->info->fill_pattern);
        draw->info->fill_pattern = NULL;
    }

    if (!NIL_P(pattern))
    {
        Image *image;

        pattern = rm_cur_image(pattern);
        image = rm_check_destroyed(pattern);
        // Do not trace creation
        draw->info->fill_pattern = rm_clone_image(image);
    }

    return pattern;
}

#fill_rule(rule) ⇒ Object 



392
393
394
395
 
# File 'lib/rmagick_internal.rb', line 392

def fill_rule(rule)
  Kernel.raise ArgumentError, "Unknown fill rule #{rule}" unless %w[evenodd nonzero].include?(rule.downcase)
  primitive "fill-rule #{rule}"
end

#font(name) ⇒ Object

Specify text drawing font



398
399
400
 
# File 'lib/rmagick_internal.rb', line 398

def font(name)
  primitive "font \'#{name}\'"
end

#font=(font) ⇒ String

Set the font name.

Parameters:

  • font (String) —

    the font name

Returns:

  • (String) —

    the given font name



183
184
185
186
187
188
189
190
191
192
193
 
# File 'ext/RMagick/rmdraw.c', line 183

VALUE
Draw_font_eq(VALUE self, VALUE font)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    magick_clone_string(&draw->info->font, StringValueCStr(font));

    return font;
}

#font_family(name) ⇒ Object 



402
403
404
 
# File 'lib/rmagick_internal.rb', line 402

def font_family(name)
  primitive "font-family \'#{name}\'"
end

#font_family=(family) ⇒ String

Set the font family name.

Parameters:

  • family (String) —

    the font family name

Returns:

  • (String) —

    the given family name



202
203
204
205
206
207
208
209
210
211
212
 
# File 'ext/RMagick/rmdraw.c', line 202

VALUE
Draw_font_family_eq(VALUE self, VALUE family)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    magick_clone_string(&draw->info->family, StringValueCStr(family));

    return family;
}

#font_stretch(stretch) ⇒ Object 



406
407
408
409
 
# File 'lib/rmagick_internal.rb', line 406

def font_stretch(stretch)
  Kernel.raise ArgumentError, 'Unknown stretch type' unless STRETCH_TYPE_NAMES.key?(stretch.to_i)
  primitive "font-stretch #{STRETCH_TYPE_NAMES[stretch.to_i]}"
end

#font_stretch=(stretch) ⇒ Magick::StretchType

Set the stretch as spacing between text characters.

Parameters:

  • stretch (Magick::StretchType) —

    the stretch type

Returns:

  • (Magick::StretchType) —

    the given stretch type



221
222
223
224
225
226
227
228
229
230
 
# File 'ext/RMagick/rmdraw.c', line 221

VALUE
Draw_font_stretch_eq(VALUE self, VALUE stretch)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    VALUE_TO_ENUM(stretch, draw->info->stretch, StretchType);
    return stretch;
}

#font_style(style) ⇒ Object 



411
412
413
414
 
# File 'lib/rmagick_internal.rb', line 411

def font_style(style)
  Kernel.raise ArgumentError, 'Unknown style type' unless STYLE_TYPE_NAMES.key?(style.to_i)
  primitive "font-style #{STYLE_TYPE_NAMES[style.to_i]}"
end

#font_style=(style) ⇒ Magick::StyleType

Set font style.

Parameters:

  • style (Magick::StyleType) —

    the font style

Returns:

  • (Magick::StyleType) —

    the given font style



239
240
241
242
243
244
245
246
247
248
 
# File 'ext/RMagick/rmdraw.c', line 239

VALUE
Draw_font_style_eq(VALUE self, VALUE style)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    VALUE_TO_ENUM(style, draw->info->style, StyleType);
    return style;
}

#font_weight(weight) ⇒ Object

The font weight argument can be either a font weight constant or [100,200,…,900]



418
419
420
421
422
423
424
 
# File 'lib/rmagick_internal.rb', line 418

def font_weight(weight)
  if weight.is_a?(WeightType)
    primitive "font-weight #{FONT_WEIGHT_NAMES[weight.to_i]}"
  else
    primitive "font-weight #{Integer(weight)}"
  end
end

#font_weight=(weight) ⇒ Magick::WeightType, Numeric

Note:

The font weight can be one of the font weight constants or a number between 100 and 900

Set font weight.

Parameters:

  • weight (Magick::WeightType, Numeric) —

    the font weight

Returns:

  • (Magick::WeightType, Numeric) —

    the given font weight



258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
 
# File 'ext/RMagick/rmdraw.c', line 258

VALUE
Draw_font_weight_eq(VALUE self, VALUE weight)
{
    Draw *draw;
    size_t w;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);

    if (FIXNUM_P(weight))
    {
        w = FIX2INT(weight);
        if (w < 100 || w > 900)
        {
            rb_raise(rb_eArgError, "invalid font weight (%"RMIuSIZE" given)", w);
        }
        draw->info->weight = w;
    }
    else
    {
        VALUE_TO_ENUM(weight, w, WeightType);
        switch (w)
        {
            case AnyWeight:
                draw->info->weight = 0;
                break;
            case NormalWeight:
                draw->info->weight = 400;
                break;
            case BoldWeight:
                draw->info->weight = 700;
                break;
            case BolderWeight:
                if (draw->info->weight <= 800)
                    draw->info->weight += 100;
                break;
            case LighterWeight:
                if (draw->info->weight >= 100)
                    draw->info->weight -= 100;
                break;
            default:
                rb_raise(rb_eArgError, "unknown font weight");
                break;
        }
    }

    return weight;
}

#get_multiline_type_metrics(text) ⇒ Magick::TypeMetric #Draw ⇒ Magick::TypeMetric

Returns measurements for a given font and text string.

  • If the image argument has been omitted, use a dummy image, but make sure the text has none of the special characters that refer to image attributes.

Overloads:

  • #get_multiline_type_metrics(text) ⇒ Magick::TypeMetric

    Parameters:

    • text (String) —

      The string to be rendered.

  • #Draw ⇒ Magick::TypeMetric

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • text (String) —

      The string to be rendered.

Returns:

  • (Magick::TypeMetric) —

    The information for a specific string if rendered on a image.



1159
1160
1161
1162
1163
1164
1165
1166
 
# File 'ext/RMagick/rmdraw.c', line 1159

VALUE
Draw_get_multiline_type_metrics(
                               int argc,
                               VALUE *argv,
                               VALUE self)
{
    return get_type_metrics(argc, argv, self, GetMultilineTypeMetrics);
}

#get_type_metrics(text) ⇒ Magick::TypeMetric #get_type_metrics(image, text) ⇒ Magick::TypeMetric

Returns measurements for a given font and text string.

  • If the image argument has been omitted, use a dummy image, but make sure the text has none of the special characters that refer to image attributes.

Overloads:

  • #get_type_metrics(text) ⇒ Magick::TypeMetric

    Parameters:

    • text (String) —

      The string to be rendered.

  • #get_type_metrics(image, text) ⇒ Magick::TypeMetric

    Parameters:

    • image (Magick::Image, Magick::ImageList) —

      Either an imagelist or an image. If an imagelist, uses the current image.

    • text (String) —

      The string to be rendered.

Returns:

  • (Magick::TypeMetric) —

    The information for a specific string if rendered on a image.



1132
1133
1134
1135
1136
1137
1138
1139
 
# File 'ext/RMagick/rmdraw.c', line 1132

VALUE
Draw_get_type_metrics(
                     int argc,
                     VALUE *argv,
                     VALUE self)
{
    return get_type_metrics(argc, argv, self, GetTypeMetrics);
}

#gravity(grav) ⇒ Object

Specify the text positioning gravity, one of: NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast



428
429
430
431
 
# File 'lib/rmagick_internal.rb', line 428

def gravity(grav)
  Kernel.raise ArgumentError, 'Unknown text positioning gravity' unless GRAVITY_NAMES.key?(grav.to_i)
  primitive "gravity #{GRAVITY_NAMES[grav.to_i]}"
end

#gravity=(grav) ⇒ Magick::GravityType

Set gravity to draw text. Gravity affects text placement in bounding area according to rules:

  • NorthWestGravity - text bottom-left corner placed at top-left

  • NorthGravity - text bottom-center placed at top-center

  • NorthEastGravity - text bottom-right corner placed at top-right

  • WestGravity - text left-center placed at left-center

  • CenterGravity - text center placed at center

  • EastGravity - text right-center placed at right-center

  • SouthWestGravity - text top-left placed at bottom-left

  • SouthGravity - text top-center placed at bottom-center

  • SouthEastGravity - text top-right placed at bottom-right

Parameters:

  • grav (Magick::GravityType) —

    this gravity type

Returns:

  • (Magick::GravityType) —

    the given gravity type



325
326
327
328
329
330
331
332
333
334
335
 
# File 'ext/RMagick/rmdraw.c', line 325

VALUE
Draw_gravity_eq(VALUE self, VALUE grav)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    VALUE_TO_ENUM(grav, draw->info->gravity, GravityType);

    return grav;
}

#image(composite, x, y, width, height, image_file_path) ⇒ Object 



433
434
435
436
437
 
# File 'lib/rmagick_internal.rb', line 433

def image(composite, x, y, width, height, image_file_path)
  Kernel.raise ArgumentError, 'Unknown composite' unless composite.is_a?(CompositeOperator)
  composite_name = composite.to_s.sub!('CompositeOp', '')
  primitive 'image ' + sprintf('%s %g,%g %g,%g %s', composite_name, x, y, width, height, enquote(image_file_path))
end

#initialize_copy(orig) ⇒ Magick::Draw

Initialize clone, dup methods.

Parameters:

  • orig —

    the original object

Returns:



1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
 
# File 'ext/RMagick/rmdraw.c', line 1175

VALUE Draw_init_copy(VALUE self, VALUE orig)
{
    Draw *copy, *original;

    Data_Get_Struct(orig, Draw, original);
    Data_Get_Struct(self, Draw, copy);

    copy->info = CloneDrawInfo(NULL, original->info);
    if (!copy->info)
    {
        rb_raise(rb_eNoMemError, "not enough memory to continue");
    }

    if (original->primitives)
    {
        copy->primitives = rb_str_dup(original->primitives);
    }

    return self;
}

#inspect ⇒ String

Display the primitives.

Returns:

  • (String) —

    the draw primitives or the Ruby string “(no primitives defined)” if they are not defined



1227
1228
1229
1230
1231
1232
1233
1234
 
# File 'ext/RMagick/rmdraw.c', line 1227

VALUE
Draw_inspect(VALUE self)
{
    Draw *draw;

    Data_Get_Struct(self, Draw, draw);
    return draw->primitives ? draw->primitives : rb_str_new2("(no primitives defined)");
}

#interline_spacing(space) ⇒ Object

IM 6.5.5-8 and later



440
441
442
443
444
445
446
447
448
449
 
# File 'lib/rmagick_internal.rb', line 440

def interline_spacing(space)
  begin
    Float(space)
  rescue ArgumentError
    Kernel.raise ArgumentError, 'invalid value for interline_spacing'
  rescue TypeError
    Kernel.raise TypeError, "can't convert #{space.class} into Float"
  end
  primitive "interline-spacing #{space}"
end

#interline_spacing=(spacing) ⇒ Float

Set spacing between two lines.

Parameters:

  • spacing (Float) —

    the spacing

Returns:

  • (Float) —

    the given spacing



362
363
364
365
366
367
368
369
370
371
 
# File 'ext/RMagick/rmdraw.c', line 362

VALUE
Draw_interline_spacing_eq(VALUE self, VALUE spacing)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->interline_spacing = NUM2DBL(spacing);
    return spacing;
}

#interword_spacing(space) ⇒ Object

IM 6.4.8-3 and later



452
453
454
455
456
457
458
459
460
461
 
# File 'lib/rmagick_internal.rb', line 452

def interword_spacing(space)
  begin
    Float(space)
  rescue ArgumentError
    Kernel.raise ArgumentError, 'invalid value for interword_spacing'
  rescue TypeError
    Kernel.raise TypeError, "can't convert #{space.class} into Float"
  end
  primitive "interword-spacing #{space}"
end

#interword_spacing=(spacing) ⇒ Float

Set spacing between two words.

Parameters:

  • spacing (Float) —

    the spacing

Returns:

  • (Float) —

    the given spacing



380
381
382
383
384
385
386
387
388
389
 
# File 'ext/RMagick/rmdraw.c', line 380

VALUE
Draw_interword_spacing_eq(VALUE self, VALUE spacing)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->interword_spacing = NUM2DBL(spacing);
    return spacing;
}

#kerning(space) ⇒ Object

IM 6.4.8-3 and later



464
465
466
467
468
469
470
471
472
473
 
# File 'lib/rmagick_internal.rb', line 464

def kerning(space)
  begin
    Float(space)
  rescue ArgumentError
    Kernel.raise ArgumentError, 'invalid value for kerning'
  rescue TypeError
    Kernel.raise TypeError, "can't convert #{space.class} into Float"
  end
  primitive "kerning #{space}"
end

#kerning=(kerning) ⇒ Float

Set kerning as spacing between two letters.

Parameters:

  • kerning (Float) —

    the kerning

Returns:

  • (Float) —

    the given kerning



344
345
346
347
348
349
350
351
352
353
 
# File 'ext/RMagick/rmdraw.c', line 344

VALUE
Draw_kerning_eq(VALUE self, VALUE kerning)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->kerning = NUM2DBL(kerning);
    return kerning;
}

#line(start_x, start_y, end_x, end_y) ⇒ Object

Draw a line



476
477
478
 
# File 'lib/rmagick_internal.rb', line 476

def line(start_x, start_y, end_x, end_y)
  primitive 'line ' + sprintf('%g,%g %g,%g', start_x, start_y, end_x, end_y)
end

#marshal_dump ⇒ Hash

TODO:

Handle gradients when christy gets the new gradient support added (23Dec08)

Dump custom marshal for Draw objects.

  • Instead of trying to replicate Ruby’s support for cross-system marshalling, exploit it. Convert the Draw fields to Ruby objects and store them in a hash. Let Ruby marshal the hash.

  • Commented out code that dumps/loads fields that are used internally by ImageMagick and shouldn’t be marshaled. I left the code as placeholders so I’ll know which fields have been deliberately omitted.

Returns:

  • (Hash) —

    the marshalled object



479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
 
# File 'ext/RMagick/rmdraw.c', line 479

VALUE
Draw_marshal_dump(VALUE self)
{
    Draw *draw;
    VALUE ddraw;

    Data_Get_Struct(self, Draw, draw);

    // Raise an exception if the Draw has a non-NULL gradient or element_reference field
    if (draw->info->element_reference.type != UndefinedReference
        || draw->info->gradient.type != UndefinedGradient)
    {
        rb_raise(rb_eTypeError, "can't dump gradient definition");
    }

    ddraw = rb_hash_new();

    // rb_hash_aset(ddraw, CSTR2SYM("primitive"), MAGICK_STRING_TO_OBJ(draw->info->primitive)); internal
    // rb_hash_aset(ddraw, CSTR2SYM("geometry"), MAGICK_STRING_TO_OBJ(draw->info->geometry)); set by "text" primitive
    // rb_hash_aset(ddraw, CSTR2SYM("viewbox"), Import_RectangleInfo(&draw->info->viewbox)); internal
    rb_hash_aset(ddraw, CSTR2SYM("affine"), Import_AffineMatrix(&draw->info->affine));
    rb_hash_aset(ddraw, CSTR2SYM("gravity"), INT2FIX(draw->info->gravity));
    rb_hash_aset(ddraw, CSTR2SYM("fill"), Pixel_from_PixelColor(&draw->info->fill));
    rb_hash_aset(ddraw, CSTR2SYM("stroke"), Pixel_from_PixelColor(&draw->info->stroke));
    rb_hash_aset(ddraw, CSTR2SYM("stroke_width"), rb_float_new(draw->info->stroke_width));
    // rb_hash_aset(ddraw, CSTR2SYM("gradient"), Qnil);  // not used yet
    rb_hash_aset(ddraw, CSTR2SYM("fill_pattern"), image_to_str(draw->info->fill_pattern));
    rb_hash_aset(ddraw, CSTR2SYM("tile"), Qnil); // deprecated
    rb_hash_aset(ddraw, CSTR2SYM("stroke_pattern"), image_to_str(draw->info->stroke_pattern));
    rb_hash_aset(ddraw, CSTR2SYM("stroke_antialias"), draw->info->stroke_antialias ? Qtrue : Qfalse);
    rb_hash_aset(ddraw, CSTR2SYM("text_antialias"), draw->info->text_antialias ? Qtrue : Qfalse);
    // rb_hash_aset(ddraw, CSTR2SYM("fill_rule"), INT2FIX(draw->info->fill_rule)); internal
    // rb_hash_aset(ddraw, CSTR2SYM("linecap"), INT2FIX(draw->info->linecap));
    // rb_hash_aset(ddraw, CSTR2SYM("linejoin"), INT2FIX(draw->info->linejoin));
    // rb_hash_aset(ddraw, CSTR2SYM("miterlimit"), ULONG2NUM(draw->info->miterlimit));
    // rb_hash_aset(ddraw, CSTR2SYM("dash_offset"), rb_float_new(draw->info->dash_offset));
    rb_hash_aset(ddraw, CSTR2SYM("decorate"), INT2FIX(draw->info->decorate));
    // rb_hash_aset(ddraw, CSTR2SYM("compose"), INT2FIX(draw->info->compose)); set via "image" primitive
    // rb_hash_aset(ddraw, CSTR2SYM("text"), MAGICK_STRING_TO_OBJ(draw->info->text)); set via "text" primitive
    // rb_hash_aset(ddraw, CSTR2SYM("face"), Qnil);  internal
    rb_hash_aset(ddraw, CSTR2SYM("font"), MAGICK_STRING_TO_OBJ(draw->info->font));
    // rb_hash_aset(ddraw, CSTR2SYM("metrics"), Qnil);   internal
    rb_hash_aset(ddraw, CSTR2SYM("family"), MAGICK_STRING_TO_OBJ(draw->info->family));
    rb_hash_aset(ddraw, CSTR2SYM("style"), INT2FIX(draw->info->style));
    rb_hash_aset(ddraw, CSTR2SYM("stretch"), INT2FIX(draw->info->stretch));
    rb_hash_aset(ddraw, CSTR2SYM("weight"), ULONG2NUM(draw->info->weight));
    rb_hash_aset(ddraw, CSTR2SYM("encoding"), MAGICK_STRING_TO_OBJ(draw->info->encoding));
    rb_hash_aset(ddraw, CSTR2SYM("pointsize"), rb_float_new(draw->info->pointsize));
    rb_hash_aset(ddraw, CSTR2SYM("density"), MAGICK_STRING_TO_OBJ(draw->info->density));
    rb_hash_aset(ddraw, CSTR2SYM("align"), INT2FIX(draw->info->align));
    rb_hash_aset(ddraw, CSTR2SYM("undercolor"), Pixel_from_PixelColor(&draw->info->undercolor));
    // rb_hash_aset(ddraw, CSTR2SYM("border_color"), Pixel_from_PixelColor(&draw->info->border_color)); Montage and Polaroid
    // rb_hash_aset(ddraw, CSTR2SYM("server_name"), MAGICK_STRING_TO_OBJ(draw->info->server_name));
    // rb_hash_aset(ddraw, CSTR2SYM("dash_pattern"), dash_pattern_to_array(draw->info->dash_pattern)); internal
    // rb_hash_aset(ddraw, CSTR2SYM("clip_mask"), MAGICK_STRING_TO_OBJ(draw->info->clip_mask)); internal
    // rb_hash_aset(ddraw, CSTR2SYM("bounds"), Import_SegmentInfo(&draw->info->bounds)); internal
    rb_hash_aset(ddraw, CSTR2SYM("clip_units"), INT2FIX(draw->info->clip_units));
#if defined(IMAGEMAGICK_7)
    rb_hash_aset(ddraw, CSTR2SYM("alpha"), QUANTUM2NUM(draw->info->alpha));
#else
    rb_hash_aset(ddraw, CSTR2SYM("opacity"), QUANTUM2NUM(draw->info->opacity));
#endif
    // rb_hash_aset(ddraw, CSTR2SYM("render"), draw->info->render ? Qtrue : Qfalse); internal
    // rb_hash_aset(ddraw, CSTR2SYM("element_reference"), Qnil);     // not used yet
    // rb_hash_aset(ddraw, CSTR2SYM("debug"), draw->info->debug ? Qtrue : Qfalse);
    rb_hash_aset(ddraw, CSTR2SYM("kerning"), rb_float_new(draw->info->kerning));
    rb_hash_aset(ddraw, CSTR2SYM("interword_spacing"), rb_float_new(draw->info->interword_spacing));

    // Non-DrawInfo fields
    rb_hash_aset(ddraw, CSTR2SYM("primitives"), draw->primitives);
    // rb_hash_aset(ddraw, CSTR2SYM("shadow_color"), Pixel_from_PixelColor(&draw->shadow_color)); Polaroid-only

    return ddraw;
}

#marshal_load(ddraw) ⇒ Magick::Draw

Load the marshalled object

Parameters:

  • ddraw (Hash) —

    the marshalled object

Returns:



561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
 
# File 'ext/RMagick/rmdraw.c', line 561

VALUE
Draw_marshal_load(VALUE self, VALUE ddraw)
{
    Draw *draw;
    VALUE val;

    Data_Get_Struct(self, Draw, draw);
    
    if (draw->info == NULL)
    {
        ImageInfo *image_info;

        image_info = CloneImageInfo(NULL);
        draw->info = CloneDrawInfo(image_info, (DrawInfo *) NULL);
        DestroyImageInfo(image_info);        
    }
    OBJ_TO_MAGICK_STRING(draw->info->geometry, rb_hash_aref(ddraw, CSTR2SYM("geometry")));

    //val = rb_hash_aref(ddraw, CSTR2SYM("viewbox"));
    //Export_RectangleInfo(&draw->info->viewbox, val);

    val = rb_hash_aref(ddraw, CSTR2SYM("affine"));
    Export_AffineMatrix(&draw->info->affine, val);

    draw->info->gravity = (GravityType) FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("gravity")));

    val = rb_hash_aref(ddraw, CSTR2SYM("fill"));
    Color_to_PixelColor(&draw->info->fill, val);

    val = rb_hash_aref(ddraw, CSTR2SYM("stroke"));
    Color_to_PixelColor(&draw->info->stroke, val);

    draw->info->stroke_width = NUM2DBL(rb_hash_aref(ddraw, CSTR2SYM("stroke_width")));
    draw->info->fill_pattern = str_to_image(rb_hash_aref(ddraw, CSTR2SYM("fill_pattern")));
    draw->info->stroke_pattern = str_to_image(rb_hash_aref(ddraw, CSTR2SYM("stroke_pattern")));
    draw->info->stroke_antialias = RTEST(rb_hash_aref(ddraw, CSTR2SYM("stroke_antialias")));
    draw->info->text_antialias = RTEST(rb_hash_aref(ddraw, CSTR2SYM("text_antialias")));
    draw->info->decorate = (DecorationType) FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("decorate")));
    OBJ_TO_MAGICK_STRING(draw->info->font, rb_hash_aref(ddraw, CSTR2SYM("font")));
    OBJ_TO_MAGICK_STRING(draw->info->family, rb_hash_aref(ddraw, CSTR2SYM("family")));

    draw->info->style = (StyleType) FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("style")));
    draw->info->stretch = (StretchType) FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("stretch")));
    draw->info->weight = NUM2ULONG(rb_hash_aref(ddraw, CSTR2SYM("weight")));
    OBJ_TO_MAGICK_STRING(draw->info->encoding, rb_hash_aref(ddraw, CSTR2SYM("encoding")));
    draw->info->pointsize = NUM2DBL(rb_hash_aref(ddraw, CSTR2SYM("pointsize")));
    OBJ_TO_MAGICK_STRING(draw->info->density, rb_hash_aref(ddraw, CSTR2SYM("density")));
    draw->info->align = (AlignType) FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("align")));

    val = rb_hash_aref(ddraw, CSTR2SYM("undercolor"));
    Color_to_PixelColor(&draw->info->undercolor, val);

    draw->info->clip_units = FIX2INT(rb_hash_aref(ddraw, CSTR2SYM("clip_units")));
#if defined(IMAGEMAGICK_7)
    draw->info->alpha = NUM2QUANTUM(rb_hash_aref(ddraw, CSTR2SYM("alpha")));
#else
    draw->info->opacity = NUM2QUANTUM(rb_hash_aref(ddraw, CSTR2SYM("opacity")));
#endif
    draw->info->kerning = NUM2DBL(rb_hash_aref(ddraw, CSTR2SYM("kerning")));
    draw->info->interword_spacing = NUM2DBL(rb_hash_aref(ddraw, CSTR2SYM("interword_spacing")));

    draw->primitives = rb_hash_aref(ddraw, CSTR2SYM("primitives"));

    RB_GC_GUARD(val);

    return self;
}

#opacity(opacity) ⇒ Object

Specify drawing fill and stroke opacities. If the value is a string ending with a %, the number will be multiplied by 0.01.



482
483
484
485
 
# File 'lib/rmagick_internal.rb', line 482

def opacity(opacity)
  check_opacity(opacity)
  primitive "opacity #{opacity}"
end

#path(cmds) ⇒ Object

Draw using SVG-compatible path drawing commands. Note that the primitive requires that the commands be surrounded by quotes or apostrophes. Here we simply use apostrophes.



490
491
492
 
# File 'lib/rmagick_internal.rb', line 490

def path(cmds)
  primitive "path '" + cmds + "'"
end

#pattern(name, x, y, width, height) ⇒ Object

Define a pattern. In the block, call primitive methods to draw the pattern. Reference the pattern by using its name as the argument to the ‘fill’ or ‘stroke’ methods



497
498
499
500
501
502
503
504
505
506
 
# File 'lib/rmagick_internal.rb', line 497

def pattern(name, x, y, width, height)
  push('defs')
  push("pattern #{name} " + sprintf('%g %g %g %g', x, y, width, height))
  push('graphic-context')
  yield
ensure
  pop('graphic-context')
  pop('pattern')
  pop('defs')
end

#point(x, y) ⇒ Object

Set point to fill color.



509
510
511
 
# File 'lib/rmagick_internal.rb', line 509

def point(x, y)
  primitive 'point ' + sprintf('%g,%g', x, y)
end

#pointsize(points) ⇒ Object Also known as: font_size

Specify the font size in points. Yes, the primitive is “font-size” but in other places this value is called the “pointsize”. Give it both names.



515
516
517
 
# File 'lib/rmagick_internal.rb', line 515

def pointsize(points)
  primitive 'font-size ' + sprintf('%g', points)
end

#pointsize=(pointsize) ⇒ Float

Set point size to draw text.

Parameters:

  • pointsize (Float) —

    the pointsize

Returns:

  • (Float) —

    the given pointsize



636
637
638
639
640
641
642
643
644
645
 
# File 'ext/RMagick/rmdraw.c', line 636

VALUE
Draw_pointsize_eq(VALUE self, VALUE pointsize)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->pointsize = NUM2DBL(pointsize);
    return pointsize;
}

#polygon(*points) ⇒ Object

Draw a polygon



521
522
523
524
525
526
527
528
 
# File 'lib/rmagick_internal.rb', line 521

def polygon(*points)
  if points.length.zero?
    Kernel.raise ArgumentError, 'no points specified'
  elsif points.length.odd?
    Kernel.raise ArgumentError, 'odd number of points specified'
  end
  primitive 'polygon ' + points.map! { |x| sprintf('%g', x) }.join(',')
end

#polyline(*points) ⇒ Object

Draw a polyline



531
532
533
534
535
536
537
538
 
# File 'lib/rmagick_internal.rb', line 531

def polyline(*points)
  if points.length.zero?
    Kernel.raise ArgumentError, 'no points specified'
  elsif points.length.odd?
    Kernel.raise ArgumentError, 'odd number of points specified'
  end
  primitive 'polyline ' + points.map! { |x| sprintf('%g', x) }.join(',')
end

#pop(*what) ⇒ Object

Return to the previously-saved set of whatever pop(‘graphic-context’) (the default if no arguments) pop(‘defs’) pop(‘gradient’) pop(‘pattern’)



546
547
548
549
550
551
552
553
 
# File 'lib/rmagick_internal.rb', line 546

def pop(*what)
  if what.length.zero?
    primitive 'pop graphic-context'
  else
    # to_s allows a Symbol to be used instead of a String
    primitive 'pop ' + what.map(&:to_s).join(' ')
  end
end

#primitive(primitive) ⇒ Magick::Draw

Add a drawing primitive to the list of primitives in the Draw object.

Parameters:

  • primitive (String) —

    the primitive to add

Returns:



1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
 
# File 'ext/RMagick/rmdraw.c', line 1263

VALUE
Draw_primitive(VALUE self, VALUE primitive)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);

    if (draw->primitives == (VALUE)0)
    {
        draw->primitives = primitive;
    }
    else
    {
        draw->primitives = rb_str_concat(draw->primitives, rb_str_new2("\n"));
        draw->primitives = rb_str_concat(draw->primitives, primitive);
    }

    return self;
}

#push(*what) ⇒ Object

Push the current set of drawing options. Also you can use push(‘graphic-context’) (the default if no arguments) push(‘defs’) push(‘gradient’) push(‘pattern’)



560
561
562
563
564
565
566
567
 
# File 'lib/rmagick_internal.rb', line 560

def push(*what)
  if what.length.zero?
    primitive 'push graphic-context'
  else
    # to_s allows a Symbol to be used instead of a String
    primitive 'push ' + what.map(&:to_s).join(' ')
  end
end

#rectangle(upper_left_x, upper_left_y, lower_right_x, lower_right_y) ⇒ Object

Draw a rectangle



570
571
572
573
574
575
 
# File 'lib/rmagick_internal.rb', line 570

def rectangle(upper_left_x, upper_left_y, lower_right_x, lower_right_y)
  primitive 'rectangle ' + sprintf(
    '%g,%g %g,%g',
    upper_left_x, upper_left_y, lower_right_x, lower_right_y
  )
end

#rotate(angle) ⇒ Object

Specify coordinate space rotation. “angle” is measured in degrees



578
579
580
 
# File 'lib/rmagick_internal.rb', line 578

def rotate(angle)
  primitive 'rotate ' + sprintf('%g', angle)
end

#rotation=(deg) ⇒ Float

Set rotation. The argument should be in degrees.

Parameters:

  • deg (Float) —

    the number of degrees

Returns:

  • (Float) —

    the given degrees



654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
 
# File 'ext/RMagick/rmdraw.c', line 654

VALUE
Draw_rotation_eq(VALUE self, VALUE deg)
{
    Draw *draw;
    double degrees;
    AffineMatrix affine, current;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);

    degrees = NUM2DBL(deg);
    if (fabs(degrees) > DBL_EPSILON)
    {
        current   = draw->info->affine;
        affine.sx = cos(DegreesToRadians(fmod(degrees, 360.0)));
        affine.rx = sin(DegreesToRadians(fmod(degrees, 360.0)));
        affine.tx = 0.0;
        affine.ry = (-sin(DegreesToRadians(fmod(degrees, 360.0))));
        affine.sy = cos(DegreesToRadians(fmod(degrees, 360.0)));
        affine.ty = 0.0;

        draw->info->affine.sx = current.sx*affine.sx+current.ry*affine.rx;
        draw->info->affine.rx = current.rx*affine.sx+current.sy*affine.rx;
        draw->info->affine.ry = current.sx*affine.ry+current.ry*affine.sy;
        draw->info->affine.sy = current.rx*affine.ry+current.sy*affine.sy;
        draw->info->affine.tx = current.sx*affine.tx+current.ry*affine.ty+current.tx;
    }

    return deg;
}

#roundrectangle(center_x, center_y, width, height, corner_width, corner_height) ⇒ Object

Draw a rectangle with rounded corners



583
584
585
586
587
588
 
# File 'lib/rmagick_internal.rb', line 583

def roundrectangle(center_x, center_y, width, height, corner_width, corner_height)
  primitive 'roundrectangle ' + sprintf(
    '%g,%g,%g,%g,%g,%g',
    center_x, center_y, width, height, corner_width, corner_height
  )
end

#scale(x, y) ⇒ Object

Specify scaling to be applied to coordinate space on subsequent drawing commands.



591
592
593
 
# File 'lib/rmagick_internal.rb', line 591

def scale(x, y)
  primitive 'scale ' + sprintf('%g,%g', x, y)
end

#skewx(angle) ⇒ Object 



595
596
597
 
# File 'lib/rmagick_internal.rb', line 595

def skewx(angle)
  primitive 'skewX ' + sprintf('%g', angle)
end

#skewy(angle) ⇒ Object 



599
600
601
 
# File 'lib/rmagick_internal.rb', line 599

def skewy(angle)
  primitive 'skewY ' + sprintf('%g', angle)
end

#stroke(colorspec) ⇒ Object Also known as: stroke_color, stroke_pattern

Specify the object stroke, a color name or pattern name.



604
605
606
 
# File 'lib/rmagick_internal.rb', line 604

def stroke(colorspec)
  primitive "stroke #{enquote(colorspec)}"
end

#stroke=(stroke) ⇒ Magick::Pixel, String

Set stroke.

Parameters:

Returns:



692
693
694
695
696
697
698
699
700
701
 
# File 'ext/RMagick/rmdraw.c', line 692

VALUE
Draw_stroke_eq(VALUE self, VALUE stroke)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    Color_to_PixelColor(&draw->info->stroke, stroke);
    return stroke;
}

#stroke_antialias(bool) ⇒ Object

Specify if stroke should be antialiased or not



611
612
613
614
 
# File 'lib/rmagick_internal.rb', line 611

def stroke_antialias(bool)
  bool = bool ? '1' : '0'
  primitive "stroke-antialias #{bool}"
end

#stroke_dasharray(*list) ⇒ Object

Specify a stroke dash pattern



617
618
619
620
621
622
623
624
625
626
 
# File 'lib/rmagick_internal.rb', line 617

def stroke_dasharray(*list)
  if list.length.zero?
    primitive 'stroke-dasharray none'
  else
    list.each do |x|
      Kernel.raise ArgumentError, "dash array elements must be > 0 (#{x} given)" if x <= 0
    end
    primitive "stroke-dasharray #{list.join(',')}"
  end
end

#stroke_dashoffset(value = 0) ⇒ Object

Specify the initial offset in the dash pattern



629
630
631
 
# File 'lib/rmagick_internal.rb', line 629

def stroke_dashoffset(value = 0)
  primitive 'stroke-dashoffset ' + sprintf('%g', value)
end

#stroke_linecap(value) ⇒ Object 



633
634
635
636
 
# File 'lib/rmagick_internal.rb', line 633

def stroke_linecap(value)
  Kernel.raise ArgumentError, "Unknown linecap type: #{value}" unless %w[butt round square].include?(value.downcase)
  primitive "stroke-linecap #{value}"
end

#stroke_linejoin(value) ⇒ Object 



638
639
640
641
 
# File 'lib/rmagick_internal.rb', line 638

def stroke_linejoin(value)
  Kernel.raise ArgumentError, "Unknown linejoin type: #{value}" unless %w[round miter bevel].include?(value.downcase)
  primitive "stroke-linejoin #{value}"
end

#stroke_miterlimit(value) ⇒ Object 



643
644
645
646
 
# File 'lib/rmagick_internal.rb', line 643

def stroke_miterlimit(value)
  Kernel.raise ArgumentError, 'miterlimit must be >= 1' if value < 1
  primitive "stroke-miterlimit #{value}"
end

#stroke_opacity(opacity) ⇒ Object

Specify opacity of stroke drawing color

(use "xx%" to indicate percentage)



650
651
652
653
 
# File 'lib/rmagick_internal.rb', line 650

def stroke_opacity(opacity)
  check_opacity(opacity)
  primitive "stroke-opacity #{opacity}"
end

#stroke_pattern=(pattern) ⇒ Magick::Image

Accept an image as a stroke pattern.

Parameters:

Returns:

See Also:



712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
 
# File 'ext/RMagick/rmdraw.c', line 712

VALUE
Draw_stroke_pattern_eq(VALUE self, VALUE pattern)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);

    if (draw->info->stroke_pattern != NULL)
    {
        // Do not trace destruction
        DestroyImage(draw->info->stroke_pattern);
        draw->info->stroke_pattern = NULL;
    }

    if (!NIL_P(pattern))
    {
        Image *image;

        // DestroyDrawInfo destroys the clone
        pattern = rm_cur_image(pattern);
        image = rm_check_destroyed(pattern);
        // Do not trace creation
        draw->info->stroke_pattern = rm_clone_image(image);
    }

    return pattern;
}

#stroke_width(pixels) ⇒ Object

Specify stroke (outline) width in pixels.



656
657
658
 
# File 'lib/rmagick_internal.rb', line 656

def stroke_width(pixels)
  primitive 'stroke-width ' + sprintf('%g', pixels)
end

#stroke_width=(stroke_width) ⇒ Float

Set stroke width.

Parameters:

  • stroke_width (Float) —

    the stroke width

Returns:

  • (Float) —

    the given stroke width



748
749
750
751
752
753
754
755
756
757
 
# File 'ext/RMagick/rmdraw.c', line 748

VALUE
Draw_stroke_width_eq(VALUE self, VALUE stroke_width)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->stroke_width = NUM2DBL(stroke_width);
    return stroke_width;
}

#text(x, y, text) ⇒ Object

Draw text at position x,y. Add quotes to text that is not already quoted.



661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
 
# File 'lib/rmagick_internal.rb', line 661

def text(x, y, text)
  Kernel.raise ArgumentError, 'missing text argument' if text.to_s.empty?
  if text.length > 2 && /\A(?:\"[^\"]+\"|\'[^\']+\'|\{[^\}]+\})\z/.match(text)
  # text already quoted
  elsif !text['\'']
    text = '\'' + text + '\''
  elsif !text['"']
    text = '"' + text + '"'
  elsif !(text['{'] || text['}'])
    text = '{' + text + '}'
  else
    # escape existing braces, surround with braces
    text = '{' + text.gsub(/[}]/) { |b| '\\' + b } + '}'
  end
  primitive 'text ' + sprintf('%g,%g %s', x, y, text)
end

#text_align(alignment) ⇒ Object

Specify text alignment relative to a given point



679
680
681
682
 
# File 'lib/rmagick_internal.rb', line 679

def text_align(alignment)
  Kernel.raise ArgumentError, "Unknown alignment constant: #{alignment}" unless ALIGN_TYPE_NAMES.key?(alignment.to_i)
  primitive "text-align #{ALIGN_TYPE_NAMES[alignment.to_i]}"
end

#text_anchor(anchor) ⇒ Object

SVG-compatible version of text_align



685
686
687
688
 
# File 'lib/rmagick_internal.rb', line 685

def text_anchor(anchor)
  Kernel.raise ArgumentError, "Unknown anchor constant: #{anchor}" unless ANCHOR_TYPE_NAMES.key?(anchor.to_i)
  primitive "text-anchor #{ANCHOR_TYPE_NAMES[anchor.to_i]}"
end

#text_antialias(boolean) ⇒ Object

Specify if rendered text is to be antialiased.



691
692
693
694
 
# File 'lib/rmagick_internal.rb', line 691

def text_antialias(boolean)
  boolean = boolean ? '1' : '0'
  primitive "text-antialias #{boolean}"
end

#text_antialias=(text_antialias) ⇒ Boolean

Set whether to enable text antialias.

Parameters:

  • text_antialias (Boolean) —

    true if enable text antialias

Returns:

  • (Boolean) —

    the given value



766
767
768
769
770
771
772
773
774
775
 
# File 'ext/RMagick/rmdraw.c', line 766

VALUE
Draw_text_antialias_eq(VALUE self, VALUE text_antialias)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    draw->info->text_antialias = (MagickBooleanType) RTEST(text_antialias);
    return text_antialias;
}

#text_undercolor(color) ⇒ Object

Specify color underneath text



697
698
699
 
# File 'lib/rmagick_internal.rb', line 697

def text_undercolor(color)
  primitive "text-undercolor #{enquote(color)}"
end

#tile=(image) ⇒ Magick::Image

Accept an image as a fill pattern. This is alias of #fill_pattern=.

Parameters:

Returns:



784
785
786
787
788
 
# File 'ext/RMagick/rmdraw.c', line 784

VALUE
Draw_tile_eq(VALUE self, VALUE image)
{
    return Draw_fill_pattern_eq(self, image);
}

#translate(x, y) ⇒ Object

Specify center of coordinate space to use for subsequent drawing commands.



703
704
705
 
# File 'lib/rmagick_internal.rb', line 703

def translate(x, y)
  primitive 'translate ' + sprintf('%g,%g', x, y)
end

#undercolor=(undercolor) ⇒ Magick::Pixel, String

Set undercolor.

Parameters:

Returns:



797
798
799
800
801
802
803
804
805
806
 
# File 'ext/RMagick/rmdraw.c', line 797

VALUE
Draw_undercolor_eq(VALUE self, VALUE undercolor)
{
    Draw *draw;

    rb_check_frozen(self);
    Data_Get_Struct(self, Draw, draw);
    Color_to_PixelColor(&draw->info->undercolor, undercolor);
    return undercolor;
}