Class: Magick::Draw
- Inherits:
-
Object
- Object
- Magick::Draw
- Includes:
- DrawAttribute
- Defined in:
- lib/rmagick_internal.rb,
ext/RMagick/rmmain.cpp
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
-
#affine(sx, rx, ry, sy, tx, ty) ⇒ Object
Apply coordinate transformations to support scaling (s), rotation ®, and translation (t).
-
#alpha(x, y, method) ⇒ Object
Set alpha (make transparent) in image according to the specified colorization rule.
-
#annotate(image_arg, width_arg, height_arg, x_arg, y_arg, text) ⇒ Magick::Draw
Annotates an image with text.
-
#arc(start_x, start_y, end_x, end_y, start_degrees, end_degrees) ⇒ Object
Draw an arc.
-
#bezier(*points) ⇒ Object
Draw a bezier curve.
-
#circle(origin_x, origin_y, perim_x, perim_y) ⇒ Object
Draw a circle.
-
#clip_path(name) ⇒ Object
Invoke a clip-path defined by def_clip_path.
-
#clip_rule(rule) ⇒ Object
Define the clipping rule.
-
#clip_units(unit) ⇒ Object
Define the clip units.
-
#clone ⇒ Magick::Draw
Clones this object.
-
#color(x, y, method) ⇒ Object
Set color in image according to specified colorization rule.
-
#composite(*args) ⇒ Magick::Draw
Draw the image.
-
#decorate(decoration) ⇒ Object
Specify EITHER the text decoration (none, underline, overline, line-through) OR the text solid background color (any color name or spec).
-
#define_clip_path(name) ⇒ Object
Define a clip-path.
-
#draw(image_arg) ⇒ Magick::Draw
Execute the stored drawing primitives on the current image.
-
#dup ⇒ Magick::Draw
Duplicate a Draw object.
-
#ellipse(origin_x, origin_y, width, height, arc_start, arc_end) ⇒ Object
Draw an ellipse.
-
#encoding(encoding) ⇒ Object
Let anything through, but the only defined argument is “UTF-8”.
-
#fill(colorspec) ⇒ Object
(also: #fill_color, #fill_pattern)
Specify object fill, a color name or pattern name.
-
#fill_opacity(opacity) ⇒ Object
Specify fill opacity (use “xx%” to indicate percentage).
- #fill_rule(rule) ⇒ Object
-
#font(name) ⇒ Object
Specify text drawing font.
- #font_family(name) ⇒ Object
- #font_stretch(stretch) ⇒ Object
- #font_style(style) ⇒ Object
-
#font_weight(weight) ⇒ Object
The font weight argument can be either a font weight constant or [100,200,…,900].
-
#get_multiline_type_metrics(*args) ⇒ Magick::TypeMetric
Returns measurements for a given font and text string.
-
#get_type_metrics(*args) ⇒ Magick::TypeMetric
Returns measurements for a given font and text string.
-
#gravity(grav) ⇒ Object
Specify the text positioning gravity, one of: NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast.
- #image(composite, x, y, width, height, image_file_path) ⇒ Object
-
#initialize ⇒ Magick::Draw
constructor
Initialize Draw object.
-
#initialize_copy(orig) ⇒ Magick::Draw
Initialize clone, dup methods.
-
#inspect ⇒ String
Display the primitives.
-
#interline_spacing(space) ⇒ Object
IM 6.5.5-8 and later.
-
#interword_spacing(space) ⇒ Object
IM 6.4.8-3 and later.
-
#kerning(space) ⇒ Object
IM 6.4.8-3 and later.
-
#line(start_x, start_y, end_x, end_y) ⇒ Object
Draw a line.
-
#marshal_dump ⇒ Hash
Dump custom marshal for Draw objects.
-
#marshal_load(ddraw) ⇒ Magick::Draw
Load the marshalled object.
-
#opacity(opacity) ⇒ Object
Specify drawing fill and stroke opacities.
-
#path(cmds) ⇒ Object
Draw using SVG-compatible path drawing commands.
-
#pattern(name, x, y, width, height) ⇒ Object
Define a pattern.
-
#point(x, y) ⇒ Object
Set point to fill color.
-
#pointsize(points) ⇒ Object
(also: #font_size)
Specify the font size in points.
-
#polygon(*points) ⇒ Object
Draw a polygon.
-
#polyline(*points) ⇒ Object
Draw a polyline.
-
#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’).
-
#primitive(primitive) ⇒ Magick::Draw
Add a drawing primitive to the list of primitives in the Draw object.
-
#push(*what) ⇒ Object
Push the current set of drawing options.
-
#rectangle(upper_left_x, upper_left_y, lower_right_x, lower_right_y) ⇒ Object
Draw a rectangle.
-
#rotate(angle) ⇒ Object
Specify coordinate space rotation.
-
#roundrectangle(center_x, center_y, width, height, corner_width, corner_height) ⇒ Object
Draw a rectangle with rounded corners.
-
#scale(x, y) ⇒ Object
Specify scaling to be applied to coordinate space on subsequent drawing commands.
- #skewx(angle) ⇒ Object
- #skewy(angle) ⇒ Object
-
#stroke(colorspec) ⇒ Object
(also: #stroke_color, #stroke_pattern)
Specify the object stroke, a color name or pattern name.
-
#stroke_antialias(bool) ⇒ Object
Specify if stroke should be antialiased or not.
-
#stroke_dasharray(*list) ⇒ Object
Specify a stroke dash pattern.
-
#stroke_dashoffset(value = 0) ⇒ Object
Specify the initial offset in the dash pattern.
- #stroke_linecap(value) ⇒ Object
- #stroke_linejoin(value) ⇒ Object
- #stroke_miterlimit(value) ⇒ Object
-
#stroke_opacity(opacity) ⇒ Object
Specify opacity of stroke drawing color (use “xx%” to indicate percentage).
-
#stroke_width(pixels) ⇒ Object
Specify stroke (outline) width in pixels.
-
#text(x, y, text) ⇒ Object
Draw text at position x,y.
-
#text_align(alignment) ⇒ Object
Specify text alignment relative to a given point.
-
#text_anchor(anchor) ⇒ Object
SVG-compatible version of text_align.
-
#text_antialias(boolean) ⇒ Object
Specify if rendered text is to be antialiased.
-
#text_undercolor(color) ⇒ Object
Specify color underneath text.
-
#translate(x, y) ⇒ Object
Specify center of coordinate space to use for subsequent drawing commands.
Methods included from DrawAttribute
#affine=, #align=, #decorate=, #density=, #encoding=, #fill=, #fill_pattern=, #font=, #font_family=, #font_stretch=, #font_style=, #font_weight=, #gravity=, #interline_spacing=, #interword_spacing=, #kerning=, #pointsize=, #rotation=, #stroke=, #stroke_pattern=, #stroke_width=, #text_antialias=, #tile=, #undercolor=
Constructor Details
#initialize ⇒ Magick::Draw
Initialize Draw object.
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# File 'ext/RMagick/rmdraw.cpp', line 1198
VALUE
Draw_initialize(VALUE self)
{
Draw *draw, *draw_options;
VALUE options;
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, draw);
options = new_DrawOptions();
TypedData_Get_Struct(options, Draw, &rm_draw_data_type, 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.
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# File 'lib/rmagick_internal.rb', line 258 def affine(sx, rx, ry, sy, tx, ty) primitive 'affine ' + sprintf('%g,%g,%g,%g,%g,%g', sx, rx, ry, sy, tx, ty) end |
#alpha(x, y, method) ⇒ Object
Set alpha (make transparent) in image according to the specified colorization rule
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# File 'lib/rmagick_internal.rb', line 264 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.
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# File 'ext/RMagick/rmdraw.cpp', line 826
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=
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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())
{
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)
GVL_STRUCT_TYPE(AnnotateImage) args = { image, draw->info, exception };
#else
GVL_STRUCT_TYPE(AnnotateImage) args = { image, draw->info };
#endif
CALL_FUNC_WITHOUT_GVL(GVL_FUNC(AnnotateImage), &args);
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.
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# File 'lib/rmagick_internal.rb', line 271 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.
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# File 'lib/rmagick_internal.rb', line 279 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
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# File 'lib/rmagick_internal.rb', line 289 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.
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# File 'lib/rmagick_internal.rb', line 294 def clip_path(name) primitive "clip-path #{to_string(name)}" end |
#clip_rule(rule) ⇒ Object
Define the clipping rule.
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# File 'lib/rmagick_internal.rb', line 299 def clip_rule(rule) rule = to_string(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
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# File 'lib/rmagick_internal.rb', line 306 def clip_units(unit) unit = to_string(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.
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# File 'ext/RMagick/rmdraw.cpp', line 932
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
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# File 'lib/rmagick_internal.rb', line 314 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, composite_op = Magick::OverCompositeOp) ⇒ Magick::Draw
Draw the image.
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# File 'ext/RMagick/rmdraw.cpp', line 973
VALUE
Draw_composite(int argc, VALUE *argv, VALUE self)
{
Draw *draw;
const char *op;
double x, y, width, height;
CompositeOperator composite_op;
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]);
composite_op = OverCompositeOp;
if (argc == 6)
{
VALUE_TO_ENUM(argv[5], composite_op, CompositeOperator);
}
op = CommandOptionToMnemonic(MagickComposeOptions, composite_op);
if (rm_strcasecmp("Unrecognized", op) == 0)
{
rb_raise(rb_eArgError, "unknown composite operator (%d)", composite_op);
}
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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 = (struct 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)
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# File 'lib/rmagick_internal.rb', line 321 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 |
#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”.
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# File 'lib/rmagick_internal.rb', line 334 def define_clip_path(name) push('defs') push("clip-path #{enquote(name)}") push('graphic-context') yield ensure pop('graphic-context') pop('clip-path') pop('defs') end |
#draw(image_arg) ⇒ Magick::Draw
Execute the stored drawing primitives on the current image.
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# File 'ext/RMagick/rmdraw.cpp', line 1046
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);
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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();
GVL_STRUCT_TYPE(DrawImage) args = { image, draw->info, exception };
#else
GVL_STRUCT_TYPE(DrawImage) args = { image, draw->info };
#endif
CALL_FUNC_WITHOUT_GVL(GVL_FUNC(DrawImage), &args);
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.
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# File 'ext/RMagick/rmdraw.cpp', line 1096
VALUE
Draw_dup(VALUE self)
{
Draw *draw;
VALUE dup;
draw = ALLOC(Draw);
memset(draw, 0, sizeof(Draw));
dup = TypedData_Wrap_Struct(CLASS_OF(self), &rm_draw_data_type, 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
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# File 'lib/rmagick_internal.rb', line 346 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.
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# File 'lib/rmagick_internal.rb', line 355 def encoding(encoding) primitive "encoding #{to_string(encoding)}" end |
#fill(colorspec) ⇒ Object Also known as: fill_color, fill_pattern
Specify object fill, a color name or pattern name
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# File 'lib/rmagick_internal.rb', line 360 def fill(colorspec) primitive "fill #{enquote(colorspec)}" end |
#fill_opacity(opacity) ⇒ Object
Specify fill opacity (use “xx%” to indicate percentage)
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# File 'lib/rmagick_internal.rb', line 367 def fill_opacity(opacity) opacity = to_opacity(opacity) primitive "fill-opacity #{opacity}" end |
#fill_rule(rule) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 372 def fill_rule(rule) rule = to_string(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
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# File 'lib/rmagick_internal.rb', line 379 def font(name) primitive "font #{enquote(name)}" end |
#font_family(name) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 383 def font_family(name) primitive "font-family #{enquote(name)}" end |
#font_stretch(stretch) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 387 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_style(style) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 392 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_weight(weight) ⇒ Object
The font weight argument can be either a font weight constant or [100,200,…,900]
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# File 'lib/rmagick_internal.rb', line 399 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 |
#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.
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# File 'ext/RMagick/rmdraw.cpp', line 1155
VALUE
Draw_get_multiline_type_metrics(
int argc,
VALUE *argv,
VALUE self)
{
return get_type_metrics(argc, argv, self, GVL_FUNC(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.
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# File 'ext/RMagick/rmdraw.cpp', line 1128
VALUE
Draw_get_type_metrics(
int argc,
VALUE *argv,
VALUE self)
{
return get_type_metrics(argc, argv, self, GVL_FUNC(GetTypeMetrics));
}
|
#gravity(grav) ⇒ Object
Specify the text positioning gravity, one of: NorthWest, North, NorthEast, West, Center, East, SouthWest, South, SouthEast
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# File 'lib/rmagick_internal.rb', line 409 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 |
#image(composite, x, y, width, height, image_file_path) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 414 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.
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# File 'ext/RMagick/rmdraw.cpp', line 1171
VALUE Draw_init_copy(VALUE self, VALUE orig)
{
Draw *copy, *original;
TypedData_Get_Struct(orig, Draw, &rm_draw_data_type, original);
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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.
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# File 'ext/RMagick/rmdraw.cpp', line 1223
VALUE
Draw_inspect(VALUE self)
{
Draw *draw;
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, draw);
return draw->primitives ? draw->primitives : rb_str_new2("(no primitives defined)");
}
|
#interline_spacing(space) ⇒ Object
IM 6.5.5-8 and later
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# File 'lib/rmagick_internal.rb', line 421 def interline_spacing(space) primitive "interline-spacing #{Float(space)}" end |
#interword_spacing(space) ⇒ Object
IM 6.4.8-3 and later
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# File 'lib/rmagick_internal.rb', line 426 def interword_spacing(space) primitive "interword-spacing #{Float(space)}" end |
#kerning(space) ⇒ Object
IM 6.4.8-3 and later
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# File 'lib/rmagick_internal.rb', line 431 def kerning(space) primitive "kerning #{Float(space)}" end |
#line(start_x, start_y, end_x, end_y) ⇒ Object
Draw a line
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# File 'lib/rmagick_internal.rb', line 436 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
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.
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# File 'ext/RMagick/rmdraw.cpp', line 507
VALUE
Draw_marshal_dump(VALUE self)
{
Draw *draw;
VALUE ddraw;
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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("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("fill_pattern"), image_to_str(draw->info->fill_pattern));
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("decorate"), INT2FIX(draw->info->decorate));
rb_hash_aset(ddraw, CSTR2SYM("font"), MAGICK_STRING_TO_OBJ(draw->info->font));
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("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("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);
return ddraw;
}
|
#marshal_load(ddraw) ⇒ Magick::Draw
Load the marshalled object
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# File 'ext/RMagick/rmdraw.cpp', line 566
VALUE
Draw_marshal_load(VALUE self, VALUE ddraw)
{
Draw *draw;
VALUE val;
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, 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("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 = (MagickBooleanType)RTEST(rb_hash_aref(ddraw, CSTR2SYM("stroke_antialias")));
draw->info->text_antialias = (MagickBooleanType)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 = (ClipPathUnits)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.
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# File 'lib/rmagick_internal.rb', line 442 def opacity(opacity) opacity = to_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.
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# File 'lib/rmagick_internal.rb', line 450 def path(cmds) primitive "path #{enquote(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
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# File 'lib/rmagick_internal.rb', line 457 def pattern(name, x, y, width, height) push('defs') push("pattern #{to_string(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.
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# File 'lib/rmagick_internal.rb', line 469 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.
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# File 'lib/rmagick_internal.rb', line 475 def pointsize(points) primitive 'font-size ' + sprintf('%g', points) end |
#polygon(*points) ⇒ Object
Draw a polygon
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# File 'lib/rmagick_internal.rb', line 481 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
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# File 'lib/rmagick_internal.rb', line 491 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’)
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# File 'lib/rmagick_internal.rb', line 506 def pop(*what) if what.length.zero? primitive 'pop graphic-context' else primitive 'pop ' + what.map { |x| to_string(x) }.join(' ') end end |
#primitive(primitive) ⇒ Magick::Draw
Add a drawing primitive to the list of primitives in the Draw object.
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# File 'ext/RMagick/rmdraw.cpp', line 1259
VALUE
Draw_primitive(VALUE self, VALUE primitive)
{
Draw *draw;
rb_check_frozen(self);
TypedData_Get_Struct(self, Draw, &rm_draw_data_type, draw);
if (draw->primitives == (VALUE)0)
{
draw->primitives = primitive;
}
else
{
draw->primitives = rb_str_plus(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’)
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# File 'lib/rmagick_internal.rb', line 519 def push(*what) if what.length.zero? primitive 'push graphic-context' else primitive 'push ' + what.map { |x| to_string(x) }.join(' ') end end |
#rectangle(upper_left_x, upper_left_y, lower_right_x, lower_right_y) ⇒ Object
Draw a rectangle
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# File 'lib/rmagick_internal.rb', line 528 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
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# File 'lib/rmagick_internal.rb', line 536 def rotate(angle) primitive 'rotate ' + sprintf('%g', angle) end |
#roundrectangle(center_x, center_y, width, height, corner_width, corner_height) ⇒ Object
Draw a rectangle with rounded corners
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# File 'lib/rmagick_internal.rb', line 541 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.
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# File 'lib/rmagick_internal.rb', line 549 def scale(x, y) primitive 'scale ' + sprintf('%g,%g', x, y) end |
#skewx(angle) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 553 def skewx(angle) primitive 'skewX ' + sprintf('%g', angle) end |
#skewy(angle) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 557 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.
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# File 'lib/rmagick_internal.rb', line 562 def stroke(colorspec) primitive "stroke #{enquote(colorspec)}" end |
#stroke_antialias(bool) ⇒ Object
Specify if stroke should be antialiased or not
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# File 'lib/rmagick_internal.rb', line 569 def stroke_antialias(bool) bool = bool ? '1' : '0' primitive "stroke-antialias #{bool}" end |
#stroke_dasharray(*list) ⇒ Object
Specify a stroke dash pattern
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# File 'lib/rmagick_internal.rb', line 575 def stroke_dasharray(*list) if list.length.zero? primitive 'stroke-dasharray none' else list.map! { |x| Float(x) }.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
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# File 'lib/rmagick_internal.rb', line 587 def stroke_dashoffset(value = 0) primitive 'stroke-dashoffset ' + sprintf('%g', value) end |
#stroke_linecap(value) ⇒ Object
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# File 'lib/rmagick_internal.rb', line 591 def stroke_linecap(value) value = to_string(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
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# File 'lib/rmagick_internal.rb', line 597 def stroke_linejoin(value) value = to_string(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
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# File 'lib/rmagick_internal.rb', line 603 def stroke_miterlimit(value) value = Float(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)
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# File 'lib/rmagick_internal.rb', line 611 def stroke_opacity(opacity) opacity = to_opacity(opacity) primitive "stroke-opacity #{opacity}" end |
#stroke_width(pixels) ⇒ Object
Specify stroke (outline) width in pixels.
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# File 'lib/rmagick_internal.rb', line 617 def stroke_width(pixels) primitive 'stroke-width ' + sprintf('%g', pixels) end |
#text(x, y, text) ⇒ Object
Draw text at position x,y. Add quotes to text that is not already quoted.
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# File 'lib/rmagick_internal.rb', line 622 def text(x, y, text) text = to_string(text) Kernel.raise ArgumentError, 'missing text argument' if text.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
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# File 'lib/rmagick_internal.rb', line 641 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
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# File 'lib/rmagick_internal.rb', line 647 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.
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# File 'lib/rmagick_internal.rb', line 653 def text_antialias(boolean) boolean = boolean ? '1' : '0' primitive "text-antialias #{boolean}" end |
#text_undercolor(color) ⇒ Object
Specify color underneath text
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# File 'lib/rmagick_internal.rb', line 659 def text_undercolor(color) primitive "text-undercolor #{enquote(color)}" end |
#translate(x, y) ⇒ Object
Specify center of coordinate space to use for subsequent drawing commands.
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# File 'lib/rmagick_internal.rb', line 665 def translate(x, y) primitive 'translate ' + sprintf('%g,%g', x, y) end |