Class: Magick::Draw
- Inherits:
-
Object
- Object
- Magick::Draw
- 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
-
#affine(sx, rx, ry, sy, tx, ty) ⇒ Object
Apply coordinate transformations to support scaling (s), rotation ®, and translation (t).
-
#annotate(image_arg, width_arg, height_arg, x_arg, y_arg, text) ⇒ Object
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 ⇒ Object
Clones this object.
-
#color(x, y, method) ⇒ Object
Set color in image according to specified colorization rule.
-
#composite(*args) ⇒ Object
Implement the “image” drawing primitive.
-
#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) ⇒ Object
Execute the stored drawing primitives on the current image.
-
#dup ⇒ Object
Copy 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) ⇒ Object
Returns measurements for a given font and text string.
-
#get_type_metrics(*args) ⇒ Object
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.
-
#initialize ⇒ Object
constructor
Initialize Draw object.
-
#initialize_copy(orig) ⇒ Object
Initialize clone, dup methods.
-
#inspect ⇒ Object
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 ⇒ Object
Custom marshal for Draw objects.
-
#marshal_load(ddraw) ⇒ Object
Support Marsal.load.
-
#matte(x, y, method) ⇒ Object
Set matte (make transparent) in image according to the specified colorization rule.
-
#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) ⇒ Object
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(value) ⇒ 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.
Constructor Details
#initialize ⇒ Object
Initialize Draw object.
Ruby usage:
- @verbatim Draw#initialize <{ info initializers }> @endverbatim
1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 |
# File 'ext/RMagick/rmdraw.c', line 1495
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.
227 228 229 |
# File 'lib/rmagick_internal.rb', line 227 def affine(sx, rx, ry, sy, tx, ty) primitive 'affine ' + format('%g,%g,%g,%g,%g,%g', sx, rx, ry, sy, tx, ty) end |
#annotate(image_arg, width_arg, height_arg, x_arg, y_arg, text) ⇒ Object
Annotates an image with text.
Ruby usage:
- @verbatim Draw#annotate(img, w, h, x, y, text) <{optional parms}> @endverbatim
Notes:
- Additional Draw attribute methods may be called in the optional block,
which is executed in the context of an Draw object.
934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 |
# File 'ext/RMagick/rmdraw.c', line 934
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[50];
// 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())
{
(void)rb_obj_instance_eval(0, NULL, self);
}
// Translate & store in Draw structure
draw->info->text = InterpretImageProperties(NULL, image, StringValuePtr(text));
if (!draw->info->text)
{
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)
{
sprintf(geometry_str, "%+ld%+ld", x, y);
}
// WxH is non-zero
else
{
sprintf(geometry_str, "%lux%lu%+ld%+ld", width, height, x, y);
}
magick_clone_string(&draw->info->geometry, geometry_str);
(void) AnnotateImage(image, draw->info);
magick_free(draw->info->text);
draw->info->text = NULL;
draw->info->affine = keep;
rm_check_image_exception(image, RetainOnError);
return self;
}
|
#arc(start_x, start_y, end_x, end_y, start_degrees, end_degrees) ⇒ Object
Draw an arc.
232 233 234 235 |
# File 'lib/rmagick_internal.rb', line 232 def arc(start_x, start_y, end_x, end_y, start_degrees, end_degrees) primitive 'arc ' + format('%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.
238 239 240 241 242 243 244 245 |
# File 'lib/rmagick_internal.rb', line 238 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.join(',') end |
#circle(origin_x, origin_y, perim_x, perim_y) ⇒ Object
Draw a circle
248 249 250 |
# File 'lib/rmagick_internal.rb', line 248 def circle(origin_x, origin_y, perim_x, perim_y) primitive 'circle ' + format('%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.
253 254 255 |
# File 'lib/rmagick_internal.rb', line 253 def clip_path(name) primitive "clip-path #{name}" end |
#clip_rule(rule) ⇒ Object
Define the clipping rule.
258 259 260 261 |
# File 'lib/rmagick_internal.rb', line 258 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
264 265 266 267 |
# File 'lib/rmagick_internal.rb', line 264 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 ⇒ Object
Clones this object.
Ruby usage:
- @verbatim Draw#clone @endverbatim
1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 |
# File 'ext/RMagick/rmdraw.c', line 1015
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
271 272 273 274 |
# File 'lib/rmagick_internal.rb', line 271 def color(x, y, method) Kernel.raise ArgumentError, "Unknown PaintMethod: #{method}" unless PAINT_METHOD_NAMES.key?(method.to_i) primitive "color #{x},#{y},#{PAINT_METHOD_NAMES[method.to_i]}" end |
#composite(*args) ⇒ Object
Implement the “image” drawing primitive.
Ruby usage:
- @verbatim Draw#composite(x,y,width,height,img) @endverbatim
- @verbatim Draw#composite(x,y,width,height,img,operator) @endverbatim
Notes:
- Default operator is overComposite
- The "img" argument can be either an ImageList object or an Image
argument.
1049 1050 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 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 |
# File 'ext/RMagick/rmdraw.c', line 1049
VALUE
Draw_composite(int argc, VALUE *argv, VALUE self)
{
Draw *draw;
const char *op = "Over";
double x, y, width, height;
CompositeOperator cop = OverCompositeOp;
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]);
(void) rm_check_destroyed(image);
x = NUM2DBL(argv[0]);
y = NUM2DBL(argv[1]);
width = NUM2DBL(argv[2]);
height = NUM2DBL(argv[3]);
// The default composition operator is "Over".
if (argc == 6)
{
VALUE_TO_ENUM(argv[5], cop, CompositeOperator);
switch (cop)
{
case AddCompositeOp:
op = "Add";
break;
case AtopCompositeOp:
op = "Atop";
break;
case BlendCompositeOp:
op = "Blend";
break;
case BlurCompositeOp:
op = "Blur";
break;
case BumpmapCompositeOp:
op = "Bumpmap";
break;
case ChangeMaskCompositeOp:
op = "ChangeMask";
break;
case ClearCompositeOp:
op = "Clear";
break;
case ColorBurnCompositeOp:
op = "ColorBurn";
break;
case ColorDodgeCompositeOp:
op = "ColorDodge";
break;
case ColorizeCompositeOp:
op = "Colorize";
break;
case CopyBlackCompositeOp:
op = "CopyBlack";
break;
case CopyBlueCompositeOp:
op = "CopyBlue";
break;
case CopyCompositeOp:
op = "Copy";
break;
case CopyCyanCompositeOp:
op = "CopyCyan";
break;
case CopyGreenCompositeOp:
op = "CopyGreen";
break;
case CopyMagentaCompositeOp:
op = "CopyMagenta";
break;
case CopyOpacityCompositeOp:
op = "CopyOpacity";
break;
case CopyRedCompositeOp:
op = "CopyRed";
break;
case CopyYellowCompositeOp:
op = "CopyYellow";
break;
case DarkenCompositeOp:
op = "Darken";
break;
case DarkenIntensityCompositeOp:
op = "DarkenIntensity";
break;
case DistortCompositeOp:
op = "Distort";
break;
case DivideCompositeOp:
op = "Divide";
break;
case DivideSrcCompositeOp:
op = "DivideSrc";
break;
case DstCompositeOp:
op = "Dst";
break;
case DstAtopCompositeOp:
op = "DstAtop";
break;
case DstInCompositeOp:
op = "DstIn";
break;
case DstOutCompositeOp:
op = "DstOut";
break;
case DstOverCompositeOp:
op = "DstOver";
break;
case DifferenceCompositeOp:
op = "Difference";
break;
case DisplaceCompositeOp:
op = "Displace";
break;
case DissolveCompositeOp:
op = "Dissolve";
break;
case ExclusionCompositeOp:
op = "Exclusion";
break;
case HardLightCompositeOp:
op = "HardLight";
break;
#if defined(IMAGEMAGICK_GREATER_THAN_EQUAL_6_8_9)
case HardMixCompositeOp:
op = "HardMix";
break;
#endif
case HueCompositeOp:
op = "Hue";
break;
case InCompositeOp:
op = "In";
break;
case LightenCompositeOp:
op = "Lighten";
break;
case LightenIntensityCompositeOp:
op = "LightenIntensity";
break;
case LinearBurnCompositeOp:
op = "LinearBurn";
break;
case LinearDodgeCompositeOp:
op = "LinearDodge";
break;
case LinearLightCompositeOp:
op = "LinearLight";
break;
case LuminizeCompositeOp:
op = "Luminize";
break;
case MathematicsCompositeOp:
op = "Mathematics";
break;
case MinusCompositeOp:
op = "Minus";
break;
case MinusSrcCompositeOp:
op = "MinusSrc";
break;
case ModulateCompositeOp:
op = "Modulate";
break;
case MultiplyCompositeOp:
op = "Multiply";
break;
case NoCompositeOp:
op = "No";
break;
case OutCompositeOp:
op = "Out";
break;
case OverCompositeOp:
op = "Over";
break;
case OverlayCompositeOp:
op = "Overlay";
break;
case PegtopLightCompositeOp:
op = "PegtopLight";
break;
case PinLightCompositeOp:
op = "PinLight";
break;
case PlusCompositeOp:
op = "Plus";
break;
case ReplaceCompositeOp:
op = "Replace";
break;
case SaturateCompositeOp:
op = "Saturate";
break;
case ScreenCompositeOp:
op = "Screen";
break;
case SoftLightCompositeOp:
op = "SoftLight";
break;
case SrcCompositeOp:
op = "Src";
break;
case SrcAtopCompositeOp:
op = "SrcAtop";
break;
case SrcInCompositeOp:
op = "SrcIn";
break;
case SrcOutCompositeOp:
op = "SrcOut";
break;
case SrcOverCompositeOp:
op = "SrcOver";
break;
case SubtractCompositeOp:
op = "Subtract";
break;
case ThresholdCompositeOp:
op = "Threshold";
break;
case UndefinedCompositeOp:
op = "Undefined";
break;
case VividLightCompositeOp:
op = "VividLight";
break;
case XorCompositeOp:
op = "Xor";
break;
default:
rb_raise(rb_eArgError, "unknown composite operator (%d)", cop);
break;
}
}
Data_Get_Struct(self, Draw, draw);
// Create a temp copy of the composite image
Data_Get_Struct(image, Image, comp_img);
rm_write_temp_image(comp_img, 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)+strlen(name));
strcpy(tmpfile_name->name, name);
tmpfile_name->next = draw->tmpfile_ary;
draw->tmpfile_ary = tmpfile_name;
// Form the drawing primitive
(void) sprintf(primitive, "image %s %g,%g,%g,%g '%s'", op, x, y, width, height, name);
// Send "primitive" to self.
(void) 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)
278 279 280 281 282 283 284 |
# File 'lib/rmagick_internal.rb', line 278 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”.
291 292 293 294 295 296 297 298 299 300 |
# File 'lib/rmagick_internal.rb', line 291 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 |
#draw(image_arg) ⇒ Object
Execute the stored drawing primitives on the current image.
Ruby usage:
- @verbatim Draw#draw(i) @endverbatim
1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 |
# File 'ext/RMagick/rmdraw.c', line 1336
VALUE
Draw_draw(VALUE self, VALUE image_arg)
{
Draw *draw;
Image *image;
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), StringValuePtr(draw->primitives));
(void) DrawImage(image, draw->info);
rm_check_image_exception(image, RetainOnError);
magick_free(draw->info->primitive);
draw->info->primitive = NULL;
return self;
}
|
#dup ⇒ Object
Copy a Draw object.
Ruby usage:
- @verbatim Draw#dup @endverbatim
Notes:
- Constructs a new Draw object, then calls initialize_copy.
1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 |
# File 'ext/RMagick/rmdraw.c', line 1378
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);
if (rb_obj_tainted(self))
{
(void)rb_obj_taint(dup);
}
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
303 304 305 306 |
# File 'lib/rmagick_internal.rb', line 303 def ellipse(origin_x, origin_y, width, height, arc_start, arc_end) primitive 'ellipse ' + format('%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.
310 311 312 |
# File 'lib/rmagick_internal.rb', line 310 def encoding(encoding) primitive "encoding #{encoding}" end |
#fill(colorspec) ⇒ Object Also known as: fill_color, fill_pattern
Specify object fill, a color name or pattern name
315 316 317 |
# File 'lib/rmagick_internal.rb', line 315 def fill(colorspec) primitive "fill #{enquote(colorspec)}" end |
#fill_opacity(opacity) ⇒ Object
Specify fill opacity (use “xx%” to indicate percentage)
322 323 324 |
# File 'lib/rmagick_internal.rb', line 322 def fill_opacity(opacity) primitive "fill-opacity #{opacity}" end |
#fill_rule(rule) ⇒ Object
326 327 328 329 |
# File 'lib/rmagick_internal.rb', line 326 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
332 333 334 |
# File 'lib/rmagick_internal.rb', line 332 def font(name) primitive "font \'#{name}\'" end |
#font_family(name) ⇒ Object
336 337 338 |
# File 'lib/rmagick_internal.rb', line 336 def font_family(name) primitive "font-family \'#{name}\'" end |
#font_stretch(stretch) ⇒ Object
340 341 342 343 |
# File 'lib/rmagick_internal.rb', line 340 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
345 346 347 348 |
# File 'lib/rmagick_internal.rb', line 345 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]
352 353 354 355 356 357 358 |
# File 'lib/rmagick_internal.rb', line 352 def font_weight(weight) if FONT_WEIGHT_NAMES.key?(weight.to_i) primitive "font-weight #{FONT_WEIGHT_NAMES[weight.to_i]}" else primitive "font-weight #{weight}" end end |
#get_multiline_type_metrics(*args) ⇒ Object
Returns measurements for a given font and text string.
Ruby usage:
- @verbatim Draw#get_multiline_type_metrics(text) @endverbatim
- @verbatim Draw#get_multiline_type_metrics(image, text) @endverbatim
Notes:
- 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.
1442 1443 1444 1445 1446 1447 1448 1449 |
# File 'ext/RMagick/rmdraw.c', line 1442
VALUE
Draw_get_multiline_type_metrics(
int argc,
VALUE *argv,
VALUE self)
{
return get_type_metrics(argc, argv, self, GetMultilineTypeMetrics);
}
|
#get_type_metrics(*args) ⇒ Object
Returns measurements for a given font and text string.
Ruby usage:
- @verbatim Draw#get_type_metrics(text) @endverbatim
- @verbatim Draw#get_type_metrics(image, text) @endverbatim
Notes:
- 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.
1415 1416 1417 1418 1419 1420 1421 1422 |
# File 'ext/RMagick/rmdraw.c', line 1415
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
362 363 364 365 |
# File 'lib/rmagick_internal.rb', line 362 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 |
#initialize_copy(orig) ⇒ Object
Initialize clone, dup methods.
Ruby usage:
- @verbatim Draw#initialize_copy @endverbatim
1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 |
# File 'ext/RMagick/rmdraw.c', line 1464
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 ⇒ Object
Display the primitives.
Ruby usage:
- @verbatim Draw#inspect @endverbatim
they are not defined
1524 1525 1526 1527 1528 1529 1530 1531 |
# File 'ext/RMagick/rmdraw.c', line 1524
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
368 369 370 371 372 373 374 375 376 377 |
# File 'lib/rmagick_internal.rb', line 368 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 |
#interword_spacing(space) ⇒ Object
IM 6.4.8-3 and later
380 381 382 383 384 385 386 387 388 389 |
# File 'lib/rmagick_internal.rb', line 380 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 |
#kerning(space) ⇒ Object
IM 6.4.8-3 and later
392 393 394 395 396 397 398 399 400 401 |
# File 'lib/rmagick_internal.rb', line 392 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 |
#line(start_x, start_y, end_x, end_y) ⇒ Object
Draw a line
404 405 406 |
# File 'lib/rmagick_internal.rb', line 404 def line(start_x, start_y, end_x, end_y) primitive 'line ' + format('%g,%g %g,%g', start_x, start_y, end_x, end_y) end |
#marshal_dump ⇒ Object
Handle gradients when christy gets the new gradient support added (23Dec08)
Custom marshal for Draw objects.
Ruby usage:
- @verbatim Draw#marshal_dump @endverbatim
Notes:
- 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.
554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 |
# File 'ext/RMagick/rmdraw.c', line 554
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));
rb_hash_aset(ddraw, CSTR2SYM("opacity"), QUANTUM2NUM(draw->info->opacity));
// 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) ⇒ Object
Support Marsal.load.
Ruby usage:
- @verbatim Draw#marshal_load @endverbatim
Notes:
- On entry all fields are all-bits-0
639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 |
# File 'ext/RMagick/rmdraw.c', line 639
VALUE
Draw_marshal_load(VALUE self, VALUE ddraw)
{
Draw *draw;
VALUE val;
Data_Get_Struct(self, Draw, draw);
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")));
draw->info->opacity = NUM2QUANTUM(rb_hash_aref(ddraw, CSTR2SYM("opacity")));
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;
}
|
#matte(x, y, method) ⇒ Object
Set matte (make transparent) in image according to the specified colorization rule
410 411 412 413 |
# File 'lib/rmagick_internal.rb', line 410 def matte(x, y, method) Kernel.raise ArgumentError, 'Unknown paint method' unless PAINT_METHOD_NAMES.key?(method.to_i) primitive "matte #{x},#{y} #{PAINT_METHOD_NAMES[method.to_i]}" end |
#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.
417 418 419 420 421 422 |
# File 'lib/rmagick_internal.rb', line 417 def opacity(opacity) if opacity.is_a?(Numeric) Kernel.raise ArgumentError, 'opacity must be >= 0 and <= 1.0' if opacity < 0 || opacity > 1.0 end 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.
427 428 429 |
# File 'lib/rmagick_internal.rb', line 427 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
434 435 436 437 438 439 440 441 442 443 |
# File 'lib/rmagick_internal.rb', line 434 def pattern(name, x, y, width, height) push('defs') push("pattern #{name} #{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.
446 447 448 |
# File 'lib/rmagick_internal.rb', line 446 def point(x, y) primitive "point #{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.
452 453 454 |
# File 'lib/rmagick_internal.rb', line 452 def pointsize(points) primitive "font-size #{points}" end |
#polygon(*points) ⇒ Object
Draw a polygon
458 459 460 461 462 463 464 465 |
# File 'lib/rmagick_internal.rb', line 458 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.join(',') end |
#polyline(*points) ⇒ Object
Draw a polyline
468 469 470 471 472 473 474 475 |
# File 'lib/rmagick_internal.rb', line 468 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.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’)
483 484 485 486 487 488 489 490 |
# File 'lib/rmagick_internal.rb', line 483 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) ⇒ Object
Add a drawing primitive to the list of primitives in the Draw object.
Ruby usage:
- @verbatim Draw#primitive @endverbatim
1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 |
# File 'ext/RMagick/rmdraw.c', line 1570
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’)
497 498 499 500 501 502 503 504 |
# File 'lib/rmagick_internal.rb', line 497 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
507 508 509 510 |
# File 'lib/rmagick_internal.rb', line 507 def rectangle(upper_left_x, upper_left_y, lower_right_x, lower_right_y) primitive 'rectangle ' + format('%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
513 514 515 |
# File 'lib/rmagick_internal.rb', line 513 def rotate(angle) primitive "rotate #{angle}" end |
#roundrectangle(center_x, center_y, width, height, corner_width, corner_height) ⇒ Object
Draw a rectangle with rounded corners
518 519 520 521 |
# File 'lib/rmagick_internal.rb', line 518 def roundrectangle(center_x, center_y, width, height, corner_width, corner_height) primitive 'roundrectangle ' + format('%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.
524 525 526 |
# File 'lib/rmagick_internal.rb', line 524 def scale(x, y) primitive "scale #{x},#{y}" end |
#skewx(angle) ⇒ Object
528 529 530 |
# File 'lib/rmagick_internal.rb', line 528 def skewx(angle) primitive "skewX #{angle}" end |
#skewy(angle) ⇒ Object
532 533 534 |
# File 'lib/rmagick_internal.rb', line 532 def skewy(angle) primitive "skewY #{angle}" end |
#stroke(colorspec) ⇒ Object Also known as: stroke_color, stroke_pattern
Specify the object stroke, a color name or pattern name.
537 538 539 |
# File 'lib/rmagick_internal.rb', line 537 def stroke(colorspec) primitive "stroke #{enquote(colorspec)}" end |
#stroke_antialias(bool) ⇒ Object
Specify if stroke should be antialiased or not
544 545 546 547 |
# File 'lib/rmagick_internal.rb', line 544 def stroke_antialias(bool) bool = bool ? '1' : '0' primitive "stroke-antialias #{bool}" end |
#stroke_dasharray(*list) ⇒ Object
Specify a stroke dash pattern
550 551 552 553 554 555 556 557 558 559 |
# File 'lib/rmagick_internal.rb', line 550 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
562 563 564 |
# File 'lib/rmagick_internal.rb', line 562 def stroke_dashoffset(value = 0) primitive "stroke-dashoffset #{value}" end |
#stroke_linecap(value) ⇒ Object
566 567 568 569 |
# File 'lib/rmagick_internal.rb', line 566 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
571 572 573 574 |
# File 'lib/rmagick_internal.rb', line 571 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
576 577 578 579 |
# File 'lib/rmagick_internal.rb', line 576 def stroke_miterlimit(value) Kernel.raise ArgumentError, 'miterlimit must be >= 1' if value < 1 primitive "stroke-miterlimit #{value}" end |
#stroke_opacity(value) ⇒ Object
Specify opacity of stroke drawing color
(use "xx%" to indicate percentage)
583 584 585 |
# File 'lib/rmagick_internal.rb', line 583 def stroke_opacity(value) primitive "stroke-opacity #{value}" end |
#stroke_width(pixels) ⇒ Object
Specify stroke (outline) width in pixels.
588 589 590 |
# File 'lib/rmagick_internal.rb', line 588 def stroke_width(pixels) primitive "stroke-width #{pixels}" end |
#text(x, y, text) ⇒ Object
Draw text at position x,y. Add quotes to text that is not already quoted.
593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 |
# File 'lib/rmagick_internal.rb', line 593 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 #{x},#{y} #{text}" end |
#text_align(alignment) ⇒ Object
Specify text alignment relative to a given point
611 612 613 614 |
# File 'lib/rmagick_internal.rb', line 611 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
617 618 619 620 |
# File 'lib/rmagick_internal.rb', line 617 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.
623 624 625 626 |
# File 'lib/rmagick_internal.rb', line 623 def text_antialias(boolean) boolean = boolean ? '1' : '0' primitive "text-antialias #{boolean}" end |
#text_undercolor(color) ⇒ Object
Specify color underneath text
629 630 631 |
# File 'lib/rmagick_internal.rb', line 629 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.
635 636 637 |
# File 'lib/rmagick_internal.rb', line 635 def translate(x, y) primitive "translate #{x},#{y}" end |