1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
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
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/**
* Copyright: Mike Wey 2011
* License: zlib (See accompanying LICENSE file)
* Authors: Mike Wey
*/
module dmagick.DrawingContext;
import std.array;
import std.conv;
import std.string;
import dmagick.Color;
import dmagick.Exception;
import dmagick.Geometry;
import dmagick.Image;
import dmagick.Options;
import dmagick.Utils;
import dmagick.c.draw;
import dmagick.c.geometry;
import dmagick.c.type;
/**
* Drawable provides a convenient interface for preparing vector,
* image, or text arguments.
*/
class DrawingContext
{
string operations;
/**
* Apply the drawing context to the image.
*/
void draw(Image image)
{
copyString(image.options.drawInfo.primitive, operations);
DrawImage(image.imageRef, image.options.drawInfo);
DMagickException.throwException(&(image.imageRef.exception));
}
/**
* Transforms the coordinate system by a 3x3 transformation matrix.
*/
void affine(AffineMatrix matrix)
{
operations ~= format(" affine %s,%s,%s,%s,%s,%s",
matrix.sx, matrix.rx, matrix.ry, matrix.sy, matrix.tx, matrix.ty);
}
/**
* Draws an arc within a rectangle.
*/
void arc(size_t startX, size_t startY, size_t endX, size_t endY, double startDegrees, double endDegrees)
{
operations ~= format(" arc %s,%s %s,%s %s,%s",
startX, startY, endX, endY, startDegrees, endDegrees);
}
/**
* Draw a cubic Bezier curve.
*
* The arguments are pairs of points. At least 4 pairs must be specified.
* Each point xn, yn on the curve is associated with a control point
* cxn, cyn. The first point, x1, y1, is the starting point. The last
* point, xn, yn, is the ending point. Other point/control point pairs
* specify intermediate points on a polybezier curve.
*/
void bezier(size_t x1, size_t y1, size_t cx1, size_t cy1,
size_t cx2, size_t cy2, size_t x2, size_t y2,
size_t[] points ...)
in
{
assert ( points.length % 2 == 0,
"bezier needs an even number of argumants, "~
"each x coordinate needs a coresponding y coordinate." );
}
body
{
operations ~= format(" bezier %s,%s %s,%s %s,%s %s,%s",
x1, y1, cx1, cy1, cx2, cy2, x2, y2);
for( int i = 0; i < points.length; i+=2 )
operations ~= format(" %s,%s", points[i], points[i+1]);
}
/**
* Set the image border color. The default is "#dfdfdf".
*/
void borderColor(Color color)
{
operations ~= format(" border-color %s", color);
}
/**
* Defines a clip-path. Within the delegate, call other drawing
* primitive methods (rectangle, polygon, text, etc.) to define the
* clip-path. The union of all the primitives (excluding the effects
* of rendering methods such as stroke_width, etc.) is the clip-path.
*
* Params:
* path = The delegate that defines the clip-path using
* using the provided DrawingContext.
*/
void clipPath(void delegate(DrawingContext path) defineClipPath)
{
static size_t count;
DrawingContext path = new DrawingContext();
defineClipPath(path);
operations ~= format(" push defs push clip-path path%s push graphic-context", count);
operations ~= path.operations;
operations ~= " pop graphic-context pop clip-path pop defs";
operations ~= format(" clip-path url(#path%s)", count);
count++;
}
/**
* Specify how to determine if a point on the image is inside
* clipping region.
*
* See_Also: $(LINK2 http://www.w3.org/TR/SVG/painting.html#FillRuleProperty,
* the 'fill-rule' property) in the Scalable Vector Graphics (SVG)
* 1.1 Specification.
*/
void clipRule(ClipPathRule rule)
{
if ( rule == ClipPathRule.EvenOdd)
operations ~= " clip-rule evenodd";
else
operations ~= " clip-rule nonzero";
}
/**
* Defines the coordinate space within the clipping region.
*
* See_Also: $(LINK2 http://www.w3.org/TR/SVG/masking.html#EstablishingANewClippingPath,
* Establishing a New Clipping Path) in the
* Scalable Vector Graphics (SVG) 1.1 Specification.
*/
void clipUnits(ClipPathUnits units)
{
operations ~= format( " clip-units %s", toLower(to!(string)(units)) );
}
unittest
{
auto dc = new DrawingContext();
dc.clipUnits(ClipPathUnits.UserSpace);
assert(dc.operations == " clip-units userspace");
}
//circle
//color
//decorate
//ellipse
//encoding
//fill
//fill-opacity
//fill-rule
//font
//font-family
//font-size
//font-stretch
//font-style
//font-weight
//gradient-units
//gravity
//image
//interline-spacing
//interword-spacing
//kerning
//line
//matte
//offset
//opacity
//path
//point
//polyline
//polygon
//pop
//push
//rectangle
//rotate
//roundRectangle
//scale
//skewX
//skewY
//stop-color for gradients.
//stroke
//stroke-antialias
//stroke-dasharray
//stroke-dashoffset
//stroke-linecap
//stroke-linejoin
//stroke-miterlimit
//stroke-opacity
//stroke-width
//text
//text-align
//text-anchor
//text-antialias
//text-undercolor
//translate
//viewbox
}
enum ClipPathRule
{
EvenOdd,
NonZero
}
|
