The following is an example of how sub-classes of Drawable may be used:
#include <Magick++.h>
using namespace std;
using namespace Magick;
int main(int argc,char **argv)
{
// Create base image (white
image of 600 by 400 pixels)
Image image( Geometry(600,400),
Color("white") );
// Set draw options
image.penColor("red");
image.lineWidth(5) ;
// Draw a circle
image.draw( DrawableCircle(100,100,
150,150) );
// Draw a rectangle
image.draw( DrawableRectangle(200,200
300,300) );
// Display the result
image.display( );
}
Since Drawable is an object it may be saved in
an array or a list for later (perhaps repeated) use. Drawable depends on
the simple Coordinate structure (based on STL pair)which represents
a pair of x,y coodinates. The methods provided by the Coordinate
structure are shown in the following table:
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void | Default Constructor |
double x_, double y_ | Constructor, setting first & second | |
|
double x_ | x coordinate member |
|
double y_ | y coordinate member |
The Drawable classes are shown in the following
table:
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|
|
|
double startX_, double startY_, double endX_, double endY_, double startDegrees, double endDegrees_ | Draw an arc using the stroke color and based on the circle starting at coordinates startX_,startY_, and ending with coordinates endX_,endY_, and bounded by the rotational arc startDegrees_,endDegrees_ |
|
const std::list<Magick::Coordinate> &coordinates_ | Draw a bezier curve using the stroke color and based on the coordinates specified by the coordinates_ list. |
|
double originX_, double originY_, double perimX_, double perimY_ | Draw a circle using the stroke color and thickness using specified origin and perimeter coordinates. If a fill color is specified, then the object is filled. |
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double x_, double y_, PaintMethod paintMethod_ | Color image according to paintMethod. The point method recolors the target pixel. The replace method recolors any pixel that matches the color of the target pixel. Floodfill recolors any pixel that matches the color of the target pixel and is a neighbor, whereas filltoborder recolors any neighbor pixel that is not the border color. Finally, reset recolors all pixels. |
|
double originX_, double originY_, double width_, double height_, double arcStart_, double arcEnd_ | Draw an ellipse using the stroke color and thickness, specified origin, width & height, as well as specified start and end of arc in degrees. If a fill color is specified, then the object is filled. |
|
double x_, double y_, const string &image_ | Composite image (file) with image file at specified coordinates. |
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double startX_, double startY_, double endX_, double endY_ | Draw a line using stroke color and thickness using starting and ending coordinates |
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double x_, double y_, PaintMethod paintMethod_ | Change the pixel matte value to transparent. The point method changes the matte value of the target pixel. The replace method changes the matte value of any pixel that matches the color of the target pixel. Floodfill changes the matte value of any pixel that matches the color of the target pixel and is a neighbor, whereas filltoborder changes the matte value of any neighbor pixel that is not the border color, Finally reset changes the matte value of all pixels. |
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||
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double x_, double y_ | Draw a point using stroke color and thickness at coordinate |
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const std::list<Magick::Coordinate> &coordinates_ | Draw an arbitrary polygon using stroke color and thickness consisting of three or more coordinates contained in an STL list. If a fill color is specified, then the object is filled. |
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const std::list<Magick::Coordinate> &coordinates_ | Draw an arbitrary polyline using stroke color and thickness consisting of three or more coordinates contained in an STL list. If a fill color is specified, then the object is filled. |
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double upperLeftX_, double upperLeftY_, double lowerRightX_, double lowerRightY | Draw a rectangle using stroke color and thickness from upper-left coordinates to lower-right coordinates. If a fill color is specified, then the object is filled. |
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double centerX_, double centerY_, double width_, double hight_, double cornerWidth_, double cornerHeight_ | Draw a rounded rectangle using stroke color and thickness, with specified center coordinate, specified width and height, and specified corner width and height. If a fill color is specified, then the object is filled. |
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double x_, double y_, std::string text_ | Annotate image with text using stroke color, font, font pointsize, and box color (text background color), at specified coordinates. If text contains special format characters the image filename, type, width, height, or other image attributes may be incorporated in the text (see label()). |