org.easywatermark.core.provider

接口 GraphicsProvider

所有已知实现类:

AbstractWatermarkHandler, DocxWatermarkHandler, ImageWatermarkHandler, PdfWatermarkHandler

public interface GraphicsProvider

The GraphicsProvider interface defines methods for drawing text, images, and for performing rotation operations. This interface is designed to be used by classes that provide graphical drawing capabilities.

The methods in this interface take as parameters the coordinates of the upper left corner of the object to be drawn, the object itself (text or image), and the page number where the object is to be drawn. For text, there are methods for drawing a single line of text and for drawing multiple lines of text.

The rotation method allows to rotate the coordinate system by a specified angle around a specified point.

The origin of the coordinate system is the upper left corner.

从以下版本开始:

2024/04/11

作者:

zhangshukun

方法概要

限定符和类型	方法和说明
void	drawImage(float x, float y, byte[] data, int pageNumber) Draw image.
void	drawMultiLineString(float x, float y, List<String> text, int pageNumber) Draw multi-line text.
void	drawString(float x, float y, String text, int pageNumber) Draw text.
void	rotate(float angle, float x, float y, int pageNumber) Rotate the coordinate system.

方法详细资料

drawString

void drawString(float x,
                float y,
                String text,
                int pageNumber)

Draw text.

The upper left corner is the origin.

x, y is text upper left corner coordinate.

参数:

x - x coordinate

y - y coordinate

text - text

pageNumber - page number

drawMultiLineString

void drawMultiLineString(float x,
                         float y,
                         List<String> text,
                         int pageNumber)

Draw multi-line text.

The upper left corner is the origin. Default style: text-align:left;

x, y is text upper left corner coordinate.

参数:

x - x coordinate

y - y coordinate

text - text

pageNumber - page number

drawImage

void drawImage(float x,
               float y,
               byte[] data,
               int pageNumber)

Draw image.

The upper left corner is the origin.

x, y is text upper left corner coordinate.

参数:

x - x coordinate

y - y coordinate

data - image data

pageNumber - page number

rotate

void rotate(float angle,
            float x,
            float y,
            int pageNumber)

Rotate the coordinate system.

参数:

angle - The angle of clockwise rotation

x - rotate x

y - rotate y

pageNumber - page number