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2026-06-10

绘制圆形 - DrawCircle ​

函数简介 ​

在图片中绘制圆形，支持实线圆和填充圆，可指定颜色和透明度。

接口名称 ​

DrawCircle

DLL调用 ​

long DrawCircle(long ola, long ptr, int x, int y, int radius, int thickness, string color);

参数说明 ​

参数名类型说明
ola长整数型OLAPlug对象的指针，由 CreateCOLAPlugInterFace 接口生成。
ptr长整数型OLAImage对象的地址
x整数型圆心X坐标
y整数型圆心Y坐标
radius整数型圆的半径（像素）
thickness整数型线条粗细，正值为轮廓线条粗细，负值为绘制填充圆
color字符串填充的颜色，支持ARGB格式，如"#FFFFFFFF"

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF");
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF");
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF")
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF");
cpp
var ola = com("OlaPlug.OlaSoft")
var handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF")
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF")
text
.局部变量 ola, OLAPlug
ola.创建 ()
handle ＝ ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF")
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF");
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF")
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long handle = ola.DrawCircle(0, 100, 200, 0, 0, "#FFFFFFFF");

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
DrawCircle(instance, 0, 100, 200, 0, 0, "#FFFFFFFF");
csharp
using System.Runtime.InteropServices;
using System.Text;

[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long CreateCOLAPlugInterFace();
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern long DrawCircle(long ola, long ptr, int x, int y, int radius, int thickness, string color);

long instance = CreateCOLAPlugInterFace();
DrawCircle(instance, 0, 100, 200, 0, 0, "#FFFFFFFF");
python
from ctypes import CDLL, c_int, c_int64, create_string_buffer

ola = CDLL("OLAPlug_x64.dll")
ola.CreateCOLAPlugInterFace.restype = c_int64
instance = ola.CreateCOLAPlugInterFace()
ola.DrawCircle(instance, 0, 100, 200, 0, 0, "#FFFFFFFF")

返回值 ​

长整数型：返回新的OLAImage对象的地址。

注意事项 ​

  • 原图不会被修改，返回一个新的图片对象。
  • 返回的图片需调用 FreeImagePtr 释放内存。