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调整图片大小 - ReSize

函数简介

将图片缩放到指定的宽度和高度。

接口名称

ReSize

DLL调用

long ReSize(long ola, long image_ptr, int new_width, int new_height);

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。
image_ptr长整数型要调整大小的图片句柄
new_width整数型目标宽度(像素)
new_height整数型目标高度(像素)

示例

SDK 调用

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long handle = ola.ReSize(0, 800, 600);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
long handle = ola.ReSize(0, 800, 600);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
handle = ola.ReSize(0, 800, 600)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
long handle = ola.ReSize(0, 800, 600);
cpp
var ola = com("OlaPlug.OlaSoft")
var handle = ola.ReSize(0, 800, 600)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
handle = ola.ReSize(0, 800, 600)
text
.局部变量 ola, OLAPlug
ola.创建 ()
handle = ola.ReSize(0, 800, 600)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var handle = ola.ReSize(0, 800, 600);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
长整数 handle = ola.ReSize(0, 800, 600)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
long handle = ola.ReSize(0, 800, 600);

原生 DLL 调用

cpp
long instance = CreateCOLAPlugInterFace();
ReSize(instance, 0, 800, 600);
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 ReSize(long ola, long image_ptr, int new_width, int new_height);

long instance = CreateCOLAPlugInterFace();
ReSize(instance, 0, 800, 600);
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.ReSize(instance, 0, 800, 600)

返回值

长整数型:成功返回新图片的句柄,失败返回0。

注意事项

  • 调整后返回新的图片句柄,原图片不会被修改。
  • 返回的图片需调用 FreeImagePtr 释放内存。
  • 为保持图片比例,建议使用等比例缩放。