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2026-06-18

根据图片搜索字体 - SearchFontByImage ​

函数简介 ​

根据图片与已知文本，在候选字号、样式范围内搜索最匹配的系统字体与字号。

接口名称 ​

SearchFontByImage

DLL调用 ​

c
string SearchFontByImage(long ola, string imagePath, string knownText, string candidateFonts,
                         int minFontSize, int maxFontSize, int fontStyleMask, int topN);

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。
imagePath字符串图片路径。
knownText字符串图片中已知的文本内容。
candidateFonts字符串候选字体名列表，使用 `。
minFontSize整数型最小字号。
maxFontSize整数型最大字号。
fontStyleMask整数型样式位掩码（0 / 1 / 2 / 4 / 8 等可组合，具体含义以插件实现为准）。
topN整数型返回候选结果条数上限。

示例 ​

SDK 调用 ​

cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
std::string result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0);
csharp
using OLAPlug;

var ola = new OLAPlugServer();
string result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0);
python
from OLAPlugServer import OLAPlugServer

ola = OLAPlugServer()
result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0)
java
import com.olaplug.OLAPlugServer;

OLAPlugServer ola = new OLAPlugServer();
String result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0);
cpp
var ola = com("OlaPlug.OlaSoft")
var result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0)
vbscript
Set ola = CreateObject("OlaPlug.OlaSoft")
result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0)
text
.局部变量 ola, OLAPlug
ola.创建 ()
result ＝ ola.SearchFontByImage(“C:\\test.txt”, “value”, “value”, 0, 0, 0, 0)
aardio
import OLAPlugServer;
var ola = OLAPlugServer();
var result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0);
text
变量 ola <类型 = OLAPlugServer>
ola = 新建 OLAPlugServer
文本型 result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0)
cpp
#include "OLAPlugServer.h"

OLAPlugServer ola;
std::string result = ola.SearchFontByImage("C:\\test.txt", "value", "value", 0, 0, 0, 0);

原生 DLL 调用 ​

cpp
long instance = CreateCOLAPlugInterFace();
long ptr = SearchFontByImage(instance, "C:\\test.txt", "value", "value", 0, 0, 0, 0);
if (ptr != 0) {
    char buffer[512] = {0};
    GetStringFromPtr(ptr, buffer, sizeof(buffer));
    FreeStringPtr(ptr);
}
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 int GetStringFromPtr(long ptr, StringBuilder lpString, int size);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int FreeStringPtr(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int GetStringSize(long ptr);
[DllImport("OLAPlug_x64.dll", CallingConvention = CallingConvention.StdCall)]
static extern int SearchFontByImage(long ola, string imagePath, string knownText, string candidateFonts, int minFontSize, int maxFontSize, int fontStyleMask, int topN);

long instance = CreateCOLAPlugInterFace();
long ptr = SearchFontByImage(instance, "C:\\test.txt", "value", "value", 0, 0, 0, 0);
if (ptr != 0) {
    StringBuilder sb = new StringBuilder(GetStringSize(ptr) + 1);
    GetStringFromPtr(ptr, sb, sb.Capacity);
    FreeStringPtr(ptr);
    string result = sb.ToString();
}
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()
ptr = ola.SearchFontByImage(instance, "C:\\test.txt", "value", "value", 0, 0, 0, 0)
if ptr:
    buf = create_string_buffer(512)
    ola.GetStringFromPtr(ptr, buf, 512)
    ola.FreeStringPtr(ptr)
    result = buf.value.decode("utf-8")

返回值 ​

返回值说明
（返回值）字符串型：JSON，通常包含 bestFont、bestSize、bestScore、top 等字段（以实际返回为准）。