From 0a70f99e51b0ea0c83288213e3b1f7904d78ede0 Mon Sep 17 00:00:00 2001
From: 13693261870 <252740454@qq.com>
Date: 星期四, 18 七月 2024 17:52:46 +0800
Subject: [PATCH] 创建PNG
---
SimuTools/Tools/GdalHelper.cs | 74 +++++++++++++++++++++++++++++--------
1 files changed, 58 insertions(+), 16 deletions(-)
diff --git a/SimuTools/Tools/GdalHelper.cs b/SimuTools/Tools/GdalHelper.cs
index 3da84f1..0a6e6ba 100644
--- a/SimuTools/Tools/GdalHelper.cs
+++ b/SimuTools/Tools/GdalHelper.cs
@@ -4,9 +4,6 @@
using System;
using System.Collections.Generic;
using System.IO;
-using System.Linq;
-using System.Text;
-using System.Threading.Tasks;
namespace SimuTools.Tools
{
@@ -83,9 +80,9 @@
Gdal.AllRegister();
}
- /**
- * 鑾峰彇Dataset鐨勬渶灏忕偣
- */
+ /// <summary>
+ /// 鑾峰彇Dataset鐨勬渶灏忕偣
+ /// </summary>
public static Geometry GetMinPoint(Dataset ds)
{
double[] transform = new double[6];
@@ -100,9 +97,9 @@
return Transform(ds, point);
}
- /**
- * 鑾峰彇Dataset鐨勬渶澶х偣
- */
+ /// <summary>
+ /// 鑾峰彇Dataset鐨勬渶澶х偣
+ /// </summary>
public static Geometry GetMaxPoint(Dataset ds)
{
/*
@@ -126,9 +123,9 @@
return Transform(ds, point);
}
- /**
- * 鍧愭爣杞崲
- */
+ /// <summary>
+ /// 鍧愭爣杞崲
+ /// </summary>
public static Geometry Transform(Dataset ds, Geometry point)
{
point.AssignSpatialReference(ds.GetSpatialRef());
@@ -151,9 +148,9 @@
return point;
}
- /**
- * 鍒涘缓閲戝瓧濉�
- */
+ /// <summary>
+ /// 鍒涘缓閲戝瓧濉�
+ /// </summary>
public static void CreatePyramid(String file)
{
Dataset ds = null;
@@ -164,7 +161,7 @@
ds = Gdal.Open(file, Access.GA_ReadOnly);
if (null == ds) return;
- Band band = ds.GetRasterBand(1);
+ OSGeo.GDAL.Band band = ds.GetRasterBand(1);
if (0 == band.GetOverviewCount())
{
ds.BuildOverviews("nearest", new int[] { 2, 4, 6, 8, 16 });
@@ -179,5 +176,50 @@
if (null != ds) ds.Dispose();
}
}
+
+ /// <summary>
+ /// 鍒涘缓PNG
+ /// </summary>
+ public void CreatePng(string filePath, int width, int height, int bands = 3)
+ {
+ // 鍒涘缓鍐呭瓨椹卞姩
+ OSGeo.GDAL.Driver memDriver = Gdal.GetDriverByName("MEM");
+ // 鍒涘缓鍐呭瓨鏁版嵁闆�
+ Dataset ds = memDriver.Create("mem::", width, height, bands, DataType.GDT_Byte, null);
+
+ // 璁剧疆鍥惧儚淇℃伅
+ for (int i = 1; i <= bands; i++)
+ {
+ Band band = ds.GetRasterBand(i);
+ band.SetRasterColorInterpretation((ColorInterp)i);
+ }
+
+ // 濉厖鍐呭瓨鍥惧儚
+ byte[] buffer = new byte[width * height * bands];
+ for (int i = 0; i < buffer.Length; i++)
+ {
+ buffer[i] = (byte)(i % 256);
+ }
+
+ // 鍐欏叆鍐呭瓨鍥惧儚
+ for (int i = 1; i <= bands; i++)
+ {
+ Band band = ds.GetRasterBand(i);
+ band.WriteRaster(0, 0, width, height, buffer, width, height, 0, 0);
+ }
+
+ // 鍒涘缓PNG椹卞姩
+ OSGeo.GDAL.Driver pngDriver = Gdal.GetDriverByName("PNG");
+
+ // 淇濆瓨涓篜NG鏂囦欢
+ //ds.SetProjection(Gdal.GetProjectionRef(""));
+ //ds.SetGeoTransform(Gdal.GetGeoTransform(""));
+ pngDriver.CreateCopy(filePath, ds, 0, null, null, null);
+ pngDriver.Dispose();
+
+ // 鍏抽棴鏁版嵁闆�
+ ds.Dispose();
+ memDriver.Dispose();
+ }
}
}
--
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