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HGScannerLib C#demo增加转Bitmap示例

This commit is contained in:
luoliangyi 2023-01-13 10:04:10 +08:00
parent c13ae3d1ff
commit 18a2552b5a
2 changed files with 50 additions and 0 deletions
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34
test/scannerlib/huagao/c#/WindowsFormsApp1/Form1.cs
View File

@ -32,6 +32,40 @@ namespace WindowsFormsApp1
saveParam.tiffJpegQuality = 80;
saveParam.ocr = 0;
HGScannerLib.HGLib_SaveImage(image, StringToUtf8("2.jpg"), ref saveParam);
IntPtr imageData = HGScannerLib.HGLib_GetImageData(image);
HGScannerLib.HGLibImageInfo imageInfo;
imageInfo.width = 0;
imageInfo.height = 0;
imageInfo.type = 0;
imageInfo.widthStep = 0;
imageInfo.origin = 0;
HGScannerLib.HGLib_GetImageInfo(image, ref imageInfo);
Bitmap curBitmap = new Bitmap((int)imageInfo.width, (int)imageInfo.height, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
Rectangle rect = new Rectangle(0, 0, (int)imageInfo.width, (int)imageInfo.height);
System.Drawing.Imaging.BitmapData bmpData = curBitmap.LockBits(rect, System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
unsafe
{
byte* dest = (byte*)(bmpData.Scan0);
byte* src = (byte*)imageData;
for (int i = 0; i < (int)imageInfo.height; i++)
{
for (int j = 0; j < (int)imageInfo.width; j++)
{
dest[i * bmpData.Stride + j * 3 + 0] = src[i * imageInfo.widthStep + j * 3 + 2];
dest[i * bmpData.Stride + j * 3 + 1] = src[i * imageInfo.widthStep + j * 3 + 1];
dest[i * bmpData.Stride + j * 3 + 2] = src[i * imageInfo.widthStep + j * 3 + 0];
}
}
}
curBitmap.UnlockBits(bmpData);
curBitmap.Save("3.jpg");
HGScannerLib.HGLib_ReleaseImage(image);
}

16
test/scannerlib/huagao/c#/WindowsFormsApp1/HGScannerLib.cs
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@ -18,6 +18,16 @@ namespace WindowsFormsApp1
public Int32 ocr;
}
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct HGLibImageInfo
{
public UInt32 width;
public UInt32 height;
public UInt32 type;
public UInt32 widthStep;
public UInt32 origin;
}
[StructLayout(LayoutKind.Sequential, Pack = 4)]
public struct HGLibDeviceIntValueList
{
@ -97,6 +107,12 @@ namespace WindowsFormsApp1
[DllImport("HGScannerLib.dll", EntryPoint = "HGLib_LoadImage")]
public static extern UIntPtr HGLib_LoadImage(IntPtr filePath);
[DllImport("HGScannerLib.dll", EntryPoint = "HGLib_GetImageData")]
public static extern IntPtr HGLib_GetImageData(UIntPtr image);
[DllImport("HGScannerLib.dll", EntryPoint = "HGLib_GetImageInfo")]
public static extern Int32 HGLib_GetImageInfo(UIntPtr image, ref HGLibImageInfo imageInfo);
[DllImport("HGScannerLib.dll", EntryPoint = "HGLib_SaveImage")]
public static extern Int32 HGLib_SaveImage(UIntPtr image, IntPtr filePath, ref HGLibSaveImageParam saveParam);