Hi,
* // cmsDoTransform(hTransform, sourcePtr, targetPtr, bytes);
It should not be number of bytes but number of píxels. Also, I think you lock
only the scanline, not the whole image.
Otherwise it looks fine to me, changing from bytes to scanline pixels should do
something. Then iterate for all scanlines,
Regards
Marti
From: liti1...@vipmail.hu [mailto:liti1...@vipmail.hu]
Sent: martes, 19 de enero de 2016 16:47
To: lcms-user@lists.sourceforge.net
Subject: [Lcms-user] Visual C# DLL function declaration
I am using Visual C# 2015 with .NET.
Made the lcms2.dll without any problem, and also half-made a new lcms2 "header"
for my C# project.
Most of the functions works fine - i can open and close profiles; get the infos
from them, etc. -, but i cannot program the InputBuffer and OutputBuffer of the
function *cmsDoTransform* in the right way.
If anybody familiar with this problem, please help me.
Here is a simple working example of the cmsGetProfileInfo function declaration:
[DllImport("lcms2.dll")]
public static extern UInt32 cmsGetProfileInfo(IntPtr hProfile, int
InfoType, string LanguageCode, string CountryCode,
[MarshalAsAttribute(UnmanagedType.LPWStr)] StringBuilder Buffer, int
BufferSize);
And like most of the other functions its works nice.
But i stucked in cmsDoTransform, and don't know what would be the ideal
declaration and usage. (Unmanaged Marshal attributes are one path, i tried a
few variations of it without any succes)
E.g.:
[DllImport("lcms2.dll")]
public static extern void cmsDoTransform(IntPtr hTransform, IntPtr
InputBuffer, IntPtr OutputBuffer,UInt32 Size);
or
[DllImport("lcms2.dll")]
public static extern void cmsDoTransform(IntPtr hTransform, char[]
InputBuffer, char[] OutputBuffer,UInt32 Size);
For pixel manipulation i use the following code:
Bitmap Source = new Bitmap("test.jpg", true);
Bitmap Target = new Bitmap(Source.Width, Source.Height,
PixelFormat.Format32bppArgb);
Rectangle r1 = new Rectangle(0, 0, Source.Width, Source.Height);
BitmapData sourceData = Source.LockBits(r1, ImageLockMode.ReadOnly,
sourcePixelFormat);
BitmapData targetData = Target.LockBits(r1, ImageLockMode.WriteOnly,
sourcePixelFormat);
IntPtr sourcePtr = sourceData.Scan0;
IntPtr targetPtr = targetData.Scan0;
int bytesPerPixel = ColorDepth / 8;
int bytes = Source.Width * bytesPerPixel * Source.Height;
byte[] colorValues = new byte[bytes];
Marshal.Copy(sourcePtr, colorValues, 0, bytes);
// Do stuffs here, like:
// cmsDoTransform(hTransform, sourcePtr, targetPtr, bytes); - Or using the
colorValues array, or ???
Marshal.Copy(colorValues, 0, targetPtr, bytes);
Source.UnlockBits(sourceData);
Target.UnlockBits(targetData);
...
During debug, i always got memory error on the second and third argument of the
cmsDoTransform function.
*Tamas*
------------------------------------------------------------------------------
Site24x7 APM Insight: Get Deep Visibility into Application Performance
APM + Mobile APM + RUM: Monitor 3 App instances at just $35/Month
Monitor end-to-end web transactions and take corrective actions now
Troubleshoot faster and improve end-user experience. Signup Now!
http://pubads.g.doubleclick.net/gampad/clk?id=267308311&iu=/4140
_______________________________________________
Lcms-user mailing list
Lcms-user@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/lcms-user
