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Shadow with blending option

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vandna  
#1 Posted : 18 years ago
vandna

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Joined: 1/4/2007(UTC)
Posts: 23
Hi,

I want to apply shadow to a CMYK image and also, want to give a blending option - Multiply (as in Photoshop). How can I acheive it through Aurigma?

Thanks
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vandna  
#2 Posted : 18 years ago
vandna

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Joined: 1/4/2007(UTC)
Posts: 23
Please let me know if it is acheivable using Aurigma?
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Dmitry  
#3 Posted : 18 years ago
Dmitry

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Hello,

The both of features are available with Graphics Mill for .NET. Here are the code snippets which illustrates how to perform these actions:

  • Draw one image on another using "multiply" combine mode:
    Code:
    // CMYK image
Aurigma.GraphicsMill.Bitmap bitmap1 = new Aurigma.GraphicsMill.Bitmap(@"d:/temp/testimages/sourse_image(CMYK).jpg");
// RGB image
Aurigma.GraphicsMill.Bitmap bitmap2 = new Aurigma.GraphicsMill.Bitmap(@"d:/temp/wizard.jpg");
	
// Images should have the same pixel format, so convert bitmap2 to CMYK.
bitmap2.ColorManagement.ConvertToContinuous(Aurigma.GraphicsMill.ColorSpace.Cmyk, false, false);
	
// Draw bitmap 2 onto bitmap1 using multiply combine mode.
bitmap2.Draw(bitmap1, 0, 0, 100, 100, Aurigma.GraphicsMill.Transforms.CombineMode.Multiply, 1.0f, Aurigma.GraphicsMill.Transforms.InterpolationMode.MediumQuality);
	
// Save the result.
bitmap1.Save(@"d:/temp/multiply.jpg");
  • Draw black shadow on CMYK image:
    Code:
    Aurigma.GraphicsMill.Bitmap srcBitmap = new Aurigma.GraphicsMill.Bitmap(@"d:/temp/testimages/sourse_image(CMYK).jpg");
srcBitmap.Transforms.Shadow(Aurigma.GraphicsMill.CmykColor.FromCmyk(0, 0, 0, 255), 50, 50);
srcBitmap.Save(@"d:/temp/shadow.tif");

    • Edited by user 17 years ago  | Reason: Not specified

    Sincerely yours,

    Dmitry Sevostyanov

    UserPostedImage Follow Aurigma on Twitter!
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    vandna  
    #4 Posted : 18 years ago
    vandna

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    Joined: 1/4/2007(UTC)
    Posts: 23
    Hi,

    This is not what I want.Please understand that I want to create a shadow on the image but the shoadow blending option should be multipy (as in Photoshop).Currently, the shadow is in Normal mode.
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    Dmitry  
    #5 Posted : 18 years ago
    Dmitry

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    Joined: 8/3/2003(UTC)
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    Was thanked: 12 time(s) in 12 post(s)
    Hello,

    To perform your task you should:

    1. Add shadow to your bitmap,

    2. Draw shadowed bitmap on result one using "multiply" combine mode,

    3. Draw original bitmap on result bitmap with combine mode "alpha".

    Here is code sample which illustrates this approach:

    Code:
    // Source bitmap
Aurigma.GraphicsMill.Bitmap srcBitmap = new Aurigma.GraphicsMill.Bitmap(@"d:/images/test/transptest.png");
	
// Bitmap with shadow
Aurigma.GraphicsMill.Bitmap shadowBitmap = (Aurigma.GraphicsMill.Bitmap)srcBitmap.Clone();
shadowBitmap.Transforms.Shadow(Aurigma.GraphicsMill.RgbColor.Green, 50, 50, 5, false);
	
// Result bitmap
Aurigma.GraphicsMill.Bitmap resultBitmap = new Aurigma.GraphicsMill.Bitmap(Aurigma.GraphicsMill.RgbColor.White,  
    shadowBitmap.Width, shadowBitmap.Height, shadowBitmap.PixelFormat);
	
// Draw bitmap with shadows onto result bitmap using combine mode "multiply"
shadowBitmap.Draw(resultBitmap, 0, 0, shadowBitmap.Width, shadowBitmap.Height,  
    Aurigma.GraphicsMill.Transforms.CombineMode.Multiply, 1.0f, 
    Aurigma.GraphicsMill.Transforms.InterpolationMode.LowQuality);
	
// Draw source bitmap onto result one with combine mode "alpha"
srcBitmap.Draw(resultBitmap, 0, 0, srcBitmap.Width, srcBitmap.Height, 
    Aurigma.GraphicsMill.Transforms.CombineMode.Alpha, 1.0f, 
    Aurigma.GraphicsMill.Transforms.InterpolationMode.LowQuality);

resultBitmap.Save(@"d:/shadow.png");

    Edited by user 17 years ago  | Reason: Not specified

    Sincerely yours,

    Dmitry Sevostyanov

    UserPostedImage Follow Aurigma on Twitter!
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    vandna  
    #6 Posted : 18 years ago
    vandna

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    Joined: 1/4/2007(UTC)
    Posts: 23
    Hi,

    Thanks for your prompt reply. This is wonderful.

    Aurigma rocks and so do you.
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    vandna  
    #7 Posted : 18 years ago
    vandna

    Rank: Member

    Groups: Guest
    Joined: 1/4/2007(UTC)
    Posts: 23
    Hi,

    I was able to acheive the desired effect in case of png. But how to acheive it when the background is in CMYK format and I want to draw a CMYK image over it with the shadow blended in Multiply mode. Please provide with a code sample to acheive the same.
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    Dmitry  
    #8 Posted : 18 years ago
    Dmitry

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    Joined: 8/3/2003(UTC)
    Posts: 1,070

    Thanks: 1 times
    Was thanked: 12 time(s) in 12 post(s)
    Hello,

    Unfortunately "multiply" combine mode is not available for CMYK images. If you really need for this feature, contact us on sales@aurigma.com.

    Edited by user 17 years ago  | Reason: Not specified

    Sincerely yours,

    Dmitry Sevostyanov

    UserPostedImage Follow Aurigma on Twitter!
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