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Posted 15 Aug 2011

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Work with bitmaps faster in C#

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15 Aug 2011CPOL
You can increase the speed of both SetPixel and GetPixel by doing the following:Add the line 'int step = 0' at the LockBitmap class level.Remove 'int' declation of 'step' in the LockBits method and calculate as is.In both SetPixel and GetPixel, remove the line:int cCount = Depth /...

You can increase the speed of both SetPixel and GetPixel by doing the following:



  1. Add the line 'int step = 0' at the LockBitmap class level.
  2. Remove 'int' declation of 'step' in the LockBits method and calculate as is.
  3. In both SetPixel and GetPixel, remove the line:
  4. int cCount = Depth / 8;

  5. In both SetPixel and GetPixel, replace cCount with Step:
  6. //Get start index of the specified pixel
    int i = ((y * Width) + x) * cCount;

    now becomes:


    //Get start index of the specified pixel
    int i = ((y * Width) + x) * Step;

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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robertjb20
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