CODEWITHSUNDEEP
c#image
Felipe
Felipe

Reputation: 303

How do I resize an image to fill the new dimensions?

I am trying to stretch an image to fit new dimensions, but I am not being able to figure out how to make the image to fill the new dimensions, it only creates a larger image size but it keeps the image untouched, I want the image to fill width and height specified.

 private Bitmap resizeImage(Image image, int width, int height, float HorizontalResolution, float VerticalResolution)
        {

            Rectangle destRect = new Rectangle(0, 0, width, height);

            Bitmap destImage = new Bitmap(width, height);

            destImage.SetResolution(HorizontalResolution, VerticalResolution);

            using (var graphics = Graphics.FromImage(destImage))
            {
                graphics.CompositingMode = CompositingMode.SourceCopy;
                graphics.CompositingQuality = CompositingQuality.HighQuality;
                graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
                graphics.SmoothingMode = SmoothingMode.HighQuality;
                graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;

                using (var wrapMode = new ImageAttributes())
                {
                    wrapMode.SetWrapMode(WrapMode.TileFlipXY);
                    graphics.DrawImage(image, destRect, 0, 0, image.Width, image.Height, GraphicsUnit.Pixel, wrapMode);
                }
            }

            return destImage;
        }

Upvotes: 0

Views: 1386

Answers (3)

Felipe
Felipe

Reputation: 303

Although none of the answers worked for me, I appreciate all the help and suggestions on which I could get to a solution pretty fast, here is the piece of code that worked for me:

private Bitmap resizeImage(Image image, int width, int height, float HorizontalResolution, float VerticalResolution)
{
    Rectangle destRect = new Rectangle(0, 0, width, height);
    Bitmap destImage = new Bitmap(width, height);

    destImage.SetResolution(HorizontalResolution, VerticalResolution);

    using (var graphics = Graphics.FromImage(destImage))
    {
         graphics.CompositingQuality = CompositingQuality.HighQuality;
         graphics.InterpolationMode = InterpolationMode.HighQualityBicubic;
         graphics.SmoothingMode = SmoothingMode.HighQuality;
         graphics.PixelOffsetMode = PixelOffsetMode.HighQuality;


         //drawImage must be set this way to get the desired outcome
         graphics.DrawImage(imageBox.Image, new Rectangle(0, 0, image.Width, image.Height), destRect, GraphicsUnit.Pixel);
    }

    return destImage;
}

Basically I removed the wrapMode code and changed my drawImage method.

Upvotes: 1

Ben Voigt
Ben Voigt

Reputation: 283634

Since you want to stretch the entire source image to a specified size, just use the simple five-argument overload that doesn't accept source coordinates:

Like so:

graphics.DrawImage(image, 0, 0, width, height);

Upvotes: 1

Akif
Akif

Reputation: 7640

You need to draw your image with the newer width and height. It will look like this:

  graphics.DrawImage(image, destRect, 0, 0, destRect.Width, destRect.Height, GraphicsUnit.Pixel, wrapMode);

Upvotes: 0

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