Start Method (original) (raw)
Syntax
Parameters
oldWidth
Specifies the original width of the image.
oldHeight
Specifies the original height of the image.
newWidth
Specifies the new width for the image.
newHeight
Specifies the new height for the image.
Example
using Leadtools;
using Leadtools.Codecs;
public void RasterBufferResizeExample()
{
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1.cmp");
string destFileName = Path.Combine(LEAD_VARS.ImagesDir, "Image1_resized.bmp");
using (RasterCodecs codecs = new RasterCodecs())
{
codecs.ThrowExceptionsOnInvalidImages = true;
// Load the source image
using (RasterImage srcImage = codecs.Load(srcFileName))
{
int destWidth = srcImage.Width / 2;
int destHeight = srcImage.Height / 2;
// Create the destination image
using (RasterImage destImage = new RasterImage(
RasterMemoryFlags.Conventional,
destWidth,
destHeight,
srcImage.BitsPerPixel,
srcImage.Order,
srcImage.ViewPerspective,
srcImage.GetPalette(),
IntPtr.Zero,
0))
{
// allocate buffer for one scanline from source image
byte[] scanLine = new byte[srcImage.BytesPerLine];
// resize it
RasterBufferResize bufferResize = new RasterBufferResize();
// Initialize the resize process.
bufferResize.Start(srcImage.Width, srcImage.Height, destImage.Width, destImage.Height);
srcImage.Access();
destImage.Access();
// Current destination row number
int destRow = 0;
for (int i = 0; i < srcImage.Height; i++)
{
// Get a scanline from the source image and resize it
srcImage.GetRow(i, scanLine, 0, srcImage.BytesPerLine);
bufferResize.ResizeBuffer(scanLine, 0, i, srcImage.BitsPerPixel);
// Output as many or as few rows as ResizeBuffer supplies
for (int j = 0; j < bufferResize.CopyRepetitions; j++)
{
destImage.SetRow(destRow, scanLine, 0, bufferResize.LineWidth * 3);
destRow++;
}
}
destImage.Release();
srcImage.Release();
bufferResize.Stop();
// Save the destination image
codecs.Save(destImage, destFileName, RasterImageFormat.Bmp, 24);
}
}
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
Leadtools Assembly