DitheringMethod Property (original) (raw)
Summary
Gets or sets a value that specifies the default dithering method to use when converting an image from 64, 48, 32, 24, or 16 bits per pixel to 8 bits per pixel or fewer.
Syntax
C#
Objective-C
C++/CLI
Python
+(LTRasterDitheringMethod)ditheringMethod;
+(void)ditheringMethod:(LTRasterDitheringMethod)value;
Property Value
A RasterDitheringMethod enumeration value that specifies the default dithering method to use when converting an image from 64, 48, 32, 24, or 16 bits per pixel to 8 bits per pixel or fewer.
Example
using Leadtools;
using Leadtools.Codecs;
public void RasterDefaultsExample()
{
// Set the limit for RasterImage object allocations
RasterMemoryThreshold threshold = RasterDefaults.MemoryThreshold;
threshold.MaximumGlobalRasterImageMemory = 20 * 1000 * 1024;
RasterDefaults.MemoryThreshold = threshold;
ShowValues();
// Create a raster image with current DPI
RasterImage image1 = new RasterImage(
RasterMemoryFlags.Conventional,
100,
100,
24,
RasterByteOrder.Bgr,
RasterViewPerspective.TopLeft,
null,
IntPtr.Zero,
0);
Console.WriteLine("Resolution of created image is {0} by {1} DPI", image1.XResolution, image1.YResolution);
// Change the resolution
int xOldResolution = RasterDefaults.XResolution;
int yOldResolution = RasterDefaults.YResolution;
int xNewResolution = 196;
int yNewResolution = 196;
RasterDefaults.XResolution = xNewResolution;
RasterDefaults.YResolution = yNewResolution;
ShowValues();
// Create another raster image
// Create a raster image with current DPI
RasterImage image2 = new RasterImage(
RasterMemoryFlags.Conventional,
100,
100,
24,
RasterByteOrder.Bgr,
RasterViewPerspective.TopLeft,
null,
IntPtr.Zero,
0);
Console.WriteLine("Resolution of created image is {0} by {1} DPI", image2.XResolution, image2.YResolution);
Debug.Assert(image2.XResolution == xNewResolution);
Debug.Assert(image2.YResolution == yNewResolution);
// Reset old values
RasterDefaults.XResolution = xOldResolution;
RasterDefaults.YResolution = yOldResolution;
image1.Dispose();
image2.Dispose();
}
void ShowValues()
{
Console.WriteLine("Current defaults:");
Console.WriteLine("MaximumThreadCount: {0}", RasterDefaults.MaximumThreadCount);
Console.WriteLine("XResolution: {0}", RasterDefaults.XResolution);
Console.WriteLine("YResolution: {0}", RasterDefaults.YResolution);
Console.WriteLine("DitheringMethod: {0}", RasterDefaults.DitheringMethod);
Console.WriteLine("MemoryFlags: {0}", RasterDefaults.MemoryFlags);
RasterMemoryThreshold threshold = RasterDefaults.MemoryThreshold;
Console.WriteLine("MemoryThreshold.TiledThreshold: {0}", threshold.TiledThreshold);
Console.WriteLine("MemoryThreshold.MaximumConventionalSize: {0}", threshold.MaximumConventionalSize);
Console.WriteLine("MemoryThreshold.TileSize: {0}", threshold.TileSize);
Console.WriteLine("MemoryThreshold.ConventionalTiles: {0}", threshold.ConventionalTiles);
Console.WriteLine("MemoryThreshold.ConventionalBuffers: {0}", threshold.ConventionalBuffers);
Console.WriteLine("MemoryThreshold.MaximumGlobalRasterImageMemory: {0}", threshold.MaximumGlobalRasterImageMemory);
Console.WriteLine("TemporaryDirectory: {0}", RasterDefaults.TemporaryDirectory);
}
Leadtools Assembly