public CodecsTxtAntiAliasing AntiAliasing { get; set; }
@property (nonatomic, assign) LTCodecsTxtAntiAliasing AntiAliasing;
public CodecsTxtAntiAliasing isAntiAliasing()
public void setAntiAliasing(CodecsTxtAntiAliasing AntiAliasing)
public:
property CodecsTxtAntiAliasing^ AntiAliasing
{
CodecsTxtAntiAliasing^ get()
void set(CodecsTxtAntiAliasing^ value)
}
AntiAliasing # get and set (CodecsTxtLoadOptions)
This property affects the output only if the rendering engine supports it. GDI+ supports anti-aliasing, whereas SKIA does not.
Anti-aliasing smooths the text edges so the output looks better in 24/32-bit or 8-bit grayscale. But it can cause undesirable effects when the output is dithered down to fewer than 8-bits per pixel.
In particular, the output looks bad if the text files are loaded as 1-bit. In addition to looking bad, these 1-bit images will not compress efficiently using lossless compression techniques, such as fax CCITT G4. This is why it is sometimes desirable to turn anti-aliasing off.
Here are the possible values for this property:
Value | Description |
---|---|
CodecsTxtAntiAliasing.Auto | Let LEADTOOLS turn anti-aliasing on/off automatically (Default). In this case, anti-aliasing is enabled when loading at >= 8 bpp and disabled for < 8 bpp. |
CodecsTxtAntiAliasing.On | Always on |
CodecsTxtAntiAliasing.Off | Always off |
using Leadtools;
using Leadtools.Codecs;
using Leadtools.ImageProcessing.Core;
// Make sure the source file has at least one long line of text to see the effect of the Wrap property.
// Look at the result with 100% scale factor to see the effect of the AntiAliasing property.
public void CodecsTxtOptionsAntiAliasingExample()
{
string srcFileName = Path.Combine(LEAD_VARS.ImagesDir, "test.txt");
using (RasterCodecs codecs = new RasterCodecs())
{
/* Load the text file using the defaults (AntiAliasing + Wrap) */
using (RasterImage image = codecs.Load(srcFileName))
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "txt-Default.png"), RasterImageFormat.Png, 0);
/* Load the text file with no AntiAliasing + no Wrap */
codecs.Options.Txt.Load.AntiAliasing = CodecsTxtAntiAliasing.Off;
codecs.Options.Txt.Load.Wrap = false;
using (RasterImage image = codecs.Load(srcFileName))
codecs.Save(image, Path.Combine(LEAD_VARS.ImagesDir, "txt-NoAntiAlias-NoWrap.png"), RasterImageFormat.Png, 0);
}
}
static class LEAD_VARS
{
public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images";
}
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