Vcl.Imaging.GIFImg.TColorReduction
Delphi
TColorReduction = (
rmNone, // Do not perform color reduction
rmWindows20, // Reduce to the Windows 20 color system palette
rmWindows256, // Reduce to the Windows 256 color halftone palette (Only works in 256 color display mode)
rmWindowsGray, // Reduce to the Windows 4 grayscale colors
rmMonochrome, // Reduce to a black/white monochrome palette
rmGrayScale, // Reduce to a uniform 256 shade grayscale palette
rmNetscape, // Reduce to the Netscape 216 color palette
rmQuantize, // Reduce to optimal 2^n color palette
rmQuantizeWindows, // Reduce to optimal 256 color windows palette
rmPalette // Reduce to custom palette
);
C++
enum DECLSPEC_DENUM TColorReduction : unsigned char { rmNone, rmWindows20, rmWindows256, rmWindowsGray, rmMonochrome, rmGrayScale, rmNetscape, rmQuantize, rmQuantizeWindows, rmPalette };
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| enum | public | Vcl.Imaging.GIFImg.pas Vcl.Imaging.GIFImg.hpp |
Vcl.Imaging.GIFImg | Vcl.Imaging.GIFImg |
Description
Specifies the available color reduction methods.
A variable of type TColorReduction specifies the color reduction method to use when optimizing or reducing the palette of an image.
For example, the ReduceColors routine can be used to reduce the colors of a TBitmap.
The following table lists the possible values of a variable of type TColorReduction.
| Value | Meaning |
|---|---|
|
rmNone |
Do not perform any color reduction. |
|
rmWindows20 |
Reduce to the Windows 20 color system palette. |
|
rmWindows256 |
Reduce to the Windows 256 color halftone palette. This only works in 256 color display mode. |
|
rmWindowsGray |
Reduce to the Windows 4 grayscale colors. |
|
rmMonochrome |
Reduce to a black/white monochrome palette. |
|
rmGrayScale |
Reduce to a uniform 256 shade grayscale palette. |
|
rmNetscape |
Reduce to the Netscape 216 color palette. |
|
rmQuantize |
Reduce to an optimal 2^n color palette. |
|
rmQuantizeWindows |
Reduce to an optimal 256 color windows palette. |
|
rmPalette |
Reduce to a custom palette. |