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Vcl.Graphics.TAlphaFormat
From XE2 API Documentation
Delphi
type TAlphaFormat = (afIgnored, afDefined, afPremultiplied)
C++
enum TAlphaFormat : unsigned char { afIgnored, afDefined, afPremultiplied };
Properties
| Type | Visibility | Source | Unit | Parent |
|---|---|---|---|---|
| enum | public | Vcl.Graphics.pas Vcl.Graphics.hpp |
Vcl.Graphics | Vcl.Graphics |
Description
TAlphaFormat indicates how the reserved byte of each pixel is used in a 32 bit bitmap.
TAlphaFormat has the following values:
| Value | Meaning |
|---|---|
|
afIgnored |
The Reserved byte in the TRGBQuad is ignored. |
|
afDefined |
The reserved byte in the TRGBQuad contains an alpha value. |
|
afPremultiplied |
The reserved byte in the TRGBQuad contains an alpha value. The red, green, and blue values have been premultiplied with the alpha value. |