SourceAndConstAlpha Struct Reference

Public Functions
uchar	alpha (uchar src) const
quint16	bytemul (quint16 x) const
	SourceAndConstAlpha (int a)

Public Variables
int	m_alpha255
int	m_alpha256

Detailed Description

Definition at line 54 of file qblendfunctions.cpp.

Constructors and Destructors

SourceAndConstAlpha()

SourceAndConstAlpha::SourceAndConstAlpha ( int  a )

inline

Definition at line 56 of file qblendfunctions.cpp.

                               : m_alpha256(a) {
        m_alpha255 = (m_alpha256 * 255) >> 8;
    };

Functions

alpha()

uchar SourceAndConstAlpha::alpha ( uchar  src ) const

inline

Definition at line 59 of file qblendfunctions.cpp.

{ return (src * m_alpha256) >> 8; }

bytemul()

quint16 SourceAndConstAlpha::bytemul ( quint16  x ) const

inline

Definition at line 60 of file qblendfunctions.cpp.

                                            {
        uint t = (((x & 0x07e0)*m_alpha255) >> 8) & 0x07e0;
        t |= (((x & 0xf81f)*(m_alpha255>>2)) >> 6) & 0xf81f;
        return t;
    }

Properties

m_alpha255

int SourceAndConstAlpha::m_alpha255

Definition at line 65 of file qblendfunctions.cpp.

m_alpha256

int SourceAndConstAlpha::m_alpha256

Definition at line 66 of file qblendfunctions.cpp.

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The documentation for this struct was generated from the following file:

• /src/gui/painting/qblendfunctions.cpp