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add channel format argument

This commit is contained in:
Vogel, Rick 2023-03-24 16:42:05 +01:00
parent 5ac7be697a
commit 809966a220
2 changed files with 58 additions and 47 deletions
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71
src/common/QskRgbValue.h
View File

@ -238,97 +238,113 @@ namespace QskRgb
namespace QskRgb
{
enum Format
{
ARGB,
RGBA
};
// Converts a '#12345678' color hex string to a '0x12345678' unsigned integer
QSK_EXPORT constexpr QRgb fromHexString( const char* const str, const size_t len ) noexcept
QSK_EXPORT constexpr QRgb fromHexString(
const char* const str, const size_t len, const Format format ) noexcept
{
if ( ( len != 9 && len != 7 ) || str[ 0 ] != '#' )
{
return 0;
}
QRgb argb = 0xFF;
QRgb c = 0xFF;
for ( size_t i = 1; i < len; ++i )
{
switch ( str[ i ] )
{
case '0':
argb = ( argb << 4 ) | 0x0;
c = ( c << 4 ) | 0x0;
break;
case '1':
argb = ( argb << 4 ) | 0x1;
c = ( c << 4 ) | 0x1;
break;
case '2':
argb = ( argb << 4 ) | 0x2;
c = ( c << 4 ) | 0x2;
break;
case '3':
argb = ( argb << 4 ) | 0x3;
c = ( c << 4 ) | 0x3;
break;
case '4':
argb = ( argb << 4 ) | 0x4;
c = ( c << 4 ) | 0x4;
break;
case '5':
argb = ( argb << 4 ) | 0x5;
c = ( c << 4 ) | 0x5;
break;
case '6':
argb = ( argb << 4 ) | 0x6;
c = ( c << 4 ) | 0x6;
break;
case '7':
argb = ( argb << 4 ) | 0x7;
c = ( c << 4 ) | 0x7;
break;
case '8':
argb = ( argb << 4 ) | 0x8;
c = ( c << 4 ) | 0x8;
break;
case '9':
argb = ( argb << 4 ) | 0x9;
c = ( c << 4 ) | 0x9;
break;
case 'A':
case 'a':
argb = ( argb << 4 ) | 0xA;
c = ( c << 4 ) | 0xA;
break;
case 'B':
case 'b':
argb = ( argb << 4 ) | 0xB;
c = ( c << 4 ) | 0xB;
break;
case 'C':
case 'c':
argb = ( argb << 4 ) | 0xC;
c = ( c << 4 ) | 0xC;
break;
case 'D':
case 'd':
argb = ( argb << 4 ) | 0xD;
c = ( c << 4 ) | 0xD;
break;
case 'E':
case 'e':
argb = ( argb << 4 ) | 0xE;
c = ( c << 4 ) | 0xE;
break;
case 'F':
case 'f':
argb = ( argb << 4 ) | 0xF;
c = ( c << 4 ) | 0xF;
break;
default:
argb = ( argb << 4 ) | 0x0;
c = ( c << 4 ) | 0x0;
break;
}
}
return argb;
switch ( format )
{
case ARGB:
return c;
case RGBA:
return len == 9 ? qRgba( qAlpha( c ), qRed( c ), qGreen( c ), qBlue( c ) )
: qRgba( qRed( c ), qGreen( c ), qBlue( c ), 255 );
}
return 0;
}
namespace literals
@ -383,17 +399,14 @@ namespace QskRgb
QSK_EXPORT constexpr QRgb operator""_rgba(
const char* const str, const size_t len ) noexcept
{
constexpr auto rrggbbaa = 9;
const auto c = fromHexString( str, len );
return len == rrggbbaa ? qRgba( qAlpha( c ), qRed( c ), qGreen( c ), qBlue( c ) )
: qRgba( qRed( c ), qGreen( c ), qBlue( c ), qAlpha( c ) );
return fromHexString( str, len, RGBA );
}
// converts a hex string from '#[AA]RRGGBB' to '0xAARRGGBB' integer
QSK_EXPORT constexpr QRgb operator""_argb(
const char* const str, const size_t len ) noexcept
{
return fromHexString( str, len );
return fromHexString( str, len, ARGB );
}
// converts a hex literal from '0xRRGGBB[AA]' to '0xAARRGGBB' integer
@ -428,17 +441,15 @@ namespace QskRgb
QSK_EXPORT constexpr QColor operator""_rgba(
const char* const str, const size_t len ) noexcept
{
constexpr auto rrggbbaa = 9;
const auto c = fromHexString( str, len );
return len == rrggbbaa ? QColor{ qAlpha( c ), qRed( c ), qGreen( c ), qBlue( c ) }
: QColor{ qRed( c ), qGreen( c ), qBlue( c ), qAlpha( c ) };
const auto c = fromHexString( str, len, RGBA );
return QColor{ qRed( c ), qGreen( c ), qBlue( c ), qAlpha( c ) };
}
// converts a hex string from '#[AA]RRGGBB' to a QColor
QSK_EXPORT constexpr QColor operator""_argb(
const char* const str, const size_t len ) noexcept
{
const auto c = fromHexString( str, len );
const auto c = fromHexString( str, len, ARGB );
return QColor{ qRed( c ), qGreen( c ), qBlue( c ), qAlpha( c ) };
}

2
tests/test_QskRgbLiterals.cpp
View File

@ -52,7 +52,7 @@ void QskRgbLiterals::parsing()
QFETCH( QRgb, expected );
const auto actual = text.toStdString();
QCOMPARE( QskRgb::fromHexString( actual.c_str(), actual.size() ), expected );
QCOMPARE( QskRgb::fromHexString( actual.c_str(), actual.size(), QskRgb::ARGB ), expected );
}
void QskRgbLiterals::qrgbLiterals_data()