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move implementation

This commit is contained in:
Vogel, Rick 2023-03-15 16:31:14 +01:00
parent 221f7ccbed
commit 9faaccbfc3
3 changed files with 131 additions and 143 deletions
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142
src/common/QskRgbLiterals.h
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@ -1,142 +0,0 @@
/******************************************************************************
* Copyright (C) 2023 Edelhirsch Software GmbH
* This file may be used under the terms of the 3-clause BSD License
*****************************************************************************/
#ifndef QSK_RGB_LITERALS_H
#define QSK_RGB_LITERALS_H
namespace QskRgb
{
namespace literals
{
/// @brief converts HTML #RRGGBB[AA] color hex string to Qt's RGB 0xAARRGGBB integer
/// @param str The string literal
/// @param len The length of the literal
/// @note non-hexadecimal characters are replaced with 0x0 value
constexpr unsigned int operator""_rgba( const char* const str, const size_t len )
{
if ( len != 7 && len != 9 )
{
return 0;
}
unsigned int rgb = 0x00;
// skip # character
for ( size_t i = 1; i < len; ++i )
{
switch ( str[ i ] )
{
case '0':
rgb = ( rgb << 4 ) | 0x0;
break;
case '1':
rgb = ( rgb << 4 ) | 0x1;
break;
case '2':
rgb = ( rgb << 4 ) | 0x2;
break;
case '3':
rgb = ( rgb << 4 ) | 0x3;
break;
case '4':
rgb = ( rgb << 4 ) | 0x4;
break;
case '5':
rgb = ( rgb << 4 ) | 0x5;
break;
case '6':
rgb = ( rgb << 4 ) | 0x6;
break;
case '7':
rgb = ( rgb << 4 ) | 0x7;
break;
case '8':
rgb = ( rgb << 4 ) | 0x8;
break;
case '9':
rgb = ( rgb << 4 ) | 0x9;
break;
case 'A':
case 'a':
rgb = ( rgb << 4 ) | 0xA;
break;
case 'B':
case 'b':
rgb = ( rgb << 4 ) | 0xB;
break;
case 'C':
case 'c':
rgb = ( rgb << 4 ) | 0xC;
break;
case 'D':
case 'd':
rgb = ( rgb << 4 ) | 0xD;
break;
case 'E':
case 'e':
rgb = ( rgb << 4 ) | 0xE;
break;
case 'F':
case 'f':
rgb = ( rgb << 4 ) | 0xF;
break;
default:
rgb = ( rgb << 4 ) | 0x0;
break;
}
}
// add default 0xFF for alpha channel
if ( len > 1 && len <= 7 )
{
rgb |= 0xFF000000;
}
// convert rrggbbaa to aarrggbb
if ( len > 7 )
{
rgb = ( 0x000000FF & rgb ) << 24 | ( rgb >> 8 );
}
return rgb;
}
// example for rgb
static_assert( "#123456"_rgba == 0xFF123456, "not constexpr" );
// example for rgba
static_assert( "#112233aa"_rgba == 0xAA112233, "not constexpr" );
// bad examples
static_assert( ""_rgba == 0x0, "not constexpr" );
static_assert( "#"_rgba == 0x0, "not constexpr" );
static_assert( "#1"_rgba == 0x0, "not constexpr" );
static_assert( "#12"_rgba == 0x0, "not constexpr" );
static_assert( "#123"_rgba == 0x0, "not constexpr" );
static_assert( "#1234"_rgba == 0x0, "not constexpr" );
static_assert( "#12345"_rgba == 0x0, "not constexpr" );
static_assert( "#112233a"_rgba == 0x0, "not constexpr" );
static_assert( "#fffffffff"_rgba == 0x0, "not constexpr" );
static_assert( "#WTF01337"_rgba == 0x3700F013, "not constexpr" );
static_assert( "#JUSTWHY?"_rgba == 0x0, "not constexpr" );
}
}
#endif

131
src/common/QskRgbValue.h
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@ -236,4 +236,135 @@ namespace QskRgb
#endif
namespace QskRgb
{
// Converts a HTML #RRGGBB[AA] color hex string to Qt's RGB 0xAARRGGBB integer
QSK_EXPORT Q_REQUIRED_RESULT constexpr QRgb fromHexString(
const char* const str, const size_t len ) noexcept
{
if ( len != 7 && len != 9 )
{
return 0;
}
if ( str[ 0 ] != '#' )
{
return 0;
}
QRgb rgb = 0x00;
for ( size_t i = 1; i < len; ++i )
{
switch ( str[ i ] )
{
case '0':
rgb = ( rgb << 4 ) | 0x0;
break;
case '1':
rgb = ( rgb << 4 ) | 0x1;
break;
case '2':
rgb = ( rgb << 4 ) | 0x2;
break;
case '3':
rgb = ( rgb << 4 ) | 0x3;
break;
case '4':
rgb = ( rgb << 4 ) | 0x4;
break;
case '5':
rgb = ( rgb << 4 ) | 0x5;
break;
case '6':
rgb = ( rgb << 4 ) | 0x6;
break;
case '7':
rgb = ( rgb << 4 ) | 0x7;
break;
case '8':
rgb = ( rgb << 4 ) | 0x8;
break;
case '9':
rgb = ( rgb << 4 ) | 0x9;
break;
case 'A':
case 'a':
rgb = ( rgb << 4 ) | 0xA;
break;
case 'B':
case 'b':
rgb = ( rgb << 4 ) | 0xB;
break;
case 'C':
case 'c':
rgb = ( rgb << 4 ) | 0xC;
break;
case 'D':
case 'd':
rgb = ( rgb << 4 ) | 0xD;
break;
case 'E':
case 'e':
rgb = ( rgb << 4 ) | 0xE;
break;
case 'F':
case 'f':
rgb = ( rgb << 4 ) | 0xF;
break;
default:
rgb = ( rgb << 4 ) | 0x0;
break;
}
}
// add default 0xFF for alpha channel
if ( len > 1 && len <= 7 )
{
rgb |= 0xFF000000;
}
// convert rrggbbaa to aarrggbb
if ( len > 7 )
{
rgb = ( 0x000000FF & rgb ) << 24 | ( rgb >> 8 );
}
return rgb;
}
namespace literals
{
Q_REQUIRED_RESULT constexpr QRgb operator""_rgba(
const char* const str, const size_t len ) noexcept
{
return fromHexString( str, len );
}
#define QSK_CHECK_CONSTEXPR_LITERAL
#ifdef QSK_CHECK_CONSTEXPR_LITERAL
// example for rgb with alpha channel set to 0xFF
static_assert( "#123456"_rgba == 0xFF123456, "not constexpr" );
// example for rgba
static_assert( "#112233AA"_rgba == 0xAA112233, "not constexpr" );
#endif
}
}
#endif

1
src/src.pro
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@ -40,7 +40,6 @@ HEADERS += \
common/QskPlacementPolicy.h \
common/QskPlatform.h \
common/QskRgbValue.h \
common/QskRgbLiterals.h \
common/QskScaleEngine.h \
common/QskScaleTickmarks.h \
common/QskShadowMetrics.h \