1,4,8,16,24,32位顏色之間的轉(zhuǎn)換
// 灰度 .299R + .587G + .114B
#define PIXEL_GREY(r,g,b) (u8)(((u16)r*77 + (u16)g*150 + (u16)b*29) >> 8)
// 獲得 R5G6B5 紅色分量
INLINE u8 R565( u16 clr )
{
return (clr & 0xF800 ) >> 8 ;
}
// 獲得 R5G6B5 綠色分量
INLINE u8 G565( u16 clr )
{
return (clr & 0x07E0 ) >> 3 ;
}
// 獲得 R5G6B5 藍(lán)色分量
INLINE u8 B565( u16 clr )
{
return (clr & 0x001F ) << 3 ;
}
// 獲得 A1R5G5B5 紅色分量
INLINE u8 R1555( u16 clr )
{
return (clr & 0x7C00 ) >> 7 ;
}
// 獲得 A1R5G5B5 綠色分量
INLINE u8 G1555( u16 clr )
{
return (clr & 0x03E0 ) >> 2 ;
}
// 獲得 A1R5G5B5 藍(lán)色分量
INLINE u8 B1555( u16 clr )
{
return (clr & 0x001F ) << 3 ;
}
// 獲得 A1R5G5B5 Alpha值
INLINE u8 A1555( u16 clr )
{
return clr & 0x8000 ? 255 : 0 ;
}
// 獲得 A4R4G4B4 紅色分量
INLINE u8 R4444( u16 clr )
{
return (clr & 0x0F00 ) >> 8 ;
}
// 獲得 A4R4G4B4 綠色分量
INLINE u8 G4444( u16 clr )
{
return (clr & 0x00F0 );
}
// 獲得 A4R4G4B4 藍(lán)色分量
INLINE u8 B4444( u16 clr )
{
return (clr & 0xF000 ) << 4 ;
}
// 獲得 A4R4G4B4 Alpha值
INLINE u8 A4444( u16 clr )
{
return (clr & 0xF000 ) >> 12 ;
}
// 由rgb組合成一個(gè)32位的RGB
INLINE u32 RGB32( u8 r, u8 g, u8 b )
{
return u32(r) << 16 | u32(g) << 8 | u32(b) | 0xFF000000 ;
}
// 由argb組合成一個(gè)32位的ARGB
INLINE u32 ARGB32( u8 a, u8 r, u8 g, u8 b )
{
return u32(a) << 24 | u32(r) << 16 | u32(g) << 8 | u32(b);
}
// ------------------------------------------------------------------------------------
// 1位轉(zhuǎn)換到4, 8, 16, 24, 32
// ------------------------------------------------------------------------------------
INLINE u16 _1_to_565( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 3 ) | ((pal[index].Green >> 2 ) << 5 ) | ((pal[index].Red >> 3 ) << 11 ) );
}
INLINE u16 _1_to_1555( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 3 ) | ((pal[index].Green >> 3 ) << 5 ) | ((pal[index].Red >> 3 ) << 10 ) | 0x8000 );
}
INLINE u16 _1_to_4444( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 4 ) | ((pal[index].Green >> 4 ) << 4 ) | ((pal[index].Red >> 4 ) << 8 ) | 0xF000 );
}
INLINE void _1_to_24( const PALETTE * pal, u16 index, u8 & r, u8 & g, u8 & b )
{
b = pal[index].Blue;
g = pal[index].Green;
r = pal[index].Red;
}
INLINE u32 _1_to_32( const PALETTE * pal, u16 index )
{
return ( pal[index].Blue | (pal[index].Green << 8 ) | (pal[index].Red << 16 ) );
}
// ------------------------------------------------------------------------------------
// 4位轉(zhuǎn)換到1, 8, 16, 24, 32
// ------------------------------------------------------------------------------------
INLINE u16 _4_to_565( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 3 ) | ((pal[index].Green >> 2 ) << 5 ) | ((pal[index].Red >> 3 ) << 11 ) );
}
INLINE u16 _4_to_1555( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 3 ) | ((pal[index].Green >> 3 ) << 5 ) | ((pal[index].Red >> 3 ) << 10 ) | 0x8000 );
}
INLINE u16 _4_to_4444( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 4 ) | ((pal[index].Green >> 4 ) << 4 ) | ((pal[index].Red >> 4 ) << 8 ) | 0xF000 );
}
INLINE void _4_to_24( const PALETTE * pal, u16 index, u8 & r, u8 & g, u8 & b )
{
b = pal[index].Blue;
g = pal[index].Green;
r = pal[index].Red;
}
INLINE u32 _4_to_32( const PALETTE * pal, u16 index )
{
return ( pal[index].Blue | (pal[index].Green << 8 ) | (pal[index].Red << 16 ) );
}
// ------------------------------------------------------------------------------------
// 8位轉(zhuǎn)換到16，24，32
// ------------------------------------------------------------------------------------
INLINE u16 _8_to_565( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 3 ) | ((pal[index].Green >> 2 ) << 5 ) | ((pal[index].Red >> 3 ) << 11 ) );
}
INLINE u16 _8_to_1555( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue) >> 3 | ((pal[index].Green >> 3 ) << 5 ) | ((pal[index].Red >> 3 ) << 10 ) | 0x8000 );
}
INLINE u16 _8_to_4444( const PALETTE * pal, u16 index )
{
return ( (pal[index].Blue >> 4 ) | ((pal[index].Green >> 4 ) << 4 ) | ((pal[index].Red >> 4 ) << 8 ) | 0xF000 );
}
INLINE void _8_to_24( const PALETTE * pal, u16 index, u8 & r, u8 & g, u8 & b )
{
b = pal[index].Blue;
g = pal[index].Green;
r = pal[index].Red;
}
INLINE u32 _8_to_32( const PALETTE * pal, u16 index )
{
return ( pal[index].Blue | (pal[index].Green << 8 ) | (pal[index].Red << 16 ) | 0xFF000000 );
}
// ------------------------------------------------------------------------------------
// 16位轉(zhuǎn)換到8，24，32
// ------------------------------------------------------------------------------------
INLINE u8 _565_to_8( u16 clr )
{
return PIXEL_GREY( (((clr & 0xF800 ) >> 11 ) * 0xFF ) / 0x1F ,
(((clr & 0x7E0 ) >> 5 ) * 0xFF ) / 0x3F ,
((clr & 0x1F ) * 0xFF ) / 0x1F );
}
INLINE u16 _565_to_1555( u16 clr )
{
return ( (clr & 0xF800 ) >> 1 | (clr >> 1 ) & 0x03E0 | (clr & 0x001F ) | 0x8000 );
}
INLINE u16 _565_to_4444( u16 clr )
{
return ( ((clr & 0xF800 ) >> 4 ) | ((clr & 0x07E0 ) >> 3 ) | ((clr & 0x001F ) >> 1 ) | 0xF000 );
}
INLINE void _565_to_24( u16 clr, u8 & r, u8 & g, u8 & b )
{
r = (u8)((clr & 0xF800 ) >> 11 );
g = (u8)((clr & 0x07E0 ) >> 5 );
b = (u8)((clr & 0x001F ) << 3 );
}
INLINE u32 _565_to_32( u16 clr )
{
return ( ((clr & 0x001F ) << 3 ) | ((clr & 0x07E0 ) << 5 ) | ((clr & 0xF800 ) << 8 ) | 0xFF000000 );
}
INLINE u8 _1555_to_8( u16 clr )
{
return PIXEL_GREY( (((clr & 0x7C00 ) >> 10 ) * 0xFF ) / 0x1F ,
(((clr & 0x3E0 ) >> 5 ) * 0xFF ) / 0x1F ,
((clr & 0x1F ) * 0xFF ) / 0x1F );
}
INLINE u16 _1555_to_565( u16 clr )
{
return (u16)( ((clr & 0x7C00 ) << 1 ) | ((clr & 0x03E0 ) << 1 ) | (clr & 0x001F ) );
}
INLINE u16 _1555_to_4444( u16 clr )
{
return ( ((clr & 0x7C00 ) >> 3 ) | ((clr & 0x03E0 ) >> 2 ) | ((clr & 0x001F ) >> 1 ) | 0xF000 );
}
INLINE void _1555_to_24( u16 clr, u8 & r, u8 & g, u8 & b )
{
r = (u8)((clr & 0x7C00 ) >> 10 );
g = (u8)((clr & 0x03E0 ) >> 5 );
b = (u8)((clr & 0x001F ) << 3 );
}
INLINE u32 _1555_to_32( u16 clr )
{
return ( ((clr & 0x001F ) << 3 ) | ((clr & 0x03E0 ) << 6 ) | ((clr & 0x7C00 ) << 9 ) | 0xFF000000 );
}
INLINE u16 _4444_to_565( u16 clr )
{
return ( ((clr & 0x000F ) << 1 ) | ((clr & 0x00F0 ) << 3 ) | ((clr & 0x0F00 ) << 4 ) );
}
INLINE u16 _4444_to_1555( u16 clr )
{
return ( ((clr & 0x000F ) << 1 ) | ((clr & 0x00F0 ) << 2 ) | ((clr & 0x0F00 ) << 3 ) | 0x8000 );
}
INLINE void _4444_to_24( u16 clr, u8 & r, u8 & g, u8 & b )
{
r = (u8)((clr & 0x0F00 ) >> 8 );
g = (u8)((clr & 0x00F0 ) >> 4 );
b = (u8)((clr & 0x000F ) << 4 );
}
INLINE u32 _4444_to_32( u16 clr )
{
return ( ((clr & 0x000F ) << 4 ) | ((clr & 0x00F0 ) << 8 ) | ((clr & 0x0F00 ) << 12 ) | ((clr & 0xF000 ) << 16 ) );
}
// ------------------------------------------------------------------------------------
// 24位轉(zhuǎn)換到8，16，32
// ------------------------------------------------------------------------------------
INLINE u8 _24_to_8( u8 r, u8 g, u8 b )
{
return PIXEL_GREY( b, g, r );
}
INLINE u16 _24_to_565( u8 r, u8 g, u8 b )
{
return ( ((u16)(r >> 3 ) << 11 ) | ((u16)(g >> 2 ) << 5 ) | ((u16)b >> 3 ) );
}
INLINE u16 _24_to_1555( u8 r, u8 g, u8 b )
{
return ( 0x8000 | ((u16)(r >> 3 ) << 10 ) | ((u16)(g >> 3 ) << 5 ) | ((u16)b >> 3 ) );
}
INLINE u16 _24_to_4444( u8 r, u8 g, u8 b )
{
return ( 0xF000 | ((u16)(r >> 4 ) << 8 ) | ((u16)(g >> 4 ) << 4 ) | ((u16)b >> 4 ) );
}
INLINE u32 _24_to_32( u8 r, u8 g, u8 b )
{
return ( 0xFF000000 | ((u16)r << 16 ) | ((u16)g << 8 ) | (u16)b );
}
// ------------------------------------------------------------------------------------
// 32位轉(zhuǎn)換到8，16，24
// ------------------------------------------------------------------------------------
INLINE u8 _32_to_8( u32 clr )
{
return PIXEL_GREY( (clr & 0xFF ), ((clr & 0xFF00 ) >> 8 ), ((clr & 0xFF0000 ) >> 16 ) );
}
INLINE u16 _32_to_565( u32 clr )
{
return (u16)( ((clr & 0xF8 ) >> 3 ) | ((clr & 0xFC00 ) >> 5 ) | ((clr & 0xF80000 ) >> 8 ) );
}
INLINE u16 _32_to_1555( u32 clr )
{
return (u16)( ((clr & 0xF8 ) >> 3 ) | ((clr & 0xF800 ) >> 6 ) | ((clr & 0xF80000 ) >> 9 ) | 0x8000 );
}
INLINE u16 _32_to_4444( u32 clr )
{
return (u16)( ((clr & 0xF0 ) >> 4 ) | ((clr & 0xF000 ) >> 8 ) | ((clr & 0xF00000 ) >> 12 ) | ((clr & 0xF0000000 ) >> 16 ) );
}
INLINE void _32_to_24( u32 clr, u8 & r, u8 & g, u8 & b )
{
b = (u8)(clr & 0xFF );
g = (u8)((clr & 0xFF00 ) >> 8 );
r = (u8)((clr & 0xFF0000 ) >> 16 );
}
本文來(lái)自CSDN博客，轉(zhuǎn)載請(qǐng)標(biāo)明出處：http://blog.csdn.net/check_into/archive/2007/08/17/1748630.aspx
