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Improve channel conversions

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Brendan Zabarauskas 2012-11-30 15:12:38 +10:00
parent 6d3620c9d7
commit 03a1c4581d
1 changed files with 8 additions and 8 deletions
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16
src/color/channel.rs
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@ -42,7 +42,7 @@ pub impl u16: Channel {
#[inline(always)] static pure fn from_channel<T:Channel>(val: T) -> u16 { val.to_channel_u16() }
#[inline(always)] pure fn convert_channel<T:Channel>() -> T { from_channel(self) }
#[inline(always)] pure fn to_channel_u8() -> u8 { self / 0x100 as u8 }
#[inline(always)] pure fn to_channel_u8() -> u8 { (self >> 8) as u8 } // this is the equivalent of `self/256`. Some folks prefer to do `self/257`
#[inline(always)] pure fn to_channel_u16() -> u16 { self }
#[inline(always)] pure fn to_channel_u32() -> u32 { (self as u32 << 16) | self as u32 }
#[inline(always)] pure fn to_channel_u64() -> u64 { (self.to_channel_u32() as u64 << 32) | self.to_channel_u32() as u64 }
@ -59,8 +59,8 @@ pub impl u32: Channel {
#[inline(always)] static pure fn from_channel<T:Channel>(val: T) -> u32 { val.to_channel_u32() }
#[inline(always)] pure fn convert_channel<T:Channel>() -> T { from_channel(self) }
#[inline(always)] pure fn to_channel_u8() -> u8 { self / 0x1_0000_00 as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { self / 0x1_0000 as u16 }
#[inline(always)] pure fn to_channel_u8() -> u8 { (self >> 24) as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { (self >> 16) as u16 }
#[inline(always)] pure fn to_channel_u32() -> u32 { self }
#[inline(always)] pure fn to_channel_u64() -> u64 { (self as u64 << 32) | self as u64 }
#[inline(always)] pure fn to_channel_f32() -> f32 { self / 0xFFFF_FFFF as f32 }
@ -76,9 +76,9 @@ pub impl u64: Channel {
#[inline(always)] static pure fn from_channel<T:Channel>(val: T) -> u64 { val.to_channel_u64() }
#[inline(always)] pure fn convert_channel<T:Channel>() -> T { from_channel(self) }
#[inline(always)] pure fn to_channel_u8() -> u8 { self / 0x1_0000_0000_0000_00 as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { self / 0x1_0000_0000_0000 as u16 }
#[inline(always)] pure fn to_channel_u32() -> u32 { self / 0x1_0000_0000 as u32 }
#[inline(always)] pure fn to_channel_u8() -> u8 { (self >> 56) as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { (self >> 48) as u16 }
#[inline(always)] pure fn to_channel_u32() -> u32 { (self >> 32) as u32 }
#[inline(always)] pure fn to_channel_u64() -> u64 { self }
#[inline(always)] pure fn to_channel_f32() -> f32 { self / 0xFFFF_FFFF_FFFF_FFFF_u64 as f32 }
#[inline(always)] pure fn to_channel_f64() -> f64 { self / 0xFFFF_FFFF_FFFF_FFFF_u64 as f64 }
@ -94,8 +94,8 @@ pub impl f32: Channel {
#[inline(always)] pure fn convert_channel<T:Channel>() -> T { from_channel(self) }
#[inline(always)] pure fn to_channel_u8() -> u8 { self * (0xFFu8 as f32) as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { self * (0xFFFFu16 as f32) as u16 }
#[inline(always)] pure fn to_channel_u8() -> u8 { self * (0xFF_u8 as f32) as u8 }
#[inline(always)] pure fn to_channel_u16() -> u16 { self * (0xFFFF_u16 as f32) as u16 }
#[inline(always)] pure fn to_channel_u32() -> u32 { fail(~"to_channel_u32 not yet implemented for f32") }
#[inline(always)] pure fn to_channel_u64() -> u64 { fail(~"to_channel_u64 not yet implemented for f32") }
#[inline(always)] pure fn to_channel_f32() -> f32 { self }