Move

Concepts
concept	Haio::Codecs::Movable

Functions
template<>
Result< void >	Haio::Codecs::Move< Color::BGR888, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::BGRA8888, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::ETC1, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::GRAY8, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGB555, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGB565, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGB888, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA5551, Color::RGBA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::BGR888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::BGRA8888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::ETC1 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::RGB555 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::RGB565 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::RGB888 > (Bytes src, std::span< uint8_t > dst, Size size)
template<>
Result< void >	Haio::Codecs::Move< Color::RGBA8888, Color::RGBA5551 > (Bytes src, std::span< uint8_t > dst, Size size)

Detailed Description

the hot loops, writing pixels into a buffer the caller already owns. this is where the simd lives.

Function Documentation

Move< Color::BGR888, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::BGR888, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

the same three bytes the other way round, and an alpha nobody stored

Definition at line 1 of file rgba8888.cpp.

Move< Color::BGRA8888, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::BGRA8888, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

red and blue trade places and the alpha stays where it was

Definition at line 1 of file rgba8888.cpp.

Move< Color::ETC1, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::ETC1, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

Definition at line 30 of file rgba8888.cpp.

Move< Color::GRAY8, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::GRAY8, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

one sample becomes three, opaque. grey is grey in every channel

Definition at line 1 of file rgba8888.cpp.

Move< Color::RGB555, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGB555, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

the spare top bit is dropped rather than read: in this colour it means nothing

Definition at line 6 of file rgba8888.cpp.

Move< Color::RGB565, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGB565, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

Definition at line 7 of file rgba8888.cpp.

Move< Color::RGB888, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGB888, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

add an opaque alpha channel.

Todo

the mirror of the rgba8888 to rgb888 pack, and just as hot, but left scalar: the 3 to 4 unpack needs a load that straddles the shuffle window, so it is a real port rather than the same mask backwards.

Definition at line 1 of file rgba8888.cpp.

Move< Color::RGBA5551, Color::RGBA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA5551, Color::RGBA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

the bottom bit is the whole alpha: a pixel is either there or it is not

Definition at line 5 of file rgba8888.cpp.

Move< Color::RGBA8888, Color::BGR888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::BGR888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

blue first and the alpha dropped, which is a tga or a bmp scanline

Definition at line 1 of file bgr888.cpp.

Move< Color::RGBA8888, Color::BGRA8888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::BGRA8888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

the same swap as the way back, written out again rather than shared.

it is its own file because the pair is what the build scans for: a move that appeared in the other direction's file would be declared whenever that one was compiled, which is not the same thing as this one existing.

Definition at line 1 of file bgra8888.cpp.

Move< Color::RGBA8888, Color::ETC1 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::ETC1 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

lossy: four by four blocks, and the dimensions round up to whole blocks

Definition at line 30 of file etc1.cpp.

Move< Color::RGBA8888, Color::RGB555 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::RGB555 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

five bits a channel, rounded rather than truncated, and the alpha is dropped: this colour has nowhere to put it and saying so here is better than leaving a caller to wonder why a transparent picture came back solid.

Definition at line 1 of file rgb555.cpp.

Move< Color::RGBA8888, Color::RGB565 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::RGB565 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

five bits of red, six of green, five of blue, rounded rather than truncated

Definition at line 1 of file rgb565.cpp.

Move< Color::RGBA8888, Color::RGB888 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::RGB888 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

drop the alpha channel

Definition at line 76 of file rgb888.cpp.

Move< Color::RGBA8888, Color::RGBA5551 >()

template<>

Result< void > Haio::Codecs::Move< Color::RGBA8888, Color::RGBA5551 >	(	Bytes	src,
		std::span< uint8_t >	dst,
		Size	size )

five bits a channel and one of alpha.

the alpha rounds like everything else does, at half: a pixel that is more there than not stays, and the rest goes. there is no third answer to give, which is the whole reason a one bit alpha is worth asking for rather than something to apologise for – a sprite sheet for hardware that only ever tested one bit wants exactly this.

Definition at line 1 of file rgba5551.cpp.