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Detect
Concepts | |
| concept | Haio::Codecs::Detectable |
Detailed Description
every container and colour pair this build can recognise. these are exactly the specialisations that satisfy Detectable, so a codec dropped from the build leaves this page and the concept together, while its format keeps its name in the enum.
Function Documentation
◆ Detect< Format::DDS, Color::RGB565 >()
template<>
| bool Haio::Codecs::Detect< Format::DDS, Color::RGB565 > | ( | Bytes | data | ) |
Definition at line 40 of file detect.cpp.
◆ Detect< Format::DDS, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::DDS, Color::RGBA8888 > | ( | Bytes | data | ) |
Definition at line 52 of file detect.cpp.
◆ Detect< Format::GIF, Color::RGB888 >()
template<>
| bool Haio::Codecs::Detect< Format::GIF, Color::RGB888 > | ( | Bytes | data | ) |
GIF has a palette rather than an RGB colour type, but the decoder expands it directly to RGB888.
Definition at line 45 of file detect.cpp.
◆ Detect< Format::GIF, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::GIF, Color::RGBA8888 > | ( | Bytes | data | ) |
Definition at line 31 of file detect.cpp.
◆ Detect< Format::JPEG, Color::YUV420 >()
template<>
| bool Haio::Codecs::Detect< Format::JPEG, Color::YUV420 > | ( | Bytes | data | ) |
start of image, then the first marker. every jpeg opens FF D8 FF whatever follows, be it a jfif header, an exif block or a bare quantisation table.
- Todo
- detect only: there is no jpeg decoder, so this answers "jpeg yuv420" and then Decode refuses. that refusal naming the format is the point, and it is what let describeForeignMagic go away.
Definition at line 22 of file detect.cpp.
◆ Detect< Format::KTX, Color::ETC1 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX, Color::ETC1 > | ( | Bytes | data | ) |
◆ Detect< Format::KTX, Color::RGB565 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX, Color::RGB565 > | ( | Bytes | data | ) |
◆ Detect< Format::KTX, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX, Color::RGBA8888 > | ( | Bytes | data | ) |
◆ Detect< Format::KTX2, Color::ETC1 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX2, Color::ETC1 > | ( | Bytes | data | ) |
◆ Detect< Format::KTX2, Color::RGB565 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX2, Color::RGB565 > | ( | Bytes | data | ) |
◆ Detect< Format::KTX2, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::KTX2, Color::RGBA8888 > | ( | Bytes | data | ) |
◆ Detect< Format::PNG, Color::GRAY8 >()
template<>
| bool Haio::Codecs::Detect< Format::PNG, Color::GRAY8 > | ( | Bytes | data | ) |
recognised on purpose with no decoder behind it: the error names the format.
- Todo
- palette (colour type 3) and gray+alpha (type 4) are not recognised at all, because neither has a Color to name it. before this refactor wuffs expanded both to rgba and they simply worked, so this is a regression until Color grows a PALETTE8 and a GRAY_ALPHA – and palette drags a colour table along with it.
Definition at line 61 of file detect.cpp.
◆ Detect< Format::PNG, Color::RGB888 >()
template<>
| bool Haio::Codecs::Detect< Format::PNG, Color::RGB888 > | ( | Bytes | data | ) |
Definition at line 43 of file detect.cpp.
◆ Detect< Format::PNG, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::PNG, Color::RGBA8888 > | ( | Bytes | data | ) |
Definition at line 33 of file detect.cpp.
◆ Detect< Format::PPM, Color::GRAY8 >()
template<>
| bool Haio::Codecs::Detect< Format::PPM, Color::GRAY8 > | ( | Bytes | data | ) |
the rest of the family is one sample a pixel: P1 and P4 bitmaps, P2 and P5 graymaps. they answer as grey so the decoder that gets them is the right one.
Definition at line 39 of file detect.cpp.
◆ Detect< Format::PPM, Color::RGB888 >()
template<>
| bool Haio::Codecs::Detect< Format::PPM, Color::RGB888 > | ( | Bytes | data | ) |
P3 is ascii pixmap and P6 binary pixmap: three samples a pixel
Definition at line 25 of file detect.cpp.
◆ Detect< Format::PVR, Color::ETC1 >()
template<>
| bool Haio::Codecs::Detect< Format::PVR, Color::ETC1 > | ( | Bytes | data | ) |
◆ Detect< Format::PVR, Color::RGB565 >()
template<>
| bool Haio::Codecs::Detect< Format::PVR, Color::RGB565 > | ( | Bytes | data | ) |
◆ Detect< Format::PVR, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::PVR, Color::RGBA8888 > | ( | Bytes | data | ) |
◆ Detect< Format::ROM, Color::CHR_NES >()
template<>
| bool Haio::Codecs::Detect< Format::ROM, Color::CHR_NES > | ( | Bytes | data | ) |
the ines header, which every nes rom on the internet starts with
Definition at line 15 of file detect.cpp.
◆ Detect< Format::TGA, Color::BGR888 >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::BGR888 > | ( | Bytes | data | ) |
twenty four bits a pixel, blue first
Definition at line 44 of file detect.cpp.
◆ Detect< Format::TGA, Color::BGRA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::BGRA8888 > | ( | Bytes | data | ) |
thirty two bits a pixel, blue first, with the last byte an alpha
Definition at line 33 of file detect.cpp.
◆ Detect< Format::TGA, Color::GRAY8 >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::GRAY8 > | ( | Bytes | data | ) |
one byte a pixel and no colour at all
Definition at line 92 of file detect.cpp.
◆ Detect< Format::TGA, Color::PALETTE >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::PALETTE > | ( | Bytes | data | ) |
an index a pixel and the colours it points at, which is the format's own palette
Definition at line 81 of file detect.cpp.
◆ Detect< Format::TGA, Color::RGB555 >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::RGB555 > | ( | Bytes | data | ) |
the same sixteen bits with nobody claiming the top one
Definition at line 70 of file detect.cpp.
◆ Detect< Format::TGA, Color::RGBA5551 >()
template<>
| bool Haio::Codecs::Detect< Format::TGA, Color::RGBA5551 > | ( | Bytes | data | ) |
sixteen bits a pixel whose top bit the file says is an alpha. the bytes are the same as the pair below; the attribute bits in the descriptor are the difference, and they are a claim the writer made rather than anything visible in the pixels.
Definition at line 59 of file detect.cpp.
◆ Detect< Format::ZCIS, Color::RGBA8888 >()
template<>
| bool Haio::Codecs::Detect< Format::ZCIS, Color::RGBA8888 > | ( | Bytes | data | ) |
- Todo
- zcis has no decoder at all, so a .zcis round trip is impossible. it also cannot say which colour is inside without reading the member names.
Definition at line 18 of file detect.cpp.
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