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'''Photochrome''' is an image format that uses palette switching and alternating two screens to display .../* 0 = single screen mode, bit 0 = xor screen data, bit 1 = xor palette data */

...each pixel was colored from an entry in a 256-color palette. Each of these palette entries was an 18-bit RGB color, 6 bits for each component. These capabilit

...ls. It can also use a local palette if no interesting match is found. This palette is continuously updated to re-use recent colors. This compression mode is n

Frame header | Palette | Video | Audio bytes 20-21 Palette size in bytes

...wn: one stores palette in frame, another one also could do this but stores palette in extradata instead. Compression principle is simple: divide frame into se == Palette change frames ==

...[199 * 3 * 16]; /* 199 scanlines, 3 palettes per scanline, 16 entries per palette */ Each palette is compressed separately.

====Palette==== ...ing a parser for this format, it is probably more efficient to reorder the palette while reading it, rather than swapping bits for each pixel.

* 0x3E - palette chunk (always first chunk in file) Payload format: u8 firstcolor -- first color of palette to update (always 64)

1 - uncompressed palette image 9 - RLE-encoded palette image

==Hardware Palette== The [http://en.wikipedia.org/wiki/Atari_ST Atari ST] has 16 16-bits hardware palette registers. All 16 colors are always stored, even if the resolution does not

...in 6144-byte frames without any header. Each frame may contain sound data, palette data and up to 3 video frames data. bytes 2- 3 - palette data offset (0 = no palette)

bit 1 palette change ...the first 768 bytes of the uncompressed data represent 256 red-green-blue palette triplets. Each component is one byte and ranges from 0..255.

...asterfile is an image file format supporting images of depth 1, 4, 8 (with palette) , 24 and 32 bits in either raw format or compressed with (yet again) a cus == The Palette Data ==

s8 new_palette -- new palette flag RGB palette[256] -- new movie palette

...be stored inside of an [[AVI]] file. In this case, a 256-entry 32-bit RGB palette is stored in the AVI header per the usual method for doing so. ...ime container|Apple QuickTime]] file. In this case, a 256-entry 32-bit RGB palette is stored in the video atom's stsd atom per the usual method for doing so.

* frame offsets (from the palette end) * palette in RIFF Palette format

...n represent 8 pixels in a byte. There are also 2-, 4-, and commonly, 8-bit palette schemes. ...simplify storage, programs that are designed around the VGA usually store palette components with 6 bits each, and in red-green-blue order (as the digital to

...olphin]. Apparently, it is a tile-based vector quantizer with a hard-wired palette, suited for the Sega CD console hardware.

u8 palmode1 -- Initial palette mode. 'W' - all White, '0' (or any u8 palmode2 -- Final palette mode. Same as above, but fade-out

...chunk type can occur multiple times in file to convey changes to the color palette. 0x000C le_16 pal_start palette start index