format conversion
What
is pixel format conversion? |
Pixel format conversion is performed when pixel
data in one format is converted to another format. An example of this is
converting an array of 16bit RGB565
pixels to an array of 32bit ARGB8888
pixels.
Pixel format conversion has traditionally been
used as an initialization step: textures, sprites and other pixel data
is loaded then converted on startup to the display pixel format. The use
of pixel format conversion in other areas of programs has been limited
because it was considered slow.
PTC takes pixel format conversion to the next
level. With PTC pixel format conversion is extremely fast, so fast that
you can work independantly of the display format in a virtual
display mode.
Supported
pixel format conversions |
PTC has a set of ultra fast pixel format conversion
routines based on three source formats: INDEX8, RGB565 and ARGB8888. From
each of these source formats PTC can convert to any of the following formats:
ARGB8888, ABGR8888, ABGR8888, BGRA8888, RGBA8888, RGB888, BGR888,
RGB565, BGR565, ARGB1555,
ABGR1555, RGB332,
GREY8, and 9 VGA
truecolor emulation modes.
PTC also has a set of more generic conversion
routines to handle conversions not listed above.
The best thing about PTC's pixel format conversion
routines is that they are totally transparent. If you BitBlt between two
surfaces of a different pixel format the conversion is performed automatically,
the same happens when you update to the display. PTC is that easy to use.