Byte offset between the start of two consecutive scanlines.
This value is permitted to be negative, denoting a bitmap
whose content is flipped at the x axis.
Byte offset between the start of two consecutive planes.
This value is permitted to be negative. If this value is zero,
the bitmap is assumed to be in chunky format, otherwise it is
assumed to be planar. The difference between chunky and
planar layout lies in the way how color channels are
interleaved. For a chunky format, all channel data for a
single pixel lies consecutively in memory. For a planar
layout, the first channel of all pixel is stored consecutive,
followed by the second channel, and so forth.
Byte offset between the start of two consecutive scanlines.
This value is permitted to be negative, denoting a bitmap
whose content is flipped at the x axis.
Byte offset between the start of two consecutive planes.
This value is permitted to be negative. If this value is zero,
the bitmap is assumed to be in chunky format, otherwise it is
assumed to be planar. The difference between chunky and
planar layout lies in the way how color channels are
interleaved. For a chunky format, all channel data for a
single pixel lies consecutively in memory. For a planar
layout, the first channel of all pixel is stored consecutive,
followed by the second channel, and so forth.
Color space the bitmap colors shall be interpreted within.
Note that the actual pixel layout is specified at the color
space. If this layout describes a palette bitmap format, this
color space describes the index format (plus maybe an extra
alpha channel). The palette itself references another color
space, which describes the layout of the palette entries.
This member determines whether the bitmap data are actually
indices into a color map.
When set to the nil reference, the bitmap data is assumed to
contain direct color values (to be interpreted according to
the associated color space). If this member references a valid
palette, one of the pixel components as returned by the color
space referenced from the ColorSpace is
required to be of type
ColorComponentTag::INDEX. That component is
then used to index the palette.
This member determines the bit order (only relevant if a pixel
uses less than 8 bits, of course).
When true, this member denotes that the leftmost pixel from
an 8 bit amount of pixel data consists of the bits starting
with the most significant bit. When false, it's starting
with the least significant bit.
Example: for a 1bpp bitmap, each pixel is represented by
exactly one bit. If this member is true, the first pixel is
the MSB of the first byte, and the eighth pixel is the LSB of
the first byte. If this member is false, it's just the
opposite.
