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nWidthDest

nWidthDest is a variable name commonly encountered in programming projects that manipulate images or raster graphics. The 'n' prefix signals an integer type (a convention known as Hungarian notation), and 'WidthDest' conveys the meaning: the width of the destination, i.e., the target image or rendering buffer after an operation such as scaling, copying, or compositing.

In image processing, you typically work with source and destination dimensions: nWidthSrc, nHeightSrc for the input

In calculations, nWidthDest frequently participates in index computations. For a row-major buffer with a given bytes-per-pixel,

Common scenarios include image resizing, bitmap blitting, and rendering pipelines where a source image is scaled

Related terms include nWidthSrc, nHeightSrc, and destination width concepts in APIs that differentiate between source and

image,
and
nWidthDest,
nHeightDest
for
the
output.
The
destination
width
is
used
to
allocate
memory
and
to
compute
addresses
for
destination
pixels.
It
is
often
stored
alongside
related
values
such
as
the
destination
height,
the
destination
buffer
pointer,
and
stride
information.
the
offset
for
a
pixel
at
(x,
y)
can
be
calculated
as
(y
*
nWidthDest
+
x)
multiplied
by
bytesPerPixel.
It
is
commonly
paired
with
other
variables
like
nHeightDest,
pSrc,
pDest,
and
stride
values
to
navigate
source
and
destination
buffers
correctly.
to
a
different
size.
While
the
exact
usage
of
nWidthDest
can
vary
by
codebase,
it
consistently
denotes
the
width
of
the
destination
target
rather
than
the
source,
guiding
memory
allocation
and
coordinate
mapping.
destination
dimensions.
Understanding
the
role
of
nWidthDest
helps
ensure
correct
memory
management
and
accurate
mapping
of
source
coordinates
to
destination
coordinates.