The original code was using double precision floating point to perform the
color corrections for the creation of the standard colormap. This precision
is not necessary because color coding is 16 bits anyway, and on some
architecture the double precision comes with a cost.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Since C99 we have floating point functions available for single precision,
so as it is what we need we detect them (configure) and use them when
appropriate. The goal is to avoid unnecessary float->double + double->float
conversion.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
This patch brings more consistency in the presentation of comments,
including:
- 2 line spaces between blocks (M4 macro tend to make the file look quite
bulky, so it is making the file more aerated)
- fixes in the length of underlining
- adding a few comments on the reason of the check to ease maintainance
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
For code maintainability, it is better to have a single definition of the
constant than many ones dispatched in many places. In addition, we try to
count on the constant M_PI that can be defined by the header <math.h> if
possible because it may have the best accuracy for the platform.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Compilation will not work if the header is missing, so make sure
it is present and compilable first. This can highligh sooner if
a user forgot to install the corresponding dev package.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
Took the opportunity to rewrite the check using autoconf macros
to generate a more compatible configure script.
Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
