This commit extends the optional currently existing low level font
baking API with another more high level font atlas API.
The font atlas takes away some fine grained memory control from the
user but is easier to use and to understand than the lower level API.
I added combined with the font atlas a optional default font which
allows running the library without a user provided truetype font.
While user friendly it is quite big (~12kb) so I added a compiler flag
to remove it from the library while compiling if not wanted.
Finally I added some additional compiler flags to allow easier to use
APIs. The downside is that all of them require the standard library,
so if you don't want to add the standard C library I would recommend
deactivating all flags marked as standard library flags.
Previous visual changes in the library were quite limited with some
colors and some global properties. This commit changes all that and
provides way more control over every widgets visual appearance.
Changes include extended color selection, per widget properties and
the possibility to use skinning.
While the new API allows for a lot more control it is currently quite
low level and needs a lot more testing and probably another higher
level style API to make changes in code easier. I also had to remove
the style modification code inside the demo and will probably first
try to write another higher level API before adding it back in.
This commit also include some breaking changes to existing code like
the missing style stack API and some widget names changes due to
added granularity granted by the rewritten style.
Defining compile flag ZR_COMPILE_WIDTH_VERTEX_BUFFER with 0 would
cause compiler errors. This is now fixed and every compile flag
combination should now work as intended.
The default draw command buffering API now supports filled and
outlined shapes as well as two additional commands: polygon and
polyline. While zahnrad only requires a small number of basic
filled draw command shapes to actual function the underlying canvas
to convert from draw commands to vertex buffer commands allows
for lot more. So the gap should now be filled and drawing more
complex custom is now a little bit easier. I thought about adding a
path drawing API to the draw command API but decided it is not
worth the hassle, at least for now.
I spend the last week(s) with lot of time thinking about this and I
came to the conclusion that recording it is not really worth doing.
In theory it could be interesting but the truth is I don't want to
do any more complex refactoring anymore and want to have a break
from extending this library. I spend over a year on this and I think
it is time for me to move on to other things. I will continue fixing
errors or adding requested essential smaller features but no
more complex rewrites or risky changes.
This is quite a big commit which adds an experimental text script to
UI bytecode compiler. The compiler is still under heavy development
and can and will be under heavy changes, so use with caution.
In addition I added the old file browser for unix like platforms
back into the demo. At the moment it only supports windows but
the only part of the file browser that is platform dependend
is the directory content loader which should be easy to implement
in other platforms as well.
An additional widget for picking a color was added. Color picker use
the new draw call command multicolor rectangle which is not supported
everywhere. All demos using the optional vertex buffer output can use
the color picker without problems. Other platforms need to support
a drawing function or do not it.
New windows who have been exposed now are directly activated and
the last activated window is now correctly deactivated. Previously
some cases in which no current window was active caused problem
like not working scrollbar.
Extended the demo window with a submenu which allows to activated or
deactivate windows. In this particular case the sequence in which the
control and demo window in contrast to all the other windows are
placed is important but only in this demo since querying is done by
the control window.
Toggling between hidden and shown window would previously cause
drawing bugs and in the worse case would destroy the drawing loop.
The bug is now fixed by stepping over each window which is hidden
inside the draw call loop.
Previously rapidly closing and exposing windows caused the library
to freeze. This had two reasons one was a bug in the list insert
and remove code the other was in the fact that if the currently
active window is removed no other window would active which resulted
in a blocking UI. Both problems are now fixed but there is a small
visual bug which is triggered if a window is toggled.
C89 does not support or rather allow void pointer to function
pointer conversion and back. While gcc notices and warns
about the issue clang will just stay silent and let it slide.
So note to self compile with gcc to check for C89 violations.
Extended the demo with two additional very helpful comboboxes.
The first one is a simple time picker and the other one is a
date picker with year, month, week day selection.
Two additional high level functions have been added using the chart
API for better ease of use. Both calculate the min and max value
while one works on an array and the other ones is based on a
callback.
While setting a window to active `zr_window_set_focus` did not
transfer the window on top of the window stack. This wrong
behavior should now be fixed and do what it is supposed to do.
Previously all menu titles were centered in X- and Y-axis without any
way to control the alignment. Since it was requested I added an
alignment flag to `zr_menu_text_begin`. To achieve the same outcome
like before this commit the flag has to be `ZR_TEXT_DEFAULT_CENTER`.
I forgot to change text drawing in the native allegro drawing API.
It should now be fixed and draw correctly. Furthmore I increased the
size of the demo window menu items to ensure that the checkbox text
is correctly drawn without clipping.
First version supporting the new record and play feature which allows
to `record` a number of API calls and lets you replay them at a later
point of time. This could be the basis for creating an Editor and
other more advanced features. While I tested the functionality there
still could be a number of bugs and I would recommend waiting
until all bugs are removed before using it.
Fixed one of the small issues between C and C++. The handling of
enums. While C uses weak types and compiling `zr_flags` or
`enum zr_text_alignment` did not cause any problems, trying to do the
same with C++ results in errors or in this case a linking
error since while the function exist with `zr_flags` it does not
exist with `enum zr_text_alignment` (another problem of function
overloading...)
The conversion function from rgb color to hsv color was bugged and
provided wrong values. It is now fixed and hopefully is now correct.
In addition a number of utility functions have been added to make
conversion between user provided color format and zahnrads own
format easier.
