DPI Awareness allows a program to tell Windows that it will handle
properly scaling itself for the screen's DPI. Thus when a program is DPI
Aware, it will always see the actual screen size. When a program is not
DPI Aware, then Windows will scale the program according to the
selection by the user, and the reported screen size will match the
scaled size rather than the actual screen size.
Commit 189cdb8e added logic to enable DPI Awareness on Windows, but it
was hidden behind a `WINVER` check. This meant it was not actually in
use because at the time QB64 did not set a `WINVER` high enough to
actually enable that code. As such all Windows versions of QB64
including v2.0.2 were not DPI Aware.
Much later-on, Commit 869e361e declared a `_WIN32_WINNT` of `0x0600`,
which seems to have also declared `WINVER` as the same and thus enabled
the DPI Awareness logic. As a consequence, QB64-PE programs no longer
get scaled even though they don't have a way to acquire the current DPI
to do proper scaling themselves.
Since the behavior change was unintentional and proper language support
is not there, we're considering the addition of DPI Awareness a bug. It
will be added back some time later with more language support to allow
it to be properly used.
We started defining `_WIN32_WINNT` a little while ago to express that we
require Windows Vista or above for support. This enables us to access
some Windows Vista-only APIs. The fact that `WINVER` also needs to be
defined was missed, and it seems that defining one means the other no
longer gets defined automatically as it did before. Thus we're simplying
now also defining `WINVER` the same as `_WIN32_WINNT`.
This fixes High-DPI awareness and a few other things that were gated
behind WINVER checks.
- checks all remaining occurrences of the term 'qb64', some remain untouched, some are renamed according to context
- also added new logo for README.md
- this step does finalize the 'Phoenix Edition' re-branding
- replaced default icon image data, which is used, if _ICON is used w/o parameter, but no $EXEICON is specified either (see also Step 1)
- this step completes icon related changes
- int/src/icon.ico (replaced image but same name, dynamically created from given $EXEICON)
- int/src/icon.rc (updated but same name, dynamically created from given $VERSIONINFO)
- int/src/qb64.ico and src/icon.rc removed (not used anymore since dynamic creation was implemented)
- src/qb64.bas updated (rename comes in a later step)
- src/qb64.ico replaced and renamed
We shouldn't allow mutex lock/unlock to silently do nothing if NULL is
passed, as that is very likely a bug. Beyond that the Windows version
doesn't do this, so it's inconsistent as well.
This moves a lot of the preprocessor flags for what compiler/platform
we're using into a libqb-common.h header inside the libqb/include
folder. This gets included at the top of every libqb .cpp file, and is
intended to be fairly small, providing only necessary things like
_WIN32_WINNT (which needs to be defined before including <windows.h> or
friends).
The Buffer API implements an append-only buffer, where you can write to
the end or read from the beginning. Data that is read is discarded from
the buffer, and you can query the buffer to get the current amount of
data inside.
Internally the buffer API is implemented as a chain of separate buffers.
This is done to avoid having to resize the existing buffer, which is
expensive. We keep track of where the reading currently is, and discard
the internal buffers after all the data in them is read.
Completions are basically a oneshot flag, which provide a `wait()` call
that blocks until 'finish()' has been called on the completion.
The nice aspect of completions is that because it is a oneshot the order
does not matter - if 'finish()' is called before 'wait()' then 'wait()'
returns immediately. It makes the logic for waiting until a thread is
done finishing up some work easy to implement.
This adds generic APIs to libqb for handling thread's, mutex's, and
condition variables. On Linux and OSX these are implemented via the ones
provided by pthreads. On Windows they're implemented via the ones
provided by the Win32 API.
For compiling, the code itself is not conditional, but the Makefile
includes logic to decide which implementation to pick.
Note that it would have been nice to simply use std::thread and friends
from C++11, however using them on MinGW appears to be a bit messy. Since
using the Windows ones directly isn't that hard this was an easy compromise.
This sets up a few different flags we'll need for the conditional
compiling, and also sets the C++ standard to gnu++11, which effectively
just matches what we were implicitly using before.