The current GLUT initialization logic is flawed because it allows the
QB64 code portion of the program to start on a separate thread at the
same time that the GLUT code is starting. This results in a race where
some commands won't work for a brief period at the beginning of the
program (with "won't work" being very inconsistent, some return invalid
values, some have a chance at seg faulting).
The same issue also leads to us adding many `while (!window_exists)`
checks in an attempt to solve this race for some of the commands.
Unfortunately this solution is very inconsistently applied leading to
some deadlock situations, and really it's a silly solution when this
race is entirely our creation anyway.
To fix this, the logic was changed such that we perform all of the GLUT
initialization besides calling `glutMainLoop()` before we ever start the
thread that runs the actual QB64 code. By doing it this way we ensure
that the GLUT initialization has already taken place before the code
runs and thus the race is gone.
Things get a bit more interesting with $SCREENHIDE, because that simply
delays the execution of the GLUT initialization indefinitely until
_ScreenShow is done. This was previously very buggy since some commands
rely on FreeGLUT being up and will simply hang the entire program if
run. Other commands have logic to catch this and simply return zero.
The above issue is solved with the `NEEDS_GLUT()` and `OPTIONAL_GLUT()`
macros. Both of them simply check if the GLUT initialization has taken
place and exit the current function if it has not. The difference
between the two is that `NEEDS_GLUT()` throws an 'illegal function call'
error while `OPTIONAL_GLUT()` simply exits with no error. The choice of
behavior of each function was based upon its previous behavior - if it
checked `screen_hide` and exited with no error previously, then
`OPTIONAL_GLUT()` was used. If it deadlocked or similar then
`NEEDS_GLUT()` was used (so instead of deadlocking, it now produces an
error). In this way, programs can now never get stuck due to the use of
`$SCREENHIDE` and all the commands have consistent behavior that can be
relied upon.
Fixes: #234
Fonts 9, 15, and 17 can *only* be used in SCREEN 0. Attempting to use them in graphic screens results in a seg fault and an instant program crash on Windows. This is definitely the most undesirable of behaviors for a program, and can easily be caught and dealt with just by tossing a simple "Illegal Function Call" error for the issue.
Registering a warning function keeps FreeGLUT from writing warnings to
the console (which is not desirable since it conflicts with our own
console output).
Modifies libqb.cpp to add support for opening HTTP connections via
_OPENCLIENT(). This makes use of the libqb_http API in ./libqb, which is
backed by libcurl.
This also includes a bit of refactoring for some of the code that
required additions. I replaced a few of the integer values with enums,
and added a new entry for Http and then implemented it in all the
necessary locations. In addition to `_OPENCLIENT()`, there is also
support for using HTTP connections with `EOF()`, `LOF()`, `GET #`
(variable and fixed length), and `CLOSE`.
I additionally fixed an issue of parsing the colon parts of the
`_OPENCLIENT()` parameter, where having too many colons would cause the
program to crash. Since we only allow so many parts to begin with it I
simply limited the max number of parts it will split to 10.
Fixes: #98
Fixes: #46
This adds the libqb_http API, which is designed to support HTTP and
HTTPS usage from QB64-PE source.
The design consists of a single thread which services all the HTTP(s)
connections. There are then various libqb_http APIs exposed that allow
interacting with this thread to create a new connection, query
connection status, read data, or close the connection.
Internally the thread makes use of the curl_multi interface to allow a
single thread to service multiple HTTP(s) connections in parallel. This
means you can _OPENCLIENT() multiple HTTP connection in a row and all of
them will be serviced at the same time in whatever order data is
available.
HTTP is optional and selected via a Makefile setting. A stub is swapped
in if HTTP support is not used, which avoids need to add another build
flag to libqb.cpp.
I accidentally declared these as uint32_t even though I store -1 in
them. It was working anyway due to the implicit conversion that happens
when adding it to an int32_t, but it should be fixed regardless.
The border color parameter to PAINT is optional, but sub_paint was not
handling that case. What it should do in that situation is keep painting
until it finds pixels that are not the same color as the original
starting pixel was. Instead it would simply assume border color was
valid and paint until it finds color zero (the default parameter value
when it's not provided).
This was originally reported in QB64Official/qb64#2, and Walt
(@TheJoyfulProgrammer) fixed it in QB64Official/qb64#38. Functionally
this is the same change, however I'm checking `passed & 4` to see
whether a border color was provided rather than `bordercol == NULL`.
The later has problems if the provided bordercolor is zero, which is
allowed since zero is a valid color. The `passed` argument indicates
which of the function arguments were actually provided in the QB64
source that called PAINT.
Additionally, along with the `while (true)` loop that Walt changed I
went ahead and removed the duplication of the sections for each
direction. We now just use a couple of arrays to determine which
direction we're checking and loop over all 4.
`sub__mousemove` is trying to use `x_scale`, `y_scale`, `x_offset`, and
`y_offset` to calculate where the mouse should be in the event the
window coordinates are different from the screen coordinates.
Unfortunately, all four of those variables are actually never set in the
program. The real scale values and offsets (in the event of
letterboxing) are stored in `environment_2d__` values. This change
switches `sub__mousemove` to simply use the correct values when
calculating the mouse position.
Because `x_scale` and `y_scale` are not used anywhere else I just
removed them completely. I wanted to remove `x_offset` and `y_offset` as
well but there are a few spots that make use of it. It must be a bug,
since they are never assigned values other than zero, but I'm not sure
if the correct fix for the other locations is to use the
`environment_2d__` value or do nothing, so I'm leaving them for now and
we can address them later.
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.
- 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
Having windows call GetSystemMetrics without relying on glutGet, gets rid of the seg fault that can occur at program start up. screenicon was restored to it's previous state so that larger issues with it can be addressed at a future date.
Fixes the issue as brought up on the forums here: https://qb64phoenix.com/forum/showthread.php?tid=408
Also added a small set of logic so we don't end up inside an endless loop if the screen is hidden (via _SCREENHIDE), or if it doesn't exist for whatever reason.
Currently there is a bug where if a variable width font is in use and
text printed would exactly fit to the end of the row, it is instead
wrapped and printed on the next line.
Ex. You're printing a character that is 10 pixels wide, starting
from position 90 on an image that is 100 pixels wide. This should fix,
but instead your character will be printed on the next line.
The reason this happens is an off by one error, cursor_x (effectively
the X value passed to LOCATE) is one based even when using a variable
width font where cursor_x represents a pixel location. The location that
check if the next character can fit on the screen never handles the base
one, so it ends up treating the ending Y coordinate as one past where it
will actually end, which makes the code thing the print will go past the
edge of the screen.
To fix we simply subtract one before doing the comparison to give us the
actual ending pixel column.
In order to allow $DEBUG to work with programs that call CLEAR, the connection handle used to connect to the IDE is locked by default and cannot be CLOSEd. With this change, the debuggee itself can now unlock the handle and close the link.
This change adds the Program Files and Program Files (x86) folder specifications to the `_DIR$()` function.
`Print _Dir$("program files")
Print _Dir$("program files x86")`
Where the previous bug would only return the console's image size when an image was passed, the new bug made it only ever return 80 for `_Width` and 25 for `_Height` when it should be returning the console's image size if there is no value passed and it is the `_Source`, which it is if we are in a `$Console:Only`.
Here is a code block that demonstrates the bug being fixed:
```Option _Explicit
$Console
Screen _NewImage(640, 480, 32)
_Dest _Console
Width 120, 5
_Dest 0
Print "Hello world"
Print _DesktopWidth, _DesktopHeight
Dim As Long i: i = _NewImage(1280, 720, 32)
Print _Width, _Height
Print _Width(0), _Height(0)
Print _Width(_Console), _Height(_Console)```
When opening a file for random access, if the LEN is not supplied, it defaults the length correctly, but does not allocate the buffer correctly. The code should reference the record_length in the file struct.
2 changes here:
line 13062: When opening a file for random access, if the LEN is not supplied, it defaults the length correctly, but does not allocate the buffer correctly. The code should reference the record_length in the file struct.
Changes in lines 15798-15853: When printing text to the screen, carriage returns in the text are ignored. In sub_file_print, the code for printing to the screen is modified to honor carriage returns.
Fixes a bug that would make QB64 return the incorrect size monitor/desktop size when the resolution is scaled. Also, the last fix I added that set `_Source` to `_Console` automatically caused an issue with `_Width` and `_Height`, causing them to return only the console's image dimensions rather than the image that is passed.
Done for the sake of retrocompatibility. Although those symbols are simply ignored, as the type is determined by the variable types given at the respective READ statements.
Before we strip off the requirements (like "monospace" and such), we should first see if the font exists on the drive, since we call the routine recursively looking for it.