for an unknown reason, application activation functions can be called way too early during app launch
`S_SetSoundPaused()` function tries to read values of `i_pauseinbackground` and `i_soundinbackground` console variables before their initialization leading to a null pointer dereference
https://forum.zdoom.org/viewtopic.php?t=78092
Both now omit the intermediate FString as the target buffer can be directly written to.
WideString was also moved to utf8.cpp/h to uncouple from zstring.
* removed the intermediate pixel buffer
* instead of calling the file API for each single byte, load it into a buffer and use direct memory access. Using a file API like this can be magnitudes slower, depending on the underlying data.
* don't store the header in the image source object, it is never used again after validatipn.
The main advantage here is that this allows to get rid of the gdtoa dependency, it is also preferable to have some code here that's being maintained.
Feature-wise both are mostly identical, stb also support MSFT integer size modifiers and hexadecimal floats.
src/common/scripting/backend/vmbuilder.cpp:869:88: error: cannot pass non-trivial object of type 'FString' to variadic method; expected type from format string was 'char *' [-Wnon-pod-varargs]
src/common/scripting/backend/vmbuilder.cpp:916:85: error: cannot pass non-trivial object of type 'FString' to variadic method; expected type from format string was 'char *' [-Wnon-pod-varargs]
* add QualifiedName to VMFunction and allocate these static names from the class data memory arena instead of using FStrings.
* null pointer type checks in the VM added to avoid crash on bad codegen.
If EOF is read on stdin (such as when it is /dev/null), stop calling
select() on it. Otherwise, the code goes into an infinite loop
attempting to read from stdin which is always ready but never has any
data and it never calls the timer callback to progress.
* make all legacy light modes except 'Doom' MAPINFO only. A CVAR still exists for testing but its value won't be saved to the config.
* user can only select between "performance', 'software' and 'vanilla'. 'performance' is the old 'Doom' mode which is still needed to speed things up on low end hardware.
* MAPINFO can not enforce any of the two software light modes, as low end users require the option to change this to the 'performance' setting. Selecting one will always revert to the user's light mode selection.
* take I_BuildMIDIMenuList out of it
* pass the command line state to disable music from the init call.
* don't declare internal 'nomusic' variable in the header.
