* support for SSI container format - this is an obscure format used by a few Duke Nukem mods - added to have this subsystem identical between both engines.
* removed some dead wrapper code
* made the Open methods local to their implementations, this was never called virtually.
* new texture format: ANM - this reads the first frame of a Build-ANM movie as a texture.
* some preparations for indexed (paletted) rendering.
* optimization of the patch texture checker - do not read in the entire file if checking the initial header is sufficient for rejecting it.
* removed refreshFreq variable and related code. This only got into the backend because of stupid interpolation code in some of the Build games which has long been removed.
* save FixedBitArrays as base64 in savegames.
* allow indirections in the string table - by prefixing the language string with '$$' the remaining text is interpreted as another string label to resolve.
* constexpr in palette code, also replacing #defines with enums.
Backported from Raze - without this there is no way to implement sounds that can unload themselves, because the existing ChannelEnded function is called when the sound is still active.
If the loader is allowed to go on, these objects will be linked into game structures and may do unpredictable things before the loader has a chance to abort at the end.
Replaced explicit save of configuration file, which doesn't work after recent backend refactoring, with passing of CVARs we need to store to a new GZDoom process
https://forum.zdoom.org/viewtopic.php?t=69790
src\common\audio\sound\s_sound.cpp(556,27): warning C4244: '=': conversion from 'double' to 'float', possible loss of data
src\scripting\vmthunks.cpp(2678,13): warning C4244: 'return': conversion from 'time_t' to 'int', possible loss of data
* Added ViewAngle/Pitch/Roll properties to actors.
- These are offsets for camera angles that allow turning the camera without affecting aim or movement direction.
- Added A_SetView<Angle/Pitch/Roll>, which will set the view direction.
- Added ABSVIEWANGLES flag, used to make the view absolute instead of an offset.
* Converted functions to be direct-native.
Bogus pointers and offsets were serialized silently
This will to find other cases of dangling pointers, and protect from loading of broken saved games
https://forum.zdoom.org/viewtopic.php?t=67494
src/common/engine/stats.h:139:31: error: invalid output constraint '=A' in asm
src/common/platform/posix/osx/iwadpicker_cocoa.mm:379:1: warning: non-void function does not return a value [-Wreturn-type]
- Sets the direct pitch of the sound to the specific float. Default is 0.0, meaning do not set a specific pitch. Regular pitch is 1.0.
- Only works for direct sound definitions.
- Overrides $PitchShift unless value is <= 0.0
- Overridden by A_StartSound's pitch parameter if the value > 0.0.
