This mostly meant for special docker standalone server builds where it
might be useful to have full release performance but also have the logs
available if necessary. This now always compiles the log statements but
enables or disables them with a constexpr so they should not appear in
actual release binaries.
This is in preparation for using persistently mapped buffers for uniform
buffers. Since that functionality is not available in the OpenGL version
we are targetting I implemented a fall-back which simply uses
glBufferSubData.
I did a benchmark with these changes and there was no change in
performance to the current master version.
This was causing issues since the new bitmap data was never stored in
the internal buffer FSO uses for getting the image data. Instead, it was
only uploaded to the GPU texture which could be deleted at any time.
This was the case when changing the "3D Hardware Texture" setting which
causes a texture flush.
This fixes#1961.
The original issue was reported by Novachen in #1754 where a significant
slowdown was encountered in the controls menu (Ship and Misc tabs). I
traced the cause of the slowdown to repeated uploads of the NanoVG font
atlas texture even though no changes were necessary.
The root cause of the issue was that NanoVG did not handle invalid UTF-8
sequences at the end of a string properly. The UTF-8 decoder returned a
success code even though no code point was decoded which lead the rest
of the code to believe that the font atlas needed to be recreated.
This fixes#1754 by properly handling that case.
This also fixed an assertion failure if NanoVG was asked to render
2D elements without any vertices.
The previous version used NanoVG which caused quite a serious FPS drop.
This adds a buffer batching class which groups line drawing operations
together and submits them to the GPU with a single draw call.
One of the main points of contention when adding the NanoVG based
TrueType text rendering was that it required an external Opengl
renderer which may interfere with our rendering engine by changing
OpenGL state without telling the rest of the engine. Since the rendering
interface for NanoVG is abstract and can be easily replaced, I did just
that and replaced it with an implementation that uses only generic
graphics functions without relying on the specific graphics API.
This will improve the interoperability of NanoVG with our engine and
should make later changes to the rendering engine easier since there is
no external rendering code which may interfere with our own code.
asarium