This is an effort to be able to use the same GLSL code for both Vulkan
and OpenGL. This is done by first compiling the Vulkan GLSL code to
SPIR-V and then using a custom tool (which uses SPIRV-Cross) to convert
that back into GLSL 1.50 compatible code.
The required tool will be downloaded by CMake when glslc is found in the
path. This is included in the Vulkan SDK. To avoid having a hard
dependency on this, the generated files are included in the VCS and are
only regenerated when glslc is found on the system.
Persistent buffer mapping is an OpenGL technique where the contents of a
buffer object are mapped to a persistent pointer instead of having to
map and unmap a buffer every time it is modified.
This decreases the overhead for updating data in a uniform buffer object
which now only consists of a memcpy and a flush call.
This commit disables emissive lighting on objects by default (as the new HDR process makes it unnecessary) and switches the -no-emissive commandline parameter to -emissive; Setting that parameter will restore the old behaviour. The -no-emissive parameter is retained to avoid user-facing error messages.
In addition, this commit sets the default bloom value to 25.
This adds support for rendering models using thick lines (that means
lines wider than 1 pixel) which is required by the hardpoint HUD gauge.
This feature was present before the switch to OpenGL code and had to be
removed since the core profile does not support rendering lines wider
than 1 pixel.
This uses a geometry shader for converting all the triangles from a
model to 3 quads along the triangle lines which are as thick as set by
the model renderer. Geometry shaders are quite slow if they generate a
lot of geometry (and this generates 4 times the usual amount of geometry
in the shader) so it's probably not a very fast rendering operation but
it is only needed once per frame so it shouldn't be too bad.
I also added support for the RenderDoc API since I needed that for
debugging and it might be useful in the future. It will only become
active if RenderDoc is actually attached to the process so in most cases
the new code will do nothing.
This was missed when converting the model uniforms to a uniform buffer
and caused some issues with team colors. This sets that uniform to the
value it had before the uniform buffer changes.
This fixes#1683.
Specifying the fog rendering options is now handled by the materials
system and the implementation of gr_set_fog was pretty much empty so I
removed it.
This uses UBOs for building a buffer object of uniform data before
using that data to draw objects. This should reduce the CPU overhead by
reducing the amount of glUniform calls required for executing a single
draw call. This is especially useful if rendering is limited by the CPU
which should help performance for people with slower CPUs.
This fixes#910.
asarium