This will make driver's life a bit harder, however it makes sense that stencil
reference value is not part of the pipe_depth_stencil_alpha_state, because
it often (there are some algorithms which require this) changes more frequently
than the rest of the dsa state. This is also encouraged by some graphic APIs.
Treat it similar to pipe_blend_color.
If the texture priority field is 0.125 set the PROG_PARAM_BIT_CYL_WRAP
flag. The gallium state tracker will look for this flag.
This feature is only for testing purposes and may be remove at some
point. But if it's useful we could write a GL/Mesa extension to
expose it properly.
This object can be shared with another context, so we cannot just
delete it when the owning context is being destroyed.
Ensuring that buffer objects are properly refcounted guarantees
NullBufferObj is destroyed when all references to it are removed.
Lets see if this is not too pedantic. Obj pointers are never exposed to
GL apps so it should be possible to get this right.
Furthermore apps with GL widgets and test suits create and destroy many
contexts and objects, so bad reference counting is not really an option.
Always use _mesa_reference_buffer_object, and never call
ctx->Driver.DeleteBuffer() directly to prevent dangling pointers to the
null buffer object.
This fixes crash/assertions in sharedtex_mt and Autodesk Mudbox.
with mutable vars we don't need to follow the phi nodes. meaning that
control flow becomes trivial as we don't have scan the rest of the tgsi
to figure out the variable usage anymore. futhermore the memory2register
pass promotes alloca/store/load to registers while inserting the right phi
nodes. so we get simplicity and performance.
After that commit, some dri2 protocol symbols were being checked from
places that weren't including dri2proto.h, effectively disabling some
valuable SwapBuffers codepaths.
the llvmpipe tgsi translation is a lot more complete than what was in
gallivm so replacing the latter with the former. this is needed since
the draw llvm paths will use the same code. effectively the proven
llvmpipe code becomes gallivm.
Roland Scheidegger