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GLSL sampler variables indicate which texture unit to use for TEX instructions.
Previously, this was baked into the fragment/vertex program and couldn't be
readily changed once set.
Now, SamplerUnits[] array indicates which texture unit is to be used for
each sampler variable. These values are set with glUniform1i().
This is extra state that must be passed to the fragment/vertex program
executor at runtime.
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The _rgba versions are temporary until the state tracker is updated.
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Also, quite a bit of re-org of the tile caches and surface mapping/unmapping.
Leave surfaces mapped between primitives now.
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Unfortunately, the generated fragment shader code is effectively unusable until
it handles quad->mask.
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This reverts commit 6dcfddb8e2ec2bfb6187b912807fa65f28da2c5e.
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Build a buffer of contigous vertices and indices at the backend of our
software transformation/clipping path. This will become the mechanism
for emitting buffers of vertices to rasterization hardware.
This is similar to but not the same as the post-transform vertex cache.
In particular, these vertices are subject to clipping, culling, poly offset,
etc. The vertices emitted will all be used by hardware.
TODOs include the actual transformation to hardware vertex formats, moving
this out of softpipe to somewhere more useful and allowing >1 primitive to
share the generated VB.
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TGSI_ATTRIB_x tokens still present and used in a few places.
Expanded set of TGSI_SEMANTIC_x tokens for describing the meaning
of inputs/outputs. These tokens are in a crude state ATM.
Lots of #if 0 / disabled code to be removed yet, etc...
Softpipe and i915 drivers should be in working condition but not heavily tested.
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Create/Delete calls should be split since in create we'll be
compiling them so we want to know which one it is (vertex/fragment).
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state
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Converting depth and stencil objects into a single state object
(d3d10 like) and making it immutable.
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Switch the sample to be an immutable state object.
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We want our state objects to be immutable, handled via the
create/bind/delete calls instead of struct propagation.
Only implementing the blend state to see how it would look like
and work.
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This replaces the temporary occlusion counter functions we had before.
Added new ctx->Driver.WaitQuery() function which should block until the result is ready.
Sketch out some code for vertex transformation feedback counters.
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They're now totally independent of the actual shaders.
Also, implemented in terms of pipe_buffer_handles/objects.
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new st_draw_vertices() utility used by glClear and glDrawPixels
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We weren't mapping all the needed vertex array buffers.
Move array state that was temporarily in draw_context to softpipe_context.
Remove a bunch of dead code.
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To build with mesa, need -DMESA in makefile/config file.
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Mainly down to the support for legacy TNL processing now.
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Not sure if finish() is the right interface yet.
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The state_tracker driver needs these to implement, eg. pixel buffer objects,
vertex buffer objects.
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This interface is defined by softpipe and any window system (eg i915pipe)
wishing to use softpipe is required to implement the interface.
Currently the interface is all about buffer management.
Generalizing, each pipe driver will advertise an interface in a similar
spirit to this, and again any window system driver wishing to use that
rendering pipeline will have to implement the interface it defines. It
clearly isn't a one-way street however, as softpipe could just do its own
buffer management with malloc. The interaction with a buffer manager is
desired to allow us to exercise the hardware swapbuffers functionality of
the i915pipe driver, and also to get a feel for the way hardware drivers
which really need a buffer manager will work.
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for glClear.
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