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This was never fully fleshed out and hasn't been used.
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Signed-off-by: Alan Coopersmith <alan.coopersmith@sun.com>
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Useful for debugging to override an application's shader.
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Otherwise two threads might think each made the refcount go zero.
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Windows threads block if one over-unlocks them.
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Namelly, FlushMappedBufferRange takes a subrange relative to the original
range.
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When a hw driver fell back to swrast, swrast wasn't always getting informed
of program changes. When fixed function is translated into shaders, flags
like _NEW_LIGHT, _NEW_TEXTURE, etc. should really signal _NEW_PROGRAM.
In this case, swrast wasn't seeing _NEW_PROGRAM when new fragment shaders
were generated.
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Conflicts:
scons/gallium.py
src/gallium/auxiliary/pipebuffer/pb_buffer_fenced.c
src/gallium/include/pipe/p_defines.h
src/mesa/vbo/vbo_exec_api.c
src/mesa/vbo/vbo_exec_draw.c
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Will be needed in coming GL extensions (GL_map_buffer_range, GL 3.0).
Will be used by the vbo module to avoid reallocating vbo's at each
draw primitive call.
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Provides notification to the VBO modules prior to the first immediate call.
Pairs with FlushVertices()
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Another conditional can be avoided.
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Need to clear the _ReallyEnabled field before possibly continuing the loop.
Also, set _Current pointer to NULL if the unit is no longer enabled.
Fixes piglit lodbias regression
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Fixes piglit copytexsubimage regression.
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For regular GL, we must have vertex positions in order to draw. But ES2
doesn't have that requirement (positions can be computed from any array
of data).
See bug 19911.
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With FBOs one could enable stencil before a stencil buffer is later bound.
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Only true if stenciling is enabled, and there's a stencil buffer.
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This field should not include vertex textures. It indicates the coord
inputs for fragment / fixed-function processing.
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We can avoid a few iterations this way.
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Remove all references to aux buffers 1..3. Keep AUX0 around for now just
in case, but it'll probably go too someday. I don't know of any OpenGL
drivers since the IRIX days that support aux color buffers.
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s/FRAG_RESULT_DEPR/FRAG_RESULT_DEPTH/
s/FRAG_RESULT_COLR/FRAG_RESULT/COLOR/
Remove FRAG_RESULT_COLH (NV half-precision) output since we never used it.
Next, we might merge the COLOR and DATA outputs (COLOR0, COLOR1, etc).
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This makes debugging with gdb a bit easier.
Ex:
(gdb) p ctx->DrawBuffer.Attachment[BUFFER_STENCIL]
Note however that gdb only seems to recognize enum types that are actually
used to declare a variable somewhere. For example, gl_buffer_index isn't
used to declare any vars so it's invisible to gdb. Work around this by
adding a dummy function in context.c that declares some vars with these
new types.
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We can't use the "fstoi" instruction like this.
Unlike other floating point instructions, "fstoi" always rounds
towards zero no matter what rounding mode the FPU has been set to.
This was validated using the following test program:
--------------------
static inline int iround(float f)
{
int r;
__asm__ ("fstoi %1, %0" : "=f" (r) : "f" (f));
return r;
}
#define IROUND(x) iround(x)
#define IROUND_REF(f) ((int) (((f) >= 0.0F) ? ((f) + 0.5F) : ((f) - 0.5F)))
int main(void)
{
float f = -2.0;
while (f < 3.0f) {
int sparc_val = IROUND(f);
int ref_val = IROUND_REF(f);
if (sparc_val != ref_val)
printf("DIFFERENT[%f]: REF==%d SPARC==%d\n",
f, ref_val, sparc_val);
f += 0.1f;
}
return 0;
}
--------------------
which prints out things like:
--------------------
DIFFERENT[-1.900000]: REF==-2 SPARC==-1
DIFFERENT[-1.800000]: REF==-2 SPARC==-1
DIFFERENT[-1.700000]: REF==-2 SPARC==-1
DIFFERENT[-1.600000]: REF==-2 SPARC==-1
DIFFERENT[-1.000000]: REF==-1 SPARC==0
DIFFERENT[-0.900000]: REF==-1 SPARC==0
DIFFERENT[-0.800000]: REF==-1 SPARC==0
DIFFERENT[-0.700000]: REF==-1 SPARC==0
DIFFERENT[-0.600000]: REF==-1 SPARC==0
DIFFERENT[0.500000]: REF==1 SPARC==0
DIFFERENT[0.600000]: REF==1 SPARC==0
...
--------------------
So we have to remove Sparc's IROUND() definition, it's wrong.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fixed point is only used in swrast and sw-based drivers.
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Also, ctx->Driver.UnmapBuffer can never be null, so remove conditional.
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If glBufferDataARB() is called while a buffer object is currently mapped
we're supposed to unmap the current buffer, then replace it. Don't generate
an error.
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Only call this driver function when we really need to bind different buffers.
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This rewrites the sparc GLAPI code so that it's PIC friendly and works
with all of the TLS/PTHREADS/64-bit/32-bit combinations properly.
As a result we can turn SPARC asm back on. Currently it's only
enabled on Linux, as that's the only place where I can test this
stuff out.
For the moment the cliptest SPARC asm routines are disabled as they
are non-working. The problem is that they use register %g7 as a
temporary which is where the threading libraries store the thread
pointer on SPARC. I will fix that code up in a future change as it's
a pretty important routine to optimize.
Like x86 we do the runtime patch as a pthread once-invoked initializer
in init_glapi_relocs().
Unlike x86, however, our GLAPI stubs on SPARC are just two instruction
sequences that branch to a trampoline and put the GLAPI offset into a
register. The trampoline is what we run-time patch. The stubs thus
all look like:
glFoo:
ba __glapi_sparc_foo_stub
sethi GLAPI_OFFSET(glFOO) * PTR_SIZE, %g3
This actually makes generate_entrypoint() a lot simpler on SPARC. For
this case in generate_entrypoint() we generate stubs using a 'call'
instead of the 'ba' above to make sure it can reach.
In order to get a proper tail call going here, in the unpatched case,
we do several tricks. To get the current PC, for example, we save the
return address register into a temporary, do a call, save the return
address register written by the call to another temporary, then
restore the original return address register value. This is to
avoid having to allocate a stack frame.
This is necessary for PIC address formation.
This new GLAPI scheme lets us get rid of the ugly SPARC GLAPI hacks in
__glXInitialize() and one_time_init().
Signed-off-by: David S. Miller <davem@davemloft.net>
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