i965: Add GPU BLIT of texture image to PBO in Intel driver

Add Intel driver hook for glGetTexImage to accelerate the case of reading
texture image into a PBO.  This case gets huge performance gains by using
GPU BLIT directly to PBO rather than GPU BLIT to temporary texture followed
by memcpy.

No regressions on Piglit tests  with Intel driver.
Performance gain (1280 x 800 FBO, Ivybridge):
glGetTexImage + glMapBufferRange  with patch 1.45 msec
glGetTexImage + glMapBufferRange without patch 4.68 msec

v3: (by Kenneth Graunke)
 - Fix compile after Eric's change to drop the tiling argument
   to intel_miptree_create_for_bo.
 - Add GL_TEXTURE_3D to blacklisted texture targets to prevent Piglit
   regressions.
 - Squash in several whitespace and coding style fixes.
tgsi/gs: bound max output vertices in shader

This limits the number of emitted vertices to the shaders max output
vertices, and avoids us writing things into memory that isn't big
enough for it.

Reviewed-by: Zack Rusin <zackr@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: add depth clamping support. (v2)

This passes the piglit depth clamp tests.

this is required for GL 3.2.

v2: move min/max up one level, could go further, thanks
to Roland for suggestion.

v1: Reviewed-by: Brian Paul <brianp@vmware.com>

Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: add layering to the surface tile cache.

This adds the layer info to the tile cache.

This changes clear_flags to be dynamically allocated as
MAX_LAYERS seems like a too big step.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: add layered rendering support.

This adds support for GL 3.2 layered rendering to softpipe.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
tgsi_exec: use defines for max inputs/outputs

This fixes the limits for GL 3.2, and subsequently fixes
some segfaults in some varying packing tests and max varying tests
after the limits bumped.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: bump the softpipe geometry limits

This just aligns the limits with llvmpipe.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: enable GLSL 3.30 support.

This enables GL3.3 on softpipe.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: enable AMD_vertex_shader_layer.

This passes tests now on softpipe.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
softpipe: fix pt->resource assert placement

oops meant to move this.

Signed-off-by: Dave Airlie <airlied@redhat.com>
glsl: Store gl_uniform_driver_storage::format as the actual type

And delete the incorrect comment.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
i965/vec4: Silence a couple unused parameter warnings

brw_vec4_visitor.cpp:2717:1: warning: unused parameter 'ir' [-Wunused-parameter]
brw_vec4_visitor.cpp:2723:1: warning: unused parameter 'ir' [-Wunused-parameter]

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
i965/vec4: Emit smarter code for b2f of a comparison

Previously we would emit the comparison, emit an AND to mask off extra
bits from the comparison result, then convert the result to float.  Now,
do the comparison, then use a cleverly constructed SEL to pick either
0.0f or 1.0f.

No piglit regressions on Ivybridge.

total instructions in shared programs: 1642311 -> 1639449 (-0.17%)
instructions in affected programs:     136533 -> 133671 (-2.10%)
GAINED:                                0
LOST:                                  0

Programs that are affected appear to save between 1 and 5 instuctions
(just by skimming the output from shader-db report.py.

v2: s/b2i/b2f/ in commit subject (noticed by Chris Forbes).  Remove
extraneous fix_3src_operand (suggested by Matt).  The latter change
required swapping the order of the operands and using predicate_inverse.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
meta: save and restore swizzle for _GenerateMipmap

This makes sure to use a no-op swizzle while iteratively rendering each
level of a mipmap otherwise we may loose components and effectively
apply the swizzle twice by the time these levels are sampled.

Signed-off-by: Robert Bragg <robert@sixbynine.org>
Reviewed-by: Chris Forbes <chrisf@ijw.co.nz>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>