Commit graph

62084 commits

Author SHA1 Message Date
Tom Stellard
6974eb9076 radeon/llvm: Factor elf parsing code out into its own function
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
2014-03-07 13:31:52 -05:00
Tom Stellard
1f4a9fc84e radeon: Rename struct radeon_llvm_binary to radeon_shader_binary v2
And move its definition into r600_pipe_common.h;  This struct is a just
a container for shader code and has nothing to do with LLVM.

v2:
  - Drop unrelated Makefile change

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
2014-03-07 13:31:51 -05:00
Marek Olšák
d8fde8ffed gallium: rename R4A4 and A4R4 formats to match their swizzle
Like L4A4.

Reviewed-by: Brian Paul <brianp@vmware.com>
2014-03-07 18:07:05 +01:00
Marek Olšák
780ce576bb mesa: fix the format of glEdgeFlagPointer
Softpipe expects a float in the vertex shader, which is what glEdgeFlag
generates.

This fixes piglit/gl-2.0-edgeflag.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
2014-03-07 18:07:05 +01:00
Marek Olšák
472ac0db08 radeonsi: fix blit compressed texture workaround to support 2D arrays
We don't have a piglit test for this, but I think it's correct.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
2014-03-07 18:07:05 +01:00
Marek Olšák
fcdf6fa86c r600g: fix blitting the last 2 mipmap levels for Evergreen
This fixes a lot of compressedteximage piglit tests.

R600-R700 don't have this issue.

Cc: mesa-stable@lists.freedesktop.org
2014-03-07 18:07:05 +01:00
Marek Olšák
8a08051e2a r600g: fix texelFetchOffset GLSL functions
Cc: mesa-stable@lists.freedesktop.org
2014-03-07 18:07:05 +01:00
Marek Olšák
67aef6dafa winsys/radeon: if there's VRAM-only usage, keep it 2014-03-07 18:07:05 +01:00
Niels Ole Salscheider
f112ba03bb radeon: Use upload manager for buffer downloads
Using DMA for reads is much faster.

Signed-off-by: Niels Ole Salscheider <niels_ole@salscheider-online.de>
Signed-off by: Marek Olšák <marek.olsak@amd.com>
2014-03-07 18:07:05 +01:00
Brian Paul
b46e8622f1 glapi: use 'Mesa' in error messages
A user would have no idea what "_glthread_" is.  This removes the
last remaining instance of the _glthread_ string in Mesa.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
2014-03-07 09:04:01 -07:00
Brian Paul
6d2dffe8b1 st/mesa: add test_format_conversion() debug function
To check that the st_mesa_format_to_pipe_format() and
st_pipe_format_to_mesa_format() functions correctly convert
all corresponding Mesa/Gallium formats.

This found that MESA_FORMAT_YCBCR_REV was missing in
st_mesa_format_to_pipe_format().  Fixed that too.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
2014-03-07 07:31:29 -07:00
Brian Paul
d8f7e3d79e st/mesa: add MESA_FORMAT_R8G8B8A8_SRGB in st_mesa_format_to_pipe_format()
v2: rename patch after rebasing on top of Jose's changes.

Reviewed-by: Chia-I Wu <olvaffe@gmail.com>
2014-03-07 07:31:18 -07:00
José Fonseca
b3689adf51 mesa/st: Fix PIPE_FORMAT_R8G8B8A8_SRGB -> MESA_FORMAT_ conversion.
Copy'n'past typo introduced in my
1d8e3067fd commit.

This fixes swapped RB channels I was seeing in my test machines.

Trivial.
2014-03-07 13:35:24 +00:00
Kusanagi Kouichi
7233d4479e st/vdpau: Add rotation v2
v2: add static asserts

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Reviewed-by: Christian König <christian.koenig@amd.com>
2014-03-07 09:20:11 +01:00
Kusanagi Kouichi
e7e207658c vl: Add rotation v3
v2: rotate in gen_rect_verts instead
v3: clear rotate in vl_compositor_clear_layers,
    update calc_drawn_area as well

Signed-off-by: Kusanagi Kouichi <slash@ac.auone-net.jp>
Signed-off-by: Christian König <christian.koenig@amd.com>
2014-03-07 09:20:11 +01:00
Christian König
53d1d879d5 st/omx/enc: fix crash on destruction
Signed-off-by: Christian König <christian.koenig@amd.com>
2014-03-07 08:55:57 +01:00
Kenneth Graunke
378c6f2246 mesa: Drop unused hash_table::mem_ctx field.
It's never used, and it's equivalent to ralloc_parent(ht) if you really
need it.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
2014-03-06 20:55:34 -08:00
Michel Dänzer
9ceee5f4be clover: Fix build against LLVM SVN r203065 or newer
llvm/Linker.h was moved to llvm/Linker/Linker.h.

Reviewed-by: Tom Stellard <thomas.stellard@amd.com>
2014-03-07 11:12:12 +09:00
Brian Paul
0f0c16b238 mesa: add MESA_FORMAT_R8G8B8A8_SRGB
To match PIPE_FORMAT_R8G8B8A8_SRGB.
v2: fix component name copy&paste bugs

Reviewed-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
2014-03-06 18:17:14 -07:00
Matt Turner
8d3f739383 mesa: Wrap SSE4.1 code in #ifdef __SSE4_1__.
Because people insist on doing things like explicitly disabling SSE 4.1.

Cc: "10.0 10.1" <mesa-stable@lists.freedesktop.org>
Tested-by: David Heidelberger <david.heidelberger@ixit.cz>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=71547
2014-03-06 15:46:54 -08:00
Eric Anholt
c10896b593 i965: Fix render-to-texture in non-FinishRenderTexture cases.
We've had several problems now with FinishRenderTexture not getting called
enough, and we're ready to just give up on it ever doing what we need.  In
particular, an upcoming Steam title had rendering bugs that could be fixed
by always_flush_cache=true.

Instead of hoping Mesa core can figure out when we need to flush our
caches, just track what BOs we've rendered to in a set, and when we render
from a BO in that set, emit a flush and clear the set.

There's some overhead to keeping this set, but most of that is just
hashing the pointer -- it turns out our set never even gets very large,
because cache flushes are so common (even on cairo-gl).

No statistically significant performance difference in cairo-gl (n=100),
despite spending ~.5% CPU in these set operations.

v1: (Original patch by Eric Anholt.)
v2: (Changes by Ken Graunke.)
  - Rebase forward from May 7th 2013 -> March 4th 2014.
  - Drop the FinishRenderTexture hook entirely; after rebasing the
    patch, the hook was just an empty function.
  - Move the brw_render_cache_set_clear() call from
    intel_batchbuffer_emit_flush() to brw_emit_pipe_control_flush().
    In theory, this could catch more cases where we've flushed.
  - Consider stencil as a possible texturing source.
v3: (changes by anholt):
  - Move set_clear() back to emit_mi_flush() -- it means we can drop
    more forced flushes from the code.  In the previous location, it
    wouldn't have been called when we wanted pre-gen6.
  - Move the set clear from batch init to reset -- it should be empty at
    the start of every batch, since the kernel handled any inter-batch
    flush for us.
v4: Drop the debug code in set.c that I accidentally committed.

Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Tested-by: Dylan Baker <baker.dylan.c@gmail.com> [v2]
2014-03-06 11:35:17 -08:00
Brian Paul
1e25aa4cdb mesa: fix copy & paste bugs in pack_ubyte_SRGB8()
Cc: "10.0" "10.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Roland Scheidegger <sroland@vmware.com>
2014-03-06 11:39:41 -07:00
Brian Paul
9493fc729e mesa: fix copy & paste bugs in pack_ubyte_SARGB8()
Cc: "10.0" "10.1" <mesa-stable@lists.freedesktop.org>
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
2014-03-06 11:16:15 -07:00
Aaron Watry
fb78152678 gallium/util: Fix memory leak
Fix a leaked vertex shader in u_blitter.c

Signed-off-by: Aaron Watry <awatry@gmail.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>

CC: "10.1" <mesa-stable@lists.freedesktop.org>
2014-03-06 11:38:26 -06:00
José Fonseca
1d8e3067fd st/mesa: Add R8G8B8A8_SRGB case to st_pipe_format_to_mesa_format.
With the recent SRGB changes all my automated OpenGL llvmpipe tests
(piglit, conform, glretrace) start asserting with the backtrace below.

I'm hoping this change will fix it.  I'm not entirely sure, as this
doesn't happen in my development machine (the bug probably depends on
the exact X visual).

Anyway, it seems the sensible thing to do here.

   Program terminated with signal 5, Trace/breakpoint trap.
   #0  _debug_assert_fail (expr=expr@entry=0x7fa324df2ed7 "0", file=file@entry=0x7fa324e3fc30 "src/mesa/state_tracker/st_format.c", line=line@entry=758, function=function@entry=0x7fa324e40160 <__func__.34798> "st_pipe_format_to_mesa_format") at src/gallium/auxiliary/util/u_debug.c:281
   #0  _debug_assert_fail (expr=expr@entry=0x7fa324df2ed7 "0", file=file@entry=0x7fa324e3fc30 "src/mesa/state_tracker/st_format.c", line=line@entry=758, function=function@entry=0x7fa324e40160 <__func__.34798> "st_pipe_format_to_mesa_format") at src/gallium/auxiliary/util/u_debug.c:281
   No locals.
   #1  0x00007fa3241d22b3 in st_pipe_format_to_mesa_format (format=format@entry=PIPE_FORMAT_R8G8B8A8_SRGB) at src/mesa/state_tracker/st_format.c:758
           __func__ = "st_pipe_format_to_mesa_format"
   #2  0x00007fa3241c8ec5 in st_new_renderbuffer_fb (format=format@entry=PIPE_FORMAT_R8G8B8A8_SRGB, samples=0, sw=<optimised out>) at src/mesa/state_tracker/st_cb_fbo.c:295
           strb = 0x19e8420
   #3  0x00007fa32409d355 in st_framebuffer_add_renderbuffer (stfb=stfb@entry=0x19e7fa0, idx=<optimised out>) at src/mesa/state_tracker/st_manager.c:314
           rb = <optimised out>
           format = PIPE_FORMAT_R8G8B8A8_SRGB
           sw = <optimised out>
   #4  0x00007fa32409e635 in st_framebuffer_create (st=0x19e7fa0, st=0x19e7fa0, stfbi=0x19e7a30) at src/mesa/state_tracker/st_manager.c:458
           stfb = 0x19e7fa0
           mode = {rgbMode = 1 '\001', floatMode = 0 '\000', colorIndexMode = 0 '\000', doubleBufferMode = 0, stereoMode = 0, haveAccumBuffer = 0 '\000', haveDepthBuffer = 1 '\001', haveStencilBuffer = 1 '\001', redBits = 8, greenBits = 8, blueBits = 8, alphaBits = 8, redMask = 0, greenMask = 0, blueMask = 0, alphaMask = 0, rgbBits = 32, indexBits = 0, accumRedBits = 0, accumGreenBits = 0, accumBlueBits = 0, accumAlphaBits = 0, depthBits = 24, stencilBits = 8, numAuxBuffers = 0, level = 0, visualRating = 0, transparentPixel = 0, transparentRed = 0, transparentGreen = 0, transparentBlue = 0, transparentAlpha = 0, transparentIndex = 0, sampleBuffers = 0, samples = 0, maxPbufferWidth = 0, maxPbufferHeight = 0, maxPbufferPixels = 0, optimalPbufferWidth = 0, optimalPbufferHeight = 0, swapMethod = 0, bindToTextureRgb = 0, bindToTextureRgba = 0, bindToMipmapTexture = 0, bindToTextureTargets = 0, yInverted = 0, sRGBCapable = 1}
           idx = <optimised out>
   #5  st_framebuffer_reuse_or_create (st=st@entry=0x19dfce0, fb=<optimised out>, stfbi=stfbi@entry=0x19e7a30) at src/mesa/state_tracker/st_manager.c:728
   No locals.
   #6  0x00007fa32409e8cc in st_api_make_current (stapi=<optimised out>, stctxi=0x19dfce0, stdrawi=0x19e7a30, streadi=0x19e7a30) at src/mesa/state_tracker/st_manager.c:747
           st = 0x19dfce0
           stdraw = 0x640064
           stread = 0x1300000006
           ret = <optimised out>
   #7  0x00007fa324074a20 in XMesaMakeCurrent2 (c=c@entry=0x195bb00, drawBuffer=0x19e7e90, readBuffer=0x19e7e90) at src/gallium/state_trackers/glx/xlib/xm_api.c:1194
   No locals.
   #8  0x00007fa3240783c8 in glXMakeContextCurrent (dpy=0x194e900, draw=8388610, read=8388610, ctx=0x195bac0) at src/gallium/state_trackers/glx/xlib/glx_api.c:1177
           drawBuffer = <optimised out>
           readBuffer = <optimised out>
           xmctx = 0x195bb00
           glxCtx = 0x195bac0
           firsttime = 0 '\000'
           no_rast = 0 '\000'
   #9  0x00007fa32407852f in glXMakeCurrent (dpy=<optimised out>, drawable=<optimised out>, ctx=<optimised out>) at src/gallium/state_trackers/glx/xlib/glx_api.c:1211
   No locals.

Acked-by: Brian Paul <brianp@vmware.com>
2014-03-06 17:23:17 +00:00
Brian Paul
84094a273e glapi: remove u_mutex wrapper code, use c99 thread mutexes directly
v2: fix initializer mistake spotted by Chia-I Wu.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
2014-03-06 07:53:06 -07:00
Brian Paul
846a7e8630 glapi: rename u_current dispatch table functions
Put "table" in the names to make things more understandable.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
2014-03-06 07:47:12 -07:00
Brian Paul
280e065707 glapi: replace 'user' with 'context' in u_current.[ch] code
To make the functions more understandable.

Reviewed-by: Chia-I Wu <olv@lunarg.com>
2014-03-06 07:47:05 -07:00
Brian Paul
ef8a19ed4f glsl: fix compiler warnings in link_uniforms.cpp
With a non-debug build, gcc has two complaints:
1. 'found' var not used.  Silence with '(void) found;'
2. 'id' not initialized.  It's assigned by the UniformHash->get()
   call, actually.  But init it to zero to silence gcc.

Reviewed-by: Matt Turner <mattst88@gmail.com>
2014-03-06 07:45:36 -07:00
Ilia Mirkin
3649800009 mesa/st: only compare the one scissor
sizeof(scissor) returns the size of the full array rather than a single
element. Fix it to consider just the one element.

Fixes: 0705fa35 ("st/mesa: add support for GL_ARB_viewport_array (v0.2)")
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
Reviewed-by: Dave Airlie <airlied@redhat.com>
2014-03-05 22:51:58 -05:00
Chia-I Wu
4c68c6dcff st/mesa: make winsys fbo sRGB-capable when supported
The texture formats of winsys fbo are always linear becase the st manager
(st/dri for example) could not know the colorspace used.  But it does not mean
that we cannot make the fbo sRGB-capable.  By

 - setting rb->Visual.sRGBCapable to GL_TRUE when the pipe driver supports the
   format in sRGB colorspace,
 - giving rb an sRGB internal format, and
 - updating code to check rb->Format instead of strb->texture->format,

we should be good.

Fixed bug 75226 for at least llvmpipe and ilo, with no piglit regression.

v2: do not set rb->Visual.sRGBCapable for GLES contexts to avoid surprises

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75226

Reviewed-by: Brian Paul <brianp@vmware.com>
Tested-by: Michel Dänzer <michel.daenzer@amd.com>
2014-03-06 10:59:25 +08:00
Chia-I Wu
6d23ca1621 st/mesa: add mappings for MESA_FORMAT_B8G8R8X8_SRGB
The format is mapped to PIPE_FORMAT_B8G8R8X8_SRGB.

Reviewed-by: Brian Paul <brianp@vmware.com>
2014-03-06 10:59:25 +08:00
Chia-I Wu
5a27491a76 mesa: add MESA_FORMAT_B8G8R8X8_SRGB
The format is needed to represent an RGB-only winsys framebuffer that is
sRGB-capable.

Reviewed-by: Brian Paul <brianp@vmware.com>
2014-03-06 10:59:25 +08:00
Brian Paul
48a9094b69 mesa: fix packing/unpacking for MESA_FORMAT_A4R4G4B4_UNORM
Spotted by Chia-I Wu.
v2: also fix unpack_ubyte_ARGB4444_REV()

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Reviewed-by: Chia-I Wu <olv@lunarg.com>
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
2014-03-05 16:06:54 -07:00
Eric Anholt
171ec9585f i965: Fix predicated-send-based discards with MRT.
We need the header setup to not be predicated on which pixels are
undiscarded.  I'm not sure originally if I had thought that the mask
disable implied predicate disable, or if I had just misread the mask
disable as predicate disable.  Either way, I know I had spent more time
thinking about this in the gen8 generator than the gen7 generator.

Plus, it turns out that I had mis-implemented the "the GPU will use the
predicate unless this header is present" comment, by skipping setting up
the pixel mask when the header was present.

Fixes GPU hangs in piglit glsl-fs-discard-mrt, Trine, Trine 2 and
preusmably MLL.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=75207
Tested-by: Tapani Pälli <tapani.palli@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
2014-03-05 13:37:33 -08:00
Eric Anholt
9856d658ce configure: Fix bashism.
/bin/sh defaults to dash on debian.

Reviewed-by: Brian Paul <brianp@vmware.com>
2014-03-05 13:37:33 -08:00
Andreas Boll
c1958911f1 docs: update 10.2 release notes 2014-03-05 22:20:48 +01:00
Brian Paul
02cb04c68f mesa: remove remaining uses of _glthread_GetID()
It was really only used in the radeon driver for a debug printf.
And evidently, libGL.so referenced it just to work around some sort
of linker issue.

This patch removes the two calls to the function and the function
itself.

Fixes undefined _glthread_GetID symbol in libGL reported by 'nm'.
Though, the missing symbol doesn't cause any issues on my system but
it does cause glxinfo to fail on one of our test systems.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
2014-03-05 11:05:48 -07:00
Brian Paul
0b0114cc3b mesa: new init_teximage_fields_ms() function to init MS texture images
Before, it was kind of ugly to set the multisample fields with
assignments after we called _mesa_init_teximage_fields().

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
2014-03-05 11:05:47 -07:00
Rob Clark
4de1e5eddc WIP: freedreno/a3xx: incorrect scissor for binning pass
If scissor optimization is used (to avoid bringing scissored portions of
the render target into GMEM and then back out to system memory) in
combination with hw binning pass, the result would be a scissor mismatch
between binning pass and rendering pass.  This would cause rendering
bugs in some scenarios with (for example) gnome-shell.

I would have expected that simply using the correct screen-scissor
during the binning pass would be enough, but seems like there is
something else missing.  So for now disable binning pass if scissor
optimization is used.
2014-03-05 12:37:21 -05:00
Topi Pohjolainen
12d55d5f19 i965: Mark invariants in backend_visitor as constants
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:31:57 +02:00
Topi Pohjolainen
a290cd039c i965: Merge resolving of shader program source
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:31:44 +02:00
Topi Pohjolainen
81494ec613 i965: Merge initialisation of backend_visitor
Reviewed-by: Matt Turner <mattst88@gmail.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:20:21 +02:00
Topi Pohjolainen
afed5354aa i965/wm: Use resolved miptree consistently in surface setup
Most of the logic refers to the local variable 'mt' directly but
a few cases use 'intelObj->mt' instead. These are the same for
now but will be different once stencil miptree gets used.

v2 (Ian): fixed also indentation in surrounding lines

Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:19:19 +02:00
Topi Pohjolainen
9b169a1893 i965/vec4: Mark invariant members as constants in vec4_visitor
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:13:57 +02:00
Topi Pohjolainen
8a9b4ade03 i965: Mark sources for offset getters as constants
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
Signed-off-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
2014-03-05 10:13:05 +02:00
Ian Romanick
8f049dc298 docs: Import 10.1 release notes, add news item.
Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
2014-03-05 09:32:26 +02:00
Ilia Mirkin
c74783abfa nv50,nvc0: add 11f_11f_10f vertex support
Signed-off-by: Ilia Mirkin <imirkin@alum.mit.edu>
2014-03-04 21:54:54 -05:00
Kenneth Graunke
dfa1ab0e52 i965: Implement ARB_stencil_texturing on Gen8+.
On earlier hardware, we had to implement math in the shader to translate
Y-tiled or untiled coordinates to W-tiled coordinates (which is what
BLORP does today in order to texture from stencil buffers).

On Broadwell, we can simply state that it's W-tiled in SURFACE_STATE,
and adjust the pitch.  This is much easier.

In the surface state code, I chose to handle the "should we sample depth
or stencil?" question separately from the setup for sampling from
stencil.  This should make it work with the BindRenderbufferTexImage
hook as well, and hopefully be reusable for GL_ARB_texture_stencil8
someday.

v2: Update docs/GL3.txt (caught by Matt).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
2014-03-04 17:23:03 -08:00
Kenneth Graunke
23e81b93bb mesa: Add core API support for GL_ARB_stencil_texturing (from 4.3).
While the GL_ARB_stencil_texturing extension does not allow the creation
of stencil textures, it does allow shaders to sample stencil values
stored in packed depth/stencil textures.

Specifically, applications can call glTexParameter* with a pname of
GL_DEPTH_STENCIL_TEXTURE_MODE and value of either GL_DEPTH_COMPONENT or
GL_STENCIL_INDEX to select which component they wish to sample.  The
default value is GL_DEPTH_COMPONENT (for traditional depth sampling).

Shaders should use an unsigned integer sampler (presumably usampler2D)
to access stencil data.  Otherwise, results are undefined.  Using shadow
samplers with GL_STENCIL_INDEX selected also is undefined behavior.

This patch creates a new gl_texture_object field, StencilSampling, to
indicate that stencil should be sampled rather than depth.  (I chose to
use a boolean since I figured it would be more convenient for drivers.)
It also introduces the [Get]TexParameter code to get and set the value,
and of course the extension plumbing.

v2: Also consider textures incomplete when sampling stencil with
    non-NEAREST min/mag filters (caught by Eric Anholt).

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
2014-03-04 17:21:06 -08:00