OpenGL does whole-point clipping, that is a large point is either fully
clipped or fully unclipped (the latter means it may extend beyond the
viewport as long as the center is inside the viewport). d3d9 (d3d10 has
no large points) however requires points to be clipped after they are
expanded to a rectangle. (Note some IHVs are known to ignore GL rules at
least with some hw/drivers.)
Hence add a rasterizer bit indicating which way points should be clipped
(some drivers probably will always ignore this), and add the draw interaction
this requires. Drivers wanting to support this and using draw must support
large points on their own as draw doesn't implement vp clipping on the
expanded points (it potentially could but the complexity doesn't seem
warranted), and the driver needs to do viewport scissoring on such points.
Conflicts:
src/gallium/drivers/llvmpipe/lp_context.c
src/gallium/drivers/llvmpipe/lp_state_derived.c
Reviewed-by: Jose Fonseca <jfonseca@vmware.com>
Squashed commit of the following:
commit 04c5fa2cbb8e89d6f2fa5a75af1cca03b1f6b852
Author: José Fonseca <jfonseca@vmware.com>
Date: Tue Apr 23 17:37:18 2013 +0100
gallium: s/lower_left_origin/bottom_edge_rule/
commit 4dff4f64fa83b9737def136fffd161d55e4f1722
Author: José Fonseca <jfonseca@vmware.com>
Date: Tue Apr 23 17:35:04 2013 +0100
gallium: Move diagram to docs.
commit 442a63012c8c3c3797f45e03f2ca20ad5f399832
Author: James Benton <jbenton@vmware.com>
Date: Fri May 11 17:50:55 2012 +0100
gallium: Replace gl_rasterization_rules with lower_left_origin and half_pixel_center.
This change is necessary to achieve correct results when using OpenGL
FBOs.
Reviewed-by: Marek Olšák <maraeo@gmail.com>
This makes it possible to identify gl_TexCoord and gl_PointCoord
for drivers where sprite coordinate replacement is restricted.
The new PIPE_CAP_TGSI_TEXCOORD decides whether these varyings
should be hidden behind the GENERIC semantic or not.
With this patch only nvc0 and nv30 will request that they be used.
v2: introduce a CAP so other drivers don't have to bother with
the new semantic
v3: adapt to introduction gl_varying_slot enum
Conflicts:
src/gallium/auxiliary/tgsi/tgsi_strings.c
src/mesa/state_tracker/st_atom_clip.c
commit d919791f2742e913173d6b335128e7d4c63c0840
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Fri Jan 6 17:59:22 2012 +0100
d3d1x: adapt to new clip state
commit cfec82bca3fefcdefafca3f4555285ec1d1ae421
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Fri Jan 6 14:16:51 2012 +0100
gallium/docs: update for clip state changes
commit c02bfeb81ad9f62041a2285ea6373bbbd602912a
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Fri Jan 6 14:21:43 2012 +0100
tgsi: add TGSI_PROPERTY_PROHIBIT_UCPS
commit d4e0a785a6a23ad2f6819fd72e236acb9750028d
Author: Brian Paul <brianp@vmware.com>
Date: Thu Jan 5 08:30:00 2012 -0700
tgsi: consolidate TGSI string arrays in new tgsi_strings.h
There was some duplication between the tgsi_dump.c and tgsi_text.c
files. Also use some static assertions to help catch errors when
adding new TGSI values.
v2: put strings in tgsi_strings.c file instead of the .h file.
Reviewed-by: Dave Airlie <airlied@redhat.com>
commit c28584ce0d8c62bd92c8f140729d344f88a0b3cd
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Fri Jan 6 12:48:09 2012 +0100
gallium: extend user_clip_plane_enable to apply to clip distances
commit f1d5016c07f786229ed057effbe55fbfd160b019
Author: Marek Olšák <maraeo@gmail.com>
Date: Fri Jan 6 02:39:09 2012 +0100
nvfx: adapt to new clip state
commit 6f6fa1c26bd19f797c1996731708e3569c9bfe24
Author: Marek Olšák <maraeo@gmail.com>
Date: Fri Jan 6 01:41:39 2012 +0100
st/mesa: fix DrawPixels with GL_DEPTH_CLAMP
commit c86ad730aa1c017788ae88a55f54071bf222be12
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Tue Jan 3 23:51:30 2012 +0100
nv50: adapt to new clip state
commit 3a8ae6ac243bae5970729dc4057fe02d992543dc
Author: Christoph Bumiller <e0425955@student.tuwien.ac.at>
Date: Tue Jan 3 23:32:36 2012 +0100
nvc0: adapt to new clip state
commit 6243a8246997f8d2fcc69ab741a2c2dea080ff11
Author: Marek Olšák <maraeo@gmail.com>
Date: Thu Dec 29 01:32:51 2011 +0100
draw: initalize pt.user.planes in draw_init
This fixes a crash in glean/fpexceptions.
commit e3056524b19b56d473f4faff84ffa0eb41497408
Author: Marek Olšák <maraeo@gmail.com>
Date: Mon Dec 26 06:26:55 2011 +0100
svga: adapt to new clip state
commit c5bfa8b37d6d489271df457229081d6bbb51b4b7
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 14:11:51 2011 +0100
r600g: adapt to new clip state
commit f11890905362f62627c4a28a8255b76eb7de7df2
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 14:10:26 2011 +0100
r300g: adapt to new clip state
commit e37465327c79a01112f15f6278d9accc5bf3103f
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 12:39:16 2011 +0100
draw: adapt to new clip state
This adds a regression in the LLVM clipping path. Can anybody see anything
wrong with the code? It works for every other case, just glean/fpexceptions
crashes when doing the "Infinite clip plane test".
commit b474d2b18c72d965eefae4e427c269cba5ce6ba2
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 13:14:59 2011 +0100
u_blitter: don't save/set/restore clip state
commit 9dd240ea91f523a677af45e8d0adb9e661e28602
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 13:11:56 2011 +0100
gallium: don't cso_save/set/restore clip state
The enable bits are in the rasterizer state.
commit a4f7031179f5f4ad524b34b394214b984ac950f6
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 12:58:55 2011 +0100
gallium: default depth_clip to 1
depth_clip = !depth_clamp
commit fe21147a00ab90e549d63fe12ee4625c9c2ffcc3
Author: Marek Olšák <maraeo@gmail.com>
Date: Mon Dec 26 06:14:19 2011 +0100
trace,util: update state logging to new clip state
Also dump the other missing flags.
commit 2a3b96e84ac872dcc5bc1de049fe76bb58d64b23
Author: Marek Olšák <maraeo@gmail.com>
Date: Sun Dec 25 10:43:43 2011 +0100
st/mesa: adapt to new clip state
commit b7b656a42fca19d7c85267f42649a206a85a2c72
Author: Marek Olšák <maraeo@gmail.com>
Date: Sat Dec 17 15:45:19 2011 +0100
gallium: move state enable bits from clip_state to rasterizer_state
BTW this changes the gallium interface.
Some rather cosmetic changes by Marek.
Squashed commit of the following:
commit 513b37d484f0318311e84bb86ed4c93cdff71f13
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Thu Aug 26 18:17:54 2010 +0200
mesa/st: respect fragment clamping in st_DrawPixels
commit 546a31e42cad459d7a7a10ebf77fc5ffcf89e9b8
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Thu Aug 26 18:17:28 2010 +0200
mesa/st: support fragment and vertex color clamping
commit c406514a1fbee6891da4cf9ac3eebe4e4407ec13
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Tue Aug 24 21:56:37 2010 +0200
mesa/st: expose ARB_color_buffer_float if unclamping is supported
commit d0c5ea11b6f75f3da2f4ca989115f150ebc7cf8d
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Thu Aug 26 17:53:41 2010 +0200
mesa/st: use unclamped colors
This assumes that Gallium is to be interpreted as given drivers the
responsibility to clamp these colors if necessary.
commit aef5c3c6be6edd076e955e37c80905bc447f8a82
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Thu Aug 26 18:12:34 2010 +0200
mesa, mesa/st: handle read color clamping properly
We set IMAGE_CLAMP_BIT in the caller based on _ClampReadColor, where
the operation mandates it. (see the removed XXX comment. -Marek)
TODO: did I get the set of operations mandating it right?
commit 76bdfcfe3ff4145a1818e6cb6e227b730a5f12d8
Author: Luca Barbieri <luca@luca-barbieri.com>
Date: Thu Aug 26 18:18:25 2010 +0200
gallium: add color clamping to the interface
Don't need sprite coord origin per coord.
Also, don't need separate sprite enable bit - if all coords have it diabled,
then there are no point sprites (technically, there's a distinction in pre-GL3,
but it only differs in having more leniency in clamping to max size, something
the state tracker would need to handle and the hardware won't bother anyway).
Also, use packed field for the per-coord enables.
All in all, should save 3 dwords in rasterizer state (from 10 down to 7).
The state tracker is responsible for clamping to any graphics API enforced
size min/max limits for both the static point_size setting as well as per
vertex point size (in the vertex shader).
Note that mesa state tracker didn't actually use these values.
Roland Scheidegger
José Fonseca
Christoph Bumiller
Brian Paul
Marek Olšák
Luca Barbieri
Keith Whitwell
Corbin Simpson
Michal Krol