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c39a19aa
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2017-07-07T18:52:09
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Select viewport index in the GLSL/ESSL vertex shader
The patch enables viewport selection for multiview rendering in the
GLSL/ESSL vertex shader through the use of the GL_NV_viewport_array2
extension. The AST is modified only for GLSL and ESSL to include the
viewport selection expression after ViewID_OVR's initialization.
BUG=angleproject:2062
TEST=angle_unittests
Change-Id: Iee05bb5a4b687ed53ddbdd466f1572227b1f0cde
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7ef89a42
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2017-07-05T14:23:06
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Expose ViewID_OVR impostor in the fragment shader
The OVR_multiview specification states that gl_ViewID_OVR is visible
at each pipeline stage. Previously to this patch the ViewID_OVR
impostor was declared only in the vertex shader and occurrences of
gl_ViewID_OVR in the fragment shader were not being handled. The
patch addresses the issue by declaring the ViewID_OVR variable as
a vertex output in the vertex shader and as a fragment input
in the fragment shader.
BUG=angleproject:2062
TEST=angle_unittests
Change-Id: I895953e81d3632d9bb873e8ac081fdf36f63f6b7
Reviewed-on: https://chromium-review.googlesource.com/559337
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
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cccf2b00
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2017-07-05T14:50:54
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Reorganize AST traversal utility code
Define TIntermTraverser and TIntermLValueTrackingTraverser in a
separate header file. hash() function is moved out from
TIntermTraverser as it is not related to the core functionality
of traversing and transforming ASTs.
Also reorganize some traversers to follow common conventions:
- Intermediate output is now in OutputTree.h/.cpp
- Max tree depth check is now in IsASTDepthBelowLimit.h/.cpp
BUG=angleproject:1490
TEST=angle_unittests
Change-Id: Id4968aa9d4e24d0c5bac90dc147fc9f310de0184
Reviewed-on: https://chromium-review.googlesource.com/559531
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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115fc55e
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2017-07-05T17:11:06
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Populate gl_InstanceID attribute information explicitly
While compiling ESSL1 shaders, with the compiler having both
SH_INITIALIZE_BUILTINS_FOR_INSTANCED_MULTIVIEW and SH_VARIABLES
set, variable collection terminates with an assertion failure. The reason
behind this is that SH_INITIALIZE_BUILTINS_FOR_INSTANCED_MULTIVIEW
adds gl_InstanceID to the AST to initialize the multiview builtins, but
the variable collection pass cannot find gl_InstanceID information in
the symbol table because the builtin is only available in ESSL 3.00 and
greater.
To address this the patch populates the gl_InstanceID attribute
information explicitly in the variable collection pass instead of
retrieving it from the symbol table.
BUG=angleproject:2062
TEST=angle_unittests
Change-Id: I5ecb9967ebe6658e956d17a2637090f9b685ef33
Reviewed-on: https://chromium-review.googlesource.com/559669
Reviewed-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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0cdf3683
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2017-07-05T14:02:08
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Do not propagate OVR_multiview extension directive
The patch fixes the bug of having the OVR_multiview extension directive
being outputted by the ESSL translator whenever the
SH_INITIALIZE_BUILTINS_FOR_INSTANCED_MULTIVIEW option is enabled. The
directive should not be outputted because the extension is emulated
through that option.
BUG=angleproject:2062
TEST=angle_unittests
Change-Id: I95d0a651ace6db42d496de08e774ec7ceca4c197
Reviewed-on: https://chromium-review.googlesource.com/558981
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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69056a1e
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2017-05-18T11:14:50
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Declare and initialize ViewID_OVR and InstanceID
The patch modifies the vertex shader's AST to declare and initialize
the global variables ViewID_OVR and InstanceID. Every occurrence of
gl_ViewID_OVR gets replaced by ViewID_OVR and initialized in main
with a value dependent on gl_InstanceID and the number of views.
To guarantee correct results for instanced rendering, each occurrence
of gl_InstanceID is replaced with InstanceID and initialized similarly.
BUG=angleproject:2062
TEST=angle_unittests
Change-Id: I48be688605b5af869bc370758e70ccc209ea4419
Reviewed-on: https://chromium-review.googlesource.com/548596
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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95468d17
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2017-05-04T11:14:34
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Support multiview in ESSL 1.00 shaders
Support is added according to the proposal for WEBGL_multiview. When
the multiview extension is enabled in an ESSL 1.00 shader, num_views
can be specified using a layout qualifier. To support this, enabling
the multiview extension makes "layout" a keyword rather than an
identifier in ESSL 1.00.
The type of gl_ViewID_OVR is also different in case of ESSL 1.00: it
has to be a signed integer, since unsigned integers are not supported
in ESSL 1.00.
Some existing tests for multiview shaders are extended in this patch.
The changes make sure that vertex shader "in" qualifier is still
allowed in ESSL 3.00 multiview shaders, since this patch adds code to
disallow it in ESSL 1.00 multiview shaders.
BUG=angleproject:1669
TEST=angle_unittests
Change-Id: I65dbbbebabdb24cf0bb647d40aa80cebf713c4f7
Reviewed-on: https://chromium-review.googlesource.com/506088
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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7142f6ce
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2017-05-05T17:07:26
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Prevent using gl_ViewID_OVR as an l-value
It's a shader input and as such should not be writable.
BUG=angleproject:1669
TEST=angle_unittests
Change-Id: I05cb5c63b7272dfa6e80cad57385da02504e4d8f
Reviewed-on: https://chromium-review.googlesource.com/497408
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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1d9dcc24
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2017-01-19T11:25:32
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Make AST path always include the current node being traversed
AST traversers tend to sometimes call traverse() functions manually
during PreVisit. Change TIntermTraverser so that even if this happens,
all the nodes are automatically added to the traversal path, instead
of having to add them manually in each individual AST traverser.
This also makes calling getParentNode() return the correct node during
InVisit.
This does cause the same node being added to the traversal path twice
in some cases, where nodes are repeatedly traversed, like in
OutputHLSL, but this should not have adverse side effects. The more
common case is that the traverse() function is called on the children
of the node being currently traversed.
This fixes a bug in OVR_multiview validation, which did not previously
call incrementDepth and decrementDepth when it should have.
BUG=angleproject:1725
TEST=angle_unittests, angle_end2end_tests
Change-Id: I6ae762eef760509ebe853eefa37dac28c16e7a9b
Reviewed-on: https://chromium-review.googlesource.com/430732
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
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2f90a9b5
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2017-01-10T12:27:56
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Fix shader support of OVR_multiview
Fix up incorrect capitalization of gl_ViewID_OVR in a few places.
Also add extension macro test to compiler unit tests.
BUG=angleproject:1669
TEST=angle_unittests
Change-Id: Ia7fdd747ad08355cdc149db9e2e7911c2e673af5
Reviewed-on: https://chromium-review.googlesource.com/425851
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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09b04a2f
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2016-12-15T13:30:26
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Add shader translator support for OVR_multiview
The OVR_multiview and OVR_multiview2 extensions add gl_ViewID_OVR to
shaders. gl_ViewID_OVR can be translated either as is in GLSL output
or as a uniform by setting the SH_TRANSLATE_VIEWID_OVR_AS_UNIFORM
compiler flag.
If WebGL output is selected, the shaders will be validated according
to proposed rules in the WEBGL_multiview spec.
BUG=angleproject:1669
TEST=angle_unittests
Change-Id: I19ea3a6c8b4edb78be03f1a50a96bfef018870d0
Reviewed-on: https://chromium-review.googlesource.com/422848
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
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