|
6136cbcb
|
2020-09-23T21:31:05
|
|
Metal: Implement transform feedback
- XFB is currently emulated by writing to storage buffers.
- Metal doesn't allow vertex shader to both write to storage buffers and
to stage output (i.e clip position). So if GL_RASTERIZER_DISCARD is
NOT enabled, the draw with XFB enabled will have 2 passes:
+ First pass: vertex shader writes to XFB buffers + not write to stage
output + disable rasterizer.
+ Second pass: vertex shader writes to stage output (i.e.
[[position]]) + enable rasterizer. If GL_RASTERIZER_DISCARD is
enabled, the second pass is omitted.
+ This effectively executes the same vertex shader twice. TODO:
possible improvement is writing vertex outputs to buffer in first
pass then re-use that buffer as input for second pass which has a
passthrough vertex shader.
- If GL_RASTERIZER_DISCARD is enabled, and XFB is enabled:
+ Only first pass above will be executed, and the render pass will use
an empty 1x1 texture attachment since rasterization is not needed.
- If GL_RASTERIZER_DISCARD is enabled, but XFB is NOT enabled:
+ we still enable Metal rasterizer.
+ but vertex shader must emulate the discard by writing gl_Position =
(-3, -3, -3, 1). This effectively moves the vertex out of clip
space's visible area.
+ This is because GLSL still allows vertex shader to write to stage
output when rasterizer is disabled. However, Metal doesn't allow
that. In Metal, if rasterizer is disabled, then vertex shader must
not write to stage output.
- See src/libANGLE/renderer/metal/doc/TransformFeedback.md for more
details.
Bug: angleproject:2634
Change-Id: I6c700e031052560326b7f660ee7597202d38e6aa
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2408594
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
|
|
|
1677cf14
|
2020-09-13T20:14:59
|
|
Metal: Implement Uniform buffers
Uniform buffer is implemented in two forms:
- If number of ubo used in shader program is low, each buffer will use
one discrete Metal buffer slot.
- If number of ubo used is large, they will be embedded into one Metal
argument buffer. Argument buffer is similar to Vulkan descriptor set.
This is due to limit of number of Metal's discrete buffer slots which
is only 31 and over half of them are already used by vertex
attributes, default uniforms, driver uniforms, etc. The downside is
that whenever a buffer binding is changed, the argument buffer must be
updated also.
Added empty TransformFeedbackMtl implementation to enable ES3 context
creation on Metal.
Bug: angleproject:2634
Change-Id: I69325696fac735cb45ab88ab55468c0991abc317
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2408593
Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
|
|
c5b5cf6c
|
2020-09-10T16:58:18
|
|
Refactor to pass ProgramMergedVaryings to link impl
Follow-on CL needs the ProgramMergedVaryings in the Vulkan backend to
generate valid SPIRV.
Bug: angleproject:3078
Change-Id: Ic442a3e0bd713fec36bd6b9420f67f3b1118e5ad
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2404336
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Courtney Goeltzenleuchter <courtneygo@google.com>
|
|
|
9277ee74
|
2020-07-06T12:40:58
|
|
Metal: Implement MSAA default framebuffer.
GL_SAMPLE_COVERAGE_VALUE is implemented by inserting gl_SampleMask
writing logic to fragment shader.
New test added: MultisampleTest.ContentPresevedAfterInterruption.
- Skip on D3D11 (Bug: angleproject:4609)
Bug: angleproject:2634
Change-Id: Ib44daf0baccc36ea320596d81713156047da059c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2281783
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
|
|
|
5e13757b
|
2020-05-11T00:50:00
|
|
Metal: Fix array of structs containing array of samplers bug.
Previously ProgramMtl could try to bind fixed slots to samplers based on
layout (set=..., binding=...). However, GLSL layout model is different
from Metal slots assignment. For example, The following is valid layout
in GLSL:
- array samplers A[2] is bound to index 0.
- array samplers B[2] is bound to index 1.
It is invalid to do so in Metal, since A occupies 2 slots, thus samplers
B[2] must be bound to slots starting from 2.
New binding method: let spirv-cross auto assigns the texture slots and
retrieve them after compilation.
Incomplete textures moved to ContextMtl using IncompleteTextureSet.
New test added: GLSLTest.ArrayOfStructContainingArrayOfSamplers.
Bug: angleproject:2634
Change-Id: Ib0edaaf8b20512e1272c37c1d4b16a88a5b35e75
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2193193
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
|
|
07467b4a
|
2020-03-20T10:40:56
|
|
Remove GL_CHROMIUM_path_rendering
Bug: chromium:1063193
Bug: angleproject:4270
Change-Id: I35b24b7d8d892181955e49dd2495655bc57cb0df
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2112275
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Commit-Queue: Geoff Lang <geofflang@chromium.org>
|
|
e5385ea9
|
2020-01-27T13:40:18
|
|
Vulkan: Compile shaders at link time
Since line raster emulation was changed to use specialization constants,
it has been possible to compile shaders at link time. However, program
pipeline objects would have required keeping the shader sources around
for recompilation. Now that all necessary decorations are modified
directly in SPIR-V, it's possible to compile the shaders at link time
and forget about their sources. Program pipeline objects then simply
"reconfigure" the generated SPIR-V.
A next step could be to also create the Vulkan pipeline object at link
time. A number of failures due to gaps in CTS testing prevent that work
currently. In particular, in some situations the generated SPIR-V is
not per spec, for example it may contain vertex attributes with aliasing
locations, or have transform feedback capture of array elements
misconfigured.
Bug: angleproject:3394
Bug: angleproject:4253
Change-Id: I54c0884cf056b511a4a306225cc6ed2cef84d257
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2023186
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
|
|
|
71e6afb1
|
2020-01-14T14:12:31
|
|
Vulkan: Set set/binding in SPIR-V
This change introduces a SPIR-V transformer that modifies shader
interface variable decorations directly in SPIR-V instead of
manipulating the input GLSL. Currently, descriptor set and binding
indices are set by the transformer.
The shader translator outputs arbitrary set and binding indices. Once
compiled by glslang, the SPIR-V transformer modifies these decorations.
The ultimate goal is to be able to modify the SPIR-V again when program
pipeline objects decide a different set/binding is necessary.
Bug: angleproject:3394
Change-Id: If358265a72bf1fe9f5676562b39a632cb2e05dc4
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2001477
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
|
|
|
fe26bae4
|
2019-10-29T18:38:53
|
|
Metal backend implementation pt 2
This is without Metal specific shader translator implemented yet.
Bug: angleproject:2634
Change-Id: I95d589442251c9ba111bd05a2dc379a36739046c
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1855069
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
|
|
|
d200a77a
|
2019-10-10T00:44:01
|
|
Metal backend skeleton implementation.
Bug: angleproject:2634
Change-Id: I34be82f4a80a6851fecb53a51e069b134d82613a
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1849079
Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
|