extensions/ANGLE_shader_pixel_local_storage.txt

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Chris Dalton f95cbef4 2025-09-07T17:50:37 Reland "Add a "noncoherent" layout qualifier to PLS" This is a reland of commit ef9c5ce43110f4f8ba56124bdee927944ce3ddd1 with an invalid assert removed. Original change's description: > Add a "noncoherent" layout qualifier to PLS > > Raster ordering can be expensive. If an app knows the geometry in a draw > does not overlap, it can mark the PLS planes as noncoherent and opt for > using barriers instead. > > Bug: angleproject:40096838 > Change-Id: I2d686c2e64f51940face186637a9fcadcc251bef > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6923300 > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Kenneth Russell <kbr@chromium.org> > Commit-Queue: Chris Dalton <chris@rive.app> Bug: angleproject:40096838 Change-Id: I55077a973063427dfb0d510c87e75ec86ce8bb43 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6991929 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Brian Sheedy 44db20f2 2025-09-17T15:57:09 Revert "Add a "noncoherent" layout qualifier to PLS" This reverts commit ef9c5ce43110f4f8ba56124bdee927944ce3ddd1. Reason for revert: Causes issues on Apple silicon crbug.com/445727125 Original change's description: > Add a "noncoherent" layout qualifier to PLS > > Raster ordering can be expensive. If an app knows the geometry in a draw > does not overlap, it can mark the PLS planes as noncoherent and opt for > using barriers instead. > > Bug: angleproject:40096838 > Change-Id: I2d686c2e64f51940face186637a9fcadcc251bef > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6923300 > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> > Reviewed-by: Kenneth Russell <kbr@chromium.org> > Commit-Queue: Chris Dalton <chris@rive.app> Bug: angleproject:40096838 No-Presubmit: true No-Tree-Checks: true No-Try: true Change-Id: Ibc24bed27cec406b6e4ffa9aaa8fe3a2110b58ba Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6962955 Reviewed-by: Kenneth Russell <kbr@chromium.org> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Commit-Queue: Brian Sheedy <bsheedy@chromium.org>
Kenneth Russell baeea13f 2025-09-11T10:51:33 PLS: enforce rules around color attachment 0. Generate INVALID_OPERATION during draw calls if the following two rules are not satisfied: 1. If the fragment shader declares index zero output, then attachment zero must be present, and have a compatible numeric type. 2. If attachment zero is present, it must be enabled. This avoids complex and error-prone workarounds on macOS with AMD GPUs, and enforces the same simple and consistent rules on all platforms. Bug: angleproject:402810076 Change-Id: If029f677ca645060b8e7c2c4040e8a26d2aa2eb5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6937659 Reviewed-by: Chris Dalton <chris@rive.app> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton ef9c5ce4 2025-09-07T17:50:37 Add a "noncoherent" layout qualifier to PLS Raster ordering can be expensive. If an app knows the geometry in a draw does not overlap, it can mark the PLS planes as noncoherent and opt for using barriers instead. Bug: angleproject:40096838 Change-Id: I2d686c2e64f51940face186637a9fcadcc251bef Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6923300 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Geoff Lang 9812b972 2025-03-05T16:25:45 PLS: Validate rendering feedback loops of PLS planes Validate that active textures are not bound as PLS planes in WebGL compatibility mode using the same validation as for regular framebuffer attachments. Update the PLS spec to not generate an error for feedback loops but update the definition of feedback loops to include PLS planes. The WebGL spec is dependent on this definition and makes this feedback loop an error. Bug: angleproject:40096838 Change-Id: I597efef3685da7bfb2a9d149a9ec3bc9d01e6e4d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6330519 Commit-Queue: Geoff Lang <geofflang@chromium.org> Reviewed-by: Chris Dalton <chris@rive.app>
Alexey Knyazev 27cfdf8e 2025-04-24T00:00:00 PLS: Allow type conversions in state queries The OpenGL ES spec requires data conversions when a query command is issued that returns a data type different from the actual type of the requested state. * Updated PLS state queries to follow the main spec. * Removed PLS state query dependencies on interruptions. * Fixed non-robust command declarations in the extension spec. * Added missing extension support checks to robust commands. * Drive-by: Fixed invalid use of assertions in PLS tests. Fixed: angleproject:414361744 Fixed: angleproject:414506466 Change-Id: I573ab66d194d5666fd9c8845ac0ab262a714c5cf Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6507065 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
Chris Dalton 0f356a34 2025-04-02T14:14:43 Update invalidation commands to disable PLS Previously, commands that flush or invalidate tiled memory were specified to generate an error if issued while PLS was active. Remove all provisions around Flush(), Finish() and ClientWaitSync(), and add a test to ensure these commands have no effect on PLS. The reason we can make this change now is because we no longer support EXT_shader_pixel_local_storage, which previously prevented us from allowing these 3 commands. Update the invalidation commands to disable PLS instead. This is more in line with the general design pattern of PLS. Update the wording of the spec to reflect this better organization. Also clean up some legacy code that was no longer used. Bug: angleproject:40096838 Change-Id: I9687deaf17a583f8757ffcd050eda154b4e7a949 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6427324 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Alexey Knyazev f94b8ed1 2025-03-24T00:00:00 Allow PLS planes backed by cube map faces Adjusted extension validation and spec language. Bug: angleproject:40096838 Change-Id: I6e36fe63ed9d9d91a92298e3471b084b225ecfd9 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6394235 Reviewed-by: Chris Dalton <chris@rive.app> Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Chris Dalton ea58cc5d 2025-03-21T10:06:18 PLS: Validate mip level bindings are within base/max range It is undefined behavior for imageLoad/imageStore to access a mipmap level outside the effective base/max range. Since PLS may be implemented with shader images, we need to require that the mip level bindings on active planes are within this range. Bug: angleproject:40096838 Change-Id: I539016d94db161f1af0ae1bd496a123b78fb51dd Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6382273 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton ac37e500 2025-03-18T14:07:28 Validate PLS texture slice collisions Generate errors when: * A single texture slice is bound to more than one active pixel local storage plane. * A single texture slice is simultaneously bound to an active pixel local storage plane and attached to an enabled drawbuffer. Bug: angleproject:40096838 Change-Id: I51f7260a36df94ac35deaaa2fbf7e81f56f06563 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6370082 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Chris Dalton 292bb458 2025-03-14T12:17:49 Cut MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE_ANGLE Since the number of real devices that support framebuffer fetch, but do not support draw_buffers_indexed, is effectively zero, MAX_COLOR_ATTACHMENTS_WITH_ACTIVE_PIXEL_LOCAL_STORAGE_ANGLE is an unnecessary complication. These hypothetical devices can fall back on shader images or just not support pixel local storage at all. This closes the door for WEBGL_shader_pixel_local_storage to ever be implemented on top of the ES2 extension that inspired it all, EXT_shader_pixel_local_storage, but WebGL can just use framebuffer fetch instead, or maybe even EXT_shader_pixel_local_storage2 some day. This dramatically simplifies the WEBGL_shader_pixel_local_storage extension. Bug: angleproject:40096838 Change-Id: I9c51f2ce000620f883cb7917d4e8618c8e9ee803 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6354657 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton ae71cc1c 2025-03-11T16:36:52 Don't destroy blend or color mask state in PLS The browser caches this state, so conditionally destroying it would invalidate the browser's cache. Instead, cache modifications to overridden PLS blend & color mask state in ContextPrivateState, and restore it upon ending PLS. Also update the spec to specify that FRAMEBUFFER_DEFAULT_WIDTH and FRAMEBUFFER_DEFAULT_HEIGHT may be overridden during PLS in ES 3.1. Bug: angleproject:40096838 Change-Id: Ic2c0aa6dc33ada7350e15e27bef22c79ca5f6c7f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6350727 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton b600a42c 2025-03-13T15:18:40 Remove the PLS allow list All the interactions with render passes have been properly solved now, and there is no longer a need for the allow list. Bug: angleproject:40096838 Change-Id: I0219fb8824820e076c128f10f49c85f0f76270ef Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6355312 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 97083463 2025-03-10T09:07:16 Polish PLS interactions with xform feedback & QCOM_tiled_rendering For the simplest integration with WebGL, it was decided that glBeginTransformFeedback() and glStartTilingQCOM() should implicitly disable PLS, whereas glBeginPixelLocalStorageANGLE() should fail if either of these modes are active. Bug: angleproject:40096838 Change-Id: I859a496c99c60c5b040c5eac542f43d85872eb30 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6339788 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 4b39a6a9 2025-03-08T14:16:29 Generate errors for framebuffer invals during PLS Generate GL_INVALID_OPERATION for InvalidateFramebuffer, InvalidateSubFramebuffer, and DiscardFramebufferEXT (and add them to the PLS allow list so we can test the new validation). This is part of a final preparation before deleting the allow list. Bug: angleproject:40096838 Change-Id: If8ffb9c1998ca739798171ae4643a3c9ad3ee049 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6335750 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 1ead4cbd 2025-03-07T09:49:21 Allow texture modification commands while PLS is active Just do a little extra validation and bounce modifications if they would modify an active PLS plane. Bug: angleproject:40096838 Change-Id: I6f27951f5d0ef5dfaf23b5a005a2d94a749e2c4f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6337703 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 35ffe55c 2025-03-09T15:00:27 Block framebuffer queries on overridden PLS state Generate an error from glGetFramebufferAttachmentParameteriv() when querying a color attachment that has been overridden by PLS. Bug: angleproject:40096838 Change-Id: I83e68c3527f034f9a24822cf4f57789f81b9b6af Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6338390 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Alexey Knyazev <lexa.knyazev@gmail.com> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 6c2737be 2025-03-06T13:09:44 Allow RASTERIZER_DISCARD while PLS is active Writes to pixel local storage can just be discarded as normal. The only special interaction we need is that BeginPixelLocalStorageANGLE always clears the PLS attachments, even if RASTERIZER_DISCARD is enabled. Bug: angleproject:40096838 Change-Id: I43d00af96b287134d73f08802cea58694fe7d717 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6332026 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton be98f841 2024-11-30T02:11:05 Implicitly end PLS for framebuffer reads and writes In preparation for removing the PLS allow list, convert more problematic methods to the new paradigm of implicitly ending PLS instead of generating errors. Also simplify the disable logic for framebuffer modifications, and just blindly disable PLS for framebuffer updates, regardless of whether it's GL_READ_FRAMEBUFFER or GL_DRAW_FRAMEBUFFER. Bug: angleproject:40096838 Change-Id: Ie4390a219f5f05ef0a3d00f405d4914592726283 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6077335 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton cc841237 2024-11-29T13:45:50 Accept framebuffer modifications while PLS is active The only way for a WebGL implementation to know if PLS is actually active is to call glGetIntegerv(PIXEL_LOCAL_STORAGE_ACTIVE_PLANES_ANGLE) (because glBeginPixelLocalStorageANGLE() can fail). So the original behavior of not allowing glBindFramebuffer() et. al. while PLS was active created a state scenario that was expensive for the browser to track. Instead, just allow glBindFramebuffer() et. al., and implicitly disable PLS if they are called while it's active. Bug: angleproject:40096838 Change-Id: Ibd303f9f9950fb5b7f1add2d41882e4379c51e62 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6060301 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 7070a9e9 2024-11-20T00:21:16 Remove draw buffer validation clauses from PLS It was cumbersome to implement all this validation browser side for WebGL. Rather than making it an error to update blend and color mask on reserved PLS draw buffers, glBeginPixelLocalStorageANGLE() can just implicitly disable blend, and enable the color mask on overridden draw buffers. Later calls to enable blend or change the color mask on overridden planes are silently ignored until glEndPixelLocalStorageANGLE(). Bug: angleproject:40096838 Change-Id: Ic7e1c5113e7d3fad3b80d0178075df646540d743 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6045421 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Alexey Knyazev 2cbac2cf 2024-05-30T00:00:00 Disallow TEXTURE_3D for PLS Using 3D texture slices as PLS planes would require inefficient emulation on some backends. Bug: angleproject:8124 Bug: angleproject:8125 Change-Id: I8fcd4e686bf607deef27a8c091486a9012732f24 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5594092 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
Alexey Knyazev 147ba459 2024-05-30T00:00:00 Allow polygonMode* commands with active PLS Drive-by: * Test that polygonOffsetClampEXT is allowed when PLS is active. Fixed: angleproject:345253437 Change-Id: I5d9f60b3e70eaf8da19017a8b9d6c2592cb4f4f8 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5601849 Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 7d4c6d1d 2023-05-09T12:19:54 Allow glDelete* while PLS is active Banning glDelete* is extremely dangerous. It will almost definitely cause memory leaks in client code, and it makes JS garbage collection needlessly complex. Instead, specify that PLS is implicity deactivated if the client deletes anything that is attached to the current draw framebuffer during a PLS rendering pass. Bug: chromium:1421437 Change-Id: I3a18ee6b5d5567431e6fa3eccea58cb049845502 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4521436 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 45f91a8c 2023-05-08T13:11:44 Deinitialize PLS planes when their texture is deleted The spec originally called for PLS planes to be converted to memoryless when their texture was deleted, but this is not compatible with WebGL, which does not support memoryless planes. Change the behavior to deinitialize them instead. This change requires the addition of a new observer message, angle::SubjectMessage::TextureIDDeleted, which PLS uses to deinitialize a plane when the app deletes its texture. Bug: chromium:1421437 Change-Id: I58fd91003747160f0a1abc1a8a7a87668890ba1f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4518565 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 7aadc962 2023-05-05T19:28:17 Ban transform feedback and blend extensions with PLS Transform feedback can lead to render pass breaks in the Vulkan backend. EXT_blend_func_extended may restrict the number of draw buffers depending on API state, which can invalidate a PLS implementation. KHR_blend_equation_advanced does not allow multiple draw buffers, which is required by some PLS implementations. Bug: angleproject:7279 Change-Id: Id89f0e485ee65f55d802b121018f13b0028d8029 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4510716 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Kenneth Russell <kbr@chromium.org>
Chris Dalton ef20f191 2023-03-29T14:05:04 Make the PLS allow list more permissive Allow ClipControlEXT, FlushMappedBufferRange, Gen*, PolygonOffset*, ProvokingVertexANGLE, and KHR_debug commands. Allow caps DEPTH_CLAMP_EXT, CLIP_DISTANCE[0..7]_EXT. Ban indexed caps besides BLEND, SCISSOR_TEST, SCISSOR_TEST_EXCLUSIVE_NV. Clarify that the index restrictions on indexed caps only apply to BLEND. Bug: chromium:1421437 Change-Id: Ibdb0acaebfa992ad37c928481d5ecb10496f22e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4382502 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 1e166daf 2023-04-10T23:49:46 Finalize PLS support for non-2D texture types Commit to supporting GL_TEXTURE_2D_ARRAY and GL_TEXTURE_3D, and add tests. Suppress D3D11 and Metal for now, since shader image support for non-2D types needs some work on those backends. Drop support for cube maps, since those will cause complications on an implementation based on texelFetch. Bug: chromium:1421437 Bug: angleproject:8124 Bug: angleproject:8125 Change-Id: I403ae157b7d2609f2190a98c2576c92f73441412 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4415150 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton a491bbe3 2023-03-18T19:05:08 Add PLS utilities for interrupting a rendering pass Adds two more simple commands to ANGLE_shader_pixel_local_storage that allow WebGL and the command buffer to interrupt rendering passes without having to either (1) make expensive queries, or (2) track lots of complex state for validation that they are not currently equipped to track. Bug: chromium:1421437 Change-Id: I80eaef3ae6b0b4bbbecb9cd2268ac90b43675d1c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4355032 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Kenneth Russell <kbr@chromium.org>
Chris Dalton 513ca723 2023-03-13T14:30:20 Delete GL_LOAD_OP_DISABLE_ANGLE from PLS This load op makes the PLS spec and WebGL implementations unnecessarily complex. Bug: chromium:1421437 Change-Id: Iab02a8b02083899c6cc345ecb25b88c5871611c9 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4335148 Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton b468e4dd 2023-03-08T14:21:47 Add back "non-robust" PLS queries Chrome doesn't have a codegen template for queries that model the "robust" signature, so support both types. Specify that the robust variants are only supported if ANGLE_robust_client_memory is supported, so Chrome and other implementations don't have to support them. Bug: chromium:1421437 Change-Id: Icc69b69ce9ce0a2cfad0dbeed1f3b29bcfa92d20 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4321867 Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Geoff Lang <geofflang@chromium.org>
Chris Dalton f2e13539 2023-03-03T01:57:43 Implicitly enable PLS dependency extensions The ANGLE_shader_pixel_local_storage implementation makes internal use of various other extensions. These extensions must be implicitly enabled when ANGLE_shader_pixel_local_storage is in use. In this CL: * Convert ANGLE_shader_pixel_local_storage and ANGLE_shader_pixel_local_storage_coherent to requestable extensions. * Implicitly enable the dependency extensions, including each other, at the time either of these extensions is enabled. Bug: angleproject:7279 Bug: chromium:1421437 Change-Id: I26acbda776fe7045ea99d4f1e3df445e7a5cfd7f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4306526 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton a65f6a9d 2023-03-07T16:11:44 Make PLS queries robust There's no reason not to mirror the ANGLE_robust_client_memory API here. Bug: chromium:1421437 Change-Id: Ifb8b1a9675abe2ceb35272dc905f3c38f29dceda Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4317485 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton eb1a13d8 2022-12-06T21:56:42 Improve PLS load and store op tokens Define more new tokens that are more clearly named, as opposed to recycling tokens that were meant for a different purpose. Bug: angleproject:7279 Change-Id: I840e5ea168235c49eec2693b2231c2d329027b0e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4082057 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Chris Dalton 9bda9a79 2022-10-22T22:05:11 Add Store Ops to pixel local storage Browsers will need the ability to pre-empt pixel local storage, which means every plane will need a backing store to dump to. Store Ops allow the app to still avoid memory transactions at the end of PLS even if their plane has a backing texture. Bug: angleproject:7279 Change-Id: I3a3efa21773f87c03cd346a996e3c638028c68ab Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3974652 Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Chris Dalton 3605b399 2022-10-20T17:00:02 Move PLS clear values back into context state The API that required packing raw data into a buffer was un-ergonomic for developers and difficult to implement for WebGL vendors. Bug: angleproject:7279 Change-Id: If7c98908c285462c5775e8e2d8811883be139f64 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3972376 Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 9f693aa3 2022-10-22T14:45:59 Implement an allow list for PLS In order to guarantee no data is lost while using the EXT_shader_pixel_local_storage extension, we need to restrict applications to a small subset of commands while pixel local storage is active. This CL implements the allow list for GL entrypoints using wildcard matching inside the code generator, and adds custom validation for the more specific restrictions that go into effect when PLS is active. Bug: angleproject:7279 Change-Id: I5dd48bd93c10e8775f32be32a4fcf17855eb2f0e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3932552 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton a7dc51f2 2022-10-01T08:49:11 Add a framebuffer fetch implementation of PLS The framebuffer fetch implementation works by attaching PLS backing textures to the framebuffer, and then rewriting PLS uniforms as "inout" fragment variables. The compiler's existing machinery takes it from there and makes it work on GL and Vulkan, and soon Metal. EXT_shader_framebuffer_fetch is now the preferred backend for pixel local storage, but we also use EXT_shader_framebuffer_fetch_non_coherent if shader images can't be coherent. This is especially interesting for Vulkan, since noncoherent framebuffer fetch is possible without any extensions. Bug: angleproject:7279 Bug: angleproject:7683 Bug: angleproject:7684 Bug: angleproject:7724 Change-Id: I33f3b2c6df9a5709969d9165c448ea71b096c9e1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3900142 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 8b2aff28 2022-09-12T10:27:28 Implement the ANGLE_shader_pixel_local_storage API Implements the OpenGL ES API for ANGLE_shader_pixel_local_storage and adds thorough validation and testing as outlined in the spec. This feature is still implemented entirely in the frontend, but the extension now works end-to-end with a passing test suite, and can be used externally. Over time we can start gradually moving the implementation into backends as appropriate. Bug: angleproject:7279 Bug: angleproject:7647 Change-Id: I1c861a0fca96423be02e17bbe1fb7f57b99ea63f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3886462 Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton 7822c9df 2022-09-10T14:17:21 Delete FramebufferPixelLocalClearValue{f,i,ui}vANGLE Instead, BeginPixelLocalStorageANGLE just accepts a buffer containing clear values. In WebGL, the clear data can be an array of Numbers. This makes the API smaller, simpler, and less stateful and bug-prone. Bug: angleproject:7279 Change-Id: I8b3fa4ae7f20ba3ad72beb01f275acf50eee803c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3888960 Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Chris Dalton 6fde3568 2022-08-09T16:42:17 Spec out the PLS client API Drafts the additions to the OpenGL ES 3.0 spec for pixel local storage. Bug: angleproject:7279 Change-Id: Ibc0d227142ac51f5d3820f27c9114779d846ffc2 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3824171 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>
Chris Dalton 4a636cdd 2022-07-20T22:44:30 Require all PLS formats to consume exactly 4 bytes of storage D3D 11.0 UAVs only support R32_FLOAT, R32_UINT, R32_SINT formats. EXT_shader_pixel_local_storage explicitly states that all PLS variables consume exactly 4 bytes. ESSL images can only have both read and write access if their format is r32f, r32i, r32ui. (We were able to circumvent this via aliasing, but it was a huge source of bugs.) There is a large precedent for only supporting 4 bytes of storage in the capabilities we use for PLS, so this CL removes support for all PLS storage formats that are not 4 bytes. It also implements an "R32" mode for PLS, that does manual packing and unpacking of r32* image formats. If the application wants larger formats, it can always define multiple PLS planes and piece them together. Next up we ought to be able to support rg16* types with more packing/unpacking. With aliasing gone, and with a bit of tweaking, the PLS tests now pass on the Pixel 4 GLES bot. Bug: angleproject:7279 Bug: angleproject:7388 Bug: angleproject:7524 Bug: angleproject:7527 Change-Id: I6b8f62c2428ade6cb5413e33360d734e55dda0eb Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3782579 Reviewed-by: Stephen White <senorblanco@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton aa7e6751 2022-07-15T23:33:30 Automatically enable early_fragment_tests when PLS is declared When PLS is polyfilled by shader images, we need early_fragment_tests in order to match the same depth/stencil behavior as when it is implemented as framebuffer fetch. Bug: angleproject:7279 Change-Id: I37f5a8682cc96a14ef247d53ed243e4aceb15f39 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3767535 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>
Chris Dalton c460c299 2022-06-21T11:20:45 Implement GLSL additions for ANGLE_shader_pixel_local_storage Specs out, implements, and thoroughly tests the GLSL additions for ANGLE_shader_pixel_local_storage. Adds a simple transformation that rewrites PLS directly into shader images. Updates the existing PLS tests to use the newly built-in PLS features and ensures they continue passing. For now, applications call glBindImageTexture to configure their pixel local storage. The OpenGL ES API side of this extension will follow shortly. Bug: angleproject:7279 Change-Id: I141183069b5cbfcca01cbb77b5b36d3e5f834bf5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3761876 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app> Reviewed-by: Kenneth Russell <kbr@chromium.org>
Chris Dalton 15cc0013 2022-07-14T23:32:05 Add a GL_ANGLE_shader_pixel_local_storage extension Plumbs through "GL_ANGLE_shader_pixel_local_storage" and "GL_ANGLE_shader_pixel_local_storage_coherent" extension strings advertised by ANGLE and stubs out an initial spec document. This change doesn't add any new procedures or shader constructs, but it does allow the PLS tests to start checking for the real extension strings and requiring the GL_ANGLE_shader_pixel_local_storage extension. Bug: angleproject:7279 Change-Id: I36877fe4117185a2121f803288123cd69a447cf3 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3739590 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Kenneth Russell <kbr@chromium.org> Commit-Queue: Chris Dalton <chris@rive.app>