[Impeller] Use 32 bit for positional stuff in the rrect blur #42797

bdero · 2023-06-13T01:48:48Z

16 bit floats aren't precise enough for positional computations, like computing SDFs in the case of the RRect blur.

Unfortunately, I haven't been able to repro this particular glitch in a playground -- it seems to be iOS-specific. In macOS desktop frame captures the problem seems to go away.

Before:

After:

bdero · 2023-06-13T02:00:10Z

This does also resolve an issue that would cause the blur to get screwed up and disappear as the blur nears 256, which was already resolved in the regular 2-pass blur. I can add a playground to catch that.

jonahwilliams · 2023-06-13T02:47:43Z

impeller/entity/shaders/rrect_blur.frag

-  f16vec2 rect_size;
-  float16_t blur_sigma;
-  float16_t corner_radius;
+  vec2 rect_size;


here and elsewhere, mark these as highp so the issue is fixed for Vulkan too.

err, not elsewhere, but like, in the declaration.

jonahwilliams

LGTM with nit

bdero · 2023-06-14T20:04:42Z

Mali json step is failing with no useful output, unfortunately. I'm assuming it doesn't like something syntactically. :/

FAILED: gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-G78.json
vpython3 ../../build/gn_run_binary.py ../../../../arm-tools/mali_offline_compiler/malioc --format json --fragment --core Mali-G78 --output /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-G78.json /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/flutter/impeller/entity/gles/rrect_blur.frag.gles

This reverts commit a6c0488.

bdero · 2023-06-18T04:54:04Z

malioc is seeing an undeclared variable, which is quite strange.

FAILED: gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-G78.json 
vpython3 ../../build/gn_run_malioc.py ../../../../arm-tools/mali_offline_compiler/malioc /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-G78.json --format json --fragment --core Mali-G78 /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/flutter/impeller/entity/gles/rrect_blur.frag.gles

malioc output:
{
  "producer": {
    "build": "aeadf0",
    "documentation": "https://developer.arm.com/tools-and-software/graphics-and-gaming/arm-mobile-studio/learn/mali-offline-compiler-documentation",
    "name": "Mali Offline Compiler",
    "version": [
      7,
      8,
      0
    ]
  },
  "schema": {
    "name": "error",
    "version": 0
  },
  "shaders": [
    {
      "driver": "r41p0-00rel0",
      "errors": [
        "0:60: L0002: Undeclared variable 'mp_copy_463_1_1'"
      ],
      "filename": "/b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/flutter/impeller/entity/gles/rrect_blur.frag.gles",
      "hardware": {
        "architecture": "Valhall",
        "core": "Mali-G78",
        "revision": "r1p1"
      },
      "shader": {
        "api": "OpenGL ES",
        "type": "Fragment"
      },
      "warnings": []
    }
  ]
}
[4737/5560] ACTION //flutter/impeller/entity:analyze_gles_entity_shaders_rrect_blur.frag_Mali-T880_malioc(//build/toolchain/android:clang_arm)
FAILED: gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-T880.json 
vpython3 ../../build/gn_run_malioc.py ../../../../arm-tools/mali_offline_compiler/malioc /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/malioc/flutter/impeller/entity/rrect_blur.frag.gles.Mali-T880.json --format json --fragment --core Mali-T880 /b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/flutter/impeller/entity/gles/rrect_blur.frag.gles

malioc output:
{
  "producer": {
    "build": "aeadf0",
    "documentation": "https://developer.arm.com/tools-and-software/graphics-and-gaming/arm-mobile-studio/learn/mali-offline-compiler-documentation",
    "name": "Mali Offline Compiler",
    "version": [
      7,
      8,
      0
    ]
  },
  "schema": {
    "name": "error",
    "version": 0
  },
  "shaders": [
    {
      "driver": "r23p0-00rel0",
      "errors": [
        "0:60: L0002: Undeclared variable 'mp_copy_463_1_1'"
      ],
      "filename": "/b/s/w/ir/cache/builder/src/out/android_debug_unopt/gen/flutter/impeller/entity/gles/rrect_blur.frag.gles",
      "hardware": {
        "architecture": "Midgard",
        "core": "Mali-T880",
        "revision": "r2p0"
      },
      "shader": {
        "api": "OpenGL ES",
        "type": "Fragment"
      },
      "warnings": []
    }
  ]
}

bdero · 2023-06-18T05:56:56Z

I'm going to land this without the highp change for now and defer investigating the malioc Android GLES shader issues. For now, this fixes the bug in iOS. I unfortunately also had trouble creating a working repro case for a CI golden...

I'd also like to get to a point where shader authors are not forced to contend with 3 different type resolution behaviors; Metal and Vulkan can be combined once we add support for 16 bit uniform buffer access to the Vulkan backend.
(I started pulling on this thread in #42818)

flutter/engine#42797)

…129092) flutter/engine@7ffa135...d298f0b 2023-06-18 [email protected] Fix prefer_final_in_foreach analysis errors (flutter/engine#42971) 2023-06-18 [email protected] Roll Fuchsia Linux SDK from xS5RzQLfpMEK1rNEd... to fgS2avQGq4x_sbZHU... (flutter/engine#42973) 2023-06-18 [email protected] Roll Fuchsia Mac SDK from aBEyk5N2HlwOqvpwo... to BuzniDS9u_hdghV5f... (flutter/engine#42970) 2023-06-18 [email protected] Roll Skia from dc2e0ebbd045 to f489be63a30a (1 revision) (flutter/engine#42968) 2023-06-18 [email protected] Roll Skia from 85b4788bc3f1 to dc2e0ebbd045 (1 revision) (flutter/engine#42967) 2023-06-18 [email protected] Roll Fuchsia Linux SDK from -PsA0LDB2FdS_4_vK... to xS5RzQLfpMEK1rNEd... (flutter/engine#42966) 2023-06-18 [email protected] [Impeller] Use 32 bit for positional stuff in the rrect blur (flutter/engine#42797) 2023-06-18 [email protected] Revert "[Impeller] correct default PSO pixel format and sample count." (flutter/engine#42962) 2023-06-18 [email protected] [Impeller] dont use concurrent runner to decode images on Android. (flutter/engine#42944) 2023-06-18 [email protected] Roll Fuchsia Mac SDK from I1G8Ll0KcxmAoMT8u... to aBEyk5N2HlwOqvpwo... (flutter/engine#42964) 2023-06-18 [email protected] Roll Skia from c56f38d79fe0 to 85b4788bc3f1 (2 revisions) (flutter/engine#42963) 2023-06-17 [email protected] Roll Fuchsia Linux SDK from Au1gd3XLMuSt1Z4oh... to -PsA0LDB2FdS_4_vK... (flutter/engine#42959) 2023-06-17 [email protected] Roll Dart SDK from d1faf69c8253 to 5a9e97eebbed (1 revision) (flutter/engine#42958) 2023-06-17 [email protected] Roll Skia from 2a9e11fd9d37 to c56f38d79fe0 (1 revision) (flutter/engine#42955) 2023-06-17 [email protected] Roll Fuchsia Mac SDK from JMStJe6efcLuWMT_I... to I1G8Ll0KcxmAoMT8u... (flutter/engine#42954) 2023-06-17 [email protected] Roll Dart SDK from 1a04f451a934 to d1faf69c8253 (1 revision) (flutter/engine#42953) 2023-06-17 [email protected] Roll Dart SDK from b3bcbdf7de8d to 1a04f451a934 (1 revision) (flutter/engine#42951) 2023-06-17 [email protected] Roll Skia from dc11c7ddb33f to 2a9e11fd9d37 (1 revision) (flutter/engine#42950) 2023-06-17 [email protected] [Impeller] Print malioc errors on CI (flutter/engine#42906) 2023-06-17 [email protected] Roll Dart SDK from 8eaed3382237 to b3bcbdf7de8d (10 revisions) (flutter/engine#42949) 2023-06-17 [email protected] Roll Fuchsia Linux SDK from -NW1eatBbmjvLaIcV... to Au1gd3XLMuSt1Z4oh... (flutter/engine#42948) 2023-06-17 [email protected] Fix analyzer warnings (prefer_final_in_for_each is now the default) (flutter/engine#42943) 2023-06-16 [email protected] Roll Fuchsia Mac SDK from fXVcR5tdj5wSd_OUz... to JMStJe6efcLuWMT_I... (flutter/engine#42942) 2023-06-16 [email protected] Roll Skia from 64fa632d3b01 to dc11c7ddb33f (3 revisions) (flutter/engine#42939) Also rolling transitive DEPS: fuchsia/sdk/core/linux-amd64 from -NW1eatBbmjv to fgS2avQGq4x_ fuchsia/sdk/core/mac-amd64 from fXVcR5tdj5wS to BuzniDS9u_hd If this roll has caused a breakage, revert this CL and stop the roller using the controls here: https://autoroll.skia.org/r/flutter-engine-flutter-autoroll Please CC [email protected],[email protected],[email protected] on the revert to ensure that a human is aware of the problem. To file a bug in Flutter: https://github.com/flutter/flutter/issues/new/choose To report a problem with the AutoRoller itself, please file a bug: https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug Documentation for the AutoRoller is here: https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

bdero added the e: impeller label Jun 13, 2023

bdero requested review from chinmaygarde and jonahwilliams June 13, 2023 01:48

bdero self-assigned this Jun 13, 2023

jonahwilliams reviewed Jun 13, 2023

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jonahwilliams approved these changes Jun 13, 2023

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bdero force-pushed the bdero/rrect32 branch from 403f6b8 to 267b878 Compare June 14, 2023 15:39

bdero force-pushed the bdero/rrect32 branch 2 times, most recently from 18a9d3e to 997c85c Compare June 15, 2023 23:31

bdero mentioned this pull request Jun 16, 2023

[Impeller] Malioc analysis build failed with no useful output flutter/flutter#128989

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bdero force-pushed the bdero/rrect32 branch 3 times, most recently from 53a69d4 to 687c06b Compare June 16, 2023 03:50

bdero added 3 commits June 17, 2023 21:46

[Impeller] Use 32 bit for positional stuff in the rrect blur

585ebdd

highp

a6c0488

Revert "highp"

6ac2ef4

This reverts commit a6c0488.

bdero force-pushed the bdero/rrect32 branch from 687c06b to 6ac2ef4 Compare June 18, 2023 04:47

bdero mentioned this pull request Jun 18, 2023

[Impeller] [iOS] PhysicalModel shadows are drawn with artifacts under circumstances flutter/flutter#128410

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bdero merged commit df4aa98 into flutter:main Jun 18, 2023

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Roll Flutter Engine from 7ffa1355f718 to ae2e9ec8bd54 (21 revisions) flutter/flutter#129081

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 18, 2023

df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

c703024

flutter/engine#42797)

engine-flutter-autoroll mentioned this pull request Jun 18, 2023

Roll Flutter Engine from 7ffa1355f718 to b41f9f7138c3 (22 revisions) flutter/flutter#129084

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 18, 2023

df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

e1bea13

flutter/engine#42797)

engine-flutter-autoroll mentioned this pull request Jun 18, 2023

Roll Flutter Engine from 7ffa1355f718 to b41f9f7138c3 (22 revisions) flutter/flutter#129087

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 18, 2023

df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

9738010

flutter/engine#42797)

engine-flutter-autoroll mentioned this pull request Jun 18, 2023

Roll Flutter Engine from 7ffa1355f718 to b41f9f7138c3 (22 revisions) flutter/flutter#129090

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 18, 2023

df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

b7c0093

flutter/engine#42797)

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Roll Flutter Engine from 7ffa1355f718 to a16dd8d8607b (23 revisions) flutter/flutter#129091

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df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

793e4f9

flutter/engine#42797)

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Roll Flutter Engine from 7ffa1355f718 to d298f0bf720c (24 revisions) flutter/flutter#129092

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engine-flutter-autoroll added a commit to engine-flutter-autoroll/flutter that referenced this pull request Jun 19, 2023

df4aa9858 [Impeller] Use 32 bit for positional stuff in the rrect blur (

751c766

flutter/engine#42797)

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