archlinuxarm · MastaG · Jan 18, 2023
diff --git a/extra/webkit2gtk-5.0/0001-ARM-NEON-FELightningNEON.cpp-fails-to-build-NEON-fas.patch b/extra/webkit2gtk-5.0/0001-ARM-NEON-FELightningNEON.cpp-fails-to-build-NEON-fas.patch
@@ -0,0 +1,311 @@
+From 0d3344e17d258106617b0e6d783d073b188a2548 Mon Sep 17 00:00:00 2001
+From: Adrian Perez de Castro <[email protected]>
+Date: Thu, 2 Jun 2022 11:19:06 +0300
+Subject: [PATCH] [ARM][NEON] FELightningNEON.cpp fails to build, NEON fast
+ path seems unused https://bugs.webkit.org/show_bug.cgi?id=241182
+
+Reviewed by NOBODY (OOPS!).
+
+Move the NEON fast path for the SVG lighting filter effects into
+FELightingSoftwareApplier, and arrange to actually use them by
+forwarding calls to applyPlatformGeneric() into applyPlatformNeon().
+
+Some changes were needed to adapt platformApplyNeon() to the current
+state of filters after r286140. This was not detected because the code
+bitrotted due to it being guarded with CPU(ARM_TRADITIONAL), which does
+not get used much these days: CPU(ARM_THUMB2) is more common. It should
+be possible to use the NEON fast paths also in Thumb mode, but that is
+left for a follow-up fix.
+
+* Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.cpp:
+(WebCore::FELightingSoftwareApplier::platformApplyNeonWorker):
+(WebCore::FELightingSoftwareApplier::getPowerCoefficients):
+(WebCore::FELighting::platformApplyNeonWorker): Deleted.
+(WebCore::FELighting::getPowerCoefficients): Deleted.
+* Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.h:
+(WebCore::FELightingSoftwareApplier::applyPlatformNeon):
+(WebCore::FELighting::platformApplyNeon): Deleted.
+* Source/WebCore/platform/graphics/filters/DistantLightSource.h:
+* Source/WebCore/platform/graphics/filters/FELighting.h:
+* Source/WebCore/platform/graphics/filters/PointLightSource.h:
+* Source/WebCore/platform/graphics/filters/SpotLightSource.h:
+* Source/WebCore/platform/graphics/filters/software/FELightingSoftwareApplier.h:
+---
+Upstream-Status: Submitted [https://github.com/WebKit/WebKit/pull/1233]
+Signed-off-by: Khem Raj <[email protected]>
+
+ .../cpu/arm/filters/FELightingNEON.cpp        |  4 +-
+ .../graphics/cpu/arm/filters/FELightingNEON.h | 54 +++++++++----------
+ .../graphics/filters/DistantLightSource.h     |  4 ++
+ .../platform/graphics/filters/FELighting.h    |  7 ---
+ .../graphics/filters/PointLightSource.h       |  4 ++
+ .../graphics/filters/SpotLightSource.h        |  4 ++
+ .../software/FELightingSoftwareApplier.h      | 16 ++++++
+ 7 files changed, 57 insertions(+), 36 deletions(-)
+
+diff --git a/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.cpp b/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.cpp
+index f6ff8c20a5a8..42a97ffc5372 100644
+--- a/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.cpp
++++ b/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.cpp
+@@ -49,7 +49,7 @@ short* feLightingConstantsForNeon()
+     return s_FELightingConstantsForNeon;
+ }
+
+-void FELighting::platformApplyNeonWorker(FELightingPaintingDataForNeon* parameters)
++void FELightingSoftwareApplier::platformApplyNeonWorker(FELightingPaintingDataForNeon* parameters)
+ {
+     neonDrawLighting(parameters);
+ }
+@@ -464,7 +464,7 @@ TOSTRING(neonDrawLighting) ":" NL
+     "b .lightStrengthCalculated" NL
+ ); // NOLINT
+
+-int FELighting::getPowerCoefficients(float exponent)
++int FELightingSoftwareApplier::getPowerCoefficients(float exponent)
+ {
+     // Calling a powf function from the assembly code would require to save
+     // and reload a lot of NEON registers. Since the base is in range [0..1]
+diff --git a/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.h b/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.h
+index b17c603d40d3..c6d17f573eca 100644
+--- a/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.h
++++ b/Source/WebCore/platform/graphics/cpu/arm/filters/FELightingNEON.h
+@@ -24,14 +24,15 @@
+  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+  */
+
+-#ifndef FELightingNEON_h
+-#define FELightingNEON_h
++#pragma once
+
+ #if CPU(ARM_NEON) && CPU(ARM_TRADITIONAL) && COMPILER(GCC_COMPATIBLE)
+
+-#include "FELighting.h"
++#include "FELightingSoftwareApplier.h"
++#include "ImageBuffer.h"
+ #include "PointLightSource.h"
+ #include "SpotLightSource.h"
++#include <wtf/ObjectIdentifier.h>
+ #include <wtf/ParallelJobs.h>
+
+ namespace WebCore {
+@@ -93,14 +94,14 @@ extern "C" {
+ void neonDrawLighting(FELightingPaintingDataForNeon*);
+ }
+
+-inline void FELighting::platformApplyNeon(const LightingData& data, const LightSource::PaintingData& paintingData)
++inline void FELightingSoftwareApplier::applyPlatformNeon(const FELightingSoftwareApplier::LightingData& data, const LightSource::PaintingData& paintingData)
+ {
+-    alignas(16) FELightingFloatArgumentsForNeon floatArguments;
+-    FELightingPaintingDataForNeon neonData = {
+-        data.pixels->data(),
++    WebCore::FELightingFloatArgumentsForNeon alignas(16) floatArguments;
++    WebCore::FELightingPaintingDataForNeon neonData = {
++        data.pixels->bytes(),
+         1,
+-        data.widthDecreasedByOne - 1,
+-        data.heightDecreasedByOne - 1,
++        data.width - 2,
++        data.height - 2,
+         0,
+         0,
+         0,
+@@ -111,23 +112,23 @@ inline void FELighting::platformApplyNeon(const LightingData& data, const LightS
+     // Set light source arguments.
+     floatArguments.constOne = 1;
+
+-    auto color = m_lightingColor.toColorTypeLossy<SRGBA<uint8_t>>().resolved();
++    auto color = data.lightingColor.toColorTypeLossy<SRGBA<uint8_t>>().resolved();
+
+     floatArguments.colorRed = color.red;
+     floatArguments.colorGreen = color.green;
+     floatArguments.colorBlue = color.blue;
+     floatArguments.padding4 = 0;
+
+-    if (m_lightSource->type() == LS_POINT) {
++    if (data.lightSource->type() == LS_POINT) {
+         neonData.flags |= FLAG_POINT_LIGHT;
+-        PointLightSource& pointLightSource = static_cast<PointLightSource&>(m_lightSource.get());
++        const auto& pointLightSource = *static_cast<const PointLightSource*>(data.lightSource);
+         floatArguments.lightX = pointLightSource.position().x();
+         floatArguments.lightY = pointLightSource.position().y();
+         floatArguments.lightZ = pointLightSource.position().z();
+         floatArguments.padding2 = 0;
+-    } else if (m_lightSource->type() == LS_SPOT) {
++    } else if (data.lightSource->type() == LS_SPOT) {
+         neonData.flags |= FLAG_SPOT_LIGHT;
+-        SpotLightSource& spotLightSource = static_cast<SpotLightSource&>(m_lightSource.get());
++        const auto& spotLightSource = *static_cast<const SpotLightSource*>(data.lightSource);
+         floatArguments.lightX = spotLightSource.position().x();
+         floatArguments.lightY = spotLightSource.position().y();
+         floatArguments.lightZ = spotLightSource.position().z();
+@@ -145,7 +146,7 @@ inline void FELighting::platformApplyNeon(const LightingData& data, const LightS
+         if (spotLightSource.specularExponent() == 1)
+             neonData.flags |= FLAG_CONE_EXPONENT_IS_1;
+     } else {
+-        ASSERT(m_lightSource->type() == LS_DISTANT);
++        ASSERT(data.lightSource->type() == LS_DISTANT);
+         floatArguments.lightX = paintingData.initialLightingData.lightVector.x();
+         floatArguments.lightY = paintingData.initialLightingData.lightVector.y();
+         floatArguments.lightZ = paintingData.initialLightingData.lightVector.z();
+@@ -155,38 +156,39 @@ inline void FELighting::platformApplyNeon(const LightingData& data, const LightS
+     // Set lighting arguments.
+     floatArguments.surfaceScale = data.surfaceScale;
+     floatArguments.minusSurfaceScaleDividedByFour = -data.surfaceScale / 4;
+-    if (m_lightingType == FELighting::DiffuseLighting)
+-        floatArguments.diffuseConstant = m_diffuseConstant;
++    if (data.filterType == FilterEffect::Type::FEDiffuseLighting)
++        floatArguments.diffuseConstant = data.diffuseConstant;
+     else {
+         neonData.flags |= FLAG_SPECULAR_LIGHT;
+-        floatArguments.diffuseConstant = m_specularConstant;
+-        neonData.specularExponent = getPowerCoefficients(m_specularExponent);
+-        if (m_specularExponent == 1)
++        floatArguments.diffuseConstant = data.specularConstant;
++        neonData.specularExponent = getPowerCoefficients(data.specularExponent);
++        if (data.specularExponent == 1)
+             neonData.flags |= FLAG_SPECULAR_EXPONENT_IS_1;
+     }
+     if (floatArguments.diffuseConstant == 1)
+         neonData.flags |= FLAG_DIFFUSE_CONST_IS_1;
+
+-    int optimalThreadNumber = ((data.widthDecreasedByOne - 1) * (data.heightDecreasedByOne - 1)) / s_minimalRectDimension;
++    static constexpr int minimalRectDimension = 100 * 100; // Empirical data limit for parallel jobs
++    int optimalThreadNumber = ((data.width - 2) * (data.height - 2)) / minimalRectDimension;
+     if (optimalThreadNumber > 1) {
+         // Initialize parallel jobs
+-        ParallelJobs<FELightingPaintingDataForNeon> parallelJobs(&WebCore::FELighting::platformApplyNeonWorker, optimalThreadNumber);
++        ParallelJobs<FELightingPaintingDataForNeon> parallelJobs(&FELightingSoftwareApplier::platformApplyNeonWorker, optimalThreadNumber);
+
+         // Fill the parameter array
+         int job = parallelJobs.numberOfJobs();
+         if (job > 1) {
+             int yStart = 1;
+-            int yStep = (data.heightDecreasedByOne - 1) / job;
++            int yStep = (data.height - 2) / job;
+             for (--job; job >= 0; --job) {
+                 FELightingPaintingDataForNeon& params = parallelJobs.parameter(job);
+                 params = neonData;
+                 params.yStart = yStart;
+-                params.pixels += (yStart - 1) * (data.widthDecreasedByOne + 1) * 4;
++                params.pixels += (yStart - 1) * data.width * 4;
+                 if (job > 0) {
+                     params.absoluteHeight = yStep;
+                     yStart += yStep;
+                 } else
+-                    params.absoluteHeight = data.heightDecreasedByOne - yStart;
++                    params.absoluteHeight = (data.height - 1) - yStart;
+             }
+             parallelJobs.execute();
+             return;
+@@ -199,5 +201,3 @@ inline void FELighting::platformApplyNeon(const LightingData& data, const LightS
+ } // namespace WebCore
+
+ #endif // CPU(ARM_NEON) && COMPILER(GCC_COMPATIBLE)
+-
+-#endif // FELightingNEON_h
+diff --git a/Source/WebCore/platform/graphics/filters/DistantLightSource.h b/Source/WebCore/platform/graphics/filters/DistantLightSource.h
+index 0660143fc1cf..2b1e86d99fa4 100644
+--- a/Source/WebCore/platform/graphics/filters/DistantLightSource.h
++++ b/Source/WebCore/platform/graphics/filters/DistantLightSource.h
+@@ -25,6 +25,10 @@
+ #include "LightSource.h"
+ #include <wtf/Ref.h>
+
++namespace WTF {
++class TextStream;
++} // namespace WTF
++
+ namespace WebCore {
+
+ class DistantLightSource : public LightSource {
+diff --git a/Source/WebCore/platform/graphics/filters/FELighting.h b/Source/WebCore/platform/graphics/filters/FELighting.h
+index 0c073bc13f8c..e0db00545c17 100644
+--- a/Source/WebCore/platform/graphics/filters/FELighting.h
++++ b/Source/WebCore/platform/graphics/filters/FELighting.h
+@@ -35,8 +35,6 @@
+
+ namespace WebCore {
+
+-struct FELightingPaintingDataForNeon;
+-
+ class FELighting : public FilterEffect {
+ public:
+     const Color& lightingColor() const { return m_lightingColor; }
+@@ -67,11 +65,6 @@ class FELighting : public FilterEffect {
+
+     std::unique_ptr<FilterEffectApplier> createSoftwareApplier() const override;
+
+-#if CPU(ARM_NEON) && CPU(ARM_TRADITIONAL) && COMPILER(GCC_COMPATIBLE)
+-    static int getPowerCoefficients(float exponent);
+-    inline void platformApplyNeon(const LightingData&, const LightSource::PaintingData&);
+-#endif
+-
+     Color m_lightingColor;
+     float m_surfaceScale;
+     float m_diffuseConstant;
+diff --git a/Source/WebCore/platform/graphics/filters/PointLightSource.h b/Source/WebCore/platform/graphics/filters/PointLightSource.h
+index 5c9c7fb783e6..e53aa012ac1c 100644
+--- a/Source/WebCore/platform/graphics/filters/PointLightSource.h
++++ b/Source/WebCore/platform/graphics/filters/PointLightSource.h
+@@ -26,6 +26,10 @@
+ #include "LightSource.h"
+ #include <wtf/Ref.h>
+
++namespace WTF {
++class TextStream;
++} // namespace WTF
++
+ namespace WebCore {
+
+ class PointLightSource : public LightSource {
+diff --git a/Source/WebCore/platform/graphics/filters/SpotLightSource.h b/Source/WebCore/platform/graphics/filters/SpotLightSource.h
+index 04e331ec4ec0..763c8d400b00 100644
+--- a/Source/WebCore/platform/graphics/filters/SpotLightSource.h
++++ b/Source/WebCore/platform/graphics/filters/SpotLightSource.h
+@@ -26,6 +26,10 @@
+ #include "LightSource.h"
+ #include <wtf/Ref.h>
+
++namespace WTF {
++class TextStream;
++} // namespace WTF
++
+ namespace WebCore {
+
+ class SpotLightSource : public LightSource {
+diff --git a/Source/WebCore/platform/graphics/filters/software/FELightingSoftwareApplier.h b/Source/WebCore/platform/graphics/filters/software/FELightingSoftwareApplier.h
+index c974d92115ff..e2896660cfbd 100644
+--- a/Source/WebCore/platform/graphics/filters/software/FELightingSoftwareApplier.h
++++ b/Source/WebCore/platform/graphics/filters/software/FELightingSoftwareApplier.h
+@@ -36,6 +36,7 @@
+ namespace WebCore {
+
+ class FELighting;
++struct FELightingPaintingDataForNeon;
+
+ class FELightingSoftwareApplier final : public FilterEffectConcreteApplier<FELighting> {
+     WTF_MAKE_FAST_ALLOCATED;
+@@ -132,8 +133,23 @@ class FELightingSoftwareApplier final : public FilterEffectConcreteApplier<FELig
+
+     static void applyPlatformGenericPaint(const LightingData&, const LightSource::PaintingData&, int startY, int endY);
+     static void applyPlatformGenericWorker(ApplyParameters*);
++
++#if CPU(ARM_NEON) && CPU(ARM_TRADITIONAL) && COMPILER(GCC_COMPATIBLE)
++    static int getPowerCoefficients(float exponent);
++    static void platformApplyNeonWorker(FELightingPaintingDataForNeon*);
++    inline static void applyPlatformNeon(const LightingData&, const LightSource::PaintingData&);
++
++    inline static void applyPlatformGeneric(const LightingData& data, const LightSource::PaintingData& paintingData)
++    {
++        applyPlatformNeon(data, paintingData);
++    }
++#else
+     static void applyPlatformGeneric(const LightingData&, const LightSource::PaintingData&);
++#endif
++
+     static void applyPlatform(const LightingData&);
+ };
+
+ } // namespace WebCore
++
++#include "FELightingNEON.h"
diff --git a/extra/webkit2gtk-5.0/PKGBUILD b/extra/webkit2gtk-5.0/PKGBUILD
@@ -73,24 +73,30 @@ makedepends=(
   systemd
   wayland-protocols
 )
-options=(debug)
-source=($url/releases/webkitgtk-$pkgver.tar.xz{,.asc})
+source=($url/releases/webkitgtk-$pkgver.tar.xz{,.asc}
+        "0001-ARM-NEON-FELightningNEON.cpp-fails-to-build-NEON-fas.patch")
 sha256sums=('41f001d1ed448c6936b394a9f20e4640eebf83a7f08262df28504f7410604a5a'
-            'SKIP')
+            'SKIP'
+            'eaa7eb7f60f497872a419ecf1ae397b9f8e986ff42fd78c8b2c8243d886f5767')
 validpgpkeys=('D7FCF61CF9A2DEAB31D81BD3F3D322D0EC4582C3'  # Carlos Garcia Campos <[email protected]>
               '5AA3BC334FD7E3369E7C77B291C559DBE4C9123B') # Adrián Pérez de Castro <[email protected]>
 
 prepare() {
   cd webkitgtk-$pkgver
+  # Building for ARM fails: https://github.com/flatpak/xdg-desktop-portal/issues/952
+  git apply ../0001-ARM-NEON-FELightningNEON.cpp-fails-to-build-NEON-fas.patch
 }
 
 build() {
   # Produce minimal debug info: 4.3 GB of debug data makes the
   # build too slow and is too much to package for debuginfod
   CFLAGS+=' -g1'
   CXXFLAGS+=' -g1'
-
-  [[ $CARCH == "armv7h" ]] && CFLAGS=`echo $CFLAGS | sed -e 's/neon/vfpv3/'` && CXXFLAGS="$CFLAGS"
+  # Disable neon simd on armv7h devices, even with the above patch, it still fails to link (see github issue).
+  if [ "${arch}" == "armv7h" ]; then
+    CFLAGS+=' -mfpu=vfpv3-d16'
+    CXXFLAGS+=' -mfpu=vfpv3-d16'
+  fi
 
   cmake -S webkitgtk-$pkgver -B build -G Ninja \
     -DPORT=GTK \
@@ -103,6 +109,7 @@ build() {
     -DUSE_GTK4=ON \
     -DENABLE_DOCUMENTATION=ON \
     -DENABLE_MINIBROWSER=ON
+  # ARMv7 devices dont have much memory, so you might want to add "-j 1" here:
   cmake --build build
 }