dev-qt/qtgui: Fix wrong to linear conversion

QTBUG: https://bugreports.qt.io/browse/QTBUG-109169

Signed-off-by: Andreas Sturmlechner <[email protected]>

dev-qt/qtgui/files/qtgui-5.15.7-fix-wrong-to-linear-conversion.patch

@@ -0,0 +1,47 @@
+From a9e67318e6a8924c4b5461656bcc6a80720ae899 Mon Sep 17 00:00:00 2001
+From: Allan Sandfeld Jensen <[email protected]>
+Date: Tue, 6 Dec 2022 10:42:59 +0100
+Subject: [PATCH] Fix wrong to linear conversion
+
+Causing bad rendering of gamma corrected text on non-standard image
+format paint devices.
+
+Pick-to: 6.4 6.2 5.15
+Fixes: QTBUG-109169
+Change-Id: I6d95e9a42b9ccac609071123dd4535d25e225a29
+Reviewed-by: Fabian Vogt <[email protected]>
+Reviewed-by: Eirik Aavitsland <[email protected]>
+(cherry picked from commit a09c33e1f7b5999a16bce9dd23ef8ca33d519210)
+---
+ src/gui/painting/qcolortrclut_p.h | 1 +
+ src/gui/painting/qdrawhelper.cpp  | 2 +-
+ 2 files changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/gui/painting/qcolortrclut_p.h b/src/gui/painting/qcolortrclut_p.h
+index 76a6a60803..24fd522e6c 100644
+--- a/src/gui/painting/qcolortrclut_p.h
++++ b/src/gui/painting/qcolortrclut_p.h
+@@ -118,6 +118,7 @@ public:
+         return QRgba64::fromRgba64(r, g, b, qAlpha(rgb32) * 257);
+ #endif
+     }
++    QRgba64 toLinear64(QRgba64) const = delete;
+
+     QRgb toLinear(QRgb rgb32) const
+     {
+diff --git a/src/gui/painting/qdrawhelper.cpp b/src/gui/painting/qdrawhelper.cpp
+index a61793508a..5ba2d277b7 100644
+--- a/src/gui/painting/qdrawhelper.cpp
++++ b/src/gui/painting/qdrawhelper.cpp
+@@ -6091,7 +6091,7 @@ static inline void alphargbblend_argb32(quint32 *dst, uint coverage, const QRgba
+ static inline void rgbBlendPixel(QRgba64 &dst, int coverage, QRgba64 slinear, const QColorTrcLut *colorProfile)
+ {
+     // Do a gammacorrected RGB alphablend...
+-    const QRgba64 dlinear = colorProfile ? colorProfile->toLinear64(dst) : dst;
++    const QRgba64 dlinear = colorProfile ? colorProfile->toLinear(dst) : dst;
+
+     QRgba64 blend = rgbBlend(dlinear, slinear, coverage);
+
+-- 
+2.38.1
+

dev-qt/qtgui/qtgui-5.15.7-r1.ebuild

@@ -0,0 +1,186 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+if [[ ${PV} != *9999* ]]; then
+	QT5_KDEPATCHSET_REV=1
+	KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~loong ~ppc ~ppc64 ~riscv ~sparc ~x86"
+fi
+
+QT5_MODULE="qtbase"
+inherit qt5-build
+
+DESCRIPTION="The GUI module and platform plugins for the Qt5 framework"
+
+SLOT=5/${QT5_PV} # bug 707658
+IUSE="accessibility dbus egl eglfs evdev gles2-only ibus jpeg +libinput
+	linuxfb +png tslib tuio +udev vnc vulkan wayland +X"
+REQUIRED_USE="
+	|| ( eglfs linuxfb vnc X )
+	accessibility? ( dbus X )
+	eglfs? ( egl )
+	ibus? ( dbus )
+	libinput? ( udev )
+	X? ( gles2-only? ( egl ) )
+"
+
+RDEPEND="
+	dev-libs/glib:2
+	=dev-qt/qtcore-${QT5_PV}*:5=
+	dev-util/gtk-update-icon-cache
+	media-libs/fontconfig
+	media-libs/freetype:2
+	media-libs/harfbuzz:=
+	sys-libs/zlib:=
+	dbus? ( =dev-qt/qtdbus-${QT5_PV}* )
+	eglfs? (
+		media-libs/mesa[gbm(+)]
+		x11-libs/libdrm
+	)
+	evdev? ( sys-libs/mtdev )
+	jpeg? ( media-libs/libjpeg-turbo:= )
+	gles2-only? ( media-libs/libglvnd )
+	!gles2-only? ( media-libs/libglvnd[X] )
+	libinput? (
+		dev-libs/libinput:=
+		x11-libs/libxkbcommon
+	)
+	png? ( media-libs/libpng:= )
+	tslib? ( >=x11-libs/tslib-1.21 )
+	tuio? ( =dev-qt/qtnetwork-${QT5_PV}* )
+	udev? ( virtual/libudev:= )
+	vnc? ( =dev-qt/qtnetwork-${QT5_PV}* )
+	vulkan? ( dev-util/vulkan-headers )
+	X? (
+		x11-libs/libICE
+		x11-libs/libSM
+		x11-libs/libX11
+		x11-libs/libxcb:=
+		x11-libs/libxkbcommon[X]
+		x11-libs/xcb-util-image
+		x11-libs/xcb-util-keysyms
+		x11-libs/xcb-util-renderutil
+		x11-libs/xcb-util-wm
+	)
+"
+DEPEND="${RDEPEND}
+	evdev? ( sys-kernel/linux-headers )
+	linuxfb? ( sys-kernel/linux-headers )
+	udev? ( sys-kernel/linux-headers )
+"
+PDEPEND="
+	ibus? ( app-i18n/ibus )
+	wayland? ( =dev-qt/qtwayland-${QT5_PV}* )
+"
+
+QT5_TARGET_SUBDIRS=(
+	src/tools/qvkgen
+	src/gui
+	src/openglextensions
+	src/platformheaders
+	src/platformsupport
+	src/plugins/generic
+	src/plugins/imageformats
+	src/plugins/platforms
+	src/plugins/platforminputcontexts
+)
+
+QT5_GENTOO_CONFIG=(
+	accessibility:accessibility-atspi-bridge
+	egl:egl:
+	eglfs:eglfs:
+	eglfs:eglfs_egldevice:
+	eglfs:eglfs_gbm:
+	evdev:evdev:
+	evdev:mtdev:
+	:fontconfig:
+	:system-freetype:FREETYPE
+	!:no-freetype:
+	gles2-only::OPENGL_ES
+	gles2-only:opengles2:OPENGL_ES_2
+	!:no-gui:
+	:system-harfbuzz:
+	!:no-harfbuzz:
+	jpeg:system-jpeg:IMAGEFORMAT_JPEG
+	!jpeg:no-jpeg:
+	libinput
+	libinput:xkbcommon:
+	:opengl
+	png:png:
+	png:system-png:IMAGEFORMAT_PNG
+	!png:no-png:
+	tslib:tslib:
+	udev:libudev:
+	vulkan:vulkan:
+	X:xcb:
+	X:xcb-glx:
+	X:xcb-plugin:
+	X:xcb-render:
+	X:xcb-sm:
+	X:xcb-xlib:
+	X:xcb-xinput:
+)
+
+QT5_GENTOO_PRIVATE_CONFIG=(
+	:gui
+)
+
+PATCHES=(
+	"${FILESDIR}/${P}-fix-wrong-to-linear-conversion.patch" # kde/5.15
+	# Approved but pending rebase:
+	# https://invent.kde.org/qt/qt/qtbase/-/merge_requests/211
+	"${FILESDIR}/${P}-xcb-correctly-disconnect-xsettings-callbacks.patch"
+	# Downstream workaround the fact that QT_CONFIG(dbus) does not work for us:
+	"${FILESDIR}/${P}-fix-no-dbus.patch"
+)
+
+src_prepare() {
+	# don't add -O3 to CXXFLAGS, bug 549140
+	sed -i -e '/CONFIG\s*+=/s/optimize_full//' src/gui/gui.pro || die
+
+	# egl_x11 is activated when both egl and X are enabled
+	use egl && QT5_GENTOO_CONFIG+=(X:egl_x11:) || QT5_GENTOO_CONFIG+=(egl:egl_x11:)
+
+	qt_use_disable_config dbus dbus \
+		src/platformsupport/themes/genericunix/genericunix.pri
+
+	qt_use_disable_config tuio tuiotouch src/plugins/generic/generic.pro
+
+	qt_use_disable_mod ibus dbus \
+		src/plugins/platforminputcontexts/platforminputcontexts.pro
+
+	use vnc || sed -i -e '/SUBDIRS += vnc/d' \
+		src/plugins/platforms/platforms.pro || die
+
+	qt5-build_src_prepare
+}
+
+src_configure() {
+	local myconf=(
+		$(usev dbus -dbus-linked)
+		$(qt_use egl)
+		$(qt_use eglfs)
+		$(usev eglfs '-gbm -kms')
+		$(qt_use evdev)
+		$(qt_use evdev mtdev)
+		-fontconfig
+		-system-freetype
+		-gui
+		-system-harfbuzz
+		$(qt_use jpeg libjpeg system)
+		$(qt_use libinput)
+		$(qt_use linuxfb)
+		-opengl $(usex gles2-only es2 desktop)
+		$(qt_use png libpng system)
+		$(qt_use tslib)
+		$(qt_use udev libudev)
+		$(qt_use vulkan)
+		$(qt_use X xcb)
+		$(usev X '-xcb-xlib')
+	)
+	if use libinput || use X; then
+		myconf+=( -xkbcommon )
+	fi
+	qt5-build_src_configure
+}