Patches the libQtGui.so.4 library to ignore system themes and thus fixes akward theme issues with the Gowin FPGA IDE on Linux.

gowin-ide-fix-theme.sh

#!/usr/bin/env bash

#
# Copyright (C) 2023 Patrick Pedersen
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.
# 

# Usage:
# 	bash gowin-ide-fix-theme.sh <path to Gowin IDE installation>
# Example:
# 	bash gowin-ide-fix-theme.sh ~/Gowin_V1.9.8.09_Education_linux/

# Dependencies:
# 	curl
# 	bspatch

# This script modifies the libQtGui.so.4 library to allow the use of an application-specific theme configuration 
# located in the directory of the executable called `gowin_qt4.conf`, instead of the user theme provided by 
# `~/.config/Trolltech.conf`. This resolves awkward theme issues with the Gowin FPGA IDE on Linux.
# The script has been successfully tested on "Gowin V1.9.8.09 Education Edition" on Ubuntu 22.04 and 20.04.

# The patch works by replacing the `Trolltech` string in [this line](https://github.com/openwebos/qt/blob/master/src/gui/kernel/qapplication_x11.cpp#L864)
# with `gowin_qt4`, thus forcing it to look for `gowin_qt4.conf` instead. This configuration file may then be 
# provided in the local directory of the `gwe_ide` executable, or in the `~/.config/` folder.
# Since this patch only affects the local libQtGui.so.4 library, it does not affect any other Qt-4 applications.

# Before patching, the script makes a backup of the original libQtGui.so.4 file in the lib/ directory of the Gowin IDE installation.

GOWIN_PATH=$(readlink -m $1)
GOWIN_IDE_BIN=$GOWIN_PATH/IDE/bin
GOWIN_IDE_LIBS=$GOWIN_PATH/IDE/lib
LIB_MD5_MATCH="290d04c582a04ac045561b24544d2e25  libQtGui.so.4"
PATCH_GIST="https://gist.githubusercontent.com/CTXz/23042d54f8899a5271a0761aba3d898f/raw/4dc33b666cb94e5767695a5d48a35ea5caea08ce/gowin-ide-libQtGui-custom-conf.patch.hex"
QT_CONF_GIST="https://gist.githubusercontent.com/CTXz/210cc65cd33992f2c38c35df4ad5c781/raw/b50294be909ba57e5f8305de873edc95a98f7669/gowin_qt4.conf"

if [ -z "$GOWIN_PATH" ]; then
	echo "Usage: bash gowin-ide-fix-theme.sh <path to Gowin IDE installation>"
	exit 1
fi

if [ ! -d "$GOWIN_PATH" ]; then
	echo "Error: $GOWIN_PATH is not a directory"
	exit 1
fi

which bspatch > /dev/null 2>&1
if [ $? -ne 0 ]; then
	echo "Error: bspatch not found. Please install bspatch."
	exit 1
fi

curl --help > /dev/null 2>&1
if [ $? -ne 0 ]; then
	echo "Error: curl not found. Please install curl."
	exit 1
fi

cd $GOWIN_IDE_LIBS
echo "$LIB_MD5_MATCH" | md5sum -c --status

if [ $? -eq 0 ]; then
	echo "libQtGui.so.4 already patched! Skipping..."
else
	cd $GOWIN_IDE_LIBS
	curl "$PATCH_GIST" | xxd -r > gowin-ide-libQtGui-custom-conf.patch

	if [ $? -ne 0 ]; then
		echo "Error: Failed to download patch file."
		exit 1
	fi

	mv libQtGui.so.4 libQtGui.so.4.bak && bspatch libQtGui.so.4.bak libQtGui.so.4 gowin-ide-libQtGui-custom-conf.patch

	if [ $? -ne 0 ]; then
		echo "Error: Failed to patch libQtGui.so.4"
		exit 1
	fi

	echo
	echo "Patch applied! A backup of the original libQtGui.so.4 file can be found at $GOWIN_IDE_LIBS/libQtGui.so.4.bak"
	echo
	echo "If you want to revert the patch, simply run the following command:"
	echo -e "\tmv $GOWIN_IDE_LIBS/libQtGui.so.4.bak $GOWIN_IDE_LIBS/libQtGui.so.4"
	echo
fi

echo "Downloading recommended gowin_qt4.conf configuration to $GOWIN_IDE_BIN/gowin_qt4.conf"
if [ -f "$GOWIN_IDE_BIN/gowin_qt4.conf" ]; then
	echo "Configuration already exists in $GOWIN_IDE_BIN. Skipping..."
else
	curl "$QT_CONF_GIST" > $GOWIN_IDE_BIN/gowin_qt4.conf

	if [ $? -ne 0 ]; then
		echo "Error: Failed to download gowin_qt4.conf configuration file."
		exit 1
	fi
fi

echo "Done!"

Thanks for this script! the ide is super annoying with the drak theme.

Thank you! Glad to hear I'm not the only one annoyed by this issue :)