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.

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 :)