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[106.185.144.161]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-7f4c4ab52aasm3399933b3a.38.2025.12.11.15.23.09 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 11 Dec 2025 15:23:14 -0800 (PST) From: Bryan O'Donoghue To: libcamera-devel@lists.libcamera.org Cc: pavel@ucw.cz, Bryan O'Donoghue , Kieran Bingham , Milan Zamazal Subject: [PATCH v5 02/20] utils: gen-shader-headers: Add a utility to generate headers from shaders Date: Thu, 11 Dec 2025 23:22:27 +0000 Message-ID: <20251211232246.31330-3-bryan.odonoghue@linaro.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251211232246.31330-1-bryan.odonoghue@linaro.org> References: <20251211232246.31330-1-bryan.odonoghue@linaro.org> MIME-Version: 1.0 X-BeenThere: libcamera-devel@lists.libcamera.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: libcamera-devel-bounces@lists.libcamera.org Sender: "libcamera-devel" Two simple script to generate a header that contains GLSL shaders translated to C arrays. Acked-by: Kieran Bingham Reviewed-by: Milan Zamazal Signed-off-by: Bryan O'Donoghue --- utils/gen-shader-header.py | 37 +++++++++++++++++++++++++ utils/gen-shader-headers.sh | 55 +++++++++++++++++++++++++++++++++++++ 2 files changed, 92 insertions(+) create mode 100755 utils/gen-shader-header.py create mode 100755 utils/gen-shader-headers.sh diff --git a/utils/gen-shader-header.py b/utils/gen-shader-header.py new file mode 100755 index 000000000..745852b4c --- /dev/null +++ b/utils/gen-shader-header.py @@ -0,0 +1,37 @@ +#!/usr/bin/env python3 +# SPDX-License-Identifier: GPL-2.0-or-later +# Copyright (C) 2025, Bryan O'Donoghue. +# +# Author: Bryan O'Donoghue +# +# A Python script which takes a list of shader files and converts each of them +# into a C header. +# +import sys + +try: + with open(sys.argv[2], "rb") as file: + data = file.read() + data_len = len(data) + + name = sys.argv[1].replace(".", "_") + name_len = name + "_len" + + j = 0 + print("unsigned char const", name, "[] = {") + for ch in data: + print(f"0x{ch:02x}, ", end="") + j = (j + 1) % 16 + if j == 0: + print() + if j != 0: + print() + print("};") + + print() + print(f"const unsigned int {name_len}={data_len};") + +except FileNotFoundError: + print(f"File {sys.argv[2]} not found", file=sys.stderr) +except IOError: + print(f"Unable to read {sys.argv[2]}", file=sys.stderr) diff --git a/utils/gen-shader-headers.sh b/utils/gen-shader-headers.sh new file mode 100755 index 000000000..81bf1584c --- /dev/null +++ b/utils/gen-shader-headers.sh @@ -0,0 +1,55 @@ +#!/bin/sh + +set -e + +usage() { + echo "Usage: $0 [shader_file2 ...]" + echo + echo "Generates a C header file containing hex-encoded shader data." + echo + echo "Arguments:" + echo " src_dir Path to the base of the source directory" + echo " build_dir Directory where shader files are located and header will be written" + echo " output_header_name Name of the generated header file (relative to build_dir)" + echo " shader_file(s) One or more shader files to embed in the header" + exit 1 +} + +if [ $# -lt 4 ]; then + echo "Error: Invalid argument count." + usage +fi + +src_dir="$1"; shift +build_dir="$1"; shift +build_path=$build_dir/"$1"; shift + +cat < "$build_path" +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* This file is auto-generated, do not edit! */ + +#pragma once + +EOF + +cat <> "$build_path" +/* + * List the names of the shaders at the top of + * header for readability's sake + * +EOF + +for file in "$@"; do + name=$(basename "$build_dir/$file" | tr '.' '_') + echo "[SHADER-GEN] $name" + echo " * unsigned char $name;" >> "$build_path" +done + +echo "*/" >> "$build_path" + +echo "/* Hex encoded shader data */" >> "$build_path" +for file in "$@"; do + name=$(basename "$build_dir/$file") + "$src_dir/utils/gen-shader-header.py" "$name" "$build_dir/$file" >> "$build_path" + echo >> "$build_path" +done