{"id":25496,"url":"https://patchwork.libcamera.org/api/patches/25496/?format=json","web_url":"https://patchwork.libcamera.org/patch/25496/","project":{"id":1,"url":"https://patchwork.libcamera.org/api/projects/1/?format=json","name":"libcamera","link_name":"libcamera","list_id":"libcamera_core","list_email":"libcamera-devel@lists.libcamera.org","web_url":"","scm_url":"","webscm_url":""},"msgid":"<20251211232246.31330-3-bryan.odonoghue@linaro.org>","date":"2025-12-11T23:22:27","name":"[v5,02/20] utils: gen-shader-headers: Add a utility to generate headers from shaders","commit_ref":null,"pull_url":null,"state":"accepted","archived":false,"hash":"533646a11e53043036bbed1cead848a006bbb244","submitter":{"id":175,"url":"https://patchwork.libcamera.org/api/people/175/?format=json","name":"Bryan O'Donoghue","email":"bryan.odonoghue@linaro.org"},"delegate":null,"mbox":"https://patchwork.libcamera.org/patch/25496/mbox/","series":[{"id":5656,"url":"https://patchwork.libcamera.org/api/series/5656/?format=json","web_url":"https://patchwork.libcamera.org/project/libcamera/list/?series=5656","date":"2025-12-11T23:22:25","name":"GPUISP precursor series","version":5,"mbox":"https://patchwork.libcamera.org/series/5656/mbox/"}],"comments":"https://patchwork.libcamera.org/api/patches/25496/comments/","check":"pending","checks":"https://patchwork.libcamera.org/api/patches/25496/checks/","tags":{},"headers":{"Return-Path":"","X-Original-To":"parsemail@patchwork.libcamera.org","Delivered-To":"parsemail@patchwork.libcamera.org","Received":["from lancelot.ideasonboard.com (lancelot.ideasonboard.com\n\t[92.243.16.209])\n\tby patchwork.libcamera.org (Postfix) with ESMTPS id 00345C3257\n\tfor ;\n\tThu, 11 Dec 2025 23:23:17 +0000 (UTC)","from lancelot.ideasonboard.com (localhost [IPv6:::1])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTP id AF3E661624;\n\tFri, 12 Dec 2025 00:23:17 +0100 (CET)","from mail-pf1-x42d.google.com (mail-pf1-x42d.google.com\n\t[IPv6:2607:f8b0:4864:20::42d])\n\tby lancelot.ideasonboard.com (Postfix) with ESMTPS id 92CA461613\n\tfor ;\n\tFri, 12 Dec 2025 00:23:16 +0100 (CET)","by mail-pf1-x42d.google.com with SMTP id\n\td2e1a72fcca58-7b9215e55e6so446153b3a.2\n\tfor ;\n\tThu, 11 Dec 2025 15:23:16 -0800 (PST)","from inspiron14p-linux (M106185144161.v4.enabler.ne.jp.\n\t[106.185.144.161]) by smtp.gmail.com with ESMTPSA id\n\td2e1a72fcca58-7f4c4ab52aasm3399933b3a.38.2025.12.11.15.23.09\n\t(version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256);\n\tThu, 11 Dec 2025 15:23:14 -0800 (PST)"],"Authentication-Results":"lancelot.ideasonboard.com; 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\n\tThu, 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 ,\n\tKieran Bingham ,\n\tMilan Zamazal ","Subject":"[PATCH v5 02/20] utils: gen-shader-headers: Add a utility to\n\tgenerate 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","Content-Transfer-Encoding":"8bit","X-BeenThere":"libcamera-devel@lists.libcamera.org","X-Mailman-Version":"2.1.29","Precedence":"list","List-Id":"","List-Unsubscribe":",\n\t","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n\t","Errors-To":"libcamera-devel-bounces@lists.libcamera.org","Sender":"\"libcamera-devel\" "},"content":"Two simple script to generate a header that contains GLSL shaders translated\nto C arrays.\n\nAcked-by: Kieran Bingham \nReviewed-by: Milan Zamazal \nSigned-off-by: Bryan O'Donoghue \n---\n utils/gen-shader-header.py | 37 +++++++++++++++++++++++++\n utils/gen-shader-headers.sh | 55 +++++++++++++++++++++++++++++++++++++\n 2 files changed, 92 insertions(+)\n create mode 100755 utils/gen-shader-header.py\n create mode 100755 utils/gen-shader-headers.sh","diff":"diff --git a/utils/gen-shader-header.py b/utils/gen-shader-header.py\nnew file mode 100755\nindex 000000000..745852b4c\n--- /dev/null\n+++ b/utils/gen-shader-header.py\n@@ -0,0 +1,37 @@\n+#!/usr/bin/env python3\n+# SPDX-License-Identifier: GPL-2.0-or-later\n+# Copyright (C) 2025, Bryan O'Donoghue.\n+#\n+# Author: Bryan O'Donoghue \n+#\n+# A Python script which takes a list of shader files and converts each of them\n+# into a C header.\n+#\n+import sys\n+\n+try:\n+ with open(sys.argv[2], \"rb\") as file:\n+ data = file.read()\n+ data_len = len(data)\n+\n+ name = sys.argv[1].replace(\".\", \"_\")\n+ name_len = name + \"_len\"\n+\n+ j = 0\n+ print(\"unsigned char const\", name, \"[] = {\")\n+ for ch in data:\n+ print(f\"0x{ch:02x}, \", end=\"\")\n+ j = (j + 1) % 16\n+ if j == 0:\n+ print()\n+ if j != 0:\n+ print()\n+ print(\"};\")\n+\n+ print()\n+ print(f\"const unsigned int {name_len}={data_len};\")\n+\n+except FileNotFoundError:\n+ print(f\"File {sys.argv[2]} not found\", file=sys.stderr)\n+except IOError:\n+ print(f\"Unable to read {sys.argv[2]}\", file=sys.stderr)\ndiff --git a/utils/gen-shader-headers.sh b/utils/gen-shader-headers.sh\nnew file mode 100755\nindex 000000000..81bf1584c\n--- /dev/null\n+++ b/utils/gen-shader-headers.sh\n@@ -0,0 +1,55 @@\n+#!/bin/sh\n+\n+set -e\n+\n+usage() {\n+\techo \"Usage: $0 [shader_file2 ...]\"\n+\techo\n+\techo \"Generates a C header file containing hex-encoded shader data.\"\n+\techo\n+\techo \"Arguments:\"\n+\techo \" src_dir Path to the base of the source directory\"\n+\techo \" build_dir Directory where shader files are located and header will be written\"\n+\techo \" output_header_name Name of the generated header file (relative to build_dir)\"\n+\techo \" shader_file(s) One or more shader files to embed in the header\"\n+\texit 1\n+}\n+\n+if [ $# -lt 4 ]; then\n+\techo \"Error: Invalid argument count.\"\n+\tusage\n+fi\n+\n+src_dir=\"$1\"; shift\n+build_dir=\"$1\"; shift\n+build_path=$build_dir/\"$1\"; shift\n+\n+cat < \"$build_path\"\n+/* SPDX-License-Identifier: LGPL-2.1-or-later */\n+/* This file is auto-generated, do not edit! */\n+\n+#pragma once\n+\n+EOF\n+\n+cat <> \"$build_path\"\n+/*\n+ * List the names of the shaders at the top of\n+ * header for readability's sake\n+ *\n+EOF\n+\n+for file in \"$@\"; do\n+\tname=$(basename \"$build_dir/$file\" | tr '.' '_')\n+\techo \"[SHADER-GEN] $name\"\n+\techo \" * unsigned char $name;\" >> \"$build_path\"\n+done\n+\n+echo \"*/\" >> \"$build_path\"\n+\n+echo \"/* Hex encoded shader data */\" >> \"$build_path\"\n+for file in \"$@\"; do\n+\tname=$(basename \"$build_dir/$file\")\n+\t\"$src_dir/utils/gen-shader-header.py\" \"$name\" \"$build_dir/$file\" >> \"$build_path\"\n+\techo >> \"$build_path\"\n+done\n","prefixes":["v5","02/20"]}