From 4527929442e9850426c5e9fa41c775922a2adde8 Mon Sep 17 00:00:00 2001
From: Silverlan <silverlann@gmail.com>
Date: Sun, 3 Nov 2024 11:06:16 +0100
Subject: [PATCH] feat: add black-and-white shader

---
 .../lua/autorun/client/cl_bw_shader.lua         |  9 +++++++++
 .../addons/bw_shader/lua/shaders/bw/shader.lua  | 16 ++++++++++++++++
 .../scripts/localization/en/texts/bw_shader.txt |  1 +
 .../bw_shader/shaders/programs/scene/bw.frag    | 17 +++++++++++++++++
 4 files changed, 43 insertions(+)
 create mode 100644 assets/addons/bw_shader/lua/autorun/client/cl_bw_shader.lua
 create mode 100644 assets/addons/bw_shader/lua/shaders/bw/shader.lua
 create mode 100644 assets/addons/bw_shader/scripts/localization/en/texts/bw_shader.txt
 create mode 100644 assets/addons/bw_shader/shaders/programs/scene/bw.frag

diff --git a/assets/addons/bw_shader/lua/autorun/client/cl_bw_shader.lua b/assets/addons/bw_shader/lua/autorun/client/cl_bw_shader.lua
new file mode 100644
index 000000000..671171f31
--- /dev/null
+++ b/assets/addons/bw_shader/lua/autorun/client/cl_bw_shader.lua
@@ -0,0 +1,9 @@
+--[[
+    Copyright (C) 2024 Silverlan
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+]]
+
+include("/shaders/bw/shader.lua")
diff --git a/assets/addons/bw_shader/lua/shaders/bw/shader.lua b/assets/addons/bw_shader/lua/shaders/bw/shader.lua
new file mode 100644
index 000000000..208d9b5f0
--- /dev/null
+++ b/assets/addons/bw_shader/lua/shaders/bw/shader.lua
@@ -0,0 +1,16 @@
+--[[
+    Copyright (C) 2024 Silverlan
+
+    This Source Code Form is subject to the terms of the Mozilla Public
+    License, v. 2.0. If a copy of the MPL was not distributed with this
+    file, You can obtain one at http://mozilla.org/MPL/2.0/.
+]]
+
+local Shader = util.register_class("shader.BwShader", shader.BasePbr)
+
+Shader.FragmentShader = "programs/scene/bw"
+Shader.VertexShader = "programs/scene/textured"
+function Shader:InitializePipeline(pipelineInfo, pipelineIdx)
+	shader.BasePbr.InitializePipeline(self, pipelineInfo, pipelineIdx)
+end
+shader.register("bw", Shader)
diff --git a/assets/addons/bw_shader/scripts/localization/en/texts/bw_shader.txt b/assets/addons/bw_shader/scripts/localization/en/texts/bw_shader.txt
new file mode 100644
index 000000000..e38150b50
--- /dev/null
+++ b/assets/addons/bw_shader/scripts/localization/en/texts/bw_shader.txt
@@ -0,0 +1 @@
+c_bw = "Black and White"
\ No newline at end of file
diff --git a/assets/addons/bw_shader/shaders/programs/scene/bw.frag b/assets/addons/bw_shader/shaders/programs/scene/bw.frag
new file mode 100644
index 000000000..980e28087
--- /dev/null
+++ b/assets/addons/bw_shader/shaders/programs/scene/bw.frag
@@ -0,0 +1,17 @@
+#version 440
+
+#extension GL_ARB_separate_shader_objects : enable
+#extension GL_ARB_shading_language_420pack : enable
+
+#include "/programs/scene/pbr/fs_core.glsl"
+
+void main()
+{
+	vec2 uv = get_uv_coordinates();
+	vec4 albedoColor = fetch_albedo_map(uv, get_instance_color());
+	fs_color = calc_pbr(albedoColor, uv, u_pushConstants.debugMode);
+	float luminance = calc_luminance(fs_color.rgb);
+	fs_color.rgb = vec3(luminance, luminance, luminance);
+	if(CSPEC_BLOOM_OUTPUT_ENABLED == 1)
+		extract_bright_color(fs_color, u_renderer.bloomThreshold);
+}