From e059ed300d09517ebc9adf1f880f1da7658fb697 Mon Sep 17 00:00:00 2001
From: kokoko3k <kokoko3k@gmail.com>
Date: Sat, 6 Jan 2024 15:58:45 +0100
Subject: [PATCH] Add crt-resswitch-glitch-koko

---
 crt/crt-resswitch-glitch-koko.slangp        |  6 ++
 crt/shaders/crt-resswitch-glitch-koko.slang | 87 +++++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 crt/crt-resswitch-glitch-koko.slangp
 create mode 100644 crt/shaders/crt-resswitch-glitch-koko.slang

diff --git a/crt/crt-resswitch-glitch-koko.slangp b/crt/crt-resswitch-glitch-koko.slangp
new file mode 100644
index 00000000..7f054724
--- /dev/null
+++ b/crt/crt-resswitch-glitch-koko.slangp
@@ -0,0 +1,6 @@
+shaders = 1
+
+    shader0 = shaders/crt-resswitch-glitch-koko.slang
+scale_type0 = source
+    scale_0 = 1.0
+ wrap_mode0 = "clamp_to_border"
diff --git a/crt/shaders/crt-resswitch-glitch-koko.slang b/crt/shaders/crt-resswitch-glitch-koko.slang
new file mode 100644
index 00000000..3927f6ef
--- /dev/null
+++ b/crt/shaders/crt-resswitch-glitch-koko.slang
@@ -0,0 +1,87 @@
+#version 450
+
+/////////////////////////////  GPL LICENSE NOTICE  /////////////////////////////
+//
+//  crt-resswitch-glitch-koko
+//  Copyright (C) 2024 Antonio Orefice <kokoko3k@gmail.com>
+//
+//  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 any later version.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+
+layout(std140, set = 0, binding = 0) uniform UBO {
+    mat4 MVP;
+    vec4 SourceSize;
+    vec4 OriginalHistorySize1;
+    vec4 OriginalHistorySize2;
+    vec4 OriginalHistorySize3;
+    vec4 OriginalHistorySize4;
+    vec4 OriginalHistorySize5;
+    float RESSWITCH_ENABLE;
+    float RESSWITCH_GLITCH_TRESHOLD;
+    float RESSWITCH_GLITCH_BAR;
+    float RESSWITCH_GLITCH_SHAKE_MAX;
+} global;
+
+#pragma parameter RESSWITCH_ENABLE "★ Resolution switch glitch enable? ==>"     1.0  0.0 1.0  1.0
+#pragma parameter RESSWITCH_GLITCH_TRESHOLD  "    Glitch if vertical resolution changes at least by" 50.0 1.0 1000.0 5.0
+#pragma parameter RESSWITCH_GLITCH_BAR       "    Bright glitch bars strength"  0.2 0.0 1.0 0.01
+#pragma parameter RESSWITCH_GLITCH_SHAKE_MAX "    Screen shake amplitude"       0.2  0.0 1.0 0.01
+
+#pragma stage vertex
+layout(location = 0) in vec4 Position;
+layout(location = 1) in vec2 TexCoord;
+layout(location = 0) out vec2 vTexCoord;
+layout(location = 1) out float vSwitchres_show_bar;
+
+void main() {
+    gl_Position = global.MVP * Position;
+    vTexCoord = TexCoord * 1.0001;
+
+    vSwitchres_show_bar = 0.0;
+    if (global.RESSWITCH_ENABLE > 0.5 ) {
+        if (abs(global.SourceSize.y - global.OriginalHistorySize1.y) > global.RESSWITCH_GLITCH_TRESHOLD) {
+            //first frame
+            vSwitchres_show_bar = global.RESSWITCH_GLITCH_BAR;
+            vTexCoord.y += global.RESSWITCH_GLITCH_SHAKE_MAX * +1.0 ;
+        }
+        else if (abs(global.SourceSize.y - global.OriginalHistorySize2.y) > global.RESSWITCH_GLITCH_TRESHOLD) {
+            vSwitchres_show_bar = global.RESSWITCH_GLITCH_BAR;
+            vTexCoord.y += global.RESSWITCH_GLITCH_SHAKE_MAX * -1.0;
+        }
+        else if (abs(global.SourceSize.y - global.OriginalHistorySize3.y) > global.RESSWITCH_GLITCH_TRESHOLD) {
+            vSwitchres_show_bar = global.RESSWITCH_GLITCH_BAR;
+            vTexCoord.y += global.RESSWITCH_GLITCH_SHAKE_MAX * +0.5;
+        }
+        else if (abs(global.SourceSize.y - global.OriginalHistorySize4.y) > global.RESSWITCH_GLITCH_TRESHOLD) {
+            vSwitchres_show_bar = global.RESSWITCH_GLITCH_BAR;
+            vTexCoord.y += global.RESSWITCH_GLITCH_SHAKE_MAX * -0.5;
+        }
+        else if (abs(global.SourceSize.y - global.OriginalHistorySize5.y) > global.RESSWITCH_GLITCH_TRESHOLD) {
+            //last frame
+            vTexCoord.y += global.RESSWITCH_GLITCH_SHAKE_MAX * +0.25;
+            vSwitchres_show_bar = global.RESSWITCH_GLITCH_BAR;
+        }
+    }
+}
+
+#pragma stage fragment
+layout(location = 0) in vec2 vTexCoord;
+layout(location = 1) in float vSwitchres_show_bar;
+layout(location = 0) out vec4 FragColor;
+
+layout(set = 0, binding = 1) uniform sampler2D Source;
+
+#define _3kPI 3.141592653589793
+
+void main() {
+   float switchresglitch = 0.0;
+
+   if (vTexCoord.y < 0.0 ||vTexCoord.y > 1.0 )
+      switchresglitch = sin( vTexCoord.y * _3kPI * (2/global.RESSWITCH_GLITCH_SHAKE_MAX) ) * vSwitchres_show_bar;
+
+   FragColor = texture(Source, vTexCoord) + switchresglitch;
+}