Res: Add TV Mode shader

res/shaders/tv-mode.shader/manifest.ini

@@ -0,0 +1,25 @@
+[shader]
+name=TV Mode
+author=Dominus Iniquitatis
+description=Scanlines along with a subtle blurring.
+passes=1
+
+[pass.0]
+fragmentShader=tv.fs
+blend=1
+width=-2
+height=-2
+
+[pass.0.uniform.lineBrightness]
+type=float
+readableName=Line brightness
+default=0.75
+min=0.0
+max=1.0
+
+[pass.0.uniform.blurring]
+type=float
+readableName=Blurring
+default=1.0
+min=0.0
+max=1.0

res/shaders/tv-mode.shader/tv.fs

@@ -0,0 +1,44 @@
+/*
+   TV Mode Shader
+
+   Copyright (C) 2022 Dominus Iniquitatis - zerosaiko@gmail.com
+
+   Permission is hereby granted, free of charge, to any person obtaining a copy
+   of this software and associated documentation files (the "Software"), to deal
+   in the Software without restriction, including without limitation the rights
+   to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+   copies of the Software, and to permit persons to whom the Software is
+   furnished to do so, subject to the following conditions:
+   The above copyright notice and this permission notice shall be included in
+   all copies or substantial portions of the Software.
+   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+   AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+   LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+   OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+   THE SOFTWARE.
+*/
+
+uniform sampler2D tex;
+uniform vec2 texSize;
+varying vec2 texCoord;
+
+uniform float lineBrightness;
+uniform float blurring;
+
+void main()
+{
+    vec4 c = texture2D(tex, texCoord);
+    vec4 n = texture2D(tex, texCoord + vec2(1.0 / texSize.x * 0.5, 0.0));
+
+    vec4 color = mix(c, (c + n) / 2.0, blurring);
+    color.a = c.a;
+
+	if (int(mod(texCoord.t * texSize.y * 2.0, 2.0)) == 0)
+	{
+		color.rgb *= lineBrightness;
+	}
+
+	gl_FragColor = color;
+}