Shaders: Add AGB-001 shader

res/shaders/agb001.shader/agb001.fs

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+varying vec2 texCoord;
+uniform sampler2D tex;
+
+void main() {
+	vec4 color = texture2D(tex, texCoord);
+	vec3 arrayX[4];
+	arrayX[0] = vec3(1.0, 0.2, 0.2);
+	arrayX[1] = vec3(0.2, 1.0, 0.2);
+	arrayX[2] = vec3(0.2, 0.2, 1.0);
+	arrayX[3] = vec3(0.4, 0.4, 0.4);
+	vec3 arrayY[4];
+	arrayY[0] = vec3(1.0, 1.0, 1.0);
+	arrayY[1] = vec3(1.0, 1.0, 1.0);
+	arrayY[2] = vec3(1.0, 1.0, 1.0);
+	arrayY[3] = vec3(0.8, 0.8, 0.8);
+	color.rgb = pow(color.rgb * vec3(0.8, 0.8, 0.8), vec3(1.8, 1.8, 1.8)) + vec3(0.16, 0.16, 0.16);
+	color.rgb *= arrayX[int(mod(texCoord.s * 960.0, 4.0))];
+	color.rgb *= arrayY[int(mod(texCoord.t * 640.0, 4.0))];
+	color.a = 0.5;
+	gl_FragColor = color;
+}

res/shaders/agb001.shader/manifest.ini

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+[shader]
+name=AGB-001
+author=endrift
+description=A glorious recreation of the original Game Boy Advance
+passes=1
+
+[pass.0]
+fragmentShader=agb001.fs
+blend=1
+width=960
+height=640