/* GStreamer * Copyright (C) 2023 Seungha Yang <seungha@centricular.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ cbuffer CheckerConstBuffer : register(b0) { float width; float height; float checker_size; float alpha; }; struct PS_INPUT { float4 Position: SV_POSITION; float2 Texture: TEXCOORD; }; float4 PSMain_checker (PS_INPUT input) : SV_Target { float4 output; float2 xy_mod = floor (0.5 * input.Texture * float2 (width, height) / checker_size); float result = fmod (xy_mod.x + xy_mod.y, 2.0); output.r = step (result, 0.5); output.g = 1.0 - output.r; output.b = 0; output.a = alpha; return output; }