gstreamer/subprojects/gst-plugins-bad/sys/d3d12/hlsl/PSMain_checker.hlsl

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/* 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;
}