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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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76 lines
1.9 KiB
HLSL
76 lines
1.9 KiB
HLSL
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/* GStreamer
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* Copyright (C) 2023 Seungha Yang <seungha@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef BUILDING_HLSL
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cbuffer SnowConstBuffer : register(b0)
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{
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float time;
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float alpha;
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float2 padding;
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};
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struct PS_INPUT
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{
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float4 Position : SV_POSITION;
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float2 Texture : TEXCOORD;
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};
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float get_rand (float2 uv)
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{
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return frac (sin (dot (uv, float2 (12.9898,78.233))) * 43758.5453);
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}
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float4 PSMain_snow (PS_INPUT input) : SV_Target
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{
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float4 output;
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float val = get_rand (time * input.Texture);
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output.rgb = float3(val, val, val);
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output.a = alpha;
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return output;
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}
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#else
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static const char g_PSMain_snow_str[] =
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"cbuffer TimeConstBuffer : register(b0)\n"
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"{\n"
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" float time;\n"
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" float alpha;\n"
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" float2 padding;\n"
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"};\n"
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"\n"
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"struct PS_INPUT\n"
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"{\n"
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" float4 Position : SV_POSITION;\n"
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" float2 Texture : TEXCOORD;\n"
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"};\n"
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"\n"
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"float get_rand(float2 uv)\n"
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"{\n"
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" return frac (sin (dot (uv, float2 (12.9898,78.233))) * 43758.5453);\n"
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"}\n"
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"\n"
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"float4 PSMain_snow (PS_INPUT input) : SV_Target\n"
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"{\n"
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" float4 output;\n"
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" float val = get_rand (time * input.Texture);\n"
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" output.rgb = float3(val, val, val);\n"
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" output.a = alpha;\n"
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" return output;\n"
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"}\n";
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#endif
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