28 lines
975 B
C++
28 lines
975 B
C++
// Copyright 2017 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "VideoCommon/UberShaderCommon.h"
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#include "VideoCommon/VideoConfig.h"
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namespace UberShader
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{
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void WriteUberShaderCommonHeader(ShaderCode& out, APIType api_type,
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const ShaderHostConfig& host_config)
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{
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// ==============================================
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// BitfieldExtract for APIs which don't have it
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// ==============================================
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if (!host_config.backend_bitfield)
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{
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out.Write("uint bitfieldExtract(uint val, int off, int size) {\n"
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" // This built-in function is only support in OpenGL 4.0+ and ES 3.1+\n"
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" // Microsoft's HLSL compiler automatically optimises this to a bitfield extract "
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"instruction.\n"
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" uint mask = uint((1 << size) - 1);\n"
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" return uint(val >> off) & mask;\n"
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"}\n\n");
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}
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}
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}
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