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ShaderGen: Omit some unused varyings when possible

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Removes the clipPos varying unless slow-depth is used, and the
clipDistance varyings if geometry shaders are not used.
This commit is contained in:
Stenzek
2019-01-23 18:11:17 +10:00
parent 3627ef8a04
commit 68cb24172b
7 changed files with 107 additions and 74 deletions
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27
Source/Core/VideoCommon/PixelShaderGen.cpp
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@ -351,7 +351,7 @@ void ClearUnusedPixelShaderUidBits(APIType ApiType, const ShaderHostConfig& host
}
void WritePixelShaderCommonHeader(ShaderCode& out, APIType ApiType, u32 num_texgens,
bool per_pixel_lighting, bool bounding_box)
const ShaderHostConfig& host_config, bool bounding_box)
{
// dot product for integer vectors
out.Write("int idot(int3 x, int3 y)\n"
@ -430,7 +430,7 @@ void WritePixelShaderCommonHeader(ShaderCode& out, APIType ApiType, u32 num_texg
"#define bpmem_tevorder(i) (bpmem_pack2[(i)].x)\n"
"#define bpmem_tevksel(i) (bpmem_pack2[(i)].y)\n\n");
if (per_pixel_lighting)
if (host_config.per_pixel_lighting)
{
out.Write("%s", s_lighting_struct);
@ -458,7 +458,7 @@ void WritePixelShaderCommonHeader(ShaderCode& out, APIType ApiType, u32 num_texg
}
out.Write("struct VS_OUTPUT {\n");
GenerateVSOutputMembers(out, ApiType, num_texgens, per_pixel_lighting, "");
GenerateVSOutputMembers(out, ApiType, num_texgens, host_config, "");
out.Write("};\n");
}
@ -491,7 +491,7 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const ShaderHostConfig& host
uid_data->genMode_numindstages);
// Stuff that is shared between ubershaders and pixelgen.
WritePixelShaderCommonHeader(out, ApiType, uid_data->genMode_numtexgens, per_pixel_lighting,
WritePixelShaderCommonHeader(out, ApiType, uid_data->genMode_numtexgens, host_config,
uid_data->bounding_box);
if (uid_data->forced_early_z && g_ActiveConfig.backend_info.bSupportsEarlyZ)
@ -591,7 +591,7 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const ShaderHostConfig& host
if (host_config.backend_geometry_shaders || ApiType == APIType::Vulkan)
{
out.Write("VARYING_LOCATION(0) in VertexData {\n");
GenerateVSOutputMembers(out, ApiType, uid_data->genMode_numtexgens, per_pixel_lighting,
GenerateVSOutputMembers(out, ApiType, uid_data->genMode_numtexgens, host_config,
GetInterpolationQualifier(msaa, ssaa, true, true));
if (stereo)
@ -609,7 +609,8 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const ShaderHostConfig& host
{
out.Write("%s in float3 tex%d;\n", GetInterpolationQualifier(msaa, ssaa), i);
}
out.Write("%s in float4 clipPos;\n", GetInterpolationQualifier(msaa, ssaa));
if (!host_config.fast_depth_calc)
out.Write("%s in float4 clipPos;\n", GetInterpolationQualifier(msaa, ssaa));
if (per_pixel_lighting)
{
out.Write("%s in float3 Normal;\n", GetInterpolationQualifier(msaa, ssaa));
@ -646,8 +647,11 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const ShaderHostConfig& host
for (unsigned int i = 0; i < uid_data->genMode_numtexgens; ++i)
out.Write(",\n in %s float3 tex%d : TEXCOORD%d", GetInterpolationQualifier(msaa, ssaa), i,
i);
out.Write(",\n in %s float4 clipPos : TEXCOORD%d", GetInterpolationQualifier(msaa, ssaa),
uid_data->genMode_numtexgens);
if (!host_config.fast_depth_calc)
{
out.Write(",\n in %s float4 clipPos : TEXCOORD%d", GetInterpolationQualifier(msaa, ssaa),
uid_data->genMode_numtexgens);
}
if (per_pixel_lighting)
{
out.Write(",\n in %s float3 Normal : TEXCOORD%d", GetInterpolationQualifier(msaa, ssaa),
@ -655,8 +659,11 @@ ShaderCode GeneratePixelShaderCode(APIType ApiType, const ShaderHostConfig& host
out.Write(",\n in %s float3 WorldPos : TEXCOORD%d", GetInterpolationQualifier(msaa, ssaa),
uid_data->genMode_numtexgens + 2);
}
out.Write(",\n in float clipDist0 : SV_ClipDistance0\n");
out.Write(",\n in float clipDist1 : SV_ClipDistance1\n");
if (host_config.backend_geometry_shaders)
{
out.Write(",\n in float clipDist0 : SV_ClipDistance0\n");
out.Write(",\n in float clipDist1 : SV_ClipDistance1\n");
}
if (stereo)
out.Write(",\n in uint layer : SV_RenderTargetArrayIndex\n");
out.Write(" ) {\n");