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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
Download Patch File Download Diff File Expand all files Collapse all files

48
Source/Core/VideoCommon/GeometryShaderGen.cpp
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@ -39,11 +39,9 @@ GeometryShaderUid GetGeometryShaderUid(PrimitiveType primitive_type)
static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
const geometry_shader_uid_data* uid_data, const char* vertex,
APIType ApiType, bool wireframe, bool pixel_lighting,
bool first_vertex = false);
APIType ApiType, bool wireframe, bool first_vertex = false);
static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe,
bool pixel_lighting);
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe);
ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& host_config,
const geometry_shader_uid_data* uid_data)
@ -52,7 +50,6 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
// Non-uid template parameters will write to the dummy data (=> gets optimized out)
const bool wireframe = host_config.wireframe;
const bool pixel_lighting = g_ActiveConfig.bEnablePixelLighting;
const bool msaa = host_config.msaa;
const bool ssaa = host_config.ssaa;
const bool stereo = host_config.stereo;
@ -96,7 +93,7 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
"};\n");
out.Write("struct VS_OUTPUT {\n");
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting, "");
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, host_config, "");
out.Write("};\n");
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
@ -105,12 +102,12 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
out.Write("#define InstanceID gl_InvocationID\n");
out.Write("VARYING_LOCATION(0) in VertexData {\n");
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting,
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, host_config,
GetInterpolationQualifier(msaa, ssaa, true, true));
out.Write("} vs[%d];\n", vertex_in);
out.Write("VARYING_LOCATION(0) out VertexData {\n");
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, pixel_lighting,
GenerateVSOutputMembers<ShaderCode>(out, ApiType, uid_data->numTexGens, host_config,
GetInterpolationQualifier(msaa, ssaa, true, false));
if (stereo)
@ -152,8 +149,8 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
out.Write("\tVS_OUTPUT start, end;\n");
AssignVSOutputMembers(out, "start", "vs[0]", uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "end", "vs[1]", uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "start", "vs[0]", uid_data->numTexGens, host_config);
AssignVSOutputMembers(out, "end", "vs[1]", uid_data->numTexGens, host_config);
}
else
{
@ -183,7 +180,7 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
out.Write("\tVS_OUTPUT center;\n");
AssignVSOutputMembers(out, "center", "vs[0]", uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "center", "vs[0]", uid_data->numTexGens, host_config);
}
else
{
@ -214,7 +211,7 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
{
out.Write("\tVS_OUTPUT f;\n");
AssignVSOutputMembers(out, "f", "vs[i]", uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "f", "vs[i]", uid_data->numTexGens, host_config);
if (host_config.backend_depth_clamp &&
DriverDetails::HasBug(DriverDetails::BUG_BROKEN_CLIP_DISTANCE))
@ -266,8 +263,8 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
}
out.Write("\t}\n");
EmitVertex(out, host_config, uid_data, "l", ApiType, wireframe, pixel_lighting, true);
EmitVertex(out, host_config, uid_data, "r", ApiType, wireframe, pixel_lighting);
EmitVertex(out, host_config, uid_data, "l", ApiType, wireframe, true);
EmitVertex(out, host_config, uid_data, "r", ApiType, wireframe);
}
else if (primitive_type == PrimitiveType::Points)
{
@ -295,19 +292,19 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
}
out.Write("\t}\n");
EmitVertex(out, host_config, uid_data, "ll", ApiType, wireframe, pixel_lighting, true);
EmitVertex(out, host_config, uid_data, "lr", ApiType, wireframe, pixel_lighting);
EmitVertex(out, host_config, uid_data, "ul", ApiType, wireframe, pixel_lighting);
EmitVertex(out, host_config, uid_data, "ur", ApiType, wireframe, pixel_lighting);
EmitVertex(out, host_config, uid_data, "ll", ApiType, wireframe, true);
EmitVertex(out, host_config, uid_data, "lr", ApiType, wireframe);
EmitVertex(out, host_config, uid_data, "ul", ApiType, wireframe);
EmitVertex(out, host_config, uid_data, "ur", ApiType, wireframe);
}
else
{
EmitVertex(out, host_config, uid_data, "f", ApiType, wireframe, pixel_lighting, true);
EmitVertex(out, host_config, uid_data, "f", ApiType, wireframe, true);
}
out.Write("\t}\n");
EndPrimitive(out, host_config, uid_data, ApiType, wireframe, pixel_lighting);
EndPrimitive(out, host_config, uid_data, ApiType, wireframe);
if (stereo && !host_config.backend_gs_instancing)
out.Write("\t}\n");
@ -319,7 +316,7 @@ ShaderCode GenerateGeometryShaderCode(APIType ApiType, const ShaderHostConfig& h
static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
const geometry_shader_uid_data* uid_data, const char* vertex,
APIType ApiType, bool wireframe, bool pixel_lighting, bool first_vertex)
APIType ApiType, bool wireframe, bool first_vertex)
{
if (wireframe && first_vertex)
out.Write("\tif (i == 0) first = %s;\n", vertex);
@ -332,14 +329,14 @@ static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
out.Write("\tgl_ClipDistance[0] = %s.clipDist0;\n", vertex);
out.Write("\tgl_ClipDistance[1] = %s.clipDist1;\n", vertex);
}
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, host_config);
}
else if (ApiType == APIType::Vulkan)
{
// Vulkan NDC space has Y pointing down (right-handed NDC space).
out.Write("\tgl_Position = %s.pos;\n", vertex);
out.Write("\tgl_Position.y = -gl_Position.y;\n");
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, pixel_lighting);
AssignVSOutputMembers(out, "ps", vertex, uid_data->numTexGens, host_config);
}
else
{
@ -353,11 +350,10 @@ static void EmitVertex(ShaderCode& out, const ShaderHostConfig& host_config,
}
static void EndPrimitive(ShaderCode& out, const ShaderHostConfig& host_config,
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe,
bool pixel_lighting)
const geometry_shader_uid_data* uid_data, APIType ApiType, bool wireframe)
{
if (wireframe)
EmitVertex(out, host_config, uid_data, "first", ApiType, wireframe, pixel_lighting);
EmitVertex(out, host_config, uid_data, "first", ApiType, wireframe);
if (ApiType == APIType::OpenGL || ApiType == APIType::Vulkan)
out.Write("\tEndPrimitive();\n");