AuroraMiddleware/SPIRV-Cross
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Corrects some problems converting to compilable MSL from SPIRV. A better solution is to refactor the glsl compiler base-class so some keywords and actions can be overridden, and then the msl subclass can override them - this is a quick & dirty solution.

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- adds some common macros that correct for intrinsic differences
 - adds some inline functions to adapt for GLSL terms
 - injects structure member names when the original SPV has been stripped - there is another way to use the correct temporarily assigned member name, but using m_<id> based on the inside SPV code yields metal code that more correctly maps to the original SPV opcodes/slots.
This commit is contained in:
Nathaniel Brown 2016-10-21 13:48:21 -07:00
parent a759e2c872
commit 9577568d56
2 changed files with 15 additions and 1 deletions
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8
spirv_cross.cpp
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@ -1175,9 +1175,17 @@ void Compiler::parse(const Instruction &instruction)
auto decoration = static_cast<Decoration>(ops[1]);
if (length >= 3)
{
set_decoration(id, decoration, ops[2]);
if (meta.at(id).decoration.alias.empty())
set_name(id, "m_" + convert_to_string(id));
}
else
{
set_decoration(id, decoration);
if (meta.at(id).decoration.alias.empty())
set_name(id, "m_" + convert_to_string(id));
}
break;
}

8
spirv_msl.cpp
View File

@ -510,6 +510,12 @@ void CompilerMSL::emit_header()
statement("");
statement("using namespace metal;");
statement("");
statement("#define discard discard_fragment()");
statement("#define dFdy dfdy");
statement("#define dFdx dfdy");
statement("#define atan(x,y) atan2((y),(x))");
statement("inline bool greaterThan(float2 a,float2 b) { return all(a>b) ? true : false; }");
statement("inline uint2 imageSize(thread const texture2d<float>& tex) { return uint2(tex.get_width(), tex.get_height()); }");
}
void CompilerMSL::emit_resources()
@ -1568,7 +1574,7 @@ string CompilerMSL::builtin_to_glsl(BuiltIn builtin)
switch (builtin)
{
case BuiltInPosition:
return (stage_out_var_name + ".gl_Position");
return qual_pos_var_name.empty() ? (stage_out_var_name + ".gl_Position") : qual_pos_var_name;
case BuiltInPointSize:
return (stage_out_var_name + ".gl_PointSize");
case BuiltInVertexId: