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D3D / VideoCommon: generate HLSL from SPIRV

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This commit is contained in:
iwubcode
2022-05-04 00:41:34 -05:00
parent 3790c99a7d
commit 5dd2704416
20 changed files with 780 additions and 1121 deletions
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67
Source/Core/VideoCommon/ShaderGenCommon.h
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@ -18,6 +18,7 @@
#include "Common/StringUtil.h"
#include "Common/TypeUtils.h"
#include "VideoCommon/AbstractShader.h"
#include "VideoCommon/VideoCommon.h"
/**
@ -189,7 +190,8 @@ void WriteBitfieldExtractHeader(ShaderCode& out, APIType api_type,
const ShaderHostConfig& host_config);
void GenerateVSOutputMembers(ShaderCode& object, APIType api_type, u32 texgens,
const ShaderHostConfig& host_config, std::string_view qualifier);
const ShaderHostConfig& host_config, std::string_view qualifier,
ShaderStage stage);
void AssignVSOutputMembers(ShaderCode& object, std::string_view a, std::string_view b, u32 texgens,
const ShaderHostConfig& host_config);
@ -220,57 +222,34 @@ void WriteSwitch(ShaderCode& out, APIType ApiType, std::string_view variable,
const Common::EnumMap<std::string_view, last_member>& values, int indent,
bool break_)
{
const bool make_switch = (ApiType == APIType::D3D);
// The second template argument is needed to avoid compile errors from ambiguity with multiple
// enums with the same number of members in GCC prior to 8. See https://godbolt.org/z/xcKaW1seW
// and https://godbolt.org/z/hz7Yqq1P5
using enum_type = decltype(last_member);
// {:{}} is used to indent by formatting an empty string with a variable width
if (make_switch)
{
out.Write("{:{}}switch ({}) {{\n", "", indent, variable);
for (u32 i = 0; i <= static_cast<u32>(last_member); i++)
// Generate a tree of if statements recursively
// std::function must be used because auto won't capture before initialization and thus can't be
// used recursively
std::function<void(u32, u32, u32)> BuildTree = [&](u32 cur_indent, u32 low, u32 high) {
// Each generated statement is for low <= x < high
if (high == low + 1)
{
const enum_type key = static_cast<enum_type>(i);
// Assumes existence of an EnumFormatter
out.Write("{:{}}case {:s}:\n", "", indent, key);
// Down to 1 case (low <= x < low + 1 means x == low)
const enum_type key = static_cast<enum_type>(low);
// Note that this indentation behaves poorly for multi-line code
if (!values[key].empty())
out.Write("{:{}} {}\n", "", indent, values[key]);
if (break_)
out.Write("{:{}} break;\n", "", indent);
out.Write("{:{}}{} // {}\n", "", cur_indent, values[key], key);
}
out.Write("{:{}}}}\n", "", indent);
}
else
{
// Generate a tree of if statements recursively
// std::function must be used because auto won't capture before initialization and thus can't be
// used recursively
std::function<void(u32, u32, u32)> BuildTree = [&](u32 cur_indent, u32 low, u32 high) {
// Each generated statement is for low <= x < high
if (high == low + 1)
{
// Down to 1 case (low <= x < low + 1 means x == low)
const enum_type key = static_cast<enum_type>(low);
// Note that this indentation behaves poorly for multi-line code
out.Write("{:{}}{} // {}\n", "", cur_indent, values[key], key);
}
else
{
u32 mid = low + ((high - low) / 2);
out.Write("{:{}}if ({} < {}u) {{\n", "", cur_indent, variable, mid);
BuildTree(cur_indent + 2, low, mid);
out.Write("{:{}}}} else {{\n", "", cur_indent);
BuildTree(cur_indent + 2, mid, high);
out.Write("{:{}}}}\n", "", cur_indent);
}
};
BuildTree(indent, 0, static_cast<u32>(last_member) + 1);
}
else
{
u32 mid = low + ((high - low) / 2);
out.Write("{:{}}if ({} < {}u) {{\n", "", cur_indent, variable, mid);
BuildTree(cur_indent + 2, low, mid);
out.Write("{:{}}}} else {{\n", "", cur_indent);
BuildTree(cur_indent + 2, mid, high);
out.Write("{:{}}}}\n", "", cur_indent);
}
};
BuildTree(indent, 0, static_cast<u32>(last_member) + 1);
}
// Constant variable names