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// Copyright 2024 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.h"
#include <algorithm>
#include <array>
#include <variant>
#include "Common/Contains.h"
#include "Common/Logging/Log.h"
#include "Common/VariantUtil.h"
#include "VideoCommon/AbstractGfx.h"
namespace
{
bool IsQualifier(std::string_view value)
{
static constexpr std::array<std::string_view, 7> qualifiers = {
"attribute", "const", "highp", "lowp", "mediump", "uniform", "varying",
};
return Common::Contains(qualifiers, value);
}
bool IsBuiltInMacro(std::string_view value)
{
static constexpr std::array<std::string_view, 5> built_in = {
"__LINE__", "__FILE__", "__VERSION__", "GL_core_profile", "GL_compatibility_profile",
};
return Common::Contains(built_in, value);
}
std::vector<std::string> GlobalConflicts(std::string_view source)
{
std::string_view last_identifier = "";
std::vector<std::string> global_result;
u32 scope = 0;
for (u32 i = 0; i < source.size(); i++)
{
// If we're out of global scope, we don't care
// about any of the details
if (scope > 0)
{
if (source[i] == '{')
{
scope++;
}
else if (source[i] == '}')
{
scope--;
}
continue;
}
const auto parse_identifier = [&] {
const u32 start = i;
for (; i < source.size(); i++)
{
if (!Common::IsAlpha(source[i]) && source[i] != '_' && !std::isdigit(source[i]))
break;
}
u32 end = i;
i--; // unwind
return source.substr(start, end - start);
};
if (Common::IsAlpha(source[i]) || source[i] == '_')
{
const std::string_view identifier = parse_identifier();
if (IsQualifier(identifier))
continue;
if (IsBuiltInMacro(identifier))
continue;
last_identifier = identifier;
}
else if (source[i] == '#')
{
const auto parse_until_end_of_preprocessor = [&] {
bool continue_until_next_newline = false;
for (; i < source.size(); i++)
{
if (source[i] == '\n')
{
if (continue_until_next_newline)
continue_until_next_newline = false;
else
break;
}
else if (source[i] == '\\')
{
continue_until_next_newline = true;
}
}
};
i++;
const std::string_view identifier = parse_identifier();
if (identifier == "define")
{
i++;
// skip whitespace
while (source[i] == ' ')
{
i++;
}
global_result.emplace_back(parse_identifier());
parse_until_end_of_preprocessor();
}
else
{
parse_until_end_of_preprocessor();
}
}
else if (source[i] == '{')
{
scope++;
}
else if (source[i] == '(')
{
// Unlikely the user will be using layouts but...
if (last_identifier == "layout")
continue;
// Since we handle equality, we can assume the identifier
// before '(' is a function definition
global_result.emplace_back(last_identifier);
}
else if (source[i] == '=')
{
global_result.emplace_back(last_identifier);
i++;
for (; i < source.size(); i++)
{
if (source[i] == ';')
break;
}
}
else if (source[i] == '/')
{
if ((i + 1) >= source.size())
continue;
if (source[i + 1] == '/')
{
// Go to end of line...
for (; i < source.size(); i++)
{
if (source[i] == '\n')
break;
}
}
else if (source[i + 1] == '*')
{
// Multiline, look for first '*/'
for (; i < source.size(); i++)
{
if (source[i] == '/' && source[i - 1] == '*')
break;
}
}
}
}
// Sort the conflicts from largest to smallest string
// this way we can ensure smaller strings that are a substring
// of the larger string are able to be replaced appropriately
std::ranges::sort(global_result, std::ranges::greater{},
[](const std::string& s) { return s.size(); });
return global_result;
}
} // namespace
void CustomPipeline::UpdatePixelData(std::shared_ptr<VideoCommon::CustomAssetLibrary>,
std::span<const u32>,
const VideoCommon::CustomAssetLibrary::AssetID&)
{
}
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