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[idd] config: retain four-decimal refresh rates

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This commit is contained in:
Geoffrey McRae
2026-08-17 02:09:58 +10:00
parent c0de47b1e1
commit 9d074519b2
16 changed files with 93 additions and 76 deletions
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4
idd/LGCommon/PipeMsg.h
View File

@@ -51,7 +51,7 @@ struct LGPipeMsg
enum : uint32_t
{
RECOVERY_ACTIVE = 0x1U,
PROTOCOL_VERSION = 2U
PROTOCOL_VERSION = 3U
};
union
@@ -67,7 +67,7 @@ struct LGPipeMsg
{
uint32_t width;
uint32_t height;
uint32_t refreshMilliHz;
uint32_t refresh100uHz;
}
displayMode;

26
idd/LGCommon/RefreshRate.cpp
View File

@@ -50,14 +50,14 @@ static bool ToUnsigned(const std::wstring& text, unsigned& value)
return true;
}
bool LGParseRefreshRate(const std::wstring& text, unsigned& refreshMilliHz)
bool LGParseRefreshRate(const std::wstring& text, unsigned& refresh100uHz)
{
const std::wstring value = Trim(text);
const size_t decimal = value.find(L'.');
if (value.empty() ||
(decimal != std::wstring::npos &&
(value.find(L'.', decimal + 1) != std::wstring::npos ||
decimal == 0 || decimal + 4 < value.size())))
decimal == 0 || decimal + 5 < value.size())))
return false;
const std::wstring wholeText = value.substr(0, decimal);
@@ -71,30 +71,34 @@ bool LGParseRefreshRate(const std::wstring& text, unsigned& refreshMilliHz)
return false;
if (fractionText.size() == 1)
fraction *= 100;
fraction *= 1000;
else if (fractionText.size() == 2)
fraction *= 100;
else if (fractionText.size() == 3)
fraction *= 10;
const unsigned long long valueMilliHz =
(unsigned long long)whole * 1000 + fraction;
if (valueMilliHz < 23900 || valueMilliHz > 1000000)
const unsigned long long value100uHz =
(unsigned long long)whole * LG_REFRESH_RATE_SCALE + fraction;
if (value100uHz < 239000 || value100uHz > 10000000)
return false;
refreshMilliHz = (unsigned)valueMilliHz;
refresh100uHz = (unsigned)value100uHz;
return true;
}
std::wstring LGFormatRefreshRate(unsigned refreshMilliHz)
std::wstring LGFormatRefreshRate(unsigned refresh100uHz)
{
std::wstring result = std::to_wstring(refreshMilliHz / 1000);
const unsigned fraction = refreshMilliHz % 1000;
std::wstring result = std::to_wstring(
refresh100uHz / LG_REFRESH_RATE_SCALE);
const unsigned fraction = refresh100uHz % LG_REFRESH_RATE_SCALE;
if (!fraction)
return result;
const wchar_t text[] =
{
L'.',
(wchar_t)(L'0' + fraction / 100),
(wchar_t)(L'0' + fraction / 1000),
(wchar_t)(L'0' + fraction / 100 % 10),
(wchar_t)(L'0' + fraction / 10 % 10),
(wchar_t)(L'0' + fraction % 10),
L'\0'

7
idd/LGCommon/RefreshRate.h
View File

@@ -22,5 +22,8 @@
#include <string>
bool LGParseRefreshRate(const std::wstring& text, unsigned& refreshMilliHz);
std::wstring LGFormatRefreshRate(unsigned refreshMilliHz);
// Refresh rates are represented in 100 microhertz units.
static constexpr unsigned LG_REFRESH_RATE_SCALE = 10000;
bool LGParseRefreshRate(const std::wstring& text, unsigned& refresh100uHz);
std::wstring LGFormatRefreshRate(unsigned refresh100uHz);