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[qt] fix the blurry and pixelled images of the games in the main screen (#3398)

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Authored-by: Bruno <protoxseven@gmail.com>
Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3398
Reviewed-by: MaranBr <maranbr@eden-emu.dev>
Reviewed-by: crueter <crueter@eden-emu.dev>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>
This commit is contained in:
lizzie
2026-01-28 21:18:12 +01:00
committed by crueter
parent 4624b16cc6
commit c974f3e0fb
1 changed files with 17 additions and 22 deletions
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39
src/yuzu/main.cpp
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@@ -1,4 +1,4 @@
// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
// SPDX-License-Identifier: GPL-3.0-or-later
#include <QApplication>
@@ -31,7 +31,7 @@ static void OverrideWindowsFont() {
}
#endif
static void SetHighDPIAttributes() {
static Qt::HighDpiScaleFactorRoundingPolicy GetHighDpiRoundingPolicy() {
#ifdef _WIN32
// For Windows, we want to avoid scaling artifacts on fractional scaling ratios.
// This is done by setting the optimal scaling policy for the primary screen.
@@ -44,36 +44,30 @@ static void SetHighDPIAttributes() {
// Get the current screen geometry.
const QScreen* primary_screen = QGuiApplication::primaryScreen();
if (primary_screen == nullptr) {
return;
return Qt::HighDpiScaleFactorRoundingPolicy::PassThrough;
}
const QRect screen_rect = primary_screen->geometry();
const int real_width = screen_rect.width();
const int real_height = screen_rect.height();
const float real_ratio = primary_screen->logicalDotsPerInch() / 96.0f;
const qreal real_ratio = primary_screen->devicePixelRatio();
const qreal real_width = std::trunc(screen_rect.width() * real_ratio);
const qreal real_height = std::trunc(screen_rect.height() * real_ratio);
// Recommended minimum width and height for proper window fit.
// Any screen with a lower resolution than this will still have a scale of 1.
constexpr float minimum_width = 1350.0f;
constexpr float minimum_height = 900.0f;
constexpr qreal minimum_width = 1350.0;
constexpr qreal minimum_height = 900.0;
const float width_ratio = (std::max)(1.0f, real_width / minimum_width);
const float height_ratio = (std::max)(1.0f, real_height / minimum_height);
const qreal width_ratio = std::max(1.0, real_width / minimum_width);
const qreal height_ratio = std::max(1.0, real_height / minimum_height);
// Get the lower of the 2 ratios and truncate, this is the maximum integer scale.
const float max_ratio = std::trunc((std::min)(width_ratio, height_ratio));
if (max_ratio > real_ratio) {
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::Round);
} else {
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::Floor);
}
const qreal max_ratio = std::trunc(std::min(width_ratio, height_ratio));
return max_ratio > real_ratio
? Qt::HighDpiScaleFactorRoundingPolicy::Round
: Qt::HighDpiScaleFactorRoundingPolicy::Floor;
#else
// Other OSes should be better than Windows at fractional scaling.
QApplication::setHighDpiScaleFactorRoundingPolicy(
Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
return Qt::HighDpiScaleFactorRoundingPolicy::PassThrough;
#endif
}
@@ -139,7 +133,8 @@ int main(int argc, char* argv[]) {
QGuiApplication::setDesktopFileName(QStringLiteral("dev.eden_emu.eden"));
#endif
SetHighDPIAttributes();
auto rounding_policy = GetHighDpiRoundingPolicy();
QApplication::setHighDpiScaleFactorRoundingPolicy(rounding_policy);
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
// Disables the "?" button on all dialogs. Disabled by default on Qt6.