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DolphinQt: cache icons instead of single pixmaps

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Fixes dynamically changing dpi scaling.
Load resources from svg if possible.
Currently svg support is not in Qt build in Externals,
and image files need to be added later.
This commit is contained in:
Shawn Hoffman 2023-04-23 03:43:49 -07:00
commit 51e528e45f
15 changed files with 94 additions and 218 deletions
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93
Source/Core/DolphinQt/QtUtils/WinIconHelper.cpp
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@ -1,93 +0,0 @@
// Copyright 2018 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#include "DolphinQt/QtUtils/WinIconHelper.h"
#ifdef _WIN32
#include <Windows.h>
// The following code is adapted from qpixmap_win.cpp (c) The Qt Company Ltd. (https://qt.io)
// Licensed under the GNU GPL v3
static inline BITMAPINFO GetBMI(int width, int height, bool topToBottom)
{
BITMAPINFO bmi = {};
auto& bih = bmi.bmiHeader;
bih.biSize = sizeof(BITMAPINFOHEADER);
bih.biWidth = width;
bih.biHeight = topToBottom ? -height : height;
bih.biPlanes = 1;
bih.biBitCount = 32;
bih.biCompression = BI_RGB;
bih.biSizeImage = width * height * 4;
return bmi;
}
static QPixmap PixmapFromHICON(HICON icon)
{
HDC screenDevice = GetDC(0);
HDC hdc = CreateCompatibleDC(screenDevice);
ReleaseDC(0, screenDevice);
ICONINFO iconinfo;
const bool result = GetIconInfo(icon, &iconinfo); // x and y Hotspot describes the icon center
if (!result)
{
qErrnoWarning("QPixmap::fromWinHICON(), failed to GetIconInfo()");
DeleteDC(hdc);
return QPixmap();
}
const int w = iconinfo.xHotspot * 2;
const int h = iconinfo.yHotspot * 2;
BITMAPINFO bitmapInfo = GetBMI(w, h, false);
DWORD* bits;
HBITMAP winBitmap = CreateDIBSection(hdc, &bitmapInfo, DIB_RGB_COLORS, (VOID**)&bits, nullptr, 0);
HGDIOBJ oldhdc = reinterpret_cast<HBITMAP>(SelectObject(hdc, winBitmap));
DrawIconEx(hdc, 0, 0, icon, iconinfo.xHotspot * 2, iconinfo.yHotspot * 2, 0, 0, DI_NORMAL);
QImage image(w, h, QImage::Format_ARGB32_Premultiplied);
if (image.isNull())
return {};
BITMAPINFO bmi = GetBMI(w, h, true);
QScopedArrayPointer<uchar> data(new uchar[bmi.bmiHeader.biSizeImage]);
if (!GetDIBits(hdc, winBitmap, 0, h, data.data(), &bmi, DIB_RGB_COLORS))
return {};
for (int y = 0; y < image.height(); ++y)
{
void* dest = static_cast<void*>(image.scanLine(y));
const void* src = data.data() + y * image.bytesPerLine();
memcpy(dest, src, image.bytesPerLine());
}
// dispose resources created by iconinfo call
DeleteObject(iconinfo.hbmMask);
DeleteObject(iconinfo.hbmColor);
SelectObject(hdc, oldhdc); // restore state
DeleteObject(winBitmap);
DeleteDC(hdc);
return QPixmap::fromImage(image);
}
QIcon WinIconHelper::GetNativeIcon()
{
QIcon icon;
for (int size : {16, 32, 48, 256})
{
HANDLE h = LoadImageW(GetModuleHandleW(nullptr), L"\"DOLPHIN\"", IMAGE_ICON, size, size,
LR_CREATEDIBSECTION);
if (h && h != INVALID_HANDLE_VALUE)
{
auto* icon_handle = static_cast<HICON>(h);
icon.addPixmap(PixmapFromHICON(icon_handle));
}
}
return icon;
}
#endif

15
Source/Core/DolphinQt/QtUtils/WinIconHelper.h
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@ -1,15 +0,0 @@
// Copyright 2018 Dolphin Emulator Project
// SPDX-License-Identifier: GPL-2.0-or-later
#pragma once
#ifdef _WIN32
#include <QIcon>
namespace WinIconHelper
{
QIcon GetNativeIcon();
};
#endif