95 lines
2.6 KiB
C++
95 lines
2.6 KiB
C++
// Copyright 2018 Dolphin Emulator Project
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// Licensed under GPLv2+
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// Refer to the license.txt file included.
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#include "DolphinQt2/QtUtils/WinIconHelper.h"
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#ifdef _WIN32
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#include <Windows.h>
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// The following code is adapted from qpixmap_win.cpp (c) The Qt Company Ltd. (https://qt.io)
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// Licensed under the GNU GPL v3
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static inline BITMAPINFO GetBMI(int width, int height, bool topToBottom)
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{
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BITMAPINFO bmi = {};
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auto& bih = bmi.bmiHeader;
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bih.biSize = sizeof(BITMAPINFOHEADER);
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bih.biWidth = width;
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bih.biHeight = topToBottom ? -height : height;
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bih.biPlanes = 1;
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bih.biBitCount = 32;
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bih.biCompression = BI_RGB;
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bih.biSizeImage = width * height * 4;
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return bmi;
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}
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static QPixmap PixmapFromHICON(HICON icon)
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{
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HDC screenDevice = GetDC(0);
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HDC hdc = CreateCompatibleDC(screenDevice);
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ReleaseDC(0, screenDevice);
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ICONINFO iconinfo;
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const bool result = GetIconInfo(icon, &iconinfo); // x and y Hotspot describes the icon center
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if (!result)
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{
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qErrnoWarning("QPixmap::fromWinHICON(), failed to GetIconInfo()");
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DeleteDC(hdc);
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return QPixmap();
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}
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const int w = iconinfo.xHotspot * 2;
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const int h = iconinfo.yHotspot * 2;
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BITMAPINFO bitmapInfo = GetBMI(w, h, false);
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DWORD* bits;
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HBITMAP winBitmap = CreateDIBSection(hdc, &bitmapInfo, DIB_RGB_COLORS, (VOID**)&bits, NULL, 0);
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HGDIOBJ oldhdc = reinterpret_cast<HBITMAP>(SelectObject(hdc, winBitmap));
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DrawIconEx(hdc, 0, 0, icon, iconinfo.xHotspot * 2, iconinfo.yHotspot * 2, 0, 0, DI_NORMAL);
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QImage image(w, h, QImage::Format_ARGB32_Premultiplied);
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if (image.isNull())
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return {};
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BITMAPINFO bmi = GetBMI(w, h, true);
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QScopedArrayPointer<uchar> data(new uchar[bmi.bmiHeader.biSizeImage]);
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if (!GetDIBits(hdc, winBitmap, 0, h, data.data(), &bmi, DIB_RGB_COLORS))
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return {};
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for (int y = 0; y < image.height(); ++y)
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{
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void* dest = static_cast<void*>(image.scanLine(y));
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const void* src = data.data() + y * image.bytesPerLine();
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memcpy(dest, src, image.bytesPerLine());
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}
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// dispose resources created by iconinfo call
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DeleteObject(iconinfo.hbmMask);
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DeleteObject(iconinfo.hbmColor);
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SelectObject(hdc, oldhdc); // restore state
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DeleteObject(winBitmap);
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DeleteDC(hdc);
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return QPixmap::fromImage(image);
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}
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QIcon WinIconHelper::GetNativeIcon()
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{
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QIcon icon;
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for (int size : {16, 32, 48, 256})
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{
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HANDLE h = LoadImageW(GetModuleHandleW(nullptr), L"\"DOLPHIN\"", IMAGE_ICON, size, size,
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LR_CREATEDIBSECTION);
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if (h && h != INVALID_HANDLE_VALUE)
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{
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auto* icon_handle = static_cast<HICON>(h);
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icon.addPixmap(PixmapFromHICON(icon_handle));
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}
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}
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return icon;
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}
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#endif
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