dolphin/Source/Core/DolphinQt/QtUtils/WinIconHelper.cpp

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2018-03-26 06:13:15 +00:00
// Copyright 2018 Dolphin Emulator Project
// Licensed under GPLv2+
// Refer to the license.txt file included.
2018-07-06 22:40:15 +00:00
#include "DolphinQt/QtUtils/WinIconHelper.h"
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#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, NULL, 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