void TextRenderGdi::Lock() {
CrashIf(hdcGfxLocked);
Region r;
Status st = gfx->GetClip(&r); // must call before GetHDC(), which locks gfx
CrashIf(st != Ok);
HRGN hrgn = r.GetHRGN(gfx);
hdcGfxLocked = gfx->GetHDC();
SelectClipRgn(hdcGfxLocked, hrgn);
DeleteObject(hrgn);
SelectFont(hdcGfxLocked, currFont);
::SetTextColor(hdcGfxLocked, textColor.ToCOLORREF());
::SetBkColor(hdcGfxLocked, textBgColor.ToCOLORREF());
}
bool LayeredWnd::EnableGlass(Gdiplus::Bitmap *mask) {
if (mask == NULL) {
return false;
}
/* Disable for Windows 8+ */
if (IsWindows8OrGreater()) {
return false;
}
/* Disable for Windows XP */
if (IsWindowsXPOrGreater() == true && IsWindowsVistaOrGreater() == false) {
return false;
}
_glassMask = mask;
using namespace Gdiplus;
ARGB searchArgb = 0xFF000000;
unsigned int height = _glassMask->GetHeight();
unsigned int width = _glassMask->GetWidth();
Region glassRegion;
glassRegion.MakeEmpty();
bool match = false;
/* One row of pixels is scanned at a time, so the height is 1. */
Rect rec(0, 0, 0, 1);
for (unsigned int y = 0; y < height; ++y) {
for (unsigned int x = 0; x < width; ++x) {
Color pixelColor;
_glassMask->GetPixel(x, y, &pixelColor);
ARGB pixelArgb = pixelColor.GetValue();
if (searchArgb == pixelArgb && (x + 1 != width)) {
if (match) {
continue;
}
match = true;
rec.X = x;
rec.Y = y;
} else if (match) {
/* Reached the end of a matching line */
match = false;
rec.Width = x - rec.X;
glassRegion.Union(rec);
}
}
}
DWM_BLURBEHIND blurBehind = { 0 };
blurBehind.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
blurBehind.fEnable = TRUE;
Graphics g(_glassMask);
blurBehind.hRgnBlur = glassRegion.GetHRGN(&g);
HRESULT hr = DwmEnableBlurBehindWindow(Window::Handle(), &blurBehind);
return SUCCEEDED(hr);
}
