static PassRefPtr<SharedCursor> createSharedCursor(Image* img, const IntPoint& hotSpot)
{
RefPtr<SharedCursor> impl;
IntPoint effectiveHotSpot = determineHotSpot(img, hotSpot);
static bool doAlpha = supportsAlphaCursors();
BitmapInfo cursorImage = BitmapInfo::create(IntSize(img->width(), img->height()));
HDC dc = GetDC(0);
HDC workingDC = CreateCompatibleDC(dc);
if (doAlpha) {
OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, (BITMAPINFO *)&cursorImage, DIB_RGB_COLORS, 0, 0, 0));
ASSERT(hCursor);
img->getHBITMAP(hCursor.get());
HBITMAP hOldBitmap = (HBITMAP)SelectObject(workingDC, hCursor.get());
SetBkMode(workingDC, TRANSPARENT);
SelectObject(workingDC, hOldBitmap);
Vector<unsigned char, 128> maskBits;
maskBits.fill(0xff, (img->width() + 7) / 8 * img->height());
OwnPtr<HBITMAP> hMask(CreateBitmap(img->width(), img->height(), 1, 1, maskBits.data()));
ICONINFO ii;
ii.fIcon = FALSE;
ii.xHotspot = effectiveHotSpot.x();
ii.yHotspot = effectiveHotSpot.y();
ii.hbmMask = hMask.get();
ii.hbmColor = hCursor.get();
impl = SharedCursor::create(CreateIconIndirect(&ii));
} else {
// Platform doesn't support alpha blended cursors, so we need
// to create the mask manually
HDC andMaskDC = CreateCompatibleDC(dc);
HDC xorMaskDC = CreateCompatibleDC(dc);
OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, &cursorImage, DIB_RGB_COLORS, 0, 0, 0));
ASSERT(hCursor);
img->getHBITMAP(hCursor.get());
BITMAP cursor;
GetObject(hCursor.get(), sizeof(BITMAP), &cursor);
OwnPtr<HBITMAP> andMask(CreateBitmap(cursor.bmWidth, cursor.bmHeight, 1, 1, NULL));
OwnPtr<HBITMAP> xorMask(CreateCompatibleBitmap(dc, cursor.bmWidth, cursor.bmHeight));
HBITMAP oldCursor = (HBITMAP)SelectObject(workingDC, hCursor.get());
HBITMAP oldAndMask = (HBITMAP)SelectObject(andMaskDC, andMask.get());
HBITMAP oldXorMask = (HBITMAP)SelectObject(xorMaskDC, xorMask.get());
SetBkColor(workingDC, RGB(0,0,0));
BitBlt(andMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0, 0, SRCCOPY);
SetBkColor(xorMaskDC, RGB(255, 255, 255));
SetTextColor(xorMaskDC, RGB(255, 255, 255));
BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, andMaskDC, 0, 0, SRCCOPY);
BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0,0, SRCAND);
SelectObject(workingDC, oldCursor);
SelectObject(andMaskDC, oldAndMask);
SelectObject(xorMaskDC, oldXorMask);
ICONINFO icon = {0};
icon.fIcon = FALSE;
icon.xHotspot = effectiveHotSpot.x();
icon.yHotspot = effectiveHotSpot.y();
icon.hbmMask = andMask.get();
icon.hbmColor = xorMask.get();
impl = SharedCursor::create(CreateIconIndirect(&icon));
DeleteDC(xorMaskDC);
DeleteDC(andMaskDC);
}
DeleteDC(workingDC);
ReleaseDC(0, dc);
return impl.release();
}
Cursor::Cursor(Image* img, const IntPoint& hotspot)
{
static bool doAlpha = supportsAlphaCursors();
BITMAPINFO cursorImage = {0};
cursorImage.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
cursorImage.bmiHeader.biWidth = img->width();
cursorImage.bmiHeader.biHeight = img->height();
cursorImage.bmiHeader.biPlanes = 1;
cursorImage.bmiHeader.biBitCount = 32;
cursorImage.bmiHeader.biCompression = BI_RGB;
HDC dc = GetDC(0);
HDC workingDC = CreateCompatibleDC(dc);
if (doAlpha) {
OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, (BITMAPINFO *)&cursorImage, DIB_RGB_COLORS, 0, 0, 0));
ASSERT(hCursor);
img->getHBITMAP(hCursor.get());
HBITMAP hOldBitmap = (HBITMAP)SelectObject(workingDC, hCursor.get());
SetBkMode(workingDC, TRANSPARENT);
SelectObject(workingDC, hOldBitmap);
OwnPtr<HBITMAP> hMask(CreateBitmap(img->width(), img->height(), 1, 1, NULL));
ICONINFO ii;
ii.fIcon = FALSE;
ii.xHotspot = hotspot.x();
ii.yHotspot = hotspot.y();
ii.hbmMask = hMask.get();
ii.hbmColor = hCursor.get();
m_impl = new SharedCursor(CreateIconIndirect(&ii));
} else {
// Platform doesn't support alpha blended cursors, so we need
// to create the mask manually
HDC andMaskDC = CreateCompatibleDC(dc);
HDC xorMaskDC = CreateCompatibleDC(dc);
OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, &cursorImage, DIB_RGB_COLORS, 0, 0, 0));
ASSERT(hCursor);
img->getHBITMAP(hCursor.get());
BITMAP cursor;
GetObject(hCursor.get(), sizeof(BITMAP), &cursor);
OwnPtr<HBITMAP> andMask(CreateBitmap(cursor.bmWidth, cursor.bmHeight, 1, 1, NULL));
OwnPtr<HBITMAP> xorMask(CreateCompatibleBitmap(dc, cursor.bmWidth, cursor.bmHeight));
HBITMAP oldCursor = (HBITMAP)SelectObject(workingDC, hCursor.get());
HBITMAP oldAndMask = (HBITMAP)SelectObject(andMaskDC, andMask.get());
HBITMAP oldXorMask = (HBITMAP)SelectObject(xorMaskDC, xorMask.get());
SetBkColor(workingDC, RGB(0,0,0));
BitBlt(andMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0, 0, SRCCOPY);
SetBkColor(xorMaskDC, RGB(255, 255, 255));
SetTextColor(xorMaskDC, RGB(255, 255, 255));
BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, andMaskDC, 0, 0, SRCCOPY);
BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0,0, SRCAND);
SelectObject(workingDC, oldCursor);
SelectObject(andMaskDC, oldAndMask);
SelectObject(xorMaskDC, oldXorMask);
ICONINFO icon = {0};
icon.fIcon = FALSE;
icon.xHotspot = hotspot.x();
icon.yHotspot = hotspot.y();
icon.hbmMask = andMask.get();
icon.hbmColor = xorMask.get();
m_impl = new SharedCursor(CreateIconIndirect(&icon));
DeleteDC(xorMaskDC);
DeleteDC(andMaskDC);
}
DeleteDC(workingDC);
ReleaseDC(0, dc);
}