cef 问题集锦

1. Check failed: !is_bound()

[1225/181834.383:FATAL:receiver.h(159)] Check failed: !is_bound(). Receiver for network.mojom.TrustedHeaderClient is already bound

解决方案: 增加命令行参数

--disable-request-handling-for-testing

2. 部分网页显示乱码

解决方案: 检查语言区域设置是否正确（本例设置为中文）

CefSettings settings;
CefString(&settings.locale).FromWString(L"zh-CN");

3. OSR窗口疯狂点击崩溃

FATAL:event.cc(567)] Check failed : 3 >= click_count(3 vs. 4)

解决方案: SendMouseClickEvent判断点击次数是否大于3，如果大于3则默认为3

browser_host->SendMouseClickEvent(mouse_event, btnType, false,last_click_count_ >=4 ? 3: last_click_count_);

4.OSR背景透明或者锯齿

解决方案: 不使用opengl，改用原始方式UpdateLayeredWindow实现（cef 109 demo基础改）


void DrawBuffer(HDC hDC, RECT rtDest,const void *buf)
{COLORREF* pColors = nullptr;HDC hMemDC = ::CreateCompatibleDC(hDC);HBITMAP hBitMap = CreateRGBA32Bitmap(hDC, rtDest.right - rtDest.left, rtDest.bottom - rtDest.top, &pColors);::SelectObject(hMemDC, hBitMap);int w = rtDest.right - rtDest.left;int h = rtDest.bottom - rtDest.top;memcpy(pColors, buf, (rtDest.right - rtDest.left) * (rtDest.bottom - rtDest.top) * 4);for (int ih = 0; ih < h/2; ++ih){for (int iw = 0; iw < w; ++iw){COLORREF temp = pColors[ih * w + iw];pColors[ih * w + iw] = pColors[(h - 1 - ih) * w + iw];pColors[(h - 1 - ih) * w + iw] = temp;}}BLENDFUNCTION bf = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };AlphaBlend(hDC, rtDest.left, rtDest.top, rtDest.right - rtDest.left, rtDest.bottom - rtDest.top, hMemDC, 0, 0, rtDest.right - rtDest.left, rtDest.bottom - rtDest.top, bf);DeleteObject(hBitMap);DeleteDC(hMemDC);
}void PaintContent(HDC hDc, RECT rcPaint,const void *buf)
{//DrawAColor(hDc, rcPaint, 0xffff0000);DrawBuffer(hDc, rcPaint, buf);
}void OsrRenderHandlerWinGL::OnPaint(CefRefPtr<CefBrowser> browser,CefRenderHandler::PaintElementType type,const CefRenderHandler::RectList& dirtyRects,const void* buffer,int width,int height) {CEF_REQUIRE_UI_THREAD();RECT rtWindow;GetWindowRect(hwnd(), &rtWindow);if (buffer == nullptr || (rtWindow.right - rtWindow.left) != width || (rtWindow.bottom - rtWindow.top) != height){return;}COLORREF* pOffscreenBits = NULL;HDC hdc = GetDC(hwnd());HDC hDcOffscreen = ::CreateCompatibleDC(hdc);HBITMAP hbmpOffscreen = CreateRGBA32Bitmap(hdc, width, height, &pOffscreenBits);HBITMAP hOldBitmap = (HBITMAP) ::SelectObject(hDcOffscreen, hbmpOffscreen);RECT rtPaint = { 0,0,rtWindow.right - rtWindow.left, rtWindow.bottom - rtWindow.top };PaintContent(hDcOffscreen, rtPaint,buffer);BLENDFUNCTION bf = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };SIZE sizeWnd = { rtWindow.right - rtWindow.left, rtWindow.bottom - rtWindow.top };POINT ptPos = { rtWindow.left, rtWindow.top };//::ClientToScreen(hWnd, &ptPos);POINT ptSrc = { 0,0 };UpdateLayeredWindow(hwnd(), hdc, &ptPos, &sizeWnd, hDcOffscreen, &ptSrc, 0, &bf, ULW_ALPHA);DeleteDC(hDcOffscreen);DeleteObject(hbmpOffscreen);ReleaseDC(hwnd(),hdc);if (type == PET_VIEW && !renderer_.popup_rect().IsEmpty()) {painting_popup_ = true;browser->GetHost()->Invalidate(PET_POPUP);painting_popup_ = false;}
}