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Implement off-screen rendering support using delegated rendering (issue #1257).

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This implementation supports both GPU compositing and software compositing (used when GPU is not supported or when passing `--disable-gpu --disable-gpu-compositing` command-line flags). GPU-accelerated features (WebGL and 3D CSS) that did not work with the previous off-screen rendering implementation do work with this implementation when GPU support is available.

Rendering now operates on a per-frame basis. The frame rate is configurable via CefBrowserSettings.windowless_frame_rate up to a maximum of 60fps (potentially limited by how fast the system can generate new frames). CEF generates a bitmap from the compositor backing and passes it to CefRenderHandler::OnPaint.

The previous CefRenderHandler/CefBrowserHost API for off-screen rendering has been restored mostly as-is with some minor changes:

- CefBrowserHost::Invalidate no longer accepts a CefRect region argument. Instead of invalidating a specific region it now triggers generation of a new frame.
- The |dirtyRects| argument to CefRenderHandler::OnPaint will now always be a single CefRect representing the whole view (frame) size. Previously, invalidated regions were listed separately.
- Linux: CefBrowserHost::SendKeyEvent now expects X11 event information instead of GTK event information. See cefclient for an example of converting GTK events to the necessary format.
- Sizes passed to the CefRenderHandler OnPaint and OnPopupSize methods are now already DPI scaled. Previously, the client had to perform DPI scaling.
- Includes drag&drop implementation from issue #1032.
- Includes unit test fixes from issue #1245.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@1751 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
This commit is contained in:
Marshall Greenblatt
2014-06-30 22:30:29 +00:00
parent 133317eeec
commit dea4daffd7
106 changed files with 13053 additions and 176 deletions
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21
include/internal/cef_linux.h
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@ -72,6 +72,7 @@ class CefCriticalSection {
#define CefCursorHandle cef_cursor_handle_t
#define CefEventHandle cef_event_handle_t
#define CefWindowHandle cef_window_handle_t
#define CefTextInputContext cef_text_input_context_t
struct CefMainArgsTraits {
typedef cef_main_args_t struct_type;
@ -113,6 +114,8 @@ struct CefWindowInfoTraits {
target->width = src->width;
target->height = src->height;
target->parent_window = src->parent_window;
target->windowless_rendering_enabled = src->windowless_rendering_enabled;
target->transparent_painting_enabled = src->transparent_painting_enabled;
target->window = src->window;
}
};
@ -137,6 +140,24 @@ class CefWindowInfo : public CefStructBase<CefWindowInfoTraits> {
width = windowRect.width;
height = windowRect.height;
}
///
// Create the browser using windowless (off-screen) rendering. No window
// will be created for the browser and all rendering will occur via the
// CefRenderHandler interface. The |parent| value will be used to identify
// monitor info and to act as the parent window for dialogs, context menus,
// etc. If |parent| is not provided then the main screen monitor will be used
// and some functionality that requires a parent window may not function
// correctly. If |transparent| is true a transparent background color will be
// used (RGBA=0x00000000). If |transparent| is false the background will be
// white and opaque. In order to create windowless browsers the
// CefSettings.windowless_rendering_enabled value must be set to true.
///
void SetAsWindowless(CefWindowHandle parent, bool transparent) {
windowless_rendering_enabled = true;
parent_window = parent;
transparent_painting_enabled = transparent;
}
};
#endif // OS_LINUX