Windows: Add off-screen rendering support (issue #518).

- Popup menus, drag&drop and GPU acceleration are not currently supported.
- Testing is enabled in cefclient by passing the "off-screen-rendering-enabled" command-line flag.

git-svn-id: https://chromiumembedded.googlecode.com/svn/trunk@919 5089003a-bbd8-11dd-ad1f-f1f9622dbc98

include/capi/cef_browser_capi.h

@@ -290,6 +290,69 @@ typedef struct _cef_browser_host_t {
       enum cef_file_dialog_mode_t mode, const cef_string_t* title,
       const cef_string_t* default_file_name, cef_string_list_t accept_types,
       struct _cef_run_file_dialog_callback_t* callback);
+
+  ///
+  // Returns true (1) if window rendering is disabled.
+  ///
+  int (CEF_CALLBACK *is_window_rendering_disabled)(
+      struct _cef_browser_host_t* self);
+
+  ///
+  // Notify the browser that the widget has been resized. The browser will first
+  // call cef_render_handler_t::GetViewRect to get the new size and then call
+  // cef_render_handler_t::OnPaint asynchronously with the updated regions. This
+  // function is only used when window rendering is disabled.
+  ///
+  void (CEF_CALLBACK *was_resized)(struct _cef_browser_host_t* self);
+
+  ///
+  // Invalidate the |dirtyRect| region of the view. The browser will call
+  // cef_render_handler_t::OnPaint asynchronously with the updated regions. This
+  // function is only used when window rendering is disabled.
+  ///
+  void (CEF_CALLBACK *invalidate)(struct _cef_browser_host_t* self,
+      const cef_rect_t* dirtyRect);
+
+  ///
+  // Send a key event to the browser.
+  ///
+  void (CEF_CALLBACK *send_key_event)(struct _cef_browser_host_t* self,
+      const struct _cef_key_event_t* event);
+
+  ///
+  // Send a mouse click event to the browser. The |x| and |y| coordinates are
+  // relative to the upper-left corner of the view.
+  ///
+  void (CEF_CALLBACK *send_mouse_click_event)(struct _cef_browser_host_t* self,
+      int x, int y, enum cef_mouse_button_type_t type, int mouseUp,
+      int clickCount);
+
+  ///
+  // Send a mouse move event to the browser. The |x| and |y| coordinates are
+  // relative to the upper-left corner of the view.
+  ///
+  void (CEF_CALLBACK *send_mouse_move_event)(struct _cef_browser_host_t* self,
+      int x, int y, int mouseLeave);
+
+  ///
+  // Send a mouse wheel event to the browser. The |x| and |y| coordinates are
+  // relative to the upper-left corner of the view. The |deltaX| and |deltaY|
+  // values represent the movement delta in the X and Y directions respectively.
+  ///
+  void (CEF_CALLBACK *send_mouse_wheel_event)(struct _cef_browser_host_t* self,
+      int x, int y, int deltaX, int deltaY);
+
+  ///
+  // Send a focus event to the browser.
+  ///
+  void (CEF_CALLBACK *send_focus_event)(struct _cef_browser_host_t* self,
+      int setFocus);
+
+  ///
+  // Send a capture lost event to the browser.
+  ///
+  void (CEF_CALLBACK *send_capture_lost_event)(
+      struct _cef_browser_host_t* self);
 } cef_browser_host_t;
 
 

include/capi/cef_client_capi.h

@@ -119,6 +119,12 @@ typedef struct _cef_client_t {
   struct _cef_load_handler_t* (CEF_CALLBACK *get_load_handler)(
       struct _cef_client_t* self);
 
+  ///
+  // Return the handler for off-screen rendering events.
+  ///
+  struct _cef_render_handler_t* (CEF_CALLBACK *get_render_handler)(
+      struct _cef_client_t* self);
+
   ///
   // Return the handler for browser request events.
   ///

include/capi/cef_display_handler_capi.h

@@ -80,7 +80,8 @@ typedef struct _cef_display_handler_t {
   // text that will be displayed in the tooltip. To handle the display of the
   // tooltip yourself return true (1). Otherwise, you can optionally modify
   // |text| and then return false (0) to allow the browser to display the
-  // tooltip.
+  // tooltip. When window rendering is disabled the application is responsible
+  // for drawing tooltips and the return value is ignored.
   ///
   int (CEF_CALLBACK *on_tooltip)(struct _cef_display_handler_t* self,
       struct _cef_browser_t* browser, cef_string_t* text);

include/capi/cef_render_handler_capi.h

@@ -0,0 +1,122 @@
+// Copyright (c) 2012 Marshall A. Greenblatt. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the name Chromium Embedded
+// Framework nor the names of its contributors may be used to endorse
+// or promote products derived from this software without specific prior
+// written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// ---------------------------------------------------------------------------
+//
+// This file was generated by the CEF translator tool and should not edited
+// by hand. See the translator.README.txt file in the tools directory for
+// more information.
+//
+
+#ifndef CEF_INCLUDE_CAPI_CEF_RENDER_HANDLER_CAPI_H_
+#define CEF_INCLUDE_CAPI_CEF_RENDER_HANDLER_CAPI_H_
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "include/capi/cef_base_capi.h"
+
+
+///
+// Implement this structure to handle events when window rendering is disabled.
+// The functions of this structure will be called on the UI thread.
+///
+typedef struct _cef_render_handler_t {
+  ///
+  // Base structure.
+  ///
+  cef_base_t base;
+
+  ///
+  // Called to retrieve the root window rectangle in screen coordinates. Return
+  // true (1) if the rectangle was provided. Return false (0) if the screen
+  // rectangle is the same as the view rectangle.
+  ///
+  int (CEF_CALLBACK *get_root_screen_rect)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, cef_rect_t* rect);
+
+  ///
+  // Called to retrieve the view rectangle which is relative to screen
+  // coordinates. Return true (1) if the rectangle was provided.
+  ///
+  int (CEF_CALLBACK *get_view_rect)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, cef_rect_t* rect);
+
+  ///
+  // Called to retrieve the translation from view coordinates to actual screen
+  // coordinates. Return true (1) if the screen coordinates were provided.
+  ///
+  int (CEF_CALLBACK *get_screen_point)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, int viewX, int viewY, int* screenX,
+      int* screenY);
+
+  ///
+  // Called when the browser wants to show or hide the popup widget. The popup
+  // should be shown if |show| is true (1) and hidden if |show| is false (0).
+  // NOTE: Popup widgets are not yet supported.
+  ///
+  void (CEF_CALLBACK *on_popup_show)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, int show);
+
+  ///
+  // Called when the browser wants to move or resize the popup widget. |rect|
+  // contains the new location and size. NOTE: Popup widgets are not yet
+  // supported.
+  ///
+  void (CEF_CALLBACK *on_popup_size)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, const cef_rect_t* rect);
+
+  ///
+  // Called when an element should be painted. |type| indicates whether the
+  // element is the view or the popup widget. |buffer| contains the pixel data
+  // for the whole image. |dirtyRects| contains the set of rectangles that need
+  // to be repainted. On Windows |buffer| will be |width|*|height|*4 bytes in
+  // size and represents a BGRA image with an upper-left origin. NOTE: Popup
+  // widgets are not yet supported.
+  ///
+  void (CEF_CALLBACK *on_paint)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, enum cef_paint_element_type_t type,
+      size_t dirtyRectsCount, cef_rect_t const* dirtyRects, const void* buffer,
+      int width, int height);
+
+  ///
+  // Called when the browser window's cursor has changed.
+  ///
+  void (CEF_CALLBACK *on_cursor_change)(struct _cef_render_handler_t* self,
+      struct _cef_browser_t* browser, cef_cursor_handle_t cursor);
+} cef_render_handler_t;
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif  // CEF_INCLUDE_CAPI_CEF_RENDER_HANDLER_CAPI_H_