pass width and height information through to cef paint callback

components/compositing/compositor.rs

@@ -1292,6 +1292,8 @@ impl<Window: WindowMethods> IOCompositor<Window> {
         if !self.context.is_some() {
             return None
         }
+        let (width, height) =
+            (self.window_size.width.get() as usize, self.window_size.height.get() as usize);
         if !self.window.prepare_for_composite(width, height) {
             return None
         }
@@ -1305,9 +1307,6 @@ impl<Window: WindowMethods> IOCompositor<Window> {
             _ => {}
         }
 
-        let (width, height) =
-            (self.window_size.width.get() as usize, self.window_size.height.get() as usize);
-
         let (framebuffer_ids, texture_ids) = match target {
             CompositeTarget::Window => (vec!(), vec!()),
             _ => initialize_png(width, height)

components/compositing/windowing.rs

@@ -123,7 +123,7 @@ pub trait WindowMethods {
     /// Requests that the window system prepare a composite. Typically this will involve making
     /// some type of platform-specific graphics context current. Returns true if the composite may
     /// proceed and false if it should not.
-    fn prepare_for_composite(&self) -> bool;
+    fn prepare_for_composite(&self, width: usize, height: usize) -> bool;
 
     /// Sets the cursor to be used in the window.
     fn set_cursor(&self, cursor: Cursor);

ports/cef/render_handler.rs

@@ -8,12 +8,12 @@ use types::cef_paint_element_type_t::PET_VIEW;
 use std::ptr;
 
 pub trait CefRenderHandlerExtensions {
-    fn paint(&self, browser: CefBrowser);
+    fn paint(&self, browser: CefBrowser, width: usize, height: usize);
 }
 
 impl CefRenderHandlerExtensions for CefRenderHandler {
-    fn paint(&self, browser: CefBrowser) {
-        self.on_paint(browser, PET_VIEW, 0, ptr::null(), &mut (), 0, 0)
+    fn paint(&self, browser: CefBrowser, width: usize, height: usize) {
+        self.on_paint(browser, PET_VIEW, 0, ptr::null(), &mut (), width as i32, height as i32)
     }
 }
 

ports/cef/window.rs

@@ -253,12 +253,12 @@ impl WindowMethods for Window {
          box receiver as Box<CompositorReceiver>)
     }
 
-    fn prepare_for_composite(&self) -> bool {
+    fn prepare_for_composite(&self, width: usize, height: usize) -> bool {
         let browser = self.cef_browser.borrow();
         match *browser {
             None => {}
             Some(ref browser) => {
-                browser.get_host().get_client().get_render_handler().paint(browser.clone());
+                browser.get_host().get_client().get_render_handler().paint(browser.clone(), width, height);
             }
         }
         true

ports/glutin/window.rs

@@ -550,7 +550,7 @@ impl WindowMethods for Window {
         self.window.set_cursor(glutin_cursor);
     }
 
-    fn prepare_for_composite(&self) -> bool {
+    fn prepare_for_composite(&self, _width: usize, _height: usize) -> bool {
         true
     }
 

ports/gonk/src/window.rs

@@ -818,7 +818,7 @@ impl WindowMethods for Window {
     fn set_cursor(&self, _: Cursor) {
     }
 
-    fn prepare_for_composite(&self) -> bool {
+    fn prepare_for_composite(&self, _width: usize, _height: usize) -> bool {
         true
     }
 }