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/*
* Copyright (C) 2012-2016 Igalia S.L.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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.
*/
#include "config.h"
#include "AcceleratedSurfaceX11.h"
#if USE(REDIRECTED_XCOMPOSITE_WINDOW)
#include "WebPage.h"
#include <WebCore/PlatformDisplayX11.h>
#include <WebCore/RefPtrCairo.h>
#include <X11/Xlib.h>
#include <X11/extensions/Xcomposite.h>
#include <cairo-xlib.h>
#include <gdk/gdkx.h>
#include <wtf/RunLoop.h>
using namespace WebCore;
namespace WebKit {
std::unique_ptr<AcceleratedSurfaceX11> AcceleratedSurfaceX11::create(WebPage& webPage)
{
if (!downcast<PlatformDisplayX11>(PlatformDisplay::sharedDisplay()).supportsXComposite())
return nullptr;
return std::unique_ptr<AcceleratedSurfaceX11>(new AcceleratedSurfaceX11(webPage));
}
static GdkVisual* defaultVisual()
{
if (GdkVisual* visual = gdk_screen_get_rgba_visual(gdk_screen_get_default()))
return visual;
return gdk_screen_get_system_visual(gdk_screen_get_default());
}
AcceleratedSurfaceX11::AcceleratedSurfaceX11(WebPage& webPage)
: AcceleratedSurface(webPage)
, m_display(downcast<PlatformDisplayX11>(PlatformDisplay::sharedDisplay()).native())
{
Screen* screen = DefaultScreenOfDisplay(m_display);
ASSERT(downcast<PlatformDisplayX11>(PlatformDisplay::sharedDisplay()).native() == m_display);
GdkVisual* visual = defaultVisual();
XUniqueColormap colormap(XCreateColormap(m_display, RootWindowOfScreen(screen), GDK_VISUAL_XVISUAL(visual), AllocNone));
XSetWindowAttributes windowAttributes;
windowAttributes.override_redirect = True;
windowAttributes.colormap = colormap.get();
// CWBorderPixel must be present when the depth doesn't match the parent's one.
// See http://cgit.freedesktop.org/xorg/xserver/tree/dix/window.c?id=xorg-server-1.16.0#n703.
windowAttributes.border_pixel = 0;
m_parentWindow = XCreateWindow(m_display,
RootWindowOfScreen(screen),
-1, -1, 1, 1,
0,
gdk_visual_get_depth(visual),
InputOutput,
GDK_VISUAL_XVISUAL(visual),
CWOverrideRedirect | CWColormap | CWBorderPixel,
&windowAttributes);
XMapWindow(m_display, m_parentWindow.get());
windowAttributes.event_mask = StructureNotifyMask;
windowAttributes.override_redirect = False;
// Create the window of at last 1x1 since X doesn't allow to create empty windows.
m_window = XCreateWindow(m_display,
m_parentWindow.get(),
0, 0,
std::max(1, m_size.width()),
std::max(1, m_size.height()),
0,
CopyFromParent,
InputOutput,
CopyFromParent,
CWEventMask,
&windowAttributes);
XMapWindow(m_display, m_window.get());
while (1) {
XEvent event;
XWindowEvent(m_display, m_window.get(), StructureNotifyMask, &event);
if (event.type == MapNotify && event.xmap.window == m_window.get())
break;
}
XSelectInput(m_display, m_window.get(), NoEventMask);
XCompositeRedirectWindow(m_display, m_window.get(), CompositeRedirectManual);
createPixmap();
}
AcceleratedSurfaceX11::~AcceleratedSurfaceX11()
{
ASSERT(m_display);
ASSERT(m_window);
ASSERT(m_parentWindow);
// Explicitly reset these because we need to ensure it happens in this order.
m_window.reset();
m_parentWindow.reset();
}
void AcceleratedSurfaceX11::createPixmap()
{
m_pixmap = XCompositeNameWindowPixmap(m_display, m_window.get());
RefPtr<cairo_surface_t> surface = adoptRef(cairo_xlib_surface_create(m_display, m_pixmap.get(), GDK_VISUAL_XVISUAL(defaultVisual()), m_size.width(), m_size.height()));
RefPtr<cairo_t> cr = adoptRef(cairo_create(surface.get()));
cairo_set_operator(cr.get(), CAIRO_OPERATOR_CLEAR);
cairo_paint(cr.get());
XSync(m_display, False);
}
bool AcceleratedSurfaceX11::resize(const IntSize& size)
{
if (!AcceleratedSurface::resize(size))
return false;
// Resize the window to at last 1x1 since X doesn't allow to create empty windows.
XResizeWindow(m_display, m_window.get(), std::max(1, m_size.width()), std::max(1, m_size.height()));
XFlush(m_display);
// Release the previous pixmap later to give some time to the UI process to update.
RunLoop::main().dispatchAfter(std::chrono::seconds(5), [pixmap = WTFMove(m_pixmap)] { });
createPixmap();
return true;
}
} // namespace WebCore
#endif // USE(REDIRECTED_XCOMPOSITE_WINDOW)
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