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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_COMMON_X11_UTIL_H_
#define CHROME_COMMON_X11_UTIL_H_
// This file declares utility functions for X11 (Linux only).
//
// These functions do not require the Xlib headers to be included (which is why
// we use a void* for Visual*). The Xlib headers are highly polluting so we try
// hard to limit their spread into the rest of the code.
typedef struct _GtkWidget GtkWidget;
typedef unsigned long XID;
typedef struct _XDisplay Display;
namespace gfx {
class Size;
}
namespace x11_util {
// These functions cache their results and must be called from the UI thread.
// Currently they don't support multiple screens/displays.
// Return an X11 connection for the current, primary display.
Display* GetXDisplay();
// Return true iff the connection supports X shared memory
bool QuerySharedMemorySupport(Display* dpy);
// Return true iff the display supports Xrender
bool QueryRenderSupport(Display* dpy);
// These functions do not cache their results
// Get the X window id for the default root window
XID GetX11RootWindow();
// Get the X window id for the given GTK widget.
XID GetX11WindowFromGtkWidget(GtkWidget*);
// Get a Visual from the given widget. Since we don't include the Xlib
// headers, this is returned as a void*.
void* GetVisualFromGtkWidget(GtkWidget*);
// Return the number of bits-per-pixel for a pixmap of the given depth
int BitsPerPixelForPixmapDepth(Display*, int depth);
// Return a handle to a server side pixmap. |shared_memory_key| is a SysV
// IPC key. The shared memory region must contain 32-bit pixels.
XID AttachSharedMemory(Display* display, int shared_memory_support);
void DetachSharedMemory(Display* display, XID shmseg);
// Return a handle to an XRender picture where |pixmap| is a handle to a
// pixmap containing Skia ARGB data.
XID CreatePictureFromSkiaPixmap(Display* display, XID pixmap);
void FreePicture(Display* display, XID picture);
void FreePixmap(Display* display, XID pixmap);
};
#endif // CHROME_COMMON_X11_UTIL_H_
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