app/gtk_util.h

// Copyright (c) 2010 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 APP_GTK_UTIL_H_
#define APP_GTK_UTIL_H_
#pragma once

#include <stdint.h>

typedef struct _GtkWidget GtkWidget;

namespace gtk_util {

// Calculates the size of given widget based on the size specified in
// number of characters/lines (in locale specific resource file) and
// font metrics.
// NOTE: Make sure to realize |widget| before using this method, or a
// default font size will be used instead of the actual font size.
void GetWidgetSizeFromResources(
    GtkWidget* widget, int width_chars, int height_lines,
    int* width, int* height);

// As above, but uses number of characters/lines directly rather than looking
// up a resource.
void GetWidgetSizeFromCharacters(
    GtkWidget* widget, double width_chars, double height_lines,
    int* width, int* height);

// Returns the approximate number of characters that can horizontally
// fit in |pixel_width| pixels.
int GetCharacterWidthForPixels(GtkWidget* widget, int pixel_width);

// A helper function for gtk_message_dialog_new() to work around a KDE 3
// window manager bugs. You should always call it after creating a dialog
// with gtk_message_dialog_new.
void ApplyMessageDialogQuirks(GtkWidget* dialog);

// Makes a copy of |pixels| with the ordering changed from BGRA to RGBA.
// The caller is responsible for free()ing the data. If |stride| is 0,
// it's assumed to be 4 * |width|.
uint8_t* BGRAToRGBA(const uint8_t* pixels, int width, int height, int stride);

}  // namespace gtk_util

#endif  // APP_GTK_UTIL_H_