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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_BROWSER_GTK_NINE_BOX_H_
#define CHROME_BROWSER_GTK_NINE_BOX_H_
#include <gdk-pixbuf/gdk-pixbuf.h>
// A NineBox manages a set of source images representing a 3x3 grid, where
// non-corner images can be tiled to make a larger image. It's used to
// use bitmaps for constructing image-based resizable widgets like buttons.
//
// If you want just a vertical image that stretches in height but is fixed
// in width, only pass in images for the left column (leave others NULL).
// Similarly, for a horizontal image that stretches in width but is fixed in
// height, only pass in images for the top row.
//
// TODO(port): add support for caching server-side pixmaps of prerendered
// nineboxes.
class NineBox {
public:
// Construct a NineBox with nine images. NULL images are allowed.
// Takes ownership of each image, but not the |images| array.
NineBox(GdkPixbuf* images[9]);
~NineBox();
// Render the NineBox to dst.
// Expects dst to already be the proper size.
void RenderToPixbuf(GdkPixbuf* dst);
// Render the top row of images to dst between x1 and x2.
// This is split from RenderToPixbuf so the toolbar can use it.
void RenderTopCenterStrip(GdkPixbuf* dst, int x1, int x2);
private:
// Repeatedly stamp src across dst.
void TileImage(GdkPixbuf* src, GdkPixbuf* dst,
int x1, int y1, int x2, int y2);
GdkPixbuf* images_[9];
};
#endif // CHROME_BROWSER_GTK_NINE_BOX_H_
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