/*

 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.

 *

 * 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 COMPUTER, 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 COMPUTER, 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 "FrameWin.h"

#include <windows.h>

#include "BitmapInfo.h"

#include "FrameView.h"

#include "GraphicsContext.h"

#include "Settings.h"

#include <CoreGraphics/CoreGraphics.h>

using std::min;

namespace WebCore {

static void drawRectIntoContext(IntRect rect, FrameView* view, GraphicsContext* gc)

{

    IntSize offset = view->scrollOffset();

    rect.move(-offset.width(), -offset.height());

    rect = view->convertToContainingWindow(rect);

    gc->concatCTM(AffineTransform().translate(-rect.x(), -rect.y()));

    view->paint(gc, rect);

}

static HBITMAP imageFromRect(const Frame* frame, IntRect& ir)

{

    PaintBehavior oldPaintBehavior = frame->view()->paintBehavior();

    frame->view()->setPaintBehavior(oldPaintBehavior | PaintBehaviorFlattenCompositingLayers);

    void* bits;

    HDC hdc = CreateCompatibleDC(0);

    int w = ir.width();

    int h = ir.height();

    BitmapInfo bmp = BitmapInfo::create(IntSize(w, h));

    HBITMAP hbmp = CreateDIBSection(0, &bmp, DIB_RGB_COLORS, static_cast<void**>(&bits), 0, 0);

    HBITMAP hbmpOld = static_cast<HBITMAP>(SelectObject(hdc, hbmp));

    CGColorSpaceRef deviceRGB = CGColorSpaceCreateDeviceRGB();

    CGContextRef context = CGBitmapContextCreate(static_cast<void*>(bits), w, h,

        8, w * sizeof(RGBQUAD), deviceRGB, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);

    CGColorSpaceRelease(deviceRGB);

    CGContextSaveGState(context);

    GraphicsContext gc(context);

    drawRectIntoContext(ir, frame->view(), &gc);

    CGContextRelease(context);

    SelectObject(hdc, hbmpOld);

    DeleteDC(hdc);

    frame->view()->setPaintBehavior(oldPaintBehavior);

    return hbmp;

}

HBITMAP imageFromSelection(Frame* frame, bool forceBlackText)

{

    frame->document()->updateLayout();

    frame->view()->setPaintBehavior(PaintBehaviorSelectionOnly | (forceBlackText ? PaintBehaviorForceBlackText : 0));

    FloatRect fr = frame->selectionBounds();

    IntRect ir(static_cast<int>(fr.x()), static_cast<int>(fr.y()),

               static_cast<int>(fr.width()), static_cast<int>(fr.height()));

    HBITMAP image = imageFromRect(frame, ir);

    frame->view()->setPaintBehavior(PaintBehaviorNormal);

    return image;

}

HBITMAP Frame::nodeImage(Node* node) const

{

    RenderObject* renderer = node->renderer();

    if (!renderer)

        return 0;

    IntRect topLevelRect;

    IntRect paintingRect = renderer->paintingRootRect(topLevelRect);

    document()->updateLayout();

    m_view->setNodeToDraw(node); // invoke special sub-tree drawing mode

    HBITMAP result = imageFromRect(this, paintingRect);

    m_view->setNodeToDraw(0);

    return result;

}

} // namespace WebCore