1/* 2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#include "config.h" 27#include "FrameWin.h" 28 29#include <windows.h> 30 31#include "BitmapInfo.h" 32#include "FrameView.h" 33#include "GraphicsContext.h" 34#include "Settings.h" 35 36#include <CoreGraphics/CoreGraphics.h> 37 38using std::min; 39 40namespace WebCore { 41 42static void drawRectIntoContext(IntRect rect, FrameView* view, GraphicsContext* gc) 43{ 44 IntSize offset = view->scrollOffset(); 45 rect.move(-offset.width(), -offset.height()); 46 rect = view->convertToContainingWindow(rect); 47 48 gc->concatCTM(AffineTransform().translate(-rect.x(), -rect.y())); 49 50 view->paint(gc, rect); 51} 52 53static HBITMAP imageFromRect(const Frame* frame, IntRect& ir) 54{ 55 PaintBehavior oldPaintBehavior = frame->view()->paintBehavior(); 56 frame->view()->setPaintBehavior(oldPaintBehavior | PaintBehaviorFlattenCompositingLayers); 57 58 void* bits; 59 HDC hdc = CreateCompatibleDC(0); 60 int w = ir.width(); 61 int h = ir.height(); 62 BitmapInfo bmp = BitmapInfo::create(IntSize(w, h)); 63 64 HBITMAP hbmp = CreateDIBSection(0, &bmp, DIB_RGB_COLORS, static_cast<void**>(&bits), 0, 0); 65 HBITMAP hbmpOld = static_cast<HBITMAP>(SelectObject(hdc, hbmp)); 66 CGColorSpaceRef deviceRGB = CGColorSpaceCreateDeviceRGB(); 67 CGContextRef context = CGBitmapContextCreate(static_cast<void*>(bits), w, h, 68 8, w * sizeof(RGBQUAD), deviceRGB, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); 69 CGColorSpaceRelease(deviceRGB); 70 CGContextSaveGState(context); 71 72 GraphicsContext gc(context); 73 74 drawRectIntoContext(ir, frame->view(), &gc); 75 76 CGContextRelease(context); 77 SelectObject(hdc, hbmpOld); 78 DeleteDC(hdc); 79 80 frame->view()->setPaintBehavior(oldPaintBehavior); 81 82 return hbmp; 83} 84 85HBITMAP imageFromSelection(Frame* frame, bool forceBlackText) 86{ 87 frame->document()->updateLayout(); 88 89 frame->view()->setPaintBehavior(PaintBehaviorSelectionOnly | (forceBlackText ? PaintBehaviorForceBlackText : 0)); 90 FloatRect fr = frame->selectionBounds(); 91 IntRect ir(static_cast<int>(fr.x()), static_cast<int>(fr.y()), 92 static_cast<int>(fr.width()), static_cast<int>(fr.height())); 93 HBITMAP image = imageFromRect(frame, ir); 94 frame->view()->setPaintBehavior(PaintBehaviorNormal); 95 return image; 96} 97 98HBITMAP Frame::nodeImage(Node* node) const 99{ 100 RenderObject* renderer = node->renderer(); 101 if (!renderer) 102 return 0; 103 104 IntRect topLevelRect; 105 IntRect paintingRect = renderer->paintingRootRect(topLevelRect); 106 107 document()->updateLayout(); 108 109 m_view->setNodeToDraw(node); // invoke special sub-tree drawing mode 110 HBITMAP result = imageFromRect(this, paintingRect); 111 m_view->setNodeToDraw(0); 112 113 return result; 114} 115 116} // namespace WebCore 117