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 "GraphicsContextCG.h" 34 #include "Settings.h" 35 36 #include <CoreGraphics/CoreGraphics.h> 37 38 using std::min; 39 40 namespace WebCore { 41 42 static 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 53 static 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 CGContextRef context = CGBitmapContextCreate(static_cast<void*>(bits), w, h, 67 8, w * sizeof(RGBQUAD), deviceRGBColorSpaceRef(), kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst); 68 CGContextSaveGState(context); 69 70 GraphicsContext gc(context); 71 72 drawRectIntoContext(ir, frame->view(), &gc); 73 74 CGContextRelease(context); 75 SelectObject(hdc, hbmpOld); 76 DeleteDC(hdc); 77 78 frame->view()->setPaintBehavior(oldPaintBehavior); 79 80 return hbmp; 81 } 82 83 HBITMAP imageFromSelection(Frame* frame, bool forceBlackText) 84 { 85 frame->document()->updateLayout(); 86 87 frame->view()->setPaintBehavior(PaintBehaviorSelectionOnly | (forceBlackText ? PaintBehaviorForceBlackText : 0)); 88 FloatRect fr = frame->selection()->bounds(); 89 IntRect ir(static_cast<int>(fr.x()), static_cast<int>(fr.y()), 90 static_cast<int>(fr.width()), static_cast<int>(fr.height())); 91 HBITMAP image = imageFromRect(frame, ir); 92 frame->view()->setPaintBehavior(PaintBehaviorNormal); 93 return image; 94 } 95 96 DragImageRef Frame::nodeImage(Node* node) 97 { 98 RenderObject* renderer = node->renderer(); 99 if (!renderer) 100 return 0; 101 102 IntRect topLevelRect; 103 IntRect paintingRect = renderer->paintingRootRect(topLevelRect); 104 105 document()->updateLayout(); 106 107 m_view->setNodeToDraw(node); // invoke special sub-tree drawing mode 108 HBITMAP result = imageFromRect(this, paintingRect); 109 m_view->setNodeToDraw(0); 110 111 return result; 112 } 113 114 } // namespace WebCore 115
