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
drawRectIntoContext(IntRect rect,FrameView * view,GraphicsContext * gc)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
imageFromRect(const Frame * frame,IntRect & ir)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
imageFromSelection(Frame * frame,bool forceBlackText)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
nodeImage(Node * node)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