CursorWin.cpp revision 2bde8e466a4451c7319e3a072d118917957d6554 
1/*
2 * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
3 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "config.h"
28#include "Cursor.h"
29
30#include "BitmapInfo.h"
31#include "Image.h"
32#include "IntPoint.h"
33#include "SystemInfo.h"
34
35#include <wtf/OwnPtr.h>
36
37#include <windows.h>
38
39#define ALPHA_CURSORS
40
41namespace WebCore {
42
43static PassRefPtr<SharedCursor> createSharedCursor(Image* img, const IntPoint& hotSpot)
44{
45    RefPtr<SharedCursor> impl;
46
47    IntPoint effectiveHotSpot = determineHotSpot(img, hotSpot);
48    static bool doAlpha = windowsVersion() >= WindowsXP;
49    BitmapInfo cursorImage = BitmapInfo::create(IntSize(img->width(), img->height()));
50
51    HDC dc = GetDC(0);
52    HDC workingDC = CreateCompatibleDC(dc);
53    if (doAlpha) {
54        OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, (BITMAPINFO *)&cursorImage, DIB_RGB_COLORS, 0, 0, 0));
55        ASSERT(hCursor);
56
57        img->getHBITMAP(hCursor.get());
58        HBITMAP hOldBitmap = (HBITMAP)SelectObject(workingDC, hCursor.get());
59        SetBkMode(workingDC, TRANSPARENT);
60        SelectObject(workingDC, hOldBitmap);
61
62        Vector<unsigned char, 128> maskBits;
63        maskBits.fill(0xff, (img->width() + 7) / 8 * img->height());
64        OwnPtr<HBITMAP> hMask(CreateBitmap(img->width(), img->height(), 1, 1, maskBits.data()));
65
66        ICONINFO ii;
67        ii.fIcon = FALSE;
68        ii.xHotspot = effectiveHotSpot.x();
69        ii.yHotspot = effectiveHotSpot.y();
70        ii.hbmMask = hMask.get();
71        ii.hbmColor = hCursor.get();
72
73        impl = SharedCursor::create(CreateIconIndirect(&ii));
74    } else {
75        // Platform doesn't support alpha blended cursors, so we need
76        // to create the mask manually
77        HDC andMaskDC = CreateCompatibleDC(dc);
78        HDC xorMaskDC = CreateCompatibleDC(dc);
79        OwnPtr<HBITMAP> hCursor(CreateDIBSection(dc, &cursorImage, DIB_RGB_COLORS, 0, 0, 0));
80        ASSERT(hCursor);
81        img->getHBITMAP(hCursor.get());
82        BITMAP cursor;
83        GetObject(hCursor.get(), sizeof(BITMAP), &cursor);
84        OwnPtr<HBITMAP> andMask(CreateBitmap(cursor.bmWidth, cursor.bmHeight, 1, 1, NULL));
85        OwnPtr<HBITMAP> xorMask(CreateCompatibleBitmap(dc, cursor.bmWidth, cursor.bmHeight));
86        HBITMAP oldCursor = (HBITMAP)SelectObject(workingDC, hCursor.get());
87        HBITMAP oldAndMask = (HBITMAP)SelectObject(andMaskDC, andMask.get());
88        HBITMAP oldXorMask = (HBITMAP)SelectObject(xorMaskDC, xorMask.get());
89
90        SetBkColor(workingDC, RGB(0,0,0));
91        BitBlt(andMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0, 0, SRCCOPY);
92
93        SetBkColor(xorMaskDC, RGB(255, 255, 255));
94        SetTextColor(xorMaskDC, RGB(255, 255, 255));
95        BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, andMaskDC, 0, 0, SRCCOPY);
96        BitBlt(xorMaskDC, 0, 0, cursor.bmWidth, cursor.bmHeight, workingDC, 0,0, SRCAND);
97
98        SelectObject(workingDC, oldCursor);
99        SelectObject(andMaskDC, oldAndMask);
100        SelectObject(xorMaskDC, oldXorMask);
101
102        ICONINFO icon = {0};
103        icon.fIcon = FALSE;
104        icon.xHotspot = effectiveHotSpot.x();
105        icon.yHotspot = effectiveHotSpot.y();
106        icon.hbmMask = andMask.get();
107        icon.hbmColor = xorMask.get();
108        impl = SharedCursor::create(CreateIconIndirect(&icon));
109
110        DeleteDC(xorMaskDC);
111        DeleteDC(andMaskDC);
112    }
113    DeleteDC(workingDC);
114    ReleaseDC(0, dc);
115
116    return impl.release();
117}
118
119static PassRefPtr<SharedCursor> loadSharedCursor(HINSTANCE hInstance, LPCWSTR lpCursorName)
120{
121    return SharedCursor::create(::LoadCursorW(hInstance, lpCursorName));
122}
123
124static PassRefPtr<SharedCursor> loadCursorByName(char* name, int x, int y)
125{
126    IntPoint hotSpot(x, y);
127    RefPtr<Image> cursorImage(Image::loadPlatformResource(name));
128    if (cursorImage && !cursorImage->isNull())
129        return createSharedCursor(cursorImage.get(), hotSpot);
130    return loadSharedCursor(0, IDC_ARROW);
131}
132
133void Cursor::ensurePlatformCursor() const
134{
135    if (m_platformCursor)
136        return;
137
138    switch (m_type) {
139    case Cursor::Pointer:
140    case Cursor::Cell:
141    case Cursor::ContextMenu:
142    case Cursor::Alias:
143    case Cursor::Copy:
144    case Cursor::None:
145    case Cursor::Grab:
146    case Cursor::Grabbing:
147        m_platformCursor = loadSharedCursor(0, IDC_ARROW);
148        break;
149    case Cursor::Cross:
150        m_platformCursor = loadSharedCursor(0, IDC_CROSS);
151        break;
152    case Cursor::Hand:
153        m_platformCursor = loadSharedCursor(0, IDC_HAND);
154        break;
155    case Cursor::IBeam:
156        m_platformCursor = loadSharedCursor(0, IDC_IBEAM);
157        break;
158    case Cursor::Wait:
159        m_platformCursor = loadSharedCursor(0, IDC_WAIT);
160        break;
161    case Cursor::Help:
162        m_platformCursor = loadSharedCursor(0, IDC_HELP);
163        break;
164    case Cursor::Move:
165        m_platformCursor = loadSharedCursor(0, IDC_SIZEALL);
166        break;
167    case Cursor::MiddlePanning:
168        m_platformCursor = loadCursorByName("panIcon", 8, 8);
169        break;
170    case Cursor::EastResize:
171        m_platformCursor = loadSharedCursor(0, IDC_SIZEWE);
172        break;
173    case Cursor::EastPanning:
174        m_platformCursor = loadCursorByName("panEastCursor", 7, 7);
175        break;
176    case Cursor::NorthResize:
177        m_platformCursor = loadSharedCursor(0, IDC_SIZENS);
178        break;
179    case Cursor::NorthPanning:
180        m_platformCursor = loadCursorByName("panNorthCursor", 7, 7);
181        break;
182    case Cursor::NorthEastResize:
183        m_platformCursor = loadSharedCursor(0, IDC_SIZENESW);
184        break;
185    case Cursor::NorthEastPanning:
186        m_platformCursor = loadCursorByName("panNorthEastCursor", 7, 7);
187        break;
188    case Cursor::NorthWestResize:
189        m_platformCursor = loadSharedCursor(0, IDC_SIZENWSE);
190        break;
191    case Cursor::NorthWestPanning:
192        m_platformCursor = loadCursorByName("panNorthWestCursor", 7, 7);
193        break;
194    case Cursor::SouthResize:
195        m_platformCursor = loadSharedCursor(0, IDC_SIZENS);
196        break;
197    case Cursor::SouthPanning:
198        m_platformCursor = loadCursorByName("panSouthCursor", 7, 7);
199        break;
200    case Cursor::SouthEastResize:
201        m_platformCursor = loadSharedCursor(0, IDC_SIZENWSE);
202        break;
203    case Cursor::SouthEastPanning:
204        m_platformCursor = loadCursorByName("panSouthEastCursor", 7, 7);
205        break;
206    case Cursor::SouthWestResize:
207        m_platformCursor = loadSharedCursor(0, IDC_SIZENESW);
208        break;
209    case Cursor::SouthWestPanning:
210        m_platformCursor = loadCursorByName("panSouthWestCursor", 7, 7);
211        break;
212    case Cursor::WestResize:
213        m_platformCursor = loadSharedCursor(0, IDC_SIZEWE);
214        break;
215    case Cursor::NorthSouthResize:
216        m_platformCursor = loadSharedCursor(0, IDC_SIZENS);
217        break;
218    case Cursor::EastWestResize:
219        m_platformCursor = loadSharedCursor(0, IDC_SIZEWE);
220        break;
221    case Cursor::WestPanning:
222        m_platformCursor = loadCursorByName("panWestCursor", 7, 7);
223        break;
224    case Cursor::NorthEastSouthWestResize:
225        m_platformCursor = loadSharedCursor(0, IDC_SIZENESW);
226        break;
227    case Cursor::NorthWestSouthEastResize:
228        m_platformCursor = loadSharedCursor(0, IDC_SIZENWSE);
229        break;
230    case Cursor::ColumnResize:
231        // FIXME: Windows does not have a standard column resize cursor <rdar://problem/5018591>
232        m_platformCursor = loadSharedCursor(0, IDC_SIZEWE);
233        break;
234    case Cursor::RowResize:
235        // FIXME: Windows does not have a standard row resize cursor <rdar://problem/5018591>
236        m_platformCursor = loadSharedCursor(0, IDC_SIZENS);
237        break;
238    case Cursor::VerticalText:
239        m_platformCursor = loadCursorByName("verticalTextCursor", 7, 7);
240        break;
241    case Cursor::Progress:
242        m_platformCursor = loadSharedCursor(0, IDC_APPSTARTING);
243        break;
244    case Cursor::NoDrop:
245        break;
246    case Cursor::NotAllowed:
247        m_platformCursor = loadSharedCursor(0, IDC_NO);
248        break;
249    case Cursor::ZoomIn:
250        m_platformCursor = loadCursorByName("zoomInCursor", 7, 7);
251        break;
252    case Cursor::ZoomOut:
253        m_platformCursor = loadCursorByName("zoomOutCursor", 7, 7);
254        break;
255    case Cursor::Custom:
256        m_platformCursor = createSharedCursor(m_image.get(), m_hotSpot);
257        break;
258    }
259}
260
261SharedCursor::~SharedCursor()
262{
263    DestroyIcon(m_nativeCursor);
264}
265
266Cursor::Cursor(const Cursor& other)
267    : m_type(other.m_type)
268    , m_image(other.m_image)
269    , m_hotSpot(other.m_hotSpot)
270    , m_platformCursor(other.m_platformCursor)
271{
272}
273
274Cursor& Cursor::operator=(const Cursor& other)
275{
276    m_type = other.m_type;
277    m_image = other.m_image;
278    m_hotSpot = other.m_hotSpot;
279    m_platformCursor = other.m_platformCursor;
280    return *this;
281}
282
283Cursor::~Cursor()
284{
285}
286
287} // namespace WebCore
288