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
41 namespace WebCore {
42
createSharedCursor(Image * img,const IntPoint & hotSpot)43 static 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
loadSharedCursor(HINSTANCE hInstance,LPCWSTR lpCursorName)119 static PassRefPtr<SharedCursor> loadSharedCursor(HINSTANCE hInstance, LPCWSTR lpCursorName)
120 {
121 return SharedCursor::create(::LoadCursorW(hInstance, lpCursorName));
122 }
123
loadCursorByName(char * name,int x,int y)124 static 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
ensurePlatformCursor() const133 void 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
~SharedCursor()261 SharedCursor::~SharedCursor()
262 {
263 DestroyIcon(m_nativeCursor);
264 }
265
Cursor(const Cursor & other)266 Cursor::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
operator =(const Cursor & other)274 Cursor& 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
~Cursor()283 Cursor::~Cursor()
284 {
285 }
286
287 } // namespace WebCore
288