1 dawes 3.13 /* $XFree86: xc/programs/Xserver/hw/xfree86/common/xf86Cursor.c,v 3.12 1996/08/23 11:03:15 dawes Exp $ */
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2 dawes 3.5 /*
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3 dawes 1.1 * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
4 *
5 * Permission to use, copy, modify, distribute, and sell this software and its
6 * documentation for any purpose is hereby granted without fee, provided that
7 * the above copyright notice appear in all copies and that both that
8 * copyright notice and this permission notice appear in supporting
9 * documentation, and that the name of Thomas Roell not be used in
10 * advertising or publicity pertaining to distribution of the software without
11 * specific, written prior permission. Thomas Roell makes no representations
12 * about the suitability of this software for any purpose. It is provided
13 * "as is" without express or implied warranty.
14 *
15 * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
16 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
17 * EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
18 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
19 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
20 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
21 * PERFORMANCE OF THIS SOFTWARE.
22 *
23 */
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24 dawes 3.13 /* $XConsortium: xf86Cursor.c /main/10 1996/10/19 17:58:23 kaleb $ */
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25 dawes 1.1
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26 dawes 3.11 #define NEED_EVENTS
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27 dawes 1.1 #include "X.h"
28 #include "Xmd.h"
29 #include "input.h"
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30 dawes 3.10 #include "cursor.h"
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31 dawes 1.1 #include "mipointer.h"
32 #include "scrnintstr.h"
33
34 #include "compiler.h"
35
36 #include "xf86.h"
37 #include "xf86Procs.h"
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38 dawes 3.8 #ifdef XFreeXDGA
39 #include "Xproto.h"
40 #include "extnsionst.h"
41 #include "scrnintstr.h"
42 #include "servermd.h"
43
44 #define _XF86DGA_SERVER_
45 #include "extensions/xf86dgastr.h"
46 #endif
47
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48 dawes 3.11 #ifdef XINPUT
49 #include "xf86_Config.h"
50 #include "XIproto.h"
51 #include "xf86Xinput.h"
52 #endif
53
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54 dawes 1.1 /* #include "atKeynames.h" -hv- dont need that include here */
55
56
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57 dawes 3.11 static Bool xf86CursorOffScreen(
58 #if NeedFunctionPrototypes
59 ScreenPtr *pScreen,
60 int *x,
61 int *y
62 #endif
63 );
64 static void xf86CrossScreen(
65 #if NeedFunctionPrototypes
66 ScreenPtr pScreen,
67 Bool entering
68 #endif
69 );
70 static void xf86WrapCursor(
71 #if NeedFunctionPrototypes
72 ScreenPtr pScreen,
73 int x,
74 int y
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75 dawes 3.7 #endif
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76 dawes 3.11 );
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77 dawes 1.1
78 miPointerScreenFuncRec xf86PointerScreenFuncs = {
79 xf86CursorOffScreen,
80 xf86CrossScreen,
81 xf86WrapCursor,
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82 dawes 3.7 #ifdef XINPUT
83 xf86eqEnqueue,
84 #endif
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85 dawes 1.1 };
86
87
88
89 /*
90 * xf86InitViewport --
91 * Initialize paning & zooming parameters, so that a driver must only
92 * check what resolutions are possible and whether the virtual area
93 * is valid if specifyed.
94 */
95
96 void
97 xf86InitViewport(pScr)
98 ScrnInfoPtr pScr;
99 {
100 /*
101 * Compute the initial Viewport if necessary
102 */
103 if (pScr->frameX0 < 0)
104 {
105 pScr->frameX0 = (pScr->virtualX - pScr->modes->HDisplay) / 2;
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106 dawes 3.3 pScr->frameY0 = (pScr->virtualY - pScr->modes->VDisplay) / 2;
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107 dawes 1.1 }
108 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
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109 dawes 3.3 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
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110 dawes 1.1
111 /*
112 * Now adjust the initial Viewport, so it lies within the virtual area
113 */
114 if (pScr->frameX1 >= pScr->virtualX)
115 {
116 pScr->frameX0 = pScr->virtualX - pScr->modes->HDisplay;
117 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
118 }
119
120 if (pScr->frameY1 >= pScr->virtualY)
121 {
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122 dawes 3.3 pScr->frameY0 = pScr->virtualY - pScr->modes->VDisplay;
123 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
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124 dawes 1.1 }
125 }
126
127
128 /*
129 * xf86SetViewport --
130 * Scroll the visual part of the screen so the pointer is visible.
131 */
132
133 void
134 xf86SetViewport(pScreen, x, y)
135 ScreenPtr pScreen;
136 int x, y;
137 {
138 Bool frameChanged = FALSE;
139 ScrnInfoPtr pScr = XF86SCRNINFO(pScreen);
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140 dawes 3.0
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141 dawes 1.1 /*
142 * check wether (x,y) belongs to the visual part of the screen
143 * if not, change the base of the displayed frame accoring
144 */
145 if ( pScr->frameX0 > x) {
146 pScr->frameX0 = x;
147 pScr->frameX1 = x + pScr->modes->HDisplay - 1;
148 frameChanged = TRUE ;
149 }
150
151 if ( pScr->frameX1 < x) {
152 pScr->frameX1 = x + 1;
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153 dawes 3.12 pScr->frameX0 = x - pScr->modes->HDisplay + 1;
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154 dawes 1.1 frameChanged = TRUE ;
155 }
156
157 if ( pScr->frameY0 > y) {
158 pScr->frameY0 = y;
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159 dawes 3.3 pScr->frameY1 = y + pScr->modes->VDisplay - 1;
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160 dawes 1.1 frameChanged = TRUE;
161 }
162
163 if ( pScr->frameY1 < y) {
164 pScr->frameY1 = y;
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165 dawes 3.3 pScr->frameY0 = y - pScr->modes->VDisplay + 1;
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166 dawes 1.1 frameChanged = TRUE;
167 }
168
169 if (frameChanged) (pScr->AdjustFrame)(pScr->frameX0, pScr->frameY0);
170 }
171
172
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173 dawes 3.6 static Bool xf86ZoomLocked = FALSE;
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174 dawes 1.1
175 /*
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176 dawes 3.6 * xf86LockZoom --
177 * Enable/disable ZoomViewport
178 */
179
180 void
181 xf86LockZoom (pScreen, lock)
182 ScreenPtr pScreen;
183 Bool lock;
184 {
185 /*
186 * pScreen is currently ignored, but may be used later to enable locking
187 * of individual screens.
188 */
189
190 xf86ZoomLocked = lock;
191 }
192
193 /*
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194 dawes 1.1 * xf86ZoomViewport --
195 * Reinitialize the visual part of the screen for another modes->
196 */
197
198 void
199 xf86ZoomViewport (pScreen, zoom)
200 ScreenPtr pScreen;
201 int zoom;
202 {
203 ScrnInfoPtr pScr = XF86SCRNINFO(pScreen);
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204 dawes 3.6
205 if (xf86ZoomLocked)
206 return;
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207 dawes 3.8
208 #ifdef XFreeXDGA
209 /*
210 * We should really send the mode change request to the DGA client and let
211 * it decide what to do. For now just bin the request
212 */
213 if (((ScrnInfoPtr)(xf86Info.currentScreen->devPrivates[xf86ScreenIndex].ptr))->directMode&XF86DGADirectGraphics)
214 return;
215 #endif
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216 dawes 1.1
217 if (pScr->modes != pScr->modes->next)
218 {
219 pScr->modes = zoom > 0 ? pScr->modes->next : pScr->modes->prev;
220
221 if ((pScr->SwitchMode)(pScr->modes))
222 {
223 /*
224 * adjust new frame for the displaysize
225 */
226 pScr->frameX0 = (pScr->frameX1 + pScr->frameX0 -pScr->modes->HDisplay)/2;
227 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
228
229 if (pScr->frameX0 < 0)
230 {
231 pScr->frameX0 = 0;
232 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
233 }
234 else if (pScr->frameX1 >= pScr->virtualX)
235 {
236 pScr->frameX0 = pScr->virtualX - pScr->modes->HDisplay;
237 dawes 1.1 pScr->frameX1 = pScr->frameX0 + pScr->modes->HDisplay - 1;
238 }
239
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240 dawes 3.3 pScr->frameY0 = (pScr->frameY1 + pScr->frameY0 - pScr->modes->VDisplay)/2;
241 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
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242 dawes 1.1
243 if (pScr->frameY0 < 0)
244 {
245 pScr->frameY0 = 0;
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246 dawes 3.3 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
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247 dawes 1.1 }
248 else if (pScr->frameY1 >= pScr->virtualY)
249 {
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250 dawes 3.3 pScr->frameY0 = pScr->virtualY - pScr->modes->VDisplay;
251 pScr->frameY1 = pScr->frameY0 + pScr->modes->VDisplay - 1;
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252 dawes 1.1 }
253 }
254 else /* switch failed, so go back to old mode */
255 pScr->modes = zoom > 0 ? pScr->modes->prev : pScr->modes->next;
256 }
257
258 (pScr->AdjustFrame)(pScr->frameX0, pScr->frameY0);
259 }
260
261
262
263 /*
264 * xf86CursorOffScreen --
265 * Check whether it is necessary to switch to another screen
266 */
267
268 /* ARGSUSED */
269 static Bool
270 xf86CursorOffScreen (pScreen, x, y)
271 ScreenPtr *pScreen;
272 int *x, *y;
273 dawes 1.1 {
274 int i;
275
276 if ((screenInfo.numScreens > 1) && ((*x < 0) || ((*pScreen)->width <= *x))) {
277 i = (*pScreen)->myNum;
278 if (*x < 0) {
279 i = (i ? i : screenInfo.numScreens) -1;
280 *pScreen = screenInfo.screens[i];
281 *x += (*pScreen)->width;
282 }
283 else {
284 *x -= (*pScreen)->width;
285 i = (i+1) % screenInfo.numScreens;
286 *pScreen = screenInfo.screens[i];
287 }
288 return(TRUE);
289 }
290 return(FALSE);
291 }
292
293
294 dawes 1.1
295 /*
296 * xf86CrossScreen --
297 * Switch to another screen
298 */
299
300 /* ARGSUSED */
301 static void
302 xf86CrossScreen (pScreen, entering)
303 ScreenPtr pScreen;
304 Bool entering;
305 {
306 if (xf86Info.sharedMonitor)
307 (XF86SCRNINFO(pScreen)->EnterLeaveMonitor)(entering);
308 (XF86SCRNINFO(pScreen)->EnterLeaveCursor)(entering);
309 }
310
311
312 /*
313 * xf86WrapCursor --
314 * Wrap possible to another screen
315 dawes 1.1 */
316
317 /* ARGSUSED */
318 static void
319 xf86WrapCursor (pScreen, x, y)
320 ScreenPtr pScreen;
321 int x,y;
322 {
323 miPointerWarpCursor(pScreen,x,y);
324
325 xf86Info.currentScreen = pScreen;
326 }
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