gmag-events_8c-source.html

在Linux下实现magnification功能

<a name="l00128"></a>00128                         <span class="keywordflow">if</span> (pgmag_win-&gt;attr.map_state == IsViewable) {
<a name="l00129"></a>00129                                 XFixesCopyRegion (
<a name="l00130"></a>00130                                         <a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00131"></a>00131                                         pgmag_win-&gt;clip,
<a name="l00132"></a>00132                                         XFixesCreateRegionFromWindow (
<a name="l00133"></a>00133                                                 dpy_conn,
<a name="l00134"></a>00134                                                 pgmag_win-&gt;<a class="code" href="struct__GmagWin.html#b0296be2f6d865e0ea50ab0b97a06ad5">xwin</a>,
<a name="l00135"></a>00135                                                 WindowRegionBounding));
<a name="l00136"></a>00136                                 XFixesTranslateRegion (
<a name="l00137"></a>00137                                         dpy_conn,
<a name="l00138"></a>00138                                         pgmag_win-&gt;clip, pgmag_win-&gt;attr.x,
<a name="l00139"></a>00139                                         pgmag_win-&gt;attr.y);
<a name="l00140"></a>00140                                 XFixesCopyRegion (
<a name="l00141"></a>00141                                         dpy_conn,
<a name="l00142"></a>00142                                         pgmag_win-&gt;win_region,
<a name="l00143"></a>00143                                         pgmag_win-&gt;clip);
<a name="l00144"></a>00144                                 XFixesSubtractRegion (
<a name="l00145"></a>00145                                         dpy_conn,
<a name="l00146"></a>00146                                         pgmag_win-&gt;clip, pgmag_win-&gt;clip,
<a name="l00147"></a>00147                                         clipSum);
<a name="l00148"></a>00148                                 XFixesUnionRegion (
<a name="l00149"></a>00149                                         dpy_conn,
<a name="l00150"></a>00150                                         clipSum, clipSum,
<a name="l00151"></a>00151                                         pgmag_win-&gt;win_region);
<a name="l00152"></a>00152                         }
<a name="l00153"></a>00153         } <span class="keywordflow">while</span> ((elem = g_list_previous (elem)));
<a name="l00154"></a>00154         XFixesDestroyRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, clipSum);
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156 
<a name="l00157"></a>00157 <span class="comment">/*</span>
<a name="l00158"></a>00158 <span class="comment"> * Calculates the clip of a single window in mag_windows_list.</span>
<a name="l00159"></a>00159 <span class="comment"> */</span>
<a name="l00160"></a>00160 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00161"></a>00161 gmag_events_calculate_window_clip (<a class="code" href="struct__GmagWin.html">GmagWinPtr</a> pgmag_win_newclip)
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163         GList         *elem = NULL;
<a name="l00164"></a>00164         XserverRegion clipSum;
<a name="l00165"></a>00165 
<a name="l00166"></a>00166         clipSum = XFixesCreateRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, 0, 0);
<a name="l00167"></a>00167         elem = g_queue_peek_tail_link (mag_windows_list);
<a name="l00168"></a>00168         <span class="keywordflow">if</span> (!elem) {
<a name="l00169"></a>00169                 XFixesDestroyRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, clipSum);
<a name="l00170"></a>00170                 <span class="keywordflow">return</span>;
<a name="l00171"></a>00171         }
<a name="l00172"></a>00172         <span class="keywordflow">do</span> {
<a name="l00173"></a>00173                 <a class="code" href="struct__GmagWin.html">GmagWinPtr</a> pgmag_win = (<a class="code" href="struct__GmagWin.html">GmagWinPtr</a>) elem-&gt;data;
<a name="l00174"></a>00174                 if (pgmag_win-&gt;<a class="code" href="struct__GmagWin.html#b0296be2f6d865e0ea50ab0b97a06ad5">xwin</a> == pgmag_win_newclip-&gt;<a class="code" href="struct__GmagWin.html#b0296be2f6d865e0ea50ab0b97a06ad5">xwin</a>) {
<a name="l00175"></a>00175                         <span class="comment">/* the window that must have a new clip was founded */</span>
<a name="l00176"></a>00176                         XFixesCopyRegion (
<a name="l00177"></a>00177                                 <a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00178"></a>00178                                 pgmag_win-&gt;clip,
<a name="l00179"></a>00179                                 XFixesCreateRegionFromWindow (
<a name="l00180"></a>00180                                         <a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00181"></a>00181                                         pgmag_win-&gt;<a class="code" href="struct__GmagWin.html#b0296be2f6d865e0ea50ab0b97a06ad5">xwin</a>,
<a name="l00182"></a>00182                                         WindowRegionBounding));
<a name="l00183"></a>00183                         XFixesTranslateRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00184"></a>00184                                                pgmag_win-&gt;clip,
<a name="l00185"></a>00185                                                pgmag_win-&gt;attr.x,
<a name="l00186"></a>00186                                                pgmag_win-&gt;attr.y);
<a name="l00187"></a>00187                         XFixesCopyRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00188"></a>00188                                           pgmag_win-&gt;win_region,
<a name="l00189"></a>00189                                           pgmag_win-&gt;clip);
<a name="l00190"></a>00190                         XFixesSubtractRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00191"></a>00191                                               pgmag_win-&gt;clip, pgmag_win-&gt;clip,
<a name="l00192"></a>00192                                               clipSum);
<a name="l00193"></a>00193                         <span class="keywordflow">break</span>;
<a name="l00194"></a>00194                 }
<a name="l00195"></a>00195                 <span class="keywordflow">if</span> (pgmag_win-&gt;pic)
<a name="l00196"></a>00196                         <span class="keywordflow">if</span> (pgmag_win-&gt;attr.map_state == IsViewable) {
<a name="l00197"></a>00197                                 XFixesUnionRegion (
<a name="l00198"></a>00198                                         <a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00199"></a>00199                                         clipSum, clipSum,
<a name="l00200"></a>00200                                         pgmag_win-&gt;win_region);
<a name="l00201"></a>00201                         }
<a name="l00202"></a>00202         } <span class="keywordflow">while</span> ((elem = g_list_previous (elem)));
<a name="l00203"></a>00203         XFixesDestroyRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, clipSum);
<a name="l00204"></a>00204 }
<a name="l00205"></a>00205 
<a name="l00206"></a>00206 <span class="comment">/*</span>
<a name="l00207"></a>00207 <span class="comment"> * Paint a window. If region is None, the window clip region is painted, else</span>
<a name="l00208"></a>00208 <span class="comment"> * the intersection of the window clip region and region is painted.</span>
<a name="l00209"></a>00209 <span class="comment"> */</span>
<a name="l00210"></a>00210 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00211"></a>00211 gmag_events_paint_window (<a class="code" href="struct__GmagWin.html">GmagWinPtr</a> pgmag_win, XserverRegion region)
<a name="l00212"></a>00212 {
<a name="l00213"></a>00213         <span class="keyword">static</span> XserverRegion final_clip = None;
<a name="l00214"></a>00214 
<a name="l00215"></a>00215         <span class="keywordflow">if</span> (!pgmag_win-&gt;damaged &amp;&amp; !region)
<a name="l00216"></a>00216                 <span class="keywordflow">return</span>;
<a name="l00217"></a>00217         <span class="keywordflow">if</span> (!pgmag_win-&gt;pic)
<a name="l00218"></a>00218                 <span class="keywordflow">return</span>;
<a name="l00219"></a>00219         <span class="keywordflow">if</span> (pgmag_win-&gt;attr.map_state != IsViewable)
<a name="l00220"></a>00220                 <span class="keywordflow">return</span>;
<a name="l00221"></a>00221 
<a name="l00222"></a>00222         <span class="keywordflow">if</span> (!final_clip)
<a name="l00223"></a>00223                 final_clip = XFixesCreateRegion (
<a name="l00224"></a>00224                         <a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, 0, 0);
<a name="l00225"></a>00225 
<a name="l00226"></a>00226         XFixesSetRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, final_clip, 0, 0);
<a name="l00227"></a>00227 
<a name="l00228"></a>00228         <span class="keywordflow">if</span> (region) {
<a name="l00229"></a>00229                 XFixesIntersectRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00230"></a>00230                                        final_clip, region, pgmag_win-&gt;clip);
<a name="l00231"></a>00231                 XFixesSetPictureClipRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00232"></a>00232                                             pgmag_win-&gt;pic,
<a name="l00233"></a>00233                                             -(pgmag_win-&gt;attr.x),
<a name="l00234"></a>00234                                             -(pgmag_win-&gt;attr.y), final_clip);
<a name="l00235"></a>00235         } <span class="keywordflow">else</span>
<a name="l00236"></a>00236                 XFixesSetPictureClipRegion (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>,
<a name="l00237"></a>00237                                             pgmag_win-&gt;pic,
<a name="l00238"></a>00238                                             -(pgmag_win-&gt;attr.x),
<a name="l00239"></a>00239                                             -(pgmag_win-&gt;attr.y),
<a name="l00240"></a>00240                                             pgmag_win-&gt;clip);
<a name="l00241"></a>00241         XRenderComposite (<a class="code" href="gmag-events_8c.html#df636aeb547b62e88302730e4f2bf3ad">dpy_conn</a>, PictOpSrc,
<a name="l00242"></a>00242                           pgmag_win-&gt;pic, None, off_screen_picture,
<a name="l00243"></a>00243                           0, 0, 0, 0, pgmag_win-&gt;attr.x, pgmag_win-&gt;attr.y,
<a name="l00244"></a>00244                           pgmag_win-&gt;attr.width, pgmag_win-&gt;attr.height);
<a name="l00245"></a>00245 }
<a name="l00246"></a>00246 
<a name="l00247"></a>00247 <span class="comment">/*</span>
<a name="l00248"></a>00248 <span class="comment"> * Paint all the windows in mag_windows_list with the specified</span>
<a name="l00249"></a>00249 <span class="comment"> * exposedRegion.</span>
<a name="l00250"></a>00250 <span class="comment"> */</span>
<a name="l00251"></a>00251 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00252"></a>00252 gmag_events_paint_windows (XserverRegion exposedRegion)
<a name="l00253"></a>00253 {
<a name="l00254"></a>00254         GList      *elem;
<a name="l00255"></a>00255         <a class="code" href="struct__GmagWin.html">GmagWinPtr</a>  pgmag_win;
<a name="l00256"></a>00256 
<a name="l00257"></a>00257         elem = g_queue_peek_head_link (mag_windows_list);
<a name="l00258"></a>00258 
<a name="l00259"></a>00259         <span class="keywordflow">while</span> (elem) {
<a name="l00260"></a>00260                 pgmag_win = (<a class="code" href="struct__GmagWin.html">GmagWinPtr</a>) elem-&gt;data;
<a name="l00261"></a>00261                 gmag_events_paint_window (pgmag_win, exposedRegion);
<a name="l00262"></a>00262                 elem = g_list_next (elem);
<a name="l00263"></a>00263         }
<a name="l00264"></a>00264 }
<a name="l00265"></a>00265 
<a name="l00266"></a>00266 <span class="comment">/*</span>
<a name="l00267"></a>00267 <span class="comment"> * Sometimes XGetWindowAttributes fail (when the window is destroied), so we</span>
<a name="l00268"></a>00268 <span class="comment"> * put default values in it to not have problems in other parts of the program.</span>
<a name="l00269"></a>00269 <span class="comment"> * I think that only some ones need to be setted, but this was copied from</span>
<a name="l00270"></a>00270 <span class="comment"> * Compiz, so...</span>
<a name="l00271"></a>00271 <span class="comment"> */</span>
<a name="l00272"></a>00272 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00273"></a>00273 gmag_events_set_default_window_attributes (XWindowAttributes *wa)
<a name="l00274"></a>00274 {
<a name="l00275"></a>00275         wa-&gt;x                     = 0;
<a name="l00276"></a>00276         wa-&gt;y                     = 0;