Reworked the X11 part of glutSetCursor, fixing bug #764187 (Variable mouse
pointers don't work) on the way:
* Use slightly more compatible cursor shapes for GLUT_CURSOR_RIGHT_ARROW
and GLUT_CURSOR_LEFT_ARROW.
* Refactored and fixed the erroneous code for GLUT_CURSOR_NONE.
* Removed the incorrect use of XFreeCursor and use a cache of cursors
instead. Cursors are never freed now, we could do this e.g. via
reference countig if this is really needed.
* Fixed error handling.
* Unknown cursor types are an error now.
* Now the window state always corresponds to the wanted cursorID, even in
the case of GLUT_CURSOR_FULL_CROSSHAIR.
NOTE: I am not sure where the cursor cache should really reside, currently it
is simply a file-local variable.
git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@560 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
spanne
parent
1aa0b5ccf6
commit
ac2e30aecd
@ -905,3 +905,16 @@ a bit to do that.
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(235) Fixed part of bug #926883 (Video mode matching code, memory leaks,
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fullscreen), i.e. issue warnings when XF86VidModeFOO fails.
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(236) Reworked the X11 part of glutSetCursor, fixing bug #764187 (Variable
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mouse pointers don't work) on the way:
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* Use slightly more compatible cursor shapes for GLUT_CURSOR_RIGHT_ARROW
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and GLUT_CURSOR_LEFT_ARROW.
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* Refactored and fixed the erroneous code for GLUT_CURSOR_NONE.
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* Removed the incorrect use of XFreeCursor and use a cache of cursors
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instead. Cursors are never freed now, we could do this e.g. via
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reference countig if this is really needed.
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* Fixed error handling.
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* Unknown cursor types are an error now.
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* Now the window state always corresponds to the wanted cursorID, even in
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the case of GLUT_CURSOR_FULL_CROSSHAIR.
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@ -43,34 +43,64 @@
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/* -- INTERNAL FUNCTIONS --------------------------------------------------- */
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#if TARGET_HOST_UNIX_X11
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static int fghGetCursorError( Cursor cursor )
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/*
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* A factory method for an empty cursor
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*/
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static Cursor getEmptyCursor( void )
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{
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int ret = 0;
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char buf[ 256 ];
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switch( cursor )
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{
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case BadAlloc:
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case BadFont:
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case BadMatch:
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case BadPixmap:
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case BadValue:
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XGetErrorText( fgDisplay.Display, cursor, buf, sizeof buf );
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fgWarning( "Error in setting cursor:\n %s.", buf );
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ret = cursor;
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break;
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default:
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/* no error */
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break;
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static Cursor cursorNone = None;
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if( cursorNone == None ) {
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char cursorNoneBits[ 32 ];
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XColor dontCare;
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Pixmap cursorNonePixmap;
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memset( cursorNoneBits, 0, sizeof( cursorNoneBits ) );
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memset( &dontCare, 0, sizeof( dontCare ) );
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cursorNonePixmap = XCreateBitmapFromData ( fgDisplay.Display,
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fgDisplay.RootWindow,
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cursorNoneBits, 16, 16 );
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if( cursorNonePixmap != None ) {
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cursorNone = XCreatePixmapCursor( fgDisplay.Display,
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cursorNonePixmap, cursorNonePixmap,
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&dontCare, &dontCare, 0, 0 );
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XFreePixmap( fgDisplay.Display, cursorNonePixmap );
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}
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return ret;
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}
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return cursorNone;
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}
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#endif
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typedef struct tag_cursorCacheEntry cursorCacheEntry;
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struct tag_cursorCacheEntry {
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unsigned int cursorShape; /* an XC_foo value */
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Cursor cachedCursor; /* None if the corresponding cursor has
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not been created yet */
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};
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/*
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* Note: The arrangement of the table below depends on the fact that
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* the "normal" GLUT_CURSOR_* values start a 0 and are consecutive.
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*/
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static cursorCacheEntry cursorCache[] = {
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{ XC_arrow, None }, /* GLUT_CURSOR_RIGHT_ARROW */
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{ XC_top_left_arrow, None }, /* GLUT_CURSOR_LEFT_ARROW */
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{ XC_hand1, None }, /* GLUT_CURSOR_INFO */
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{ XC_pirate, None }, /* GLUT_CURSOR_DESTROY */
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{ XC_question_arrow, None }, /* GLUT_CURSOR_HELP */
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{ XC_exchange, None }, /* GLUT_CURSOR_CYCLE */
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{ XC_spraycan, None }, /* GLUT_CURSOR_SPRAY */
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{ XC_watch, None }, /* GLUT_CURSOR_WAIT */
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{ XC_xterm, None }, /* GLUT_CURSOR_TEXT */
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{ XC_crosshair, None }, /* GLUT_CURSOR_CROSSHAIR */
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{ XC_sb_v_double_arrow, None }, /* GLUT_CURSOR_UP_DOWN */
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{ XC_sb_h_double_arrow, None }, /* GLUT_CURSOR_LEFT_RIGHT */
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{ XC_top_side, None }, /* GLUT_CURSOR_TOP_SIDE */
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{ XC_bottom_side, None }, /* GLUT_CURSOR_BOTTOM_SIDE */
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{ XC_left_side, None }, /* GLUT_CURSOR_LEFT_SIDE */
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{ XC_right_side, None }, /* GLUT_CURSOR_RIGHT_SIDE */
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{ XC_top_left_corner, None }, /* GLUT_CURSOR_TOP_LEFT_CORNER */
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{ XC_top_right_corner, None }, /* GLUT_CURSOR_TOP_RIGHT_CORNER */
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{ XC_bottom_right_corner, None }, /* GLUT_CURSOR_BOTTOM_RIGHT_CORNER */
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{ XC_bottom_left_corner, None } /* GLUT_CURSOR_BOTTOM_LEFT_CORNER */
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};
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/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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@ -83,103 +113,46 @@ void FGAPIENTRY glutSetCursor( int cursorID )
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FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetCursor" );
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#if TARGET_HOST_UNIX_X11
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{
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Cursor cursor;
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/*
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* Open issues:
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* (a) Partial error checking. Is that a problem?
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* Is fghGetCursorError() correct? Should we abort on errors?
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* Should there be a freeglut-wide X error handler? Should
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* we use the X error-handler mechanism?
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* (b) FULL_CROSSHAIR demotes to plain CROSSHAIR. Old GLUT allows
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* XXX FULL_CROSSHAIR demotes to plain CROSSHAIR. Old GLUT allows
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* for this, but if there is a system that easily supports a full-
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* window (or full-screen) crosshair, we might consider it.
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* (c) Out-of-range cursor-types generate warnings. Should we abort?
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*/
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{
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Cursor cursor = None;
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Pixmap no_cursor = None ; /* Used for GLUT_CURSOR_NONE */
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int error = 0;
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int cursorIDToUse =
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( cursorID == GLUT_CURSOR_FULL_CROSSHAIR ) ? GLUT_CURSOR_CROSSHAIR : cursorID;
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#define MAP_CURSOR(a,b) \
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case a: \
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cursor = XCreateFontCursor( fgDisplay.Display, b ); \
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break;
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if( GLUT_CURSOR_FULL_CROSSHAIR == cursorID )
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cursorID = GLUT_CURSOR_CROSSHAIR;
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switch( cursorID )
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{
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MAP_CURSOR( GLUT_CURSOR_RIGHT_ARROW, XC_right_ptr);
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MAP_CURSOR( GLUT_CURSOR_LEFT_ARROW, XC_left_ptr);
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MAP_CURSOR( GLUT_CURSOR_INFO, XC_hand1);
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MAP_CURSOR( GLUT_CURSOR_DESTROY, XC_pirate);
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MAP_CURSOR( GLUT_CURSOR_HELP, XC_question_arrow);
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MAP_CURSOR( GLUT_CURSOR_CYCLE, XC_exchange);
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MAP_CURSOR( GLUT_CURSOR_SPRAY, XC_spraycan);
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MAP_CURSOR( GLUT_CURSOR_WAIT, XC_watch);
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MAP_CURSOR( GLUT_CURSOR_TEXT, XC_xterm);
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MAP_CURSOR( GLUT_CURSOR_CROSSHAIR, XC_crosshair);
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MAP_CURSOR( GLUT_CURSOR_UP_DOWN, XC_sb_v_double_arrow);
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MAP_CURSOR( GLUT_CURSOR_LEFT_RIGHT, XC_sb_h_double_arrow);
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MAP_CURSOR( GLUT_CURSOR_TOP_SIDE, XC_top_side);
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_SIDE, XC_bottom_side);
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MAP_CURSOR( GLUT_CURSOR_LEFT_SIDE, XC_left_side);
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MAP_CURSOR( GLUT_CURSOR_RIGHT_SIDE, XC_right_side);
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MAP_CURSOR( GLUT_CURSOR_TOP_LEFT_CORNER, XC_top_left_corner);
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MAP_CURSOR( GLUT_CURSOR_TOP_RIGHT_CORNER, XC_top_right_corner);
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_RIGHT_CORNER,
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XC_bottom_right_corner);
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_LEFT_CORNER, XC_bottom_left_corner);
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/* MAP_CURSOR( GLUT_CURSOR_NONE, XC_bogosity); */
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case GLUT_CURSOR_NONE:
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{
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/*
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* Note that we *never* change {no_cursor_bits} from anything
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* but all-zeros. It is our image and mask. We also apparently
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* need to pick a color for foreground/background---but what
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* one we pick doesn't matter for GLUT_CURSOR_NONE.
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*/
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static char no_cursor_bits[ 32 ];
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XColor black;
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no_cursor = XCreatePixmapFromBitmapData( fgDisplay.Display,
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fgDisplay.RootWindow,
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no_cursor_bits,
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16, 16,
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1, 0, 1 );
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XParseColor( fgDisplay.Display,
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DefaultColormap( fgDisplay.Display,
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DefaultScreen( fgDisplay.Display ) ),
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"black",
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&black );
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cursor = XCreatePixmapCursor( fgDisplay.Display,
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no_cursor, no_cursor,
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&black, &black,
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0, 0 );
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break;
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if( ( cursorIDToUse >= 0 ) &&
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( cursorIDToUse < sizeof( cursorCache ) / sizeof( cursorCache[0] ) ) ) {
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cursorCacheEntry *entry = &cursorCache[ cursorIDToUse ];
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if( entry->cachedCursor == None ) {
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entry->cachedCursor =
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XCreateFontCursor( fgDisplay.Display, entry->cursorShape );
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}
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cursor = entry->cachedCursor;
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} else {
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switch( cursorIDToUse )
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{
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case GLUT_CURSOR_NONE:
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cursor = getEmptyCursor( );
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break;
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case GLUT_CURSOR_INHERIT:
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cursor = None;
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break;
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default:
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fgWarning( "Unknown cursor type: %d", cursorID );
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fgError( "Unknown cursor type: %d", cursorIDToUse );
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return;
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}
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}
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error = fghGetCursorError( cursor );
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if( GLUT_CURSOR_INHERIT == cursorID )
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XUndefineCursor( fgDisplay.Display,
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fgStructure.Window->Window.Handle );
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else
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{
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if ( ( cursorIDToUse != GLUT_CURSOR_NONE ) && ( cursor == None ) ) {
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fgError( "Failed to create cursor" );
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}
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XDefineCursor( fgDisplay.Display,
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fgStructure.Window->Window.Handle, cursor );
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XFreeCursor( fgDisplay.Display, cursor );
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if( GLUT_CURSOR_NONE == cursorID )
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XFreePixmap( fgDisplay.Display, no_cursor );
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}
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}
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#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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@ -244,7 +217,8 @@ void FGAPIENTRY glutWarpPointer( int x, int y )
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0, 0, 0, 0,
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x, y
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);
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XFlush( fgDisplay.Display ); /* XXX Is this really necessary? */
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/* Make the warp visible immediately. */
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XFlush( fgDisplay.Display );
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#elif TARGET_HOST_WIN32 || TARGET_HOST_WINCE
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