283 lines
11 KiB
C
283 lines
11 KiB
C
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/*
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* freeglut_cursor.c
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*
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* The mouse cursor related stuff.
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*
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* Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
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* Written by Pawel W. Olszta, <olszta@sourceforge.net>
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* Creation date: Thu Dec 16 1999
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <GL/freeglut.h>
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#include "freeglut_internal.h"
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/*
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* TODO BEFORE THE STABLE RELEASE:
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* glutSetCursor() -- Win32 mappings are incomplete.
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*
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* It would be good to use custom mouse cursor shapes, and introduce
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* an option to display them using glBitmap() and/or texture mapping,
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* apart from the windowing system version.
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*/
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/* -- PRIVATE FUNCTIONS --------------------------------------------------- */
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#if TARGET_HOST_POSIX_X11 || TARGET_HOST_MAC_OSX || TARGET_HOST_SOLARIS
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#include <X11/cursorfont.h>
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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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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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}
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return cursorNone;
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}
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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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static void fghSetCursor ( SFG_Window *window, int cursorID )
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{
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Cursor cursor;
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/*
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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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*/
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int cursorIDToUse =
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( cursorID == GLUT_CURSOR_FULL_CROSSHAIR ) ? GLUT_CURSOR_CROSSHAIR : cursorID;
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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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fgError( "Unknown cursor type: %d", cursorIDToUse );
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return;
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}
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}
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if ( cursorIDToUse == GLUT_CURSOR_INHERIT ) {
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XUndefineCursor( fgDisplay.Display, window->Window.Handle );
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} else if ( cursor != None ) {
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XDefineCursor( fgDisplay.Display, window->Window.Handle, cursor );
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} else if ( cursorIDToUse != GLUT_CURSOR_NONE ) {
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fgError( "Failed to create cursor" );
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}
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}
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static void fghWarpPointer ( int x, int y )
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{
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XWarpPointer(
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fgDisplay.Display,
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None,
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fgStructure.CurrentWindow->Window.Handle,
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0, 0, 0, 0,
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x, y
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);
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/* Make the warp visible immediately. */
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XFlush( fgDisplay.Display );
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}
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#endif
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#if TARGET_HOST_MS_WINDOWS
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static void fghSetCursor ( SFG_Window *window, int cursorID )
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{
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/*
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* Joe Krahn is re-writing the following code.
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*/
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/* Set the cursor AND change it for this window class. */
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#if !defined(__MINGW64__) && _MSC_VER <= 1200
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# define MAP_CURSOR(a,b) \
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case a: \
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SetCursor( LoadCursor( NULL, b ) ); \
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SetClassLong( window->Window.Handle, \
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GCL_HCURSOR, \
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( LONG )LoadCursor( NULL, b ) ); \
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break;
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/* Nuke the cursor AND change it for this window class. */
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# define ZAP_CURSOR(a,b) \
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case a: \
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SetCursor( NULL ); \
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SetClassLong( window->Window.Handle, \
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GCL_HCURSOR, ( LONG )NULL ); \
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break;
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#else
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# define MAP_CURSOR(a,b) \
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case a: \
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SetCursor( LoadCursor( NULL, b ) ); \
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SetClassLongPtr( window->Window.Handle, \
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GCLP_HCURSOR, \
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( LONG )( LONG_PTR )LoadCursor( NULL, b ) ); \
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break;
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/* Nuke the cursor AND change it for this window class. */
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# define ZAP_CURSOR(a,b) \
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case a: \
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SetCursor( NULL ); \
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SetClassLongPtr( window->Window.Handle, \
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GCLP_HCURSOR, ( LONG )( LONG_PTR )NULL ); \
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break;
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#endif
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switch( cursorID )
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{
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MAP_CURSOR( GLUT_CURSOR_RIGHT_ARROW, IDC_ARROW );
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MAP_CURSOR( GLUT_CURSOR_LEFT_ARROW, IDC_ARROW );
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MAP_CURSOR( GLUT_CURSOR_INFO, IDC_HELP );
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MAP_CURSOR( GLUT_CURSOR_DESTROY, IDC_CROSS );
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MAP_CURSOR( GLUT_CURSOR_HELP, IDC_HELP );
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MAP_CURSOR( GLUT_CURSOR_CYCLE, IDC_SIZEALL );
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MAP_CURSOR( GLUT_CURSOR_SPRAY, IDC_CROSS );
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MAP_CURSOR( GLUT_CURSOR_WAIT, IDC_WAIT );
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MAP_CURSOR( GLUT_CURSOR_TEXT, IDC_IBEAM );
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MAP_CURSOR( GLUT_CURSOR_CROSSHAIR, IDC_CROSS );
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MAP_CURSOR( GLUT_CURSOR_UP_DOWN, IDC_SIZENS );
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MAP_CURSOR( GLUT_CURSOR_LEFT_RIGHT, IDC_SIZEWE );
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MAP_CURSOR( GLUT_CURSOR_TOP_SIDE, IDC_ARROW ); /* XXX ToDo */
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_SIDE, IDC_ARROW ); /* XXX ToDo */
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MAP_CURSOR( GLUT_CURSOR_LEFT_SIDE, IDC_ARROW ); /* XXX ToDo */
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MAP_CURSOR( GLUT_CURSOR_RIGHT_SIDE, IDC_ARROW ); /* XXX ToDo */
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MAP_CURSOR( GLUT_CURSOR_TOP_LEFT_CORNER, IDC_SIZENWSE );
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MAP_CURSOR( GLUT_CURSOR_TOP_RIGHT_CORNER, IDC_SIZENESW );
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_RIGHT_CORNER, IDC_SIZENWSE );
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MAP_CURSOR( GLUT_CURSOR_BOTTOM_LEFT_CORNER, IDC_SIZENESW );
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MAP_CURSOR( GLUT_CURSOR_INHERIT, IDC_ARROW ); /* XXX ToDo */
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ZAP_CURSOR( GLUT_CURSOR_NONE, NULL );
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MAP_CURSOR( GLUT_CURSOR_FULL_CROSSHAIR, IDC_CROSS ); /* XXX ToDo */
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default:
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fgError( "Unknown cursor type: %d", cursorID );
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break;
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}
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}
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static void fghWarpPointer ( int x, int y )
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{
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POINT coords;
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coords.x = x;
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coords.y = y;
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/* ClientToScreen() translates {coords} for us. */
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ClientToScreen( fgStructure.CurrentWindow->Window.Handle, &coords );
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SetCursorPos( coords.x, coords.y );
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}
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#endif
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/* -- INTERNAL FUNCTIONS ---------------------------------------------------- */
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void fgSetCursor ( SFG_Window *window, int cursorID )
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{
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fghSetCursor ( window, cursorID );
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}
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/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
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/*
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* Set the cursor image to be used for the current window
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*/
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void FGAPIENTRY glutSetCursor( int cursorID )
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{
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FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetCursor" );
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FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetCursor" );
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fghSetCursor ( fgStructure.CurrentWindow, cursorID );
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fgStructure.CurrentWindow->State.Cursor = cursorID;
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}
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/*
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* Moves the mouse pointer to given window coordinates
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*/
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void FGAPIENTRY glutWarpPointer( int x, int y )
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{
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FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWarpPointer" );
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FREEGLUT_EXIT_IF_NO_WINDOW ( "glutWarpPointer" );
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fghWarpPointer ( x, y );
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}
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/*** END OF FILE ***/
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