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Simplifying the system-dependent conditional code in "freeglut_cursor.c"

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git-svn-id: https://svn.code.sf.net/p/freeglut/code/trunk@859 7f0cb862-5218-0410-a997-914c9d46530a
This commit is contained in:
fayjf 2009-12-05 14:58:24 +00:00
parent 439af1ae86
commit f2e555b6e6
1 changed files with 77 additions and 79 deletions
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156
freeglut/freeglut/src/freeglut_cursor.c
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@ -28,10 +28,6 @@
#include <GL/freeglut.h>
#include "freeglut_internal.h"
#if TARGET_HOST_POSIX_X11
#include <X11/cursorfont.h>
#endif
/*
* TODO BEFORE THE STABLE RELEASE:
* glutSetCursor() -- Win32 mappings are incomplete.
@ -44,6 +40,8 @@
/* -- PRIVATE FUNCTIONS --------------------------------------------------- */
#if TARGET_HOST_POSIX_X11
#include <X11/cursorfont.h>
/*
* A factory method for an empty cursor
*/
@ -102,62 +100,71 @@ static cursorCacheEntry cursorCache[] = {
{ XC_bottom_right_corner, None }, /* GLUT_CURSOR_BOTTOM_RIGHT_CORNER */
{ XC_bottom_left_corner, None } /* GLUT_CURSOR_BOTTOM_LEFT_CORNER */
};
#endif
/* -- INTERNAL FUNCTIONS ---------------------------------------------------- */
/*
* Set the cursor image to be used for the current window
*/
void fgSetCursor ( SFG_Window *window, int cursorID )
static void fghSetCursor ( SFG_Window *window, int cursorID )
{
#if TARGET_HOST_POSIX_X11
{
Cursor cursor;
/*
* XXX FULL_CROSSHAIR demotes to plain CROSSHAIR. Old GLUT allows
* for this, but if there is a system that easily supports a full-
* window (or full-screen) crosshair, we might consider it.
*/
int cursorIDToUse =
( cursorID == GLUT_CURSOR_FULL_CROSSHAIR ) ? GLUT_CURSOR_CROSSHAIR : cursorID;
Cursor cursor;
/*
* XXX FULL_CROSSHAIR demotes to plain CROSSHAIR. Old GLUT allows
* for this, but if there is a system that easily supports a full-
* window (or full-screen) crosshair, we might consider it.
*/
int cursorIDToUse =
( cursorID == GLUT_CURSOR_FULL_CROSSHAIR ) ? GLUT_CURSOR_CROSSHAIR : cursorID;
if( ( cursorIDToUse >= 0 ) &&
( cursorIDToUse < sizeof( cursorCache ) / sizeof( cursorCache[0] ) ) ) {
cursorCacheEntry *entry = &cursorCache[ cursorIDToUse ];
if( entry->cachedCursor == None ) {
entry->cachedCursor =
XCreateFontCursor( fgDisplay.Display, entry->cursorShape );
}
cursor = entry->cachedCursor;
} else {
switch( cursorIDToUse )
{
case GLUT_CURSOR_NONE:
cursor = getEmptyCursor( );
break;
case GLUT_CURSOR_INHERIT:
cursor = None;
break;
default:
fgError( "Unknown cursor type: %d", cursorIDToUse );
return;
}
if( ( cursorIDToUse >= 0 ) &&
( cursorIDToUse < sizeof( cursorCache ) / sizeof( cursorCache[0] ) ) ) {
cursorCacheEntry *entry = &cursorCache[ cursorIDToUse ];
if( entry->cachedCursor == None ) {
entry->cachedCursor =
XCreateFontCursor( fgDisplay.Display, entry->cursorShape );
}
cursor = entry->cachedCursor;
} else {
switch( cursorIDToUse )
{
case GLUT_CURSOR_NONE:
cursor = getEmptyCursor( );
break;
if ( cursorIDToUse == GLUT_CURSOR_INHERIT ) {
XUndefineCursor( fgDisplay.Display, window->Window.Handle );
} else if ( cursor != None ) {
XDefineCursor( fgDisplay.Display, window->Window.Handle, cursor );
} else if ( cursorIDToUse != GLUT_CURSOR_NONE ) {
fgError( "Failed to create cursor" );
case GLUT_CURSOR_INHERIT:
cursor = None;
break;
default:
fgError( "Unknown cursor type: %d", cursorIDToUse );
return;
}
}
#elif TARGET_HOST_MS_WINDOWS
if ( cursorIDToUse == GLUT_CURSOR_INHERIT ) {
XUndefineCursor( fgDisplay.Display, window->Window.Handle );
} else if ( cursor != None ) {
XDefineCursor( fgDisplay.Display, window->Window.Handle, cursor );
} else if ( cursorIDToUse != GLUT_CURSOR_NONE ) {
fgError( "Failed to create cursor" );
}
}
static void fghWarpPointer ( int x, int y )
{
XWarpPointer(
fgDisplay.Display,
None,
fgStructure.CurrentWindow->Window.Handle,
0, 0, 0, 0,
x, y
);
/* Make the warp visible immediately. */
XFlush( fgDisplay.Display );
}
#endif
#if TARGET_HOST_MS_WINDOWS
static void fghSetCursor ( SFG_Window *window, int cursorID )
{
/*
* Joe Krahn is re-writing the following code.
*/
@ -224,10 +231,24 @@ void fgSetCursor ( SFG_Window *window, int cursorID )
fgError( "Unknown cursor type: %d", cursorID );
break;
}
}
static void fghWarpPointer ( int x, int y )
{
POINT coords;
coords.x = x;
coords.y = y;
/* ClientToScreen() translates {coords} for us. */
ClientToScreen( fgStructure.CurrentWindow->Window.Handle, &coords );
SetCursorPos( coords.x, coords.y );
}
#endif
window->State.Cursor = cursorID;
}
/* -- INTERNAL FUNCTIONS ---------------------------------------------------- */
/* -- INTERFACE FUNCTIONS -------------------------------------------------- */
@ -239,7 +260,8 @@ void FGAPIENTRY glutSetCursor( int cursorID )
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutSetCursor" );
FREEGLUT_EXIT_IF_NO_WINDOW ( "glutSetCursor" );
fgSetCursor ( fgStructure.CurrentWindow, cursorID );
fghSetCursor ( fgStructure.CurrentWindow, cursorID );
fgStructure.CurrentWindow->State.Cursor = cursorID;
}
/*
@ -250,31 +272,7 @@ void FGAPIENTRY glutWarpPointer( int x, int y )
FREEGLUT_EXIT_IF_NOT_INITIALISED ( "glutWarpPointer" );
FREEGLUT_EXIT_IF_NO_WINDOW ( "glutWarpPointer" );
#if TARGET_HOST_POSIX_X11
XWarpPointer(
fgDisplay.Display,
None,
fgStructure.CurrentWindow->Window.Handle,
0, 0, 0, 0,
x, y
);
/* Make the warp visible immediately. */
XFlush( fgDisplay.Display );
#elif TARGET_HOST_MS_WINDOWS
{
POINT coords;
coords.x = x;
coords.y = y;
/* ClientToScreen() translates {coords} for us. */
ClientToScreen( fgStructure.CurrentWindow->Window.Handle, &coords );
SetCursorPos( coords.x, coords.y );
}
#endif
fghWarpPointer ( x, y );
}
/*** END OF FILE ***/