From a4dcdcf0ffae4c6cf52354fbd63c95d7d7815fd9 Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 19 Aug 1999 13:57:42 +0000 Subject: initial check-in (post crash) --- src/glut/glx/glut_cursor.c | 201 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 201 insertions(+) create mode 100644 src/glut/glx/glut_cursor.c (limited to 'src/glut/glx/glut_cursor.c') diff --git a/src/glut/glx/glut_cursor.c b/src/glut/glx/glut_cursor.c new file mode 100644 index 0000000000..74ecb9cd66 --- /dev/null +++ b/src/glut/glx/glut_cursor.c @@ -0,0 +1,201 @@ + +/* Copyright (c) Mark J. Kilgard, 1995, 1998. */ + +/* This program is freely distributable without licensing fees + and is provided without guarantee or warrantee expressed or + implied. This program is -not- in the public domain. */ + +#include "glutint.h" + +#if !defined(_WIN32) +#include /* For XA_CURSOR */ +#include +#endif + +typedef struct _CursorTable { +#if defined(_WIN32) + char* glyph; +#else + int glyph; +#endif + Cursor cursor; +} CursorTable; +/* *INDENT-OFF* */ + +static CursorTable cursorTable[] = { + {XC_arrow, None}, /* GLUT_CURSOR_RIGHT_ARROW */ + {XC_top_left_arrow, None}, /* GLUT_CURSOR_LEFT_ARROW */ + {XC_hand1, None}, /* GLUT_CURSOR_INFO */ + {XC_pirate, None}, /* GLUT_CURSOR_DESTROY */ + {XC_question_arrow, None}, /* GLUT_CURSOR_HELP */ + {XC_exchange, None}, /* GLUT_CURSOR_CYCLE */ + {XC_spraycan, None}, /* GLUT_CURSOR_SPRAY */ + {XC_watch, None}, /* GLUT_CURSOR_WAIT */ + {XC_xterm, None}, /* GLUT_CURSOR_TEXT */ + {XC_crosshair, None}, /* GLUT_CURSOR_CROSSHAIR */ + {XC_sb_v_double_arrow, None}, /* GLUT_CURSOR_UP_DOWN */ + {XC_sb_h_double_arrow, None}, /* GLUT_CURSOR_LEFT_RIGHT */ + {XC_top_side, None}, /* GLUT_CURSOR_TOP_SIDE */ + {XC_bottom_side, None}, /* GLUT_CURSOR_BOTTOM_SIDE */ + {XC_left_side, None}, /* GLUT_CURSOR_LEFT_SIDE */ + {XC_right_side, None}, /* GLUT_CURSOR_RIGHT_SIDE */ + {XC_top_left_corner, None}, /* GLUT_CURSOR_TOP_LEFT_CORNER */ + {XC_top_right_corner, None}, /* GLUT_CURSOR_TOP_RIGHT_CORNER */ + {XC_bottom_right_corner, None}, /* GLUT_CURSOR_BOTTOM_RIGHT_CORNER */ + {XC_bottom_left_corner, None}, /* GLUT_CURSOR_BOTTOM_LEFT_CORNER */ +}; +/* *INDENT-ON* */ + +#if !defined(_WIN32) +static Cursor blankCursor = None; +static Cursor fullCrosshairCusor = None; + +/* SGI X server's support a special property called the + _SGI_CROSSHAIR_CURSOR that when installed as a window's + cursor, becomes a full screen crosshair cursor. SGI + has special cursor generation hardware for this case. */ +static Cursor +getFullCrosshairCursor(void) +{ + Cursor cursor; + Atom crosshairAtom, actualType; + int rc, actualFormat; + unsigned long n, left; + unsigned long *value; + + if (fullCrosshairCusor == None) { + crosshairAtom = XInternAtom(__glutDisplay, + "_SGI_CROSSHAIR_CURSOR", True); + if (crosshairAtom != None) { + value = 0; /* Make compiler happy. */ + rc = XGetWindowProperty(__glutDisplay, __glutRoot, + crosshairAtom, 0, 1, False, XA_CURSOR, &actualType, + &actualFormat, &n, &left, (unsigned char **) &value); + if (rc == Success && actualFormat == 32 && n >= 1) { + cursor = value[0]; + XFree(value); + return cursor; + } + } + } + return XCreateFontCursor(__glutDisplay, XC_crosshair); +} + +/* X11 forces you to create a blank cursor if you want + to disable the cursor. */ +static Cursor +makeBlankCursor(void) +{ + static char data[1] = + {0}; + Cursor cursor; + Pixmap blank; + XColor dummy; + + blank = XCreateBitmapFromData(__glutDisplay, __glutRoot, + data, 1, 1); + if (blank == None) + __glutFatalError("out of memory."); + cursor = XCreatePixmapCursor(__glutDisplay, blank, blank, + &dummy, &dummy, 0, 0); + XFreePixmap(__glutDisplay, blank); + + return cursor; +} +#endif /* !_WIN32 */ + +/* Win32 and X11 use this same function to accomplish + fairly different tasks. X11 lets you just define the + cursor for a window and the window system takes care + of making sure that the window's cursor is installed + when the mouse is in the window. Win32 requires the + application to handle a WM_SETCURSOR message to install + the right cursor when windows are entered. Think of + the Win32 __glutSetCursor (called from __glutWindowProc) + as "install cursor". Think of the X11 __glutSetCursor + (called from glutSetCursor) as "define cursor". */ +void +__glutSetCursor(GLUTwindow *window) +{ + int cursor = window->cursor; + Cursor xcursor; + + if (cursor >= 0 && + cursor < sizeof(cursorTable) / sizeof(cursorTable[0])) { + if (cursorTable[cursor].cursor == None) { + cursorTable[cursor].cursor = XCreateFontCursor(__glutDisplay, + cursorTable[cursor].glyph); + } + xcursor = cursorTable[cursor].cursor; + } else { + /* Special cases. */ + switch (cursor) { + case GLUT_CURSOR_INHERIT: +#if defined(_WIN32) + while (window->parent) { + window = window->parent; + if (window->cursor != GLUT_CURSOR_INHERIT) { + __glutSetCursor(window); + return; + } + } + /* XXX Default to an arrow cursor. Is this + right or should we be letting the default + window proc be installing some system cursor? */ + xcursor = cursorTable[0].cursor; + if (xcursor == NULL) { + xcursor = + cursorTable[0].cursor = + LoadCursor(NULL, cursorTable[0].glyph); + } +#else + xcursor = None; +#endif + break; + case GLUT_CURSOR_NONE: +#if defined(_WIN32) + xcursor = NULL; +#else + if (blankCursor == None) { + blankCursor = makeBlankCursor(); + } + xcursor = blankCursor; +#endif + break; + case GLUT_CURSOR_FULL_CROSSHAIR: +#if defined(_WIN32) + xcursor = IDC_CROSS; +#else + if (fullCrosshairCusor == None) { + fullCrosshairCusor = getFullCrosshairCursor(); + } + xcursor = fullCrosshairCusor; +#endif + break; + } + } + XDefineCursor(__glutDisplay, + window->win, xcursor); + XFlush(__glutDisplay); +} + +/* CENTRY */ +void APIENTRY +glutSetCursor(int cursor) +{ +#ifdef _WIN32 + POINT point; + + __glutCurrentWindow->cursor = cursor; + /* Are we in the window right now? If so, + install the cursor. */ + GetCursorPos(&point); + if (__glutCurrentWindow->win == WindowFromPoint(point)) { + __glutSetCursor(__glutCurrentWindow); + } +#else + __glutCurrentWindow->cursor = cursor; + __glutSetCursor(__glutCurrentWindow); +#endif +} +/* ENDCENTRY */ -- cgit v1.2.3