SDL_x11mouse.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:8k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 of the License, or (at your option) any later version.
- This library is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_x11mouse.c,v 1.4 2002/04/22 21:38:06 wmay Exp $";
- #endif
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include <X11/Xlib.h>
- #include <X11/Xutil.h>
- #include "SDL_error.h"
- #include "SDL_mouse.h"
- #include "SDL_events_c.h"
- #include "SDL_cursor_c.h"
- #include "SDL_x11dga_c.h"
- #include "SDL_x11mouse_c.h"
- /* The implementation dependent data for the window manager cursor */
- struct WMcursor {
- Cursor x_cursor;
- };
- void X11_FreeWMCursor(_THIS, WMcursor *cursor)
- {
- if ( SDL_Display != NULL ) {
- SDL_Lock_EventThread();
- XFreeCursor(SDL_Display, cursor->x_cursor);
- XSync(SDL_Display, False);
- SDL_Unlock_EventThread();
- }
- free(cursor);
- }
- WMcursor *X11_CreateWMCursor(_THIS,
- Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
- {
- WMcursor *cursor;
- XGCValues GCvalues;
- GC GCcursor;
- XImage *data_image, *mask_image;
- Pixmap data_pixmap, mask_pixmap;
- int clen, i;
- char *x_data, *x_mask;
- static XColor black = { 0, 0, 0, 0 };
- static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff };
- /* Allocate the cursor memory */
- cursor = (WMcursor *)malloc(sizeof(WMcursor));
- if ( cursor == NULL ) {
- SDL_OutOfMemory();
- return(NULL);
- }
- /* Mix the mask and the data */
- clen = (w/8)*h;
- x_data = (char *)malloc(clen);
- if ( x_data == NULL ) {
- free(cursor);
- SDL_OutOfMemory();
- return(NULL);
- }
- x_mask = (char *)malloc(clen);
- if ( x_mask == NULL ) {
- free(cursor);
- free(x_data);
- SDL_OutOfMemory();
- return(NULL);
- }
- for ( i=0; i<clen; ++i ) {
- /* The mask is OR'd with the data to turn inverted color
- pixels black since inverted color cursors aren't supported
- under X11.
- */
- x_mask[i] = data[i] | mask[i];
- x_data[i] = data[i];
- }
- /* Prevent the event thread from running while we use the X server */
- SDL_Lock_EventThread();
- /* Create the data image */
- data_image = XCreateImage(SDL_Display,
- DefaultVisual(SDL_Display, SDL_Screen),
- 1, XYBitmap, 0, x_data, w, h, 8, w/8);
- data_image->byte_order = MSBFirst;
- data_image->bitmap_bit_order = MSBFirst;
- data_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
- /* Create the data mask */
- mask_image = XCreateImage(SDL_Display,
- DefaultVisual(SDL_Display, SDL_Screen),
- 1, XYBitmap, 0, x_mask, w, h, 8, w/8);
- mask_image->byte_order = MSBFirst;
- mask_image->bitmap_bit_order = MSBFirst;
- mask_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1);
- /* Create the graphics context */
- GCvalues.function = GXcopy;
- GCvalues.foreground = ~0;
- GCvalues.background = 0;
- GCvalues.plane_mask = AllPlanes;
- GCcursor = XCreateGC(SDL_Display, data_pixmap,
- (GCFunction|GCForeground|GCBackground|GCPlaneMask),
- &GCvalues);
- /* Blit the images to the pixmaps */
- XPutImage(SDL_Display, data_pixmap, GCcursor, data_image,
- 0, 0, 0, 0, w, h);
- XPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image,
- 0, 0, 0, 0, w, h);
- XFreeGC(SDL_Display, GCcursor);
- /* These free the x_data and x_mask memory pointers */
- XDestroyImage(data_image);
- XDestroyImage(mask_image);
- /* Create the cursor */
- cursor->x_cursor = XCreatePixmapCursor(SDL_Display, data_pixmap,
- mask_pixmap, &black, &white, hot_x, hot_y);
- /* Release the event thread */
- XSync(SDL_Display, False);
- SDL_Unlock_EventThread();
- return(cursor);
- }
- int X11_ShowWMCursor(_THIS, WMcursor *cursor)
- {
- /* Don't do anything if the display is gone */
- if ( SDL_Display == NULL ) {
- return(0);
- }
- /* Set the X11 cursor cursor, or blank if cursor is NULL */
- if ( SDL_Window ) {
- SDL_Lock_EventThread();
- if ( cursor == NULL ) {
- if ( SDL_BlankCursor != NULL ) {
- XDefineCursor(SDL_Display, SDL_Window,
- SDL_BlankCursor->x_cursor);
- }
- } else {
- XDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor);
- }
- XSync(SDL_Display, False);
- SDL_Unlock_EventThread();
- }
- return(1);
- }
- void X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
- {
- if ( using_dga & DGA_MOUSE ) {
- x += (this->screen->offset % this->screen->pitch) /
- this->screen->format->BytesPerPixel;
- y += (this->screen->offset / this->screen->pitch);
- SDL_PrivateMouseMotion(0, 0, x, y);
- } else {
- SDL_Lock_EventThread();
- XWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y);
- XSync(SDL_Display, False);
- SDL_Unlock_EventThread();
- }
- }
- /* Sets the mouse acceleration from a string of the form:
- 2/1/0
- The first number is the numerator, followed by the acceleration
- denumenator and threshold.
- */
- static void SetMouseAccel(_THIS, const char *accel_param)
- {
- int i;
- int accel_value[3];
- char *mouse_param, *mouse_param_buf, *pin;
- mouse_param_buf = (char *)malloc(strlen(accel_param)+1);
- if ( ! mouse_param_buf ) {
- return;
- }
- strcpy(mouse_param_buf, accel_param);
- mouse_param = mouse_param_buf;
- for ( i=0; (i < 3) && mouse_param; ++i ) {
- pin = strchr(mouse_param, '/');
- if ( pin ) {
- *pin = ' ';
- }
- accel_value[i] = atoi(mouse_param);
- if ( pin ) {
- mouse_param = pin+1;
- } else {
- mouse_param = NULL;
- }
- }
- if ( mouse_param_buf ) {
- XChangePointerControl(SDL_Display, True, True,
- accel_value[0], accel_value[1], accel_value[2]);
- free(mouse_param_buf);
- }
- }
- /* Check to see if we need to enter or leave mouse relative mode */
- void X11_CheckMouseModeNoLock(_THIS)
- {
- char *env_override;
- int enable_relative = 1;
- /* Allow the user to override the relative mouse mode.
- They almost never want to do this, as it seriously affects
- applications that rely on continuous relative mouse motion.
- */
- env_override = getenv("SDL_MOUSE_RELATIVE");
- if ( env_override ) {
- enable_relative = atoi(env_override);
- }
- /* If the mouse is hidden and input is grabbed, we use relative mode */
- if ( enable_relative &&
- !(SDL_cursorstate & CURSOR_VISIBLE) &&
- (this->input_grab != SDL_GRAB_OFF) &&
- (SDL_GetAppState() & SDL_APPACTIVE) ) {
- if ( ! mouse_relative ) {
- X11_EnableDGAMouse(this);
- if ( ! (using_dga & DGA_MOUSE) ) {
- char *xmouse_accel;
- SDL_GetMouseState(&mouse_last.x, &mouse_last.y);
- /* Use as raw mouse mickeys as possible */
- XGetPointerControl(SDL_Display,
- &mouse_accel.numerator,
- &mouse_accel.denominator,
- &mouse_accel.threshold);
- xmouse_accel=getenv("SDL_VIDEO_X11_MOUSEACCEL");
- if ( xmouse_accel ) {
- SetMouseAccel(this, xmouse_accel);
- }
- }
- mouse_relative = 1;
- }
- } else {
- if ( mouse_relative ) {
- if ( using_dga & DGA_MOUSE ) {
- X11_DisableDGAMouse(this);
- } else {
- XChangePointerControl(SDL_Display, True, True,
- mouse_accel.numerator,
- mouse_accel.denominator,
- mouse_accel.threshold);
- }
- mouse_relative = 0;
- }
- }
- }
- void X11_CheckMouseMode(_THIS)
- {
- SDL_Lock_EventThread();
- X11_CheckMouseModeNoLock(this);
- SDL_Unlock_EventThread();
- }