SDL_gsmouse.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:4k
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 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_gsmouse.c,v 1.3 2002/04/22 21:38:05 wmay Exp $";
- #endif
- #include <stdlib.h>
- #include <stdio.h>
- #include <sys/ioctl.h>
- #include "SDL_error.h"
- #include "SDL_mouse.h"
- #include "SDL_events_c.h"
- #include "SDL_cursor_c.h"
- #include "SDL_gsvideo.h"
- #include "SDL_gsmouse_c.h"
- /* The implementation dependent data for the window manager cursor */
- struct WMcursor {
- int unused;
- };
- /* There isn't any implementation dependent data */
- void GS_FreeWMCursor(_THIS, WMcursor *cursor)
- {
- return;
- }
- /* There isn't any implementation dependent data */
- WMcursor *GS_CreateWMCursor(_THIS,
- Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
- {
- return((WMcursor *)0x01);
- }
- static void GS_MoveCursor(_THIS, SDL_Cursor *cursor, int x, int y)
- {
- SDL_Surface *screen;
- struct ps2_image image;
- SDL_Rect area;
- int mouse_y1, mouse_y2;
- void *saved_pixels;
- int screen_updated;
- /* Lock so we don't interrupt an update with mouse motion */
- SDL_LockCursor();
- /* Make sure any pending DMA has completed */
- if ( dma_pending ) {
- ioctl(console_fd, PS2IOC_SENDQCT, 1);
- dma_pending = 0;
- }
- /* Remove the cursor image from the DMA area */
- screen = this->screen;
- saved_pixels = screen->pixels;
- screen->pixels = mapped_mem + screen->offset;
- screen_updated = 0;
- if ( cursor_drawn ) {
- SDL_EraseCursorNoLock(screen);
- cursor_drawn = 0;
- screen_updated = 1;
- }
- /* Save the current mouse area */
- SDL_MouseRect(&area);
- mouse_y1 = area.y;
- mouse_y2 = area.y+area.h;
- /* Only draw the new cursor if there was one passed in */
- if ( cursor ) {
- /* Set the new location */
- cursor->area.x = (x - cursor->hot_x);
- cursor->area.y = (y - cursor->hot_y);
- /* Draw the cursor at the new location */
- if ( (SDL_cursorstate & CURSOR_VISIBLE) && screen->pixels ) {
- SDL_DrawCursorNoLock(screen);
- cursor_drawn = 1;
- screen_updated = 1;
- }
- }
- screen->pixels = saved_pixels;
- /* Update the affected area of the screen */
- if ( screen_updated ) {
- SDL_MouseRect(&area);
- if ( area.y < mouse_y1 ) {
- mouse_y1 = area.y;
- }
- if ( (area.y+area.h) > mouse_y2 ) {
- mouse_y2 = area.y+area.h;
- }
- image = screen_image;
- image.y += screen->offset / screen->pitch + mouse_y1;
- image.h = mouse_y2 - mouse_y1;
- image.ptr = mapped_mem +
- (image.y - screen_image.y) * screen->pitch;
- ioctl(console_fd, PS2IOC_LOADIMAGE, &image);
- /* Need to scale offscreen image to TV output */
- if ( image.y > 0 ) {
- scaleimage_nonblock(console_fd,
- tex_tags_mem, scale_tags_mem);
- }
- }
- /* We're finished */
- SDL_UnlockCursor();
- }
- void GS_MoveWMCursor(_THIS, int x, int y)
- {
- GS_MoveCursor(this, SDL_cursor, x, y);
- }
- int GS_ShowWMCursor(_THIS, WMcursor *wmcursor)
- {
- SDL_Cursor *cursor;
- int x, y;
- /* Draw the cursor at the appropriate location */
- SDL_GetMouseState(&x, &y);
- if ( wmcursor ) {
- cursor = SDL_cursor;
- } else {
- cursor = NULL;
- }
- GS_MoveCursor(this, cursor, x, y);
- return(1);
- }