SDL_sysmouse.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:7k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999 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_sysmouse.c,v 1.4 2002/04/22 21:38:05 wmay Exp $";
- #endif
- #include <stdlib.h>
- #include <windows.h>
- #include "SDL_error.h"
- #include "SDL_mouse.h"
- #include "SDL_sysmouse_c.h"
- #include "SDL_events_c.h"
- #include "SDL_cursor_c.h"
- #include "SDL_lowvideo.h"
- #ifdef _WIN32_WCE
- #define USE_STATIC_CURSOR
- #endif
- HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */
- /* The implementation dependent data for the window manager cursor */
- /* For some reason when creating a windows cursor, the ands and xors memory
- is not copied, so we need to keep track of it and free it when we are done
- with the cursor. If we free the memory prematurely, the app crashes. :-}
- */
- struct WMcursor {
- HCURSOR curs;
- #ifndef USE_STATIC_CURSOR
- Uint8 *ands;
- Uint8 *xors;
- #endif
- };
- /* Convert bits to padded bytes */
- #define PAD_BITS(bits) ((bits+7)/8)
- #ifdef CURSOR_DEBUG
- static void PrintBITMAP(FILE *out, char *bits, int w, int h)
- {
- int i;
- unsigned char ch;
- while ( h-- > 0 ) {
- for ( i=0; i<w; ++i ) {
- if ( (i%8) == 0 )
- ch = *bits++;
- if ( ch&0x80 )
- fprintf(out, "X");
- else
- fprintf(out, " ");
- ch <<= 1;
- }
- fprintf(out, "n");
- }
- }
- #endif
- #ifndef USE_STATIC_CURSOR
- /* Local functions to convert the SDL cursor mask into Windows format */
- static void memnot(Uint8 *dst, Uint8 *src, int len)
- {
- while ( len-- > 0 )
- *dst++ = ~*src++;
- }
- static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len)
- {
- while ( len-- > 0 )
- *dst++ = (*src1++)^(*src2++);
- }
- #endif /* !USE_STATIC_CURSOR */
- void WIN_FreeWMCursor(_THIS, WMcursor *cursor)
- {
- #ifndef USE_STATIC_CURSOR
- if ( cursor->curs != NULL )
- DestroyCursor(cursor->curs);
- if ( cursor->ands != NULL )
- free(cursor->ands);
- if ( cursor->xors != NULL )
- free(cursor->xors);
- #endif /* !USE_STATIC_CURSOR */
- free(cursor);
- }
- WMcursor *WIN_CreateWMCursor(_THIS,
- Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
- {
- #ifdef USE_STATIC_CURSOR
- WMcursor *cursor;
- /* Allocate the cursor */
- cursor = (WMcursor *)malloc(sizeof(*cursor));
- if ( cursor ) {
- cursor->curs = LoadCursor(NULL, IDC_ARROW);
- }
- return(cursor);
- #else
- WMcursor *cursor;
- int allowed_x;
- int allowed_y;
- int run, pad, i;
- Uint8 *aptr, *xptr;
- /* Check to make sure the cursor size is okay */
- allowed_x = GetSystemMetrics(SM_CXCURSOR);
- allowed_y = GetSystemMetrics(SM_CYCURSOR);
- if ( (w > allowed_x) || (h > allowed_y) ) {
- SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
- allowed_x, allowed_y);
- return(NULL);
- }
- /* Allocate the cursor */
- cursor = (WMcursor *)malloc(sizeof(*cursor));
- if ( cursor == NULL ) {
- SDL_SetError("Out of memory");
- return(NULL);
- }
- cursor->curs = NULL;
- cursor->ands = NULL;
- cursor->xors = NULL;
- /* Pad out to the normal cursor size */
- run = PAD_BITS(w);
- pad = PAD_BITS(allowed_x)-run;
- aptr = cursor->ands = (Uint8 *)malloc((run+pad)*allowed_y);
- xptr = cursor->xors = (Uint8 *)malloc((run+pad)*allowed_y);
- if ( (aptr == NULL) || (xptr == NULL) ) {
- WIN_FreeWMCursor(NULL, cursor);
- SDL_OutOfMemory();
- return(NULL);
- }
- for ( i=0; i<h; ++i ) {
- memxor(xptr, data, mask, run);
- xptr += run;
- data += run;
- memnot(aptr, mask, run);
- mask += run;
- aptr += run;
- memset(xptr, 0, pad);
- xptr += pad;
- memset(aptr, ~0, pad);
- aptr += pad;
- }
- pad += run;
- for ( ; i<allowed_y; ++i ) {
- memset(xptr, 0, pad);
- xptr += pad;
- memset(aptr, ~0, pad);
- aptr += pad;
- }
- /* Create the cursor */
- cursor->curs = CreateCursor(
- (HINSTANCE)GetWindowLong(SDL_Window, GWL_HINSTANCE),
- hot_x, hot_y, allowed_x, allowed_y,
- cursor->ands, cursor->xors);
- if ( cursor->curs == NULL ) {
- WIN_FreeWMCursor(NULL, cursor);
- SDL_SetError("Windows couldn't create the requested cursor");
- return(NULL);
- }
- return(cursor);
- #endif /* USE_STATIC_CURSOR */
- }
- int WIN_ShowWMCursor(_THIS, WMcursor *cursor)
- {
- POINT mouse_pos;
- /* The fullscreen cursor must be done in software with DirectInput */
- if ( !this->screen || DDRAW_FULLSCREEN() ) {
- return(0);
- }
- /* Set the window cursor to our cursor, if applicable */
- if ( cursor != NULL ) {
- SDL_hcursor = cursor->curs;
- } else {
- SDL_hcursor = NULL;
- }
- GetCursorPos(&mouse_pos);
- if ( PtInRect(&SDL_bounds, mouse_pos) ) {
- SetCursor(SDL_hcursor);
- }
- return(1);
- }
- void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
- {
- POINT pt;
- if ( DDRAW_FULLSCREEN() ) {
- 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 if ( mouse_relative) {
- /* RJR: March 28, 2000
- leave physical cursor at center of screen if
- mouse hidden and grabbed */
- SDL_PrivateMouseMotion(0, 0, x, y);
- } else {
- pt.x = x;
- pt.y = y;
- ClientToScreen(SDL_Window, &pt);
- SetCursorPos(pt.x, pt.y);
- }
- }
- /* Update the current mouse state and position */
- void WIN_UpdateMouse(_THIS)
- {
- RECT rect;
- POINT pt;
- if ( ! DDRAW_FULLSCREEN() ) {
- GetClientRect(SDL_Window, &rect);
- GetCursorPos(&pt);
- MapWindowPoints(NULL, SDL_Window, &pt, 1);
- if (PtInRect(&rect, pt) && (WindowFromPoint(pt) == SDL_Window)){
- SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
- SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y);
- } else {
- SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
- }
- }
- }
- /* Check to see if we need to enter or leave mouse relative mode */
- void WIN_CheckMouseMode(_THIS)
- {
- /* If the mouse is hidden and input is grabbed, we use relative mode */
- if ( !(SDL_cursorstate & CURSOR_VISIBLE) &&
- (this->input_grab != SDL_GRAB_OFF) ) {
- mouse_relative = 1;
- } else {
- mouse_relative = 0;
- }
- }