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SDL_wimppoll.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2012 Sam Lantinga
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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
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slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/*
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File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
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27 March 2003
Implements Pumping of events and WIMP polling
*/
#include "SDL.h"
#include "SDL_syswm.h"
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#include "../../events/SDL_sysevents.h"
#include "../../events/SDL_events_c.h"
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#include "SDL_riscosvideo.h"
#include "SDL_riscosevents_c.h"
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#include "SDL_riscosmouse_c.h"
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#include "../../timer/SDL_timer_c.h"
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#include "memory.h"
#include "stdlib.h"
#include "ctype.h"
#include "kernel.h"
#include "swis.h"
#include "unixlib/os.h"
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#if !SDL_THREADS_DISABLED
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#include <pthread.h>
#endif
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/* Local functions */
void WIMP_Poll(_THIS, int waitTime);
void WIMP_SetFocus(int win);
/* SDL_riscossprite functions */
void WIMP_PlotSprite(_THIS, int x, int y);
extern void WIMP_PollMouse(_THIS);
extern void RISCOS_PollKeyboard();
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#if SDL_THREADS_DISABLED
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/* Timer running function */
extern void RISCOS_CheckTimer();
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#else
extern int riscos_using_threads;
#endif
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/* Mouse cursor handling */
extern void WIMP_ReshowCursor(_THIS);
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extern void WIMP_RestoreWimpCursor();
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int hasFocus = 0;
int mouseInWindow = 0;
/* Flag to ensure window is correct size after a mode change */
static int resizeOnOpen = 0;
void WIMP_PumpEvents(_THIS)
{
WIMP_Poll(this, 0);
if (hasFocus) RISCOS_PollKeyboard();
if (mouseInWindow) WIMP_PollMouse(this);
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#if SDL_THREADS_DISABLED
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if (SDL_timer_running) RISCOS_CheckTimer();
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#endif
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}
void WIMP_Poll(_THIS, int waitTime)
{
_kernel_swi_regs regs;
int message[64];
unsigned int code;
int pollMask = 0;
int doPoll = 1;
int sysEvent;
int sdlWindow = this->hidden->window_handle;
if (this->PumpEvents != WIMP_PumpEvents) return;
if (waitTime > 0)
{
_kernel_swi(OS_ReadMonotonicTime, ®s, ®s);
waitTime += regs.r[0];
}
while (doPoll)
{
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#if !SDL_THREADS_DISABLED
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/* Stop thread callbacks while program is paged out */
if (riscos_using_threads) __pthread_stop_ticker();
#endif
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if (waitTime <= 0)
{
regs.r[0] = pollMask; /* Poll Mask */
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/* For no wait time mask out null event so we wait until something happens */
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if (waitTime < 0) regs.r[0] |= 1;
regs.r[1] = (int)message;
_kernel_swi(Wimp_Poll, ®s, ®s);
} else
{
regs.r[0] = pollMask;
regs.r[1] = (int)message;
regs.r[2] = waitTime;
_kernel_swi(Wimp_PollIdle, ®s, ®s);
}
/* Flag to specify if we post a SDL_SysWMEvent */
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sysEvent = 0;
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code = (unsigned int)regs.r[0];
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switch(code)
{
case 0: /* Null Event - drop out for standard processing*/
doPoll = 0;
break;
case 1: /* Redraw window */
_kernel_swi(Wimp_RedrawWindow, ®s,®s);
if (message[0] == sdlWindow)
{
while (regs.r[0])
{
WIMP_PlotSprite(this, message[1], message[2]);
_kernel_swi(Wimp_GetRectangle, ®s, ®s);
}
} else
{
/* TODO: Currently we just eat them - we may need to pass them on */
while (regs.r[0])
{
_kernel_swi(Wimp_GetRectangle, ®s, ®s);
}
}
break;
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case 2: /* Open window */
if ( resizeOnOpen && message[0] == sdlWindow)
{
/* Ensure window is correct size */
resizeOnOpen = 0;
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message[3] = message[1] + (this->screen->w << 1);
message[4] = message[2] + (this->screen->h << 1);
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}
_kernel_swi(Wimp_OpenWindow, ®s, ®s);
break;
case 3: /* Close window */
if (message[0] == sdlWindow)
{
/* Documentation makes it looks as if the following line is correct:
** if (SDL_PrivateQuit() == 1) _kernel_swi(Wimp_CloseWindow, ®s, ®s);
** However some programs don't process this message and so sit there invisibly
** in the background so I just post the quit message and hope the application
** does the correct thing.
*/
SDL_PrivateQuit();
} else
sysEvent = 1;
doPoll = 0;
break;
case 4: /* Pointer_Leaving_Window */
if (message[0] == sdlWindow)
{
mouseInWindow = 0;
//TODO: Lose buttons / dragging
/* Reset to default pointer */
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WIMP_RestoreWimpCursor();
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SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);
} else
sysEvent = 1;
break;
case 5: /* Pointer_Entering_Window */
if (message[0] == sdlWindow)
{
mouseInWindow = 1;
WIMP_ReshowCursor(this);
SDL_PrivateAppActive(1, SDL_APPMOUSEFOCUS);
} else sysEvent = 1;
break;
case 6: /* Mouse_Click */
if (hasFocus == 0)
{
/* First click gives focus if it's not a menu */
/* we only count non-menu clicks on a window that has the focus */
WIMP_SetFocus(message[3]);
} else
doPoll = 0; // So PollMouse gets a chance to pick it up
break;
case 7: /* User_Drag_Box - Used for mouse release */
//TODO: May need to implement this in the future
sysEvent = 1;
break;
case 8: /* Keypressed */
doPoll = 0; /* PollKeyboard should pick it up */
if (message[0] != sdlWindow) sysEvent = 1;
/*TODO: May want to always pass F12 etc to the wimp
{
regs.r[0] = message[6];
_kernel_swi(Wimp_ProcessKey, ®s, ®s);
}
*/
break;
case 11: /* Lose Caret */
hasFocus = 0;
if (message[0] == sdlWindow) SDL_PrivateAppActive(0, SDL_APPINPUTFOCUS);
else sysEvent = 1;
break;
case 12: /* Gain Caret */
hasFocus = 1;
if (message[0] == sdlWindow) SDL_PrivateAppActive(1, SDL_APPINPUTFOCUS);
else sysEvent = 1;
break;
case 17:
case 18:
sysEvent = 1; /* All messages are passed on */
switch(message[4])
{
case 0: /* Quit Event */
/* No choice - have to quit */
SDL_Quit();
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exit(0);
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break;
case 8: /* Pre Quit */
SDL_PrivateQuit();
break;
case 0x400c1: /* Mode change */
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WIMP_ReadModeInfo(this);
WIMP_SetupPlotInfo(this);
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resizeOnOpen = 1;
break;
case 9: /* Palette changed */
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WIMP_SetupPlotInfo(this);
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break;
}
break;
default:
/* Pass unknown events on */
sysEvent = 1;
break;
}
if (sysEvent)
{
SDL_SysWMmsg wmmsg;
SDL_VERSION(&wmmsg.version);
wmmsg.eventCode = code;
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SDL_memcpy(wmmsg.pollBlock, message, 64 * sizeof(int));
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/* Fall out of polling loop if message is successfully posted */
if (SDL_PrivateSysWMEvent(&wmmsg)) doPoll = 0;
}
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#if !SDL_THREADS_DISABLED
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if (riscos_using_threads)
{
/* Restart ticker here so other thread can not interfere
with the Redraw processing */
if (riscos_using_threads) __pthread_start_ticker();
/* Give other threads a better chance of running */
pthread_yield();
}
#endif
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}
}
/* Set focus to specified window */
void WIMP_SetFocus(int win)
{
_kernel_swi_regs regs;
regs.r[0] = win;
regs.r[1] = -1; /* Icon handle */
regs.r[2] = 0; /* X-offset we just put it at position 0 */
regs.r[3] = 0; /* Y-offset as above */
regs.r[4] = 1 << 25; /* Caret is invisible */
regs.r[5] = 0; /* index into string */
_kernel_swi(Wimp_SetCaretPosition, ®s, ®s);
}
/** Run background task while in a sleep command */
void RISCOS_BackgroundTasks(void)
{
if (current_video && current_video->hidden->window_handle)
{
WIMP_Poll(current_video, 0);
}
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#if SDL_THREADS_DISABLED
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if (SDL_timer_running) RISCOS_CheckTimer();
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#endif
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}