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-rw-r--r--distrib/sdl-1.2.15/src/joystick/riscos/SDL_sysjoystick.c176
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diff --git a/distrib/sdl-1.2.15/src/joystick/riscos/SDL_sysjoystick.c b/distrib/sdl-1.2.15/src/joystick/riscos/SDL_sysjoystick.c
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+++ b/distrib/sdl-1.2.15/src/joystick/riscos/SDL_sysjoystick.c
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+/*
+ SDL - Simple DirectMedia Layer
+ Copyright (C) 1997-2012 Sam Lantinga
+
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+
+ Sam Lantinga
+ slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifdef SDL_JOYSTICK_RISCOS
+
+/*
+ RISC OS - Joystick support by Alan Buckley (alan_baa@hotmail.com) - 10 April 2003
+
+ Note: Currently assumes joystick is present if joystick module is loaded
+ and that there is one joystick with four buttons.
+*/
+
+/* This is the system specific header for the SDL joystick API */
+
+#include "SDL_events.h"
+#include "SDL_joystick.h"
+#include "../SDL_sysjoystick.h"
+#include "../SDL_joystick_c.h"
+
+#include "kernel.h"
+
+#define JOYSTICK_READ 0x43F40
+
+struct joystick_hwdata
+{
+ int joystate;
+};
+
+
+/* Function to scan the system for joysticks.
+ * This function should set SDL_numjoysticks to the number of available
+ * joysticks. Joystick 0 should be the system default joystick.
+ * It should return number of joysticks, or -1 on an unrecoverable fatal error.
+ */
+int SDL_SYS_JoystickInit(void)
+{
+ _kernel_swi_regs regs;
+
+ /* Try to read joystick 0 */
+ regs.r[0] = 0;
+ if (_kernel_swi(JOYSTICK_READ, &regs, &regs) == NULL)
+ {
+ /* Switch works so assume we've got a joystick */
+ return 1;
+ }
+ /* Switch fails so it looks like there's no joystick here */
+
+ return(0);
+}
+
+/* Function to get the device-dependent name of a joystick */
+const char *SDL_SYS_JoystickName(int index)
+{
+ if (index == 0)
+ {
+ return "RISC OS Joystick 0";
+ }
+
+ SDL_SetError("No joystick available with that index");
+ return(NULL);
+}
+
+/* Function to open a joystick for use.
+ The joystick to open is specified by the index field of the joystick.
+ This should fill the nbuttons and naxes fields of the joystick structure.
+ It returns 0, or -1 if there is an error.
+ */
+int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
+{
+ _kernel_swi_regs regs;
+
+ if(!(joystick->hwdata=SDL_malloc(sizeof(struct joystick_hwdata))))
+ return -1;
+
+ regs.r[0] = joystick->index;
+
+ /* Don't know how to get exact count of buttons so assume max of 4 for now */
+ joystick->nbuttons=4;
+
+ joystick->nhats=0;
+ joystick->nballs=0;
+ joystick->naxes=2;
+ joystick->hwdata->joystate=0;
+
+ return 0;
+
+}
+
+/* Function to update the state of a joystick - called as a device poll.
+ * This function shouldn't update the joystick structure directly,
+ * but instead should call SDL_PrivateJoystick*() to deliver events
+ * and update joystick device state.
+ */
+void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
+{
+ _kernel_swi_regs regs;
+ regs.r[0] = joystick->index;
+
+ if (_kernel_swi(JOYSTICK_READ, &regs, &regs) == NULL)
+ {
+ int newstate = regs.r[0];
+ int oldstate = joystick->hwdata->joystate;
+ if (newstate != oldstate)
+ {
+ if ((newstate & 0xFF) != (oldstate & 0xFF))
+ {
+ int y = regs.r[0] & 0xFF;
+ /* Convert to signed values */
+ if (y >= 128) y -= 256;
+ SDL_PrivateJoystickAxis(joystick,1,-y * 256); /* Up and down opposite to result in SDL */
+ }
+ if ((newstate & 0xFF00) != (oldstate & 0xFF00))
+ {
+ int x = (regs.r[0] & 0xFF00) >> 8;
+ if (x >= 128) x -= 256;
+ SDL_PrivateJoystickAxis(joystick,0,x * 256);
+ }
+
+ if ((newstate & 0xFF0000) != (oldstate & 0xFF0000))
+ {
+ int buttons = (regs.r[0] & 0xFF0000) >> 16;
+ int oldbuttons = (oldstate & 0xFF0000) >> 16;
+ int i;
+ for (i = 0; i < joystick->nbuttons; i++)
+ {
+ if ((buttons & (1<<i)) != (oldbuttons & (1<<i)))
+ {
+ if (buttons & (1<<i)) SDL_PrivateJoystickButton(joystick,i,SDL_PRESSED);
+ else SDL_PrivateJoystickButton(joystick,i,SDL_RELEASED);
+ }
+ }
+ }
+ joystick->hwdata->joystate = newstate;
+ }
+ }
+
+ return;
+}
+
+/* Function to close a joystick after use */
+void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
+{
+ if(joystick->hwdata)
+ SDL_free(joystick->hwdata);
+ return;
+}
+
+/* Function to perform any system-specific joystick related cleanup */
+void SDL_SYS_JoystickQuit(void)
+{
+ SDL_numjoysticks=0;
+
+ return;
+}
+
+#endif /* SDL_JOYSTICK_RISCOS */