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-rw-r--r--distrib/sdl-1.2.15/src/video/riscos/SDL_riscostask.c350
1 files changed, 350 insertions, 0 deletions
diff --git a/distrib/sdl-1.2.15/src/video/riscos/SDL_riscostask.c b/distrib/sdl-1.2.15/src/video/riscos/SDL_riscostask.c
new file mode 100644
index 0000000..67dc3e2
--- /dev/null
+++ b/distrib/sdl-1.2.15/src/video/riscos/SDL_riscostask.c
@@ -0,0 +1,350 @@
+/*
+ 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 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
+*/
+#include "SDL_config.h"
+
+/*
+ This file added by Alan Buckley (alan_baa@hotmail.com) to support RISC OS
+ 26 March 2003
+
+ File includes routines for:
+ Setting up as a WIMP Task
+ Reading information about the current desktop
+ Storing information before a switch to full screen
+ Restoring desktop after switching to full screen
+*/
+
+#include "kernel.h"
+#include "swis.h"
+
+#include "SDL_stdinc.h"
+#include "SDL_riscostask.h"
+
+#if !SDL_THREADS_DISABLED
+#include <pthread.h>
+pthread_t main_thread;
+#endif
+
+/* RISC OS variables */
+
+static int task_handle = 0;
+static int wimp_version = 0;
+
+/* RISC OS variables to help compatability with certain programs */
+int riscos_backbuffer = 0; /* Create a back buffer in system memory for full screen mode */
+int riscos_closeaction = 1; /* Close icon action */
+
+static int stored_mode = -1; /* -1 when in desktop, mode number or pointer when full screen */
+
+extern int mouseInWindow; /* Mouse is in WIMP window */
+
+/* Local function */
+
+static int RISCOS_GetTaskName(char *task_name, size_t maxlen);
+
+/* Uncomment next line to copy mode changes/restores to stderr */
+/* #define DUMP_MODE */
+#ifdef DUMP_MODE
+#include "stdio.h"
+static void dump_mode()
+{
+ fprintf(stderr, "mode %d\n", stored_mode);
+ if (stored_mode < -1 || stored_mode >= 256)
+ {
+ int blockSize = 0;
+ int *storeBlock = (int *)stored_mode;
+
+ while(blockSize < 5 || storeBlock[blockSize] != -1)
+ {
+ fprintf(stderr, " %d\n", storeBlock[blockSize++]);
+ }
+ }
+}
+#endif
+
+/******************************************************************
+
+ Initialise as RISC OS Wimp task
+
+*******************************************************************/
+
+int RISCOS_InitTask()
+{
+ char task_name[32];
+ _kernel_swi_regs regs;
+ int messages[4];
+
+ if (RISCOS_GetTaskName(task_name, SDL_arraysize(task_name)) == 0) return 0;
+
+ messages[0] = 9; /* Palette changed */
+ messages[1] = 0x400c1; /* Mode changed */
+ messages[2] = 8; /* Pre quit */
+ messages[2] = 0;
+
+ regs.r[0] = (unsigned int)360; /* Minimum version 3.6 */
+ regs.r[1] = (unsigned int)0x4b534154;
+ regs.r[2] = (unsigned int)task_name;
+ regs.r[3] = (unsigned int)messages;
+
+ if (_kernel_swi(Wimp_Initialise, &regs, &regs) == 0)
+ {
+ wimp_version = regs.r[0];
+ task_handle = regs.r[1];
+ return 1;
+ }
+
+#if !SDL_THREADS_DISABLED
+ main_thread = pthread_self();
+#endif
+
+ return 0;
+}
+
+/*********************************************************************
+
+ Close down application on exit.
+
+**********************************************************************/
+
+void RISCOS_ExitTask()
+{
+ _kernel_swi_regs regs;
+
+ if (stored_mode == -1)
+ {
+ /* Ensure cursor is put back to standard pointer shape if
+ we have been running in a window */
+ _kernel_osbyte(106,1,0);
+ }
+
+ /* Ensure we end up back in the wimp */
+ RISCOS_RestoreWimpMode();
+
+ /* Neatly exit the task */
+ regs.r[0] = task_handle;
+ regs.r[1] = (unsigned int)0x4b534154;
+ _kernel_swi(Wimp_CloseDown, &regs, &regs);
+ task_handle = 0;
+}
+
+/**************************************************************************
+
+ Get the name of the task for the desktop.
+
+ Param: task_name - name of task 32 characters.
+
+ Returns: 1 is successful, otherwise 0
+
+ Notes: Works by getting using OS_GetEnv to get the command line
+ used to run the program and then parsing a name from it
+ as follows.
+
+ 1. Use name after final period if not !RunImage
+ 2. If name is !RunImage then process item before the period
+ in front of !RunImage.
+ 3. If directory name use that
+ 4. if in form <XXX$Dir> use the XXX.
+
+ Finally once this value has been retrieved use it unless
+ there is a variable set up in the form SDL$<name>$TaskName
+ in which case the value of this variable will be used.
+
+ Now also gets other RISC OS configuration varibles
+ SDL$<name>$BackBuffer - set to 1 to use a system memory backbuffer in fullscreen mode
+ so updates wait until a call to SDL_UpdateRects. (default 0)
+ This is required for programmes where they have assumed this is
+ always the case which is contrary to the documentation.
+ SDL$<name>$CloseAction
+ 0 Don't show close icon
+ 1 Show close icon
+
+***************************************************************************/
+
+int RISCOS_GetTaskName(char *task_name, size_t maxlen)
+{
+ _kernel_swi_regs regs;
+
+ task_name[0] = 0;
+
+ /* Figure out a sensible task name */
+ if (_kernel_swi(OS_GetEnv, &regs, &regs) == 0)
+ {
+ char *command_line = (char *)regs.r[0];
+ size_t len = SDL_strlen(command_line)+1;
+ char *buffer = SDL_stack_alloc(char, len);
+ char *env_var;
+ char *p;
+
+ SDL_strlcpy(buffer, command_line, len);
+ p = SDL_strchr(buffer, ' ');
+ if (p) *p = 0;
+ p = SDL_strrchr(buffer, '.');
+ if (p == 0) p = buffer;
+ if (stricmp(p+1,"!RunImage") == 0)
+ {
+ *p = 0;
+ p = SDL_strrchr(buffer, '.');
+ if (p == 0) p = buffer;
+ }
+ if (*p == '.') p++;
+ if (*p == '!') p++; /* Skip "!" at beginning of application directories */
+
+ if (*p == '<')
+ {
+ // Probably in the form <appname$Dir>
+ char *q = SDL_strchr(p, '$');
+ if (q == 0) q = SDL_strchr(p,'>'); /* Use variable name if not */
+ if (q) *q = 0;
+ p++; /* Move over the < */
+ }
+
+ if (*p)
+ {
+ /* Read variables that effect the RISC OS SDL engine for this task */
+ len = SDL_strlen(p) + 18; /* 18 is larger than the biggest variable name */
+ env_var = SDL_stack_alloc(char, len);
+ if (env_var)
+ {
+ char *env_val;
+
+ /* See if a variable of form SDL$<dirname>$TaskName exists */
+
+ SDL_strlcpy(env_var, "SDL$", len);
+ SDL_strlcat(env_var, p, len);
+ SDL_strlcat(env_var, "$TaskName", len);
+
+ env_val = SDL_getenv(env_var);
+ if (env_val) SDL_strlcpy(task_name, env_val, maxlen);
+
+ SDL_strlcpy(env_var, "SDL$", len);
+ SDL_strlcat(env_var, p, len);
+ SDL_strlcat(env_var, "$BackBuffer", len);
+
+ env_val = SDL_getenv(env_var);
+ if (env_val) riscos_backbuffer = atoi(env_val);
+
+ SDL_strlcpy(env_var, "SDL$", len);
+ SDL_strlcat(env_var, p, len);
+ SDL_strlcat(env_var, "$CloseAction", len);
+
+ env_val = SDL_getenv(env_var);
+ if (env_val && SDL_strcmp(env_val,"0") == 0) riscos_closeaction = 0;
+
+ SDL_stack_free(env_var);
+ }
+
+ if (!*task_name) SDL_strlcpy(task_name, p, maxlen);
+ }
+
+ SDL_stack_free(buffer);
+ }
+
+ if (task_name[0] == 0) SDL_strlcpy(task_name, "SDL Task", maxlen);
+
+ return 1;
+}
+
+/*****************************************************************
+
+ Store the current desktop screen mode if we are in the desktop.
+
+******************************************************************/
+
+void RISCOS_StoreWimpMode()
+{
+ _kernel_swi_regs regs;
+
+ /* Don't store if in full screen mode */
+ if (stored_mode != -1) return;
+
+ regs.r[0] = 1;
+ _kernel_swi(OS_ScreenMode, &regs, &regs);
+ if (regs.r[1] >= 0 && regs.r[1] < 256) stored_mode = regs.r[1];
+ else
+ {
+ int blockSize = 0;
+ int *retBlock = (int *)regs.r[1];
+ int *storeBlock;
+ int j;
+
+ while(blockSize < 5 || retBlock[blockSize] != -1) blockSize++;
+ blockSize++;
+ storeBlock = (int *)SDL_malloc(blockSize * sizeof(int));
+ retBlock = (int *)regs.r[1];
+ for ( j = 0; j < blockSize; j++)
+ storeBlock[j] = retBlock[j];
+
+ stored_mode = (int)storeBlock;
+ }
+#if DUMP_MODE
+ fprintf(stderr, "Stored "); dump_mode();
+#endif
+}
+
+/*****************************************************************
+
+ Restore desktop screen mode if we are in full screen mode.
+
+*****************************************************************/
+
+void RISCOS_RestoreWimpMode()
+{
+ _kernel_swi_regs regs;
+
+ /* Only need to restore if we are in full screen mode */
+ if (stored_mode == -1) return;
+
+#if DUMP_MODE
+ fprintf(stderr, "Restored"); dump_mode();
+#endif
+
+ regs.r[0] = stored_mode;
+ _kernel_swi(Wimp_SetMode, &regs, &regs);
+ if (stored_mode < 0 || stored_mode > 256)
+ {
+ SDL_free((int *)stored_mode);
+ }
+ stored_mode = -1;
+
+ /* Flush keyboard buffer to dump the keystrokes we've already polled */
+ regs.r[0] = 21;
+ regs.r[1] = 0; /* Keyboard buffer number */
+ _kernel_swi(OS_Byte, &regs, &regs);
+
+ mouseInWindow = 0;
+
+}
+
+/*********************************************************************
+
+ Get version of Wimp running when task was initialised.
+
+*********************************************************************/
+
+int RISCOS_GetWimpVersion()
+{
+ return wimp_version;
+}
+
+int RISCOS_GetTaskHandle()
+{
+ return task_handle;
+}
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