--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/video/riscos/SDL_wimpvideo.c	Thu May 29 04:44:13 2003 +0000
@@ -0,0 +1,492 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001  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@devolution.com
+*/
+
+/*
+     File added by Alan Buckley (alan_baa@hotmail.com) for RISCOS compatability
+	 27 March 2003
+
+     Implements RISCOS wimp display.
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL.h"
+#include "SDL_error.h"
+#include "SDL_video.h"
+#include "SDL_mouse.h"
+#include "SDL_sysvideo.h"
+#include "SDL_pixels_c.h"
+#include "SDL_events_c.h"
+
+#include "SDL_riscostask.h"
+#include "SDL_riscosvideo.h"
+#include "SDL_riscosevents_c.h"
+#include "SDL_riscosmouse_c.h"
+
+#include "kernel.h"
+#include "swis.h"
+
+/* Initialization/Query functions */
+SDL_Rect **WIMP_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
+SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
+int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
+void WIMP_SetWMCaption(_THIS, const char *title, const char *icon);
+
+
+extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp);
+extern void WIMP_PumpEvents(_THIS);
+extern void WIMP_PlotSprite(_THIS, int x, int y);
+extern void WIMP_SetupPlotInfo(_THIS);
+extern void WIMP_SetFocus(int win);
+
+/* etc. */
+static void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
+
+/* RISC OS Wimp handling helpers */
+void WIMP_ReadModeInfo(_THIS);
+unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface);
+void WIMP_SetDeviceMode(_THIS);
+void WIMP_DeleteWindow(_THIS);
+
+/* FULLSCREEN function required for wimp/fullscreen toggling */
+extern int FULLSCREEN_SetMode(int width, int height, int bpp);
+
+/* Currently need to set this up here as it only works if you
+   start up in a Wimp mode */
+extern int RISCOS_ToggleFullScreen(_THIS, int fullscreen);
+
+extern int riscos_backbuffer;
+extern int mouseInWindow;
+extern int riscos_closeaction;
+
+
+SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current,
+				int width, int height, int bpp, Uint32 flags)
+{
+   Uint32 Rmask = 0;
+   Uint32 Gmask = 0;
+   Uint32 Bmask = 0;
+   char *buffer = NULL;
+   int bytesPerPixel = 1;
+
+   /* Don't support double buffering in Wimp mode */
+   flags &= ~SDL_DOUBLEBUF;
+   flags &= ~SDL_HWSURFACE;
+
+   switch(bpp)
+   {
+	case 8:
+		/* Emulated palette using ColourTrans */
+		flags |= SDL_HWPALETTE;
+		break;
+
+	case 15:
+	case 16:
+		Bmask = 0x00007c00;
+		Gmask = 0x000003e0;
+		Rmask = 0x0000001f;
+		bytesPerPixel = 2;
+		break;
+
+	case 32:
+		Bmask = 0x00ff0000;
+		Gmask = 0x0000ff00;
+		Rmask = 0x000000ff;
+		bytesPerPixel = 4;
+		break;
+
+	default:
+		SDL_SetError("Pixel depth not supported");
+		return NULL;
+		break;
+   }
+
+/* 	printf("Setting mode %dx%d\n", width, height);*/
+
+	/* Allocate the new pixel format for the screen */
+	if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) {
+		SDL_SetError("Couldn't allocate new pixel format for requested mode");
+		return(NULL);
+	}
+
+	/* Set up the new mode framebuffer */
+	current->w = width;
+	this->hidden->height = current->h = height;
+
+	if (bpp == 15) bpp = 16;
+	buffer = WIMP_CreateBuffer(width, height, bpp);
+	if (buffer == NULL)
+	{
+		SDL_SetError("Couldn't create sprite for video memory");
+		return (NULL);
+	}
+
+	this->hidden->bank[0] = buffer + 60; /* Start of sprite data */
+	if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
+
+	this->hidden->bank[1] = buffer;      /* Start of buffer */
+
+	/* Remember sprite buffer so it can be freed later */
+	if (this->hidden->alloc_bank) free(this->hidden->alloc_bank);
+	this->hidden->alloc_bank = buffer;
+
+	current->pitch = width * bytesPerPixel;
+	if ((current->pitch & 3))
+	{
+		/* Sprites are 32bit word aligned */
+		current->pitch += (4 - (current->pitch & 3));
+	}
+
+  	current->flags = flags | SDL_PREALLOC;
+
+	WIMP_ReadModeInfo(this);
+	
+    memset(this->hidden->bank[0], 0, height * current->pitch);
+
+	this->hidden->current_bank = 0;
+	current->pixels = this->hidden->bank[0];
+
+
+	if (WIMP_SetupWindow(this, current) == 0)
+	{
+		SDL_SetError("Unable to create window to display surface");
+		return NULL;
+	}
+
+	/* Reset device functions for the wimp */
+	WIMP_SetDeviceMode(this);
+
+    /* Needs to set up plot info after window has been created */
+    /* Not sure why, but plots don't work if I do it earlier */
+    WIMP_SetupPlotInfo(this);
+
+	/* We're done */
+	return(current);
+}
+
+
+void WIMP_ReadModeInfo(_THIS)
+{
+	_kernel_swi_regs regs;
+	int vars[6];
+	int vals[5];
+
+	vars[0] = 4;  /* XEig */
+	vars[1] = 5;  /* YEig */
+	vars[2] = 9;  /* Log base 2 bpp */
+	vars[3] = 11; /* Screen Width - 1 */
+	vars[4] = 12; /* Screen Depth - 1 */
+	vars[5] = -1; /* Terminate list */
+
+	regs.r[0] = (int)vars;
+	regs.r[1] = (int)vals;
+	_kernel_swi(OS_ReadVduVariables, &regs, &regs);
+	this->hidden->xeig = vals[0];
+	this->hidden->yeig = vals[1];
+	this->hidden->screen_bpp = 1 << vals[2];
+	this->hidden->screen_width = vals[3] + 1;
+	this->hidden->screen_height = vals[4] + 1;
+}
+
+/* Set device function to call the correct versions for running
+   in a wimp window */
+
+void WIMP_SetDeviceMode(_THIS)
+{
+	if (this->UpdateRects == WIMP_UpdateRects) return; /* Already set up */
+
+	this->SetColors   = WIMP_SetColors;
+	this->UpdateRects = WIMP_UpdateRects;
+
+	this->FlipHWSurface = NULL;
+
+	this->SetCaption = WIMP_SetWMCaption;
+	this->SetIcon = NULL;
+	this->IconifyWindow = NULL;
+	
+	this->ShowWMCursor = WIMP_ShowWMCursor;
+	this->WarpWMCursor = WIMP_WarpWMCursor;
+
+        this->ToggleFullScreen = RISCOS_ToggleFullScreen;
+
+	this->PumpEvents = WIMP_PumpEvents;	
+}
+
+/* Setup the Window to display the surface */
+unsigned int WIMP_SetupWindow(_THIS, SDL_Surface *surface)
+{
+	_kernel_swi_regs regs;
+	int window_data[23];
+    int	*window_block = window_data+1;
+	int x = (this->hidden->screen_width - surface->w) / 2;
+	int y = (this->hidden->screen_height - surface->h) / 2;
+	int xeig = this->hidden->xeig;
+	int yeig = this->hidden->yeig;
+
+    mouseInWindow = 0;
+    
+	/* Always delete the window and recreate on a change */
+	if (this->hidden->window_handle) WIMP_DeleteWindow(this);
+
+	/* Setup window co-ordinates */
+   window_block[0] = x << xeig;
+   window_block[1] = y << yeig;
+   window_block[2] = window_block[0] + (surface->w << xeig);
+   window_block[3] = window_block[1] + (surface->h << yeig);
+
+   
+   window_block[4] = 0;				  /* Scroll offsets */
+   window_block[5] = 0;
+   window_block[6] = -1;			  /* Open on top of window stack */
+
+   window_block[7] = 0x85040042;      /* Window flags */
+   if (riscos_closeaction != 0) window_block[7] |= 0x2000000;
+
+   /* TODO: Take into account surface->flags */
+
+   window_block[8] = 0xff070207;      /* Window colours */
+   window_block[9] = 0x000c0103;
+   window_block[10] = 0;                    /* Work area minimum */
+   window_block[11] = -surface->h << yeig;
+   window_block[12] = surface->w << xeig;   /* Work area maximum */
+   window_block[13] = 0;
+   window_block[14] = 0x2700013d;    /* Title icon flags */
+   window_block[15] = 0x00003000;	 /* Work area flags - Mouse click down reported */
+   window_block[16] = 1;             /* Sprite area control block pointer */
+   window_block[17] = 0x00100010;	 /* Minimum window size (width & height) (16x16)*/
+   window_block[18] = (int)this->hidden->title;    /* Title data */
+   window_block[19] = -1;
+   window_block[20] = 256;
+   window_block[21] = 0;			 /* Number of icons */
+
+   regs.r[1] = (unsigned int)(window_block);
+   
+   /* Create the window */
+   if (_kernel_swi(Wimp_CreateWindow, &regs, &regs) == NULL)
+   {
+	   this->hidden->window_handle = window_data[0] = regs.r[0];
+
+	   /* Show the window on the screen */
+	   regs.r[1] = (unsigned int)window_data;
+       if (_kernel_swi(Wimp_OpenWindow, &regs, &regs) == NULL)
+       {
+          WIMP_SetFocus(this->hidden->window_handle);
+       } else
+       {
+		  WIMP_DeleteWindow(this);
+	   }
+   }
+   
+   return this->hidden->window_handle;
+}
+
+/* Destroy the Window */
+
+void WIMP_DeleteWindow(_THIS)
+{
+	_kernel_swi_regs regs;
+    regs.r[1] = (unsigned int)&(this->hidden->window_handle);
+	_kernel_swi(Wimp_DeleteWindow, &regs, &regs);
+	this->hidden->window_handle = 0;
+}
+
+
+void WIMP_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
+{
+	_kernel_swi_regs regs;
+	int update_block[12];
+	int xeig = this->hidden->xeig;
+	int yeig = this->hidden->yeig;
+	int j;
+	update_block[0] = this->hidden->window_handle;
+
+	for (j = 0; j < numrects; j++)
+	{
+		update_block[1] = rects[j].x << xeig; /* Min X */
+		update_block[4] = -(rects[j].y << yeig);
+		update_block[3] = update_block[1] + (rects[j].w << xeig);
+		update_block[2] = update_block[4] - (rects[j].h << yeig);
+
+		regs.r[1] = (int)update_block;
+		/* Update window can fail if called before first poll */
+		if (_kernel_swi(Wimp_UpdateWindow, &regs, &regs) == 0)
+		{
+			while (regs.r[0])
+			{
+				WIMP_PlotSprite(this, update_block[1], update_block[2]);
+				_kernel_swi(Wimp_GetRectangle, &regs, &regs);
+			}
+		}
+	}
+}
+
+
+int WIMP_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
+{
+   unsigned int *pal = (unsigned int *)(this->hidden->bank[1]+60);
+   int j;
+   SDL_Rect update;
+
+   pal += firstcolor*2;
+   for (j = 0; j < ncolors; j++)
+   {
+      *pal = (((unsigned int)colors->r) << 8)
+             + (((unsigned int)colors->g) << 16)
+             + (((unsigned int)colors->b) << 24);
+      pal[1] = *pal;
+      pal += 2;
+      colors++;
+   }
+
+   WIMP_SetupPlotInfo(this);
+
+   /* Need to refresh the window */
+   update.x = 0;
+   update.y = 0;
+   update.w = SDL_VideoSurface->w;
+   update.h = SDL_VideoSurface->h;
+   WIMP_UpdateRects(this, 1, &update);
+      
+	return 1;
+}
+
+void WIMP_SetWMCaption(_THIS, const char *title, const char *icon)
+{
+	_kernel_swi_regs regs;
+
+	strncpy(this->hidden->title, title, 255);
+	this->hidden->title[255] = 0;
+
+	if (RISCOS_GetWimpVersion() < 380)
+	{
+		int block[6];
+
+		regs.r[1] = (int)block;
+		_kernel_swi(Wimp_GetCaretPosition, &regs, &regs);
+		if (block[0] == (int)this->hidden->window_handle)
+		{
+			regs.r[0] = -1;
+			_kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
+		} else
+		{
+			regs.r[0] = this->hidden->window_handle;
+			regs.r[1] = -1;
+			regs.r[2] = -1;
+			regs.r[3] = -1;
+			_kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
+		}
+		regs.r[0] = block[0];
+		regs.r[1] = block[1];
+		regs.r[2] = block[2];
+		regs.r[3] = block[3];
+		regs.r[4] = block[4];
+		regs.r[5] = block[5];
+		_kernel_swi(Wimp_SetCaretPosition, &regs,&regs);
+	} else
+	{
+		regs.r[0] = this->hidden->window_handle;
+		regs.r[1] = 0x4b534154; /* "TASK" */
+		regs.r[2] = 3; /* Redraw title */
+		_kernel_swi(Wimp_ForceRedraw, &regs, &regs);
+	}
+}
+
+void WIMP_RefreshDesktop(_THIS)
+{
+   int width = this->hidden->screen_width << this->hidden->xeig;
+   int height = this->hidden->screen_height << this->hidden->yeig;
+   _kernel_swi_regs regs;
+   regs.r[0] = -1; /* Whole screen */
+   regs.r[1] = 0;
+   regs.r[2] = 0;
+   regs.r[3] = width;
+   regs.r[4] = height;
+   _kernel_swi(Wimp_ForceRedraw, &regs, &regs);
+}
+
+/* Toggle to window from full screen */
+int WIMP_ToggleFromFullScreen(_THIS)
+{     
+   int width = this->screen->w;
+   int height = this->screen->h;
+   int bpp = this->screen->format->BitsPerPixel;
+   char *buffer = NULL;
+   char *old_bank[2];
+   char *old_alloc_bank;
+
+   /* Ensure flags are OK */
+   this->screen->flags &= ~(SDL_DOUBLEBUF|SDL_HWSURFACE);
+
+   if (this->hidden->bank[0] == this->hidden->alloc_bank || riscos_backbuffer == 0)
+   {
+      /* Need to create a sprite for the screen and copy the data to it */
+      char *data;
+      buffer = WIMP_CreateBuffer(width, height, bpp);
+      data = buffer + 60;         /* Start of sprite data */
+      if (bpp == 8) data += 2048;  /* 8bpp sprite have palette first */
+
+      if (buffer == NULL) return 0;
+      memcpy(data, this->hidden->bank[0], width * height * this->screen->format->BytesPerPixel);
+   }
+   /* else We've switch to full screen before so we already have a sprite */
+
+   old_bank[0] = this->hidden->bank[0];
+   old_bank[1] = this->hidden->bank[1];
+   old_alloc_bank = this->hidden->alloc_bank;
+
+   if (buffer != NULL) this->hidden->alloc_bank = buffer;
+
+   this->hidden->bank[1] = this->hidden->alloc_bank;
+   this->hidden->bank[0] = this->hidden->bank[1] + 60; /* Start of sprite data */
+   if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
+
+   this->hidden->current_bank = 0;
+   this->screen->pixels = this->hidden->bank[0];
+
+   RISCOS_RestoreWimpMode();
+   WIMP_ReadModeInfo(this);
+   if (WIMP_SetupWindow(this, this->screen))
+   {
+      WIMP_SetDeviceMode(this);
+      WIMP_SetupPlotInfo(this);
+
+      riscos_backbuffer = 1;
+
+      if (buffer && old_alloc_bank) free(old_alloc_bank);
+
+      return 1;
+   } else
+   {
+      /* Drop back to full screen mode on failure */
+      this->hidden->bank[0] = old_bank[0];
+      this->hidden->bank[1] = old_bank[1];
+      this->hidden->alloc_bank = old_alloc_bank;
+      if (buffer) free(buffer);
+      
+      RISCOS_StoreWimpMode();
+      FULLSCREEN_SetMode(width, height, bpp);
+   }
+
+   return 0;
+}