SDL_riscosFullScreenVideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2004 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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File added by Alan Buckley (alan_baa@hotmail.com) for RISC OS compatability
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27 March 2003
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Implements RISC OS full screen display.
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*/
#include "SDL.h"
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#include "SDL_stdlib.h"
#include "SDL_string.h"
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#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"
#include "unixlib/os.h"
#include "unixlib/local.h"
/* Private structures */
typedef struct tagScreenModeBlock
{
int flags; // mode selector flags, bit 0 = 1, bit 1-7 format specifier, 8-31 reserved
int x_pixels;
int y_pixels;
int pixel_depth; // 2^pixel_depth = bpp,i.e. 0 = 1, 1 = 2, 4 = 16, 5 = 32
int frame_rate; // -1 use first match
int mode_vars[5]; // array of index, value pairs terminated by -1
} SCREENMODEBLOCK;
/* Helper functions */
void FULLSCREEN_SetDeviceMode(_THIS);
int FULLSCREEN_SetMode(int width, int height, int bpp);
void FULLSCREEN_SetupBanks(_THIS);
/* SDL video device functions for fullscreen mode */
static int FULLSCREEN_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
static int FULLSCREEN_FlipHWSurface(_THIS, SDL_Surface *surface);
void FULLSCREEN_SetWMCaption(_THIS, const char *title, const char *icon);
extern int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info);
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/* UpdateRects variants */
static void FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
static void FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects, SDL_Rect *rects);
static void FULLSCREEN_UpdateRects8bpp(_THIS, int numrects, SDL_Rect *rects);
static void FULLSCREEN_UpdateRects16bpp(_THIS, int numrects, SDL_Rect *rects);
static void FULLSCREEN_UpdateRects32bpp(_THIS, int numrects, SDL_Rect *rects);
static void FULLSCREEN_UpdateRectsOS(_THIS, int numrects, SDL_Rect *rects);
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/* Local helper functions */
static int cmpmodes(const void *va, const void *vb);
static int FULLSCREEN_AddMode(_THIS, int bpp, int w, int h);
void FULLSCREEN_SetWriteBank(int bank);
void FULLSCREEN_SetDisplayBank(int bank);
static void FULLSCREEN_DisableEscape();
static void FULLSCREEN_EnableEscape();
void FULLSCREEN_BuildModeList(_THIS);
/* Following variable is set up in riskosTask.c */
extern int riscos_backbuffer; /* Create a back buffer in system memory for full screen mode */
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/* Following is used to create a sprite back buffer */
extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp);
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/* Fast assembler copy */
extern void RISCOS_Put32(void *to, int pixels, int pitch, int rows, void *from, int src_skip_bytes);
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SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface *current,
int width, int height, int bpp, Uint32 flags)
{
_kernel_swi_regs regs;
Uint32 Rmask = 0;
Uint32 Gmask = 0;
Uint32 Bmask = 0;
int create_back_buffer = riscos_backbuffer;
switch(bpp)
{
case 8:
flags |= SDL_HWPALETTE;
break;
case 15:
case 16:
Bmask = 0x00007c00;
Gmask = 0x000003e0;
Rmask = 0x0000001f;
break;
case 32:
Bmask = 0x00ff0000;
Gmask = 0x0000ff00;
Rmask = 0x000000ff;
break;
default:
SDL_SetError("Pixel depth not supported");
return NULL;
break;
}
if (FULLSCREEN_SetMode(width, height, bpp) == 0)
{
SDL_SetError("Couldn't set requested mode");
return (NULL);
}
/* 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) ) {
RISCOS_RestoreWimpMode();
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;
regs.r[0] = -1; /* -1 for current screen mode */
/* Get screen width in bytes */
regs.r[1] = 6; // Screen Width in bytes
_kernel_swi(OS_ReadModeVariable, ®s, ®s);
current->pitch = regs.r[2];
if (flags & SDL_DOUBLEBUF)
{
regs.r[0] = 2; /* Screen area */
_kernel_swi(OS_ReadDynamicArea, ®s, ®s);
/* Reg 1 has amount of memory currently used for display */
regs.r[0] = 2; /* Screen area */
regs.r[1] = (current->pitch * height * 2) - regs.r[1];
if (_kernel_swi(OS_ChangeDynamicArea, ®s, ®s) != NULL)
{
/* Can't allocate enough screen memory for double buffer */
flags &= ~SDL_DOUBLEBUF;
}
}
current->flags = flags | SDL_FULLSCREEN | SDL_HWSURFACE | SDL_PREALLOC;
/* Need to set display banks here for double buffering */
if (flags & SDL_DOUBLEBUF)
{
FULLSCREEN_SetWriteBank(0);
FULLSCREEN_SetDisplayBank(1);
create_back_buffer = 0; /* Don't need a back buffer for a double buffered display */
}
FULLSCREEN_SetupBanks(this);
if (create_back_buffer)
{
/* If not double buffered we may need to create a memory
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** back buffer to simulate processing on other OSes.
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** This is turned on by setting the enviromental variable
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** SDL$<name>$BackBuffer >= 1
*/
if (riscos_backbuffer == 3)
this->hidden->bank[0] = WIMP_CreateBuffer(width, height, bpp);
else
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this->hidden->bank[0] = SDL_malloc(height * current->pitch);
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if (this->hidden->bank[0] == 0)
{
RISCOS_RestoreWimpMode();
SDL_SetError("Couldnt allocate memory for back buffer");
return (NULL);
}
/* Surface updated in programs is now a software surface */
current->flags &= ~SDL_HWSURFACE;
}
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/* Store address of allocated screen bank to be freed later */
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if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank);
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if (create_back_buffer)
{
this->hidden->alloc_bank = this->hidden->bank[0];
if (riscos_backbuffer == 3)
{
this->hidden->bank[0] += 60; /* Start of sprite data */
if (bpp == 8) this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
}
} else
this->hidden->alloc_bank = 0;
// Clear both banks to black
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SDL_memset(this->hidden->bank[0], 0, height * current->pitch);
SDL_memset(this->hidden->bank[1], 0, height * current->pitch);
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this->hidden->current_bank = 0;
current->pixels = this->hidden->bank[0];
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/* Have to set the screen here, so SetDeviceMode will pick it up */
this->screen = current;
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/* Reset device functions for the wimp */
FULLSCREEN_SetDeviceMode(this);
/* FULLSCREEN_DisableEscape(); */
/* We're done */
return(current);
}
/* Reset any device functions that have been changed because we have run in WIMP mode */
void FULLSCREEN_SetDeviceMode(_THIS)
{
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/* Update rects is different if we have a backbuffer */
if (riscos_backbuffer && (this->screen->flags & SDL_DOUBLEBUF) == 0)
{
switch(riscos_backbuffer)
{
case 2: /* ARM code full word copy */
switch(this->screen->format->BytesPerPixel)
{
case 1: /* 8bpp modes */
this->UpdateRects = FULLSCREEN_UpdateRects8bpp;
break;
case 2: /* 15/16bpp modes */
this->UpdateRects = FULLSCREEN_UpdateRects16bpp;
break;
case 4: /* 32 bpp modes */
this->UpdateRects = FULLSCREEN_UpdateRects32bpp;
break;
default: /* Just default to the memcpy routine */
this->UpdateRects = FULLSCREEN_UpdateRectsMemCpy;
break;
}
break;
case 3: /* Use OS sprite plot routine */
this->UpdateRects = FULLSCREEN_UpdateRectsOS;
break;
default: /* Old but safe memcpy */
this->UpdateRects = FULLSCREEN_UpdateRectsMemCpy;
break;
}
} else
this->UpdateRects = FULLSCREEN_UpdateRects; /* Default do nothing implementation */
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this->SetColors = FULLSCREEN_SetColors;
this->FlipHWSurface = FULLSCREEN_FlipHWSurface;
this->SetCaption = FULLSCREEN_SetWMCaption;
this->SetIcon = NULL;
this->IconifyWindow = NULL;
this->ShowWMCursor = RISCOS_ShowWMCursor;
this->WarpWMCursor = FULLSCREEN_WarpWMCursor;
this->PumpEvents = FULLSCREEN_PumpEvents;
}
/* Query for the list of available video modes */
void FULLSCREEN_BuildModeList(_THIS)
{
_kernel_swi_regs regs;
char *enumInfo = NULL;
char *enum_ptr;
int *blockInfo;
int j;
int num_modes;
/* Find out how much space we need */
regs.r[0] = 2; /* Reason code */
regs.r[2] = 0; /* Number of modes to skip */
regs.r[6] = 0; /* pointer to block or 0 for count */
regs.r[7] = 0; /* Size of block in bytes */
_kernel_swi(OS_ScreenMode, ®s, ®s);
num_modes = -regs.r[2];
/* Video memory should be in r[5] */
this->info.video_mem = regs.r[5]/1024;
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enumInfo = (unsigned char *)SDL_malloc(-regs.r[7]);
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if (enumInfo == NULL)
{
SDL_OutOfMemory();
return;
}
/* Read mode information into block */
regs.r[2] = 0;
regs.r[6] = (int)enumInfo;
regs.r[7] = -regs.r[7];
_kernel_swi(OS_ScreenMode, ®s, ®s);
enum_ptr = enumInfo;
for (j =0; j < num_modes;j++)
{
blockInfo = (int *)enum_ptr;
if ((blockInfo[1] & 255) == 1) /* We understand this format */
{
switch(blockInfo[4])
{
case 3: /* 8 bits per pixel */
FULLSCREEN_AddMode(this, 8, blockInfo[2], blockInfo[3]);
break;
case 4: /* 15 bits per pixel */
FULLSCREEN_AddMode(this, 15, blockInfo[2], blockInfo[3]);
break;
case 5: /* 32 bits per pixel */
FULLSCREEN_AddMode(this, 32, blockInfo[2], blockInfo[3]);
break;
}
}
enum_ptr += blockInfo[0];
}
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SDL_free(enumInfo);
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/* Sort the mode lists */
for ( j=0; j<NUM_MODELISTS; ++j ) {
if ( SDL_nummodes[j] > 0 ) {
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SDL_qsort(SDL_modelist[j], SDL_nummodes[j], sizeof *SDL_modelist[j], cmpmodes);
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}
}
}
static int FULLSCREEN_FlipHWSurface(_THIS, SDL_Surface *surface)
{
_kernel_swi_regs regs;
regs.r[0] = 19;
FULLSCREEN_SetDisplayBank(this->hidden->current_bank);
this->hidden->current_bank ^= 1;
FULLSCREEN_SetWriteBank(this->hidden->current_bank);
surface->pixels = this->hidden->bank[this->hidden->current_bank];
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/* Wait for Vsync */
_kernel_swi(OS_Byte, ®s, ®s);
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return(0);
}
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/* Nothing to do if we are writing direct to hardware */
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static void FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
{
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}
/* Safe but slower Memory copy from our allocated back buffer */
static void FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects, SDL_Rect *rects)
{
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int j;
char *to, *from;
int pitch = this->screen->pitch;
int row;
int xmult = this->screen->format->BytesPerPixel;
for (j = 0; j < numrects; j++)
{
from = this->hidden->bank[0] + rects->x * xmult + rects->y * pitch;
to = this->hidden->bank[1] + rects->x * xmult + rects->y * pitch;
for (row = 0; row < rects->h; row++)
{
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SDL_memcpy(to, from, rects->w * xmult);
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from += pitch;
to += pitch;
}
rects++;
}
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}
/* Use optimized assembler memory copy. Deliberately copies extra columns if
necessary to ensure the rectangle is word aligned. */
static void FULLSCREEN_UpdateRects8bpp(_THIS, int numrects, SDL_Rect *rects)
{
int j;
char *to, *from;
int pitch = this->screen->pitch;
int width_bytes;
int src_skip_bytes;
for (j = 0; j < numrects; j++)
{
from = this->hidden->bank[0] + rects->x + rects->y * pitch;
to = this->hidden->bank[1] + rects->x + rects->y * pitch;
width_bytes = rects->w;
if ((int)from & 3)
{
int extra = ((int)from & 3);
from -= extra;
to -= extra;
width_bytes += extra;
}
if (width_bytes & 3) width_bytes += 4 - (width_bytes & 3);
src_skip_bytes = pitch - width_bytes;
RISCOS_Put32(to, (width_bytes >> 2), pitch, (int)rects->h, from, src_skip_bytes);
rects++;
}
}
/* Use optimized assembler memory copy. Deliberately copies extra columns if
necessary to ensure the rectangle is word aligned. */
static void FULLSCREEN_UpdateRects16bpp(_THIS, int numrects, SDL_Rect *rects)
{
int j;
char *to, *from;
int pitch = this->screen->pitch;
int width_bytes;
int src_skip_bytes;
for (j = 0; j < numrects; j++)
{
from = this->hidden->bank[0] + (rects->x << 1) + rects->y * pitch;
to = this->hidden->bank[1] + (rects->x << 1) + rects->y * pitch;
width_bytes = (((int)rects->w) << 1);
if ((int)from & 3)
{
from -= 2;
to -= 2;
width_bytes += 2;
}
if (width_bytes & 3) width_bytes += 2;
src_skip_bytes = pitch - width_bytes;
RISCOS_Put32(to, (width_bytes >> 2), pitch, (int)rects->h, from, src_skip_bytes);
rects++;
}
}
/* Use optimized assembler memory copy. 32 bpp modes are always word aligned */
static void FULLSCREEN_UpdateRects32bpp(_THIS, int numrects, SDL_Rect *rects)
{
int j;
char *to, *from;
int pitch = this->screen->pitch;
int width;
for (j = 0; j < numrects; j++)
{
from = this->hidden->bank[0] + (rects->x << 2) + rects->y * pitch;
to = this->hidden->bank[1] + (rects->x << 2) + rects->y * pitch;
width = (int)rects->w ;
RISCOS_Put32(to, width, pitch, (int)rects->h, from, pitch - (width << 2));
rects++;
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/* Use operating system sprite plots. Currently this is much slower than the
other variants however accelerated sprite plotting can be seen on the horizon
so this prepares for it. */
static void FULLSCREEN_UpdateRectsOS(_THIS, int numrects, SDL_Rect *rects)
{
_kernel_swi_regs regs;
_kernel_oserror *err;
int j;
int y;
regs.r[0] = 28 + 512;
regs.r[1] = (unsigned int)this->hidden->alloc_bank;
regs.r[2] = (unsigned int)this->hidden->alloc_bank+16;
regs.r[5] = 0;
for (j = 0; j < numrects; j++)
{
y = this->screen->h - rects->y; /* top of clipping region */
_kernel_oswrch(24); /* Set graphics clip region */
_kernel_oswrch((rects->x << this->hidden->xeig) & 0xFF); /* left */
_kernel_oswrch(((rects->x << this->hidden->xeig) >> 8) & 0xFF);
_kernel_oswrch(((y - rects->h) << this->hidden->yeig) & 0xFF); /* bottom */
_kernel_oswrch((((y - rects->h) << this->hidden->yeig)>> 8) & 0xFF);
_kernel_oswrch(((rects->x + rects->w - 1) << this->hidden->xeig) & 0xFF); /* right */
_kernel_oswrch((((rects->x + rects->w - 1)<< this->hidden->xeig) >> 8) & 0xFF);
_kernel_oswrch(((y-1) << this->hidden->yeig) & 0xFF); /* top */
_kernel_oswrch((((y-1) << this->hidden->yeig) >> 8) & 0xFF);
regs.r[3] = 0;
regs.r[4] = 0;
if ((err = _kernel_swi(OS_SpriteOp, ®s, ®s)) != 0)
{
printf("OS_SpriteOp failed \n%s\n",err->errmess);
}
rects++;
/* Reset to full screen clipping */
_kernel_oswrch(24); /* Set graphics clip region */
_kernel_oswrch(0); /* left */
_kernel_oswrch(0);
_kernel_oswrch(0); /* bottom */
_kernel_oswrch(0);
_kernel_oswrch(((this->screen->w-1) << this->hidden->xeig) & 0xFF); /* right */
_kernel_oswrch((((this->screen->w-1) << this->hidden->xeig) >> 8) & 0xFF);
_kernel_oswrch(((this->screen->h-1) << this->hidden->yeig) & 0xFF); /* top */
_kernel_oswrch((((this->screen->h-1) << this->hidden->yeig) >> 8) & 0xFF);
}
}
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int FULLSCREEN_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
_kernel_swi_regs regs;
int palette[256];
regs.r[0] = -1;
regs.r[1] = -1;
regs.r[2] = (int)palette;
regs.r[3] = 1024;
regs.r[4] = 0;
_kernel_swi(ColourTrans_ReadPalette, ®s, ®s);
while(ncolors--)
{
palette[firstcolor] = ((colors->b) << 24) | ((colors->g) << 16) | ((colors->r) << 8);
firstcolor++;
colors++;
}
regs.r[0] = -1;
regs.r[1] = -1;
regs.r[2] = (int)palette;
regs.r[3] = 0;
regs.r[4] = 0;
_kernel_swi(ColourTrans_WritePalette, ®s, ®s);
return(1);
}
static int cmpmodes(const void *va, const void *vb)
{
SDL_Rect *a = *(SDL_Rect **)va;
SDL_Rect *b = *(SDL_Rect **)vb;
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if(a->w == b->w)
return b->h - a->h;
else
return b->w - a->w;
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}
static int FULLSCREEN_AddMode(_THIS, int bpp, int w, int h)
{
SDL_Rect *mode;
int i, index;
int next_mode;
/* Check to see if we already have this mode */
if ( bpp < 8 ) { /* Not supported */
return(0);
}
index = ((bpp+7)/8)-1;
for ( i=0; i<SDL_nummodes[index]; ++i ) {
mode = SDL_modelist[index][i];
if ( (mode->w == w) && (mode->h == h) ) {
return(0);
}
}
/* Set up the new video mode rectangle */
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mode = (SDL_Rect *)SDL_malloc(sizeof *mode);
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if ( mode == NULL ) {
SDL_OutOfMemory();
return(-1);
}
mode->x = 0;
mode->y = 0;
mode->w = w;
mode->h = h;
/* Allocate the new list of modes, and fill in the new mode */
next_mode = SDL_nummodes[index];
SDL_modelist[index] = (SDL_Rect **)
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SDL_realloc(SDL_modelist[index], (1+next_mode+1)*sizeof(SDL_Rect *));
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if ( SDL_modelist[index] == NULL ) {
SDL_OutOfMemory();
SDL_nummodes[index] = 0;
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SDL_free(mode);
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return(-1);
}
SDL_modelist[index][next_mode] = mode;
SDL_modelist[index][next_mode+1] = NULL;
SDL_nummodes[index]++;
return(0);
}
void FULLSCREEN_SetWriteBank(int bank)
{
_kernel_swi_regs regs;
regs.r[0] = 112;
regs.r[1] = bank+1;
_kernel_swi(OS_Byte, ®s, ®s);
}
void FULLSCREEN_SetDisplayBank(int bank)
{
_kernel_swi_regs regs;
regs.r[0] = 113;
regs.r[1] = bank+1;
_kernel_swi(OS_Byte, ®s, ®s);
}
/** Disable special escape key processing */
static void FULLSCREEN_DisableEscape()
{
_kernel_swi_regs regs;
regs.r[0] = 229;
regs.r[1] = 1;
regs.r[2] = 0;
_kernel_swi(OS_Byte, ®s, ®s);
}
/** Enable special escape key processing */
static void FULLSCREEN_EnableEscape()
{
_kernel_swi_regs regs;
regs.r[0] = 229;
regs.r[1] = 0;
regs.r[2] = 0;
_kernel_swi(OS_Byte, ®s, ®s);
}
/** Store caption in case this is called before we create a window */
void FULLSCREEN_SetWMCaption(_THIS, const char *title, const char *icon)
{
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SDL_strncpy(this->hidden->title, title, 255);
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this->hidden->title[255] = 0;
}
/* Set screen mode
*
* Returns 1 if mode is set ok, otherwise 0
*/
int FULLSCREEN_SetMode(int width, int height, int bpp)
{
SCREENMODEBLOCK smb;
_kernel_swi_regs regs;
smb.flags = 1;
smb.x_pixels = width;
smb.y_pixels = height;
smb.mode_vars[0] = -1;
switch(bpp)
{
case 8:
smb.pixel_depth = 3;
/* Note: Need to set ModeFlags to 128 and NColour variables to 255 get full 8 bit palette */
smb.mode_vars[0] = 0; smb.mode_vars[1] = 128; /* Mode flags */
smb.mode_vars[2] = 3; smb.mode_vars[3] = 255; /* NColour (number of colours -1) */
smb.mode_vars[4] = -1; /* End of list */
break;
case 15:
case 16:
smb.pixel_depth = 4;
break;
case 32:
smb.pixel_depth = 5;
break;
default:
SDL_SetError("Pixel depth not supported");
return 0;
break;
}
smb.frame_rate = -1;
regs.r[0] = 0;
regs.r[1] = (int)&smb;
if (_kernel_swi(OS_ScreenMode, ®s, ®s) != 0)
{
SDL_SetError("Couldn't set requested mode");
return 0;
}
/* Turn cursor off*/
_kernel_oswrch(23);_kernel_oswrch(1);_kernel_oswrch(0);
_kernel_oswrch(0);_kernel_oswrch(0);_kernel_oswrch(0);
_kernel_oswrch(0);_kernel_oswrch(0);_kernel_oswrch(0);
_kernel_oswrch(0);_kernel_oswrch(0);
return 1;
}
/* Get Start addresses for the screen banks */
void FULLSCREEN_SetupBanks(_THIS)
{
_kernel_swi_regs regs;
int block[5];
block[0] = 148; /* Write screen start */
block[1] = 149; /* Display screen start */
block[2] = 4; /* X eig factor */
block[3] = 5; /* Y eig factor */
block[4] = -1; /* End of list of variables to request */
regs.r[0] = (int)block;
regs.r[1] = (int)block;
_kernel_swi(OS_ReadVduVariables, ®s, ®s);
this->hidden->bank[0] = (void *)block[0];
this->hidden->bank[1] = (void *)block[1];
this->hidden->xeig = block[2];
this->hidden->yeig = block[3];
}
/* Toggle to full screen mode from the WIMP */
int FULLSCREEN_ToggleFromWimp(_THIS)
{
int width = this->screen->w;
int height = this->screen->h;
int bpp = this->screen->format->BitsPerPixel;
RISCOS_StoreWimpMode();
if (FULLSCREEN_SetMode(width, height, bpp))
{
char *buffer = this->hidden->alloc_bank; /* This is start of sprite data */
/* Support back buffer mode only */
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if (riscos_backbuffer == 0) riscos_backbuffer = 1;
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FULLSCREEN_SetupBanks(this);
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->current_bank = 0;
this->screen->pixels = this->hidden->bank[0];
/* Copy back buffer to screen memory */
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SDL_memcpy(this->hidden->bank[1], this->hidden->bank[0], width * height * this->screen->format->BytesPerPixel);
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FULLSCREEN_SetDeviceMode(this);
return 1;
} else
RISCOS_RestoreWimpMode();
return 0;
}