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SDL_riscosFullScreenVideo.c
802 lines (669 loc) · 23.5 KB
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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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*/
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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
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Implements RISC OS full screen display.
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*/
#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
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#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
{
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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
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} SCREENMODEBLOCK;
/* Helper functions */
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void FULLSCREEN_SetDeviceMode(_THIS);
int FULLSCREEN_SetMode(int width, int height, int bpp);
void FULLSCREEN_SetupBanks(_THIS);
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/* SDL video device functions for fullscreen mode */
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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 */
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static void FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect * rects);
static void FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects,
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SDL_Rect * rects);
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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 */
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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);
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/* Following variable is set up in riskosTask.c */
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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 */
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extern unsigned char *WIMP_CreateBuffer(int width, int height, int bpp);
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/* Fast assembler copy */
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extern void RISCOS_Put32(void *to, int pixels, int pitch, int rows,
void *from, int src_skip_bytes);
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SDL_Surface *
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FULLSCREEN_SetVideoMode(_THIS, SDL_Surface * current,
int width, int height, int bpp, Uint32 flags)
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{
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_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:
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SDL_SetError("Pixel depth not supported");
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return NULL;
break;
}
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if (FULLSCREEN_SetMode(width, height, bpp) == 0) {
SDL_SetError("Couldn't set requested mode");
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return (NULL);
}
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/* printf("Setting mode %dx%d\n", width, height); */
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/* Allocate the new pixel format for the screen */
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if (!SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0)) {
RISCOS_RestoreWimpMode();
SDL_SetError("Couldn't allocate new pixel format for requested mode");
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return (NULL);
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}
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/* 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
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_kernel_swi(OS_ReadModeVariable, ®s, ®s);
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current->pitch = regs.r[2];
if (flags & SDL_DOUBLEBUF) {
regs.r[0] = 2; /* Screen area */
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_kernel_swi(OS_ReadDynamicArea, ®s, ®s);
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/* 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];
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if (_kernel_swi(OS_ChangeDynamicArea, ®s, ®s) != NULL) {
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/* 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) {
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FULLSCREEN_SetWriteBank(0);
FULLSCREEN_SetDisplayBank(1);
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create_back_buffer = 0; /* Don't need a back buffer for a double buffered display */
}
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FULLSCREEN_SetupBanks(this);
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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
*/
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if (riscos_backbuffer == 3)
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this->hidden->bank[0] = WIMP_CreateBuffer(width, height, bpp);
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else
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this->hidden->bank[0] = SDL_malloc(height * current->pitch);
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if (this->hidden->bank[0] == 0) {
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RISCOS_RestoreWimpMode();
SDL_SetError("Couldnt allocate memory for back buffer");
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return (NULL);
}
/* Surface updated in programs is now a software surface */
current->flags &= ~SDL_HWSURFACE;
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}
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/* Store address of allocated screen bank to be freed later */
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if (this->hidden->alloc_bank)
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SDL_free(this->hidden->alloc_bank);
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if (create_back_buffer) {
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this->hidden->alloc_bank = this->hidden->bank[0];
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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 */
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}
} else
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this->hidden->alloc_bank = 0;
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// 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 */
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FULLSCREEN_SetDeviceMode(this);
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/* FULLSCREEN_DisableEscape(); */
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/* We're done */
return (current);
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}
/* Reset any device functions that have been changed because we have run in WIMP mode */
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void
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FULLSCREEN_SetDeviceMode(_THIS)
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{
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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 */
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;
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}
/* Query for the list of available video modes */
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void
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FULLSCREEN_BuildModeList(_THIS)
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{
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_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 */
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_kernel_swi(OS_ScreenMode, ®s, ®s);
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num_modes = -regs.r[2];
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/* 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) {
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SDL_OutOfMemory();
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return;
}
/* Read mode information into block */
regs.r[2] = 0;
regs.r[6] = (int) enumInfo;
regs.r[7] = -regs.r[7];
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_kernel_swi(OS_ScreenMode, ®s, ®s);
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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 */
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FULLSCREEN_AddMode(this, 8, blockInfo[2], blockInfo[3]);
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break;
case 4: /* 15 bits per pixel */
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FULLSCREEN_AddMode(this, 15, blockInfo[2], blockInfo[3]);
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break;
case 5: /* 32 bits per pixel */
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FULLSCREEN_AddMode(this, 32, blockInfo[2], blockInfo[3]);
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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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}
}
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}
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static int
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FULLSCREEN_FlipHWSurface(_THIS, SDL_Surface * surface)
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{
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_kernel_swi_regs regs;
regs.r[0] = 19;
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FULLSCREEN_SetDisplayBank(this->hidden->current_bank);
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this->hidden->current_bank ^= 1;
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FULLSCREEN_SetWriteBank(this->hidden->current_bank);
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surface->pixels = this->hidden->bank[this->hidden->current_bank];
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/* Wait for Vsync */
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_kernel_swi(OS_Byte, ®s, ®s);
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return (0);
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}
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/* Nothing to do if we are writing direct to hardware */
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static void
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FULLSCREEN_UpdateRects(_THIS, int numrects, SDL_Rect * rects)
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{
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}
/* Safe but slower Memory copy from our allocated back buffer */
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static void
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FULLSCREEN_UpdateRectsMemCpy(_THIS, int numrects, SDL_Rect * rects)
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{
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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. */
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static void
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FULLSCREEN_UpdateRects8bpp(_THIS, int numrects, SDL_Rect * rects)
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{
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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;
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RISCOS_Put32(to, (width_bytes >> 2), pitch, (int) rects->h, from,
src_skip_bytes);
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rects++;
}
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}
/* Use optimized assembler memory copy. Deliberately copies extra columns if
necessary to ensure the rectangle is word aligned. */
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static void
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FULLSCREEN_UpdateRects16bpp(_THIS, int numrects, SDL_Rect * rects)
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{
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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;
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RISCOS_Put32(to, (width_bytes >> 2), pitch, (int) rects->h, from,
src_skip_bytes);
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rects++;
}
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}
/* Use optimized assembler memory copy. 32 bpp modes are always word aligned */
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static void
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FULLSCREEN_UpdateRects32bpp(_THIS, int numrects, SDL_Rect * rects)
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{
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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;
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RISCOS_Put32(to, width, pitch, (int) rects->h, from,
pitch - (width << 2));
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rects++;
}
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}
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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. */
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static void
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FULLSCREEN_UpdateRectsOS(_THIS, int numrects, SDL_Rect * rects)
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{
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_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 */
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_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);
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regs.r[3] = 0;
regs.r[4] = 0;
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if ((err = _kernel_swi(OS_SpriteOp, ®s, ®s)) != 0) {
printf("OS_SpriteOp failed \n%s\n", err->errmess);
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}
rects++;
/* Reset to full screen clipping */
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_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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}
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}
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int
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FULLSCREEN_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color * colors)
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{
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_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;
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_kernel_swi(ColourTrans_ReadPalette, ®s, ®s);
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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;
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_kernel_swi(ColourTrans_WritePalette, ®s, ®s);
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return (1);
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}
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static int
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cmpmodes(const void *va, const void *vb)
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{
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SDL_Rect *a = *(SDL_Rect **) va;
SDL_Rect *b = *(SDL_Rect **) vb;
if (a->w == b->w)
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return b->h - a->h;
else
return b->w - a->w;
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}
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static int
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FULLSCREEN_AddMode(_THIS, int bpp, int w, int h)
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{
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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) {
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SDL_OutOfMemory();
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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 *));
611
if (SDL_modelist[index] == NULL) {
612
SDL_OutOfMemory();
613
SDL_nummodes[index] = 0;
614
SDL_free(mode);
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617
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619
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621
return (-1);
}
SDL_modelist[index][next_mode] = mode;
SDL_modelist[index][next_mode + 1] = NULL;
SDL_nummodes[index]++;
return (0);
622
623
}
624
void
625
FULLSCREEN_SetWriteBank(int bank)
626
{
627
628
629
_kernel_swi_regs regs;
regs.r[0] = 112;
regs.r[1] = bank + 1;
630
_kernel_swi(OS_Byte, ®s, ®s);
631
632
}
633
void
634
FULLSCREEN_SetDisplayBank(int bank)
635
{
636
637
638
_kernel_swi_regs regs;
regs.r[0] = 113;
regs.r[1] = bank + 1;
639
_kernel_swi(OS_Byte, ®s, ®s);
640
641
642
643
}
/** Disable special escape key processing */
644
static void
645
FULLSCREEN_DisableEscape()
646
{
647
648
649
650
_kernel_swi_regs regs;
regs.r[0] = 229;
regs.r[1] = 1;
regs.r[2] = 0;
651
_kernel_swi(OS_Byte, ®s, ®s);
652
653
654
655
}
/** Enable special escape key processing */
656
static void
657
FULLSCREEN_EnableEscape()
658
{
659
660
661
662
_kernel_swi_regs regs;
regs.r[0] = 229;
regs.r[1] = 0;
regs.r[2] = 0;
663
_kernel_swi(OS_Byte, ®s, ®s);
664
665
666
667
}
/** Store caption in case this is called before we create a window */
668
void
669
FULLSCREEN_SetWMCaption(_THIS, const char *title, const char *icon)
670
{
671
672
SDL_strlcpy(this->hidden->title, title,
SDL_arraysize(this->hidden->title));
673
674
675
676
677
678
679
}
/* Set screen mode
*
* Returns 1 if mode is set ok, otherwise 0
*/
680
int
681
FULLSCREEN_SetMode(int width, int height, int bpp)
682
{
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
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:
712
SDL_SetError("Pixel depth not supported");
713
714
715
716
717
718
719
720
721
return 0;
break;
}
smb.frame_rate = -1;
regs.r[0] = 0;
regs.r[1] = (int) &smb;
722
723
if (_kernel_swi(OS_ScreenMode, ®s, ®s) != 0) {
SDL_SetError("Couldn't set requested mode");
724
725
726
727
return 0;
}
/* Turn cursor off */
728
729
730
731
732
733
734
735
736
737
738
_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);
739
740
return 1;
741
742
743
}
/* Get Start addresses for the screen banks */
744
void
745
FULLSCREEN_SetupBanks(_THIS)
746
{
747
748
749
750
751
752
753
754
755
756
_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;
757
_kernel_swi(OS_ReadVduVariables, ®s, ®s);
758
759
760
761
762
this->hidden->bank[0] = (void *) block[0];
this->hidden->bank[1] = (void *) block[1];
this->hidden->xeig = block[2];
this->hidden->yeig = block[3];
763
764
765
766
}
/* Toggle to full screen mode from the WIMP */
767
int
768
FULLSCREEN_ToggleFromWimp(_THIS)
769
{
770
771
772
int width = this->screen->w;
int height = this->screen->h;
int bpp = this->screen->format->BitsPerPixel;
773
774
775
RISCOS_StoreWimpMode();
if (FULLSCREEN_SetMode(width, height, bpp)) {
776
777
778
779
char *buffer = this->hidden->alloc_bank; /* This is start of sprite data */
/* Support back buffer mode only */
if (riscos_backbuffer == 0)
riscos_backbuffer = 1;
780
781
FULLSCREEN_SetupBanks(this);
782
783
784
785
this->hidden->bank[0] = buffer + 60; /* Start of sprite data */
if (bpp == 8)
this->hidden->bank[0] += 2048; /* 8bpp sprite have palette first */
786
787
788
this->hidden->current_bank = 0;
this->screen->pixels = this->hidden->bank[0];
789
790
/* Copy back buffer to screen memory */
791
792
SDL_memcpy(this->hidden->bank[1], this->hidden->bank[0],
width * height * this->screen->format->BytesPerPixel);
793
794
FULLSCREEN_SetDeviceMode(this);
795
796
return 1;
} else
797
RISCOS_RestoreWimpMode();
798
799
return 0;
800
}
801
802
/* vi: set ts=4 sw=4 expandtab: */