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SDL_riscosvideo.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2012 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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23 March 2003
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Implements RISC OS display device management.
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Routines for full screen and wimp modes are split
into other source files.
*/
#include "SDL_video.h"
#include "SDL_mouse.h"
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#include "SDL_syswm.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"
#define RISCOSVID_DRIVER_NAME "riscos"
/* Initialization/Query functions */
static int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat);
static void RISCOS_VideoQuit(_THIS);
static SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
static SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info);
int RISCOS_ToggleFullScreen(_THIS, int fullscreen);
/* Mouse checking */
void RISCOS_CheckMouseMode(_THIS);
extern SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode);
/* Fullscreen mode functions */
extern SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
extern void FULLSCREEN_BuildModeList(_THIS);
extern void FULLSCREEN_SetDeviceMode(_THIS);
extern int FULLSCREEN_ToggleFromWimp(_THIS);
/* Wimp mode functions */
extern SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
extern void WIMP_DeleteWindow(_THIS);
extern int WIMP_ToggleFromFullScreen(_THIS);
/* Hardware surface functions - common to WIMP and FULLSCREEN */
static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface);
static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface);
static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface);
static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface);
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/* RISC OS driver bootstrap functions */
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static int RISCOS_Available(void)
{
return(1);
}
static void RISCOS_DeleteDevice(SDL_VideoDevice *device)
{
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SDL_free(device->hidden);
SDL_free(device);
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}
static SDL_VideoDevice *RISCOS_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
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device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
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if ( device ) {
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SDL_memset(device, 0, (sizeof *device));
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device->hidden = (struct SDL_PrivateVideoData *)
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SDL_malloc((sizeof *device->hidden));
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}
if ( (device == NULL) || (device->hidden == NULL) ) {
SDL_OutOfMemory();
if ( device ) {
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SDL_free(device);
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}
return(0);
}
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SDL_memset(device->hidden, 0, (sizeof *device->hidden));
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/* Set the function pointers */
device->VideoInit = RISCOS_VideoInit;
device->VideoQuit = RISCOS_VideoQuit;
device->ListModes = RISCOS_ListModes;
device->SetVideoMode = RISCOS_SetVideoMode;
device->CreateYUVOverlay = NULL;
device->AllocHWSurface = RISCOS_AllocHWSurface;
device->CheckHWBlit = NULL;
device->FillHWRect = NULL;
device->SetHWColorKey = NULL;
device->SetHWAlpha = NULL;
device->LockHWSurface = RISCOS_LockHWSurface;
device->UnlockHWSurface = RISCOS_UnlockHWSurface;
device->FreeHWSurface = RISCOS_FreeHWSurface;
device->FreeWMCursor = RISCOS_FreeWMCursor;
device->CreateWMCursor = RISCOS_CreateWMCursor;
device->CheckMouseMode = RISCOS_CheckMouseMode;
device->GrabInput = RISCOS_GrabInput;
device->InitOSKeymap = RISCOS_InitOSKeymap;
device->GetWMInfo = RISCOS_GetWmInfo;
device->free = RISCOS_DeleteDevice;
/* Can't get Toggle screen to work if program starts up in Full screen mode so
disable it here and re-enable it when a wimp screen is chosen */
device->ToggleFullScreen = NULL; /*RISCOS_ToggleFullScreen;*/
/* Set other entries for fullscreen mode */
FULLSCREEN_SetDeviceMode(device);
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/* Mouse pointer needs to use the WIMP ShowCursor version so
that it doesn't modify the pointer until the SDL Window is
entered or the application goes full screen */
device->ShowWMCursor = WIMP_ShowWMCursor;
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return device;
}
VideoBootStrap RISCOS_bootstrap = {
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RISCOSVID_DRIVER_NAME, "RISC OS video driver",
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RISCOS_Available, RISCOS_CreateDevice
};
int RISCOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
_kernel_swi_regs regs;
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int vars[4], vals[3];
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if (RISCOS_InitTask() == 0)
{
SDL_SetError("Unable to start task");
return 0;
}
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vars[0] = 9; /* Log base 2 bpp */
vars[1] = 11; /* XWndLimit - num x pixels -1 */
vars[2] = 12; /* YWndLimit - num y pixels -1 */
vars[3] = -1; /* Terminate list */
regs.r[0] = (int)vars;
regs.r[1] = (int)vals;
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_kernel_swi(OS_ReadVduVariables, ®s, ®s);
vformat->BitsPerPixel = (1 << vals[0]);
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/* Determine the current screen size */
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this->info.current_w = vals[1] + 1;
this->info.current_h = vals[2] + 1;
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/* Minimum bpp for SDL is 8 */
if (vformat->BitsPerPixel < 8) vformat->BitsPerPixel = 8;
switch (vformat->BitsPerPixel)
{
case 15:
case 16:
vformat->Bmask = 0x00007c00;
vformat->Gmask = 0x000003e0;
vformat->Rmask = 0x0000001f;
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vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */
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vformat->BytesPerPixel = 2;
break;
case 24:
case 32:
vformat->Bmask = 0x00ff0000;
vformat->Gmask = 0x0000ff00;
vformat->Rmask = 0x000000ff;
vformat->BytesPerPixel = 4;
break;
default:
vformat->Bmask = 0;
vformat->Gmask = 0;
vformat->Rmask = 0;
vformat->BytesPerPixel = 1;
break;
}
/* Fill in some window manager capabilities */
this->info.wm_available = 1;
/* We're done! */
return(0);
}
/* Note: If we are terminated, this could be called in the middle of
another SDL video routine -- notably UpdateRects.
*/
void RISCOS_VideoQuit(_THIS)
{
RISCOS_ExitTask();
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if (this->hidden->alloc_bank) SDL_free(this->hidden->alloc_bank);
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this->hidden->alloc_bank = 0;
}
SDL_Rect **RISCOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
if (flags & SDL_FULLSCREEN)
{
/* Build mode list when first required. */
if (SDL_nummodes[0] == 0) FULLSCREEN_BuildModeList(this);
return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
} else
return (SDL_Rect **)-1;
}
/* Set up video mode */
SDL_Surface *RISCOS_SetVideoMode(_THIS, SDL_Surface *current,
int width, int height, int bpp, Uint32 flags)
{
if (flags & SDL_FULLSCREEN)
{
RISCOS_StoreWimpMode();
/* Dump wimp window on switch to full screen */
if (this->hidden->window_handle) WIMP_DeleteWindow(this);
return FULLSCREEN_SetVideoMode(this, current, width, height, bpp, flags);
} else
{
RISCOS_RestoreWimpMode();
return WIMP_SetVideoMode(this, current, width, height, bpp, flags);
}
}
/* We don't actually allow hardware surfaces other than the main one */
static int RISCOS_AllocHWSurface(_THIS, SDL_Surface *surface)
{
return(-1);
}
static void RISCOS_FreeHWSurface(_THIS, SDL_Surface *surface)
{
return;
}
/* We need to wait for vertical retrace on page flipped displays */
static int RISCOS_LockHWSurface(_THIS, SDL_Surface *surface)
{
return(0);
}
static void RISCOS_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
return;
}
int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo *info)
{
SDL_VERSION(&(info->version));
info->wimpVersion = RISCOS_GetWimpVersion();
info->taskHandle = RISCOS_GetTaskHandle();
info->window = this->hidden->window_handle;
return 1;
}
/* Toggle full screen mode.
Returns 1 if successful otherwise 0
*/
int RISCOS_ToggleFullScreen(_THIS, int fullscreen)
{
if (fullscreen)
{
return FULLSCREEN_ToggleFromWimp(this);
} else
{
return WIMP_ToggleFromFullScreen(this);
}
return 0;
}