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SDL_riscosvideo.c
337 lines (271 loc) · 9.31 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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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 */
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static int RISCOS_VideoInit(_THIS, SDL_PixelFormat * vformat);
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static void RISCOS_VideoQuit(_THIS);
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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);
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int RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo * info);
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int RISCOS_ToggleFullScreen(_THIS, int fullscreen);
/* Mouse checking */
void RISCOS_CheckMouseMode(_THIS);
extern SDL_GrabMode RISCOS_GrabInput(_THIS, SDL_GrabMode mode);
/* Fullscreen mode functions */
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extern SDL_Surface *FULLSCREEN_SetVideoMode(_THIS, SDL_Surface * current,
int width, int height, int bpp,
Uint32 flags);
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extern void FULLSCREEN_BuildModeList(_THIS);
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extern void FULLSCREEN_SetDeviceMode(_THIS);
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extern int FULLSCREEN_ToggleFromWimp(_THIS);
/* Wimp mode functions */
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extern SDL_Surface *WIMP_SetVideoMode(_THIS, SDL_Surface * current,
int width, int height, int bpp,
Uint32 flags);
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extern void WIMP_DeleteWindow(_THIS);
extern int WIMP_ToggleFromFullScreen(_THIS);
/* Hardware surface functions - common to WIMP and FULLSCREEN */
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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)
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{
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return (1);
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}
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static void
RISCOS_DeleteDevice(SDL_VideoDevice * device)
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{
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SDL_free(device->hidden);
SDL_free(device);
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}
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static SDL_VideoDevice *
RISCOS_CreateDevice(int devindex)
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{
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SDL_VideoDevice *device;
/* Initialize all variables that we clean on shutdown */
device = (SDL_VideoDevice *) SDL_malloc(sizeof(SDL_VideoDevice));
if (device) {
SDL_memset(device, 0, (sizeof *device));
device->hidden = (struct SDL_PrivateVideoData *)
SDL_malloc((sizeof *device->hidden));
}
if ((device == NULL) || (device->hidden == NULL)) {
SDL_OutOfMemory();
if (device) {
SDL_free(device);
}
return (0);
}
SDL_memset(device->hidden, 0, (sizeof *device->hidden));
/* 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;
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device->GrabInput = RISCOS_GrabInput;
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device->InitOSKeymap = RISCOS_InitOSKeymap;
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device->GetWMInfo = RISCOS_GetWmInfo;
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device->free = RISCOS_DeleteDevice;
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/* 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 */
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device->ToggleFullScreen = NULL; /*RISCOS_ToggleFullScreen; */
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/* 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;
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}
VideoBootStrap RISCOS_bootstrap = {
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RISCOSVID_DRIVER_NAME, "RISC OS video driver",
RISCOS_Available, RISCOS_CreateDevice
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};
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int
RISCOS_VideoInit(_THIS, SDL_PixelFormat * vformat)
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{
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_kernel_swi_regs regs;
int vars[4], vals[3];
if (RISCOS_InitTask() == 0) {
SDL_SetError("Unable to start task");
return 0;
}
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;
_kernel_swi(OS_ReadVduVariables, ®s, ®s);
vformat->BitsPerPixel = (1 << vals[0]);
/* Determine the current screen size */
this->info.current_w = vals[1] + 1;
this->info.current_h = vals[2] + 1;
/* 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;
vformat->BitsPerPixel = 16; /* SDL wants actual number of bits used */
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);
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}
/* Note: If we are terminated, this could be called in the middle of
another SDL video routine -- notably UpdateRects.
*/
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void
RISCOS_VideoQuit(_THIS)
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{
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RISCOS_ExitTask();
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if (this->hidden->alloc_bank)
SDL_free(this->hidden->alloc_bank);
this->hidden->alloc_bank = 0;
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}
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SDL_Rect **
RISCOS_ListModes(_THIS, SDL_PixelFormat * format, Uint32 flags)
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{
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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;
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}
/* Set up video mode */
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SDL_Surface *
RISCOS_SetVideoMode(_THIS, SDL_Surface * current,
int width, int height, int bpp, Uint32 flags)
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{
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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);
}
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}
/* We don't actually allow hardware surfaces other than the main one */
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static int
RISCOS_AllocHWSurface(_THIS, SDL_Surface * surface)
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{
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return (-1);
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}
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static void
RISCOS_FreeHWSurface(_THIS, SDL_Surface * surface)
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{
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return;
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}
/* We need to wait for vertical retrace on page flipped displays */
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static int
RISCOS_LockHWSurface(_THIS, SDL_Surface * surface)
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{
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return (0);
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}
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static void
RISCOS_UnlockHWSurface(_THIS, SDL_Surface * surface)
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{
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return;
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}
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int
RISCOS_GetWmInfo(_THIS, SDL_SysWMinfo * info)
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{
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SDL_VERSION(&(info->version));
info->wimpVersion = RISCOS_GetWimpVersion();
info->taskHandle = RISCOS_GetTaskHandle();
info->window = this->hidden->window_handle;
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return 1;
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}
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/* Toggle full screen mode.
Returns 1 if successful otherwise 0
*/
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int
RISCOS_ToggleFullScreen(_THIS, int fullscreen)
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{
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if (fullscreen) {
return FULLSCREEN_ToggleFromWimp(this);
} else {
return WIMP_ToggleFromFullScreen(this);
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}
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return 0;
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}
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/* vi: set ts=4 sw=4 expandtab: */