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SDL_ph_modes.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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*/
#ifdef SAVE_RCSID
static char rcsid =
"@(#) $Id$";
#endif
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#include "SDL_error.h"
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#include "SDL_ph_modes_c.h"
static unsigned long key1, key2;
static PgVideoModeInfo_t mode_info;
static PgVideoModes_t mode_list;
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/* The current list of available video modes */
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SDL_Rect SDL_modelist[PH_MAX_VIDEOMODES];
SDL_Rect* SDL_modearray[PH_MAX_VIDEOMODES];
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static int compare_modes_by_res(const void* mode1, const void* mode2)
{
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if (PgGetVideoModeInfo(*(unsigned short*)mode1, &mode_info) < 0)
{
return 0;
}
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key1 = mode_info.width * mode_info.height;
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if (PgGetVideoModeInfo(*(unsigned short*)mode2, &mode_info) < 0)
{
return 0;
}
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key2 = mode_info.width * mode_info.height;
if (key1 > key2)
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{
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return 1;
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}
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else
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{
if (key1 == key2)
{
return 0;
}
else
{
return -1;
}
}
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}
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SDL_Rect **ph_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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{
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int i = 0;
int j = 0;
SDL_Rect Amodelist[PH_MAX_VIDEOMODES];
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for (i=0; i<PH_MAX_VIDEOMODES; i++)
{
SDL_modearray[i]=&SDL_modelist[i];
}
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if (PgGetVideoModeList(&mode_list) < 0)
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{
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SDL_SetError("ph_ListModes(): PgGetVideoModeList() function failed !\n");
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return NULL;
}
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mode_info.bits_per_pixel = 0;
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for (i=0; i < mode_list.num_modes; i++)
{
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0)
{
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SDL_SetError("ph_ListModes(): PgGetVideoModeInfo() function failed on mode: 0x%X.\n", mode_list.modes[i]);
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return NULL;
}
if(mode_info.bits_per_pixel == format->BitsPerPixel)
{
Amodelist[j].w = mode_info.width;
Amodelist[j].h = mode_info.height;
Amodelist[j].x = 0;
Amodelist[j].y = 0;
j++;
}
}
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/* reorder biggest for smallest, assume width dominates */
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for(i=0; i<j; i++)
{
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SDL_modelist[i].w = Amodelist[j - i - 1].w;
SDL_modelist[i].h = Amodelist[j - i - 1].h;
SDL_modelist[i].x = Amodelist[j - i - 1].x;
SDL_modelist[i].y = Amodelist[j - i - 1].y;
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}
SDL_modearray[j]=NULL;
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return SDL_modearray;
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}
void ph_FreeVideoModes(_THIS)
{
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return;
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}
/* return the mode associated with width, height and bpp */
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/* if there is no mode then zero is returned */
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int ph_GetVideoMode(int width, int height, int bpp)
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{
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int i;
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int modestage=0;
int closestmode=0;
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if (PgGetVideoModeList(&mode_list) < 0)
{
return -1;
}
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/* special case for the double-sized 320x200 mode */
if ((width==640) && (height==400))
{
modestage=1;
}
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/* search list for exact match */
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for (i=0; i<mode_list.num_modes; i++)
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{
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0)
{
return 0;
}
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if ((mode_info.width == width) && (mode_info.height == height) &&
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(mode_info.bits_per_pixel == bpp))
{
return mode_list.modes[i];
}
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else
{
if ((modestage) && (mode_info.width == width) && (mode_info.height == height+80) &&
(mode_info.bits_per_pixel == bpp))
{
modestage=2;
closestmode=mode_list.modes[i];
}
}
}
/* if we are here, then no 640x400xbpp mode found and we'll emulate it via 640x480xbpp mode */
if (modestage==2)
{
return closestmode;
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}
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return (i == mode_list.num_modes) ? 0 : mode_list.modes[i];
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}
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/* return the mode associated with width, height and bpp */
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/* if requested bpp is not found the mode with closest bpp is returned */
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int get_mode_any_format(int width, int height, int bpp)
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{
int i, closest, delta, min_delta;
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if (PgGetVideoModeList(&mode_list) < 0)
{
return -1;
}
qsort(mode_list.modes, mode_list.num_modes, sizeof(unsigned short), compare_modes_by_res);
for(i=0;i<mode_list.num_modes;i++)
{
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0)
{
return 0;
}
if ((mode_info.width == width) && (mode_info.height == height))
{
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break;
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}
}
if (i<mode_list.num_modes)
{
/* get closest bpp */
closest = i++;
if (mode_info.bits_per_pixel == bpp)
{
return mode_list.modes[closest];
}
min_delta = abs(mode_info.bits_per_pixel - bpp);
while(1)
{
if (PgGetVideoModeInfo(mode_list.modes[i], &mode_info) < 0)
{
return 0;
}
if ((mode_info.width != width) || (mode_info.height != height))
{
break;
}
else
{
if (mode_info.bits_per_pixel == bpp)
{
closest = i;
break;
}
else
{
delta = abs(mode_info.bits_per_pixel - bpp);
if (delta < min_delta)
{
closest = i;
min_delta = delta;
}
i++;
}
}
}
return mode_list.modes[closest];
}
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return 0;
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}
int ph_ToggleFullScreen(_THIS, int on)
{
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return -1;
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}
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int ph_EnterFullScreen(_THIS, SDL_Surface* screen)
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{
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PgDisplaySettings_t settings;
int mode;
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char* refreshrate;
int refreshratenum;
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if (!currently_fullscreen)
{
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/* Get the video mode and set it */
if (screen->flags & SDL_ANYFORMAT)
{
if ((mode = get_mode_any_format(screen->w, screen->h, screen->format->BitsPerPixel)) == 0)
{
SDL_SetError("ph_EnterFullScreen(): can't find appropriate video mode !\n");
return 0;
}
}
else
{
if ((mode = ph_GetVideoMode(screen->w, screen->h, screen->format->BitsPerPixel)) == 0)
{
SDL_SetError("ph_EnterFullScreen(): can't find appropriate video mode !\n");
return 0;
}
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if (PgGetVideoModeInfo(mode, &mode_info) < 0)
{
SDL_SetError("ph_EnterFullScreen(): can't get video mode capabilities !\n");
return 0;
}
if (mode_info.height != screen->h)
{
if ((mode_info.height==480) && (screen->h==400))
{
videomode_emulatemode=1;
}
}
else
{
videomode_emulatemode=0;
}
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}
/* save old video mode caps */
PgGetVideoMode(&settings);
old_video_mode=settings.mode;
old_refresh_rate=settings.refresh;
/* setup new video mode */
settings.mode = mode;
settings.refresh = 0;
settings.flags = 0;
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refreshrate=getenv("SDL_PHOTON_FULLSCREEN_REFRESH");
if (refreshrate!=NULL)
{
if (sscanf(refreshrate, "%d", &refreshratenum)==1)
{
settings.refresh = refreshratenum;
}
}
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if (PgSetVideoMode(&settings) < 0)
{
SDL_SetError("ph_EnterFullScreen(): PgSetVideoMode() call failed !\n");
return 0;
}
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if (this->screen)
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{
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if ((this->screen->flags & SDL_OPENGL)==SDL_OPENGL)
{
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#ifdef HAVE_OPENGL
#endif /* HAVE_OPENGL */
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return 0;
}
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}
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if (OCImage.direct_context==NULL)
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{
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OCImage.direct_context=(PdDirectContext_t*)PdCreateDirectContext();
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if (!OCImage.direct_context)
{
SDL_SetError("ph_EnterFullScreen(): Can't create direct context !\n");
ph_LeaveFullScreen(this);
return 0;
}
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}
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OCImage.oldDC=PdDirectStart(OCImage.direct_context);
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currently_fullscreen = 1;
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}
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PgFlush();
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return 1;
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}
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int ph_LeaveFullScreen(_THIS)
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{
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PgDisplaySettings_t oldmode_settings;
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if (currently_fullscreen)
{
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if ((this->screen) && ((this->screen->flags & SDL_OPENGL)==SDL_OPENGL))
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{
#ifdef HAVE_OPENGL
#endif /* HAVE_OPENGL */
return 0;
}
else
{
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if (OCImage.direct_context)
{
PdDirectStop(OCImage.direct_context);
PdReleaseDirectContext(OCImage.direct_context);
OCImage.direct_context=NULL;
}
if (OCImage.oldDC)
{
PhDCSetCurrent(OCImage.oldDC);
OCImage.oldDC=NULL;
}
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currently_fullscreen=0;
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/* Restore old video mode */
if (old_video_mode != -1)
{
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oldmode_settings.mode = (unsigned short) old_video_mode;
oldmode_settings.refresh = (unsigned short) old_refresh_rate;
oldmode_settings.flags = 0;
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if (PgSetVideoMode(&oldmode_settings) < 0)
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{
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SDL_SetError("Ph_LeaveFullScreen(): PgSetVideoMode() function failed !\n");
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return 0;
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}
}
old_video_mode=-1;
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old_refresh_rate=-1;
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}
}
return 1;
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}