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SDL_xbios.c
733 lines (611 loc) · 17.4 KB
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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
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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/*
* Xbios SDL video driver
*
* Patrice Mandin
*/
#include <sys/stat.h>
#include <unistd.h>
/* Mint includes */
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#include <mint/cookie.h>
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#include <mint/osbind.h>
#include <mint/falcon.h>
#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 "../ataricommon/SDL_ataric2p_s.h"
#include "../ataricommon/SDL_atarievents_c.h"
#include "../ataricommon/SDL_atarimxalloc_c.h"
#include "../ataricommon/SDL_atarigl_c.h"
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#include "SDL_xbios.h"
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#include "SDL_xbios_sb3.h"
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#include "SDL_xbios_tveille.h"
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#include "SDL_xbios_milan.h"
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#define XBIOS_VID_DRIVER_NAME "xbios"
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#ifndef C_fVDI
#define C_fVDI 0x66564449L
#endif
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/* Debug print info */
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#if 0
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#define DEBUG_PRINT(what) \
{ \
printf what; \
}
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#define DEBUG_VIDEO_XBIOS 1
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#else
#define DEBUG_PRINT(what)
#undef DEBUG_VIDEO_XBIOS
#endif
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/* Initialization/Query functions */
static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Rect **XBIOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
static SDL_Surface *XBIOS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static void XBIOS_VideoQuit(_THIS);
/* Hardware surface functions */
static int XBIOS_AllocHWSurface(_THIS, SDL_Surface *surface);
static int XBIOS_LockHWSurface(_THIS, SDL_Surface *surface);
static int XBIOS_FlipHWSurface(_THIS, SDL_Surface *surface);
static void XBIOS_UnlockHWSurface(_THIS, SDL_Surface *surface);
static void XBIOS_FreeHWSurface(_THIS, SDL_Surface *surface);
static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
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#if SDL_VIDEO_OPENGL
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/* OpenGL functions */
static void XBIOS_GL_SwapBuffers(_THIS);
#endif
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/* Xbios driver bootstrap functions */
static int XBIOS_Available(void)
{
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long cookie_vdo, /*cookie_mil,*/ cookie_hade, cookie_scpn;
long cookie_fvdi;
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const char *envr = SDL_getenv("SDL_VIDEODRIVER");
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/* Milan/Hades Atari clones do not have an Atari video chip */
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if ( /*(Getcookie(C__MIL, &cookie_mil) == C_FOUND) ||*/
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(Getcookie(C_hade, &cookie_hade) == C_FOUND) ) {
return 0;
}
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/* fVDI means graphic card, so no Xbios with it */
if (Getcookie(C_fVDI, &cookie_fvdi) == C_FOUND) {
if (!envr) {
return 0;
}
if (SDL_strcmp(envr, XBIOS_VID_DRIVER_NAME)!=0) {
return 0;
}
/* Except if we force Xbios usage, through env var */
}
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/* Cookie _VDO present ? if not, assume ST machine */
if (Getcookie(C__VDO, &cookie_vdo) != C_FOUND) {
cookie_vdo = VDO_ST << 16;
}
/* Test if we have a monochrome monitor plugged in */
switch( cookie_vdo >>16) {
case VDO_ST:
case VDO_STE:
if ( Getrez() == (ST_HIGH>>8) )
return 0;
break;
case VDO_TT:
if ( (EgetShift() & ES_MODE) == TT_HIGH)
return 0;
break;
case VDO_F30:
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if ( VgetMonitor() == MONITOR_MONO)
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return 0;
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if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
if (!SDL_XBIOS_SB3Usable((scpn_cookie_t *)cookie_scpn)) {
return 0;
}
}
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break;
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case VDO_MILAN:
break;
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default:
return 0;
}
return 1;
}
static void XBIOS_DeleteDevice(SDL_VideoDevice *device)
{
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SDL_free(device->hidden);
SDL_free(device);
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}
static SDL_VideoDevice *XBIOS_CreateDevice(int devindex)
{
SDL_VideoDevice *device;
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long cookie_cvdo;
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/* 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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device->gl_data = (struct SDL_PrivateGLData *)
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SDL_malloc((sizeof *device->gl_data));
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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));
SDL_memset(device->gl_data, 0, sizeof(*device->gl_data));
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/* Video functions */
device->VideoInit = XBIOS_VideoInit;
device->ListModes = XBIOS_ListModes;
device->SetVideoMode = XBIOS_SetVideoMode;
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device->SetColors = NULL; /* Defined by each device specific backend */
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device->UpdateRects = NULL; /* Defined once video mode set */
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device->VideoQuit = XBIOS_VideoQuit;
device->AllocHWSurface = XBIOS_AllocHWSurface;
device->LockHWSurface = XBIOS_LockHWSurface;
device->UnlockHWSurface = XBIOS_UnlockHWSurface;
device->FlipHWSurface = XBIOS_FlipHWSurface;
device->FreeHWSurface = XBIOS_FreeHWSurface;
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#if SDL_VIDEO_OPENGL
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/* OpenGL functions */
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device->GL_LoadLibrary = SDL_AtariGL_LoadLibrary;
device->GL_GetProcAddress = SDL_AtariGL_GetProcAddress;
device->GL_GetAttribute = SDL_AtariGL_GetAttribute;
device->GL_MakeCurrent = SDL_AtariGL_MakeCurrent;
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device->GL_SwapBuffers = XBIOS_GL_SwapBuffers;
#endif
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/* Events */
device->InitOSKeymap = Atari_InitOSKeymap;
device->PumpEvents = Atari_PumpEvents;
device->free = XBIOS_DeleteDevice;
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/* Setup device specific functions, default to ST for everything */
if (Getcookie(C__VDO, &cookie_cvdo) != C_FOUND) {
cookie_cvdo = VDO_ST << 16;
}
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SDL_XBIOS_VideoInit_ST(device, cookie_cvdo);
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device->hidden->updRects = XBIOS_UpdateRects;
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switch (cookie_cvdo>>16) {
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case VDO_ST:
case VDO_STE:
/* Already done as default */
break;
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case VDO_TT:
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SDL_XBIOS_VideoInit_TT(device);
break;
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case VDO_F30:
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SDL_XBIOS_VideoInit_F30(device);
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break;
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case VDO_MILAN:
SDL_XBIOS_VideoInit_Milan(device);
break;
}
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return device;
}
VideoBootStrap XBIOS_bootstrap = {
XBIOS_VID_DRIVER_NAME, "Atari Xbios driver",
XBIOS_Available, XBIOS_CreateDevice
};
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void SDL_XBIOS_AddMode(_THIS, int actually_add, const xbiosmode_t *modeinfo)
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{
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int i = 0;
switch(modeinfo->depth) {
case 15:
case 16:
i = 1;
break;
case 24:
i = 2;
break;
case 32:
i = 3;
break;
}
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if ( actually_add ) {
SDL_Rect saved_rect[2];
xbiosmode_t saved_mode[2];
int b, j;
/* Add the mode, sorted largest to smallest */
b = 0;
j = 0;
while ( (SDL_modelist[i][j]->w > modeinfo->width) ||
(SDL_modelist[i][j]->h > modeinfo->height) ) {
++j;
}
/* Skip modes that are already in our list */
if ( (SDL_modelist[i][j]->w == modeinfo->width) &&
(SDL_modelist[i][j]->h == modeinfo->height) ) {
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return;
}
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/* Insert the new mode */
saved_rect[b] = *SDL_modelist[i][j];
SDL_memcpy(&saved_mode[b], SDL_xbiosmode[i][j], sizeof(xbiosmode_t));
SDL_modelist[i][j]->w = modeinfo->width;
SDL_modelist[i][j]->h = modeinfo->height;
SDL_memcpy(SDL_xbiosmode[i][j], modeinfo, sizeof(xbiosmode_t));
/* Everybody scoot down! */
if ( saved_rect[b].w && saved_rect[b].h ) {
for ( ++j; SDL_modelist[i][j]->w; ++j ) {
saved_rect[!b] = *SDL_modelist[i][j];
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SDL_memcpy(&saved_mode[!b], SDL_xbiosmode[i][j], sizeof(xbiosmode_t));
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*SDL_modelist[i][j] = saved_rect[b];
SDL_memcpy(SDL_xbiosmode[i][j], &saved_mode[b], sizeof(xbiosmode_t));
b = !b;
}
*SDL_modelist[i][j] = saved_rect[b];
SDL_memcpy(SDL_xbiosmode[i][j], &saved_mode[b], sizeof(xbiosmode_t));
}
} else {
++SDL_nummodes[i];
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}
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}
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static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
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int i;
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/* Initialize all variables that we clean on shutdown */
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for ( i=0; i<NUM_MODELISTS; ++i ) {
SDL_nummodes[i] = 0;
SDL_modelist[i] = NULL;
SDL_xbiosmode[i] = NULL;
}
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/* Allocate memory for old palette */
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XBIOS_oldpalette = (void *)SDL_malloc(256*sizeof(long));
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if ( !XBIOS_oldpalette ) {
SDL_SetError("Unable to allocate memory for old palette\n");
return(-1);
}
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/* Determine the current screen size */
this->info.current_w = 0;
this->info.current_h = 0;
/* Determine the screen depth (use default 8-bit depth) */
vformat->BitsPerPixel = 8;
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/* Save current mode, may update current screen size or preferred depth */
(*XBIOS_saveMode)(this, vformat);
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/* First allocate room for needed video modes */
(*XBIOS_listModes)(this, 0);
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for ( i=0; i<NUM_MODELISTS; ++i ) {
int j;
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SDL_xbiosmode[i] = (xbiosmode_t **)
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SDL_malloc((SDL_nummodes[i]+1)*sizeof(xbiosmode_t *));
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if ( SDL_xbiosmode[i] == NULL ) {
SDL_OutOfMemory();
return(-1);
}
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for ( j=0; j<SDL_nummodes[i]; ++j ) {
SDL_xbiosmode[i][j]=(xbiosmode_t *)SDL_malloc(sizeof(xbiosmode_t));
if ( SDL_xbiosmode[i][j] == NULL ) {
SDL_OutOfMemory();
return(-1);
}
SDL_memset(SDL_xbiosmode[i][j], 0, sizeof(xbiosmode_t));
}
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SDL_xbiosmode[i][j] = NULL;
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SDL_modelist[i] = (SDL_Rect **)
SDL_malloc((SDL_nummodes[i]+1)*sizeof(SDL_Rect *));
if ( SDL_modelist[i] == NULL ) {
SDL_OutOfMemory();
return(-1);
}
for ( j=0; j<SDL_nummodes[i]; ++j ) {
SDL_modelist[i][j]=(SDL_Rect *)SDL_malloc(sizeof(SDL_Rect));
if ( SDL_modelist[i][j] == NULL ) {
SDL_OutOfMemory();
return(-1);
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}
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SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect));
}
SDL_modelist[i][j] = NULL;
}
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/* Now fill the mode list */
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(*XBIOS_listModes)(this, 1);
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XBIOS_screens[0]=NULL;
XBIOS_screens[1]=NULL;
XBIOS_shadowscreen=NULL;
/* Update hardware info */
this->info.hw_available = 1;
this->info.video_mem = (Uint32) Atari_SysMalloc(-1L, MX_STRAM);
/* Init chunky to planar routine */
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SDL_Atari_C2pConvert = SDL_Atari_C2pConvert8;
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#if SDL_VIDEO_OPENGL
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SDL_AtariGL_InitPointers(this);
#endif
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/* Disable screensavers */
if (SDL_XBIOS_TveillePresent(this)) {
SDL_XBIOS_TveilleDisable(this);
}
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/* We're done! */
return(0);
}
static SDL_Rect **XBIOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
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return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
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}
static void XBIOS_FreeBuffers(_THIS)
{
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(*XBIOS_freeVbuffers)(this);
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if (XBIOS_shadowscreen) {
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Mfree(XBIOS_shadowscreen);
XBIOS_shadowscreen=NULL;
}
}
static SDL_Surface *XBIOS_SetVideoMode(_THIS, SDL_Surface *current,
int width, int height, int bpp, Uint32 flags)
{
int mode, new_depth;
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int num_buffers;
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xbiosmode_t *new_video_mode;
Uint32 new_screen_size;
Uint32 modeflags;
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Uint32 lineWidth;
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/* Free current buffers */
XBIOS_FreeBuffers(this);
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/* Try to set the requested linear video mode */
bpp = (bpp+7)/8-1;
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for ( mode=0; SDL_modelist[bpp][mode]; ++mode ) {
if ( (SDL_modelist[bpp][mode]->w == width) &&
(SDL_modelist[bpp][mode]->h == height) ) {
break;
}
}
if ( SDL_modelist[bpp][mode] == NULL ) {
SDL_SetError("Couldn't find requested mode in list");
return(NULL);
}
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new_video_mode = SDL_xbiosmode[bpp][mode];
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modeflags = SDL_FULLSCREEN | SDL_PREALLOC;
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/* Allocate needed buffers: simple/double buffer and shadow surface */
new_depth = new_video_mode->depth;
if (new_depth == 4) {
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SDL_Atari_C2pConvert = SDL_Atari_C2pConvert4;
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new_depth=8;
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modeflags |= SDL_SWSURFACE|SDL_HWPALETTE;
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} else if (new_depth == 8) {
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SDL_Atari_C2pConvert = SDL_Atari_C2pConvert8;
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modeflags |= SDL_SWSURFACE|SDL_HWPALETTE;
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} else {
modeflags |= SDL_HWSURFACE;
}
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lineWidth = (*XBIOS_getLineWidth)(this, new_video_mode, width, new_depth);
new_screen_size = lineWidth * height;
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new_screen_size += 256; /* To align on a 256 byte adress */
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if (new_video_mode->flags & XBIOSMODE_C2P) {
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XBIOS_shadowscreen = Atari_SysMalloc(new_screen_size, MX_PREFTTRAM);
if (XBIOS_shadowscreen == NULL) {
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SDL_SetError("Can not allocate %d KB for shadow buffer", new_screen_size>>10);
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return (NULL);
}
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SDL_memset(XBIOS_shadowscreen, 0, new_screen_size);
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}
/* Output buffer needs to be twice in size for the software double-line mode */
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if (new_video_mode->flags & XBIOSMODE_DOUBLELINE) {
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new_screen_size <<= 1;
}
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/* Double buffer ? */
num_buffers = 1;
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#if SDL_VIDEO_OPENGL
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if (flags & SDL_OPENGL) {
if (this->gl_config.double_buffer) {
flags |= SDL_DOUBLEBUF;
}
}
#endif
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if (flags & SDL_DOUBLEBUF) {
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num_buffers = 2;
modeflags |= SDL_DOUBLEBUF;
}
/* Allocate buffers */
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if (!(*XBIOS_allocVbuffers)(this, num_buffers, new_screen_size)) {
XBIOS_FreeBuffers(this);
return (NULL);
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}
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/* Allocate the new pixel format for the screen */
if ( ! SDL_ReallocFormat(current, new_depth, 0, 0, 0, 0) ) {
XBIOS_FreeBuffers(this);
SDL_SetError("Couldn't allocate new pixel format for requested mode");
return(NULL);
}
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XBIOS_current = new_video_mode;
current->w = width;
current->h = height;
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current->pitch = lineWidth;
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/* this is for C2P conversion */
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XBIOS_pitch = (*XBIOS_getLineWidth)(this, new_video_mode, new_video_mode->width, new_video_mode->depth);
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if (XBIOS_shadowscreen)
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current->pixels = XBIOS_shadowscreen;
else
current->pixels = XBIOS_screens[0];
XBIOS_fbnum = 0;
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#if SDL_VIDEO_OPENGL
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if (flags & SDL_OPENGL) {
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if (!SDL_AtariGL_Init(this, current)) {
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XBIOS_FreeBuffers(this);
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SDL_SetError("Can not create OpenGL context");
return NULL;
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}
modeflags |= SDL_OPENGL;
}
#endif
current->flags = modeflags;
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#ifndef DEBUG_VIDEO_XBIOS
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/* Now set the video mode */
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(*XBIOS_setMode)(this, new_video_mode);
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Vsync();
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#endif
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this->UpdateRects = XBIOS_updRects;
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XBIOS_recoffset = 2;
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return (current);
}
/* We don't actually allow hardware surfaces other than the main one */
static int XBIOS_AllocHWSurface(_THIS, SDL_Surface *surface)
{
return(-1);
}
static void XBIOS_FreeHWSurface(_THIS, SDL_Surface *surface)
{
return;
}
static int XBIOS_LockHWSurface(_THIS, SDL_Surface *surface)
{
return(0);
}
static void XBIOS_UnlockHWSurface(_THIS, SDL_Surface *surface)
{
return;
}
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static void recalc_offset(_THIS)
{
int offset_x;
offset_x = (XBIOS_current->width - this->screen->w)>>1;
offset_x &= ~15;
this->offset_x = offset_x;
this->screen->offset = this->offset_y*this->screen->pitch +
this->offset_x*this->screen->format->BytesPerPixel;
--XBIOS_recoffset;
}
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static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
{
SDL_Surface *surface;
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surface = this->screen;
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if (XBIOS_current->flags & XBIOSMODE_C2P) {
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int i;
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int doubleline = (XBIOS_current->flags & XBIOSMODE_DOUBLELINE ? 1 : 0);
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if (XBIOS_recoffset>0) {
recalc_offset(this);
}
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for (i=0;i<numrects;i++) {
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Uint8 *source,*destination;
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int x1,x2;
x1 = rects[i].x & ~15;
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x2 = rects[i].x+rects[i].w;
if (x2 & 15) {
x2 = (x2 | 15) +1;
}
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source = surface->pixels;
source += surface->pitch * rects[i].y;
source += x1;
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destination = XBIOS_screens[XBIOS_fbnum];
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destination += XBIOS_pitch * rects[i].y;
destination += x1;
/* Convert chunky to planar screen */
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SDL_Atari_C2pConvert(
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source,
destination,
x2-x1,
rects[i].h,
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doubleline,
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surface->pitch,
XBIOS_pitch
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);
}
}
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#ifndef DEBUG_VIDEO_XBIOS
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(*XBIOS_swapVbuffers)(this);
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Vsync();
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#endif
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if ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
XBIOS_fbnum ^= 1;
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}
if (XBIOS_shadowscreen) {
surface->pixels=((Uint8 *) XBIOS_shadowscreen) + surface->offset;
} else {
surface->pixels=((Uint8 *) XBIOS_screens[XBIOS_fbnum]) + surface->offset;
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}
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}
static int XBIOS_FlipHWSurface(_THIS, SDL_Surface *surface)
{
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if (XBIOS_current->flags & XBIOSMODE_C2P) {
int doubleline = (XBIOS_current->flags & XBIOSMODE_DOUBLELINE ? 1 : 0);
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if (XBIOS_recoffset>0) {
recalc_offset(this);
}
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/* Convert chunky to planar screen */
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SDL_Atari_C2pConvert(
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surface->pixels,
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((Uint8 *) XBIOS_screens[XBIOS_fbnum]) + surface->offset,
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surface->w,
surface->h,
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doubleline,
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surface->pitch,
XBIOS_pitch
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);
}
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#ifndef DEBUG_VIDEO_XBIOS
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(*XBIOS_swapVbuffers)(this);
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Vsync();
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#endif
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if ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
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XBIOS_fbnum ^= 1;
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}
if (XBIOS_shadowscreen) {
surface->pixels=((Uint8 *) XBIOS_shadowscreen) + surface->offset;
} else {
surface->pixels=((Uint8 *) XBIOS_screens[XBIOS_fbnum]) + surface->offset;
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}
return(0);
}
/* Note: If we are terminated, this could be called in the middle of
another SDL video routine -- notably UpdateRects.
*/
static void XBIOS_VideoQuit(_THIS)
{
int i,j;
Atari_ShutdownEvents();
/* Restore video mode and palette */
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#ifndef DEBUG_VIDEO_XBIOS
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(*XBIOS_restoreMode)(this);
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Vsync();
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#endif
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#if SDL_VIDEO_OPENGL
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if (gl_active) {
SDL_AtariGL_Quit(this, SDL_TRUE);
}
#endif
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if (XBIOS_oldpalette) {
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SDL_free(XBIOS_oldpalette);
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XBIOS_oldpalette=NULL;
}
XBIOS_FreeBuffers(this);
/* Free mode list */
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for ( i=0; i<NUM_MODELISTS; ++i ) {
if ( SDL_modelist[i] != NULL ) {
for ( j=0; SDL_modelist[i][j]; ++j )
SDL_free(SDL_modelist[i][j]);
SDL_free(SDL_modelist[i]);
SDL_modelist[i] = NULL;
}
if ( SDL_xbiosmode[i] != NULL ) {
for ( j=0; SDL_xbiosmode[i][j]; ++j )
SDL_free(SDL_xbiosmode[i][j]);
SDL_free(SDL_xbiosmode[i]);
SDL_xbiosmode[i] = NULL;
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}
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}
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this->screen->pixels = NULL;
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/* Restore screensavers */
if (SDL_XBIOS_TveillePresent(this)) {
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SDL_XBIOS_TveilleEnable(this);
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}
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}
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#if SDL_VIDEO_OPENGL
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static void XBIOS_GL_SwapBuffers(_THIS)
{
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SDL_AtariGL_SwapBuffers(this);
XBIOS_FlipHWSurface(this, this->screen);
SDL_AtariGL_MakeCurrent(this);
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}
#endif