/
SDL_xbios.c
1116 lines (955 loc) · 26.3 KB
/
SDL_xbios.c
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/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 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
Lesser General Public License for more details.
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
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
/*
* Xbios SDL video driver
*
* Patrice Mandin
*/
#include <sys/stat.h>
#include <unistd.h>
/* Mint includes */
#include <mint/cookie.h>
#include <mint/osbind.h>
#include <mint/falcon.h>
#include "SDL_video.h"
#include "SDL_mouse.h"
#include "../SDL_sysvideo.h"
#include "../SDL_pixels_c.h"
#include "../../events/SDL_events_c.h"
#include "../ataricommon/SDL_ataric2p_s.h"
#include "../ataricommon/SDL_atarievents_c.h"
#include "../ataricommon/SDL_atarimxalloc_c.h"
#include "../ataricommon/SDL_atarigl_c.h"
#include "SDL_xbios.h"
#include "SDL_xbios_blowup.h"
#include "SDL_xbios_centscreen.h"
#include "SDL_xbios_sb3.h"
#include "SDL_xbios_tveille.h"
#include "SDL_xbios_milan.h"
#define XBIOS_VID_DRIVER_NAME "xbios"
#ifndef C_fVDI
#define C_fVDI 0x66564449L
#endif
/* Debug print info */
#if 0
#define DEBUG_PRINT(what) \
{ \
printf what; \
}
#define DEBUG_VIDEO_XBIOS 1
#else
#define DEBUG_PRINT(what)
#undef DEBUG_VIDEO_XBIOS
#endif
/* 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 int XBIOS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
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);
#if SDL_VIDEO_OPENGL
/* OpenGL functions */
static void XBIOS_GL_SwapBuffers(_THIS);
#endif
/* To setup palette */
static unsigned short TT_palette[256];
static unsigned long F30_palette[256];
/* Default list of video modes */
static const xbiosmode_t stmodes[1]={
{ST_LOW>>8,320,200,4, XBIOSMODE_C2P}
};
static const xbiosmode_t ttmodes[2]={
{TT_LOW,320,480,8, XBIOSMODE_C2P},
{TT_LOW,320,240,8, XBIOSMODE_C2P|XBIOSMODE_DOUBLELINE}
};
static const xbiosmode_t falconrgbmodes[16]={
{BPS16|COL80|OVERSCAN|VERTFLAG,768,480,16,0},
{BPS16|COL80|OVERSCAN,768,240,16,0},
{BPS16|COL80|VERTFLAG,640,400,16,0},
{BPS16|COL80,640,200,16,0},
{BPS16|OVERSCAN|VERTFLAG,384,480,16,0},
{BPS16|OVERSCAN,384,240,16,0},
{BPS16|VERTFLAG,320,400,16,0},
{BPS16,320,200,16,0},
{BPS8|COL80|OVERSCAN|VERTFLAG,768,480,8,XBIOSMODE_C2P},
{BPS8|COL80|OVERSCAN,768,240,8,XBIOSMODE_C2P},
{BPS8|COL80|VERTFLAG,640,400,8,XBIOSMODE_C2P},
{BPS8|COL80,640,200,8,XBIOSMODE_C2P},
{BPS8|OVERSCAN|VERTFLAG,384,480,8,XBIOSMODE_C2P},
{BPS8|OVERSCAN,384,240,8,XBIOSMODE_C2P},
{BPS8|VERTFLAG,320,400,8,XBIOSMODE_C2P},
{BPS8,320,200,8,XBIOSMODE_C2P}
};
static const xbiosmode_t falconvgamodes[6]={
{BPS16,320,480,16,0},
{BPS16|VERTFLAG,320,240,16,0},
{BPS8|COL80,640,480,8,XBIOSMODE_C2P},
{BPS8|COL80|VERTFLAG,640,240,8,XBIOSMODE_C2P},
{BPS8,320,480,8,XBIOSMODE_C2P},
{BPS8|VERTFLAG,320,240,8,XBIOSMODE_C2P}
};
/* Xbios driver bootstrap functions */
static int XBIOS_Available(void)
{
long cookie_vdo, /*cookie_mil,*/ cookie_hade, cookie_scpn;
long cookie_fvdi;
const char *envr = SDL_getenv("SDL_VIDEODRIVER");
/* Milan/Hades Atari clones do not have an Atari video chip */
if ( /*(Getcookie(C__MIL, &cookie_mil) == C_FOUND) ||*/
(Getcookie(C_hade, &cookie_hade) == C_FOUND) ) {
return 0;
}
/* 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 */
}
/* 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:
if ( VgetMonitor() == MONITOR_MONO)
return 0;
if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
if (!SDL_XBIOS_SB3Usable((scpn_cookie_t *)cookie_scpn)) {
return 0;
}
}
break;
case VDO_MILAN:
break;
default:
return 0;
}
return 1;
}
static void XBIOS_DeleteDevice(SDL_VideoDevice *device)
{
SDL_free(device->hidden);
SDL_free(device);
}
static SDL_VideoDevice *XBIOS_CreateDevice(int devindex)
{
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));
device->gl_data = (struct SDL_PrivateGLData *)
SDL_malloc((sizeof *device->gl_data));
}
if ( (device == NULL) || (device->hidden == NULL) ) {
SDL_OutOfMemory();
if ( device ) {
SDL_free(device);
}
return(0);
}
SDL_memset(device->hidden, 0, (sizeof *device->hidden));
SDL_memset(device->gl_data, 0, sizeof(*device->gl_data));
/* Video functions */
device->VideoInit = XBIOS_VideoInit;
device->ListModes = XBIOS_ListModes;
device->SetVideoMode = XBIOS_SetVideoMode;
device->SetColors = XBIOS_SetColors;
device->UpdateRects = NULL;
device->VideoQuit = XBIOS_VideoQuit;
device->AllocHWSurface = XBIOS_AllocHWSurface;
device->LockHWSurface = XBIOS_LockHWSurface;
device->UnlockHWSurface = XBIOS_UnlockHWSurface;
device->FlipHWSurface = XBIOS_FlipHWSurface;
device->FreeHWSurface = XBIOS_FreeHWSurface;
#if SDL_VIDEO_OPENGL
/* OpenGL functions */
device->GL_LoadLibrary = SDL_AtariGL_LoadLibrary;
device->GL_GetProcAddress = SDL_AtariGL_GetProcAddress;
device->GL_GetAttribute = SDL_AtariGL_GetAttribute;
device->GL_MakeCurrent = SDL_AtariGL_MakeCurrent;
device->GL_SwapBuffers = XBIOS_GL_SwapBuffers;
#endif
/* Events */
device->InitOSKeymap = Atari_InitOSKeymap;
device->PumpEvents = Atari_PumpEvents;
device->free = XBIOS_DeleteDevice;
return device;
}
VideoBootStrap XBIOS_bootstrap = {
XBIOS_VID_DRIVER_NAME, "Atari Xbios driver",
XBIOS_Available, XBIOS_CreateDevice
};
void SDL_XBIOS_AddMode(_THIS, int actually_add, const xbiosmode_t *modeinfo)
{
int i = 0;
switch(modeinfo->depth) {
case 15:
case 16:
i = 1;
break;
case 24:
i = 2;
break;
case 32:
i = 3;
break;
}
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) ) {
return;
}
/* 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];
memcpy(&saved_mode[!b], SDL_xbiosmode[i][j], sizeof(xbiosmode_t));
*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];
}
}
static void XBIOS_ListSTModes(_THIS, int actually_add)
{
SDL_XBIOS_AddMode(this, actually_add, &stmodes[0]);
}
static void XBIOS_ListTTModes(_THIS, int actually_add)
{
int i;
for (i=0; i<2; i++) {
SDL_XBIOS_AddMode(this, actually_add, &ttmodes[i]);
}
}
static void XBIOS_ListFalconRgbModes(_THIS, int actually_add)
{
int i;
for (i=0; i<16; i++) {
xbiosmode_t modeinfo;
SDL_memcpy(&modeinfo, &falconrgbmodes[i], sizeof(xbiosmode_t));
modeinfo.number &= ~(VGA|PAL);
modeinfo.number |= XBIOS_oldvmode & (VGA|PAL);
SDL_XBIOS_AddMode(this, actually_add, &modeinfo);
}
}
static void XBIOS_ListFalconVgaModes(_THIS, int actually_add)
{
int i;
for (i=0; i<6; i++) {
xbiosmode_t modeinfo;
SDL_memcpy(&modeinfo, &falconvgamodes[i], sizeof(xbiosmode_t));
modeinfo.number &= ~(VGA|PAL);
modeinfo.number |= XBIOS_oldvmode & (VGA|PAL);
SDL_XBIOS_AddMode(this, actually_add, &modeinfo);
}
}
static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
int i;
long cookie_blow, cookie_scpn, cookie_cnts;
/* Initialize all variables that we clean on shutdown */
for ( i=0; i<NUM_MODELISTS; ++i ) {
SDL_nummodes[i] = 0;
SDL_modelist[i] = NULL;
SDL_xbiosmode[i] = NULL;
}
/* Cookie _VDO present ? if not, assume ST machine */
if (Getcookie(C__VDO, &XBIOS_cvdo) != C_FOUND) {
XBIOS_cvdo = VDO_ST << 16;
}
/* Allocate memory for old palette */
XBIOS_oldpalette = (void *)SDL_malloc(256*sizeof(long));
if ( !XBIOS_oldpalette ) {
SDL_SetError("Unable to allocate memory for old palette\n");
return(-1);
}
/* Initialize video mode list */
/* and save current screen status (palette, screen address, video mode) */
XBIOS_centscreen = SDL_FALSE;
XBIOS_oldvbase = Physbase();
/* 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;
/* First allocate room for needed video modes */
switch (XBIOS_cvdo >>16) {
case VDO_ST:
case VDO_STE:
{
short *oldpalette;
XBIOS_oldvmode=Getrez();
switch(XBIOS_oldvmode << 8) {
case ST_LOW:
XBIOS_oldnumcol=16;
break;
case ST_MED:
XBIOS_oldnumcol=4;
break;
case ST_HIGH:
XBIOS_oldnumcol=2;
break;
}
oldpalette= (short *) XBIOS_oldpalette;
for (i=0;i<XBIOS_oldnumcol;i++) {
*oldpalette++=Setcolor(i,-1);
}
XBIOS_ListSTModes(this, 0);
}
break;
case VDO_TT:
XBIOS_oldvmode=EgetShift();
switch(XBIOS_oldvmode & ES_MODE) {
case TT_LOW:
XBIOS_oldnumcol=256;
break;
case ST_LOW:
case TT_MED:
XBIOS_oldnumcol=16;
break;
case ST_MED:
XBIOS_oldnumcol=4;
break;
case ST_HIGH:
case TT_HIGH:
XBIOS_oldnumcol=2;
break;
}
if (XBIOS_oldnumcol) {
EgetPalette(0, XBIOS_oldnumcol, XBIOS_oldpalette);
}
XBIOS_ListTTModes(this, 0);
break;
case VDO_F30:
XBIOS_oldvmode=VsetMode(-1);
XBIOS_oldnumcol= 1<< (1 << (XBIOS_oldvmode & NUMCOLS));
if (XBIOS_oldnumcol > 256) {
XBIOS_oldnumcol = 0;
}
if (XBIOS_oldnumcol) {
VgetRGB(0, XBIOS_oldnumcol, XBIOS_oldpalette);
}
vformat->BitsPerPixel = 16;
/* ScreenBlaster 3 ? */
if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
SDL_XBIOS_ListSB3Modes(this, 0, (scpn_cookie_t *)cookie_scpn);
} else
/* Centscreen ? */
if (Getcookie(C_CNTS, &cookie_cnts) == C_FOUND) {
XBIOS_oldvmode = SDL_XBIOS_ListCentscreenModes(this, 0);
XBIOS_centscreen = SDL_TRUE;
} else
/* Standard, with or without Blowup */
{
switch (VgetMonitor())
{
case MONITOR_RGB:
case MONITOR_TV:
XBIOS_ListFalconRgbModes(this, 0);
break;
case MONITOR_VGA:
XBIOS_ListFalconVgaModes(this, 0);
break;
}
if (Getcookie(C_BLOW, &cookie_blow) == C_FOUND) {
SDL_XBIOS_ListBlowupModes(this, 0, (blow_cookie_t *)cookie_blow);
}
}
break;
case VDO_MILAN:
{
SCREENINFO si;
/* Read infos about current mode */
VsetScreen(-1, &XBIOS_oldvmode, MI_MAGIC, CMD_GETMODE);
si.size = sizeof(SCREENINFO);
si.devID = XBIOS_oldvmode;
si.scrFlags = 0;
VsetScreen(-1, &si, MI_MAGIC, CMD_GETINFO);
this->info.current_w = si.scrWidth;
this->info.current_h = si.scrHeight;
XBIOS_oldnumcol = 0;
if (si.scrFlags & SCRINFO_OK) {
if (si.scrPlanes <= 8) {
XBIOS_oldnumcol = 1<<si.scrPlanes;
}
}
if (XBIOS_oldnumcol) {
VgetRGB(0, XBIOS_oldnumcol, XBIOS_oldpalette);
}
SDL_XBIOS_ListMilanModes(this, 0);
}
break;
}
for ( i=0; i<NUM_MODELISTS; ++i ) {
int j;
SDL_xbiosmode[i] = (xbiosmode_t **)
SDL_malloc((SDL_nummodes[i]+1)*sizeof(xbiosmode_t *));
if ( SDL_xbiosmode[i] == NULL ) {
SDL_OutOfMemory();
return(-1);
}
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));
}
SDL_xbiosmode[i][j] = NULL;
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);
}
SDL_memset(SDL_modelist[i][j], 0, sizeof(SDL_Rect));
}
SDL_modelist[i][j] = NULL;
}
/* Now fill the mode list */
switch (XBIOS_cvdo >>16) {
case VDO_ST:
case VDO_STE:
XBIOS_ListSTModes(this, 1);
break;
case VDO_TT:
XBIOS_ListTTModes(this, 1);
break;
case VDO_F30:
/* ScreenBlaster 3 ? */
if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {
SDL_XBIOS_ListSB3Modes(this, 1, (scpn_cookie_t *)cookie_scpn);
} else
/* Centscreen ? */
if (Getcookie(C_CNTS, &cookie_cnts) == C_FOUND) {
XBIOS_oldvmode = SDL_XBIOS_ListCentscreenModes(this, 1);
XBIOS_centscreen = SDL_TRUE;
} else
/* Standard, with or without Blowup */
{
switch (VgetMonitor())
{
case MONITOR_RGB:
case MONITOR_TV:
XBIOS_ListFalconRgbModes(this, 1);
break;
case MONITOR_VGA:
XBIOS_ListFalconVgaModes(this, 1);
break;
}
if (Getcookie(C_BLOW, &cookie_blow) == C_FOUND) {
SDL_XBIOS_ListBlowupModes(this, 1, (blow_cookie_t *)cookie_blow);
}
}
break;
case VDO_MILAN:
SDL_XBIOS_ListMilanModes(this, 1);
break;
}
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 */
SDL_Atari_C2pConvert = SDL_Atari_C2pConvert8;
#if SDL_VIDEO_OPENGL
SDL_AtariGL_InitPointers(this);
#endif
/* Disable screensavers */
if (SDL_XBIOS_TveillePresent(this)) {
SDL_XBIOS_TveilleDisable(this);
}
/* We're done! */
return(0);
}
static SDL_Rect **XBIOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
return(SDL_modelist[((format->BitsPerPixel+7)/8)-1]);
}
static void XBIOS_FreeBuffers(_THIS)
{
int i;
for (i=0;i<2;i++) {
if (XBIOS_screensmem[i]!=NULL) {
if ((XBIOS_cvdo>>16) == VDO_MILAN) {
if (i==1) {
VsetScreen(-1, -1, MI_MAGIC, CMD_FREEPAGE);
}
} else {
Mfree(XBIOS_screensmem[i]);
}
XBIOS_screensmem[i]=NULL;
}
}
if (XBIOS_shadowscreen!=NULL) {
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;
int i, num_buffers;
xbiosmode_t *new_video_mode;
Uint32 new_screen_size;
Uint32 modeflags;
/* Free current buffers */
XBIOS_FreeBuffers(this);
/* Try to set the requested linear video mode */
bpp = (bpp+7)/8-1;
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);
}
new_video_mode = SDL_xbiosmode[bpp][mode];
modeflags = SDL_FULLSCREEN | SDL_PREALLOC;
/* Allocate needed buffers: simple/double buffer and shadow surface */
new_depth = new_video_mode->depth;
if (new_depth == 4) {
SDL_Atari_C2pConvert = SDL_Atari_C2pConvert4;
new_depth=8;
modeflags |= SDL_SWSURFACE|SDL_HWPALETTE;
} else if (new_depth == 8) {
SDL_Atari_C2pConvert = SDL_Atari_C2pConvert8;
modeflags |= SDL_SWSURFACE|SDL_HWPALETTE;
} else {
modeflags |= SDL_HWSURFACE;
}
new_screen_size = width * height * ((new_depth)>>3);
new_screen_size += 256; /* To align on a 256 byte adress */
if (new_video_mode->flags & XBIOSMODE_C2P) {
XBIOS_shadowscreen = Atari_SysMalloc(new_screen_size, MX_PREFTTRAM);
if (XBIOS_shadowscreen == NULL) {
SDL_SetError("Can not allocate %d KB for shadow buffer", new_screen_size>>10);
return (NULL);
}
SDL_memset(XBIOS_shadowscreen, 0, new_screen_size);
}
/* Output buffer needs to be twice in size for the software double-line mode */
if (new_video_mode->flags & XBIOSMODE_DOUBLELINE) {
new_screen_size <<= 1;
}
/* Double buffer ? */
num_buffers = 1;
#if SDL_VIDEO_OPENGL
if (flags & SDL_OPENGL) {
if (this->gl_config.double_buffer) {
flags |= SDL_DOUBLEBUF;
}
}
#endif
if ((flags & SDL_DOUBLEBUF) && ((XBIOS_cvdo>>16) != VDO_MILAN)) {
num_buffers = 2;
modeflags |= SDL_DOUBLEBUF;
}
/* Allocate buffers */
for (i=0; i<num_buffers; i++) {
if ((XBIOS_cvdo>>16) == VDO_MILAN) {
if (i==0) {
XBIOS_screensmem[i] = XBIOS_oldvbase;
} else {
VsetScreen(-1, &XBIOS_screensmem[i], MI_MAGIC, CMD_ALLOCPAGE);
}
} else {
XBIOS_screensmem[i] = Atari_SysMalloc(new_screen_size, MX_STRAM);
}
if (XBIOS_screensmem[i]==NULL) {
XBIOS_FreeBuffers(this);
SDL_SetError("Can not allocate %d KB for buffer %d", new_screen_size>>10, i);
return (NULL);
}
SDL_memset(XBIOS_screensmem[i], 0, new_screen_size);
XBIOS_screens[i]=(void *) (( (long) XBIOS_screensmem[i]+256) & 0xFFFFFF00UL);
}
/* 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);
}
XBIOS_current = new_video_mode;
current->w = width;
current->h = height;
current->pitch = (width * new_depth)>>3;
/* this is for C2P conversion */
XBIOS_pitch = (new_video_mode->width * new_video_mode->depth)>>3;
if (new_video_mode->flags & XBIOSMODE_C2P)
current->pixels = XBIOS_shadowscreen;
else
current->pixels = XBIOS_screens[0];
XBIOS_fbnum = 0;
#if SDL_VIDEO_OPENGL
if (flags & SDL_OPENGL) {
if (!SDL_AtariGL_Init(this, current)) {
XBIOS_FreeBuffers(this);
SDL_SetError("Can not create OpenGL context");
return NULL;
}
modeflags |= SDL_OPENGL;
}
#endif
current->flags = modeflags;
#ifndef DEBUG_VIDEO_XBIOS
/* Now set the video mode */
if ((XBIOS_cvdo>>16) == VDO_MILAN) {
VsetScreen(-1, XBIOS_screens[0], MI_MAGIC, CMD_SETADR);
} else {
Setscreen(-1,XBIOS_screens[0],-1);
}
switch(XBIOS_cvdo >> 16) {
case VDO_ST:
Setscreen(-1,-1,new_video_mode->number);
/* Reset palette */
for (i=0;i<16;i++) {
TT_palette[i]= ((i>>1)<<8) | (((i*8)/17)<<4) | (i>>1);
}
Setpalette(TT_palette);
break;
case VDO_STE:
Setscreen(-1,-1,new_video_mode->number);
/* Reset palette */
for (i=0;i<16;i++)
{
int c;
c=((i&1)<<3)|((i>>1)&7);
TT_palette[i]=(c<<8)|(c<<4)|c;
}
Setpalette(TT_palette);
break;
case VDO_TT:
EsetShift(new_video_mode->number);
break;
case VDO_F30:
if (XBIOS_centscreen) {
SDL_XBIOS_CentscreenSetmode(this, width, height, new_depth);
} else {
VsetMode(new_video_mode->number);
}
/* Set hardware palette to black in True Colour */
if (new_depth > 8) {
SDL_memset(F30_palette, 0, sizeof(F30_palette));
VsetRGB(0,256,F30_palette);
}
break;
case VDO_MILAN:
VsetScreen(-1, new_video_mode->number, MI_MAGIC, CMD_SETMODE);
/* Set hardware palette to black in True Colour */
if (new_depth > 8) {
SDL_memset(F30_palette, 0, sizeof(F30_palette));
VsetRGB(0,256,F30_palette);
}
break;
}
Vsync();
#endif
this->UpdateRects = XBIOS_UpdateRects;
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;
}
static void XBIOS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
{
SDL_Surface *surface;
surface = this->screen;
if (XBIOS_current->flags & XBIOSMODE_C2P) {
int i;
int doubleline = (XBIOS_current->flags & XBIOSMODE_DOUBLELINE ? 1 : 0);
for (i=0;i<numrects;i++) {
void *source,*destination;
int x1,x2;
x1 = rects[i].x & ~15;
x2 = rects[i].x+rects[i].w;
if (x2 & 15) {
x2 = (x2 | 15) +1;
}
source = surface->pixels;
source += surface->pitch * rects[i].y;
source += x1;
destination = XBIOS_screens[XBIOS_fbnum];
destination += XBIOS_pitch * rects[i].y;
destination += x1;
/* Convert chunky to planar screen */
SDL_Atari_C2pConvert(
source,
destination,
x2-x1,
rects[i].h,
doubleline,
surface->pitch,
XBIOS_pitch
);
}
}
#ifndef DEBUG_VIDEO_XBIOS
if ((XBIOS_cvdo>>16) == VDO_MILAN) {
VsetScreen(-1, XBIOS_screens[XBIOS_fbnum], MI_MAGIC, CMD_SETADR);
} else {
Setscreen(-1,XBIOS_screens[XBIOS_fbnum],-1);
}
Vsync();
#endif
if ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
XBIOS_fbnum ^= 1;
if ((XBIOS_current->flags & XBIOSMODE_C2P) == 0) {
surface->pixels=XBIOS_screens[XBIOS_fbnum];
}
}
}
static int XBIOS_FlipHWSurface(_THIS, SDL_Surface *surface)
{
if (XBIOS_current->flags & XBIOSMODE_C2P) {
void *destscr;
int destx;
int doubleline = (XBIOS_current->flags & XBIOSMODE_DOUBLELINE ? 1 : 0);
/* Center on destination screen */
destscr = XBIOS_screens[XBIOS_fbnum];
destscr += XBIOS_pitch * ((XBIOS_current->height - surface->h) >> 1);
destx = (XBIOS_current->width - surface->w) >> 1;
destx &= ~15;
destscr += destx;
/* Convert chunky to planar screen */
SDL_Atari_C2pConvert(
surface->pixels,
destscr,
surface->w,
surface->h,
doubleline,
surface->pitch,
XBIOS_pitch
);
}
#ifndef DEBUG_VIDEO_XBIOS
if ((XBIOS_cvdo>>16) == VDO_MILAN) {
VsetScreen(-1, XBIOS_screens[XBIOS_fbnum], MI_MAGIC, CMD_SETADR);
} else {
Setscreen(-1,XBIOS_screens[XBIOS_fbnum],-1);
}
Vsync();
#endif
if ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {
XBIOS_fbnum ^= 1;
if ((XBIOS_current->flags & XBIOSMODE_C2P) == 0) {
surface->pixels=XBIOS_screens[XBIOS_fbnum];
}
}
return(0);
}
static int XBIOS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
#ifndef DEBUG_VIDEO_XBIOS
int i;
int r,v,b;
switch( XBIOS_cvdo >> 16) {
case VDO_ST:
case VDO_STE:
for (i=0;i<ncolors;i++)
{
r = colors[i].r;
v = colors[i].g;
b = colors[i].b;
TT_palette[firstcolor+i]=((r*30)+(v*59)+(b*11))/100;
}
SDL_Atari_C2pConvert4_pal(TT_palette); /* convert the lighting */
break;
case VDO_TT:
for(i = 0; i < ncolors; i++)
{
r = colors[i].r;
v = colors[i].g;
b = colors[i].b;