/*

SDL - Simple DirectMedia Layer

This library is free software; you can redistribute it and/or

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

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

*/

/*

* Xbios SDL video driver

*

* Patrice Mandin

*/

#include <sys/stat.h>

#include <unistd.h>

/* Mint includes */

#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"

#define XBIOS_VID_DRIVER_NAME "xbios"

#define DEBUG_PRINT(what) \

{ \

printf what; \

}

#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);

/* OpenGL functions */

static void XBIOS_GL_SwapBuffers(_THIS);

#endif

/* To setup palette */

static unsigned short TT_palette[256];

static unsigned long F30_palette[256];

/* Xbios driver bootstrap functions */

static int XBIOS_Available(void)

{

/* 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;

}

/* 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 (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {

if (!SDL_XBIOS_SB3Usable((scpn_cookie_t *)cookie_scpn)) {

return 0;

}

}

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 */

}

if ( (device == NULL) || (device->hidden == NULL) ) {

SDL_OutOfMemory();

if ( 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;

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, Uint16 modecode, Uint16 width, Uint16 height,

Uint16 depth, SDL_bool flags)

{

int i, curpos;

xbiosmode_t *current_mode;

/* Check if mode already exists */

if (XBIOS_modelist) {

current_mode = XBIOS_modelist;

for (i=0;i<XBIOS_nummodes; i++, current_mode++) {

if (current_mode->width != width)

continue;

if (current_mode->height != height)

continue;

if (current_mode->depth != depth)

continue;

return;

}

}

++XBIOS_nummodes;

/* Keep the list sorted: bpp, width, height */

curpos=0;

for(i=0; i<XBIOS_nummodes-1; i++) {

if (XBIOS_modelist[i].depth <= depth) {

if (XBIOS_modelist[i].width < width) {

break;

} else if (XBIOS_modelist[i].width == width) {

if (XBIOS_modelist[i].height <= height) {

break;

}

}

}

curpos++;

}

/* Push remaining modes further */

for(i=XBIOS_nummodes-1; i>curpos; i--) {

}

XBIOS_modelist[curpos].number = modecode;

XBIOS_modelist[curpos].width = width;

XBIOS_modelist[curpos].height = height;

XBIOS_modelist[curpos].depth = depth;

XBIOS_modelist[curpos].doubleline = flags;

}

static int XBIOS_VideoInit(_THIS, SDL_PixelFormat *vformat)

{

int i,j8,j16;

xbiosmode_t *current_mode;

/* Initialize all variables that we clean on shutdown */

memset (SDL_modelist, 0, sizeof(SDL_modelist));

/* 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 */

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_nummodes = 0;

XBIOS_modelist = NULL;

switch (XBIOS_cvdo >>16) {

case VDO_ST:

case VDO_STE:

{

short *oldpalette;

XBIOS_oldvbase=Physbase();

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;

default:

XBIOS_oldnumcol=0;

break;

}

oldpalette= (short *) XBIOS_oldpalette;

for (i=0;i<XBIOS_oldnumcol;i++) {

*oldpalette++=Setcolor(i,-1);

}

vformat->BitsPerPixel = 8;

}

break;

case VDO_TT:

SDL_XBIOS_AddMode(this, TT_LOW,320,480,8,SDL_FALSE);

/* Software double-lined mode */

SDL_XBIOS_AddMode(this, TT_LOW,320,240,8,SDL_TRUE);

XBIOS_oldvbase=Logbase();

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;

default:

XBIOS_oldnumcol=0;

break;

}

if (XBIOS_oldnumcol) {

EgetPalette(0, XBIOS_oldnumcol, XBIOS_oldpalette);

}

vformat->BitsPerPixel = 8;

break;

case VDO_F30:

{

case MONITOR_MONO:

/* Not usable */

break;

case MONITOR_RGB:

case MONITOR_TV:

SDL_XBIOS_AddMode(this, BPS16|COL80|OVERSCAN|VERTFLAG,768,480,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|COL80|OVERSCAN,768,240,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|COL80|VERTFLAG,640,400,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|COL80,640,200,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|OVERSCAN|VERTFLAG,384,480,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|OVERSCAN,384,240,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|VERTFLAG,320,400,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16,320,200,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80|OVERSCAN|VERTFLAG,768,480,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80|OVERSCAN,768,240,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80|VERTFLAG,640,400,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80,640,200,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|OVERSCAN|VERTFLAG,384,480,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|OVERSCAN,384,240,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|VERTFLAG,320,400,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8,320,200,8,SDL_FALSE);

break;

case MONITOR_VGA:

SDL_XBIOS_AddMode(this, BPS16,320,480,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS16|VERTFLAG,320,240,16,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80,640,480,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|COL80|VERTFLAG,640,240,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8,320,480,8,SDL_FALSE);

SDL_XBIOS_AddMode(this, BPS8|VERTFLAG,320,240,8,SDL_FALSE);

break;

}

XBIOS_oldvbase=Logbase();

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;

/* Keep vga/rvb, and pal/ntsc bits */

current_mode = XBIOS_modelist;

for (i=0;i<XBIOS_nummodes;i++) {

Uint16 newvmode;

newvmode = current_mode->number;

newvmode &= ~(VGA|PAL);

newvmode |= XBIOS_oldvmode & (VGA|PAL);

current_mode->number = newvmode;

current_mode++;

}

if (Getcookie(C_BLOW, &cookie_blow) == C_FOUND) {

SDL_XBIOS_BlowupInit(this, (blow_cookie_t *)cookie_blow);

} else if (Getcookie(C_SCPN, &cookie_scpn) == C_FOUND) {

SDL_XBIOS_SB3Init(this, (scpn_cookie_t *)cookie_scpn);

XBIOS_oldvmode = SDL_XBIOS_CentscreenInit(this);

XBIOS_centscreen = SDL_TRUE;

break;

}

/* Determine the current screen size */

if ( XBIOS_nummodes > 0 ) {

this->info.current_w = XBIOS_modelist[0].width;

this->info.current_h = XBIOS_modelist[0].height;

}

current_mode = XBIOS_modelist;

j8 = j16 = 0;

switch (current_mode->depth) {

case 4:

case 8:

SDL_modelist[0][j8]->x = SDL_modelist[0][j8]->y = 0;

SDL_modelist[0][j8]->w = current_mode->width;

SDL_modelist[0][j8]->h = current_mode->height;

XBIOS_videomodes[0][j8]=current_mode;

j8++;

break;

case 16:

SDL_modelist[1][j16]->x = SDL_modelist[1][j16]->y = 0;

SDL_modelist[1][j16]->w = current_mode->width;

SDL_modelist[1][j16]->h = current_mode->height;

XBIOS_videomodes[1][j16]=current_mode;

j16++;

break;

}

}

SDL_modelist[0][j8] = NULL;

SDL_modelist[1][j16] = NULL;

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_AtariGL_InitPointers(this);

#endif

/* We're done! */

return(0);

}

static SDL_Rect **XBIOS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)

{

/* 8 bits -> list 0 */

/* 16 bits -> list 1 */

return NULL;

}

}

static void XBIOS_FreeBuffers(_THIS)

{

int i;

for (i=0;i<2;i++) {

if (XBIOS_screensmem[i]!=NULL) {

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;

xbiosmode_t *new_video_mode;

Uint32 new_screen_size;

Uint32 modeflags;

/* Free current buffers */

XBIOS_FreeBuffers(this);

/* Limit bpp */

if (bpp>16) {

bpp = 16;

}

/* Search if the mode exists (width, height, bpp) */

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);

}

/* Allocate needed buffers: simple/double buffer and shadow surface */

new_video_mode = XBIOS_videomodes[bpp][mode];

new_depth = new_video_mode->depth;

if (new_depth == 4) {

} 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_depth == 8) {

XBIOS_shadowscreen = Atari_SysMalloc(new_screen_size, MX_PREFTTRAM);

if (XBIOS_shadowscreen == NULL) {

return (NULL);

}

}

/* Output buffer needs to be twice in size for the software double-line mode */

XBIOS_doubleline = SDL_FALSE;

if (new_video_mode->doubleline) {

new_screen_size <<= 1;

XBIOS_doubleline = SDL_TRUE;

}

XBIOS_screensmem[0] = Atari_SysMalloc(new_screen_size, MX_STRAM);

if (XBIOS_screensmem[0]==NULL) {

XBIOS_FreeBuffers(this);

return (NULL);

}

XBIOS_screens[0]=(void *) (( (long) XBIOS_screensmem[0]+256) & 0xFFFFFF00UL);

if (this->gl_config.double_buffer) {

flags |= SDL_DOUBLEBUF;

}

}

#endif

/* Double buffer ? */

if (flags & SDL_DOUBLEBUF) {

XBIOS_screensmem[1] = Atari_SysMalloc(new_screen_size, MX_STRAM);

if (XBIOS_screensmem[1]==NULL) {

XBIOS_FreeBuffers(this);

return (NULL);

}

XBIOS_screens[1]=(void *) (( (long) XBIOS_screensmem[1]+256) & 0xFFFFFF00UL);

modeflags |= SDL_DOUBLEBUF;

}

/* 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);

}

current->w = XBIOS_width = width;

current->h = XBIOS_height = 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_depth == 8)

current->pixels = XBIOS_shadowscreen;

else

current->pixels = XBIOS_screens[0];

XBIOS_fbnum = 0;

SDL_SetError("Can not create OpenGL context");

return NULL;

}

}

#endif

current->flags = modeflags;

switch(XBIOS_cvdo >> 16) {

case VDO_ST:

/* Reset palette */

for (i=0;i<16;i++) {

break;

case VDO_STE:

/* 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;

}

break;

case VDO_TT:

break;

case VDO_F30:

if (XBIOS_centscreen) {

SDL_XBIOS_CentscreenSetmode(this, width, height, new_depth);

} else {

/* Set hardware palette to black in True Colour */

if (new_depth == 16) {

VsetRGB(0,256,F30_palette);

}

break;

}

Vsync();

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 ((surface->format->BitsPerPixel) == 8) {

int i;

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_pitch * rects[i].y;

destination += x1;

/* Convert chunky to planar screen */

source,

destination,

x2-x1,

rects[i].h,

surface->pitch,

XBIOS_pitch

);

}

}

Vsync();

if ((surface->flags & SDL_DOUBLEBUF) == SDL_DOUBLEBUF) {

XBIOS_fbnum ^= 1;

if ((surface->format->BitsPerPixel) > 8) {

surface->pixels=XBIOS_screens[XBIOS_fbnum];

}

}

}

static int XBIOS_FlipHWSurface(_THIS, SDL_Surface *surface)

{

if ((surface->format->BitsPerPixel) == 8) {

void *destscr;

int destx;

/* Center on destination screen */

destscr = XBIOS_screens[XBIOS_fbnum];

destscr += XBIOS_pitch * ((XBIOS_height - surface->h) >> 1);

destx = (XBIOS_width - surface->w) >> 1;

destx &= ~15;

destscr += destx;