/*

SDL - Simple DirectMedia Layer

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

slouken@libsdl.org

*/

#ifdef SAVE_RCSID

static char rcsid =

"@(#) $Id$";

#endif

/*

* Chunky to planar conversion routine

* for 68060 CPU, without movep instruction

* 1 byte/pixel -> 4 or 8 bit planes

*

* Patrice Mandin

*/

#include <string.h>

#include "SDL_ataric2p_s.h"

/*--- Variables ---*/

/* CPU is 060 ? */

int atari_cpu060_avail;

/*--- Functions ---*/

void atari_test_cpu060_present(void)

{

unsigned long cookie_cpu;

atari_cpu060_avail=0;

/* Cookie _CPU present ? */

if (Getcookie(C__CPU, &cookie_cpu) == C_FOUND) {

atari_cpu060_avail = (cookie_cpu == 60);

}

}

void Atari_C2pConvert8_060(

Uint8 *src, /* Source screen (one byte=one pixel) */

Uint8 *dest, /* Destination (8 bits planes) */

Uint32 width, /* Dimensions of screen to convert */

Uint32 height,

Uint32 dblligne, /* Double the lines when converting ? */

Uint32 srcpitch, /* Length of one source line in bytes */

Uint32 dstpitch /* Length of one destination line in bytes */

)

{

int x,y,z;

Uint8 *src_line, *dst_line;

for (y=0; y<height; y++) {

src_line = src;

dst_line = dest;

for (x=0; x<(width>>4); x++) {

Uint32 somme1, somme2;

Uint32 *convtable;

/* bytes 0-7 */

somme1 = somme2 = 0;

for (z=0; z<8 ;z++) {

convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3];

somme1 <<= 1;

somme2 <<= 1;

somme1 |= *convtable++;

somme2 |= *convtable;

}

*(dst_line+14) = somme2; /* 000000FF */

*(dst_line+6) = somme1; /* 000000FF */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+12) = somme2; /* 0000FF00 */

*(dst_line+4) = somme1; /* 0000FF00 */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+10) = somme2; /* 00FF0000 */

*(dst_line+2) = somme1; /* 00FF0000 */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+8) = somme2; /* FF000000 */

*dst_line++ = somme1; /* FF000000 */

/* bytes 8-15 */

somme1 = somme2 = 0;

for (z=0; z<8 ;z++) {

convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3];

somme1 <<= 1;

somme2 <<= 1;

somme1 |= *convtable++;

somme2 |= *convtable;

}

*(dst_line+14) = somme2; /* 000000FF */

*(dst_line+6) = somme1; /* 000000FF */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+12) = somme2; /* 0000FF00 */

*(dst_line+4) = somme1; /* 0000FF00 */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+10) = somme2; /* 00FF0000 */

*(dst_line+2) = somme1; /* 00FF0000 */

somme2 >>= 8;

somme1 >>= 8;

*(dst_line+8) = somme2; /* FF000000 */

*dst_line = somme1; /* FF000000 */

dst_line += 15;

}

if (dblligne) {

memcpy(dest+dstpitch, dest, width);

dest += dstpitch;

}

src += srcpitch;

dest += dstpitch;

}

}

void Atari_C2pConvert4_060(

Uint8 *src, /* Source screen (one byte=one pixel) */

Uint8 *dest, /* Destination (4 bits planes) */

Uint32 width, /* Dimensions of screen to convert */

Uint32 height,

Uint32 dblligne, /* Double the lines when converting ? */

Uint32 srcpitch, /* Length of one source line in bytes */

Uint32 dstpitch /* Length of one destination line in bytes */

)

{

int x,y,z;

Uint8 *src_line, *dst_line;

for (y=0;y<height;y++) {

src_line = src;

dst_line = dest;

for (x=0; x<(width>>4);x++) {

Uint32 somme;

Uint32 *convtable;

/* bytes 0-7 */

somme=0;

for (z=0; z<8 ; z++) {

convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2];

somme <<= 1;

somme |= *convtable;

}

*(dst_line+6) = somme; somme >>= 8; /* 000000FF */

*(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */

*(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */

*dst_line++ = somme; /* FF000000 */

/* bytes 8-15 */

somme = 0;

for (z=0; z<8 ;z++) {

convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2];

somme <<= 1;

somme |= *convtable;

}

*(dst_line+6) = somme; somme >>= 8; /* 000000FF */

*(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */

*(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */

*dst_line = somme; /* FF000000 */

dst_line += 7;

}

if (dblligne) {

memcpy(dest+dstpitch, dest, width>>1);

dest += dstpitch;

}

src += srcpitch;

dest += dstpitch;

}

}