Mercurial > sdl-ios-xcode
view src/video/ataricommon/SDL_ataric2p060.c @ 630:550bccdf04bd
Added initial support for RISC OS (thanks Peter Naulls!)
author | Sam Lantinga <slouken@libsdl.org> |
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date | Thu, 29 May 2003 04:44:13 +0000 |
parents | 0ce5a68278fd |
children |
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/* SDL - Simple DirectMedia Layer Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga 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 <mint/cookie.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; } }