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comparison src/video/ataricommon/SDL_ataric2p060.c @ 281:c5010ab8ba35

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Added initial support for Atari (thanks Patrice!)
author Sam Lantinga <slouken@libsdl.org>
date Sun, 17 Feb 2002 19:54:28 +0000
parents
children f6ffac90895c
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280:0ddcea45d829 281:c5010ab8ba35
1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997, 1998, 1999, 2000, 2001 Sam Lantinga
4
5 This library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
9
10 This library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
14
15 You should have received a copy of the GNU Library General Public
16 License along with this library; if not, write to the Free
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
19 Sam Lantinga
20 slouken@libsdl.org
21 */
22
23 #ifdef SAVE_RCSID
24 static char rcsid =
25 "@(#) $Id$";
26 #endif
27
28 /*
29 * Chunky to planar conversion routine
30 * for 68060 CPU, without movep instruction
31 * 1 byte/pixel -> 4 or 8 bit planes
32 *
33 * Patrice Mandin
34 */
35
36 #include <string.h>
37
38 #include <sys/cookie.h>
39
40 #include "SDL_ataric2p_s.h"
41
42 /*--- Variables ---*/
43
44 /* CPU is 060 ? */
45 int atari_cpu060_avail;
46
47 /*--- Functions ---*/
48
49 void atari_test_cpu060_present(void)
50 {
51 unsigned long cookie_cpu;
52
53 atari_cpu060_avail=0;
54
55 /* Cookie _CPU present ? */
56 if (Getcookie(C__CPU, &cookie_cpu) == C_FOUND) {
57 atari_cpu060_avail = (cookie_cpu == 60);
58 }
59 }
60
61 void Atari_C2pConvert8_060(
62 Uint8 *src, /* Source screen (one byte=one pixel) */
63 Uint8 *dest, /* Destination (8 bits planes) */
64 Uint32 width, /* Dimensions of screen to convert */
65 Uint32 height,
66 Uint32 dblligne, /* Double the lines when converting ? */
67 Uint32 srcpitch, /* Length of one source line in bytes */
68 Uint32 dstpitch /* Length of one destination line in bytes */
69 )
70 {
71 int x,y,z;
72 Uint8 *src_line, *dst_line;
73
74 for (y=0; y<height; y++) {
75 src_line = src;
76 dst_line = dest;
77
78 for (x=0; x<(width>>4); x++) {
79 Uint32 somme1, somme2;
80 Uint32 *convtable;
81
82 /* bytes 0-7 */
83 somme1 = somme2 = 0;
84 for (z=0; z<8 ;z++) {
85 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3];
86 somme1 <<= 1;
87 somme2 <<= 1;
88 somme1 |= *convtable++;
89 somme2 |= *convtable;
90 }
91
92 *(dst_line+14) = somme2; /* 000000FF */
93 *(dst_line+6) = somme1; /* 000000FF */
94 somme2 >>= 8;
95 somme1 >>= 8;
96 *(dst_line+12) = somme2; /* 0000FF00 */
97 *(dst_line+4) = somme1; /* 0000FF00 */
98 somme2 >>= 8;
99 somme1 >>= 8;
100 *(dst_line+10) = somme2; /* 00FF0000 */
101 *(dst_line+2) = somme1; /* 00FF0000 */
102 somme2 >>= 8;
103 somme1 >>= 8;
104 *(dst_line+8) = somme2; /* FF000000 */
105 *dst_line++ = somme1; /* FF000000 */
106
107 /* bytes 8-15 */
108 somme1 = somme2 = 0;
109 for (z=0; z<8 ;z++) {
110 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3];
111 somme1 <<= 1;
112 somme2 <<= 1;
113 somme1 |= *convtable++;
114 somme2 |= *convtable;
115 }
116
117 *(dst_line+14) = somme2; /* 000000FF */
118 *(dst_line+6) = somme1; /* 000000FF */
119 somme2 >>= 8;
120 somme1 >>= 8;
121 *(dst_line+12) = somme2; /* 0000FF00 */
122 *(dst_line+4) = somme1; /* 0000FF00 */
123 somme2 >>= 8;
124 somme1 >>= 8;
125 *(dst_line+10) = somme2; /* 00FF0000 */
126 *(dst_line+2) = somme1; /* 00FF0000 */
127 somme2 >>= 8;
128 somme1 >>= 8;
129 *(dst_line+8) = somme2; /* FF000000 */
130 *dst_line = somme1; /* FF000000 */
131
132 dst_line += 15;
133 }
134
135 if (dblligne) {
136 memcpy(dest+dstpitch, dest, width);
137 dest += dstpitch;
138 }
139
140 src += srcpitch;
141 dest += dstpitch;
142 }
143 }
144
145 void Atari_C2pConvert4_060(
146 Uint8 *src, /* Source screen (one byte=one pixel) */
147 Uint8 *dest, /* Destination (4 bits planes) */
148 Uint32 width, /* Dimensions of screen to convert */
149 Uint32 height,
150 Uint32 dblligne, /* Double the lines when converting ? */
151 Uint32 srcpitch, /* Length of one source line in bytes */
152 Uint32 dstpitch /* Length of one destination line in bytes */
153 )
154 {
155 int x,y,z;
156 Uint8 *src_line, *dst_line;
157
158 for (y=0;y<height;y++) {
159 src_line = src;
160 dst_line = dest;
161
162 for (x=0; x<(width>>4);x++) {
163 Uint32 somme;
164 Uint32 *convtable;
165
166 /* bytes 0-7 */
167 somme=0;
168 for (z=0; z<8 ; z++) {
169 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2];
170 somme <<= 1;
171 somme |= *convtable;
172 }
173
174 *(dst_line+6) = somme; somme >>= 8; /* 000000FF */
175 *(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */
176 *(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */
177 *dst_line++ = somme; /* FF000000 */
178
179 /* bytes 8-15 */
180 somme = 0;
181 for (z=0; z<8 ;z++) {
182 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2];
183 somme <<= 1;
184 somme |= *convtable;
185 }
186
187 *(dst_line+6) = somme; somme >>= 8; /* 000000FF */
188 *(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */
189 *(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */
190 *dst_line = somme; /* FF000000 */
191
192 dst_line += 7;
193 }
194
195 if (dblligne) {
196 memcpy(dest+dstpitch, dest, width>>1);
197 dest += dstpitch;
198 }
199
200 src += srcpitch;
201 dest += dstpitch;
202 }
203 }