Mercurial > sdl-ios-xcode
annotate src/video/ataricommon/SDL_ataric2p060.c @ 297:f6ffac90895c
Updated copyright information for 2002
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 06 Mar 2002 11:23:08 +0000 |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Library General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Library General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Library General Public |
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16 License along with this library; if not, write to the Free |
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 |
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23 #ifdef SAVE_RCSID |
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24 static char rcsid = |
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25 "@(#) $Id$"; |
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26 #endif |
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27 |
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28 /* |
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29 * Chunky to planar conversion routine |
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30 * for 68060 CPU, without movep instruction |
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31 * 1 byte/pixel -> 4 or 8 bit planes |
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32 * |
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33 * Patrice Mandin |
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34 */ |
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35 |
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36 #include <string.h> |
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37 |
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38 #include <sys/cookie.h> |
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39 |
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40 #include "SDL_ataric2p_s.h" |
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41 |
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42 /*--- Variables ---*/ |
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43 |
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44 /* CPU is 060 ? */ |
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45 int atari_cpu060_avail; |
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46 |
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47 /*--- Functions ---*/ |
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48 |
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49 void atari_test_cpu060_present(void) |
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50 { |
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51 unsigned long cookie_cpu; |
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52 |
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53 atari_cpu060_avail=0; |
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54 |
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55 /* Cookie _CPU present ? */ |
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56 if (Getcookie(C__CPU, &cookie_cpu) == C_FOUND) { |
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57 atari_cpu060_avail = (cookie_cpu == 60); |
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58 } |
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59 } |
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60 |
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61 void Atari_C2pConvert8_060( |
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62 Uint8 *src, /* Source screen (one byte=one pixel) */ |
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63 Uint8 *dest, /* Destination (8 bits planes) */ |
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64 Uint32 width, /* Dimensions of screen to convert */ |
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65 Uint32 height, |
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66 Uint32 dblligne, /* Double the lines when converting ? */ |
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67 Uint32 srcpitch, /* Length of one source line in bytes */ |
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68 Uint32 dstpitch /* Length of one destination line in bytes */ |
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69 ) |
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70 { |
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71 int x,y,z; |
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72 Uint8 *src_line, *dst_line; |
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73 |
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74 for (y=0; y<height; y++) { |
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75 src_line = src; |
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76 dst_line = dest; |
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77 |
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78 for (x=0; x<(width>>4); x++) { |
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79 Uint32 somme1, somme2; |
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80 Uint32 *convtable; |
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81 |
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82 /* bytes 0-7 */ |
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83 somme1 = somme2 = 0; |
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84 for (z=0; z<8 ;z++) { |
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85 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3]; |
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86 somme1 <<= 1; |
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87 somme2 <<= 1; |
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88 somme1 |= *convtable++; |
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89 somme2 |= *convtable; |
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90 } |
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91 |
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92 *(dst_line+14) = somme2; /* 000000FF */ |
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93 *(dst_line+6) = somme1; /* 000000FF */ |
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94 somme2 >>= 8; |
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95 somme1 >>= 8; |
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96 *(dst_line+12) = somme2; /* 0000FF00 */ |
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97 *(dst_line+4) = somme1; /* 0000FF00 */ |
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98 somme2 >>= 8; |
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99 somme1 >>= 8; |
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100 *(dst_line+10) = somme2; /* 00FF0000 */ |
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101 *(dst_line+2) = somme1; /* 00FF0000 */ |
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102 somme2 >>= 8; |
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103 somme1 >>= 8; |
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104 *(dst_line+8) = somme2; /* FF000000 */ |
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105 *dst_line++ = somme1; /* FF000000 */ |
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106 |
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107 /* bytes 8-15 */ |
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108 somme1 = somme2 = 0; |
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109 for (z=0; z<8 ;z++) { |
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110 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<3]; |
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111 somme1 <<= 1; |
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112 somme2 <<= 1; |
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113 somme1 |= *convtable++; |
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114 somme2 |= *convtable; |
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115 } |
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116 |
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117 *(dst_line+14) = somme2; /* 000000FF */ |
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118 *(dst_line+6) = somme1; /* 000000FF */ |
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119 somme2 >>= 8; |
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120 somme1 >>= 8; |
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121 *(dst_line+12) = somme2; /* 0000FF00 */ |
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122 *(dst_line+4) = somme1; /* 0000FF00 */ |
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123 somme2 >>= 8; |
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124 somme1 >>= 8; |
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125 *(dst_line+10) = somme2; /* 00FF0000 */ |
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126 *(dst_line+2) = somme1; /* 00FF0000 */ |
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127 somme2 >>= 8; |
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128 somme1 >>= 8; |
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129 *(dst_line+8) = somme2; /* FF000000 */ |
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130 *dst_line = somme1; /* FF000000 */ |
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131 |
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132 dst_line += 15; |
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133 } |
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134 |
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135 if (dblligne) { |
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136 memcpy(dest+dstpitch, dest, width); |
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137 dest += dstpitch; |
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138 } |
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139 |
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140 src += srcpitch; |
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141 dest += dstpitch; |
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142 } |
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143 } |
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144 |
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145 void Atari_C2pConvert4_060( |
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146 Uint8 *src, /* Source screen (one byte=one pixel) */ |
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147 Uint8 *dest, /* Destination (4 bits planes) */ |
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148 Uint32 width, /* Dimensions of screen to convert */ |
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149 Uint32 height, |
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150 Uint32 dblligne, /* Double the lines when converting ? */ |
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151 Uint32 srcpitch, /* Length of one source line in bytes */ |
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152 Uint32 dstpitch /* Length of one destination line in bytes */ |
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153 ) |
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154 { |
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155 int x,y,z; |
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156 Uint8 *src_line, *dst_line; |
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157 |
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158 for (y=0;y<height;y++) { |
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159 src_line = src; |
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160 dst_line = dest; |
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161 |
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162 for (x=0; x<(width>>4);x++) { |
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163 Uint32 somme; |
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164 Uint32 *convtable; |
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165 |
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166 /* bytes 0-7 */ |
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167 somme=0; |
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168 for (z=0; z<8 ; z++) { |
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169 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2]; |
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170 somme <<= 1; |
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171 somme |= *convtable; |
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172 } |
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173 |
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174 *(dst_line+6) = somme; somme >>= 8; /* 000000FF */ |
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175 *(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */ |
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176 *(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */ |
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177 *dst_line++ = somme; /* FF000000 */ |
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178 |
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179 /* bytes 8-15 */ |
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180 somme = 0; |
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181 for (z=0; z<8 ;z++) { |
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182 convtable = (Uint32 *) &Atari_table_c2p[(*src_line++)<<2]; |
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183 somme <<= 1; |
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184 somme |= *convtable; |
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185 } |
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186 |
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187 *(dst_line+6) = somme; somme >>= 8; /* 000000FF */ |
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188 *(dst_line+4) = somme; somme >>= 8; /* 0000FF00 */ |
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189 *(dst_line+2) = somme; somme >>= 8; /* 00FF0000 */ |
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190 *dst_line = somme; /* FF000000 */ |
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191 |
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192 dst_line += 7; |
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193 } |
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194 |
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195 if (dblligne) { |
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196 memcpy(dest+dstpitch, dest, width>>1); |
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197 dest += dstpitch; |
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198 } |
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199 |
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200 src += srcpitch; |
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201 dest += dstpitch; |
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202 } |
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203 } |