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annotate src/video/ataricommon/SDL_ataric2p060.c @ 610:95433459fbd2

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Date: Mon, 14 Apr 2003 22:08:27 +0100 From: Patrice Mandin Subject: [SDL][PATCH] 2 patches for sdl Here are 2 patches for SDL: - One is to put the dummy video drivers at the end of the video drivers list. It gave me problems, when SDL_VIDEODRIVER is not set, and the dummy driver is used instead of the platform's driver, just because it is always available. So the dummy driver must always be at the end of the list. I suppose picogui and dc video drivers also don't work.
author Sam Lantinga <slouken@libsdl.org>
date Tue, 15 Apr 2003 15:46:56 +0000
parents 0ce5a68278fd
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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 <mint/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 }