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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2006 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 Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 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 Lesser 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 Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 #include "SDL_config.h" |
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23 |
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24 /* This is the software implementation of the YUV video overlay support */ |
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25 |
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26 /* This code was derived from code carrying the following copyright notices: |
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27 |
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28 * Copyright (c) 1995 The Regents of the University of California. |
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29 * All rights reserved. |
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30 * |
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31 * Permission to use, copy, modify, and distribute this software and its |
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32 * documentation for any purpose, without fee, and without written agreement is |
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33 * hereby granted, provided that the above copyright notice and the following |
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34 * two paragraphs appear in all copies of this software. |
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35 * |
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36 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR |
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37 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
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38 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF |
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39 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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40 * |
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41 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, |
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42 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY |
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43 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS |
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44 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO |
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45 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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46 |
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47 * Copyright (c) 1995 Erik Corry |
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48 * All rights reserved. |
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49 * |
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50 * Permission to use, copy, modify, and distribute this software and its |
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51 * documentation for any purpose, without fee, and without written agreement is |
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52 * hereby granted, provided that the above copyright notice and the following |
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53 * two paragraphs appear in all copies of this software. |
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54 * |
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55 * IN NO EVENT SHALL ERIK CORRY BE LIABLE TO ANY PARTY FOR DIRECT, INDIRECT, |
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56 * SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OF |
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57 * THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF ERIK CORRY HAS BEEN ADVISED |
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58 * OF THE POSSIBILITY OF SUCH DAMAGE. |
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59 * |
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60 * ERIK CORRY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT |
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61 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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62 * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" |
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63 * BASIS, AND ERIK CORRY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, |
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64 * UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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65 |
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66 * Portions of this software Copyright (c) 1995 Brown University. |
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67 * All rights reserved. |
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68 * |
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69 * Permission to use, copy, modify, and distribute this software and its |
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70 * documentation for any purpose, without fee, and without written agreement |
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71 * is hereby granted, provided that the above copyright notice and the |
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72 * following two paragraphs appear in all copies of this software. |
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73 * |
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74 * IN NO EVENT SHALL BROWN UNIVERSITY BE LIABLE TO ANY PARTY FOR |
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75 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT |
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76 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF BROWN |
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77 * UNIVERSITY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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78 * |
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79 * BROWN UNIVERSITY SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, BUT NOT |
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80 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A |
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81 * PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS ON AN "AS IS" |
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82 * BASIS, AND BROWN UNIVERSITY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, |
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83 * SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. |
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84 */ |
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85 |
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86 #include "SDL_video.h" |
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87 #include "SDL_cpuinfo.h" |
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88 #include "SDL_stretch_c.h" |
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89 #include "SDL_yuvfuncs.h" |
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90 #include "SDL_yuv_sw_c.h" |
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91 |
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92 /* The functions used to manipulate software video overlays */ |
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93 static struct private_yuvhwfuncs sw_yuvfuncs = { |
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94 SDL_LockYUV_SW, |
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95 SDL_UnlockYUV_SW, |
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96 SDL_DisplayYUV_SW, |
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97 SDL_FreeYUV_SW |
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98 }; |
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99 |
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100 /* RGB conversion lookup tables */ |
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101 struct private_yuvhwdata { |
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102 SDL_Surface *stretch; |
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103 SDL_Surface *display; |
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104 Uint8 *pixels; |
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105 int *colortab; |
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106 Uint32 *rgb_2_pix; |
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107 void (*Display1X)(int *colortab, Uint32 *rgb_2_pix, |
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108 unsigned char *lum, unsigned char *cr, |
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109 unsigned char *cb, unsigned char *out, |
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110 int rows, int cols, int mod ); |
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111 void (*Display2X)(int *colortab, Uint32 *rgb_2_pix, |
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112 unsigned char *lum, unsigned char *cr, |
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113 unsigned char *cb, unsigned char *out, |
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114 int rows, int cols, int mod ); |
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115 |
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116 /* These are just so we don't have to allocate them separately */ |
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117 Uint16 pitches[3]; |
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118 Uint8 *planes[3]; |
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119 }; |
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120 |
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121 |
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122 /* The colorspace conversion functions */ |
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123 |
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124 #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
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125 extern void Color565DitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix, |
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126 unsigned char *lum, unsigned char *cr, |
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127 unsigned char *cb, unsigned char *out, |
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128 int rows, int cols, int mod ); |
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129 extern void ColorRGBDitherYV12MMX1X( int *colortab, Uint32 *rgb_2_pix, |
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130 unsigned char *lum, unsigned char *cr, |
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131 unsigned char *cb, unsigned char *out, |
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132 int rows, int cols, int mod ); |
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133 #endif |
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134 |
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135 static void Color16DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
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136 unsigned char *lum, unsigned char *cr, |
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137 unsigned char *cb, unsigned char *out, |
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138 int rows, int cols, int mod ) |
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139 { |
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140 unsigned short* row1; |
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141 unsigned short* row2; |
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142 unsigned char* lum2; |
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143 int x, y; |
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144 int cr_r; |
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145 int crb_g; |
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146 int cb_b; |
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147 int cols_2 = cols / 2; |
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148 |
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149 row1 = (unsigned short*) out; |
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150 row2 = row1 + cols + mod; |
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151 lum2 = lum + cols; |
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152 |
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153 mod += cols + mod; |
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154 |
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155 y = rows / 2; |
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156 while( y-- ) |
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157 { |
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158 x = cols_2; |
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159 while( x-- ) |
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160 { |
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161 register int L; |
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162 |
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163 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
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164 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
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165 + colortab[ *cb + 2*256 ]; |
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166 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
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167 ++cr; ++cb; |
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168 |
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169 L = *lum++; |
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170 *row1++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
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171 rgb_2_pix[ L + crb_g ] | |
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172 rgb_2_pix[ L + cb_b ]); |
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173 |
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174 L = *lum++; |
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175 *row1++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
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176 rgb_2_pix[ L + crb_g ] | |
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177 rgb_2_pix[ L + cb_b ]); |
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178 |
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179 |
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180 /* Now, do second row. */ |
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181 |
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182 L = *lum2++; |
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183 *row2++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
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184 rgb_2_pix[ L + crb_g ] | |
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185 rgb_2_pix[ L + cb_b ]); |
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186 |
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187 L = *lum2++; |
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188 *row2++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
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189 rgb_2_pix[ L + crb_g ] | |
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190 rgb_2_pix[ L + cb_b ]); |
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191 } |
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192 |
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193 /* |
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194 * These values are at the start of the next line, (due |
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195 * to the ++'s above),but they need to be at the start |
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196 * of the line after that. |
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197 */ |
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198 lum += cols; |
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199 lum2 += cols; |
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200 row1 += mod; |
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201 row2 += mod; |
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202 } |
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203 } |
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204 |
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205 static void Color24DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
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206 unsigned char *lum, unsigned char *cr, |
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207 unsigned char *cb, unsigned char *out, |
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208 int rows, int cols, int mod ) |
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209 { |
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210 unsigned int value; |
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211 unsigned char* row1; |
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212 unsigned char* row2; |
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213 unsigned char* lum2; |
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214 int x, y; |
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215 int cr_r; |
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216 int crb_g; |
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217 int cb_b; |
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218 int cols_2 = cols / 2; |
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219 |
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220 row1 = out; |
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221 row2 = row1 + cols*3 + mod*3; |
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222 lum2 = lum + cols; |
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223 |
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224 mod += cols + mod; |
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225 mod *= 3; |
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226 |
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227 y = rows / 2; |
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228 while( y-- ) |
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229 { |
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230 x = cols_2; |
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231 while( x-- ) |
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232 { |
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233 register int L; |
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234 |
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235 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
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236 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
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237 + colortab[ *cb + 2*256 ]; |
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238 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
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239 ++cr; ++cb; |
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240 |
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241 L = *lum++; |
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242 value = (rgb_2_pix[ L + cr_r ] | |
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243 rgb_2_pix[ L + crb_g ] | |
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244 rgb_2_pix[ L + cb_b ]); |
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245 *row1++ = (value ) & 0xFF; |
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246 *row1++ = (value >> 8) & 0xFF; |
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247 *row1++ = (value >> 16) & 0xFF; |
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248 |
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249 L = *lum++; |
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250 value = (rgb_2_pix[ L + cr_r ] | |
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251 rgb_2_pix[ L + crb_g ] | |
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252 rgb_2_pix[ L + cb_b ]); |
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253 *row1++ = (value ) & 0xFF; |
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254 *row1++ = (value >> 8) & 0xFF; |
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255 *row1++ = (value >> 16) & 0xFF; |
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256 |
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257 |
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258 /* Now, do second row. */ |
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259 |
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260 L = *lum2++; |
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261 value = (rgb_2_pix[ L + cr_r ] | |
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262 rgb_2_pix[ L + crb_g ] | |
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263 rgb_2_pix[ L + cb_b ]); |
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264 *row2++ = (value ) & 0xFF; |
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265 *row2++ = (value >> 8) & 0xFF; |
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266 *row2++ = (value >> 16) & 0xFF; |
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267 |
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268 L = *lum2++; |
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269 value = (rgb_2_pix[ L + cr_r ] | |
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270 rgb_2_pix[ L + crb_g ] | |
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271 rgb_2_pix[ L + cb_b ]); |
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272 *row2++ = (value ) & 0xFF; |
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273 *row2++ = (value >> 8) & 0xFF; |
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274 *row2++ = (value >> 16) & 0xFF; |
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275 } |
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276 |
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277 /* |
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278 * These values are at the start of the next line, (due |
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279 * to the ++'s above),but they need to be at the start |
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280 * of the line after that. |
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281 */ |
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282 lum += cols; |
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283 lum2 += cols; |
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284 row1 += mod; |
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285 row2 += mod; |
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286 } |
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287 } |
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288 |
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289 static void Color32DitherYV12Mod1X( int *colortab, Uint32 *rgb_2_pix, |
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290 unsigned char *lum, unsigned char *cr, |
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291 unsigned char *cb, unsigned char *out, |
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292 int rows, int cols, int mod ) |
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293 { |
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294 unsigned int* row1; |
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295 unsigned int* row2; |
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296 unsigned char* lum2; |
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297 int x, y; |
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298 int cr_r; |
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299 int crb_g; |
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300 int cb_b; |
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301 int cols_2 = cols / 2; |
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302 |
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303 row1 = (unsigned int*) out; |
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304 row2 = row1 + cols + mod; |
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305 lum2 = lum + cols; |
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306 |
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307 mod += cols + mod; |
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308 |
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309 y = rows / 2; |
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310 while( y-- ) |
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311 { |
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312 x = cols_2; |
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313 while( x-- ) |
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314 { |
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315 register int L; |
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316 |
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317 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
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318 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
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319 + colortab[ *cb + 2*256 ]; |
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320 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
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321 ++cr; ++cb; |
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322 |
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323 L = *lum++; |
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324 *row1++ = (rgb_2_pix[ L + cr_r ] | |
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325 rgb_2_pix[ L + crb_g ] | |
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326 rgb_2_pix[ L + cb_b ]); |
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327 |
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328 L = *lum++; |
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329 *row1++ = (rgb_2_pix[ L + cr_r ] | |
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330 rgb_2_pix[ L + crb_g ] | |
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331 rgb_2_pix[ L + cb_b ]); |
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332 |
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333 |
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334 /* Now, do second row. */ |
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335 |
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336 L = *lum2++; |
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337 *row2++ = (rgb_2_pix[ L + cr_r ] | |
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338 rgb_2_pix[ L + crb_g ] | |
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339 rgb_2_pix[ L + cb_b ]); |
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340 |
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341 L = *lum2++; |
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342 *row2++ = (rgb_2_pix[ L + cr_r ] | |
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343 rgb_2_pix[ L + crb_g ] | |
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344 rgb_2_pix[ L + cb_b ]); |
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345 } |
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346 |
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347 /* |
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348 * These values are at the start of the next line, (due |
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349 * to the ++'s above),but they need to be at the start |
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350 * of the line after that. |
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351 */ |
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352 lum += cols; |
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353 lum2 += cols; |
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354 row1 += mod; |
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355 row2 += mod; |
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356 } |
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357 } |
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358 |
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359 /* |
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360 * In this function I make use of a nasty trick. The tables have the lower |
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361 * 16 bits replicated in the upper 16. This means I can write ints and get |
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362 * the horisontal doubling for free (almost). |
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363 */ |
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364 static void Color16DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
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365 unsigned char *lum, unsigned char *cr, |
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366 unsigned char *cb, unsigned char *out, |
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367 int rows, int cols, int mod ) |
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368 { |
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369 unsigned int* row1 = (unsigned int*) out; |
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370 const int next_row = cols+(mod/2); |
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371 unsigned int* row2 = row1 + 2*next_row; |
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372 unsigned char* lum2; |
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373 int x, y; |
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374 int cr_r; |
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375 int crb_g; |
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376 int cb_b; |
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377 int cols_2 = cols / 2; |
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378 |
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379 lum2 = lum + cols; |
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380 |
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381 mod = (next_row * 3) + (mod/2); |
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382 |
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383 y = rows / 2; |
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384 while( y-- ) |
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385 { |
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386 x = cols_2; |
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387 while( x-- ) |
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388 { |
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389 register int L; |
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390 |
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391 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
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392 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
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393 + colortab[ *cb + 2*256 ]; |
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394 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
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395 ++cr; ++cb; |
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396 |
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397 L = *lum++; |
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398 row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] | |
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399 rgb_2_pix[ L + crb_g ] | |
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400 rgb_2_pix[ L + cb_b ]); |
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401 row1++; |
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402 |
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403 L = *lum++; |
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404 row1[0] = row1[next_row] = (rgb_2_pix[ L + cr_r ] | |
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405 rgb_2_pix[ L + crb_g ] | |
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406 rgb_2_pix[ L + cb_b ]); |
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407 row1++; |
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408 |
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409 |
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410 /* Now, do second row. */ |
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411 |
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412 L = *lum2++; |
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413 row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] | |
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414 rgb_2_pix[ L + crb_g ] | |
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415 rgb_2_pix[ L + cb_b ]); |
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416 row2++; |
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417 |
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418 L = *lum2++; |
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419 row2[0] = row2[next_row] = (rgb_2_pix[ L + cr_r ] | |
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420 rgb_2_pix[ L + crb_g ] | |
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421 rgb_2_pix[ L + cb_b ]); |
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422 row2++; |
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423 } |
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424 |
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425 /* |
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426 * These values are at the start of the next line, (due |
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427 * to the ++'s above),but they need to be at the start |
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428 * of the line after that. |
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429 */ |
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430 lum += cols; |
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431 lum2 += cols; |
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432 row1 += mod; |
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433 row2 += mod; |
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434 } |
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435 } |
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436 |
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437 static void Color24DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
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438 unsigned char *lum, unsigned char *cr, |
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439 unsigned char *cb, unsigned char *out, |
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440 int rows, int cols, int mod ) |
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441 { |
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442 unsigned int value; |
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443 unsigned char* row1 = out; |
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444 const int next_row = (cols*2 + mod) * 3; |
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445 unsigned char* row2 = row1 + 2*next_row; |
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446 unsigned char* lum2; |
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447 int x, y; |
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448 int cr_r; |
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449 int crb_g; |
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450 int cb_b; |
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451 int cols_2 = cols / 2; |
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452 |
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453 lum2 = lum + cols; |
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454 |
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455 mod = next_row*3 + mod*3; |
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456 |
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457 y = rows / 2; |
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458 while( y-- ) |
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459 { |
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460 x = cols_2; |
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461 while( x-- ) |
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462 { |
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463 register int L; |
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464 |
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465 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
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466 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
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467 + colortab[ *cb + 2*256 ]; |
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468 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
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469 ++cr; ++cb; |
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470 |
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471 L = *lum++; |
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472 value = (rgb_2_pix[ L + cr_r ] | |
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473 rgb_2_pix[ L + crb_g ] | |
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474 rgb_2_pix[ L + cb_b ]); |
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475 row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] = |
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476 (value ) & 0xFF; |
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477 row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] = |
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478 (value >> 8) & 0xFF; |
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479 row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] = |
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480 (value >> 16) & 0xFF; |
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481 row1 += 2*3; |
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482 |
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483 L = *lum++; |
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484 value = (rgb_2_pix[ L + cr_r ] | |
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485 rgb_2_pix[ L + crb_g ] | |
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486 rgb_2_pix[ L + cb_b ]); |
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487 row1[0+0] = row1[3+0] = row1[next_row+0] = row1[next_row+3+0] = |
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488 (value ) & 0xFF; |
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489 row1[0+1] = row1[3+1] = row1[next_row+1] = row1[next_row+3+1] = |
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490 (value >> 8) & 0xFF; |
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491 row1[0+2] = row1[3+2] = row1[next_row+2] = row1[next_row+3+2] = |
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492 (value >> 16) & 0xFF; |
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493 row1 += 2*3; |
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494 |
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495 |
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496 /* Now, do second row. */ |
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497 |
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498 L = *lum2++; |
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499 value = (rgb_2_pix[ L + cr_r ] | |
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500 rgb_2_pix[ L + crb_g ] | |
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501 rgb_2_pix[ L + cb_b ]); |
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502 row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] = |
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503 (value ) & 0xFF; |
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504 row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] = |
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505 (value >> 8) & 0xFF; |
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506 row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] = |
|
507 (value >> 16) & 0xFF; |
|
508 row2 += 2*3; |
|
509 |
|
510 L = *lum2++; |
|
511 value = (rgb_2_pix[ L + cr_r ] | |
|
512 rgb_2_pix[ L + crb_g ] | |
|
513 rgb_2_pix[ L + cb_b ]); |
|
514 row2[0+0] = row2[3+0] = row2[next_row+0] = row2[next_row+3+0] = |
|
515 (value ) & 0xFF; |
|
516 row2[0+1] = row2[3+1] = row2[next_row+1] = row2[next_row+3+1] = |
|
517 (value >> 8) & 0xFF; |
|
518 row2[0+2] = row2[3+2] = row2[next_row+2] = row2[next_row+3+2] = |
|
519 (value >> 16) & 0xFF; |
|
520 row2 += 2*3; |
|
521 } |
|
522 |
|
523 /* |
|
524 * These values are at the start of the next line, (due |
|
525 * to the ++'s above),but they need to be at the start |
|
526 * of the line after that. |
|
527 */ |
|
528 lum += cols; |
|
529 lum2 += cols; |
|
530 row1 += mod; |
|
531 row2 += mod; |
|
532 } |
|
533 } |
|
534 |
|
535 static void Color32DitherYV12Mod2X( int *colortab, Uint32 *rgb_2_pix, |
|
536 unsigned char *lum, unsigned char *cr, |
|
537 unsigned char *cb, unsigned char *out, |
|
538 int rows, int cols, int mod ) |
|
539 { |
|
540 unsigned int* row1 = (unsigned int*) out; |
|
541 const int next_row = cols*2+mod; |
|
542 unsigned int* row2 = row1 + 2*next_row; |
|
543 unsigned char* lum2; |
|
544 int x, y; |
|
545 int cr_r; |
|
546 int crb_g; |
|
547 int cb_b; |
|
548 int cols_2 = cols / 2; |
|
549 |
|
550 lum2 = lum + cols; |
|
551 |
|
552 mod = (next_row * 3) + mod; |
|
553 |
|
554 y = rows / 2; |
|
555 while( y-- ) |
|
556 { |
|
557 x = cols_2; |
|
558 while( x-- ) |
|
559 { |
|
560 register int L; |
|
561 |
|
562 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
563 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
564 + colortab[ *cb + 2*256 ]; |
|
565 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
566 ++cr; ++cb; |
|
567 |
|
568 L = *lum++; |
|
569 row1[0] = row1[1] = row1[next_row] = row1[next_row+1] = |
|
570 (rgb_2_pix[ L + cr_r ] | |
|
571 rgb_2_pix[ L + crb_g ] | |
|
572 rgb_2_pix[ L + cb_b ]); |
|
573 row1 += 2; |
|
574 |
|
575 L = *lum++; |
|
576 row1[0] = row1[1] = row1[next_row] = row1[next_row+1] = |
|
577 (rgb_2_pix[ L + cr_r ] | |
|
578 rgb_2_pix[ L + crb_g ] | |
|
579 rgb_2_pix[ L + cb_b ]); |
|
580 row1 += 2; |
|
581 |
|
582 |
|
583 /* Now, do second row. */ |
|
584 |
|
585 L = *lum2++; |
|
586 row2[0] = row2[1] = row2[next_row] = row2[next_row+1] = |
|
587 (rgb_2_pix[ L + cr_r ] | |
|
588 rgb_2_pix[ L + crb_g ] | |
|
589 rgb_2_pix[ L + cb_b ]); |
|
590 row2 += 2; |
|
591 |
|
592 L = *lum2++; |
|
593 row2[0] = row2[1] = row2[next_row] = row2[next_row+1] = |
|
594 (rgb_2_pix[ L + cr_r ] | |
|
595 rgb_2_pix[ L + crb_g ] | |
|
596 rgb_2_pix[ L + cb_b ]); |
|
597 row2 += 2; |
|
598 } |
|
599 |
|
600 /* |
|
601 * These values are at the start of the next line, (due |
|
602 * to the ++'s above),but they need to be at the start |
|
603 * of the line after that. |
|
604 */ |
|
605 lum += cols; |
|
606 lum2 += cols; |
|
607 row1 += mod; |
|
608 row2 += mod; |
|
609 } |
|
610 } |
|
611 |
|
612 static void Color16DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
|
613 unsigned char *lum, unsigned char *cr, |
|
614 unsigned char *cb, unsigned char *out, |
|
615 int rows, int cols, int mod ) |
|
616 { |
|
617 unsigned short* row; |
|
618 int x, y; |
|
619 int cr_r; |
|
620 int crb_g; |
|
621 int cb_b; |
|
622 int cols_2 = cols / 2; |
|
623 |
|
624 row = (unsigned short*) out; |
|
625 |
|
626 y = rows; |
|
627 while( y-- ) |
|
628 { |
|
629 x = cols_2; |
|
630 while( x-- ) |
|
631 { |
|
632 register int L; |
|
633 |
|
634 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
635 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
636 + colortab[ *cb + 2*256 ]; |
|
637 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
638 cr += 4; cb += 4; |
|
639 |
|
640 L = *lum; lum += 2; |
|
641 *row++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
|
642 rgb_2_pix[ L + crb_g ] | |
|
643 rgb_2_pix[ L + cb_b ]); |
|
644 |
|
645 L = *lum; lum += 2; |
|
646 *row++ = (unsigned short)(rgb_2_pix[ L + cr_r ] | |
|
647 rgb_2_pix[ L + crb_g ] | |
|
648 rgb_2_pix[ L + cb_b ]); |
|
649 |
|
650 } |
|
651 |
|
652 row += mod; |
|
653 } |
|
654 } |
|
655 |
|
656 static void Color24DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
|
657 unsigned char *lum, unsigned char *cr, |
|
658 unsigned char *cb, unsigned char *out, |
|
659 int rows, int cols, int mod ) |
|
660 { |
|
661 unsigned int value; |
|
662 unsigned char* row; |
|
663 int x, y; |
|
664 int cr_r; |
|
665 int crb_g; |
|
666 int cb_b; |
|
667 int cols_2 = cols / 2; |
|
668 |
|
669 row = (unsigned char*) out; |
|
670 mod *= 3; |
|
671 y = rows; |
|
672 while( y-- ) |
|
673 { |
|
674 x = cols_2; |
|
675 while( x-- ) |
|
676 { |
|
677 register int L; |
|
678 |
|
679 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
680 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
681 + colortab[ *cb + 2*256 ]; |
|
682 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
683 cr += 4; cb += 4; |
|
684 |
|
685 L = *lum; lum += 2; |
|
686 value = (rgb_2_pix[ L + cr_r ] | |
|
687 rgb_2_pix[ L + crb_g ] | |
|
688 rgb_2_pix[ L + cb_b ]); |
|
689 *row++ = (value ) & 0xFF; |
|
690 *row++ = (value >> 8) & 0xFF; |
|
691 *row++ = (value >> 16) & 0xFF; |
|
692 |
|
693 L = *lum; lum += 2; |
|
694 value = (rgb_2_pix[ L + cr_r ] | |
|
695 rgb_2_pix[ L + crb_g ] | |
|
696 rgb_2_pix[ L + cb_b ]); |
|
697 *row++ = (value ) & 0xFF; |
|
698 *row++ = (value >> 8) & 0xFF; |
|
699 *row++ = (value >> 16) & 0xFF; |
|
700 |
|
701 } |
|
702 row += mod; |
|
703 } |
|
704 } |
|
705 |
|
706 static void Color32DitherYUY2Mod1X( int *colortab, Uint32 *rgb_2_pix, |
|
707 unsigned char *lum, unsigned char *cr, |
|
708 unsigned char *cb, unsigned char *out, |
|
709 int rows, int cols, int mod ) |
|
710 { |
|
711 unsigned int* row; |
|
712 int x, y; |
|
713 int cr_r; |
|
714 int crb_g; |
|
715 int cb_b; |
|
716 int cols_2 = cols / 2; |
|
717 |
|
718 row = (unsigned int*) out; |
|
719 y = rows; |
|
720 while( y-- ) |
|
721 { |
|
722 x = cols_2; |
|
723 while( x-- ) |
|
724 { |
|
725 register int L; |
|
726 |
|
727 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
728 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
729 + colortab[ *cb + 2*256 ]; |
|
730 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
731 cr += 4; cb += 4; |
|
732 |
|
733 L = *lum; lum += 2; |
|
734 *row++ = (rgb_2_pix[ L + cr_r ] | |
|
735 rgb_2_pix[ L + crb_g ] | |
|
736 rgb_2_pix[ L + cb_b ]); |
|
737 |
|
738 L = *lum; lum += 2; |
|
739 *row++ = (rgb_2_pix[ L + cr_r ] | |
|
740 rgb_2_pix[ L + crb_g ] | |
|
741 rgb_2_pix[ L + cb_b ]); |
|
742 |
|
743 |
|
744 } |
|
745 row += mod; |
|
746 } |
|
747 } |
|
748 |
|
749 /* |
|
750 * In this function I make use of a nasty trick. The tables have the lower |
|
751 * 16 bits replicated in the upper 16. This means I can write ints and get |
|
752 * the horisontal doubling for free (almost). |
|
753 */ |
|
754 static void Color16DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
|
755 unsigned char *lum, unsigned char *cr, |
|
756 unsigned char *cb, unsigned char *out, |
|
757 int rows, int cols, int mod ) |
|
758 { |
|
759 unsigned int* row = (unsigned int*) out; |
|
760 const int next_row = cols+(mod/2); |
|
761 int x, y; |
|
762 int cr_r; |
|
763 int crb_g; |
|
764 int cb_b; |
|
765 int cols_2 = cols / 2; |
|
766 |
|
767 y = rows; |
|
768 while( y-- ) |
|
769 { |
|
770 x = cols_2; |
|
771 while( x-- ) |
|
772 { |
|
773 register int L; |
|
774 |
|
775 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
776 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
777 + colortab[ *cb + 2*256 ]; |
|
778 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
779 cr += 4; cb += 4; |
|
780 |
|
781 L = *lum; lum += 2; |
|
782 row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] | |
|
783 rgb_2_pix[ L + crb_g ] | |
|
784 rgb_2_pix[ L + cb_b ]); |
|
785 row++; |
|
786 |
|
787 L = *lum; lum += 2; |
|
788 row[0] = row[next_row] = (rgb_2_pix[ L + cr_r ] | |
|
789 rgb_2_pix[ L + crb_g ] | |
|
790 rgb_2_pix[ L + cb_b ]); |
|
791 row++; |
|
792 |
|
793 } |
|
794 row += next_row; |
|
795 } |
|
796 } |
|
797 |
|
798 static void Color24DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
|
799 unsigned char *lum, unsigned char *cr, |
|
800 unsigned char *cb, unsigned char *out, |
|
801 int rows, int cols, int mod ) |
|
802 { |
|
803 unsigned int value; |
|
804 unsigned char* row = out; |
|
805 const int next_row = (cols*2 + mod) * 3; |
|
806 int x, y; |
|
807 int cr_r; |
|
808 int crb_g; |
|
809 int cb_b; |
|
810 int cols_2 = cols / 2; |
|
811 y = rows; |
|
812 while( y-- ) |
|
813 { |
|
814 x = cols_2; |
|
815 while( x-- ) |
|
816 { |
|
817 register int L; |
|
818 |
|
819 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
820 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
821 + colortab[ *cb + 2*256 ]; |
|
822 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
823 cr += 4; cb += 4; |
|
824 |
|
825 L = *lum; lum += 2; |
|
826 value = (rgb_2_pix[ L + cr_r ] | |
|
827 rgb_2_pix[ L + crb_g ] | |
|
828 rgb_2_pix[ L + cb_b ]); |
|
829 row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] = |
|
830 (value ) & 0xFF; |
|
831 row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] = |
|
832 (value >> 8) & 0xFF; |
|
833 row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] = |
|
834 (value >> 16) & 0xFF; |
|
835 row += 2*3; |
|
836 |
|
837 L = *lum; lum += 2; |
|
838 value = (rgb_2_pix[ L + cr_r ] | |
|
839 rgb_2_pix[ L + crb_g ] | |
|
840 rgb_2_pix[ L + cb_b ]); |
|
841 row[0+0] = row[3+0] = row[next_row+0] = row[next_row+3+0] = |
|
842 (value ) & 0xFF; |
|
843 row[0+1] = row[3+1] = row[next_row+1] = row[next_row+3+1] = |
|
844 (value >> 8) & 0xFF; |
|
845 row[0+2] = row[3+2] = row[next_row+2] = row[next_row+3+2] = |
|
846 (value >> 16) & 0xFF; |
|
847 row += 2*3; |
|
848 |
|
849 } |
|
850 row += next_row; |
|
851 } |
|
852 } |
|
853 |
|
854 static void Color32DitherYUY2Mod2X( int *colortab, Uint32 *rgb_2_pix, |
|
855 unsigned char *lum, unsigned char *cr, |
|
856 unsigned char *cb, unsigned char *out, |
|
857 int rows, int cols, int mod ) |
|
858 { |
|
859 unsigned int* row = (unsigned int*) out; |
|
860 const int next_row = cols*2+mod; |
|
861 int x, y; |
|
862 int cr_r; |
|
863 int crb_g; |
|
864 int cb_b; |
|
865 int cols_2 = cols / 2; |
|
866 mod+=mod; |
|
867 y = rows; |
|
868 while( y-- ) |
|
869 { |
|
870 x = cols_2; |
|
871 while( x-- ) |
|
872 { |
|
873 register int L; |
|
874 |
|
875 cr_r = 0*768+256 + colortab[ *cr + 0*256 ]; |
|
876 crb_g = 1*768+256 + colortab[ *cr + 1*256 ] |
|
877 + colortab[ *cb + 2*256 ]; |
|
878 cb_b = 2*768+256 + colortab[ *cb + 3*256 ]; |
|
879 cr += 4; cb += 4; |
|
880 |
|
881 L = *lum; lum += 2; |
|
882 row[0] = row[1] = row[next_row] = row[next_row+1] = |
|
883 (rgb_2_pix[ L + cr_r ] | |
|
884 rgb_2_pix[ L + crb_g ] | |
|
885 rgb_2_pix[ L + cb_b ]); |
|
886 row += 2; |
|
887 |
|
888 L = *lum; lum += 2; |
|
889 row[0] = row[1] = row[next_row] = row[next_row+1] = |
|
890 (rgb_2_pix[ L + cr_r ] | |
|
891 rgb_2_pix[ L + crb_g ] | |
|
892 rgb_2_pix[ L + cb_b ]); |
|
893 row += 2; |
|
894 |
|
895 |
|
896 } |
|
897 |
|
898 row += next_row; |
|
899 } |
|
900 } |
|
901 |
|
902 /* |
|
903 * How many 1 bits are there in the Uint32. |
|
904 * Low performance, do not call often. |
|
905 */ |
|
906 static int number_of_bits_set( Uint32 a ) |
|
907 { |
|
908 if(!a) return 0; |
|
909 if(a & 1) return 1 + number_of_bits_set(a >> 1); |
|
910 return(number_of_bits_set(a >> 1)); |
|
911 } |
|
912 |
|
913 /* |
|
914 * How many 0 bits are there at least significant end of Uint32. |
|
915 * Low performance, do not call often. |
|
916 */ |
|
917 static int free_bits_at_bottom( Uint32 a ) |
|
918 { |
|
919 /* assume char is 8 bits */ |
|
920 if(!a) return sizeof(Uint32) * 8; |
|
921 if(((Sint32)a) & 1l) return 0; |
|
922 return 1 + free_bits_at_bottom ( a >> 1); |
|
923 } |
|
924 |
|
925 |
|
926 SDL_Overlay *SDL_CreateYUV_SW(_THIS, int width, int height, Uint32 format, SDL_Surface *display) |
|
927 { |
|
928 SDL_Overlay *overlay; |
|
929 struct private_yuvhwdata *swdata; |
|
930 int *Cr_r_tab; |
|
931 int *Cr_g_tab; |
|
932 int *Cb_g_tab; |
|
933 int *Cb_b_tab; |
|
934 Uint32 *r_2_pix_alloc; |
|
935 Uint32 *g_2_pix_alloc; |
|
936 Uint32 *b_2_pix_alloc; |
|
937 int i; |
|
938 int CR, CB; |
|
939 Uint32 Rmask, Gmask, Bmask; |
|
940 |
|
941 /* Only RGB packed pixel conversion supported */ |
|
942 if ( (display->format->BytesPerPixel != 2) && |
|
943 (display->format->BytesPerPixel != 3) && |
|
944 (display->format->BytesPerPixel != 4) ) { |
|
945 SDL_SetError("Can't use YUV data on non 16/24/32 bit surfaces"); |
|
946 return(NULL); |
|
947 } |
|
948 |
|
949 /* Verify that we support the format */ |
|
950 switch (format) { |
|
951 case SDL_YV12_OVERLAY: |
|
952 case SDL_IYUV_OVERLAY: |
|
953 case SDL_YUY2_OVERLAY: |
|
954 case SDL_UYVY_OVERLAY: |
|
955 case SDL_YVYU_OVERLAY: |
|
956 break; |
|
957 default: |
|
958 SDL_SetError("Unsupported YUV format"); |
|
959 return(NULL); |
|
960 } |
|
961 |
|
962 /* Create the overlay structure */ |
|
963 overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay); |
|
964 if ( overlay == NULL ) { |
|
965 SDL_OutOfMemory(); |
|
966 return(NULL); |
|
967 } |
|
968 SDL_memset(overlay, 0, (sizeof *overlay)); |
|
969 |
|
970 /* Fill in the basic members */ |
|
971 overlay->format = format; |
|
972 overlay->w = width; |
|
973 overlay->h = height; |
|
974 |
|
975 /* Set up the YUV surface function structure */ |
|
976 overlay->hwfuncs = &sw_yuvfuncs; |
|
977 |
|
978 /* Create the pixel data and lookup tables */ |
|
979 swdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *swdata); |
|
980 overlay->hwdata = swdata; |
|
981 if ( swdata == NULL ) { |
|
982 SDL_OutOfMemory(); |
|
983 SDL_FreeYUVOverlay(overlay); |
|
984 return(NULL); |
|
985 } |
|
986 swdata->stretch = NULL; |
|
987 swdata->display = display; |
|
988 swdata->pixels = (Uint8 *) SDL_malloc(width*height*2); |
|
989 swdata->colortab = (int *)SDL_malloc(4*256*sizeof(int)); |
|
990 Cr_r_tab = &swdata->colortab[0*256]; |
|
991 Cr_g_tab = &swdata->colortab[1*256]; |
|
992 Cb_g_tab = &swdata->colortab[2*256]; |
|
993 Cb_b_tab = &swdata->colortab[3*256]; |
|
994 swdata->rgb_2_pix = (Uint32 *)SDL_malloc(3*768*sizeof(Uint32)); |
|
995 r_2_pix_alloc = &swdata->rgb_2_pix[0*768]; |
|
996 g_2_pix_alloc = &swdata->rgb_2_pix[1*768]; |
|
997 b_2_pix_alloc = &swdata->rgb_2_pix[2*768]; |
|
998 if ( ! swdata->pixels || ! swdata->colortab || ! swdata->rgb_2_pix ) { |
|
999 SDL_OutOfMemory(); |
|
1000 SDL_FreeYUVOverlay(overlay); |
|
1001 return(NULL); |
|
1002 } |
|
1003 |
|
1004 /* Generate the tables for the display surface */ |
|
1005 for (i=0; i<256; i++) { |
|
1006 /* Gamma correction (luminescence table) and chroma correction |
|
1007 would be done here. See the Berkeley mpeg_play sources. |
|
1008 */ |
|
1009 CB = CR = (i-128); |
|
1010 Cr_r_tab[i] = (int) ( (0.419/0.299) * CR); |
|
1011 Cr_g_tab[i] = (int) (-(0.299/0.419) * CR); |
|
1012 Cb_g_tab[i] = (int) (-(0.114/0.331) * CB); |
|
1013 Cb_b_tab[i] = (int) ( (0.587/0.331) * CB); |
|
1014 } |
|
1015 |
|
1016 /* |
|
1017 * Set up entries 0-255 in rgb-to-pixel value tables. |
|
1018 */ |
|
1019 Rmask = display->format->Rmask; |
|
1020 Gmask = display->format->Gmask; |
|
1021 Bmask = display->format->Bmask; |
|
1022 for ( i=0; i<256; ++i ) { |
|
1023 r_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Rmask)); |
|
1024 r_2_pix_alloc[i+256] <<= free_bits_at_bottom(Rmask); |
|
1025 g_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Gmask)); |
|
1026 g_2_pix_alloc[i+256] <<= free_bits_at_bottom(Gmask); |
|
1027 b_2_pix_alloc[i+256] = i >> (8 - number_of_bits_set(Bmask)); |
|
1028 b_2_pix_alloc[i+256] <<= free_bits_at_bottom(Bmask); |
|
1029 } |
|
1030 |
|
1031 /* |
|
1032 * If we have 16-bit output depth, then we double the value |
|
1033 * in the top word. This means that we can write out both |
|
1034 * pixels in the pixel doubling mode with one op. It is |
|
1035 * harmless in the normal case as storing a 32-bit value |
|
1036 * through a short pointer will lose the top bits anyway. |
|
1037 */ |
|
1038 if( display->format->BytesPerPixel == 2 ) { |
|
1039 for ( i=0; i<256; ++i ) { |
|
1040 r_2_pix_alloc[i+256] |= (r_2_pix_alloc[i+256]) << 16; |
|
1041 g_2_pix_alloc[i+256] |= (g_2_pix_alloc[i+256]) << 16; |
|
1042 b_2_pix_alloc[i+256] |= (b_2_pix_alloc[i+256]) << 16; |
|
1043 } |
|
1044 } |
|
1045 |
|
1046 /* |
|
1047 * Spread out the values we have to the rest of the array so that |
|
1048 * we do not need to check for overflow. |
|
1049 */ |
|
1050 for ( i=0; i<256; ++i ) { |
|
1051 r_2_pix_alloc[i] = r_2_pix_alloc[256]; |
|
1052 r_2_pix_alloc[i+512] = r_2_pix_alloc[511]; |
|
1053 g_2_pix_alloc[i] = g_2_pix_alloc[256]; |
|
1054 g_2_pix_alloc[i+512] = g_2_pix_alloc[511]; |
|
1055 b_2_pix_alloc[i] = b_2_pix_alloc[256]; |
|
1056 b_2_pix_alloc[i+512] = b_2_pix_alloc[511]; |
|
1057 } |
|
1058 |
|
1059 /* You have chosen wisely... */ |
|
1060 switch (format) { |
|
1061 case SDL_YV12_OVERLAY: |
|
1062 case SDL_IYUV_OVERLAY: |
|
1063 if ( display->format->BytesPerPixel == 2 ) { |
|
1064 #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
|
1065 /* inline assembly functions */ |
|
1066 if ( SDL_HasMMX() && (Rmask == 0xF800) && |
|
1067 (Gmask == 0x07E0) && |
|
1068 (Bmask == 0x001F) && |
|
1069 (width & 15) == 0) { |
|
1070 /*printf("Using MMX 16-bit 565 dither\n");*/ |
|
1071 swdata->Display1X = Color565DitherYV12MMX1X; |
|
1072 } else { |
|
1073 /*printf("Using C 16-bit dither\n");*/ |
|
1074 swdata->Display1X = Color16DitherYV12Mod1X; |
|
1075 } |
|
1076 #else |
|
1077 swdata->Display1X = Color16DitherYV12Mod1X; |
|
1078 #endif |
|
1079 swdata->Display2X = Color16DitherYV12Mod2X; |
|
1080 } |
|
1081 if ( display->format->BytesPerPixel == 3 ) { |
|
1082 swdata->Display1X = Color24DitherYV12Mod1X; |
|
1083 swdata->Display2X = Color24DitherYV12Mod2X; |
|
1084 } |
|
1085 if ( display->format->BytesPerPixel == 4 ) { |
|
1086 #if (__GNUC__ > 2) && defined(__i386__) && __OPTIMIZE__ && SDL_ASSEMBLY_ROUTINES |
|
1087 /* inline assembly functions */ |
|
1088 if ( SDL_HasMMX() && (Rmask == 0x00FF0000) && |
|
1089 (Gmask == 0x0000FF00) && |
|
1090 (Bmask == 0x000000FF) && |
|
1091 (width & 15) == 0) { |
|
1092 /*printf("Using MMX 32-bit dither\n");*/ |
|
1093 swdata->Display1X = ColorRGBDitherYV12MMX1X; |
|
1094 } else { |
|
1095 /*printf("Using C 32-bit dither\n");*/ |
|
1096 swdata->Display1X = Color32DitherYV12Mod1X; |
|
1097 } |
|
1098 #else |
|
1099 swdata->Display1X = Color32DitherYV12Mod1X; |
|
1100 #endif |
|
1101 swdata->Display2X = Color32DitherYV12Mod2X; |
|
1102 } |
|
1103 break; |
|
1104 case SDL_YUY2_OVERLAY: |
|
1105 case SDL_UYVY_OVERLAY: |
|
1106 case SDL_YVYU_OVERLAY: |
|
1107 if ( display->format->BytesPerPixel == 2 ) { |
|
1108 swdata->Display1X = Color16DitherYUY2Mod1X; |
|
1109 swdata->Display2X = Color16DitherYUY2Mod2X; |
|
1110 } |
|
1111 if ( display->format->BytesPerPixel == 3 ) { |
|
1112 swdata->Display1X = Color24DitherYUY2Mod1X; |
|
1113 swdata->Display2X = Color24DitherYUY2Mod2X; |
|
1114 } |
|
1115 if ( display->format->BytesPerPixel == 4 ) { |
|
1116 swdata->Display1X = Color32DitherYUY2Mod1X; |
|
1117 swdata->Display2X = Color32DitherYUY2Mod2X; |
|
1118 } |
|
1119 break; |
|
1120 default: |
|
1121 /* We should never get here (caught above) */ |
|
1122 break; |
|
1123 } |
|
1124 |
|
1125 /* Find the pitch and offset values for the overlay */ |
|
1126 overlay->pitches = swdata->pitches; |
|
1127 overlay->pixels = swdata->planes; |
|
1128 switch (format) { |
|
1129 case SDL_YV12_OVERLAY: |
|
1130 case SDL_IYUV_OVERLAY: |
|
1131 overlay->pitches[0] = overlay->w; |
|
1132 overlay->pitches[1] = overlay->pitches[0] / 2; |
|
1133 overlay->pitches[2] = overlay->pitches[0] / 2; |
|
1134 overlay->pixels[0] = swdata->pixels; |
|
1135 overlay->pixels[1] = overlay->pixels[0] + |
|
1136 overlay->pitches[0] * overlay->h; |
|
1137 overlay->pixels[2] = overlay->pixels[1] + |
|
1138 overlay->pitches[1] * overlay->h / 2; |
|
1139 overlay->planes = 3; |
|
1140 break; |
|
1141 case SDL_YUY2_OVERLAY: |
|
1142 case SDL_UYVY_OVERLAY: |
|
1143 case SDL_YVYU_OVERLAY: |
|
1144 overlay->pitches[0] = overlay->w*2; |
|
1145 overlay->pixels[0] = swdata->pixels; |
|
1146 overlay->planes = 1; |
|
1147 break; |
|
1148 default: |
|
1149 /* We should never get here (caught above) */ |
|
1150 break; |
|
1151 } |
|
1152 |
|
1153 /* We're all done.. */ |
|
1154 return(overlay); |
|
1155 } |
|
1156 |
|
1157 int SDL_LockYUV_SW(_THIS, SDL_Overlay *overlay) |
|
1158 { |
|
1159 return(0); |
|
1160 } |
|
1161 |
|
1162 void SDL_UnlockYUV_SW(_THIS, SDL_Overlay *overlay) |
|
1163 { |
|
1164 return; |
|
1165 } |
|
1166 |
|
1167 int SDL_DisplayYUV_SW(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst) |
|
1168 { |
|
1169 struct private_yuvhwdata *swdata; |
|
1170 int stretch; |
|
1171 int scale_2x; |
|
1172 SDL_Surface *display; |
|
1173 Uint8 *lum, *Cr, *Cb; |
|
1174 Uint8 *dstp; |
|
1175 int mod; |
|
1176 |
|
1177 swdata = overlay->hwdata; |
|
1178 stretch = 0; |
|
1179 scale_2x = 0; |
|
1180 if ( src->x || src->y || src->w < overlay->w || src->h < overlay->h ) { |
|
1181 /* The source rectangle has been clipped. |
|
1182 Using a scratch surface is easier than adding clipped |
|
1183 source support to all the blitters, plus that would |
|
1184 slow them down in the general unclipped case. |
|
1185 */ |
|
1186 stretch = 1; |
|
1187 } else if ( (src->w != dst->w) || (src->h != dst->h) ) { |
|
1188 if ( (dst->w == 2*src->w) && |
|
1189 (dst->h == 2*src->h) ) { |
|
1190 scale_2x = 1; |
|
1191 } else { |
|
1192 stretch = 1; |
|
1193 } |
|
1194 } |
|
1195 if ( stretch ) { |
|
1196 if ( ! swdata->stretch ) { |
|
1197 display = swdata->display; |
|
1198 swdata->stretch = SDL_CreateRGBSurface( |
|
1199 SDL_SWSURFACE, |
|
1200 overlay->w, overlay->h, |
|
1201 display->format->BitsPerPixel, |
|
1202 display->format->Rmask, |
|
1203 display->format->Gmask, |
|
1204 display->format->Bmask, 0); |
|
1205 if ( ! swdata->stretch ) { |
|
1206 return(-1); |
|
1207 } |
|
1208 } |
|
1209 display = swdata->stretch; |
|
1210 } else { |
|
1211 display = swdata->display; |
|
1212 } |
|
1213 switch (overlay->format) { |
|
1214 case SDL_YV12_OVERLAY: |
|
1215 lum = overlay->pixels[0]; |
|
1216 Cr = overlay->pixels[1]; |
|
1217 Cb = overlay->pixels[2]; |
|
1218 break; |
|
1219 case SDL_IYUV_OVERLAY: |
|
1220 lum = overlay->pixels[0]; |
|
1221 Cr = overlay->pixels[2]; |
|
1222 Cb = overlay->pixels[1]; |
|
1223 break; |
|
1224 case SDL_YUY2_OVERLAY: |
|
1225 lum = overlay->pixels[0]; |
|
1226 Cr = lum + 3; |
|
1227 Cb = lum + 1; |
|
1228 break; |
|
1229 case SDL_UYVY_OVERLAY: |
|
1230 lum = overlay->pixels[0]+1; |
|
1231 Cr = lum + 1; |
|
1232 Cb = lum - 1; |
|
1233 break; |
|
1234 case SDL_YVYU_OVERLAY: |
|
1235 lum = overlay->pixels[0]; |
|
1236 Cr = lum + 1; |
|
1237 Cb = lum + 3; |
|
1238 break; |
|
1239 default: |
|
1240 SDL_SetError("Unsupported YUV format in blit"); |
|
1241 return(-1); |
|
1242 } |
|
1243 if ( SDL_MUSTLOCK(display) ) { |
|
1244 if ( SDL_LockSurface(display) < 0 ) { |
|
1245 return(-1); |
|
1246 } |
|
1247 } |
|
1248 if ( stretch ) { |
|
1249 dstp = (Uint8 *)swdata->stretch->pixels; |
|
1250 } else { |
|
1251 dstp = (Uint8 *)display->pixels |
|
1252 + dst->x * display->format->BytesPerPixel |
|
1253 + dst->y * display->pitch; |
|
1254 } |
|
1255 mod = (display->pitch / display->format->BytesPerPixel); |
|
1256 |
|
1257 if ( scale_2x ) { |
|
1258 mod -= (overlay->w * 2); |
|
1259 swdata->Display2X(swdata->colortab, swdata->rgb_2_pix, |
|
1260 lum, Cr, Cb, dstp, overlay->h, overlay->w, mod); |
|
1261 } else { |
|
1262 mod -= overlay->w; |
|
1263 swdata->Display1X(swdata->colortab, swdata->rgb_2_pix, |
|
1264 lum, Cr, Cb, dstp, overlay->h, overlay->w, mod); |
|
1265 } |
|
1266 if ( SDL_MUSTLOCK(display) ) { |
|
1267 SDL_UnlockSurface(display); |
|
1268 } |
|
1269 if ( stretch ) { |
|
1270 display = swdata->display; |
|
1271 SDL_SoftStretch(swdata->stretch, src, display, dst); |
|
1272 } |
|
1273 SDL_UpdateRects(display, 1, dst); |
|
1274 |
|
1275 return(0); |
|
1276 } |
|
1277 |
|
1278 void SDL_FreeYUV_SW(_THIS, SDL_Overlay *overlay) |
|
1279 { |
|
1280 struct private_yuvhwdata *swdata; |
|
1281 |
|
1282 swdata = overlay->hwdata; |
|
1283 if ( swdata ) { |
|
1284 if ( swdata->stretch ) { |
|
1285 SDL_FreeSurface(swdata->stretch); |
|
1286 } |
|
1287 if ( swdata->pixels ) { |
|
1288 SDL_free(swdata->pixels); |
|
1289 } |
|
1290 if ( swdata->colortab ) { |
|
1291 SDL_free(swdata->colortab); |
|
1292 } |
|
1293 if ( swdata->rgb_2_pix ) { |
|
1294 SDL_free(swdata->rgb_2_pix); |
|
1295 } |
|
1296 SDL_free(swdata); |
|
1297 } |
|
1298 } |