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annotate src/video/nanox/SDL_nximage.c @ 150:df1d68818edb

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author Sam Lantinga <slouken@libsdl.org>
date Sat, 18 Aug 2001 10:33:55 +0000
parents 57bf11a5efd7
children e8157fcb3114
rev   line source
30
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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 Sam Lantinga
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4 Copyright (C) 2001 Hsieh-Fu Tsai
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5
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6 This library is free software; you can redistribute it and/or
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7 modify it under the terms of the GNU Library General Public
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8 License as published by the Free Software Foundation; either
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9 version 2 of the License, or (at your option) any later version.
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10
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11 This library is distributed in the hope that it will be useful,
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12 but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 Library General Public License for more details.
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15
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16 You should have received a copy of the GNU Library General Public
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17 License along with this library; if not, write to the Free
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18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19
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20 Sam Lantinga
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21 slouken@devolution.com
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22
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23 Hsieh-Fu Tsai
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24 clare@setabox.com
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25 */
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26
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27 #include <stdlib.h>
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28
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29 #include "SDL_error.h"
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30
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31 #include "SDL_nximage_c.h"
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32
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33 void NX_NormalUpdate (_THIS, int numrects, SDL_Rect * rects)
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34 {
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35 int i, j, xinc, yinc, destinc ;
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36 int x, y, w, h ;
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37 unsigned char * src = NULL, * dest = NULL ;
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38
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39 Dprintf ("enter NX_NormalUpdate\n") ;
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40
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41 xinc = this -> screen -> format -> BytesPerPixel ;
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42 yinc = this -> screen -> pitch ;
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43
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44 for (i = 0; i < numrects; ++ i) {
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45 x = rects [i].x, y = rects [i].y ;
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46 w = rects [i].w, h = rects [i].h ;
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47 src = SDL_Image + y * yinc + x * xinc ;
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48 dest = Image_buff ;
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49 destinc = w * xinc ;
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50
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51 // apply GammaRamp table
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52 #if (defined (NANOX_PIXEL_RGB) || defined (NANOX_PIXEL_0888) || \
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53 defined (NANOX_PIXEL_888))
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54 if (GammaRamp_R && GammaRamp_G && GammaRamp_B) {
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55 Uint8 * ptr ;
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56 int k ;
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57
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58 for (j = h; j > 0; -- j, src += yinc) {
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59 ptr = src - 1 ;
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60 for (k = w; k > 0; -- k) {
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61 #ifdef NANOX_PIXEL_RGB
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62 ptr += 2 ;
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63 #endif
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64 #ifdef NANOX_PIXEL_0888
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65 ptr += 2 ;
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66 #endif
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67 #ifdef NANOX_PIXEL_888
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68 ++ ptr ;
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69 #endif
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70 (* ptr) = GammaRamp_B [(* ptr)] ;
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71 ++ ptr ;
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72 (* ptr) = GammaRamp_G [(* ptr)] ;
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73 ++ ptr ;
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74 (* ptr) = GammaRamp_R [(* ptr)] ;
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75 }
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76 }
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77 src = SDL_Image + y * yinc + x * xinc ;
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78 }
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79 #endif // apply Gamma table
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80
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81 for (j = h; j > 0; -- j, src += yinc, dest += destinc) {
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82 memcpy (dest, src, destinc) ;
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83 }
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84
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85 if (currently_fullscreen) {
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86 GrArea (FSwindow, SDL_GC, x + OffsetX, y + OffsetY, w, h, Image_buff,
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87 pixel_type) ;
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88 } else {
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89 GrArea (SDL_Window, SDL_GC, x, y, w, h, Image_buff, pixel_type) ;
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90 }
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91 }
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92
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93 Dprintf ("leave NX_NormalUpdate\n") ;
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94 }
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95
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96 int NX_SetupImage (_THIS, SDL_Surface * screen)
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97 {
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98 int size = screen -> h * screen -> pitch ;
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99
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100 Dprintf ("enter NX_SetupImage\n") ;
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101
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102 screen -> pixels = (void *) malloc (size) ;
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103 Image_buff = (unsigned char *) malloc (size) ;
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104 if (screen -> pixels == NULL || Image_buff == NULL) {
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105 free (screen -> pixels) ;
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106 free (Image_buff) ;
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107 SDL_OutOfMemory () ;
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108 return -1 ;
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109 }
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110
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111 SDL_Image = (unsigned char *) screen -> pixels ;
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112
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113 this -> UpdateRects = NX_NormalUpdate ;
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114
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115 Dprintf ("leave NX_SetupImage\n") ;
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116 return 0 ;
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117 }
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118
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119 void NX_DestroyImage (_THIS, SDL_Surface * screen)
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120 {
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121 Dprintf ("enter NX_DestroyImage\n") ;
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122
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123 if (SDL_Image) free (SDL_Image) ;
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124 if (Image_buff) free (Image_buff) ;
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125 if (screen) screen -> pixels = NULL ;
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126
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127 Dprintf ("leave NX_DestroyImage\n") ;
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128 }
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129
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130 int NX_ResizeImage (_THIS, SDL_Surface * screen, Uint32 flags)
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131 {
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132 int retval ;
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133 GR_SCREEN_INFO si ;
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134
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135 Dprintf ("enter NX_ResizeImage\n") ;
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136
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137 NX_DestroyImage (this, screen) ;
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138 retval = NX_SetupImage (this, screen) ;
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139
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140 GrGetScreenInfo (& si) ;
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141 OffsetX = (si.cols - screen -> w) / 2 ;
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142 OffsetY = (si.rows - screen -> h) / 2 ;
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143
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144 Dprintf ("leave NX_ResizeImage\n") ;
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145 return retval ;
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146 }
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147
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148 void NX_RefreshDisplay (_THIS)
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149 {
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150 Dprintf ("enter NX_RefreshDisplay\n") ;
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151
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152 // Don't refresh a display that doesn't have an image (like GL)
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153 if (! SDL_Image) {
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154 return;
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155 }
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156
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157 if (currently_fullscreen) {
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158 GrArea (FSwindow, SDL_GC, OffsetX, OffsetY, this -> screen -> w,
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159 this -> screen -> h, SDL_Image, pixel_type) ;
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160 } else {
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161 GrArea (SDL_Window, SDL_GC, 0, 0, this -> screen -> w,
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162 this -> screen -> h, SDL_Image, pixel_type) ;
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163 }
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164
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165 Dprintf ("leave NX_RefreshDisplay\n") ;
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166 }