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nuclear@3
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1 #include <stdio.h>
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2 #include <SDL/SDL.h>
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3 #include "gfx.h"
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4 #include "image.h"
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5
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6 static SDL_Surface *fbsurf;
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7 static int scr_width, scr_height;
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8 static int fb_width, fb_height;
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9 static int num_bitplanes;
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10 static int init_flags;
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11
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12
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13 int gfx_init(int nbpl, unsigned int flags)
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14 {
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15 init_flags = flags;
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16 num_bitplanes = nbpl;
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17 scr_width = fb_width = (flags & GFX_HIRES) ? 640 : 320;
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18 scr_height = fb_height = (flags & GFX_ILACE) ? 512 : 256;
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19
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20 if(SDL_Init(SDL_INIT_VIDEO) == -1) {
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21 fprintf(stderr, "failed to initialize SDL\n");
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22 return -1;
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23 }
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24 if(!(fbsurf = SDL_SetVideoMode(scr_width, scr_height, 32, SDL_SWSURFACE))) {
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25 fprintf(stderr, "failed to set video mode %dx%d\n", scr_width, scr_height);
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26 SDL_Quit();
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27 return -1;
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28 }
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29 SDL_WM_SetCaption("imgv SDL version", 0);
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30
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31 return 0;
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32 }
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33
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34 void gfx_shutdown(void)
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35 {
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36 SDL_Quit();
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37 }
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38
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39
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40 int gfx_screen_width(void)
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41 {
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42 return scr_width;
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43 }
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44
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45 int gfx_screen_height(void)
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46 {
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47 return scr_height;
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48 }
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49
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50
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51 void *gfx_set_framebuffer(void *fb, int width, int height)
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52 {
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53 return 0;
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54 }
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55
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56 void *gfx_get_framebuffer(void)
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57 {
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58 return 0;
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59 }
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60
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61
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62 int get_framebuffer_width(void)
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63 {
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64 return fb_width;
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65 }
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66
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67 int get_framebuffer_height(void)
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68 {
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69 return fb_height;
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70 }
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71
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72
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73 void gfx_begin_copperlist(void)
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74 {
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75 }
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76
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77
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78 int gfx_next_event(union gfx_event *ev, int block)
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79 {
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80 SDL_Event sdlev;
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81
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82 if(block) {
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83 SDL_WaitEvent(&sdlev);
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84 } else {
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85 if(!SDL_PollEvent(&sdlev)) {
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86 return 0;
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87 }
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88 }
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89
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90 switch(sdlev.type) {
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91 case SDL_QUIT:
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92 ev->type = GFX_EV_QUIT;
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93 return 1;
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94
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95 case SDL_KEYDOWN:
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96 case SDL_KEYUP:
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97 ev->type = GFX_EV_KEY;
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98 ev->key.key = sdlev.key.keysym.sym;
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99 ev->key.pressed = sdlev.key.state == SDL_PRESSED;
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100 return 1;
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101
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102 default:
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103 break;
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104 }
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105 return 0;
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106 }
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107
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108
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109 void gfx_wait_vpos(int x)
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110 {
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111 }
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112
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113 void gfx_wait_vblank(void)
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114 {
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115 }
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116
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117 #define ARED(x) ((((x) & 0xf00) >> 4) | (((x) & 0xf00) >> 8))
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118 #define AGREEN(x) (((x) & 0xf0) | (((x) & 0xf0) >> 4))
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119 #define ABLUE(x) ((((x) & 0xf) << 4) | ((x) & 0xf))
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120
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121 #define RSHIFT (fbsurf->format->Rshift)
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122 #define GSHIFT (fbsurf->format->Gshift)
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123 #define BSHIFT (fbsurf->format->Bshift)
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124 #define RMASK (fbsurf->format->Rmask)
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125 #define GMASK (fbsurf->format->Gmask)
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126 #define BMASK (fbsurf->format->Bmask)
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127
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128 #define PACKRGB(r, g, b) ((((r) << RSHIFT) & RMASK) | \
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129 (((g) << GSHIFT) & GMASK) | \
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130 (((b) << BSHIFT) & BMASK))
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131
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132 void gfx_show_image(struct ham_image *img)
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133 {
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134 int i, j, k;
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135 uint32_t color, palette[16];
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136 uint32_t *dest;
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137 unsigned char *src;
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138 struct palchange *chg = img->chglist;
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139
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140 for(i=0; i<16; i++) {
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141 uint16_t pcol = img->palette[i];
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142 int red = ARED(pcol);
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143 int green = AGREEN(pcol);
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144 int blue = ABLUE(pcol);
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145 palette[i] = PACKRGB(red, green, blue);
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146 }
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147
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148 if(SDL_MUSTLOCK(fbsurf)) {
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149 SDL_LockSurface(fbsurf);
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150 }
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151
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152 dest = fbsurf->pixels;
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153 src = img->pixels;
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154 for(i=0; i<img->height; i++) {
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155 while(chg && chg->line <= i) {
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156 int idx = (chg->entry & 0xf000) >> 12;
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157 int red = ARED(chg->entry);
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158 int green = AGREEN(chg->entry);
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159 int blue = ABLUE(chg->entry);
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160 palette[idx] = PACKRGB(red, green, blue);
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161 chg = chg->next;
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162 }
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163
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164 for(j=0; j<img->width; j++) {
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165 unsigned char idx = 0;
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166 unsigned char ham = 0;
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167 int bit = 7 - (j & 7);
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168
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169 for(k=0; k<img->nbitplanes; k++) {
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170 idx |= (((*(src + k * img->width / 8) >> bit) & 1) << k);
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171 }
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172
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173 if(init_flags & GFX_HAM) {
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174 ham = (idx >> 4) & 3;
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175 }
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176
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177 switch(ham) {
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178 case 0:
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179 color = palette[idx];
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180 break;
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181 case 1:
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182 color = (color & ~BMASK) | (((uint32_t)ABLUE(idx)) << BSHIFT);
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183 break;
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184 case 2:
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185 color = (color & ~RMASK) | (((uint32_t)ABLUE(idx)) << RSHIFT);
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186 break;
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187 case 3:
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188 color = (color & ~GMASK) | (((uint32_t)ABLUE(idx)) << GSHIFT);
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189 }
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190
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191 *dest++ = color;
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192 if(!bit) {
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193 ++src;
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194 }
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195 }
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196 src += img->width / 8 * (img->nbitplanes - 1);
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197 }
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198
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199 if(SDL_MUSTLOCK(fbsurf)) {
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200 SDL_UnlockSurface(fbsurf);
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201 }
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202
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203 SDL_Flip(fbsurf);
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204 }
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