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annotate src/video/nanox/SDL_nximage.c @ 2609:eec0c81ede06 gsoc2008_force_feedback

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CONVERT now checks for overflows.
author Edgar Simo <bobbens@gmail.com>
date Tue, 05 Aug 2008 18:26:11 +0000
parents c121d94672cb
children 99210400e8b9
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 Sam Lantinga
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4 Copyright (C) 2001 Hsieh-Fu Tsai
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5 Copyright (C) 2002 Greg Haerr <greg@censoft.com>
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6
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7 This library is free software; you can redistribute it and/or
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8 modify it under the terms of the GNU Library General Public
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9 License as published by the Free Software Foundation; either
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10 version 2 of the License, or (at your option) any later version.
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11
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12 This library is distributed in the hope that it will be useful,
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13 but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 Library General Public License for more details.
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16
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17 You should have received a copy of the GNU Library General Public
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18 License along with this library; if not, write to the Free
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19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20
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21 Sam Lantinga
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22 slouken@libsdl.org
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23
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24 Hsieh-Fu Tsai
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25 clare@setabox.com
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26 */
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27 #include "SDL_config.h"
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28
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29 #include "SDL_nximage_c.h"
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30
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31 void
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32 NX_NormalUpdate(_THIS, int numrects, SDL_Rect * rects)
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33 {
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34 int i, j, xinc, yinc, destinc, rowinc;
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35 int x, y, w, h;
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36 unsigned char *src = NULL, *dest = NULL;
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37
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38 Dprintf("enter NX_NormalUpdate\n");
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39
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40 /* These are the values for the incoming image */
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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 #ifdef ENABLE_NANOX_DIRECT_FB
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49 if (Clientfb) {
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50 if (currently_fullscreen)
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51 dest =
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52 fbinfo.winpixels + (((y + OffsetY) * fbinfo.pitch) +
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53 ((x + OffsetX) * fbinfo.bytespp));
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54 else
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55 dest =
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56 fbinfo.winpixels + ((y * fbinfo.pitch) +
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57 (x * fbinfo.bytespp));
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58 destinc = fbinfo.pitch;
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59 } else
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60 #endif
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61 {
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62 dest = Image_buff;
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63 destinc = w * xinc;
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64 }
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65 rowinc = w * xinc;
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66
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67 // apply GammaRamp table
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68 if ((pixel_type == MWPF_TRUECOLOR0888
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69 || pixel_type == MWPF_TRUECOLOR888) && GammaRamp_R
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70 && GammaRamp_G && GammaRamp_B) {
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71 Uint8 *ptrsrc;
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72 Uint8 *ptrdst;
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73 int k;
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74
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75 for (j = h; j > 0; --j, src += yinc, dest += destinc) {
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76 ptrsrc = src;
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77 ptrdst = dest;
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78 for (k = w; k > 0; --k) {
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79 *ptrdst++ = GammaRamp_B[*ptrsrc++] >> 8;
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80 *ptrdst++ = GammaRamp_G[*ptrsrc++] >> 8;
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81 *ptrdst++ = GammaRamp_R[*ptrsrc++] >> 8;
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82 *ptrdst++ = 0;
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83 ++ptrsrc;
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84 }
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85 }
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86 }
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87 #if 1 /* This is needed for microwindows 0.90 or older */
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88 else if (pixel_type == MWPF_TRUECOLOR0888
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89 || pixel_type == MWPF_TRUECOLOR888) {
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90 Uint8 *ptrsrc;
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91 Uint8 *ptrdst;
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92 int k;
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93
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94 for (j = h; j > 0; --j, src += yinc, dest += destinc) {
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95 ptrsrc = src;
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96 ptrdst = dest;
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97 for (k = w; k > 0; --k) {
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98 *ptrdst++ = *ptrsrc++;
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99 *ptrdst++ = *ptrsrc++;
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100 *ptrdst++ = *ptrsrc++;
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101 *ptrdst++ = 0;
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102 ++ptrsrc;
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103 }
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104 }
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105 }
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106 #endif
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107 else {
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108 for (j = h; j > 0; --j, src += yinc, dest += destinc)
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109 SDL_memcpy(dest, src, rowinc);
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110 }
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111 if (!Clientfb) {
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112 if (currently_fullscreen) {
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113 GrArea(FSwindow, SDL_GC, x + OffsetX, y + OffsetY, w,
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114 h, Image_buff, pixel_type);
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115 } else {
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116 GrArea(SDL_Window, SDL_GC, x, y, w, h, Image_buff,
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117 pixel_type);
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118 }
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119 }
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120 }
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121 GrFlush();
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122
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123 Dprintf("leave NX_NormalUpdate\n");
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124 }
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125
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126 int
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127 NX_SetupImage(_THIS, SDL_Surface * screen)
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128 {
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129 int size = screen->h * screen->pitch;
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130
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131 Dprintf("enter NX_SetupImage\n");
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132
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133 screen->pixels = (void *) SDL_malloc(size);
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134
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135 if (!Clientfb) {
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136 Image_buff = (unsigned char *) SDL_malloc(size);
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137 if (screen->pixels == NULL || Image_buff == NULL) {
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138 SDL_free(screen->pixels);
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139 SDL_free(Image_buff);
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140 SDL_OutOfMemory();
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141 return -1;
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142 }
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143 }
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144
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145 SDL_Image = (unsigned char *) screen->pixels;
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146
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147 this->UpdateRects = NX_NormalUpdate;
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148
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149 Dprintf("leave NX_SetupImage\n");
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150 return 0;
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151 }
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152
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153 void
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154 NX_DestroyImage(_THIS, SDL_Surface * screen)
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155 {
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156 Dprintf("enter NX_DestroyImage\n");
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157
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158 if (SDL_Image)
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159 SDL_free(SDL_Image);
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160 if (Image_buff)
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161 SDL_free(Image_buff);
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162 if (screen)
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163 screen->pixels = NULL;
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164
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165 Dprintf("leave NX_DestroyImage\n");
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166 }
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167
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168 int
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169 NX_ResizeImage(_THIS, SDL_Surface * screen, Uint32 flags)
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170 {
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171 int retval;
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172 GR_SCREEN_INFO si;
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173
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174 Dprintf("enter NX_ResizeImage\n");
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175
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176 NX_DestroyImage(this, screen);
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177 retval = NX_SetupImage(this, screen);
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178
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179 GrGetScreenInfo(&si);
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180 OffsetX = (si.cols - screen->w) / 2;
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181 OffsetY = (si.rows - screen->h) / 2;
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182
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183 #ifdef ENABLE_NANOX_DIRECT_FB
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184 if (Clientfb) {
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185 /* Get current window position and fb pointer */
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186 if (currently_fullscreen)
471
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187 GrGetWindowFBInfo(FSwindow, &fbinfo);
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188 else
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189 GrGetWindowFBInfo(SDL_Window, &fbinfo);
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190 }
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191 #endif
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192 Dprintf("leave NX_ResizeImage\n");
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193 return retval;
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194 }
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195
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196 void
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197 NX_RefreshDisplay(_THIS)
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198 {
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199 Dprintf("enter NX_RefreshDisplay\n");
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200
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201 // Don't refresh a display that doesn't have an image (like GL)
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202 if (!SDL_Image) {
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203 return;
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204 }
471
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205 #ifdef ENABLE_NANOX_DIRECT_FB
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206 if (Clientfb) {
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207 int j;
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208 char *src, *dest = NULL;
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209 int xinc, yinc, rowinc;
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210
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211 GrGetWindowFBInfo(SDL_Window, &fbinfo);
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212
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213 xinc = this->screen->format->BytesPerPixel;
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214 yinc = this->screen->pitch;
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215
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216 src = SDL_Image;
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217 if (currently_fullscreen)
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218 dest = fbinfo.winpixels + ((OffsetY * fbinfo.pitch) +
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219 (OffsetX * fbinfo.bytespp));
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220 else
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221 dest = fbinfo.winpixels;
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222 rowinc = xinc * this->screen->w;
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223
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224 for (j = this->screen->h; j > 0;
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225 --j, src += yinc, dest += fbinfo.pitch)
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226 SDL_memcpy(dest, src, rowinc);
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227 } else
471
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228 #endif
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229 {
471
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230 if (currently_fullscreen) {
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231 GrArea(FSwindow, SDL_GC, OffsetX, OffsetY, this->screen->w,
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232 this->screen->h, SDL_Image, pixel_type);
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233 } else {
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234 GrArea(SDL_Window, SDL_GC, 0, 0, this->screen->w,
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235 this->screen->h, SDL_Image, pixel_type);
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236 }
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237 }
471
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238 GrFlush();
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239
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240 Dprintf("leave NX_RefreshDisplay\n");
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241 }
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242
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243 /* vi: set ts=4 sw=4 expandtab: */