annotate src/video/aalib/SDL_aavideo.c @ 1338:604d73db6802

Removed uses of stdlib.h and string.h
author Sam Lantinga <slouken@libsdl.org>
date Tue, 07 Feb 2006 09:29:18 +0000
parents 3692456e7b0f
children c71e05b4dc2e
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /* AAlib based SDL video driver implementation.
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24 */
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25
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26 #include <unistd.h>
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27 #include <sys/stat.h>
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28
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29
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30 #include "SDL.h"
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31 #include "SDL_stdlib.h"
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32 #include "SDL_string.h"
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33 #include "SDL_error.h"
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34 #include "SDL_video.h"
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35 #include "SDL_mouse.h"
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36 #include "SDL_sysvideo.h"
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37 #include "SDL_pixels_c.h"
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38 #include "SDL_events_c.h"
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39
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40 #include "SDL_aavideo.h"
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41 #include "SDL_aaevents_c.h"
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42 #include "SDL_aamouse_c.h"
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43
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44 #include <aalib.h>
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45
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46 /* Initialization/Query functions */
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47 static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat);
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48 static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
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49 static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
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50 static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
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51 static void AA_VideoQuit(_THIS);
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52
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53 /* Hardware surface functions */
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54 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface);
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55 static int AA_LockHWSurface(_THIS, SDL_Surface *surface);
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56 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface);
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57 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface);
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58 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface);
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59
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60 /* Cache the VideoDevice struct */
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61 static struct SDL_VideoDevice *local_this;
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62
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63 /* AAlib driver bootstrap functions */
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64
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65 static int AA_Available(void)
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66 {
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67 return 1; /* Always available ! */
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68 }
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69
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70 static void AA_DeleteDevice(SDL_VideoDevice *device)
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71 {
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72 SDL_free(device->hidden);
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73 SDL_free(device);
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74 }
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75
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76 static SDL_VideoDevice *AA_CreateDevice(int devindex)
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77 {
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78 SDL_VideoDevice *device;
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79
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80 /* Initialize all variables that we clean on shutdown */
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81 device = (SDL_VideoDevice *)SDL_malloc(sizeof(SDL_VideoDevice));
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82 if ( device ) {
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83 SDL_memset(device, 0, (sizeof *device));
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84 device->hidden = (struct SDL_PrivateVideoData *)
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85 SDL_malloc((sizeof *device->hidden));
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86 }
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87 if ( (device == NULL) || (device->hidden == NULL) ) {
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88 SDL_OutOfMemory();
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89 if ( device ) {
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90 SDL_free(device);
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91 }
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92 return(0);
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93 }
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94 SDL_memset(device->hidden, 0, (sizeof *device->hidden));
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95
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96 /* Set the function pointers */
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97 device->VideoInit = AA_VideoInit;
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98 device->ListModes = AA_ListModes;
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99 device->SetVideoMode = AA_SetVideoMode;
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100 device->CreateYUVOverlay = NULL;
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101 device->SetColors = AA_SetColors;
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102 device->UpdateRects = NULL;
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103 device->VideoQuit = AA_VideoQuit;
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104 device->AllocHWSurface = AA_AllocHWSurface;
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105 device->CheckHWBlit = NULL;
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106 device->FillHWRect = NULL;
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107 device->SetHWColorKey = NULL;
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108 device->SetHWAlpha = NULL;
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109 device->LockHWSurface = AA_LockHWSurface;
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110 device->UnlockHWSurface = AA_UnlockHWSurface;
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111 device->FlipHWSurface = NULL;
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112 device->FreeHWSurface = AA_FreeHWSurface;
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113 device->SetCaption = NULL;
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114 device->SetIcon = NULL;
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115 device->IconifyWindow = NULL;
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116 device->GrabInput = NULL;
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117 device->GetWMInfo = NULL;
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118 device->InitOSKeymap = AA_InitOSKeymap;
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119 device->PumpEvents = AA_PumpEvents;
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120
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121 device->free = AA_DeleteDevice;
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122
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123 return device;
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124 }
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125
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126 VideoBootStrap AALIB_bootstrap = {
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127 "aalib", "ASCII Art Library",
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128 AA_Available, AA_CreateDevice
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129 };
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130
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131 static void AA_ResizeHandler(aa_context *);
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132
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133 int AA_VideoInit(_THIS, SDL_PixelFormat *vformat)
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134 {
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135 int keyboard;
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136 int i;
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137
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138 /* Initialize all variables that we clean on shutdown */
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139 for ( i=0; i<SDL_NUMMODES; ++i ) {
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140 SDL_modelist[i] = SDL_malloc(sizeof(SDL_Rect));
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141 SDL_modelist[i]->x = SDL_modelist[i]->y = 0;
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142 }
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143 /* Modes sorted largest to smallest */
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144 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768;
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145 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600;
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146 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480;
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147 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400;
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148 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240;
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149 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200;
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150 SDL_modelist[6] = NULL;
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151
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152 /* Initialize the library */
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153
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154 AA_mutex = SDL_CreateMutex();
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155
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156 aa_parseoptions (NULL, NULL, NULL, NULL);
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157
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158 AA_context = aa_autoinit(&aa_defparams);
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159 if ( ! AA_context ) {
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160 SDL_SetError("Unable to initialize AAlib");
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161 return(-1);
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162 }
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163
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164 /* Enable mouse and keyboard support */
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165
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166 if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) {
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167 SDL_SetError("Unable to initialize AAlib keyboard");
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168 return(-1);
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169 }
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170 if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) {
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171 fprintf(stderr,"Warning: Unable to initialize AAlib mouse");
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172 }
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173 AA_rparams = aa_getrenderparams();
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174
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175 local_this = this;
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176
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177 aa_resizehandler(AA_context, AA_ResizeHandler);
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178
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179 fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname);
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180
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181 AA_in_x11 = (SDL_strcmp(AA_context->driver->shortname,"X11") == 0);
0
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182 /* Determine the screen depth (use default 8-bit depth) */
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183 vformat->BitsPerPixel = 8;
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184 vformat->BytesPerPixel = 1;
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185
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186 /* We're done! */
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187 return(0);
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188 }
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189
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190 SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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191 {
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192 if(format->BitsPerPixel != 8)
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193 return NULL;
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194
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195 if ( flags & SDL_FULLSCREEN ) {
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196 return SDL_modelist;
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197 } else {
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198 return (SDL_Rect **) -1;
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199 }
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200 }
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201
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202 /* From aavga.c
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203 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional
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204 resolution by scaling down manually each frame
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205 */
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206 static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2)
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207 {
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208 register int ex, spx = 0, ddx, ddx1;
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209 int ddy1, ddy, spy = 0, ey;
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210 int x;
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211 char *bb1 = b1;
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212 if (!x1 || !x2 || !y1 || !y2)
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213 return;
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214 ddx = x1 + x1;
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215 ddx1 = x2 + x2;
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216 if (ddx1 < ddx)
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217 spx = ddx / ddx1, ddx %= ddx1;
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218 ddy = y1 + y1;
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219 ddy1 = y2 + y2;
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220 if (ddy1 < ddy)
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221 spy = (ddy / ddy1) * x1, ddy %= ddy1;
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222 ey = -ddy1;
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diff changeset
223 for (; y2; y2--) {
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224 ex = -ddx1;
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225 for (x = x2; x; x--) {
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226 *b2 = *b1;
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227 b2++;
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228 b1 += spx;
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229 ex += ddx;
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230 if (ex > 0) {
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231 b1++;
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232 ex -= ddx1;
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233 }
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234 }
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235 bb1 += spy;
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236 ey += ddy;
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237 if (ey > 0) {
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238 bb1 += x1;
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239 ey -= ddy1;
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240 }
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241 b1 = bb1;
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242 }
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243 }
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244
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245 /* Various screen update functions available */
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246 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
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247
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248 SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current,
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249 int width, int height, int bpp, Uint32 flags)
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250 {
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251 int mode;
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diff changeset
252
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253 if ( AA_buffer ) {
1336
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parents: 1320
diff changeset
254 SDL_free( AA_buffer );
0
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255 }
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diff changeset
256
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diff changeset
257 AA_buffer = SDL_malloc(width * height);
0
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258 if ( ! AA_buffer ) {
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diff changeset
259 SDL_SetError("Couldn't allocate buffer for requested mode");
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260 return(NULL);
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parents:
diff changeset
261 }
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diff changeset
262
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diff changeset
263 /* printf("Setting mode %dx%d\n", width, height); */
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264
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265 SDL_memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context));
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parents: 1320
diff changeset
266 SDL_memset(AA_buffer, 0, width * height);
0
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diff changeset
267
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parents:
diff changeset
268 /* Allocate the new pixel format for the screen */
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diff changeset
269 if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) {
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diff changeset
270 return(NULL);
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parents:
diff changeset
271 }
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diff changeset
272
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parents:
diff changeset
273 /* Set up the new mode framebuffer */
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parents:
diff changeset
274 current->flags = SDL_FULLSCREEN;
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diff changeset
275 AA_w = current->w = width;
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diff changeset
276 AA_h = current->h = height;
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diff changeset
277 current->pitch = current->w;
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parents:
diff changeset
278 current->pixels = AA_buffer;
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diff changeset
279
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diff changeset
280 AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width);
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parents:
diff changeset
281 AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height);
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parents:
diff changeset
282
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parents:
diff changeset
283 /* Set the blit function */
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diff changeset
284 this->UpdateRects = AA_DirectUpdate;
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parents:
diff changeset
285
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parents:
diff changeset
286 /* We're done */
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parents:
diff changeset
287 return(current);
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parents:
diff changeset
288 }
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parents:
diff changeset
289
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parents:
diff changeset
290 static void AA_ResizeHandler(aa_context *context)
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parents:
diff changeset
291 {
74212992fb08 Initial revision
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parents:
diff changeset
292 aa_resize(context);
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parents:
diff changeset
293 local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w);
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parents:
diff changeset
294 local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h);
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diff changeset
295
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parents:
diff changeset
296 fastscale (local_this->hidden->buffer, aa_image(context), local_this->hidden->w, aa_imgwidth (context), local_this->hidden->h, aa_imgheight (context));
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parents:
diff changeset
297 aa_renderpalette(context, local_this->hidden->palette, local_this->hidden->rparams, 0, 0, aa_scrwidth(context), aa_scrheight(context));
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parents:
diff changeset
298 aa_flush(context);
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parents:
diff changeset
299 }
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parents:
diff changeset
300
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parents:
diff changeset
301 /* We don't actually allow hardware surfaces other than the main one */
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parents:
diff changeset
302 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
303 {
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parents:
diff changeset
304 return(-1);
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parents:
diff changeset
305 }
74212992fb08 Initial revision
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parents:
diff changeset
306 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
307 {
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parents:
diff changeset
308 return;
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parents:
diff changeset
309 }
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parents:
diff changeset
310
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parents:
diff changeset
311 /* We need to wait for vertical retrace on page flipped displays */
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parents:
diff changeset
312 static int AA_LockHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
313 {
74212992fb08 Initial revision
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parents:
diff changeset
314 /* TODO ? */
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parents:
diff changeset
315 return(0);
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parents:
diff changeset
316 }
74212992fb08 Initial revision
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parents:
diff changeset
317 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
318 {
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parents:
diff changeset
319 return;
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parents:
diff changeset
320 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321
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parents:
diff changeset
322 /* FIXME: How is this done with AAlib? */
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parents:
diff changeset
323 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface)
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parents:
diff changeset
324 {
74212992fb08 Initial revision
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parents:
diff changeset
325 SDL_mutexP(AA_mutex);
74212992fb08 Initial revision
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parents:
diff changeset
326 aa_flush(AA_context);
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parents:
diff changeset
327 SDL_mutexV(AA_mutex);
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328 return(0);
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329 }
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330
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331 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
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332 {
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333 int i;
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334 SDL_Rect *rect;
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335
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336 fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context));
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337 #if 1
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338 aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context));
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339 #else
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340 /* Render only the rectangles in the list */
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341 printf("Update rects : ");
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342 for ( i=0; i < numrects; ++i ) {
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343 rect = &rects[i];
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344 printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h);
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345 aa_renderpalette(AA_context, AA_palette, AA_rparams, rect->x * AA_x_ratio, rect->y * AA_y_ratio, rect->w * AA_x_ratio, rect->h * AA_y_ratio);
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346 }
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347 printf("\n");
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348 #endif
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349 SDL_mutexP(AA_mutex);
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350 aa_flush(AA_context);
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351 SDL_mutexV(AA_mutex);
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352 return;
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353 }
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354
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355 int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
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356 {
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357 int i;
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358
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359 for ( i=0; i < ncolors; i++ ) {
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360 aa_setpalette(AA_palette, firstcolor + i,
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361 colors[i].r>>2,
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362 colors[i].g>>2,
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363 colors[i].b>>2);
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364 }
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365 return(1);
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366 }
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367
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368 /* Note: If we are terminated, this could be called in the middle of
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369 another SDL video routine -- notably UpdateRects.
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370 */
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371 void AA_VideoQuit(_THIS)
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372 {
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373 int i;
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374
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375 aa_uninitkbd(AA_context);
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376 aa_uninitmouse(AA_context);
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377
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378 /* Free video mode lists */
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379 for ( i=0; i<SDL_NUMMODES; ++i ) {
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380 if ( SDL_modelist[i] != NULL ) {
1336
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381 SDL_free(SDL_modelist[i]);
0
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382 SDL_modelist[i] = NULL;
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383 }
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384 }
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385
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386 aa_close(AA_context);
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387
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388 SDL_DestroyMutex(AA_mutex);
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389
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390 this->screen->pixels = NULL;
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391 }