annotate src/video/aalib/SDL_aavideo.c @ 252:e8157fcb3114

Updated the source with the correct e-mail address
author Sam Lantinga <slouken@libsdl.org>
date Fri, 14 Dec 2001 12:38:15 +0000
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children f6ffac90895c
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, 1998, 1999, 2000, 2001 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 Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 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 Library 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 Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
252
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20 slouken@libsdl.org
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21 */
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22
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23 #ifdef SAVE_RCSID
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24 static char rcsid =
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25 "@(#) $Id$";
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26 #endif
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27
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28 /* AAlib based SDL video driver implementation.
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29 */
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30
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31 #include <stdlib.h>
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32 #include <stdio.h>
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33 #include <unistd.h>
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34 #include <sys/stat.h>
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35
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36
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37 #include "SDL.h"
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38 #include "SDL_error.h"
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39 #include "SDL_video.h"
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40 #include "SDL_mouse.h"
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41 #include "SDL_sysvideo.h"
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42 #include "SDL_pixels_c.h"
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43 #include "SDL_events_c.h"
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44
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45 #include "SDL_aavideo.h"
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46 #include "SDL_aaevents_c.h"
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47 #include "SDL_aamouse_c.h"
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48
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49 #include <aalib.h>
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50
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51 /* Initialization/Query functions */
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52 static int AA_VideoInit(_THIS, SDL_PixelFormat *vformat);
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53 static SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
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54 static SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
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55 static int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
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56 static void AA_VideoQuit(_THIS);
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57
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58 /* Hardware surface functions */
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59 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface);
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60 static int AA_LockHWSurface(_THIS, SDL_Surface *surface);
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61 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface);
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62 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface);
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63 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface);
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64
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65 /* Cache the VideoDevice struct */
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66 static struct SDL_VideoDevice *local_this;
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67
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68 /* AAlib driver bootstrap functions */
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69
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70 static int AA_Available(void)
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71 {
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72 return 1; /* Always available ! */
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73 }
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74
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75 static void AA_DeleteDevice(SDL_VideoDevice *device)
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76 {
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77 free(device->hidden);
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78 free(device);
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79 }
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80
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81 static SDL_VideoDevice *AA_CreateDevice(int devindex)
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82 {
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83 SDL_VideoDevice *device;
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84
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85 /* Initialize all variables that we clean on shutdown */
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86 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
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87 if ( device ) {
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88 memset(device, 0, (sizeof *device));
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89 device->hidden = (struct SDL_PrivateVideoData *)
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90 malloc((sizeof *device->hidden));
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91 }
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92 if ( (device == NULL) || (device->hidden == NULL) ) {
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93 SDL_OutOfMemory();
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94 if ( device ) {
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95 free(device);
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96 }
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97 return(0);
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98 }
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99 memset(device->hidden, 0, (sizeof *device->hidden));
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100
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101 /* Set the function pointers */
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102 device->VideoInit = AA_VideoInit;
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103 device->ListModes = AA_ListModes;
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104 device->SetVideoMode = AA_SetVideoMode;
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105 device->CreateYUVOverlay = NULL;
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106 device->SetColors = AA_SetColors;
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107 device->UpdateRects = NULL;
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108 device->VideoQuit = AA_VideoQuit;
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109 device->AllocHWSurface = AA_AllocHWSurface;
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110 device->CheckHWBlit = NULL;
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111 device->FillHWRect = NULL;
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112 device->SetHWColorKey = NULL;
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113 device->SetHWAlpha = NULL;
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114 device->LockHWSurface = AA_LockHWSurface;
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115 device->UnlockHWSurface = AA_UnlockHWSurface;
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116 device->FlipHWSurface = NULL;
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117 device->FreeHWSurface = AA_FreeHWSurface;
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118 device->SetCaption = NULL;
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119 device->SetIcon = NULL;
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120 device->IconifyWindow = NULL;
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121 device->GrabInput = NULL;
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122 device->GetWMInfo = NULL;
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123 device->InitOSKeymap = AA_InitOSKeymap;
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124 device->PumpEvents = AA_PumpEvents;
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125
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126 device->free = AA_DeleteDevice;
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127
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128 return device;
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129 }
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130
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131 VideoBootStrap AALIB_bootstrap = {
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132 "aalib", "ASCII Art Library",
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133 AA_Available, AA_CreateDevice
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134 };
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135
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136 static void AA_ResizeHandler(aa_context *);
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137
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138 int AA_VideoInit(_THIS, SDL_PixelFormat *vformat)
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139 {
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140 int keyboard;
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141 int i;
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142
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143 /* Initialize all variables that we clean on shutdown */
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144 for ( i=0; i<SDL_NUMMODES; ++i ) {
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145 SDL_modelist[i] = malloc(sizeof(SDL_Rect));
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146 SDL_modelist[i]->x = SDL_modelist[i]->y = 0;
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147 }
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148 /* Modes sorted largest to smallest */
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149 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768;
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150 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600;
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151 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480;
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152 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400;
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153 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240;
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154 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200;
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155 SDL_modelist[6] = NULL;
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156
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157 /* Initialize the library */
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158
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159 AA_mutex = SDL_CreateMutex();
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160
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161 aa_parseoptions (NULL, NULL, NULL, NULL);
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162
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163 AA_context = aa_autoinit(&aa_defparams);
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164 if ( ! AA_context ) {
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165 SDL_SetError("Unable to initialize AAlib");
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166 return(-1);
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167 }
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168
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169 /* Enable mouse and keyboard support */
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170
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171 if ( ! aa_autoinitkbd (AA_context, AA_SENDRELEASE) ) {
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172 SDL_SetError("Unable to initialize AAlib keyboard");
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173 return(-1);
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parents:
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174 }
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175 if ( ! aa_autoinitmouse (AA_context, AA_SENDRELEASE) ) {
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176 fprintf(stderr,"Warning: Unable to initialize AAlib mouse");
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177 }
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178 AA_rparams = aa_getrenderparams();
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179
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180 local_this = this;
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181
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182 aa_resizehandler(AA_context, AA_ResizeHandler);
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183
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184 fprintf(stderr,"Using AAlib driver: %s (%s)\n", AA_context->driver->name, AA_context->driver->shortname);
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185
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186 AA_in_x11 = (strcmp(AA_context->driver->shortname,"X11") == 0);
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187 /* Determine the screen depth (use default 8-bit depth) */
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188 vformat->BitsPerPixel = 8;
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189 vformat->BytesPerPixel = 1;
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190
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191 /* We're done! */
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192 return(0);
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193 }
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194
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195 SDL_Rect **AA_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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196 {
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197 if(format->BitsPerPixel != 8)
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198 return NULL;
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199
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200 if ( flags & SDL_FULLSCREEN ) {
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201 return SDL_modelist;
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202 } else {
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203 return (SDL_Rect **) -1;
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204 }
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205 }
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206
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207 /* From aavga.c
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208 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional
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209 resolution by scaling down manually each frame
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210 */
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211 static void fastscale (register char *b1, register char *b2, int x1, int x2, int y1, int y2)
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212 {
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213 register int ex, spx = 0, ddx, ddx1;
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214 int ddy1, ddy, spy = 0, ey;
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215 int x;
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216 char *bb1 = b1;
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217 if (!x1 || !x2 || !y1 || !y2)
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218 return;
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219 ddx = x1 + x1;
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220 ddx1 = x2 + x2;
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diff changeset
221 if (ddx1 < ddx)
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222 spx = ddx / ddx1, ddx %= ddx1;
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223 ddy = y1 + y1;
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diff changeset
224 ddy1 = y2 + y2;
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225 if (ddy1 < ddy)
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diff changeset
226 spy = (ddy / ddy1) * x1, ddy %= ddy1;
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diff changeset
227 ey = -ddy1;
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diff changeset
228 for (; y2; y2--) {
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diff changeset
229 ex = -ddx1;
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diff changeset
230 for (x = x2; x; x--) {
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diff changeset
231 *b2 = *b1;
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diff changeset
232 b2++;
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diff changeset
233 b1 += spx;
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diff changeset
234 ex += ddx;
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diff changeset
235 if (ex > 0) {
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diff changeset
236 b1++;
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diff changeset
237 ex -= ddx1;
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238 }
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diff changeset
239 }
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diff changeset
240 bb1 += spy;
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parents:
diff changeset
241 ey += ddy;
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parents:
diff changeset
242 if (ey > 0) {
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diff changeset
243 bb1 += x1;
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diff changeset
244 ey -= ddy1;
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diff changeset
245 }
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diff changeset
246 b1 = bb1;
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diff changeset
247 }
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248 }
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249
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diff changeset
250 /* Various screen update functions available */
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251 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
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252
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253 SDL_Surface *AA_SetVideoMode(_THIS, SDL_Surface *current,
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diff changeset
254 int width, int height, int bpp, Uint32 flags)
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parents:
diff changeset
255 {
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diff changeset
256 int mode;
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diff changeset
257
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parents:
diff changeset
258 if ( AA_buffer ) {
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parents:
diff changeset
259 free( AA_buffer );
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parents:
diff changeset
260 }
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parents:
diff changeset
261
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diff changeset
262 AA_buffer = malloc(width * height);
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parents:
diff changeset
263 if ( ! AA_buffer ) {
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parents:
diff changeset
264 SDL_SetError("Couldn't allocate buffer for requested mode");
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diff changeset
265 return(NULL);
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parents:
diff changeset
266 }
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parents:
diff changeset
267
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parents:
diff changeset
268 /* printf("Setting mode %dx%d\n", width, height); */
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diff changeset
269
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diff changeset
270 memset(aa_image(AA_context), 0, aa_imgwidth(AA_context) * aa_imgheight(AA_context));
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diff changeset
271 memset(AA_buffer, 0, width * height);
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parents:
diff changeset
272
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parents:
diff changeset
273 /* Allocate the new pixel format for the screen */
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parents:
diff changeset
274 if ( ! SDL_ReallocFormat(current, 8, 0, 0, 0, 0) ) {
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parents:
diff changeset
275 return(NULL);
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parents:
diff changeset
276 }
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parents:
diff changeset
277
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parents:
diff changeset
278 /* Set up the new mode framebuffer */
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parents:
diff changeset
279 current->flags = SDL_FULLSCREEN;
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parents:
diff changeset
280 AA_w = current->w = width;
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parents:
diff changeset
281 AA_h = current->h = height;
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parents:
diff changeset
282 current->pitch = current->w;
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parents:
diff changeset
283 current->pixels = AA_buffer;
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parents:
diff changeset
284
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diff changeset
285 AA_x_ratio = ((double)aa_imgwidth(AA_context)) / ((double)width);
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parents:
diff changeset
286 AA_y_ratio = ((double)aa_imgheight(AA_context)) / ((double)height);
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parents:
diff changeset
287
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288 /* Set the blit function */
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parents:
diff changeset
289 this->UpdateRects = AA_DirectUpdate;
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parents:
diff changeset
290
74212992fb08 Initial revision
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parents:
diff changeset
291 /* We're done */
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parents:
diff changeset
292 return(current);
74212992fb08 Initial revision
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parents:
diff changeset
293 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294
74212992fb08 Initial revision
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parents:
diff changeset
295 static void AA_ResizeHandler(aa_context *context)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
296 {
74212992fb08 Initial revision
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parents:
diff changeset
297 aa_resize(context);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
298 local_this->hidden->x_ratio = ((double)aa_imgwidth(context)) / ((double)local_this->screen->w);
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parents:
diff changeset
299 local_this->hidden->y_ratio = ((double)aa_imgheight(context)) / ((double)local_this->screen->h);
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parents:
diff changeset
300
74212992fb08 Initial revision
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parents:
diff changeset
301 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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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
302 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
303 aa_flush(context);
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
304 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
305
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
306 /* We don't actually allow hardware surfaces other than the main one */
74212992fb08 Initial revision
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parents:
diff changeset
307 static int AA_AllocHWSurface(_THIS, SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
308 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
309 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
310 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
311 static void AA_FreeHWSurface(_THIS, SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
312 {
74212992fb08 Initial revision
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parents:
diff changeset
313 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
314 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
315
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
316 /* We need to wait for vertical retrace on page flipped displays */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
317 static int AA_LockHWSurface(_THIS, SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
318 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
319 /* TODO ? */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
320 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
321 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
322 static void AA_UnlockHWSurface(_THIS, SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
323 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
324 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
325 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
326
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
327 /* FIXME: How is this done with AAlib? */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
328 static int AA_FlipHWSurface(_THIS, SDL_Surface *surface)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
329 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
330 SDL_mutexP(AA_mutex);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
331 aa_flush(AA_context);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
332 SDL_mutexV(AA_mutex);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
333 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
334 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
335
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
336 static void AA_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
337 {
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338 int i;
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339 SDL_Rect *rect;
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340
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341 fastscale (AA_buffer, aa_image(AA_context), AA_w, aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context));
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342 #if 1
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343 aa_renderpalette(AA_context, AA_palette, AA_rparams, 0, 0, aa_scrwidth(AA_context), aa_scrheight(AA_context));
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344 #else
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345 /* Render only the rectangles in the list */
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346 printf("Update rects : ");
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347 for ( i=0; i < numrects; ++i ) {
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348 rect = &rects[i];
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349 printf("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h);
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350 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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351 }
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352 printf("\n");
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353 #endif
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354 SDL_mutexP(AA_mutex);
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355 aa_flush(AA_context);
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356 SDL_mutexV(AA_mutex);
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357 return;
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358 }
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359
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360 int AA_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
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361 {
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362 int i;
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363
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364 for ( i=0; i < ncolors; i++ ) {
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365 aa_setpalette(AA_palette, firstcolor + i,
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366 colors[i].r>>2,
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367 colors[i].g>>2,
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368 colors[i].b>>2);
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369 }
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370 return(1);
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371 }
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372
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373 /* Note: If we are terminated, this could be called in the middle of
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374 another SDL video routine -- notably UpdateRects.
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375 */
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376 void AA_VideoQuit(_THIS)
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377 {
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378 int i;
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379
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380 aa_uninitkbd(AA_context);
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381 aa_uninitmouse(AA_context);
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382
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383 /* Free video mode lists */
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384 for ( i=0; i<SDL_NUMMODES; ++i ) {
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385 if ( SDL_modelist[i] != NULL ) {
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386 free(SDL_modelist[i]);
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387 SDL_modelist[i] = NULL;
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388 }
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389 }
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390
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391 aa_close(AA_context);
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392
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393 SDL_DestroyMutex(AA_mutex);
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394
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395 this->screen->pixels = NULL;
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396 }