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annotate src/video/aalib/SDL_aavideo.c @ 1667:1fddae038bc8 SDL-1.3

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Implemented many compatibility functions
author Sam Lantinga <slouken@libsdl.org>
date Mon, 29 May 2006 03:53:21 +0000
parents 782fd950bd46
children 4da1ee79c9af
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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18
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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 #include "SDL_config.h"
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23
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24 /* AAlib based SDL video driver implementation.
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25 */
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26
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27 #include <unistd.h>
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28 #include <sys/stat.h>
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29
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30
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31 #include "SDL_video.h"
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32 #include "SDL_mouse.h"
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33 #include "../SDL_sysvideo.h"
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34 #include "../SDL_pixels_c.h"
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35 #include "../../events/SDL_events_c.h"
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36
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37 #include "SDL_aavideo.h"
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38 #include "SDL_aaevents_c.h"
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39 #include "SDL_aamouse_c.h"
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40
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41 #include <aalib.h>
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42
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43 /* Initialization/Query functions */
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44 static int AA_VideoInit (_THIS, SDL_PixelFormat * vformat);
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45 static SDL_Rect **AA_ListModes (_THIS, SDL_PixelFormat * format,
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46 Uint32 flags);
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47 static SDL_Surface *AA_SetVideoMode (_THIS, SDL_Surface * current, int width,
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48 int height, int bpp, Uint32 flags);
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49 static int AA_SetColors (_THIS, int firstcolor, int ncolors,
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50 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
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66 AA_Available (void)
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67 {
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68 return 1; /* Always available ! */
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69 }
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70
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71 static void
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72 AA_DeleteDevice (SDL_VideoDevice * device)
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73 {
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74 SDL_free (device->hidden);
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75 SDL_free (device);
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76 }
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77
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78 static SDL_VideoDevice *
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79 AA_CreateDevice (int devindex)
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80 {
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81 SDL_VideoDevice *device;
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82
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83 /* Initialize all variables that we clean on shutdown */
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84 device = (SDL_VideoDevice *) SDL_malloc (sizeof (SDL_VideoDevice));
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85 if (device) {
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86 SDL_memset (device, 0, (sizeof *device));
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87 device->hidden = (struct SDL_PrivateVideoData *)
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88 SDL_malloc ((sizeof *device->hidden));
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89 }
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90 if ((device == NULL) || (device->hidden == NULL)) {
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91 SDL_OutOfMemory ();
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92 if (device) {
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93 SDL_free (device);
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94 }
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95 return (0);
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96 }
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97 SDL_memset (device->hidden, 0, (sizeof *device->hidden));
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98
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99 /* Set the function pointers */
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100 device->VideoInit = AA_VideoInit;
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101 device->ListModes = AA_ListModes;
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102 device->SetVideoMode = AA_SetVideoMode;
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103 device->CreateYUVOverlay = NULL;
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104 device->SetColors = AA_SetColors;
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105 device->UpdateRects = NULL;
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106 device->VideoQuit = AA_VideoQuit;
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107 device->AllocHWSurface = AA_AllocHWSurface;
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108 device->CheckHWBlit = NULL;
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109 device->FillHWRect = NULL;
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110 device->SetHWColorKey = NULL;
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111 device->SetHWAlpha = NULL;
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112 device->LockHWSurface = AA_LockHWSurface;
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113 device->UnlockHWSurface = AA_UnlockHWSurface;
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114 device->FlipHWSurface = NULL;
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115 device->FreeHWSurface = AA_FreeHWSurface;
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116 device->SetCaption = NULL;
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117 device->SetIcon = NULL;
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118 device->IconifyWindow = NULL;
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119 device->GrabInput = NULL;
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120 device->GetWMInfo = NULL;
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121 device->InitOSKeymap = AA_InitOSKeymap;
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122 device->PumpEvents = AA_PumpEvents;
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123
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124 device->free = AA_DeleteDevice;
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125
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126 return device;
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127 }
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128
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129 VideoBootStrap AALIB_bootstrap = {
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130 "aalib", "ASCII Art Library",
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131 AA_Available, AA_CreateDevice
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132 };
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133
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134 static void AA_ResizeHandler (aa_context *);
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135
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136 int
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137 AA_VideoInit (_THIS, SDL_PixelFormat * vformat)
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138 {
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139 int keyboard;
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140 int i;
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141
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142 /* Initialize all variables that we clean on shutdown */
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143 for (i = 0; i < SDL_NUMMODES; ++i) {
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144 SDL_modelist[i] = SDL_malloc (sizeof (SDL_Rect));
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145 SDL_modelist[i]->x = SDL_modelist[i]->y = 0;
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146 }
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147 /* Modes sorted largest to smallest */
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148 SDL_modelist[0]->w = 1024;
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149 SDL_modelist[0]->h = 768;
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150 SDL_modelist[1]->w = 800;
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151 SDL_modelist[1]->h = 600;
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152 SDL_modelist[2]->w = 640;
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153 SDL_modelist[2]->h = 480;
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154 SDL_modelist[3]->w = 320;
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155 SDL_modelist[3]->h = 400;
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156 SDL_modelist[4]->w = 320;
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157 SDL_modelist[4]->h = 240;
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158 SDL_modelist[5]->w = 320;
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159 SDL_modelist[5]->h = 200;
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160 SDL_modelist[6] = NULL;
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161
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162 /* Initialize the library */
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163
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164 AA_mutex = SDL_CreateMutex ();
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165
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166 aa_parseoptions (NULL, NULL, NULL, NULL);
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167
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168 AA_context = aa_autoinit (&aa_defparams);
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169 if (!AA_context) {
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170 SDL_SetError ("Unable to initialize AAlib");
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171 return (-1);
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172 }
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173
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174 /* Enable mouse and keyboard support */
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175
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176 if (!aa_autoinitkbd (AA_context, AA_SENDRELEASE)) {
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177 SDL_SetError ("Unable to initialize AAlib keyboard");
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178 return (-1);
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179 }
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180 if (!aa_autoinitmouse (AA_context, AA_SENDRELEASE)) {
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181 fprintf (stderr, "Warning: Unable to initialize AAlib mouse");
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182 }
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183 AA_rparams = aa_getrenderparams ();
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184
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185 local_this = this;
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186
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187 aa_resizehandler (AA_context, AA_ResizeHandler);
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188
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189 fprintf (stderr, "Using AAlib driver: %s (%s)\n",
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190 AA_context->driver->name, AA_context->driver->shortname);
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191
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192 AA_in_x11 = (SDL_strcmp (AA_context->driver->shortname, "X11") == 0);
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193 /* Determine the screen depth (use default 8-bit depth) */
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194 vformat->BitsPerPixel = 8;
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195 vformat->BytesPerPixel = 1;
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196
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197 /* We're done! */
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198 return (0);
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199 }
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200
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201 SDL_Rect **
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202 AA_ListModes (_THIS, SDL_PixelFormat * format, Uint32 flags)
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203 {
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204 if (format->BitsPerPixel != 8)
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205 return NULL;
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206
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207 if (flags & SDL_FULLSCREEN) {
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208 return SDL_modelist;
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209 } else {
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210 return (SDL_Rect **) - 1;
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211 }
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212 }
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213
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214 /* From aavga.c
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215 AAlib does not give us the choice of the actual resolution, thus we have to simulate additional
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216 resolution by scaling down manually each frame
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217 */
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218 static void
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219 fastscale (register char *b1, register char *b2, int x1, int x2, int y1,
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220 int y2)
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221 {
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222 register int ex, spx = 0, ddx, ddx1;
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223 int ddy1, ddy, spy = 0, ey;
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224 int x;
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225 char *bb1 = b1;
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226 if (!x1 || !x2 || !y1 || !y2)
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227 return;
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228 ddx = x1 + x1;
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229 ddx1 = x2 + x2;
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230 if (ddx1 < ddx)
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231 spx = ddx / ddx1, ddx %= ddx1;
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232 ddy = y1 + y1;
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233 ddy1 = y2 + y2;
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234 if (ddy1 < ddy)
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235 spy = (ddy / ddy1) * x1, ddy %= ddy1;
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236 ey = -ddy1;
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237 for (; y2; y2--) {
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238 ex = -ddx1;
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239 for (x = x2; x; x--) {
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240 *b2 = *b1;
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241 b2++;
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242 b1 += spx;
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243 ex += ddx;
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244 if (ex > 0) {
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245 b1++;
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246 ex -= ddx1;
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247 }
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248 }
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249 bb1 += spy;
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250 ey += ddy;
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251 if (ey > 0) {
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252 bb1 += x1;
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253 ey -= ddy1;
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254 }
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255 b1 = bb1;
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256 }
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257 }
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258
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259 /* Various screen update functions available */
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260 static void AA_DirectUpdate (_THIS, int numrects, SDL_Rect * rects);
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261
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262 SDL_Surface *
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263 AA_SetVideoMode (_THIS, SDL_Surface * current,
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264 int width, int height, int bpp, Uint32 flags)
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265 {
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266 int mode;
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267
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268 if (AA_buffer) {
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269 SDL_free (AA_buffer);
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270 }
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271
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272 AA_buffer = SDL_malloc (width * height);
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273 if (!AA_buffer) {
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274 SDL_SetError ("Couldn't allocate buffer for requested mode");
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275 return (NULL);
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276 }
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277
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278 /* printf("Setting mode %dx%d\n", width, height); */
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279
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280 SDL_memset (aa_image (AA_context), 0,
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281 aa_imgwidth (AA_context) * aa_imgheight (AA_context));
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282 SDL_memset (AA_buffer, 0, width * height);
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283
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284 /* Allocate the new pixel format for the screen */
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285 if (!SDL_ReallocFormat (current, 8, 0, 0, 0, 0)) {
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286 return (NULL);
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287 }
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288
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289 /* Set up the new mode framebuffer */
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290 current->flags = SDL_FULLSCREEN;
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291 AA_w = current->w = width;
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292 AA_h = current->h = height;
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293 current->pitch = current->w;
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294 current->pixels = AA_buffer;
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295
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296 AA_x_ratio = ((double) aa_imgwidth (AA_context)) / ((double) width);
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297 AA_y_ratio = ((double) aa_imgheight (AA_context)) / ((double) height);
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298
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299 /* Set the blit function */
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300 this->UpdateRects = AA_DirectUpdate;
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301
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302 /* We're done */
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303 return (current);
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304 }
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305
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306 static void
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307 AA_ResizeHandler (aa_context * context)
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308 {
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309 aa_resize (context);
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310 local_this->hidden->x_ratio =
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311 ((double) aa_imgwidth (context)) / ((double) local_this->screen->w);
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312 local_this->hidden->y_ratio =
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313 ((double) aa_imgheight (context)) / ((double) local_this->screen->h);
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314
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315 fastscale (local_this->hidden->buffer, aa_image (context),
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316 local_this->hidden->w, aa_imgwidth (context),
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317 local_this->hidden->h, aa_imgheight (context));
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318 aa_renderpalette (context, local_this->hidden->palette,
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319 local_this->hidden->rparams, 0, 0,
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320 aa_scrwidth (context), aa_scrheight (context));
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321 aa_flush (context);
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322 }
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323
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324 /* We don't actually allow hardware surfaces other than the main one */
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325 static int
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326 AA_AllocHWSurface (_THIS, SDL_Surface * surface)
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327 {
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328 return (-1);
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329 }
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330 static void
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331 AA_FreeHWSurface (_THIS, SDL_Surface * surface)
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332 {
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333 return;
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334 }
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335
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336 /* We need to wait for vertical retrace on page flipped displays */
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337 static int
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338 AA_LockHWSurface (_THIS, SDL_Surface * surface)
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339 {
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340 /* TODO ? */
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341 return (0);
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342 }
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343 static void
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344 AA_UnlockHWSurface (_THIS, SDL_Surface * surface)
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345 {
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346 return;
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347 }
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348
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349 /* FIXME: How is this done with AAlib? */
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350 static int
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351 AA_FlipHWSurface (_THIS, SDL_Surface * surface)
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352 {
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353 SDL_mutexP (AA_mutex);
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354 aa_flush (AA_context);
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355 SDL_mutexV (AA_mutex);
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356 return (0);
0
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357 }
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358
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359 static void
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360 AA_DirectUpdate (_THIS, int numrects, SDL_Rect * rects)
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361 {
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362 int i;
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363 SDL_Rect *rect;
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364
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365 fastscale (AA_buffer, aa_image (AA_context), AA_w,
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366 aa_imgwidth (AA_context), AA_h, aa_imgheight (AA_context));
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367 #if 1
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368 aa_renderpalette (AA_context, AA_palette, AA_rparams, 0, 0,
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369 aa_scrwidth (AA_context), aa_scrheight (AA_context));
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diff changeset
370 #else
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371 /* Render only the rectangles in the list */
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372 printf ("Update rects : ");
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373 for (i = 0; i < numrects; ++i) {
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374 rect = &rects[i];
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375 printf ("(%d,%d-%d,%d)", rect->x, rect->y, rect->w, rect->h);
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376 aa_renderpalette (AA_context, AA_palette, AA_rparams,
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377 rect->x * AA_x_ratio, rect->y * AA_y_ratio,
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378 rect->w * AA_x_ratio, rect->h * AA_y_ratio);
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379 }
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380 printf ("\n");
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381 #endif
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382 SDL_mutexP (AA_mutex);
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383 aa_flush (AA_context);
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384 SDL_mutexV (AA_mutex);
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385 return;
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386 }
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387
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388 int
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389 AA_SetColors (_THIS, int firstcolor, int ncolors, SDL_Color * colors)
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390 {
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391 int i;
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392
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393 for (i = 0; i < ncolors; i++) {
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394 aa_setpalette (AA_palette, firstcolor + i,
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395 colors[i].r >> 2, colors[i].g >> 2, colors[i].b >> 2);
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396 }
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397 return (1);
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398 }
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399
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400 /* Note: If we are terminated, this could be called in the middle of
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401 another SDL video routine -- notably UpdateRects.
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402 */
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403 void
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404 AA_VideoQuit (_THIS)
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405 {
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406 int i;
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407
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408 aa_uninitkbd (AA_context);
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409 aa_uninitmouse (AA_context);
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410
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411 /* Free video mode lists */
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412 for (i = 0; i < SDL_NUMMODES; ++i) {
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413 if (SDL_modelist[i] != NULL) {
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414 SDL_free (SDL_modelist[i]);
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415 SDL_modelist[i] = NULL;
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416 }
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417 }
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418
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419 aa_close (AA_context);
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420
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421 SDL_DestroyMutex (AA_mutex);
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422
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423 this->screen->pixels = NULL;
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424 }
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425
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426 /* vi: set ts=4 sw=4 expandtab: */