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4315
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 2003 Sam Hocevar
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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 Hocevar
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20 sam@zoy.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: libsdl-1.2.11-libcaca.patch,v 1.1 2006/09/18 16:06:06 mr_bones_ Exp $";
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26 #endif
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27
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28 /* libcaca 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 <string.h>
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34 #include <unistd.h>
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35 #include <sys/stat.h>
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36
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37
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38 #include "SDL.h"
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39 #include "SDL_error.h"
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40 #include "SDL_video.h"
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41 #include "SDL_mouse.h"
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42 #include "../SDL_sysvideo.h"
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43 #include "../SDL_pixels_c.h"
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44 #include "../../events/SDL_events_c.h"
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45
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46 #include "SDL_cacavideo.h"
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47 #include "SDL_cacaevents_c.h"
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48
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49 #include <caca.h>
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50 #ifdef CACA_API_VERSION_1
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51 #include <caca0.h>
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52 #endif
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53
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54 /* Initialization/Query functions */
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55 static int Caca_VideoInit(_THIS, SDL_PixelFormat *vformat);
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56 static SDL_Rect **Caca_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
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57 static SDL_Surface *Caca_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
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58 static void Caca_VideoQuit(_THIS);
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59
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60 /* Hardware surface functions */
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61 static int Caca_AllocHWSurface(_THIS, SDL_Surface *surface);
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62 static int Caca_LockHWSurface(_THIS, SDL_Surface *surface);
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63 static int Caca_FlipHWSurface(_THIS, SDL_Surface *surface);
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64 static void Caca_UnlockHWSurface(_THIS, SDL_Surface *surface);
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65 static void Caca_FreeHWSurface(_THIS, SDL_Surface *surface);
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66
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67 /* Cache the VideoDevice struct */
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68 static struct SDL_VideoDevice *local_this;
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69
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70 /* libcaca driver bootstrap functions */
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71
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72 static int Caca_Available(void)
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73 {
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74 return 1; /* Always available ! */
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75 }
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76
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77 static void Caca_DeleteDevice(SDL_VideoDevice *device)
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78 {
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79 free(device->hidden);
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80 free(device);
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81 }
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82 static SDL_VideoDevice *Caca_CreateDevice(int devindex)
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83 {
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84 SDL_VideoDevice *device;
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85
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86 /* Initialize all variables that we clean on shutdown */
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87 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
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88 if ( device ) {
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89 memset(device, 0, (sizeof *device));
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90 device->hidden = (struct SDL_PrivateVideoData *)
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91 malloc((sizeof *device->hidden));
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92 }
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93 if ( (device == NULL) || (device->hidden == NULL) ) {
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94 SDL_OutOfMemory();
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95 if ( device ) {
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96 free(device);
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97 }
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98 return(0);
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99 }
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100 memset(device->hidden, 0, (sizeof *device->hidden));
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101
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102 /* Set the function pointers */
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103 device->VideoInit = Caca_VideoInit;
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104 device->ListModes = Caca_ListModes;
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105 device->SetVideoMode = Caca_SetVideoMode;
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106 device->CreateYUVOverlay = NULL;
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107 device->SetColors = NULL;
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108 device->UpdateRects = NULL;
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109 device->VideoQuit = Caca_VideoQuit;
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110 device->AllocHWSurface = Caca_AllocHWSurface;
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111 device->CheckHWBlit = NULL;
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112 device->FillHWRect = NULL;
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113 device->SetHWColorKey = NULL;
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114 device->SetHWAlpha = NULL;
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115 device->LockHWSurface = Caca_LockHWSurface;
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116 device->UnlockHWSurface = Caca_UnlockHWSurface;
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117 device->FlipHWSurface = NULL;
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118 device->FreeHWSurface = Caca_FreeHWSurface;
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119 device->SetCaption = NULL;
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120 device->SetIcon = NULL;
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121 device->IconifyWindow = NULL;
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122 device->GrabInput = NULL;
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123 device->GetWMInfo = NULL;
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124 device->InitOSKeymap = Caca_InitOSKeymap;
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125 device->PumpEvents = Caca_PumpEvents;
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126
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127 device->free = Caca_DeleteDevice;
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128
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129 return device;
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130 }
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131
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132 VideoBootStrap CACA_bootstrap = {
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133 "caca", "Color ASCII Art Library",
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134 Caca_Available, Caca_CreateDevice
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135 };
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136
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137 int Caca_VideoInit(_THIS, SDL_PixelFormat *vformat)
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138 {
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139 int i;
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140
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141 /* Initialize all variables that we clean on shutdown */
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142 for ( i=0; i<SDL_NUMMODES; ++i ) {
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143 SDL_modelist[i] = malloc(sizeof(SDL_Rect));
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144 SDL_modelist[i]->x = SDL_modelist[i]->y = 0;
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145 }
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146 /* Modes sorted largest to smallest */
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147 SDL_modelist[0]->w = 1024; SDL_modelist[0]->h = 768;
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148 SDL_modelist[1]->w = 800; SDL_modelist[1]->h = 600;
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149 SDL_modelist[2]->w = 640; SDL_modelist[2]->h = 480;
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150 SDL_modelist[3]->w = 320; SDL_modelist[3]->h = 400;
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151 SDL_modelist[4]->w = 320; SDL_modelist[4]->h = 240;
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152 SDL_modelist[5]->w = 320; SDL_modelist[5]->h = 200;
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153 SDL_modelist[6] = NULL;
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154
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155 Caca_mutex = SDL_CreateMutex();
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156
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157 /* Initialize the library */
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158 if ( caca_init() != 0 ) {
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159 SDL_SetError("Unable to initialize libcaca");
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160 return(-1);
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161 }
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162
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163 /* Initialize private variables */
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164 Caca_lastkey = 0;
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165 Caca_bitmap = NULL;
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166 Caca_buffer = NULL;
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167
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168 local_this = this;
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169
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170 /* Determine the screen depth (use default 8-bit depth) */
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171 vformat->BitsPerPixel = 8;
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172 vformat->BytesPerPixel = 1;
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173
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174 /* We're done! */
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175 return(0);
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176 }
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177
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178 SDL_Rect **Caca_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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179 {
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180 if(format->BitsPerPixel != 8)
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181 return NULL;
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182
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183 if ( flags & SDL_FULLSCREEN ) {
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184 return SDL_modelist;
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185 } else {
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186 return (SDL_Rect **) -1;
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187 }
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188 }
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189
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190 /* Various screen update functions available */
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191 static void Caca_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);
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192
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193 SDL_Surface *Caca_SetVideoMode(_THIS, SDL_Surface *current,
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194 int width, int height, int bpp, Uint32 flags)
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195 {
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196 if ( Caca_buffer ) {
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197 free( Caca_buffer );
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198 Caca_buffer = NULL;
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199 }
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200
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201 if ( Caca_bitmap ) {
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202 caca_free_bitmap( Caca_bitmap );
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203 Caca_bitmap = NULL;
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204 }
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205
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206 Caca_buffer = malloc(2 * ((width + 15) & ~15) * height);
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207 if ( ! Caca_buffer ) {
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208 SDL_SetError("Couldn't allocate buffer for requested mode");
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209 return(NULL);
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210 }
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211
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212 memset(Caca_buffer, 0, 2 * ((width + 15) & ~15) * height);
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213
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214 /* Allocate the new pixel format for the screen */
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215 if ( ! SDL_ReallocFormat(current, 16, 0xf800, 0x07e0, 0x001f, 0) ) {
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216 return(NULL);
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217 }
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218
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219 /* Set up the new mode framebuffer */
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220 current->flags = SDL_FULLSCREEN;
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221 Caca_w = current->w = width;
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222 Caca_h = current->h = height;
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223 current->pitch = 2 * ((width + 15) & ~15);
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224 current->pixels = Caca_buffer;
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225
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226 /* Create the libcaca bitmap */
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227 Caca_bitmap = caca_create_bitmap( 16, width, height, current->pitch, 0xf800, 0x07e0, 0x001f, 0x0000 );
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228 if ( ! Caca_bitmap ) {
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229 SDL_SetError("Couldn't allocate libcaca bitmap");
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230 return(NULL);
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231 }
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232
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233 /* Set the blit function */
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234 this->UpdateRects = Caca_DirectUpdate;
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235
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236 /* We're done */
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237 return(current);
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238 }
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239
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240 /* We don't actually allow hardware surfaces other than the main one */
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241 static int Caca_AllocHWSurface(_THIS, SDL_Surface *surface)
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242 {
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243 return(-1);
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244 }
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245 static void Caca_FreeHWSurface(_THIS, SDL_Surface *surface)
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246 {
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247 return;
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248 }
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249
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250 /* We need to wait for vertical retrace on page flipped displays */
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251 static int Caca_LockHWSurface(_THIS, SDL_Surface *surface)
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252 {
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253 /* TODO ? */
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254 return(0);
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255 }
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256 static void Caca_UnlockHWSurface(_THIS, SDL_Surface *surface)
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257 {
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258 return;
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259 }
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260
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261 /* FIXME: How is this done with libcaca? */
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262 static int Caca_FlipHWSurface(_THIS, SDL_Surface *surface)
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263 {
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264 SDL_mutexP(Caca_mutex);
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265 caca_refresh();
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266 SDL_mutexV(Caca_mutex);
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267 return(0);
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268 }
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269
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270 static void Caca_DirectUpdate(_THIS, int numrects, SDL_Rect *rects)
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271 {
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272 SDL_mutexP(Caca_mutex);
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273 caca_draw_bitmap( 0, 0, caca_get_width() - 1, caca_get_height() - 1,
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274 Caca_bitmap, Caca_buffer );
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275 caca_refresh();
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276 SDL_mutexV(Caca_mutex);
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277 return;
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278 }
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279
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280 /* Note: If we are terminated, this could be called in the middle of
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281 another SDL video routine -- notably UpdateRects.
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282 */
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283 void Caca_VideoQuit(_THIS)
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284 {
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285 int i;
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286
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287 /* Free video mode lists */
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288 for ( i=0; i<SDL_NUMMODES; ++i ) {
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289 if ( SDL_modelist[i] != NULL ) {
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290 free(SDL_modelist[i]);
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291 SDL_modelist[i] = NULL;
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292 }
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293 }
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294
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295 if ( Caca_bitmap ) {
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296 caca_free_bitmap( Caca_bitmap );
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297 Caca_bitmap = NULL;
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298 }
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299
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300 caca_end();
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301
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302 SDL_DestroyMutex(Caca_mutex);
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303 }
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304
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