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annotate src/video/fbcon-1.3/SDL_fbvideo.c @ 3158:30f3b987fec3 gsoc2009_ps3

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created env (fbcon-1.3) and added basic files
author Martin Lowinski <martin@goldtopf.org>
date Sat, 07 Nov 2009 11:35:19 +0000
parents
children 2632b7453516
rev   line source
3158
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2009 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
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23 #include "SDL_config.h"
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24
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25 /* SDL fbcon video driver implementation based on dummy, ps3 video driver
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26 * and sourcecode of the fbcon implementation in sdl-1.2
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27 *
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28 * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
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29 * of this was cut-and-pasted from Stephane Peter's work in the AAlib
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30 * SDL video driver. Renamed to "DUMMY" by Sam Lantinga.
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31 */
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32
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33 #include "SDL_video.h"
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34 #include "../SDL_sysvideo.h"
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35
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36 #include "SDL_fbvideo.h"
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37 #include "SDL_fbevents_c.h"
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38 #include "SDL_fbrender_c.h"
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39 #include "SDL_fbmodes_c.h"
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40
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41 #include <stdio.h>
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42 #include <fcntl.h>
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43 #include <unistd.h>
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44 #include <sys/ioctl.h>
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45 #include <sys/mman.h>
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46
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47 #ifndef HAVE_GETPAGESIZE
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48 #include <asm/page.h> /* For definition of PAGE_SIZE */
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49 #endif
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50
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51 #include <linux/vt.h>
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52
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53 #define FBVID_DRIVER_NAME "fbcon"
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54
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55 /* Initialization/Query functions */
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56 static int FB_VideoInit(_THIS);
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57 static int FB_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
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58 static void FB_VideoQuit(_THIS);
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59
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60 /* bootstrap functions */
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61 static int
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62 FB_Available(void)
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63 {
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64 deprintf(1, "+FB_Available()\n");
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65 const char *envr = SDL_getenv("SDL_VIDEODRIVER");
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66 if ((envr) && (SDL_strcmp(envr, FBVID_DRIVER_NAME) == 0)) {
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67 return (1);
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68 }
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69
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70 int console = -1;
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71 /* Added check for /fb/0 (devfs) */
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72 /* but - use environment variable first... if it fails, still check defaults */
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73 int idx = 0;
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74 const char *SDL_fbdevs[4] = { NULL, "/dev/fb0", "/dev/fb/0", NULL };
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75
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76 SDL_fbdevs[0] = SDL_getenv("SDL_FBDEV");
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77 if (!SDL_fbdevs[0]) {
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78 idx++;
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79 }
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80 for (; SDL_fbdevs[idx]; idx++) {
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81 console = open(SDL_fbdevs[idx], O_RDWR, 0);
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82 if (console >= 0) {
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83 close(console);
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84 break;
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85 }
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86 }
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87 deprintf(1, "-FB_Available()\n");
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88 return (console >= 0);
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89 }
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90
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91 static void
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92 FB_DeleteDevice(SDL_VideoDevice * device)
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93 {
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94 deprintf(1, "+FB_DeleteDevice()\n");
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95 SDL_free(device->driverdata);
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96 SDL_free(device);
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97 deprintf(1, "-FB_DeleteDevice()\n");
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98 }
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99
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100 static SDL_VideoDevice *
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101 FB_CreateDevice(int devindex)
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102 {
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103 deprintf(1, "+FB_CreateDevice()\n");
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104 SDL_VideoDevice *device;
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105 SDL_VideoData *data;
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106
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107 /* Initialize all variables that we clean on shutdown */
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108 device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
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109 if (!device) {
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110 SDL_OutOfMemory();
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111 if (device) {
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112 SDL_free(device);
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113 }
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114 return (0);
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115 }
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116 data = (struct SDL_VideoData *) SDL_calloc(1, sizeof(SDL_VideoData));
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117 if (!data) {
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118 SDL_OutOfMemory();
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119 SDL_free(device);
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120 return (0);
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121 }
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122 device->driverdata = data;
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123
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124 /* Set the function pointers */
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125 device->VideoInit = FB_VideoInit;
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126 device->VideoQuit = FB_VideoQuit;
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127 device->SetDisplayMode = FB_SetDisplayMode;
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128 device->PumpEvents = FB_PumpEvents;
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129
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130 device->free = FB_DeleteDevice;
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131
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132 deprintf(1, "-FB_CreateDevice()\n");
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133 return device;
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134 }
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135
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136 VideoBootStrap FB_bootstrap = {
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137 FBVID_DRIVER_NAME, "Linux framebuffer video driver",
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138 FB_Available, FB_CreateDevice
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139 };
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140
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141 int
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142 FB_VideoInit(_THIS)
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143 {
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144 deprintf(1, "+FB_VideoInit()\n");
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145 SDL_VideoData *data = (SDL_VideoData *) _this->driverdata;
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146 SDL_DisplayMode mode;
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147 struct fb_fix_screeninfo finfo;
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148 const char *SDL_fbdev;
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149
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150 /* Initialize the library */
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151 SDL_fbdev = SDL_getenv("SDL_FBDEV");
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152 if (SDL_fbdev == NULL) {
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153 SDL_fbdev = "/dev/fb0";
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154 }
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155 data->console_fd = open(SDL_fbdev, O_RDWR, 0);
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156 if (data->console_fd < 0) {
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157 SDL_SetError("Unable to open %s", SDL_fbdev);
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158 return -1;
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159 }
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160 #if !SDL_THREADS_DISABLED
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161 /* Create the hardware surface lock mutex */
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162 data->hw_lock = SDL_CreateMutex();
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163 if (data->hw_lock == NULL) {
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164 SDL_SetError("Unable to create lock mutex");
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165 FB_VideoQuit(_this);
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166 return -1;
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167 }
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168 #endif
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169
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170 /* Get the type of video hardware */
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171 if (ioctl(data->console_fd, FBIOGET_FSCREENINFO, &finfo) < 0) {
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172 SDL_SetError("Couldn't get console hardware info");
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173 FB_VideoQuit(_this);
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174 return -1;
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175 }
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176
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177 /* Use a fake 32-bpp desktop mode */
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178 mode.format = SDL_PIXELFORMAT_RGB888;
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179 mode.w = 1024;
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180 mode.h = 768;
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181 mode.refresh_rate = 0;
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182 mode.driverdata = NULL;
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183 SDL_AddBasicVideoDisplay(&mode);
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184 SDL_AddRenderDriver(0, &SDL_FB_RenderDriver);
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185
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186 SDL_zero(mode);
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187 SDL_AddDisplayMode(0, &mode);
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188
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189 /* We're done! */
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190 deprintf(1, "-FB_VideoInit()\n");
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191 return 0;
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192 }
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193
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194 static int
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195 FB_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
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196 {
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197 deprintf(1, "+FB_SetDisplayMode()\n");
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198 deprintf(1, "-FB_SetDisplayMode()\n");
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199 return 0;
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200 }
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201
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202 void
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203 FB_VideoQuit(_THIS)
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204 {
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205 deprintf(1, "+FB_VideoQuit()\n");
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206 deprintf(1, "-FB_VideoQuit()\n");
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207 }
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208