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1187
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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
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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 #include <sys/time.h>
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29 #include <sys/mman.h>
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30 #include <sys/ioctl.h>
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31 #include <dev/wscons/wsdisplay_usl_io.h>
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32 #include <fcntl.h>
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33 #include <unistd.h>
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34 #include <stdio.h>
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35 #include <stdlib.h>
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36 #include <string.h>
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37 #include <stdarg.h>
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38 #include <errno.h>
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39
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40 #include "SDL.h"
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41 #include "SDL_error.h"
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42 #include "SDL_video.h"
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43 #include "SDL_mouse.h"
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44 #include "SDL_sysvideo.h"
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45 #include "SDL_pixels_c.h"
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46 #include "SDL_events_c.h"
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47
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48 #include "SDL_wsconsvideo.h"
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49 #include "SDL_wsconsevents_c.h"
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50 #include "SDL_wsconsmouse_c.h"
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51
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52 #define WSCONSVID_DRIVER_NAME "wscons"
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53 enum {
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54 WSCONS_ROTATE_NONE = 0,
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55 WSCONS_ROTATE_CCW = 90,
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56 WSCONS_ROTATE_UD = 180,
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57 WSCONS_ROTATE_CW = 270
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58 };
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59
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60 #define min(a,b) ((a)<(b)?(a):(b))
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61
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62 /* Initialization/Query functions */
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63 static int WSCONS_VideoInit(_THIS, SDL_PixelFormat *vformat);
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64 static SDL_Rect **WSCONS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
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65 static SDL_Surface *WSCONS_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
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66 static int WSCONS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
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67 static void WSCONS_VideoQuit(_THIS);
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68
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69 /* Hardware surface functions */
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70 static int WSCONS_AllocHWSurface(_THIS, SDL_Surface *surface);
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71 static int WSCONS_LockHWSurface(_THIS, SDL_Surface *surface);
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72 static void WSCONS_UnlockHWSurface(_THIS, SDL_Surface *surface);
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73 static void WSCONS_FreeHWSurface(_THIS, SDL_Surface *surface);
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74
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75 /* etc. */
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76 static WSCONS_bitBlit WSCONS_blit16;
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77 static WSCONS_bitBlit WSCONS_blit16blocked;
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78 static void WSCONS_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
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79
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80 void WSCONS_ReportError(char *fmt, ...)
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81 {
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82 char message[200];
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83
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84 message[199] = '\0';
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85
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86 va_list vaArgs;
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87 va_start(vaArgs, fmt);
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88 vsnprintf(message, 199, fmt, vaArgs);
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89 va_end(vaArgs);
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90
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91 SDL_SetError(message);
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92 fprintf(stderr, "WSCONS error: %s\n", message);
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93 }
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94
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95 /* WSCONS driver bootstrap functions */
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96
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97 static int WSCONS_Available(void)
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98 {
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99 return 1;
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100 }
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101
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102 static void WSCONS_DeleteDevice(SDL_VideoDevice *device)
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103 {
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104 free(device->hidden);
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105 free(device);
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106 }
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107
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108 static SDL_VideoDevice *WSCONS_CreateDevice(int devindex)
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109 {
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110 SDL_VideoDevice *device;
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111
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112 /* Initialize all variables that we clean on shutdown */
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113 device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
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114 if (device == NULL) {
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115 SDL_OutOfMemory();
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116 return 0;
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117 }
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118 memset(device, 0, (sizeof *device));
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119 device->hidden =
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120 (struct SDL_PrivateVideoData *)malloc((sizeof *device->hidden));
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121 if (device->hidden == NULL) {
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122 SDL_OutOfMemory();
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123 free(device);
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124 return(0);
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125 }
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126 memset(device->hidden, 0, (sizeof *device->hidden));
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127 device->hidden->fd = -1;
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128
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129 /* Set the function pointers */
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130 device->VideoInit = WSCONS_VideoInit;
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131 device->ListModes = WSCONS_ListModes;
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132 device->SetVideoMode = WSCONS_SetVideoMode;
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133 device->SetColors = WSCONS_SetColors;
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134 device->UpdateRects = WSCONS_UpdateRects;
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135 device->VideoQuit = WSCONS_VideoQuit;
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136 device->AllocHWSurface = WSCONS_AllocHWSurface;
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137 device->LockHWSurface = WSCONS_LockHWSurface;
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138 device->UnlockHWSurface = WSCONS_UnlockHWSurface;
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139 device->FreeHWSurface = WSCONS_FreeHWSurface;
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140 device->InitOSKeymap = WSCONS_InitOSKeymap;
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141 device->PumpEvents = WSCONS_PumpEvents;
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142 device->free = WSCONS_DeleteDevice;
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143
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144 return device;
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145 }
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146
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147 VideoBootStrap WSCONS_bootstrap = {
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148 WSCONSVID_DRIVER_NAME,
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149 "SDL wscons video driver",
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150 WSCONS_Available,
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151 WSCONS_CreateDevice
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152 };
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153
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154 #define WSCONSDEV_FORMAT "/dev/ttyC%01x"
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155
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156 int WSCONS_VideoInit(_THIS, SDL_PixelFormat *vformat)
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157 {
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158 char devnamebuf[30];
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159 char *devname;
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160 char *rotation;
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161 int wstype;
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162 int wsmode = WSDISPLAYIO_MODE_DUMBFB;
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163 size_t len, mapsize;
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164 int pagemask;
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165 int width, height;
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166
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167 devname = getenv("SDL_WSCONSDEV");
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168 if (devname == NULL) {
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169 int activeVT;
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170 if (ioctl(STDIN_FILENO, VT_GETACTIVE, &activeVT) == -1) {
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171 WSCONS_ReportError("Unable to determine active terminal: %s",
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172 strerror(errno));
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173 return -1;
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174 }
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175 snprintf(devnamebuf, sizeof(devnamebuf), WSCONSDEV_FORMAT, activeVT - 1);
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176 devname = devnamebuf;
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177 }
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178
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179 private->fd = open(devname, O_RDWR | O_NONBLOCK, 0);
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180 if (private->fd == -1) {
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181 WSCONS_ReportError("open %s: %s", devname, strerror(errno));
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182 return -1;
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183 }
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184 if (ioctl(private->fd, WSDISPLAYIO_GINFO, &private->info) == -1) {
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185 WSCONS_ReportError("ioctl WSDISPLAY_GINFO: %s", strerror(errno));
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186 return -1;
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187 }
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188 if (ioctl(private->fd, WSDISPLAYIO_GTYPE, &wstype) == -1) {
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189 WSCONS_ReportError("ioctl WSDISPLAY_GTYPE: %s", strerror(errno));
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190 return -1;
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191 }
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192 if (ioctl(private->fd, WSDISPLAYIO_LINEBYTES, &private->physlinebytes) == -1) {
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193 WSCONS_ReportError("ioctl WSDISPLAYIO_LINEBYTES: %s", strerror(errno));
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194 return -1;
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195 }
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196 if (private->info.depth > 8) {
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197 if (wstype == WSDISPLAY_TYPE_SUN24 ||
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198 wstype == WSDISPLAY_TYPE_SUNCG12 ||
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199 wstype == WSDISPLAY_TYPE_SUNCG14 ||
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200 wstype == WSDISPLAY_TYPE_SUNTCX ||
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201 wstype == WSDISPLAY_TYPE_SUNFFB) {
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202 private->redMask = 0x0000ff;
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203 private->greenMask = 0x00ff00;
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204 private->blueMask = 0xff0000;
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205 } else if (wstype == WSDISPLAY_TYPE_PXALCD) {
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206 private->redMask = 0x1f << 11;
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207 private->greenMask = 0x3f << 5;
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208 private->blueMask = 0x1f;
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209 } else {
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210 WSCONS_ReportError("Unknown video hardware");
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211 return -1;
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212 }
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213 } else {
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214 WSCONS_ReportError("Displays with 8 bpp or less are not supported");
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215 return -1;
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216 }
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217
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218 private->rotate = WSCONS_ROTATE_NONE;
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219 rotation = getenv("SDL_VIDEO_WSCONS_ROTATION");
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220 if (rotation != NULL) {
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221 if (strlen(rotation) == 0) {
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222 private->shadowFB = 0;
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223 private->rotate = WSCONS_ROTATE_NONE;
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224 printf("Not rotating, no shadow\n");
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225 } else if (!strcmp(rotation, "NONE")) {
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226 private->shadowFB = 1;
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227 private->rotate = WSCONS_ROTATE_NONE;
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228 printf("Not rotating, but still using shadow\n");
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229 } else if (!strcmp(rotation, "CW")) {
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230 private->shadowFB = 1;
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231 private->rotate = WSCONS_ROTATE_CW;
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232 printf("Rotating screen clockwise\n");
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233 } else if (!strcmp(rotation, "CCW")) {
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234 private->shadowFB = 1;
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235 private->rotate = WSCONS_ROTATE_CCW;
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236 printf("Rotating screen counter clockwise\n");
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237 } else if (!strcmp(rotation, "UD")) {
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238 private->shadowFB = 1;
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239 private->rotate = WSCONS_ROTATE_UD;
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240 printf("Rotating screen upside down\n");
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241 } else {
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242 WSCONS_ReportError("\"%s\" is not a valid value for "
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243 "SDL_VIDEO_WSCONS_ROTATION", rotation);
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244 return -1;
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245 }
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246 }
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247
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248 switch (private->info.depth) {
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249 case 1:
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250 case 4:
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251 case 8:
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252 len = private->physlinebytes * private->info.height;
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253 break;
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254 case 16:
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255 if (private->physlinebytes == private->info.width) {
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256 len = private->info.width * private->info.height * sizeof(short);
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257 } else {
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258 len = private->physlinebytes * private->info.height;
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259 }
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260 if (private->rotate == WSCONS_ROTATE_NONE ||
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261 private->rotate == WSCONS_ROTATE_UD) {
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262 private->blitFunc = WSCONS_blit16;
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263 } else {
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264 private->blitFunc = WSCONS_blit16blocked;
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265 }
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266 break;
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267 case 32:
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268 if (private->physlinebytes == private->info.width) {
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269 len = private->info.width * private->info.height * sizeof(int);
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270 } else {
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271 len = private->physlinebytes * private->info.height;
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272 }
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273 break;
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274 default:
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275 WSCONS_ReportError("unsupported depth %d", private->info.depth);
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276 return -1;
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277 }
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278
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279 if (private->shadowFB && private->blitFunc == NULL) {
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280 WSCONS_ReportError("Using software buffer, but no blitter function is "
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281 "available for this %d bpp.", private->info.depth);
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282 return -1;
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283 }
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284
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285 if (ioctl(private->fd, WSDISPLAYIO_SMODE, &wsmode) == -1) {
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286 WSCONS_ReportError("ioctl SMODE");
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287 return -1;
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288 }
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289
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290 pagemask = getpagesize() - 1;
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291 mapsize = ((int)len + pagemask) & ~pagemask;
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292 private->physmem = (Uint8 *)mmap(NULL, mapsize,
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293 PROT_READ | PROT_WRITE, MAP_SHARED,
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294 private->fd, (off_t)0);
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295 if (private->physmem == (Uint8 *)MAP_FAILED) {
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296 private->physmem = NULL;
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297 WSCONS_ReportError("mmap: %s", strerror(errno));
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298 return -1;
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299 }
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300 private->fbmem_len = len;
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301
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302 if (private->rotate == WSCONS_ROTATE_CW ||
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303 private->rotate == WSCONS_ROTATE_CCW) {
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304 width = private->info.height;
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305 height = private->info.width;
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306 } else {
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307 width = private->info.width;
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308 height = private->info.height;
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309 }
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310
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311 if (private->shadowFB) {
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312 private->shadowmem = (Uint8 *)malloc(len);
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313 if (private->shadowmem == NULL) {
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314 WSCONS_ReportError("No memory for shadow");
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315 return -1;
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316 }
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317 private->fbstart = private->shadowmem;
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318 private->fblinebytes = width * ((private->info.depth + 7) / 8);
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319 } else {
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320 private->fbstart = private->physmem;
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321 private->fblinebytes = private->physlinebytes;
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322 }
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323
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324 private->SDL_modelist[0] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
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325 private->SDL_modelist[0]->w = width;
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326 private->SDL_modelist[0]->h = height;
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327
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328 vformat->BitsPerPixel = private->info.depth;
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329 vformat->BytesPerPixel = private->info.depth / 8;
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330
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331 if (WSCONS_InitKeyboard(this) == -1) {
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332 return -1;
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333 }
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334
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335 return 0;
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336 }
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337
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338 SDL_Rect **WSCONS_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
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339 {
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340 if (format->BitsPerPixel == private->info.depth) {
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341 return private->SDL_modelist;
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342 } else {
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343 return NULL;
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344 }
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345 }
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346
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347 SDL_Surface *WSCONS_SetVideoMode(_THIS, SDL_Surface *current,
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348 int width, int height, int bpp, Uint32 flags)
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349 {
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350 if (width != private->SDL_modelist[0]->w ||
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351 height != private->SDL_modelist[0]->h) {
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352 WSCONS_ReportError("Requested video mode %dx%d not supported.",
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353 width, height);
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354 return NULL;
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355 }
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356 if (bpp != private->info.depth) {
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357 WSCONS_ReportError("Requested video depth %d bpp not supported.", bpp);
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358 return NULL;
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359 }
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360
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361 if (!SDL_ReallocFormat(current,
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362 bpp,
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363 private->redMask,
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364 private->greenMask,
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365 private->blueMask,
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366 0)) {
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367 WSCONS_ReportError("Couldn't allocate new pixel format");
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368 return NULL;
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369 }
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370
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371 current->flags &= SDL_FULLSCREEN;
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372 if (private->shadowFB) {
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373 current->flags |= SDL_SWSURFACE;
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374 } else {
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375 current->flags |= SDL_HWSURFACE;
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376 }
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377 current->w = width;
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378 current->h = height;
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379 current->pitch = private->fblinebytes;
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380 current->pixels = private->fbstart;
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381
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382 memset(private->fbstart, 0, private->fbmem_len);
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383
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384 return current;
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385 }
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386
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387 static int WSCONS_AllocHWSurface(_THIS, SDL_Surface *surface)
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388 {
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389 return -1;
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390 }
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391 static void WSCONS_FreeHWSurface(_THIS, SDL_Surface *surface)
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392 {
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393 }
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394
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395 static int WSCONS_LockHWSurface(_THIS, SDL_Surface *surface)
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396 {
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397 return 0;
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398 }
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399
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400 static void WSCONS_UnlockHWSurface(_THIS, SDL_Surface *surface)
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401 {
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402 }
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403
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404 static void WSCONS_blit16(Uint8 *byte_src_pos,
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405 int srcRightDelta,
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406 int srcDownDelta,
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407 Uint8 *byte_dst_pos,
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408 int dst_linebytes,
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409 int width,
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410 int height)
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411 {
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412 int w;
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413 Uint16 *src_pos = (Uint16 *)byte_src_pos;
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414 Uint16 *dst_pos = (Uint16 *)byte_dst_pos;
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415
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416 while (height) {
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417 Uint16 *src = src_pos;
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418 Uint16 *dst = dst_pos;
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419 for (w = width; w != 0; w--) {
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420 *dst = *src;
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421 src += srcRightDelta;
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422 dst++;
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423 }
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424 dst_pos = (Uint16 *)((Uint8 *)dst_pos + dst_linebytes);
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425 src_pos += srcDownDelta;
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426 height--;
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427 }
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428 }
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429
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430 #define BLOCKSIZE_W 32
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431 #define BLOCKSIZE_H 32
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432
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433 static void WSCONS_blit16blocked(Uint8 *byte_src_pos,
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434 int srcRightDelta,
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435 int srcDownDelta,
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436 Uint8 *byte_dst_pos,
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437 int dst_linebytes,
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438 int width,
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439 int height)
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440 {
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441 int w;
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442 Uint16 *src_pos = (Uint16 *)byte_src_pos;
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443 Uint16 *dst_pos = (Uint16 *)byte_dst_pos;
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444
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445 while (height > 0) {
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446 Uint16 *src = src_pos;
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447 Uint16 *dst = dst_pos;
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448 for (w = width; w > 0; w -= BLOCKSIZE_W) {
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449 WSCONS_blit16((Uint8 *)src,
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450 srcRightDelta,
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451 srcDownDelta,
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452 (Uint8 *)dst,
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453 dst_linebytes,
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454 min(w, BLOCKSIZE_W),
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455 min(height, BLOCKSIZE_H));
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456 src += srcRightDelta * BLOCKSIZE_W;
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457 dst += BLOCKSIZE_W;
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458 }
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459 dst_pos = (Uint16 *)((Uint8 *)dst_pos + dst_linebytes * BLOCKSIZE_H);
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460 src_pos += srcDownDelta * BLOCKSIZE_H;
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461 height -= BLOCKSIZE_H;
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462 }
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463 }
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464
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465 static void WSCONS_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
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466 {
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467 int width = private->SDL_modelist[0]->w;
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468 int height = private->SDL_modelist[0]->h;
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469 int bytesPerPixel = (private->info.depth + 7) / 8;
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470 int i;
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471
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472 if (!private->shadowFB) {
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473 return;
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474 }
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475
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476 if (private->info.depth != 16) {
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477 WSCONS_ReportError("Shadow copy only implemented for 16 bpp");
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478 return;
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479 }
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480
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481 for (i = 0; i < numrects; i++) {
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482 int x1, y1, x2, y2;
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483 int scr_x1, scr_y1, scr_x2, scr_y2;
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484 int sha_x1, sha_y1;
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485 int shadowRightDelta; /* Address change when moving right in dest */
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486 int shadowDownDelta; /* Address change when moving down in dest */
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487 Uint8 *src_start;
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488 Uint8 *dst_start;
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489
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490 x1 = rects[i].x;
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491 y1 = rects[i].y;
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492 x2 = x1 + rects[i].w;
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493 y2 = y1 + rects[i].h;
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494
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495 if (x1 < 0) {
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496 x1 = 0;
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497 } else if (x1 > width) {
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498 x1 = width;
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499 }
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500 if (x2 < 0) {
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501 x2 = 0;
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502 } else if (x2 > width) {
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503 x2 = width;
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504 }
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505 if (y1 < 0) {
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506 y1 = 0;
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507 } else if (y1 > height) {
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508 y1 = height;
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509 }
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510 if (y2 < 0) {
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511 y2 = 0;
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512 } else if (y2 > height) {
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513 y2 = height;
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514 }
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515 if (x2 <= x1 || y2 <= y1) {
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516 continue;
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517 }
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518
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519 switch (private->rotate) {
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520 case WSCONS_ROTATE_NONE:
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521 sha_x1 = scr_x1 = x1;
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522 sha_y1 = scr_y1 = y1;
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523 scr_x2 = x2;
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524 scr_y2 = y2;
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525 shadowRightDelta = 1;
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526 shadowDownDelta = width;
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527 break;
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528 case WSCONS_ROTATE_CCW:
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529 scr_x1 = y1;
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530 scr_y1 = width - x2;
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531 scr_x2 = y2;
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532 scr_y2 = width - x1;
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533 sha_x1 = x2 - 1;
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534 sha_y1 = y1;
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535 shadowRightDelta = width;
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536 shadowDownDelta = -1;
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537 break;
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538 case WSCONS_ROTATE_UD:
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539 scr_x1 = width - x2;
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540 scr_y1 = height - y2;
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541 scr_x2 = width - x1;
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542 scr_y2 = height - y1;
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543 sha_x1 = x2 - 1;
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544 sha_y1 = y2 - 1;
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545 shadowRightDelta = -1;
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546 shadowDownDelta = -width;
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547 break;
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548 case WSCONS_ROTATE_CW:
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549 scr_x1 = height - y2;
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550 scr_y1 = x1;
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551 scr_x2 = height - y1;
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552 scr_y2 = x2;
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553 sha_x1 = x1;
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554 sha_y1 = y2 - 1;
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555 shadowRightDelta = -width;
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556 shadowDownDelta = 1;
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557 break;
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558 default:
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559 WSCONS_ReportError("Unknown rotation");
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560 return;
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561 }
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562
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563 src_start = private->shadowmem + (sha_y1 * width + sha_x1) * bytesPerPixel;
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564 dst_start = private->physmem + scr_y1 * private->physlinebytes +
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565 scr_x1 * bytesPerPixel;
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566
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567 private->blitFunc(src_start,
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568 shadowRightDelta,
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569 shadowDownDelta,
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570 dst_start,
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571 private->physlinebytes,
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572 scr_x2 - scr_x1,
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573 scr_y2 - scr_y1);
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574 }
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575 }
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576
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577 int WSCONS_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
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578 {
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579 return 0;
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580 }
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581
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582 /*
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583 * Note: If we are terminated, this could be called in the middle of
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584 * another SDL video routine -- notably UpdateRects.
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585 */
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586 void WSCONS_VideoQuit(_THIS)
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587 {
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588 int mode = WSDISPLAYIO_MODE_EMUL;
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589
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590 if (private->shadowmem != NULL) {
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591 free(private->shadowmem);
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592 private->shadowmem = NULL;
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593 }
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594 private->fbstart = NULL;
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595 if (this->screen != NULL) {
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596 this->screen->pixels = NULL;
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597 }
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598
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599 if (private->SDL_modelist[0] != NULL) {
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600 free(private->SDL_modelist[0]);
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601 private->SDL_modelist[0] = NULL;
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602 }
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603
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604 if (ioctl(private->fd, WSDISPLAYIO_SMODE, &mode) == -1) {
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605 WSCONS_ReportError("ioctl SMODE");
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606 }
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607
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608 WSCONS_ReleaseKeyboard(this);
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609
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610 if (private->fd != -1) {
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611 close(private->fd);
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612 private->fd = -1;
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613 }
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614 }
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