platform/linux/gp2x.c

   1 /* faking/emulating gp2x by using xlib */
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <stdarg.h>
   6 #include <pthread.h>
   7 #include <semaphore.h>
   8
   9 #include <unistd.h>
  10 #include <sys/types.h>
  11 #include <sys/stat.h>
  12 #include <fcntl.h>
  13 #include <errno.h>
  14
  15 #include "../gp2x/version.h"
  16 #include "../common/emu.h"
  17 #include "../common/menu.h"
  18 #include "../common/readpng.h"
  19 #include "sndout_oss.h"
  20
  21 #include "log_io.h"
  22
  23 unsigned long current_keys = 0;
  24 static int current_bpp = 8;
  25 static int current_pal[256];
  26 static const char *verstring = "PicoDrive " VERSION;
  27 static int scr_changed = 0, scr_w = SCREEN_WIDTH, scr_h = SCREEN_HEIGHT;
  28 void *gp2x_screens[4];
  29
  30 // dummies
  31 int mix_32_to_16l_level;
  32 int crashed_940 = 0;
  33 int default_cpu_clock = 123;
  34 void *gp2x_memregs = NULL;
  35
  36 /* faking GP2X pad */
  37 enum  { GP2X_UP=0x1,       GP2X_LEFT=0x4,       GP2X_DOWN=0x10,  GP2X_RIGHT=0x40,
  38         GP2X_START=1<<8,   GP2X_SELECT=1<<9,    GP2X_L=1<<10,    GP2X_R=1<<11,
  39         GP2X_A=1<<12,      GP2X_B=1<<13,        GP2X_X=1<<14,    GP2X_Y=1<<15,
  40         GP2X_VOL_UP=1<<23, GP2X_VOL_DOWN=1<<22, GP2X_PUSH=1<<27 };
  41
  42 static void key_press_event(int keycode)
  43 {
  44         switch (keycode)
  45         {
  46                 case 111:
  47                 case 0x62: current_keys |= GP2X_UP;    break;
  48                 case 116:
  49                 case 0x68: current_keys |= GP2X_DOWN;  break;
  50                 case 113:
  51                 case 0x64: current_keys |= GP2X_LEFT;  break;
  52                 case 114:
  53                 case 0x66: current_keys |= GP2X_RIGHT; break;
  54                 case 0x24: current_keys |= GP2X_START; break; // enter
  55                 case 0x23: current_keys |= GP2X_SELECT;break; // ]
  56                 case 0x34: current_keys |= GP2X_A;     break; // z
  57                 case 0x35: current_keys |= GP2X_X;     break; // x
  58                 case 0x36: current_keys |= GP2X_B;     break; // c
  59                 case 0x37: current_keys |= GP2X_Y;     break; // v
  60                 case 0x27: current_keys |= GP2X_L;     break; // s
  61                 case 0x28: current_keys |= GP2X_R;     break; // d
  62                 case 0x29: current_keys |= GP2X_PUSH;  break; // f
  63                 case 0x18: current_keys |= GP2X_VOL_DOWN;break; // q
  64                 case 0x19: current_keys |= GP2X_VOL_UP;break; // w
  65                 case 0x2d: log_io_clear(); break; // k
  66                 case 0x2e: log_io_dump();  break; // l
  67                 case 0x17: { // tab
  68                         extern int PicoReset(void);
  69                         PicoReset();
  70                         break;
  71                 }
  72         }
  73 }
  74
  75 static void key_release_event(int keycode)
  76 {
  77         switch (keycode)
  78         {
  79                 case 111:
  80                 case 0x62: current_keys &= ~GP2X_UP;    break;
  81                 case 116:
  82                 case 0x68: current_keys &= ~GP2X_DOWN;  break;
  83                 case 113:
  84                 case 0x64: current_keys &= ~GP2X_LEFT;  break;
  85                 case 114:
  86                 case 0x66: current_keys &= ~GP2X_RIGHT; break;
  87                 case 0x24: current_keys &= ~GP2X_START; break; // enter
  88                 case 0x23: current_keys &= ~GP2X_SELECT;break; // ]
  89                 case 0x34: current_keys &= ~GP2X_A;     break; // z
  90                 case 0x35: current_keys &= ~GP2X_X;     break; // x
  91                 case 0x36: current_keys &= ~GP2X_B;     break; // c
  92                 case 0x37: current_keys &= ~GP2X_Y;     break; // v
  93                 case 0x27: current_keys &= ~GP2X_L;     break; // s
  94                 case 0x28: current_keys &= ~GP2X_R;     break; // d
  95                 case 0x29: current_keys &= ~GP2X_PUSH;  break; // f
  96                 case 0x18: current_keys &= ~GP2X_VOL_DOWN;break; // q
  97                 case 0x19: current_keys &= ~GP2X_VOL_UP;break; // w
  98         }
  99 }
 100
 101 /* --- */
 102
 103 #include <X11/Xlib.h>
 104 #include <X11/Xutil.h>
 105
 106 static Display *xlib_display;
 107 static Window xlib_window;
 108 static XImage *ximage;
 109
 110 static void ximage_realloc(Display *display, Visual *visual)
 111 {
 112         void *xlib_screen;
 113
 114         XLockDisplay(xlib_display);
 115
 116         if (ximage != NULL)
 117                 XDestroyImage(ximage);
 118         ximage = NULL;
 119
 120         xlib_screen = calloc(scr_w * scr_h, 4);
 121         if (xlib_screen != NULL)
 122                 ximage = XCreateImage(display, visual, 24, ZPixmap, 0,
 123                                 xlib_screen, scr_w, scr_h, 32, 0);
 124         if (ximage == NULL)
 125                 fprintf(stderr, "failed to alloc ximage\n");
 126
 127         XUnlockDisplay(xlib_display);
 128 }
 129
 130 static void xlib_update(void)
 131 {
 132         Status xstatus;
 133
 134         XLockDisplay(xlib_display);
 135
 136         xstatus = XPutImage(xlib_display, xlib_window, DefaultGC(xlib_display, 0), ximage,
 137                 0, 0, 0, 0, g_screen_width, g_screen_height);
 138         if (xstatus != 0)
 139                 fprintf(stderr, "XPutImage %d\n", xstatus);
 140
 141         XUnlockDisplay(xlib_display);
 142 }
 143
 144 static void *xlib_threadf(void *targ)
 145 {
 146         unsigned int width, height, display_width, display_height;
 147         sem_t *sem = targ;
 148         XTextProperty windowName;
 149         Window win;
 150         XEvent report;
 151         Display *display;
 152         Visual *visual;
 153         int screen;
 154
 155         XInitThreads();
 156
 157         xlib_display = display = XOpenDisplay(NULL);
 158         if (display == NULL)
 159         {
 160                 fprintf(stderr, "cannot connect to X server %s\n",
 161                                 XDisplayName(NULL));
 162                 sem_post(sem);
 163                 return NULL;
 164         }
 165
 166         visual = DefaultVisual(display, 0);
 167         if (visual->class != TrueColor)
 168         {
 169                 fprintf(stderr, "cannot handle non true color visual\n");
 170                 XCloseDisplay(display);
 171                 sem_post(sem);
 172                 return NULL;
 173         }
 174
 175         printf("X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display),
 176                 VendorRelease(display), DisplayString(display), ProtocolVersion(display),
 177                 ProtocolRevision(display));
 178
 179         screen = DefaultScreen(display);
 180
 181         ximage_realloc(display, visual);
 182         sem_post(sem);
 183
 184         display_width = DisplayWidth(display, screen);
 185         display_height = DisplayHeight(display, screen);
 186
 187         xlib_window = win = XCreateSimpleWindow(display,
 188                         RootWindow(display, screen),
 189                         display_width / 2 - scr_w / 2,
 190                         display_height / 2 - scr_h / 2,
 191                         scr_w + 2, scr_h + 2, 1,
 192                         BlackPixel(display, screen),
 193                         BlackPixel(display, screen));
 194
 195         XStringListToTextProperty((char **)&verstring, 1, &windowName);
 196         XSetWMName(display, win, &windowName);
 197
 198         XSelectInput(display, win, ExposureMask |
 199                         KeyPressMask | KeyReleaseMask |
 200                         StructureNotifyMask);
 201
 202         XMapWindow(display, win);
 203
 204         while (1)
 205         {
 206                 XNextEvent(display, &report);
 207                 switch (report.type)
 208                 {
 209                         case Expose:
 210                                 while (XCheckTypedEvent(display, Expose, &report))
 211                                         ;
 212                                 xlib_update();
 213                                 break;
 214
 215                         case ConfigureNotify:
 216                                 width = report.xconfigure.width;
 217                                 height = report.xconfigure.height;
 218                                 if (scr_w != width - 2 || scr_h != height - 2) {
 219                                         scr_w = width - 2;
 220                                         scr_h = height - 2;
 221                                         scr_changed = 1;
 222                                 }
 223                                 break;
 224
 225                         case ButtonPress:
 226                                 break;
 227
 228                         case KeyPress:
 229                                 key_press_event(report.xkey.keycode);
 230                                 break;
 231
 232                         case KeyRelease:
 233                                 key_release_event(report.xkey.keycode);
 234                                 break;
 235
 236                         default:
 237                                 break;
 238                 }
 239         }
 240 }
 241
 242 static void xlib_init(void)
 243 {
 244         pthread_t x_thread;
 245         sem_t xlib_sem;
 246
 247         sem_init(&xlib_sem, 0, 0);
 248
 249         pthread_create(&x_thread, NULL, xlib_threadf, &xlib_sem);
 250         pthread_detach(x_thread);
 251
 252         sem_wait(&xlib_sem);
 253         sem_destroy(&xlib_sem);
 254 }
 255
 256 /* --- */
 257
 258 static void realloc_screen(void)
 259 {
 260         void *old = g_screen_ptr;
 261         int i;
 262         g_screen_width = scr_w;
 263         g_screen_height = scr_h;
 264         g_screen_ptr = calloc(g_screen_width * g_screen_height * 2, 1);
 265         free(old);
 266         scr_changed = 0;
 267
 268         for (i = 0; i < 4; i++)
 269                 gp2x_screens[i] = g_screen_ptr;
 270 }
 271
 272 /* gp2x/emu.c stuff, most to be rm'd */
 273 static void gp2x_video_flip_(void)
 274 {
 275         unsigned int *image;
 276         int pixel_count, i;
 277
 278         if (ximage == NULL)
 279                 return;
 280
 281         pixel_count = g_screen_width * g_screen_height;
 282         image = (void *)ximage->data;
 283
 284         if (current_bpp == 8)
 285         {
 286                 unsigned char *pixels = g_screen_ptr;
 287                 int pix;
 288
 289                 for (i = 0; i < pixel_count; i++)
 290                 {
 291                         pix = current_pal[pixels[i]];
 292                         image[i] = pix;
 293                 }
 294         }
 295         else
 296         {
 297                 unsigned short *pixels = g_screen_ptr;
 298
 299                 for (i = 0; i < pixel_count; i++)
 300                 {
 301                         /*  in:           rrrr rggg gggb bbbb */
 302                         /* out: rrrr r000 gggg gg00 bbbb b000 */
 303                         image[i]  = (pixels[i] << 8) & 0xf80000;
 304                         image[i] |= (pixels[i] << 5) & 0x00fc00;
 305                         image[i] |= (pixels[i] << 3) & 0x0000f8;
 306                 }
 307         }
 308         xlib_update();
 309
 310         if (scr_changed) {
 311                 realloc_screen();
 312                 ximage_realloc(xlib_display, DefaultVisual(xlib_display, 0));
 313         }
 314 }
 315
 316 static void gp2x_video_changemode_ll_(int bpp)
 317 {
 318         current_bpp = bpp;
 319 }
 320
 321 static void gp2x_video_setpalette_(int *pal, int len)
 322 {
 323         memcpy(current_pal, pal, len*4);
 324 }
 325
 326 void gp2x_memcpy_all_buffers(void *data, int offset, int len)
 327 {
 328 }
 329
 330 void gp2x_memset_all_buffers(int offset, int byte, int len)
 331 {
 332         memset((char *)g_screen_ptr + offset, byte, len);
 333 }
 334
 335 void gp2x_video_changemode(int bpp)
 336 {
 337         gp2x_video_changemode_ll_(bpp);
 338 }
 339
 340 void gp2x_make_fb_bufferable(int yes)
 341 {
 342 }
 343
 344 int soc_detect(void)
 345 {
 346         return 0;
 347 }
 348
 349 /* plat */
 350 static char menu_bg_buffer[320*240*2];
 351 char cpu_clk_name[16] = "GP2X CPU clocks";
 352
 353 void plat_video_menu_enter(int is_rom_loaded)
 354 {
 355         if (is_rom_loaded)
 356         {
 357                 // darken the active framebuffer
 358                 memset(g_screen_ptr, 0, 320*8*2);
 359                 menu_darken_bg((char *)g_screen_ptr + 320*8*2, 320*224, 1);
 360                 memset((char *)g_screen_ptr + 320*232*2, 0, 320*8*2);
 361         }
 362         else
 363         {
 364                 char buff[256];
 365
 366                 // should really only happen once, on startup..
 367                 emu_make_path(buff, "skin/background.png", sizeof(buff));
 368                 if (readpng(g_screen_ptr, buff, READPNG_BG) < 0)
 369                         memset(g_screen_ptr, 0, 320*240*2);
 370         }
 371
 372         memcpy(menu_bg_buffer, g_screen_ptr, 320*240*2);
 373
 374         // switch to 16bpp
 375         gp2x_video_changemode_ll_(16);
 376         gp2x_video_flip_();
 377 }
 378
 379 void plat_video_menu_begin(void)
 380 {
 381         memcpy(g_screen_ptr, menu_bg_buffer, 320*240*2);
 382 }
 383
 384 void plat_video_menu_end(void)
 385 {
 386         gp2x_video_flip_();
 387 }
 388
 389 void plat_validate_config(void)
 390 {
 391 //      PicoOpt &= ~POPT_EXT_FM;
 392 }
 393
 394 void plat_early_init(void)
 395 {
 396 }
 397
 398 void plat_init(void)
 399 {
 400         realloc_screen();
 401         memset(g_screen_ptr, 0, g_screen_width * g_screen_height * 2);
 402
 403         // snd
 404         sndout_oss_init();
 405
 406         xlib_init();
 407 }
 408
 409 void plat_finish(void)
 410 {
 411         free(g_screen_ptr);
 412         sndout_oss_exit();
 413 }
 414
 415 /* nasty */
 416 static void do_nothing()
 417 {
 418 }
 419
 420 void *gp2x_video_flip = gp2x_video_flip_;
 421 void *gp2x_video_flip2 = gp2x_video_flip_;
 422 void *gp2x_video_changemode_ll = gp2x_video_changemode_ll_;
 423 void *gp2x_video_setpalette = gp2x_video_setpalette_;
 424
 425 void *gp2x_video_RGB_setscaling = do_nothing;
 426 void *gp2x_video_wait_vsync = do_nothing;
 427 void *gp2x_set_cpuclk = do_nothing;
 428 void *gp2x_read_battery = do_nothing;
 429 void *set_lcd_custom_rate = do_nothing;
 430 void *unset_lcd_custom_rate = do_nothing;
 431 void *set_lcd_gamma = do_nothing;
 432 void *set_ram_timings = do_nothing;
 433 void *unset_ram_timings = do_nothing;
 434
 435 /* joy */
 436 int gp2x_touchpad_read(int *x, int *y)
 437 {
 438         return -1;
 439 }
 440
 441 /* misc */
 442 void spend_cycles(int c)
 443 {
 444         usleep(c/200);
 445 }
 446
 447 int mp3_get_bitrate(FILE *f, int size)
 448 {
 449         return 128;
 450 }
 451
 452 void mp3_start_play(FILE *f, int pos)
 453 {
 454 }
 455
 456 void mp3_update(int *buffer, int length, int stereo)
 457 {
 458 }
 459
 460 /* lprintf */
 461 void lprintf(const char *fmt, ...)
 462 {
 463         va_list vl;
 464
 465         va_start(vl, fmt);
 466         vprintf(fmt, vl);
 467         va_end(vl);
 468 }
 469