platform/common/plat_sdl.c

   1 /*
   2  * PicoDrive
   3  * (C) notaz, 2013
   4  *
   5  * This work is licensed under the terms of MAME license.
   6  * See COPYING file in the top-level directory.
   7  */
   8
   9 #include <stdio.h>
  10
  11 #include "../libpicofe/input.h"
  12 #include "../libpicofe/plat_sdl.h"
  13 #include "../libpicofe/in_sdl.h"
  14 #include "../libpicofe/gl.h"
  15 #include "emu.h"
  16 #include "menu_pico.h"
  17 #include "input_pico.h"
  18 #include "version.h"
  19
  20 static void *shadow_fb;
  21
  22 const struct in_default_bind in_sdl_defbinds[] __attribute__((weak)) = {
  23         { SDLK_UP,     IN_BINDTYPE_PLAYER12, GBTN_UP },
  24         { SDLK_DOWN,   IN_BINDTYPE_PLAYER12, GBTN_DOWN },
  25         { SDLK_LEFT,   IN_BINDTYPE_PLAYER12, GBTN_LEFT },
  26         { SDLK_RIGHT,  IN_BINDTYPE_PLAYER12, GBTN_RIGHT },
  27         { SDLK_z,      IN_BINDTYPE_PLAYER12, GBTN_A },
  28         { SDLK_x,      IN_BINDTYPE_PLAYER12, GBTN_B },
  29         { SDLK_c,      IN_BINDTYPE_PLAYER12, GBTN_C },
  30         { SDLK_a,      IN_BINDTYPE_PLAYER12, GBTN_X },
  31         { SDLK_s,      IN_BINDTYPE_PLAYER12, GBTN_Y },
  32         { SDLK_d,      IN_BINDTYPE_PLAYER12, GBTN_Z },
  33         { SDLK_RETURN, IN_BINDTYPE_PLAYER12, GBTN_START },
  34         { SDLK_f,      IN_BINDTYPE_PLAYER12, GBTN_MODE },
  35         { SDLK_ESCAPE, IN_BINDTYPE_EMU, PEVB_MENU },
  36         { SDLK_F1,     IN_BINDTYPE_EMU, PEVB_STATE_SAVE },
  37         { SDLK_F2,     IN_BINDTYPE_EMU, PEVB_STATE_LOAD },
  38         { SDLK_F3,     IN_BINDTYPE_EMU, PEVB_SSLOT_PREV },
  39         { SDLK_F4,     IN_BINDTYPE_EMU, PEVB_SSLOT_NEXT },
  40         { SDLK_F5,     IN_BINDTYPE_EMU, PEVB_SWITCH_RND },
  41         { SDLK_F6,     IN_BINDTYPE_EMU, PEVB_PICO_PPREV },
  42         { SDLK_F7,     IN_BINDTYPE_EMU, PEVB_PICO_PNEXT },
  43         { SDLK_F8,     IN_BINDTYPE_EMU, PEVB_PICO_SWINP },
  44         { SDLK_BACKSPACE, IN_BINDTYPE_EMU, PEVB_FF },
  45         { 0, 0, 0 }
  46 };
  47
  48 const struct menu_keymap in_sdl_key_map[] __attribute__((weak)) =
  49 {
  50         { SDLK_UP,      PBTN_UP },
  51         { SDLK_DOWN,    PBTN_DOWN },
  52         { SDLK_LEFT,    PBTN_LEFT },
  53         { SDLK_RIGHT,   PBTN_RIGHT },
  54         { SDLK_RETURN,  PBTN_MOK },
  55         { SDLK_ESCAPE,  PBTN_MBACK },
  56         { SDLK_SEMICOLON,       PBTN_MA2 },
  57         { SDLK_QUOTE,   PBTN_MA3 },
  58         { SDLK_LEFTBRACKET,  PBTN_L },
  59         { SDLK_RIGHTBRACKET, PBTN_R },
  60 };
  61
  62 const struct menu_keymap in_sdl_joy_map[] __attribute__((weak)) =
  63 {
  64         { SDLK_UP,      PBTN_UP },
  65         { SDLK_DOWN,    PBTN_DOWN },
  66         { SDLK_LEFT,    PBTN_LEFT },
  67         { SDLK_RIGHT,   PBTN_RIGHT },
  68         /* joystick */
  69         { SDLK_WORLD_0, PBTN_MOK },
  70         { SDLK_WORLD_1, PBTN_MBACK },
  71         { SDLK_WORLD_2, PBTN_MA2 },
  72         { SDLK_WORLD_3, PBTN_MA3 },
  73 };
  74
  75 extern const char * const in_sdl_key_names[] __attribute__((weak));
  76
  77 static const struct in_pdata in_sdl_platform_data = {
  78         .defbinds = in_sdl_defbinds,
  79         .key_map = in_sdl_key_map,
  80         .kmap_size = sizeof(in_sdl_key_map) / sizeof(in_sdl_key_map[0]),
  81         .joy_map = in_sdl_joy_map,
  82         .jmap_size = sizeof(in_sdl_joy_map) / sizeof(in_sdl_joy_map[0]),
  83         .key_names = in_sdl_key_names,
  84 };
  85
  86 /* YUV stuff */
  87 static int yuv_ry[32], yuv_gy[32], yuv_by[32];
  88 static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
  89
  90 void bgr_to_uyvy_init(void)
  91 {
  92   int i, v;
  93
  94   /* init yuv converter:
  95     y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
  96     y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
  97     u = (int)(8 * 0.565f * (b0 - y0)) + 128;
  98     v = (int)(8 * 0.713f * (r0 - y0)) + 128;
  99   */
 100   for (i = 0; i < 32; i++) {
 101     yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
 102     yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
 103     yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
 104   }
 105   for (i = -32; i < 32; i++) {
 106     v = (int)(8 * 0.565f * i) + 128;
 107     if (v < 0)
 108       v = 0;
 109     if (v > 255)
 110       v = 255;
 111     yuv_u[i + 32] = v;
 112     v = (int)(8 * 0.713f * i) + 128;
 113     if (v < 0)
 114       v = 0;
 115     if (v > 255)
 116       v = 255;
 117     yuv_v[i + 32] = v;
 118   }
 119 }
 120
 121 void rgb565_to_uyvy(void *d, const void *s, int pixels)
 122 {
 123   unsigned int *dst = d;
 124   const unsigned short *src = s;
 125   const unsigned char *yu = yuv_u + 32;
 126   const unsigned char *yv = yuv_v + 32;
 127   int r0, g0, b0, r1, g1, b1;
 128   int y0, y1, u, v;
 129
 130   for (; pixels > 0; src += 2, dst++, pixels -= 2)
 131   {
 132     r0 = (src[0] >> 11) & 0x1f;
 133     g0 = (src[0] >> 6) & 0x1f;
 134     b0 =  src[0] & 0x1f;
 135     r1 = (src[1] >> 11) & 0x1f;
 136     g1 = (src[1] >> 6) & 0x1f;
 137     b1 =  src[1] & 0x1f;
 138     y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
 139     y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
 140     u = yu[b0 - y0];
 141     v = yv[r0 - y0];
 142     // valid Y range seems to be 16..235
 143     y0 = 16 + 219 * y0 / 31;
 144     y1 = 16 + 219 * y1 / 31;
 145
 146     *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
 147   }
 148 }
 149
 150 void plat_video_flip(void)
 151 {
 152         if (plat_sdl_overlay != NULL) {
 153                 SDL_Rect dstrect =
 154                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 155
 156                 SDL_LockYUVOverlay(plat_sdl_overlay);
 157                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 158                                 g_screen_width * g_screen_height);
 159                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 160                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 161         }
 162         else if (plat_sdl_gl_active) {
 163                 gl_flip(shadow_fb, g_screen_width, g_screen_height);
 164         }
 165         else {
 166                 if (SDL_MUSTLOCK(plat_sdl_screen))
 167                         SDL_UnlockSurface(plat_sdl_screen);
 168                 SDL_Flip(plat_sdl_screen);
 169                 g_screen_ptr = plat_sdl_screen->pixels;
 170                 PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 171         }
 172 }
 173
 174 void plat_video_wait_vsync(void)
 175 {
 176 }
 177
 178 void plat_video_menu_enter(int is_rom_loaded)
 179 {
 180         plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
 181         g_screen_ptr = shadow_fb;
 182 }
 183
 184 void plat_video_menu_begin(void)
 185 {
 186         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 187                 g_menuscreen_ptr = shadow_fb;
 188         }
 189         else {
 190                 if (SDL_MUSTLOCK(plat_sdl_screen))
 191                         SDL_LockSurface(plat_sdl_screen);
 192                 g_menuscreen_ptr = plat_sdl_screen->pixels;
 193         }
 194 }
 195
 196 void plat_video_menu_end(void)
 197 {
 198         if (plat_sdl_overlay != NULL) {
 199                 SDL_Rect dstrect =
 200                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 201
 202                 SDL_LockYUVOverlay(plat_sdl_overlay);
 203                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 204                                 g_menuscreen_w * g_menuscreen_h);
 205                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 206
 207                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 208         }
 209         else if (plat_sdl_gl_active) {
 210                 gl_flip(g_menuscreen_ptr, g_menuscreen_w, g_menuscreen_h);
 211         }
 212         else {
 213                 if (SDL_MUSTLOCK(plat_sdl_screen))
 214                         SDL_UnlockSurface(plat_sdl_screen);
 215                 SDL_Flip(plat_sdl_screen);
 216         }
 217         g_menuscreen_ptr = NULL;
 218
 219 }
 220
 221 void plat_video_menu_leave(void)
 222 {
 223 }
 224
 225 void plat_video_loop_prepare(void)
 226 {
 227         plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);
 228
 229         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 230                 g_screen_ptr = shadow_fb;
 231         }
 232         else {
 233                 if (SDL_MUSTLOCK(plat_sdl_screen))
 234                         SDL_LockSurface(plat_sdl_screen);
 235                 g_screen_ptr = plat_sdl_screen->pixels;
 236         }
 237         PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 238 }
 239
 240 void plat_early_init(void)
 241 {
 242 }
 243
 244 static void plat_sdl_quit(void)
 245 {
 246         // for now..
 247         exit(1);
 248 }
 249
 250 void plat_init(void)
 251 {
 252         int shadow_size;
 253         int ret;
 254
 255         ret = plat_sdl_init();
 256         if (ret != 0)
 257                 exit(1);
 258
 259         plat_sdl_quit_cb = plat_sdl_quit;
 260
 261         SDL_WM_SetCaption("PicoDrive " VERSION, NULL);
 262
 263         g_menuscreen_w = plat_sdl_screen->w;
 264         g_menuscreen_h = plat_sdl_screen->h;
 265         g_menuscreen_ptr = NULL;
 266
 267         shadow_size = g_menuscreen_w * g_menuscreen_h * 2;
 268         if (shadow_size < 320 * 480 * 2)
 269                 shadow_size = 320 * 480 * 2;
 270
 271         shadow_fb = malloc(shadow_size);
 272         g_menubg_ptr = malloc(shadow_size);
 273         if (shadow_fb == NULL || g_menubg_ptr == NULL) {
 274                 fprintf(stderr, "OOM\n");
 275                 exit(1);
 276         }
 277
 278         g_screen_width = 320;
 279         g_screen_height = 240;
 280         g_screen_ptr = shadow_fb;
 281
 282         in_sdl_init(&in_sdl_platform_data, plat_sdl_event_handler);
 283         in_probe();
 284
 285         bgr_to_uyvy_init();
 286 }
 287
 288 void plat_finish(void)
 289 {
 290         free(shadow_fb);
 291         shadow_fb = NULL;
 292         free(g_menubg_ptr);
 293         g_menubg_ptr = NULL;
 294         plat_sdl_finish();
 295 }