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 #include <pico/pico.h>
  21
  22 static void *shadow_fb;
  23
  24 const struct in_default_bind in_sdl_defbinds[] __attribute__((weak)) = {
  25         { SDLK_UP,     IN_BINDTYPE_PLAYER12, GBTN_UP },
  26         { SDLK_DOWN,   IN_BINDTYPE_PLAYER12, GBTN_DOWN },
  27         { SDLK_LEFT,   IN_BINDTYPE_PLAYER12, GBTN_LEFT },
  28         { SDLK_RIGHT,  IN_BINDTYPE_PLAYER12, GBTN_RIGHT },
  29         { SDLK_z,      IN_BINDTYPE_PLAYER12, GBTN_A },
  30         { SDLK_x,      IN_BINDTYPE_PLAYER12, GBTN_B },
  31         { SDLK_c,      IN_BINDTYPE_PLAYER12, GBTN_C },
  32         { SDLK_a,      IN_BINDTYPE_PLAYER12, GBTN_X },
  33         { SDLK_s,      IN_BINDTYPE_PLAYER12, GBTN_Y },
  34         { SDLK_d,      IN_BINDTYPE_PLAYER12, GBTN_Z },
  35         { SDLK_RETURN, IN_BINDTYPE_PLAYER12, GBTN_START },
  36         { SDLK_f,      IN_BINDTYPE_PLAYER12, GBTN_MODE },
  37         { SDLK_ESCAPE, IN_BINDTYPE_EMU, PEVB_MENU },
  38         { SDLK_F1,     IN_BINDTYPE_EMU, PEVB_STATE_SAVE },
  39         { SDLK_F2,     IN_BINDTYPE_EMU, PEVB_STATE_LOAD },
  40         { SDLK_F3,     IN_BINDTYPE_EMU, PEVB_SSLOT_PREV },
  41         { SDLK_F4,     IN_BINDTYPE_EMU, PEVB_SSLOT_NEXT },
  42         { SDLK_F5,     IN_BINDTYPE_EMU, PEVB_SWITCH_RND },
  43         { SDLK_F6,     IN_BINDTYPE_EMU, PEVB_PICO_PPREV },
  44         { SDLK_F7,     IN_BINDTYPE_EMU, PEVB_PICO_PNEXT },
  45         { SDLK_F8,     IN_BINDTYPE_EMU, PEVB_PICO_SWINP },
  46         { SDLK_BACKSPACE, IN_BINDTYPE_EMU, PEVB_FF },
  47         { 0, 0, 0 }
  48 };
  49
  50 const struct menu_keymap in_sdl_key_map[] __attribute__((weak)) =
  51 {
  52         { SDLK_UP,      PBTN_UP },
  53         { SDLK_DOWN,    PBTN_DOWN },
  54         { SDLK_LEFT,    PBTN_LEFT },
  55         { SDLK_RIGHT,   PBTN_RIGHT },
  56         { SDLK_RETURN,  PBTN_MOK },
  57         { SDLK_ESCAPE,  PBTN_MBACK },
  58         { SDLK_SEMICOLON,       PBTN_MA2 },
  59         { SDLK_QUOTE,   PBTN_MA3 },
  60         { SDLK_LEFTBRACKET,  PBTN_L },
  61         { SDLK_RIGHTBRACKET, PBTN_R },
  62 };
  63
  64 const struct menu_keymap in_sdl_joy_map[] __attribute__((weak)) =
  65 {
  66         { SDLK_UP,      PBTN_UP },
  67         { SDLK_DOWN,    PBTN_DOWN },
  68         { SDLK_LEFT,    PBTN_LEFT },
  69         { SDLK_RIGHT,   PBTN_RIGHT },
  70         /* joystick */
  71         { SDLK_WORLD_0, PBTN_MOK },
  72         { SDLK_WORLD_1, PBTN_MBACK },
  73         { SDLK_WORLD_2, PBTN_MA2 },
  74         { SDLK_WORLD_3, PBTN_MA3 },
  75 };
  76
  77 extern const char * const in_sdl_key_names[] __attribute__((weak));
  78
  79 static const struct in_pdata in_sdl_platform_data = {
  80         .defbinds = in_sdl_defbinds,
  81         .key_map = in_sdl_key_map,
  82         .kmap_size = sizeof(in_sdl_key_map) / sizeof(in_sdl_key_map[0]),
  83         .joy_map = in_sdl_joy_map,
  84         .jmap_size = sizeof(in_sdl_joy_map) / sizeof(in_sdl_joy_map[0]),
  85         .key_names = in_sdl_key_names,
  86 };
  87
  88 /* YUV stuff */
  89 static int yuv_ry[32], yuv_gy[32], yuv_by[32];
  90 static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
  91
  92 void bgr_to_uyvy_init(void)
  93 {
  94   int i, v;
  95
  96   /* init yuv converter:
  97     y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
  98     y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
  99     u = (int)(8 * 0.565f * (b0 - y0)) + 128;
 100     v = (int)(8 * 0.713f * (r0 - y0)) + 128;
 101   */
 102   for (i = 0; i < 32; i++) {
 103     yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
 104     yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
 105     yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
 106   }
 107   for (i = -32; i < 32; i++) {
 108     v = (int)(8 * 0.565f * i) + 128;
 109     if (v < 0)
 110       v = 0;
 111     if (v > 255)
 112       v = 255;
 113     yuv_u[i + 32] = v;
 114     v = (int)(8 * 0.713f * i) + 128;
 115     if (v < 0)
 116       v = 0;
 117     if (v > 255)
 118       v = 255;
 119     yuv_v[i + 32] = v;
 120   }
 121 }
 122
 123 void rgb565_to_uyvy(void *d, const void *s, int pixels)
 124 {
 125   unsigned int *dst = d;
 126   const unsigned short *src = s;
 127   const unsigned char *yu = yuv_u + 32;
 128   const unsigned char *yv = yuv_v + 32;
 129   int r0, g0, b0, r1, g1, b1;
 130   int y0, y1, u, v;
 131
 132   for (; pixels > 0; src += 2, dst++, pixels -= 2)
 133   {
 134     r0 = (src[0] >> 11) & 0x1f;
 135     g0 = (src[0] >> 6) & 0x1f;
 136     b0 =  src[0] & 0x1f;
 137     r1 = (src[1] >> 11) & 0x1f;
 138     g1 = (src[1] >> 6) & 0x1f;
 139     b1 =  src[1] & 0x1f;
 140     y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
 141     y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
 142     u = yu[b0 - y0];
 143     v = yv[r0 - y0];
 144     // valid Y range seems to be 16..235
 145     y0 = 16 + 219 * y0 / 31;
 146     y1 = 16 + 219 * y1 / 31;
 147
 148     *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
 149   }
 150 }
 151
 152 void plat_video_flip(void)
 153 {
 154         if (plat_sdl_overlay != NULL) {
 155                 SDL_Rect dstrect =
 156                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 157
 158                 SDL_LockYUVOverlay(plat_sdl_overlay);
 159                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 160                                 g_screen_width * g_screen_height);
 161                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 162                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 163         }
 164         else if (plat_sdl_gl_active) {
 165                 gl_flip(shadow_fb, g_screen_width, g_screen_height);
 166         }
 167         else {
 168                 if (SDL_MUSTLOCK(plat_sdl_screen))
 169                         SDL_UnlockSurface(plat_sdl_screen);
 170                 SDL_Flip(plat_sdl_screen);
 171                 g_screen_ptr = plat_sdl_screen->pixels;
 172                 PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 173         }
 174 }
 175
 176 void plat_video_wait_vsync(void)
 177 {
 178 }
 179
 180 void plat_video_menu_enter(int is_rom_loaded)
 181 {
 182         plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
 183         g_screen_ptr = shadow_fb;
 184 }
 185
 186 void plat_video_menu_begin(void)
 187 {
 188         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 189                 g_menuscreen_ptr = shadow_fb;
 190         }
 191         else {
 192                 if (SDL_MUSTLOCK(plat_sdl_screen))
 193                         SDL_LockSurface(plat_sdl_screen);
 194                 g_menuscreen_ptr = plat_sdl_screen->pixels;
 195         }
 196 }
 197
 198 void plat_video_menu_end(void)
 199 {
 200         if (plat_sdl_overlay != NULL) {
 201                 SDL_Rect dstrect =
 202                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 203
 204                 SDL_LockYUVOverlay(plat_sdl_overlay);
 205                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 206                                 g_menuscreen_w * g_menuscreen_h);
 207                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 208
 209                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 210         }
 211         else if (plat_sdl_gl_active) {
 212                 gl_flip(g_menuscreen_ptr, g_menuscreen_w, g_menuscreen_h);
 213         }
 214         else {
 215                 if (SDL_MUSTLOCK(plat_sdl_screen))
 216                         SDL_UnlockSurface(plat_sdl_screen);
 217                 SDL_Flip(plat_sdl_screen);
 218         }
 219         g_menuscreen_ptr = NULL;
 220
 221 }
 222
 223 void plat_video_menu_leave(void)
 224 {
 225 }
 226
 227 void plat_video_loop_prepare(void)
 228 {
 229         plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);
 230
 231         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 232                 g_screen_ptr = shadow_fb;
 233         }
 234         else {
 235                 if (SDL_MUSTLOCK(plat_sdl_screen))
 236                         SDL_LockSurface(plat_sdl_screen);
 237                 g_screen_ptr = plat_sdl_screen->pixels;
 238         }
 239         PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 240 }
 241
 242 void plat_early_init(void)
 243 {
 244 }
 245
 246 static void plat_sdl_quit(void)
 247 {
 248         // for now..
 249         exit(1);
 250 }
 251
 252 void plat_init(void)
 253 {
 254         int shadow_size;
 255         int ret;
 256
 257         ret = plat_sdl_init();
 258         if (ret != 0)
 259                 exit(1);
 260
 261         plat_sdl_quit_cb = plat_sdl_quit;
 262
 263         SDL_WM_SetCaption("PicoDrive " VERSION, NULL);
 264
 265         g_menuscreen_w = plat_sdl_screen->w;
 266         g_menuscreen_h = plat_sdl_screen->h;
 267         g_menuscreen_ptr = NULL;
 268
 269         shadow_size = g_menuscreen_w * g_menuscreen_h * 2;
 270         if (shadow_size < 320 * 480 * 2)
 271                 shadow_size = 320 * 480 * 2;
 272
 273         shadow_fb = malloc(shadow_size);
 274         g_menubg_ptr = malloc(shadow_size);
 275         if (shadow_fb == NULL || g_menubg_ptr == NULL) {
 276                 fprintf(stderr, "OOM\n");
 277                 exit(1);
 278         }
 279
 280         g_screen_width = 320;
 281         g_screen_height = 240;
 282         g_screen_ptr = shadow_fb;
 283
 284         in_sdl_init(&in_sdl_platform_data, plat_sdl_event_handler);
 285         in_probe();
 286
 287         bgr_to_uyvy_init();
 288 }
 289
 290 void plat_finish(void)
 291 {
 292         free(shadow_fb);
 293         shadow_fb = NULL;
 294         free(g_menubg_ptr);
 295         g_menubg_ptr = NULL;
 296         plat_sdl_finish();
 297 }