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 static const struct in_pdata in_sdl_platform_data = {
  76         .defbinds = in_sdl_defbinds,
  77         .key_map = in_sdl_key_map,
  78         .kmap_size = sizeof(in_sdl_key_map) / sizeof(in_sdl_key_map[0]),
  79         .joy_map = in_sdl_joy_map,
  80         .jmap_size = sizeof(in_sdl_joy_map) / sizeof(in_sdl_joy_map[0]),
  81 };
  82
  83 /* YUV stuff */
  84 static int yuv_ry[32], yuv_gy[32], yuv_by[32];
  85 static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
  86
  87 void bgr_to_uyvy_init(void)
  88 {
  89   int i, v;
  90
  91   /* init yuv converter:
  92     y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
  93     y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
  94     u = (int)(8 * 0.565f * (b0 - y0)) + 128;
  95     v = (int)(8 * 0.713f * (r0 - y0)) + 128;
  96   */
  97   for (i = 0; i < 32; i++) {
  98     yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
  99     yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
 100     yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
 101   }
 102   for (i = -32; i < 32; i++) {
 103     v = (int)(8 * 0.565f * i) + 128;
 104     if (v < 0)
 105       v = 0;
 106     if (v > 255)
 107       v = 255;
 108     yuv_u[i + 32] = v;
 109     v = (int)(8 * 0.713f * i) + 128;
 110     if (v < 0)
 111       v = 0;
 112     if (v > 255)
 113       v = 255;
 114     yuv_v[i + 32] = v;
 115   }
 116 }
 117
 118 void rgb565_to_uyvy(void *d, const void *s, int pixels)
 119 {
 120   unsigned int *dst = d;
 121   const unsigned short *src = s;
 122   const unsigned char *yu = yuv_u + 32;
 123   const unsigned char *yv = yuv_v + 32;
 124   int r0, g0, b0, r1, g1, b1;
 125   int y0, y1, u, v;
 126
 127   for (; pixels > 0; src += 2, dst++, pixels -= 2)
 128   {
 129     r0 = (src[0] >> 11) & 0x1f;
 130     g0 = (src[0] >> 6) & 0x1f;
 131     b0 =  src[0] & 0x1f;
 132     r1 = (src[1] >> 11) & 0x1f;
 133     g1 = (src[1] >> 6) & 0x1f;
 134     b1 =  src[1] & 0x1f;
 135     y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
 136     y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
 137     u = yu[b0 - y0];
 138     v = yv[r0 - y0];
 139     // valid Y range seems to be 16..235
 140     y0 = 16 + 219 * y0 / 31;
 141     y1 = 16 + 219 * y1 / 31;
 142
 143     *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
 144   }
 145 }
 146
 147 void plat_video_flip(void)
 148 {
 149         if (plat_sdl_overlay != NULL) {
 150                 SDL_Rect dstrect =
 151                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 152
 153                 SDL_LockYUVOverlay(plat_sdl_overlay);
 154                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 155                                 g_screen_width * g_screen_height);
 156                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 157                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 158         }
 159         else if (plat_sdl_gl_active) {
 160                 gl_flip(shadow_fb, g_screen_width, g_screen_height);
 161         }
 162         else {
 163                 if (SDL_MUSTLOCK(plat_sdl_screen))
 164                         SDL_UnlockSurface(plat_sdl_screen);
 165                 SDL_Flip(plat_sdl_screen);
 166                 g_screen_ptr = plat_sdl_screen->pixels;
 167                 PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 168         }
 169 }
 170
 171 void plat_video_wait_vsync(void)
 172 {
 173 }
 174
 175 void plat_video_menu_enter(int is_rom_loaded)
 176 {
 177         plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
 178         g_screen_ptr = shadow_fb;
 179 }
 180
 181 void plat_video_menu_begin(void)
 182 {
 183         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 184                 g_menuscreen_ptr = shadow_fb;
 185         }
 186         else {
 187                 if (SDL_MUSTLOCK(plat_sdl_screen))
 188                         SDL_LockSurface(plat_sdl_screen);
 189                 g_menuscreen_ptr = plat_sdl_screen->pixels;
 190         }
 191 }
 192
 193 void plat_video_menu_end(void)
 194 {
 195         if (plat_sdl_overlay != NULL) {
 196                 SDL_Rect dstrect =
 197                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 198
 199                 SDL_LockYUVOverlay(plat_sdl_overlay);
 200                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 201                                 g_menuscreen_w * g_menuscreen_h);
 202                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 203
 204                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 205         }
 206         else if (plat_sdl_gl_active) {
 207                 gl_flip(g_menuscreen_ptr, g_menuscreen_w, g_menuscreen_h);
 208         }
 209         else {
 210                 if (SDL_MUSTLOCK(plat_sdl_screen))
 211                         SDL_UnlockSurface(plat_sdl_screen);
 212                 SDL_Flip(plat_sdl_screen);
 213         }
 214         g_menuscreen_ptr = NULL;
 215
 216 }
 217
 218 void plat_video_menu_leave(void)
 219 {
 220 }
 221
 222 void plat_video_loop_prepare(void)
 223 {
 224         plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);
 225
 226         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 227                 g_screen_ptr = shadow_fb;
 228         }
 229         else {
 230                 if (SDL_MUSTLOCK(plat_sdl_screen))
 231                         SDL_LockSurface(plat_sdl_screen);
 232                 g_screen_ptr = plat_sdl_screen->pixels;
 233         }
 234         PicoDrawSetOutBuf(g_screen_ptr, g_screen_width * 2);
 235 }
 236
 237 void plat_early_init(void)
 238 {
 239 }
 240
 241 static void plat_sdl_quit(void)
 242 {
 243         // for now..
 244         exit(1);
 245 }
 246
 247 void plat_init(void)
 248 {
 249         int shadow_size;
 250         int ret;
 251
 252         ret = plat_sdl_init();
 253         if (ret != 0)
 254                 exit(1);
 255
 256         plat_sdl_quit_cb = plat_sdl_quit;
 257
 258         SDL_WM_SetCaption("PicoDrive " VERSION, NULL);
 259
 260         g_menuscreen_w = plat_sdl_screen->w;
 261         g_menuscreen_h = plat_sdl_screen->h;
 262         g_menuscreen_ptr = NULL;
 263
 264         shadow_size = g_menuscreen_w * g_menuscreen_h * 2;
 265         if (shadow_size < 320 * 480 * 2)
 266                 shadow_size = 320 * 480 * 2;
 267
 268         shadow_fb = malloc(shadow_size);
 269         g_menubg_ptr = malloc(shadow_size);
 270         if (shadow_fb == NULL || g_menubg_ptr == NULL) {
 271                 fprintf(stderr, "OOM\n");
 272                 exit(1);
 273         }
 274
 275         g_screen_width = 320;
 276         g_screen_height = 240;
 277         g_screen_ptr = shadow_fb;
 278
 279         in_sdl_init(&in_sdl_platform_data, plat_sdl_event_handler);
 280         in_probe();
 281
 282         bgr_to_uyvy_init();
 283 }
 284
 285 void plat_finish(void)
 286 {
 287         free(shadow_fb);
 288         shadow_fb = NULL;
 289         free(g_menubg_ptr);
 290         g_menubg_ptr = NULL;
 291         plat_sdl_finish();
 292 }