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 static const struct in_default_bind in_sdl_defbinds[] = {
  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 /* YUV stuff */
  49 static int yuv_ry[32], yuv_gy[32], yuv_by[32];
  50 static unsigned char yuv_u[32 * 2], yuv_v[32 * 2];
  51
  52 void bgr_to_uyvy_init(void)
  53 {
  54   int i, v;
  55
  56   /* init yuv converter:
  57     y0 = (int)((0.299f * r0) + (0.587f * g0) + (0.114f * b0));
  58     y1 = (int)((0.299f * r1) + (0.587f * g1) + (0.114f * b1));
  59     u = (int)(8 * 0.565f * (b0 - y0)) + 128;
  60     v = (int)(8 * 0.713f * (r0 - y0)) + 128;
  61   */
  62   for (i = 0; i < 32; i++) {
  63     yuv_ry[i] = (int)(0.299f * i * 65536.0f + 0.5f);
  64     yuv_gy[i] = (int)(0.587f * i * 65536.0f + 0.5f);
  65     yuv_by[i] = (int)(0.114f * i * 65536.0f + 0.5f);
  66   }
  67   for (i = -32; i < 32; i++) {
  68     v = (int)(8 * 0.565f * i) + 128;
  69     if (v < 0)
  70       v = 0;
  71     if (v > 255)
  72       v = 255;
  73     yuv_u[i + 32] = v;
  74     v = (int)(8 * 0.713f * i) + 128;
  75     if (v < 0)
  76       v = 0;
  77     if (v > 255)
  78       v = 255;
  79     yuv_v[i + 32] = v;
  80   }
  81 }
  82
  83 void rgb565_to_uyvy(void *d, const void *s, int pixels)
  84 {
  85   unsigned int *dst = d;
  86   const unsigned short *src = s;
  87   const unsigned char *yu = yuv_u + 32;
  88   const unsigned char *yv = yuv_v + 32;
  89   int r0, g0, b0, r1, g1, b1;
  90   int y0, y1, u, v;
  91
  92   for (; pixels > 0; src += 2, dst++, pixels -= 2)
  93   {
  94     r0 = (src[0] >> 11) & 0x1f;
  95     g0 = (src[0] >> 6) & 0x1f;
  96     b0 =  src[0] & 0x1f;
  97     r1 = (src[1] >> 11) & 0x1f;
  98     g1 = (src[1] >> 6) & 0x1f;
  99     b1 =  src[1] & 0x1f;
 100     y0 = (yuv_ry[r0] + yuv_gy[g0] + yuv_by[b0]) >> 16;
 101     y1 = (yuv_ry[r1] + yuv_gy[g1] + yuv_by[b1]) >> 16;
 102     u = yu[b0 - y0];
 103     v = yv[r0 - y0];
 104     // valid Y range seems to be 16..235
 105     y0 = 16 + 219 * y0 / 31;
 106     y1 = 16 + 219 * y1 / 31;
 107
 108     *dst = (y1 << 24) | (v << 16) | (y0 << 8) | u;
 109   }
 110 }
 111
 112 void plat_video_flip(void)
 113 {
 114         if (plat_sdl_overlay != NULL) {
 115                 SDL_Rect dstrect =
 116                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 117
 118                 SDL_LockYUVOverlay(plat_sdl_overlay);
 119                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 120                                 g_screen_width * g_screen_height);
 121                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 122                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 123         }
 124         else if (plat_sdl_gl_active) {
 125                 gl_flip(shadow_fb, g_screen_width, g_screen_height);
 126         }
 127         else {
 128                 // XXX: no locking, but should be fine with SDL_SWSURFACE?
 129                 SDL_Flip(plat_sdl_screen);
 130                 g_screen_ptr = plat_sdl_screen->pixels;
 131         }
 132 }
 133
 134 void plat_video_wait_vsync(void)
 135 {
 136 }
 137
 138 void plat_video_menu_enter(int is_rom_loaded)
 139 {
 140         plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 0);
 141         g_screen_ptr = shadow_fb;
 142 }
 143
 144 void plat_video_menu_begin(void)
 145 {
 146         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 147                 g_menuscreen_ptr = shadow_fb;
 148         }
 149         else {
 150                 SDL_LockSurface(plat_sdl_screen);
 151                 g_menuscreen_ptr = plat_sdl_screen->pixels;
 152         }
 153 }
 154
 155 void plat_video_menu_end(void)
 156 {
 157         if (plat_sdl_overlay != NULL) {
 158                 SDL_Rect dstrect =
 159                         { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
 160
 161                 SDL_LockYUVOverlay(plat_sdl_overlay);
 162                 rgb565_to_uyvy(plat_sdl_overlay->pixels[0], shadow_fb,
 163                                 g_menuscreen_w * g_menuscreen_h);
 164                 SDL_UnlockYUVOverlay(plat_sdl_overlay);
 165
 166                 SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
 167         }
 168         else if (plat_sdl_gl_active) {
 169                 gl_flip(g_menuscreen_ptr, g_menuscreen_w, g_menuscreen_h);
 170         }
 171         else {
 172                 SDL_UnlockSurface(plat_sdl_screen);
 173                 SDL_Flip(plat_sdl_screen);
 174         }
 175         g_menuscreen_ptr = NULL;
 176
 177 }
 178
 179 void plat_video_menu_leave(void)
 180 {
 181 }
 182
 183 void plat_video_loop_prepare(void)
 184 {
 185         plat_sdl_change_video_mode(g_screen_width, g_screen_height, 0);
 186
 187         if (plat_sdl_overlay != NULL || plat_sdl_gl_active) {
 188                 g_screen_ptr = shadow_fb;
 189         }
 190         else {
 191                 SDL_LockSurface(plat_sdl_screen);
 192                 g_screen_ptr = plat_sdl_screen->pixels;
 193         }
 194 }
 195
 196 void plat_early_init(void)
 197 {
 198 }
 199
 200 static void plat_sdl_quit(void)
 201 {
 202         // for now..
 203         exit(1);
 204 }
 205
 206 void plat_init(void)
 207 {
 208         int shadow_size;
 209         int ret;
 210
 211         ret = plat_sdl_init();
 212         if (ret != 0)
 213                 exit(1);
 214
 215         plat_sdl_quit_cb = plat_sdl_quit;
 216
 217         SDL_WM_SetCaption("PicoDrive " VERSION, NULL);
 218
 219         g_menuscreen_w = plat_sdl_screen->w;
 220         g_menuscreen_h = plat_sdl_screen->h;
 221         g_menuscreen_ptr = NULL;
 222
 223         shadow_size = g_menuscreen_w * g_menuscreen_h * 2;
 224         if (shadow_size < 320 * 480 * 2)
 225                 shadow_size = 320 * 480 * 2;
 226
 227         shadow_fb = malloc(shadow_size);
 228         g_menubg_ptr = malloc(shadow_size);
 229         if (shadow_fb == NULL || g_menubg_ptr == NULL) {
 230                 fprintf(stderr, "OOM\n");
 231                 exit(1);
 232         }
 233
 234         g_screen_width = 320;
 235         g_screen_height = 240;
 236         g_screen_ptr = shadow_fb;
 237
 238         in_sdl_init(in_sdl_defbinds, plat_sdl_event_handler);
 239         in_probe();
 240
 241         bgr_to_uyvy_init();
 242 }
 243
 244 void plat_finish(void)
 245 {
 246         free(shadow_fb);
 247         shadow_fb = NULL;
 248         free(g_menubg_ptr);
 249         g_menubg_ptr = NULL;
 250         plat_sdl_finish();
 251 }