sdl/gfx.c

   1 /*
   2  * gfx.c
   3  * Copyright (C) 1998 Brainchild Design - http://brainchilddesign.com/
   4  *
   5  * Copyright (C) 2001 Chuck Mason <cemason@users.sourceforge.net>
   6  *
   7  * Copyright (C) 2002 Florian Schulze <crow@icculus.org>
   8  *
   9  * Portions of this code are from the MPEG software simulation group
  10  * idct implementation. This code will be replaced with a new
  11  * implementation soon.
  12  *
  13  * This file is part of Jump'n'Bump.
  14  *
  15  * Jump'n'Bump is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * Jump'n'Bump is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  28  */
  29
  30 #include "globals.h"
  31 #include "SDL_endian.h"
  32
  33 #ifdef _MSC_VER
  34     #include "jumpnbump32.xpm"
  35 #elif __APPLE__
  36     #include "jumpnbump128.xpm"
  37 #else
  38     #include "jumpnbump64.xpm"
  39 #endif
  40 SDL_Surface *icon;
  41
  42 int screen_width=400;
  43 int screen_height=256;
  44 int screen_pitch=400;
  45 int scale_up=0;
  46 int bytes_per_pixel=1;
  47 int dirty_block_shift=4;
  48
  49 static int current_pal[256];
  50 static SDL_Surface *jnb_surface;
  51 static int fullscreen = 0;
  52 static int vinited = 0;
  53 static void *screen_buffer[2];
  54 static int drawing_enable = 0;
  55 static void *background = NULL;
  56 static int background_drawn;
  57 static void *mask = NULL;
  58 static int dirty_blocks[2][25*16*2];
  59
  60 static SDL_Surface *load_xpm_from_array(char **xpm)
  61 {
  62 #define NEXT_TOKEN { \
  63         while ((*p != ' ') && (*p != '\t')) p++; \
  64         while ((*p == ' ') || (*p == '\t')) p++; }
  65
  66         SDL_Surface *surface;
  67         char *p;
  68         int width;
  69         int height;
  70         int colors;
  71         int images;
  72         int color;
  73         int pal[256];
  74         int x,y;
  75
  76         p = *xpm++;
  77
  78         width = atoi(p);
  79         if (width <= 0)
  80                 return NULL;
  81         NEXT_TOKEN;
  82
  83         height = atoi(p);
  84         if (height <= 0)
  85                 return NULL;
  86         NEXT_TOKEN;
  87
  88         colors = atoi(p);
  89         if (colors <= 0)
  90                 return NULL;
  91         NEXT_TOKEN;
  92
  93         images = atoi(p);
  94         if (images <= 0)
  95                 return NULL;
  96
  97         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
  98         if (!surface)
  99                 return NULL;
 100
 101         SDL_SetColorKey(surface, SDL_SRCCOLORKEY, SDL_MapRGBA(surface->format, 0, 0, 0, 0));
 102         while (colors--) {
 103                 p = *xpm++;
 104
 105                 color = *p++;
 106                 NEXT_TOKEN;
 107
 108                 if (*p++ != 'c') {
 109                         SDL_FreeSurface(surface);
 110                         return NULL;
 111                 }
 112                 NEXT_TOKEN;
 113
 114                 if (*p == '#')
 115                         pal[color] = strtoul(++p, NULL, 16) | 0xff000000;
 116                 else
 117                         pal[color] = 0;
 118         }
 119
 120         y = 0;
 121         while (y < height) {
 122                 int *pixels;
 123
 124                 p = *xpm++;
 125
 126                 pixels = (int *)&((char *)surface->pixels)[y++ * surface->pitch];
 127                 x = 0;
 128                 while (x < width) {
 129                         Uint8 r,g,b,a;
 130
 131                         if (*p == '\0') {
 132                                 SDL_FreeSurface(surface);
 133                                 return NULL;
 134                         }
 135                         r = (pal[(int)*p] >> 16) & 0xff;
 136                         b = (pal[(int)*p] & 0xff);
 137                         g = (pal[(int)*p] >> 8) & 0xff;
 138                         a = (pal[(int)*p] >> 24) & 0xff;
 139                         pixels[x] = SDL_MapRGBA(surface->format, r, g, b, a);
 140                         x++;
 141                         p++;
 142                 }
 143         }
 144
 145         return surface;
 146 }
 147
 148 void *get_vgaptr(int page, int x, int y)
 149 {
 150         assert(drawing_enable==1);
 151
 152         return (unsigned char *)screen_buffer[page] + (y*screen_pitch)+(x*bytes_per_pixel);
 153 }
 154
 155
 156 void set_scaling(int scale)
 157 {
 158         if (scale==1) {
 159                 screen_width=800;
 160                 screen_height=512;
 161                 scale_up=1;
 162                 bytes_per_pixel=2;
 163                 dirty_block_shift=5;
 164                 screen_pitch=screen_width*bytes_per_pixel;
 165         } else {
 166                 screen_width=400;
 167                 screen_height=256;
 168                 scale_up=0;
 169                 bytes_per_pixel=1;
 170                 dirty_block_shift=4;
 171                 screen_pitch=screen_width*bytes_per_pixel;
 172         }
 173 }
 174
 175 void open_screen(void)
 176 {
 177         int lval = 0;
 178         int bpp;
 179         int flags;
 180
 181         lval = SDL_Init(SDL_INIT_TIMER | SDL_INIT_AUDIO | SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
 182         if (lval < 0) {
 183                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 184                 exit(EXIT_FAILURE);
 185         }
 186
 187         if (scale_up)
 188                 bpp = 16;
 189         else
 190                 bpp = 8;
 191         flags = SDL_SWSURFACE;
 192         if (fullscreen)
 193                 flags |= SDL_FULLSCREEN;
 194         jnb_surface = SDL_SetVideoMode(screen_width, screen_height, bpp, flags);
 195
 196         if (!jnb_surface) {
 197                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 198                 exit(EXIT_FAILURE);
 199         }
 200
 201         if(fullscreen)
 202                 SDL_ShowCursor(0);
 203         else
 204                 SDL_ShowCursor(1);
 205
 206         SDL_WM_SetCaption("Jump n Bump","");
 207
 208         icon=load_xpm_from_array(jumpnbump_xpm);
 209         if (icon==NULL) {
 210             printf("Couldn't load icon\n");
 211         } else {
 212             SDL_WM_SetIcon(icon,NULL);
 213         }
 214
 215         vinited = 1;
 216
 217         memset(current_pal, 0, sizeof(current_pal));
 218         memset(dirty_blocks, 0, sizeof(dirty_blocks));
 219
 220         screen_buffer[0]=malloc(screen_width*screen_height*bytes_per_pixel);
 221         screen_buffer[1]=malloc(screen_width*screen_height*bytes_per_pixel);
 222
 223 /*
 224         dirty_blocks[0]=malloc(sizeof(int)*25*16+1000);
 225         dirty_blocks[1]=malloc(sizeof(int)*25*16+1000);
 226 */
 227
 228         return;
 229 }
 230
 231
 232 void fs_toggle()
 233 {
 234         if (!vinited) {
 235                 fullscreen ^= 1;
 236                 return;
 237         }
 238         if (SDL_WM_ToggleFullScreen(jnb_surface))
 239                 fullscreen ^= 1;
 240 }
 241
 242
 243 void wait_vrt(int mix)
 244 {
 245         return;
 246 }
 247
 248
 249 void clear_page(int page, int color)
 250 {
 251         int i,j;
 252
 253         assert(drawing_enable==1);
 254
 255         for (i=0; i<(25*16); i++)
 256                 dirty_blocks[page][i] = 1;
 257
 258         if (bytes_per_pixel==1) {
 259                 unsigned char *buf = get_vgaptr(page, 0, 0);
 260
 261                 for (i=0; i<screen_height; i++)
 262                         for (j=0; j<screen_width; j++)
 263                                 *buf++ = color;
 264         } else if (bytes_per_pixel==2) {
 265                 unsigned short *buf = get_vgaptr(page, 0, 0);
 266
 267                 for (i=0; i<screen_height; i++)
 268                         for (j=0; j<screen_width; j++)
 269                                 *buf++ = color;
 270         } else {
 271                 unsigned int *buf = get_vgaptr(page, 0, 0);
 272
 273                 for (i=0; i<screen_height; i++)
 274                         for (j=0; j<screen_width; j++)
 275                                 *buf++ = color;
 276         }
 277 }
 278
 279
 280 void clear_lines(int page, int y, int count, int color)
 281 {
 282         int i,j;
 283
 284         assert(drawing_enable==1);
 285
 286         if (scale_up) {
 287                 count *= 2;
 288                 y *= 2;
 289         }
 290
 291         if (bytes_per_pixel==1) {
 292                 for (i=0; i<count; i++) {
 293                         if ((i+y)<screen_height) {
 294                                 unsigned char *buf = get_vgaptr(page, 0, i+y);
 295                                 for (j=0; j<screen_width; j++)
 296                                         *buf++ = color;
 297                         }
 298                 }
 299         } else if (bytes_per_pixel==2) {
 300                 for (i=0; i<count; i++) {
 301                         if ((i+y)<screen_height) {
 302                                 unsigned short *buf = get_vgaptr(page, 0, i+y);
 303                                 for (j=0; j<screen_width; j++)
 304                                         *buf++ = color;
 305                         }
 306                 }
 307         } else {
 308                 for (i=0; i<count; i++) {
 309                         if ((i+y)<screen_height) {
 310                                 unsigned int *buf = get_vgaptr(page, 0, i+y);
 311                                 for (j=0; j<screen_width; j++)
 312                                         *buf++ = color;
 313                         }
 314                 }
 315         }
 316         count = ((y+count)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 317         y >>= dirty_block_shift;
 318         for (i=0; i<count; i++)
 319                 for (j=0; j<25; j++)
 320                         dirty_blocks[page][(y+i)*25+j] = 1;
 321 }
 322
 323
 324 int get_color(int color, char pal[768])
 325 {
 326         assert(color<256);
 327         assert(pal);
 328         return SDL_MapRGB(jnb_surface->format, (Uint8)(pal[color*3+0]<<2), (Uint8)(pal[color*3+1]<<2), (Uint8)(pal[color*3+2]<<2));
 329 }
 330
 331
 332 int get_pixel(int page, int x, int y)
 333 {
 334         assert(drawing_enable==1);
 335
 336         if (scale_up) {
 337                 x *= 2;
 338                 y *= 2;
 339         }
 340
 341         assert(x<screen_width);
 342         assert(y<screen_height);
 343
 344         if (bytes_per_pixel==1)
 345                 return *(unsigned char *)get_vgaptr(page, x, y);
 346         else if (bytes_per_pixel==2)
 347                 return *(unsigned short *)get_vgaptr(page, x, y);
 348         else
 349                 return *(unsigned int *)get_vgaptr(page, x, y);
 350 }
 351
 352
 353 void set_pixel(int page, int x, int y, int color)
 354 {
 355         assert(drawing_enable==1);
 356
 357         if (scale_up) {
 358                 x *= 2;
 359                 y *= 2;
 360         }
 361
 362         assert(x<screen_width);
 363         assert(y<screen_height);
 364
 365         dirty_blocks[page][(y>>dirty_block_shift)*25+(x>>dirty_block_shift)] = 1;
 366
 367         if (bytes_per_pixel==1)
 368                 *(unsigned char *)get_vgaptr(page, x, y) = color;
 369         else if (bytes_per_pixel==2)
 370                 *(unsigned short *)get_vgaptr(page, x, y) = color;
 371         else
 372                 *(unsigned int *)get_vgaptr(page, x, y) = color;
 373 }
 374
 375
 376 static unsigned int colorMask = 0xF7DEF7DE;
 377 static unsigned int lowPixelMask = 0x08210821;
 378 static unsigned int qcolorMask = 0xE79CE79C;
 379 static unsigned int qlowpixelMask = 0x18631863;
 380 static unsigned int redblueMask = 0xF81F;
 381 static unsigned int greenMask = 0x7E0;
 382
 383 int Init_2xSaI (unsigned int BitFormat)
 384 {
 385     if (BitFormat == 565)
 386     {
 387         colorMask = (0xF7DEF7DE);
 388         lowPixelMask = (0x08210821);
 389         qcolorMask = (0xE79CE79C);
 390         qlowpixelMask = (0x18631863);
 391         redblueMask = (0xF81F);
 392         greenMask = (0x7E0);
 393     }
 394     else if (BitFormat == 555)
 395     {
 396         colorMask = (0x7BDE7BDE);
 397         lowPixelMask = (0x04210421);
 398         qcolorMask = (0x739C739C);
 399         qlowpixelMask = (0x0C630C63);
 400         redblueMask = (0x7C1F);
 401         greenMask = (0x3E0);
 402     }
 403     else
 404     {
 405         return 0;
 406     }
 407
 408 #ifdef MMX
 409     Init_2xSaIMMX (BitFormat);
 410 #endif
 411
 412     return 1;
 413 }
 414
 415
 416 void Scale2x (unsigned char *src, unsigned int src_pitch, int src_bytes_per_pixel,
 417                  unsigned char *dst, unsigned int dst_pitch, int dst_bytes_per_pixel,
 418                  int width, int height, int pal[256])
 419 {
 420 #define GET_COLOR(x) (pal[(x)])
 421
 422         int x,y;
 423         unsigned char *src_line;
 424         unsigned char *dst_line[2];
 425
 426         src_line = src;
 427         dst_line[0] = dst;
 428         dst_line[1] = dst + dst_pitch;
 429         for (y=0; y<height; y++) {
 430                 for (x=0; x<width; x++) {
 431                         int color;
 432
 433                         if (src_bytes_per_pixel == 1) {
 434                                 color = GET_COLOR(*(((unsigned char*)src_line) + x));
 435                         } else if (src_bytes_per_pixel == 2) {
 436                                 color = *(((unsigned short*)src_line) + x);
 437                         } else {
 438                                 color = *(((unsigned int*)src_line) + x);
 439                         }
 440
 441                         if (dst_bytes_per_pixel == 2) {
 442                                 *((unsigned long *) (&dst_line[0][x * 4])) = color | (color << 16);
 443                                 *((unsigned long *) (&dst_line[1][x * 4])) = color | (color << 16);
 444                         } else {
 445                                 *((unsigned long *) (&dst_line[0][x * 8])) = color;
 446                                 *((unsigned long *) (&dst_line[0][x * 8 + 4])) = color;
 447                                 *((unsigned long *) (&dst_line[1][x * 8])) = color;
 448                                 *((unsigned long *) (&dst_line[1][x * 8 + 4])) = color;
 449                         }
 450                 }
 451
 452                 src_line += src_pitch;
 453
 454                 if (y < height - 1) {
 455                         dst_line[0] += dst_pitch * 2;
 456                         dst_line[1] += dst_pitch * 2;
 457                 }
 458         }
 459 }
 460
 461
 462 void Super2xSaI (unsigned char *src, unsigned int src_pitch, int src_bytes_per_pixel,
 463                  unsigned char *dst, unsigned int dst_pitch, int dst_bytes_per_pixel,
 464                  int width, int height, int pal[256])
 465 {
 466 #define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
 467
 468 #define INTERPOLATE(A, B) (((A & colorMask) >> 1) + ((B & colorMask) >> 1) + (A & B & lowPixelMask))
 469
 470 #define Q_INTERPOLATE(A, B, C, D) ((A & qcolorMask) >> 2) + ((B & qcolorMask) >> 2) + ((C & qcolorMask) >> 2) + ((D & qcolorMask) >> 2) \
 471         + ((((A & qlowpixelMask) + (B & qlowpixelMask) + (C & qlowpixelMask) + (D & qlowpixelMask)) >> 2) & qlowpixelMask)
 472
 473 #define GET_COLOR(x) (pal[(x)])
 474
 475         unsigned char *src_line[4];
 476         unsigned char *dst_line[2];
 477         int x, y;
 478         unsigned long color[16];
 479
 480         if ( (width<2) || (height<2) ) {
 481                 Scale2x(src, src_pitch, src_bytes_per_pixel, dst, dst_pitch, dst_bytes_per_pixel, width, height, pal);
 482                 return;
 483         }
 484
 485         /* Point to the first 3 lines. */
 486         src_line[0] = src;
 487         src_line[1] = src;
 488         src_line[2] = src + src_pitch;
 489         src_line[3] = src + (src_pitch * 2);
 490
 491         dst_line[0] = dst;
 492         dst_line[1] = dst + dst_pitch;
 493
 494         x = 0, y = 0;
 495
 496         if (src_bytes_per_pixel == 1) {
 497                 unsigned char *sbp;
 498                 sbp = src_line[0];
 499                 color[0] = GET_COLOR(*sbp);       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 500                 color[4] = color[0];   color[5] = color[0];   color[6] = GET_COLOR(*(sbp + 1));  color[7] = GET_COLOR(*(sbp + 2));
 501                 sbp = src_line[2];
 502                 color[8] = GET_COLOR(*sbp);     color[9] = color[8];     color[10] = GET_COLOR(*(sbp + 1)); color[11] = GET_COLOR(*(sbp + 2));
 503                 sbp = src_line[3];
 504                 color[12] = GET_COLOR(*sbp);    color[13] = color[12];   color[14] = GET_COLOR(*(sbp + 1)); color[15] = GET_COLOR(*(sbp + 2));
 505         } else if (src_bytes_per_pixel == 2) {
 506                 unsigned short *sbp;
 507                 sbp = (unsigned short*)src_line[0];
 508                 color[0] = *sbp;       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 509                 color[4] = color[0];   color[5] = color[0];   color[6] = *(sbp + 1);  color[7] = *(sbp + 2);
 510                 sbp = (unsigned short*)src_line[2];
 511                 color[8] = *sbp;     color[9] = color[8];     color[10] = *(sbp + 1); color[11] = *(sbp + 2);
 512                 sbp = (unsigned short*)src_line[3];
 513                 color[12] = *sbp;    color[13] = color[12];   color[14] = *(sbp + 1); color[15] = *(sbp + 2);
 514         } else {
 515                 unsigned long *lbp;
 516                 lbp = (unsigned long*)src_line[0];
 517                 color[0] = *lbp;       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 518                 color[4] = color[0];   color[5] = color[0];   color[6] = *(lbp + 1);  color[7] = *(lbp + 2);
 519                 lbp = (unsigned long*)src_line[2];
 520                 color[8] = *lbp;     color[9] = color[8];     color[10] = *(lbp + 1); color[11] = *(lbp + 2);
 521                 lbp = (unsigned long*)src_line[3];
 522                 color[12] = *lbp;    color[13] = color[12];   color[14] = *(lbp + 1); color[15] = *(lbp + 2);
 523         }
 524
 525         for (y = 0; y < height; y++) {
 526
 527                 /* Todo: x = width - 2, x = width - 1 */
 528
 529                 for (x = 0; x < width; x++) {
 530                         unsigned long product1a, product1b, product2a, product2b;
 531
 532 /*
 533
 534 //---------------------------------------  B0 B1 B2 B3    0  1  2  3
 535 //                                         4  5* 6  S2 -> 4  5* 6  7
 536 //                                         1  2  3  S1    8  9 10 11
 537 //                                         A0 A1 A2 A3   12 13 14 15
 538 //--------------------------------------
 539
 540 */
 541
 542                         if (color[9] == color[6] && color[5] != color[10]) {
 543                                 product2b = color[9];
 544                                 product1b = product2b;
 545                         }
 546                         else if (color[5] == color[10] && color[9] != color[6]) {
 547                                 product2b = color[5];
 548                                 product1b = product2b;
 549                         }
 550                         else if (color[5] == color[10] && color[9] == color[6]) {
 551                                 int r = 0;
 552
 553                                 r += GET_RESULT(color[6], color[5], color[8], color[13]);
 554                                 r += GET_RESULT(color[6], color[5], color[4], color[1]);
 555                                 r += GET_RESULT(color[6], color[5], color[14], color[11]);
 556                                 r += GET_RESULT(color[6], color[5], color[2], color[7]);
 557
 558                                 if (r > 0)
 559                                         product1b = color[6];
 560                                 else if (r < 0)
 561                                         product1b = color[5];
 562                                 else
 563                                         product1b = INTERPOLATE(color[5], color[6]);
 564
 565                                 product2b = product1b;
 566
 567                         }
 568                         else {
 569                                 if (color[6] == color[10] && color[10] == color[13] && color[9] != color[14] && color[10] != color[12])
 570                                         product2b = Q_INTERPOLATE(color[10], color[10], color[10], color[9]);
 571                                 else if (color[5] == color[9] && color[9] == color[14] && color[13] != color[10] && color[9] != color[15])
 572                                         product2b = Q_INTERPOLATE(color[9], color[9], color[9], color[10]);
 573                                 else
 574                                         product2b = INTERPOLATE(color[9], color[10]);
 575
 576                                 if (color[6] == color[10] && color[6] == color[1] && color[5] != color[2] && color[6] != color[0])
 577                                         product1b = Q_INTERPOLATE(color[6], color[6], color[6], color[5]);
 578                                 else if (color[5] == color[9] && color[5] == color[2] && color[1] != color[6] && color[5] != color[3])
 579                                         product1b = Q_INTERPOLATE(color[6], color[5], color[5], color[5]);
 580                                 else
 581                                         product1b = INTERPOLATE(color[5], color[6]);
 582                         }
 583
 584                         if (color[5] == color[10] && color[9] != color[6] && color[4] == color[5] && color[5] != color[14])
 585                                 product2a = INTERPOLATE(color[9], color[5]);
 586                         else if (color[5] == color[8] && color[6] == color[5] && color[4] != color[9] && color[5] != color[12])
 587                                 product2a = INTERPOLATE(color[9], color[5]);
 588                         else
 589                                 product2a = color[9];
 590
 591                         if (color[9] == color[6] && color[5] != color[10] && color[8] == color[9] && color[9] != color[2])
 592                                 product1a = INTERPOLATE(color[9], color[5]);
 593                         else if (color[4] == color[9] && color[10] == color[9] && color[8] != color[5] && color[9] != color[0])
 594                                 product1a = INTERPOLATE(color[9], color[5]);
 595                         else
 596                                 product1a = color[5];
 597
 598                         if (dst_bytes_per_pixel == 2) {
 599                                 unsigned long tmp;
 600                                 tmp = SDL_SwapLE16(product1a) | SDL_SwapLE16(product1b) << 16;
 601                                 *((unsigned long *) (&dst_line[0][x * 4])) = SDL_SwapLE32(tmp);
 602                                 tmp = SDL_SwapLE16(product2a) | SDL_SwapLE16(product2b) << 16;
 603                                 *((unsigned long *) (&dst_line[1][x * 4])) = SDL_SwapLE32(tmp);
 604                         } else {
 605                                 *((unsigned long *) (&dst_line[0][x * 8])) = product1a;
 606                                 *((unsigned long *) (&dst_line[0][x * 8 + 4])) = product1b;
 607                                 *((unsigned long *) (&dst_line[1][x * 8])) = product2a;
 608                                 *((unsigned long *) (&dst_line[1][x * 8 + 4])) = product2b;
 609                         }
 610
 611                         /* Move color matrix forward */
 612                         color[0] = color[1]; color[4] = color[5]; color[8] = color[9];   color[12] = color[13];
 613                         color[1] = color[2]; color[5] = color[6]; color[9] = color[10];  color[13] = color[14];
 614                         color[2] = color[3]; color[6] = color[7]; color[10] = color[11]; color[14] = color[15];
 615
 616                         if (x < width - 3) {
 617                                 x+=3;
 618                                 if (src_bytes_per_pixel == 1) {
 619                                         color[3] = GET_COLOR(*(((unsigned char*)src_line[0]) + x));
 620                                         color[7] = GET_COLOR(*(((unsigned char*)src_line[1]) + x));
 621                                         color[11] = GET_COLOR(*(((unsigned char*)src_line[2]) + x));
 622                                         color[15] = GET_COLOR(*(((unsigned char*)src_line[3]) + x));
 623                                 } else if (src_bytes_per_pixel == 2) {
 624                                         color[3] = *(((unsigned short*)src_line[0]) + x);
 625                                         color[7] = *(((unsigned short*)src_line[1]) + x);
 626                                         color[11] = *(((unsigned short*)src_line[2]) + x);
 627                                         color[15] = *(((unsigned short*)src_line[3]) + x);
 628                                 } else {
 629                                         color[3] = *(((unsigned long*)src_line[0]) + x);
 630                                         color[7] = *(((unsigned long*)src_line[1]) + x);
 631                                         color[11] = *(((unsigned long*)src_line[2]) + x);
 632                                         color[15] = *(((unsigned long*)src_line[3]) + x);
 633                                 }
 634                                 x-=3;
 635                         }
 636                 }
 637
 638                 /* We're done with one line, so we shift the source lines up */
 639                 src_line[0] = src_line[1];
 640                 src_line[1] = src_line[2];
 641                 src_line[2] = src_line[3];
 642
 643                 /* Read next line */
 644                 if (y + 3 >= height)
 645                         src_line[3] = src_line[2];
 646                 else
 647                         src_line[3] = src_line[2] + src_pitch;
 648
 649                 /* Then shift the color matrix up */
 650                 if (src_bytes_per_pixel == 1) {
 651                         unsigned char *sbp;
 652                         sbp = src_line[0];
 653                         color[0] = GET_COLOR(*sbp);     color[1] = color[0];    color[2] = GET_COLOR(*(sbp + 1));  color[3] = GET_COLOR(*(sbp + 2));
 654                         sbp = src_line[1];
 655                         color[4] = GET_COLOR(*sbp);     color[5] = color[4];    color[6] = GET_COLOR(*(sbp + 1));  color[7] = GET_COLOR(*(sbp + 2));
 656                         sbp = src_line[2];
 657                         color[8] = GET_COLOR(*sbp);     color[9] = color[8];    color[10] = GET_COLOR(*(sbp + 1)); color[11] = GET_COLOR(*(sbp + 2));
 658                         sbp = src_line[3];
 659                         color[12] = GET_COLOR(*sbp);    color[13] = color[12];  color[14] = GET_COLOR(*(sbp + 1)); color[15] = GET_COLOR(*(sbp + 2));
 660                 } else if (src_bytes_per_pixel == 2) {
 661                         unsigned short *sbp;
 662                         sbp = (unsigned short*)src_line[0];
 663                         color[0] = *sbp;     color[1] = color[0];    color[2] = *(sbp + 1);  color[3] = *(sbp + 2);
 664                         sbp = (unsigned short*)src_line[1];
 665                         color[4] = *sbp;     color[5] = color[4];    color[6] = *(sbp + 1);  color[7] = *(sbp + 2);
 666                         sbp = (unsigned short*)src_line[2];
 667                         color[8] = *sbp;     color[9] = color[9];    color[10] = *(sbp + 1); color[11] = *(sbp + 2);
 668                         sbp = (unsigned short*)src_line[3];
 669                         color[12] = *sbp;    color[13] = color[12];  color[14] = *(sbp + 1); color[15] = *(sbp + 2);
 670                 } else {
 671                         unsigned long *lbp;
 672                         lbp = (unsigned long*)src_line[0];
 673                         color[0] = *lbp;     color[1] = color[0];    color[2] = *(lbp + 1);  color[3] = *(lbp + 2);
 674                         lbp = (unsigned long*)src_line[1];
 675                         color[4] = *lbp;     color[5] = color[4];    color[6] = *(lbp + 1);  color[7] = *(lbp + 2);
 676                         lbp = (unsigned long*)src_line[2];
 677                         color[8] = *lbp;     color[9] = color[9];    color[10] = *(lbp + 1); color[11] = *(lbp + 2);
 678                         lbp = (unsigned long*)src_line[3];
 679                         color[12] = *lbp;    color[13] = color[12];  color[14] = *(lbp + 1); color[15] = *(lbp + 2);
 680                 }
 681
 682                 if (y < height - 1) {
 683                         dst_line[0] += dst_pitch * 2;
 684                         dst_line[1] += dst_pitch * 2;
 685                 }
 686         }
 687 }
 688
 689
 690 void flippage(int page)
 691 {
 692         int x,y;
 693         unsigned char *src;
 694         unsigned char *dest;
 695
 696         assert(drawing_enable==0);
 697
 698         SDL_LockSurface(jnb_surface);
 699         if (!jnb_surface->pixels) {
 700
 701                 for (x=0; x<(25*16); x++) {
 702                         dirty_blocks[0][x] = 1;
 703                         dirty_blocks[1][x] = 1;
 704                 }
 705
 706                 return;
 707         }
 708 #ifdef SCALE_UP
 709         dest=(unsigned char *)jnb_surface->pixels;
 710         src=screen_buffer[page];
 711         Super2xSaI(src, JNB_WIDTH, 1, dest, jnb_surface->pitch, 2, JNB_WIDTH, JNB_HEIGHT, current_pal);
 712 #else
 713         dest=(unsigned char *)jnb_surface->pixels;
 714         src=screen_buffer[page];
 715         for (y=0; y<screen_height; y++) {
 716                 for (x=0; x<25; x++) {
 717                         int count;
 718                         int test_x;
 719
 720                         count=0;
 721                         test_x=x;
 722                         while ( (test_x<25) && (dirty_blocks[page][(y>>dirty_block_shift)*25+test_x]) ) {
 723                                 count++;
 724                                 test_x++;
 725                         }
 726                         if (count) {
 727                                 memcpy( &dest[y*jnb_surface->pitch+(x<<dirty_block_shift)*bytes_per_pixel],
 728                                         &src[y*screen_pitch+((x<<dirty_block_shift)*bytes_per_pixel)],
 729                                         ((16<<dirty_block_shift)>>4)*bytes_per_pixel*count);
 730                         }
 731                         x = test_x;
 732                 }
 733         }
 734         memset(&dirty_blocks[page], 0, sizeof(int)*25*16);
 735 #endif
 736         SDL_UnlockSurface(jnb_surface);
 737         SDL_Flip(jnb_surface);
 738 }
 739
 740
 741 void draw_begin(void)
 742 {
 743         assert(drawing_enable==0);
 744
 745         drawing_enable = 1;
 746         if (background_drawn == 0) {
 747                 if (background) {
 748                         put_block(0, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 749                         put_block(1, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 750                 } else {
 751                         clear_page(0, 0);
 752                         clear_page(1, 0);
 753                 }
 754                 background_drawn = 1;
 755         }
 756 }
 757
 758
 759 void draw_end(void)
 760 {
 761         assert(drawing_enable==1);
 762
 763         drawing_enable = 0;
 764 }
 765
 766
 767 void setpalette(int index, int count, char *palette)
 768 {
 769         SDL_Color colors[256];
 770         int i;
 771
 772         assert(drawing_enable==0);
 773
 774         for (i = 0; i < count; i++) {
 775                 colors[i+index].r = palette[i * 3 + 0] << 2;
 776                 colors[i+index].g = palette[i * 3 + 1] << 2;
 777                 colors[i+index].b = palette[i * 3 + 2] << 2;
 778                 current_pal[i+index] = SDL_MapRGB(jnb_surface->format, colors[i+index].r, colors[i+index].g, colors[i+index].b);
 779         }
 780         if (!scale_up)
 781                 SDL_SetColors(jnb_surface, &colors[index], index, count);
 782 }
 783
 784
 785 void fillpalette(int red, int green, int blue)
 786 {
 787         SDL_Color colors[256];
 788         int i;
 789
 790         assert(drawing_enable==0);
 791
 792         for (i = 0; i < 256; i++) {
 793                 colors[i].r = red << 2;
 794                 colors[i].g = green << 2;
 795                 colors[i].b = blue << 2;
 796                 current_pal[i] = SDL_MapRGB(jnb_surface->format, colors[i].r, colors[i].g, colors[i].b);
 797         }
 798         if (!scale_up)
 799                 SDL_SetColors(jnb_surface, colors, 0, 256);
 800 }
 801
 802
 803 void get_block(int page, int x, int y, int width, int height, void *buffer)
 804 {
 805         unsigned char *buffer_ptr, *vga_ptr;
 806         int h;
 807
 808         assert(drawing_enable==1);
 809
 810         if (scale_up) {
 811                 x *= 2;
 812                 y *= 2;
 813                 width *= 2;
 814                 height *= 2;
 815         }
 816
 817         if (x < 0)
 818                 x = 0;
 819         if (y < 0)
 820                 y = 0;
 821         if (y + height >= screen_height)
 822                 height = screen_height - y;
 823         if (x + width >= screen_width)
 824                 width = screen_width - x;
 825         if (width<=0)
 826                 return;
 827         if(height<=0)
 828                 return;
 829
 830         vga_ptr = get_vgaptr(page, x, y);
 831         buffer_ptr = buffer;
 832         for (h = 0; h < height; h++) {
 833                 memcpy(buffer_ptr, vga_ptr, width * bytes_per_pixel);
 834                 vga_ptr += screen_pitch;
 835                 buffer_ptr += width * bytes_per_pixel;
 836         }
 837
 838 }
 839
 840
 841 void put_block(int page, int x, int y, int width, int height, void *buffer)
 842 {
 843         int h;
 844         unsigned char *vga_ptr, *buffer_ptr;
 845
 846         assert(drawing_enable==1);
 847
 848         if (scale_up) {
 849                 x *= 2;
 850                 y *= 2;
 851                 width *= 2;
 852                 height *= 2;
 853         }
 854
 855         if (x < 0)
 856                 x = 0;
 857         if (y < 0)
 858                 y = 0;
 859         if (y + height >= screen_height)
 860                 height = screen_height - y;
 861         if (x + width >= screen_width)
 862                 width = screen_width - x;
 863         if (width<=0)
 864                 return;
 865         if(height<=0)
 866                 return;
 867
 868         vga_ptr = get_vgaptr(page, x, y);
 869         buffer_ptr = buffer;
 870         for (h = 0; h < height; h++) {
 871                 memcpy(vga_ptr, buffer_ptr, width * bytes_per_pixel);
 872                 vga_ptr += screen_pitch;
 873                 buffer_ptr += width * bytes_per_pixel;
 874         }
 875         width = ((x+width)>>dirty_block_shift) - (x>>dirty_block_shift) + 1;
 876         height = ((y+height)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 877         x >>= dirty_block_shift;
 878         y >>= dirty_block_shift;
 879         while (width--)
 880                 for (h=0; h<height; h++)
 881                         dirty_blocks[page][(y+h)*25+(x+width)] = 1;
 882 }
 883
 884
 885 void put_text(int page, int x, int y, char *text, int align)
 886 {
 887         int c1;
 888         int t1;
 889         int width;
 890         int cur_x;
 891         int image;
 892
 893         assert(drawing_enable==1);
 894
 895         if (text == NULL || strlen(text) == 0)
 896                 return;
 897         if (font_gobs.num_images == 0)
 898                 return;
 899
 900         width = 0;
 901         c1 = 0;
 902         while (text[c1] != 0) {
 903                 t1 = text[c1];
 904                 c1++;
 905                 if (t1 == ' ') {
 906                         width += 5;
 907                         continue;
 908                 }
 909                 if (t1 >= 33 && t1 <= 34)
 910                         image = t1 - 33;
 911
 912                 else if (t1 >= 39 && t1 <= 41)
 913                         image = t1 - 37;
 914
 915                 else if (t1 >= 44 && t1 <= 59)
 916                         image = t1 - 39;
 917
 918                 else if (t1 >= 64 && t1 <= 90)
 919                         image = t1 - 43;
 920
 921                 else if (t1 >= 97 && t1 <= 122)
 922                         image = t1 - 49;
 923
 924                 else if (t1 == '~')
 925                         image = 74;
 926
 927                 else if (t1 == 0x84)
 928                         image = 75;
 929
 930                 else if (t1 == 0x86)
 931                         image = 76;
 932
 933                 else if (t1 == 0x8e)
 934                         image = 77;
 935
 936                 else if (t1 == 0x8f)
 937                         image = 78;
 938
 939                 else if (t1 == 0x94)
 940                         image = 79;
 941
 942                 else if (t1 == 0x99)
 943                         image = 80;
 944
 945                 else
 946                         continue;
 947                 width += pob_width(image, &font_gobs) + 1;
 948         }
 949
 950         switch (align) {
 951         case 0:
 952                 cur_x = x;
 953                 break;
 954         case 1:
 955                 cur_x = x - width;
 956                 break;
 957         case 2:
 958                 cur_x = x - width / 2;
 959                 break;
 960         default:
 961                 cur_x = 0;      /* this should cause error? -Chuck */
 962                 break;
 963         }
 964         c1 = 0;
 965
 966         while (text[c1] != 0) {
 967                 t1 = text[c1];
 968                 c1++;
 969                 if (t1 == ' ') {
 970                         cur_x += 5;
 971                         continue;
 972                 }
 973                 if (t1 >= 33 && t1 <= 34)
 974                         image = t1 - 33;
 975
 976                 else if (t1 >= 39 && t1 <= 41)
 977                         image = t1 - 37;
 978
 979                 else if (t1 >= 44 && t1 <= 59)
 980                         image = t1 - 39;
 981
 982                 else if (t1 >= 64 && t1 <= 90)
 983                         image = t1 - 43;
 984
 985                 else if (t1 >= 97 && t1 <= 122)
 986                         image = t1 - 49;
 987
 988                 else if (t1 == '~')
 989                         image = 74;
 990
 991                 else if (t1 == 0x84)
 992                         image = 75;
 993
 994                 else if (t1 == 0x86)
 995                         image = 76;
 996
 997                 else if (t1 == 0x8e)
 998                         image = 77;
 999
1000                 else if (t1 == 0x8f)
1001                         image = 78;
1002
1003                 else if (t1 == 0x94)
1004                         image = 79;
1005
1006                 else if (t1 == 0x99)
1007                         image = 80;
1008
1009                 else
1010                         continue;
1011                 put_pob(page, cur_x, y, image, &font_gobs, 1, mask_pic);
1012                 cur_x += pob_width(image, &font_gobs) + 1;
1013         }
1014 }
1015
1016
1017 void put_pob(int page, int x, int y, int image, gob_t *gob, int use_mask, void *mask_pic)
1018 {
1019         int c1, c2;
1020         int pob_x, pob_y;
1021         int width, height;
1022         int draw_width, draw_height;
1023         int colour;
1024
1025         assert(drawing_enable==1);
1026         assert(gob);
1027         assert(image>=0);
1028         assert(image<gob->num_images);
1029
1030         if (scale_up) {
1031                 x *= 2;
1032                 y *= 2;
1033                 width = draw_width = gob->width[image]*2;
1034                 height = draw_height = gob->height[image]*2;
1035                 x -= gob->hs_x[image]*2;
1036                 y -= gob->hs_y[image]*2;
1037         } else {
1038                 width = draw_width = gob->width[image];
1039                 height = draw_height = gob->height[image];
1040                 x -= gob->hs_x[image];
1041                 y -= gob->hs_y[image];
1042         }
1043
1044         if ((x + width) <= 0 || x >= screen_width)
1045                 return;
1046         if ((y + height) <= 0 || y >= screen_height)
1047                 return;
1048
1049         pob_x = 0;
1050         pob_y = 0;
1051         if (x < 0) {
1052                 pob_x -= x;
1053                 draw_width += x;
1054                 x = 0;
1055         }
1056         if ((x + width) > screen_width)
1057                 draw_width -= x + width - screen_width;
1058         if (y < 0) {
1059                 pob_y -= y;
1060                 draw_height += y;
1061                 y = 0;
1062         }
1063         if ((y + height) > screen_height)
1064                 draw_height -= y + height - screen_height;
1065
1066
1067         if (bytes_per_pixel==1) {
1068                 unsigned char *vga_ptr;
1069                 unsigned char *pob_ptr;
1070                 unsigned char *mask_ptr;
1071
1072                 vga_ptr = get_vgaptr(page, x, y);
1073                 pob_ptr = ((unsigned char *)gob->data[image]) + ((pob_y * width) + pob_x);
1074                 mask_ptr = ((unsigned char *)mask) + ((y * screen_pitch) + (x*bytes_per_pixel));
1075                 for (c1 = 0; c1 < draw_height; c1++) {
1076                         for (c2 = 0; c2 < draw_width; c2++) {
1077                                 colour = *mask_ptr;
1078                                 if (use_mask == 0 || (use_mask == 1 && colour == 0)) {
1079                                         colour = *pob_ptr;
1080                                         if (colour != 0) {
1081                                                 *vga_ptr = colour;
1082                                         }
1083                                 }
1084                                 vga_ptr++;
1085                                 pob_ptr++;
1086                                 mask_ptr++;
1087                         }
1088                         pob_ptr += width - c2;
1089                         vga_ptr += (screen_width - c2);
1090                         mask_ptr += (screen_width - c2);
1091                 }
1092         } else if (bytes_per_pixel==2) {
1093                 unsigned short *vga_ptr;
1094                 unsigned short *pob_ptr;
1095                 unsigned short *mask_ptr;
1096
1097                 vga_ptr = get_vgaptr(page, x, y);
1098                 pob_ptr = (unsigned short *)(((unsigned char *)gob->data[image]) + ((pob_y * width) + pob_x));
1099                 mask_ptr = (unsigned short *)(((unsigned char *)mask) + ((y * screen_pitch) + (x*bytes_per_pixel)));
1100                 for (c1 = 0; c1 < draw_height; c1++) {
1101                         for (c2 = 0; c2 < draw_width; c2++) {
1102                                 colour = *mask_ptr;
1103                                 if (use_mask == 0 || (use_mask == 1 && colour == 0)) {
1104                                         colour = *pob_ptr;
1105                                         if (colour != 0) {
1106                                                 *vga_ptr = colour;
1107                                         }
1108                                 }
1109                                 vga_ptr++;
1110                                 pob_ptr++;
1111                                 mask_ptr++;
1112                         }
1113                         pob_ptr += width - c2;
1114                         vga_ptr += (screen_width - c2);
1115                         mask_ptr += (screen_width - c2);
1116                 }
1117         } else {
1118                 unsigned int *vga_ptr;
1119                 unsigned int *pob_ptr;
1120                 unsigned int *mask_ptr;
1121
1122                 vga_ptr = get_vgaptr(page, x, y);
1123                 pob_ptr = (unsigned int *)(((unsigned char *)gob->data[image]) + ((pob_y * width) + pob_x));
1124                 mask_ptr = (unsigned int *)(((unsigned char *)mask) + ((y * screen_pitch) + (x*bytes_per_pixel)));
1125                 for (c1 = 0; c1 < draw_height; c1++) {
1126                         for (c2 = 0; c2 < draw_width; c2++) {
1127                                 colour = *mask_ptr;
1128                                 if (use_mask == 0 || (use_mask == 1 && colour == 0)) {
1129                                         colour = *pob_ptr;
1130                                         if (colour != 0) {
1131                                                 *vga_ptr = colour;
1132                                         }
1133                                 }
1134                                 vga_ptr++;
1135                                 pob_ptr++;
1136                                 mask_ptr++;
1137                         }
1138                         pob_ptr += width - c2;
1139                         vga_ptr += (screen_width - c2);
1140                         mask_ptr += (screen_width - c2);
1141                 }
1142         }
1143         draw_width = ((x+draw_width)>>dirty_block_shift) - (x>>dirty_block_shift) + 1;
1144         draw_height = ((y+draw_height)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
1145         x >>= dirty_block_shift;
1146         y >>= dirty_block_shift;
1147         while (draw_width--)
1148                 for (c1=0; c1<draw_height; c1++)
1149                         dirty_blocks[page][(y+c1)*25+(x+draw_width)] = 1;
1150 }
1151
1152
1153 int pob_width(int image, gob_t *gob)
1154 {
1155         assert(gob);
1156         assert(image>=0);
1157         assert(image<gob->num_images);
1158         return gob->width[image];
1159 }
1160
1161
1162 int pob_height(int image, gob_t *gob)
1163 {
1164         assert(gob);
1165         assert(image>=0);
1166         assert(image<gob->num_images);
1167         return gob->height[image];
1168 }
1169
1170
1171 int pob_hs_x(int image, gob_t *gob)
1172 {
1173         assert(gob);
1174         assert(image>=0);
1175         assert(image<gob->num_images);
1176         return gob->hs_x[image];
1177 }
1178
1179
1180 int pob_hs_y(int image, gob_t *gob)
1181 {
1182         assert(gob);
1183         assert(image>=0);
1184         assert(image<gob->num_images);
1185         return gob->hs_y[image];
1186 }
1187
1188
1189 int read_pcx(unsigned char * handle, void *buf, int buf_len, char *pal)
1190 {
1191         unsigned char *buffer=buf;
1192         short c1;
1193         short a, b;
1194         long ofs1;
1195         if (buffer != 0) {
1196                 handle += 128;
1197                 ofs1 = 0;
1198                 while (ofs1 < buf_len) {
1199                         a = *(handle++);
1200                         if ((a & 0xc0) == 0xc0) {
1201                                 b = *(handle++);
1202                                 a &= 0x3f;
1203                                 for (c1 = 0; c1 < a && ofs1 < buf_len; c1++)
1204                                         buffer[ofs1++] = (char) b;
1205                         } else
1206                                 buffer[ofs1++] = (char) a;
1207                 }
1208                 if (pal != 0) {
1209                         handle++;
1210                         for (c1 = 0; c1 < 768; c1++)
1211                                 pal[c1] = *(handle++) /*fgetc(handle)*/ >> 2;
1212                 }
1213         }
1214         return 0;
1215 }
1216
1217
1218 void register_background(char *pixels, char pal[768])
1219 {
1220         if (background) {
1221                 free(background);
1222                 background = NULL;
1223         }
1224         background_drawn = 0;
1225         if (!pixels)
1226                 return;
1227         assert(pal);
1228         if (scale_up) {
1229                 int int_pal[256];
1230                 int i;
1231
1232                 for (i=0; i<256; i++)
1233                         int_pal[i] = SDL_MapRGB(jnb_surface->format, (Uint8)(pal[i*3+0]<<2), (Uint8)(pal[i*3+1]<<2), (Uint8)(pal[i*3+2]<<2));
1234                 background = malloc(screen_pitch*screen_height);
1235                 assert(background);
1236                 Init_2xSaI(565);
1237                 Super2xSaI((unsigned char *)pixels, JNB_WIDTH, 1, (unsigned char *)background, screen_pitch, bytes_per_pixel, JNB_WIDTH, JNB_HEIGHT, int_pal);
1238         } else {
1239                 background = malloc(JNB_WIDTH*JNB_HEIGHT);
1240                 assert(background);
1241                 memcpy(background, pixels, JNB_WIDTH*JNB_HEIGHT);
1242         }
1243 }
1244
1245 int register_gob(unsigned char *handle, gob_t *gob, int len)
1246 {
1247         unsigned char *gob_data;
1248         int i;
1249
1250         gob_data = malloc(len);
1251         memcpy(gob_data, handle, len);
1252
1253         gob->num_images = (short)((gob_data[0]) + (gob_data[1] << 8));
1254
1255         gob->width = malloc(gob->num_images*sizeof(int));
1256         gob->height = malloc(gob->num_images*sizeof(int));
1257         gob->hs_x = malloc(gob->num_images*sizeof(int));
1258         gob->hs_y = malloc(gob->num_images*sizeof(int));
1259         gob->data = malloc(gob->num_images*sizeof(void *));
1260         gob->orig_data = malloc(gob->num_images*sizeof(void *));
1261         for (i=0; i<gob->num_images; i++) {
1262                 int image_size;
1263                 int offset;
1264
1265                 offset = (gob_data[i*4+2]) + (gob_data[i*4+3] << 8) + (gob_data[i*4+4] << 16) + (gob_data[i*4+5] << 24);
1266
1267                 gob->width[i]  = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
1268                 gob->height[i] = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
1269                 gob->hs_x[i]   = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
1270                 gob->hs_y[i]   = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
1271
1272                 image_size = gob->width[i] * gob->height[i];
1273                 gob->orig_data[i] = malloc(image_size);
1274                 memcpy(gob->orig_data[i], &gob_data[offset], image_size);
1275                 if (scale_up) {
1276                         image_size = gob->width[i] * gob->height[i] * 4 * bytes_per_pixel;
1277                         gob->data[i] = malloc(image_size);
1278                 } else {
1279                         gob->data[i] = (unsigned short *)gob->orig_data[i];
1280                 }
1281         }
1282         free(gob_data);
1283         return 0;
1284 }
1285
1286
1287 void recalculate_gob(gob_t *gob, char pal[768])
1288 {
1289         int int_pal[256];
1290         int i;
1291
1292         if (!scale_up)
1293                 return;
1294
1295         Init_2xSaI(565);
1296
1297         for (i=1; i<256; i++) {
1298                 int_pal[i] = SDL_MapRGB(jnb_surface->format, (Uint8)(pal[i*3+0]<<2), (Uint8)(pal[i*3+1]<<2), (Uint8)(pal[i*3+2]<<2));
1299                 if (int_pal[i] == 0)
1300                         int_pal[i] = SDL_MapRGB(jnb_surface->format, 8, 8, 8);
1301         }
1302         int_pal[0] = 0;
1303
1304         for (i=0; i<gob->num_images; i++) {
1305                 Super2xSaI(gob->orig_data[i], gob->width[i], 1, (unsigned char *)gob->data[i], gob->width[i]*2*bytes_per_pixel, bytes_per_pixel, gob->width[i], gob->height[i], int_pal);
1306         }
1307 }
1308
1309 void register_mask(void *pixels)
1310 {
1311         if (mask) {
1312                 free(mask);
1313                 mask = NULL;
1314         }
1315         assert(pixels);
1316         if (scale_up) {
1317                 int int_pal[256];
1318                 int i;
1319
1320                 int_pal[0] = 0;
1321                 for (i=1; i<256; i++)
1322                         int_pal[i] = 0xffffffff;
1323                 mask = malloc(screen_pitch*screen_height);
1324                 assert(mask);
1325                 Init_2xSaI(565);
1326                 Scale2x(pixels, JNB_WIDTH, 1, (unsigned char *)mask, screen_pitch, bytes_per_pixel, JNB_WIDTH, JNB_HEIGHT, int_pal);
1327         } else {
1328                 mask = malloc(JNB_WIDTH*JNB_HEIGHT);
1329                 assert(mask);
1330                 memcpy(mask, pixels, JNB_WIDTH*JNB_HEIGHT);
1331         }
1332 }