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  * This file is part of Jump'n'Bump.
  10  *
  11  * Jump'n'Bump is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * Jump'n'Bump is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  24  */
  25
  26 #include "globals.h"
  27 #include "SDL_endian.h"
  28 #include "filter.h"
  29
  30 #ifdef _MSC_VER
  31     #include "jumpnbump32.xpm"
  32 #elif __APPLE__
  33     #include "jumpnbump128.xpm"
  34 #else
  35     #include "jumpnbump64.xpm"
  36 #endif
  37 SDL_Surface *icon;
  38
  39 int screen_width=400;
  40 int screen_height=256;
  41 int screen_pitch=400;
  42 int scale_up=0;
  43 int dirty_block_shift=4;
  44
  45 static SDL_Surface *jnb_surface;
  46 static int fullscreen = 0;
  47 static int vinited = 0;
  48 static void *screen_buffer[2];
  49 static int drawing_enable = 0;
  50 static void *background = NULL;
  51 static int background_drawn;
  52 static void *mask = NULL;
  53 static int dirty_blocks[2][25*16*2];
  54
  55 static SDL_Surface *load_xpm_from_array(char **xpm)
  56 {
  57 #define NEXT_TOKEN { \
  58         while ((*p != ' ') && (*p != '\t')) p++; \
  59         while ((*p == ' ') || (*p == '\t')) p++; }
  60
  61         SDL_Surface *surface;
  62         char *p;
  63         int width;
  64         int height;
  65         int colors;
  66         int images;
  67         int color;
  68         int pal[256];
  69         int x,y;
  70
  71         p = *xpm++;
  72
  73         width = atoi(p);
  74         if (width <= 0)
  75                 return NULL;
  76         NEXT_TOKEN;
  77
  78         height = atoi(p);
  79         if (height <= 0)
  80                 return NULL;
  81         NEXT_TOKEN;
  82
  83         colors = atoi(p);
  84         if (colors <= 0)
  85                 return NULL;
  86         NEXT_TOKEN;
  87
  88         images = atoi(p);
  89         if (images <= 0)
  90                 return NULL;
  91
  92         surface = SDL_CreateRGBSurface(SDL_SWSURFACE, width, height, 32, 0x000000ff, 0x0000ff00, 0x00ff0000, 0xff000000);
  93         if (!surface)
  94                 return NULL;
  95
  96         SDL_SetColorKey(surface, SDL_SRCCOLORKEY, SDL_MapRGBA(surface->format, 0, 0, 0, 0));
  97         while (colors--) {
  98                 p = *xpm++;
  99
 100                 color = *p++;
 101                 NEXT_TOKEN;
 102
 103                 if (*p++ != 'c') {
 104                         SDL_FreeSurface(surface);
 105                         return NULL;
 106                 }
 107                 NEXT_TOKEN;
 108
 109                 if (*p == '#')
 110                         pal[color] = strtoul(++p, NULL, 16) | 0xff000000;
 111                 else
 112                         pal[color] = 0;
 113         }
 114
 115         y = 0;
 116         while (y < height) {
 117                 int *pixels;
 118
 119                 p = *xpm++;
 120
 121                 pixels = (int *)&((char *)surface->pixels)[y++ * surface->pitch];
 122                 x = 0;
 123                 while (x < width) {
 124                         Uint8 r,g,b,a;
 125
 126                         if (*p == '\0') {
 127                                 SDL_FreeSurface(surface);
 128                                 return NULL;
 129                         }
 130                         r = (pal[(int)*p] >> 16) & 0xff;
 131                         b = (pal[(int)*p] & 0xff);
 132                         g = (pal[(int)*p] >> 8) & 0xff;
 133                         a = (pal[(int)*p] >> 24) & 0xff;
 134                         pixels[x] = SDL_MapRGBA(surface->format, r, g, b, a);
 135                         x++;
 136                         p++;
 137                 }
 138         }
 139
 140         return surface;
 141 }
 142
 143 unsigned char *get_vgaptr(int page, int x, int y)
 144 {
 145         assert(drawing_enable==1);
 146
 147         return (unsigned char *)screen_buffer[page] + (y*screen_pitch)+(x);
 148 }
 149
 150
 151 void set_scaling(int scale)
 152 {
 153         if (scale==1) {
 154                 screen_width=800;
 155                 screen_height=512;
 156                 scale_up=1;
 157                 dirty_block_shift=5;
 158                 screen_pitch=screen_width;
 159         } else {
 160                 screen_width=400;
 161                 screen_height=256;
 162                 scale_up=0;
 163                 dirty_block_shift=4;
 164                 screen_pitch=screen_width;
 165         }
 166 }
 167
 168 void open_screen(void)
 169 {
 170         int lval = 0;
 171         int flags;
 172
 173         lval = SDL_Init(SDL_INIT_TIMER | SDL_INIT_AUDIO | SDL_INIT_VIDEO | SDL_INIT_JOYSTICK);
 174         if (lval < 0) {
 175                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 176                 exit(EXIT_FAILURE);
 177         }
 178
 179         flags = SDL_SWSURFACE;
 180         if (fullscreen)
 181                 flags |= SDL_FULLSCREEN;
 182         jnb_surface = SDL_SetVideoMode(screen_width, screen_height, 8, flags);
 183
 184         if (!jnb_surface) {
 185                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 186                 exit(EXIT_FAILURE);
 187         }
 188
 189         if(fullscreen)
 190                 SDL_ShowCursor(0);
 191         else
 192                 SDL_ShowCursor(1);
 193
 194         SDL_WM_SetCaption("Jump'n'Bump","");
 195
 196         icon=load_xpm_from_array(jumpnbump_xpm);
 197         if (icon==NULL) {
 198             printf("Couldn't load icon\n");
 199         } else {
 200             SDL_WM_SetIcon(icon,NULL);
 201         }
 202
 203         vinited = 1;
 204
 205         memset(dirty_blocks, 0, sizeof(dirty_blocks));
 206
 207         screen_buffer[0]=malloc(screen_width*screen_height);
 208         screen_buffer[1]=malloc(screen_width*screen_height);
 209
 210 /*
 211         dirty_blocks[0]=malloc(sizeof(int)*25*16+1000);
 212         dirty_blocks[1]=malloc(sizeof(int)*25*16+1000);
 213 */
 214
 215         return;
 216 }
 217
 218
 219 void fs_toggle()
 220 {
 221         if (!vinited) {
 222                 fullscreen ^= 1;
 223                 return;
 224         }
 225         if (SDL_WM_ToggleFullScreen(jnb_surface))
 226                 fullscreen ^= 1;
 227 }
 228
 229
 230 void wait_vrt(int mix)
 231 {
 232         return;
 233 }
 234
 235
 236 void clear_page(int page, int color)
 237 {
 238         int i,j;
 239         unsigned char *buf = get_vgaptr(page, 0, 0);
 240
 241         assert(drawing_enable==1);
 242
 243         for (i=0; i<(25*16); i++)
 244                 dirty_blocks[page][i] = 1;
 245
 246         for (i=0; i<screen_height; i++)
 247                 for (j=0; j<screen_width; j++)
 248                         *buf++ = color;
 249 }
 250
 251
 252 void clear_lines(int page, int y, int count, int color)
 253 {
 254         int i,j;
 255
 256         assert(drawing_enable==1);
 257
 258         if (scale_up) {
 259                 count *= 2;
 260                 y *= 2;
 261         }
 262
 263         for (i=0; i<count; i++) {
 264                 if ((i+y)<screen_height) {
 265                         unsigned char *buf = get_vgaptr(page, 0, i+y);
 266                         for (j=0; j<screen_width; j++)
 267                                 *buf++ = color;
 268                 }
 269         }
 270         count = ((y+count)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 271         y >>= dirty_block_shift;
 272         for (i=0; i<count; i++)
 273                 for (j=0; j<25; j++)
 274                         dirty_blocks[page][(y+i)*25+j] = 1;
 275 }
 276
 277
 278 int get_color(int color, char pal[768])
 279 {
 280         assert(color<256);
 281         assert(pal);
 282         return SDL_MapRGB(jnb_surface->format, (Uint8)(pal[color*3+0]<<2), (Uint8)(pal[color*3+1]<<2), (Uint8)(pal[color*3+2]<<2));
 283 }
 284
 285
 286 int get_pixel(int page, int x, int y)
 287 {
 288         assert(drawing_enable==1);
 289
 290         if (scale_up) {
 291                 x *= 2;
 292                 y *= 2;
 293         }
 294
 295         assert(x<screen_width);
 296         assert(y<screen_height);
 297
 298         return *(unsigned char *)get_vgaptr(page, x, y);
 299 }
 300
 301
 302 void set_pixel(int page, int x, int y, int color)
 303 {
 304         assert(drawing_enable==1);
 305
 306         if (scale_up) {
 307                 x *= 2;
 308                 y *= 2;
 309         }
 310
 311         assert(x<screen_width);
 312         assert(y<screen_height);
 313
 314         dirty_blocks[page][(y>>dirty_block_shift)*25+(x>>dirty_block_shift)] = 1;
 315
 316         *(unsigned char *)get_vgaptr(page, x, y) = color;
 317 }
 318
 319
 320 void flippage(int page)
 321 {
 322         int x,y;
 323         unsigned char *src;
 324         unsigned char *dest;
 325
 326         assert(drawing_enable==0);
 327
 328         SDL_LockSurface(jnb_surface);
 329         if (!jnb_surface->pixels) {
 330
 331                 for (x=0; x<(25*16); x++) {
 332                         dirty_blocks[0][x] = 1;
 333                         dirty_blocks[1][x] = 1;
 334                 }
 335
 336                 return;
 337         }
 338         dest=(unsigned char *)jnb_surface->pixels;
 339         src=screen_buffer[page];
 340         for (y=0; y<screen_height; y++) {
 341                 for (x=0; x<25; x++) {
 342                         int count;
 343                         int test_x;
 344
 345                         count=0;
 346                         test_x=x;
 347                         while ( (test_x<25) && (dirty_blocks[page][(y>>dirty_block_shift)*25+test_x]) ) {
 348                                 count++;
 349                                 test_x++;
 350                         }
 351                         if (count) {
 352                                 memcpy( &dest[y*jnb_surface->pitch+(x<<dirty_block_shift)],
 353                                         &src[y*screen_pitch+((x<<dirty_block_shift))],
 354                                         ((16<<dirty_block_shift)>>4)*count);
 355                         }
 356                         x = test_x;
 357                 }
 358         }
 359         memset(&dirty_blocks[page], 0, sizeof(int)*25*16);
 360         SDL_UnlockSurface(jnb_surface);
 361         SDL_Flip(jnb_surface);
 362 }
 363
 364
 365 void draw_begin(void)
 366 {
 367         assert(drawing_enable==0);
 368
 369         drawing_enable = 1;
 370         if (background_drawn == 0) {
 371                 if (background) {
 372                         put_block(0, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 373                         put_block(1, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 374                 } else {
 375                         clear_page(0, 0);
 376                         clear_page(1, 0);
 377                 }
 378                 background_drawn = 1;
 379         }
 380 }
 381
 382
 383 void draw_end(void)
 384 {
 385         assert(drawing_enable==1);
 386
 387         drawing_enable = 0;
 388 }
 389
 390
 391 void setpalette(int index, int count, char *palette)
 392 {
 393         SDL_Color colors[256];
 394         int i;
 395
 396         assert(drawing_enable==0);
 397
 398         for (i = 0; i < count; i++) {
 399                 colors[i+index].r = palette[i * 3 + 0] << 2;
 400                 colors[i+index].g = palette[i * 3 + 1] << 2;
 401                 colors[i+index].b = palette[i * 3 + 2] << 2;
 402         }
 403         SDL_SetColors(jnb_surface, &colors[index], index, count);
 404 }
 405
 406
 407 void fillpalette(int red, int green, int blue)
 408 {
 409         SDL_Color colors[256];
 410         int i;
 411
 412         assert(drawing_enable==0);
 413
 414         for (i = 0; i < 256; i++) {
 415                 colors[i].r = red << 2;
 416                 colors[i].g = green << 2;
 417                 colors[i].b = blue << 2;
 418         }
 419         SDL_SetColors(jnb_surface, colors, 0, 256);
 420 }
 421
 422
 423 void get_block(int page, int x, int y, int width, int height, void *buffer)
 424 {
 425         unsigned char *buffer_ptr, *vga_ptr;
 426         int h;
 427
 428         assert(drawing_enable==1);
 429
 430         if (scale_up) {
 431                 x *= 2;
 432                 y *= 2;
 433                 width *= 2;
 434                 height *= 2;
 435         }
 436
 437         if (x < 0)
 438                 x = 0;
 439         if (y < 0)
 440                 y = 0;
 441         if (y + height >= screen_height)
 442                 height = screen_height - y;
 443         if (x + width >= screen_width)
 444                 width = screen_width - x;
 445         if (width<=0)
 446                 return;
 447         if(height<=0)
 448                 return;
 449
 450         vga_ptr = get_vgaptr(page, x, y);
 451         buffer_ptr = buffer;
 452         for (h = 0; h < height; h++) {
 453                 memcpy(buffer_ptr, vga_ptr, width);
 454                 vga_ptr += screen_pitch;
 455                 buffer_ptr += width;
 456         }
 457
 458 }
 459
 460
 461 void put_block(int page, int x, int y, int width, int height, void *buffer)
 462 {
 463         int h;
 464         unsigned char *vga_ptr, *buffer_ptr;
 465
 466         assert(drawing_enable==1);
 467
 468         if (scale_up) {
 469                 x *= 2;
 470                 y *= 2;
 471                 width *= 2;
 472                 height *= 2;
 473         }
 474
 475         if (x < 0)
 476                 x = 0;
 477         if (y < 0)
 478                 y = 0;
 479         if (y + height >= screen_height)
 480                 height = screen_height - y;
 481         if (x + width >= screen_width)
 482                 width = screen_width - x;
 483         if (width<=0)
 484                 return;
 485         if(height<=0)
 486                 return;
 487
 488         vga_ptr = get_vgaptr(page, x, y);
 489         buffer_ptr = buffer;
 490         for (h = 0; h < height; h++) {
 491                 memcpy(vga_ptr, buffer_ptr, width);
 492                 vga_ptr += screen_pitch;
 493                 buffer_ptr += width;
 494         }
 495         width = ((x+width)>>dirty_block_shift) - (x>>dirty_block_shift) + 1;
 496         height = ((y+height)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 497         x >>= dirty_block_shift;
 498         y >>= dirty_block_shift;
 499         while (width--)
 500                 for (h=0; h<height; h++)
 501                         dirty_blocks[page][(y+h)*25+(x+width)] = 1;
 502 }
 503
 504
 505 void put_text(int page, int x, int y, char *text, int align)
 506 {
 507         int c1;
 508         int t1;
 509         int width;
 510         int cur_x;
 511         int image;
 512
 513         assert(drawing_enable==1);
 514
 515         if (text == NULL || strlen(text) == 0)
 516                 return;
 517         if (font_gobs.num_images == 0)
 518                 return;
 519
 520         width = 0;
 521         c1 = 0;
 522         while (text[c1] != 0) {
 523                 t1 = text[c1];
 524                 c1++;
 525                 if (t1 == ' ') {
 526                         width += 5;
 527                         continue;
 528                 }
 529                 if (t1 >= 33 && t1 <= 34)
 530                         image = t1 - 33;
 531
 532                 else if (t1 >= 39 && t1 <= 41)
 533                         image = t1 - 37;
 534
 535                 else if (t1 >= 44 && t1 <= 59)
 536                         image = t1 - 39;
 537
 538                 else if (t1 >= 64 && t1 <= 90)
 539                         image = t1 - 43;
 540
 541                 else if (t1 >= 97 && t1 <= 122)
 542                         image = t1 - 49;
 543
 544                 else if (t1 == '~')
 545                         image = 74;
 546
 547                 else if (t1 == 0x84)
 548                         image = 75;
 549
 550                 else if (t1 == 0x86)
 551                         image = 76;
 552
 553                 else if (t1 == 0x8e)
 554                         image = 77;
 555
 556                 else if (t1 == 0x8f)
 557                         image = 78;
 558
 559                 else if (t1 == 0x94)
 560                         image = 79;
 561
 562                 else if (t1 == 0x99)
 563                         image = 80;
 564
 565                 else
 566                         continue;
 567                 width += pob_width(image, &font_gobs) + 1;
 568         }
 569
 570         switch (align) {
 571         case 0:
 572                 cur_x = x;
 573                 break;
 574         case 1:
 575                 cur_x = x - width;
 576                 break;
 577         case 2:
 578                 cur_x = x - width / 2;
 579                 break;
 580         default:
 581                 cur_x = 0;      /* this should cause error? -Chuck */
 582                 break;
 583         }
 584         c1 = 0;
 585
 586         while (text[c1] != 0) {
 587                 t1 = text[c1];
 588                 c1++;
 589                 if (t1 == ' ') {
 590                         cur_x += 5;
 591                         continue;
 592                 }
 593                 if (t1 >= 33 && t1 <= 34)
 594                         image = t1 - 33;
 595
 596                 else if (t1 >= 39 && t1 <= 41)
 597                         image = t1 - 37;
 598
 599                 else if (t1 >= 44 && t1 <= 59)
 600                         image = t1 - 39;
 601
 602                 else if (t1 >= 64 && t1 <= 90)
 603                         image = t1 - 43;
 604
 605                 else if (t1 >= 97 && t1 <= 122)
 606                         image = t1 - 49;
 607
 608                 else if (t1 == '~')
 609                         image = 74;
 610
 611                 else if (t1 == 0x84)
 612                         image = 75;
 613
 614                 else if (t1 == 0x86)
 615                         image = 76;
 616
 617                 else if (t1 == 0x8e)
 618                         image = 77;
 619
 620                 else if (t1 == 0x8f)
 621                         image = 78;
 622
 623                 else if (t1 == 0x94)
 624                         image = 79;
 625
 626                 else if (t1 == 0x99)
 627                         image = 80;
 628
 629                 else
 630                         continue;
 631                 put_pob(page, cur_x, y, image, &font_gobs, 1, mask_pic);
 632                 cur_x += pob_width(image, &font_gobs) + 1;
 633         }
 634 }
 635
 636
 637 void put_pob(int page, int x, int y, int image, gob_t *gob, int use_mask, void *mask_pic)
 638 {
 639         int c1, c2;
 640         int pob_x, pob_y;
 641         int width, height;
 642         int draw_width, draw_height;
 643         int colour;
 644         unsigned char *vga_ptr;
 645         unsigned char *pob_ptr;
 646         unsigned char *mask_ptr;
 647
 648         assert(drawing_enable==1);
 649         assert(gob);
 650         assert(image>=0);
 651         assert(image<gob->num_images);
 652
 653         if (scale_up) {
 654                 x *= 2;
 655                 y *= 2;
 656                 width = draw_width = gob->width[image]*2;
 657                 height = draw_height = gob->height[image]*2;
 658                 x -= gob->hs_x[image]*2;
 659                 y -= gob->hs_y[image]*2;
 660         } else {
 661                 width = draw_width = gob->width[image];
 662                 height = draw_height = gob->height[image];
 663                 x -= gob->hs_x[image];
 664                 y -= gob->hs_y[image];
 665         }
 666
 667         if ((x + width) <= 0 || x >= screen_width)
 668                 return;
 669         if ((y + height) <= 0 || y >= screen_height)
 670                 return;
 671
 672         pob_x = 0;
 673         pob_y = 0;
 674         if (x < 0) {
 675                 pob_x -= x;
 676                 draw_width += x;
 677                 x = 0;
 678         }
 679         if ((x + width) > screen_width)
 680                 draw_width -= x + width - screen_width;
 681         if (y < 0) {
 682                 pob_y -= y;
 683                 draw_height += y;
 684                 y = 0;
 685         }
 686         if ((y + height) > screen_height)
 687                 draw_height -= y + height - screen_height;
 688
 689         vga_ptr = get_vgaptr(page, x, y);
 690         pob_ptr = ((unsigned char *)gob->data[image]) + ((pob_y * width) + pob_x);
 691         mask_ptr = ((unsigned char *)mask) + ((y * screen_pitch) + (x));
 692         for (c1 = 0; c1 < draw_height; c1++) {
 693                 for (c2 = 0; c2 < draw_width; c2++) {
 694                         colour = *mask_ptr;
 695                         if (use_mask == 0 || (use_mask == 1 && colour == 0)) {
 696                                 colour = *pob_ptr;
 697                                 if (colour != 0) {
 698                                         *vga_ptr = colour;
 699                                 }
 700                         }
 701                         vga_ptr++;
 702                         pob_ptr++;
 703                         mask_ptr++;
 704                 }
 705                 pob_ptr += width - c2;
 706                 vga_ptr += (screen_width - c2);
 707                 mask_ptr += (screen_width - c2);
 708         }
 709         draw_width = ((x+draw_width)>>dirty_block_shift) - (x>>dirty_block_shift) + 1;
 710         draw_height = ((y+draw_height)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 711         x >>= dirty_block_shift;
 712         y >>= dirty_block_shift;
 713         while (draw_width--)
 714                 for (c1=0; c1<draw_height; c1++)
 715                         dirty_blocks[page][(y+c1)*25+(x+draw_width)] = 1;
 716 }
 717
 718
 719 int pob_width(int image, gob_t *gob)
 720 {
 721         assert(gob);
 722         assert(image>=0);
 723         assert(image<gob->num_images);
 724         return gob->width[image];
 725 }
 726
 727
 728 int pob_height(int image, gob_t *gob)
 729 {
 730         assert(gob);
 731         assert(image>=0);
 732         assert(image<gob->num_images);
 733         return gob->height[image];
 734 }
 735
 736
 737 int pob_hs_x(int image, gob_t *gob)
 738 {
 739         assert(gob);
 740         assert(image>=0);
 741         assert(image<gob->num_images);
 742         return gob->hs_x[image];
 743 }
 744
 745
 746 int pob_hs_y(int image, gob_t *gob)
 747 {
 748         assert(gob);
 749         assert(image>=0);
 750         assert(image<gob->num_images);
 751         return gob->hs_y[image];
 752 }
 753
 754
 755 int read_pcx(unsigned char * handle, void *buf, int buf_len, char *pal)
 756 {
 757         unsigned char *buffer=buf;
 758         short c1;
 759         short a, b;
 760         long ofs1;
 761         if (buffer != 0) {
 762                 handle += 128;
 763                 ofs1 = 0;
 764                 while (ofs1 < buf_len) {
 765                         a = *(handle++);
 766                         if ((a & 0xc0) == 0xc0) {
 767                                 b = *(handle++);
 768                                 a &= 0x3f;
 769                                 for (c1 = 0; c1 < a && ofs1 < buf_len; c1++)
 770                                         buffer[ofs1++] = (char) b;
 771                         } else
 772                                 buffer[ofs1++] = (char) a;
 773                 }
 774                 if (pal != 0) {
 775                         handle++;
 776                         for (c1 = 0; c1 < 768; c1++)
 777                                 pal[c1] = *(handle++) /*fgetc(handle)*/ >> 2;
 778                 }
 779         }
 780         return 0;
 781 }
 782
 783
 784 void register_background(char *pixels, char pal[768])
 785 {
 786         if (background) {
 787                 free(background);
 788                 background = NULL;
 789         }
 790         background_drawn = 0;
 791         if (!pixels)
 792                 return;
 793         assert(pal);
 794         if (scale_up) {
 795                 background = malloc(screen_pitch*screen_height);
 796                 assert(background);
 797                 do_scale2x((unsigned char *)pixels, JNB_WIDTH, JNB_HEIGHT, (unsigned char *)background);
 798         } else {
 799                 background = malloc(JNB_WIDTH*JNB_HEIGHT);
 800                 assert(background);
 801                 memcpy(background, pixels, JNB_WIDTH*JNB_HEIGHT);
 802         }
 803 }
 804
 805 int register_gob(unsigned char *handle, gob_t *gob, int len)
 806 {
 807         unsigned char *gob_data;
 808         int i;
 809
 810         gob_data = malloc(len);
 811         memcpy(gob_data, handle, len);
 812
 813         gob->num_images = (short)((gob_data[0]) + (gob_data[1] << 8));
 814
 815         gob->width = malloc(gob->num_images*sizeof(int));
 816         gob->height = malloc(gob->num_images*sizeof(int));
 817         gob->hs_x = malloc(gob->num_images*sizeof(int));
 818         gob->hs_y = malloc(gob->num_images*sizeof(int));
 819         gob->data = malloc(gob->num_images*sizeof(void *));
 820         gob->orig_data = malloc(gob->num_images*sizeof(void *));
 821         for (i=0; i<gob->num_images; i++) {
 822                 int image_size;
 823                 int offset;
 824
 825                 offset = (gob_data[i*4+2]) + (gob_data[i*4+3] << 8) + (gob_data[i*4+4] << 16) + (gob_data[i*4+5] << 24);
 826
 827                 gob->width[i]  = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
 828                 gob->height[i] = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
 829                 gob->hs_x[i]   = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
 830                 gob->hs_y[i]   = (short)((gob_data[offset]) + (gob_data[offset+1] << 8)); offset += 2;
 831
 832                 image_size = gob->width[i] * gob->height[i];
 833                 gob->orig_data[i] = malloc(image_size);
 834                 memcpy(gob->orig_data[i], &gob_data[offset], image_size);
 835                 if (scale_up) {
 836                         image_size = gob->width[i] * gob->height[i] * 4;
 837                         gob->data[i] = malloc(image_size);
 838                         do_scale2x((unsigned char *)gob->orig_data[i], gob->width[i], gob->height[i], (unsigned char *)gob->data[i]);
 839                 } else {
 840                         gob->data[i] = (unsigned short *)gob->orig_data[i];
 841                 }
 842         }
 843         free(gob_data);
 844         return 0;
 845 }
 846
 847
 848 void recalculate_gob(gob_t *gob, char pal[768])
 849 {
 850 }
 851
 852 void register_mask(void *pixels)
 853 {
 854         if (mask) {
 855                 free(mask);
 856                 mask = NULL;
 857         }
 858         assert(pixels);
 859         if (scale_up) {
 860                 mask = malloc(screen_pitch*screen_height);
 861                 assert(mask);
 862                 do_scale2x((unsigned char *)pixels, JNB_WIDTH, JNB_HEIGHT, (unsigned char *)mask);
 863         } else {
 864                 mask = malloc(JNB_WIDTH*JNB_HEIGHT);
 865                 assert(mask);
 866                 memcpy(mask, pixels, JNB_WIDTH*JNB_HEIGHT);
 867         }
 868 }