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                         int r,g,b,a;
 130
 131                         if (*p == '\0') {
 132                                 SDL_FreeSurface(surface);
 133                                 return NULL;
 134                         }
 135                         r = (pal[*p] >> 16) & 0xff;
 136                         b = (pal[*p] & 0xff);
 137                         g = (pal[*p] >> 8) & 0xff;
 138                         a = (pal[*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 #ifdef __APPLE__
 182         lval = SDL_Init(SDL_INIT_TIMER | SDL_INIT_AUDIO | SDL_INIT_VIDEO);
 183 #else
 184         lval = SDL_Init(SDL_INIT_EVERYTHING | SDL_INIT_AUDIO);
 185 #endif
 186         if (lval < 0) {
 187                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 188                 exit(EXIT_FAILURE);
 189         }
 190
 191         if (scale_up)
 192                 bpp = 16;
 193         else
 194                 bpp = 8;
 195         flags = SDL_SWSURFACE;
 196         if (fullscreen)
 197                 flags |= SDL_FULLSCREEN;
 198         jnb_surface = SDL_SetVideoMode(screen_width, screen_height, bpp, flags);
 199
 200         if (!jnb_surface) {
 201                 fprintf(stderr, "SDL ERROR: %s\n", SDL_GetError());
 202                 exit(EXIT_FAILURE);
 203         }
 204
 205         if(fullscreen)
 206                 SDL_ShowCursor(0);
 207         else
 208                 SDL_ShowCursor(1);
 209
 210         SDL_WM_SetCaption("Jump n Bump","");
 211
 212         icon=load_xpm_from_array(jumpnbump_xpm);
 213         if (icon==NULL) {
 214             printf("Couldn't load icon\n");
 215         } else {
 216             SDL_WM_SetIcon(icon,NULL);
 217         }
 218
 219         vinited = 1;
 220
 221         memset(current_pal, 0, sizeof(current_pal));
 222         memset(dirty_blocks, 0, sizeof(dirty_blocks));
 223
 224         screen_buffer[0]=malloc(screen_width*screen_height*bytes_per_pixel);
 225         screen_buffer[1]=malloc(screen_width*screen_height*bytes_per_pixel);
 226
 227 /*
 228         dirty_blocks[0]=malloc(sizeof(int)*25*16+1000);
 229         dirty_blocks[1]=malloc(sizeof(int)*25*16+1000);
 230 */
 231
 232         return;
 233 }
 234
 235
 236 void fs_toggle()
 237 {
 238         if (!vinited) {
 239                 fullscreen ^= 1;
 240                 return;
 241         }
 242         if (SDL_WM_ToggleFullScreen(jnb_surface))
 243                 fullscreen ^= 1;
 244 }
 245
 246
 247 void wait_vrt(int mix)
 248 {
 249         return;
 250 }
 251
 252
 253 void clear_page(int page, int color)
 254 {
 255         int i,j;
 256
 257         assert(drawing_enable==1);
 258
 259         for (i=0; i<(25*16); i++)
 260                 dirty_blocks[page][i] = 1;
 261
 262         if (bytes_per_pixel==1) {
 263                 unsigned char *buf = get_vgaptr(page, 0, 0);
 264
 265                 for (i=0; i<screen_height; i++)
 266                         for (j=0; j<screen_width; j++)
 267                                 *buf++ = color;
 268         } else if (bytes_per_pixel==2) {
 269                 unsigned short *buf = get_vgaptr(page, 0, 0);
 270
 271                 for (i=0; i<screen_height; i++)
 272                         for (j=0; j<screen_width; j++)
 273                                 *buf++ = color;
 274         } else {
 275                 unsigned int *buf = get_vgaptr(page, 0, 0);
 276
 277                 for (i=0; i<screen_height; i++)
 278                         for (j=0; j<screen_width; j++)
 279                                 *buf++ = color;
 280         }
 281 }
 282
 283
 284 void clear_lines(int page, int y, int count, int color)
 285 {
 286         int i,j;
 287
 288         assert(drawing_enable==1);
 289
 290         if (scale_up) {
 291                 count *= 2;
 292                 y *= 2;
 293         }
 294
 295         if (bytes_per_pixel==1) {
 296                 for (i=0; i<count; i++) {
 297                         if ((i+y)<screen_height) {
 298                                 unsigned char *buf = get_vgaptr(page, 0, i+y);
 299                                 for (j=0; j<screen_width; j++)
 300                                         *buf++ = color;
 301                         }
 302                 }
 303         } else if (bytes_per_pixel==2) {
 304                 for (i=0; i<count; i++) {
 305                         if ((i+y)<screen_height) {
 306                                 unsigned short *buf = get_vgaptr(page, 0, i+y);
 307                                 for (j=0; j<screen_width; j++)
 308                                         *buf++ = color;
 309                         }
 310                 }
 311         } else {
 312                 for (i=0; i<count; i++) {
 313                         if ((i+y)<screen_height) {
 314                                 unsigned int *buf = get_vgaptr(page, 0, i+y);
 315                                 for (j=0; j<screen_width; j++)
 316                                         *buf++ = color;
 317                         }
 318                 }
 319         }
 320         count = ((y+count)>>dirty_block_shift) - (y>>dirty_block_shift) + 1;
 321         y >>= dirty_block_shift;
 322         for (i=0; i<count; i++)
 323                 for (j=0; j<25; j++)
 324                         dirty_blocks[page][(y+i)*25+j] = 1;
 325 }
 326
 327
 328 int get_color(int color, char pal[768])
 329 {
 330         assert(color<256);
 331         assert(pal);
 332         return SDL_MapRGB(jnb_surface->format, (Uint8)(pal[color*3+0]<<2), (Uint8)(pal[color*3+1]<<2), (Uint8)(pal[color*3+2]<<2));
 333 }
 334
 335
 336 int get_pixel(int page, int x, int y)
 337 {
 338         assert(drawing_enable==1);
 339
 340         if (scale_up) {
 341                 x *= 2;
 342                 y *= 2;
 343         }
 344
 345         assert(x<screen_width);
 346         assert(y<screen_height);
 347
 348         if (bytes_per_pixel==1)
 349                 return *(unsigned char *)get_vgaptr(page, x, y);
 350         else if (bytes_per_pixel==2)
 351                 return *(unsigned short *)get_vgaptr(page, x, y);
 352         else
 353                 return *(unsigned int *)get_vgaptr(page, x, y);
 354 }
 355
 356
 357 void set_pixel(int page, int x, int y, int color)
 358 {
 359         assert(drawing_enable==1);
 360
 361         if (scale_up) {
 362                 x *= 2;
 363                 y *= 2;
 364         }
 365
 366         assert(x<screen_width);
 367         assert(y<screen_height);
 368
 369         dirty_blocks[page][(y>>dirty_block_shift)*25+(x>>dirty_block_shift)] = 1;
 370
 371         if (bytes_per_pixel==1)
 372                 *(unsigned char *)get_vgaptr(page, x, y) = color;
 373         else if (bytes_per_pixel==2)
 374                 *(unsigned short *)get_vgaptr(page, x, y) = color;
 375         else
 376                 *(unsigned int *)get_vgaptr(page, x, y) = color;
 377 }
 378
 379
 380 static unsigned int colorMask = 0xF7DEF7DE;
 381 static unsigned int lowPixelMask = 0x08210821;
 382 static unsigned int qcolorMask = 0xE79CE79C;
 383 static unsigned int qlowpixelMask = 0x18631863;
 384 static unsigned int redblueMask = 0xF81F;
 385 static unsigned int greenMask = 0x7E0;
 386
 387 int Init_2xSaI (unsigned int BitFormat)
 388 {
 389     if (BitFormat == 565)
 390     {
 391         colorMask = SDL_SwapLE32(0xF7DEF7DE);
 392         lowPixelMask = SDL_SwapLE32(0x08210821);
 393         qcolorMask = SDL_SwapLE32(0xE79CE79C);
 394         qlowpixelMask = SDL_SwapLE32(0x18631863);
 395         redblueMask = SDL_SwapLE16(0xF81F);
 396         greenMask = SDL_SwapLE16(0x7E0);
 397     }
 398     else if (BitFormat == 555)
 399     {
 400         colorMask = SDL_SwapLE32(0x7BDE7BDE);
 401         lowPixelMask = SDL_SwapLE32(0x04210421);
 402         qcolorMask = SDL_SwapLE32(0x739C739C);
 403         qlowpixelMask = SDL_SwapLE32(0x0C630C63);
 404         redblueMask = SDL_SwapLE16(0x7C1F);
 405         greenMask = SDL_SwapLE16(0x3E0);
 406     }
 407     else
 408     {
 409         return 0;
 410     }
 411
 412 #ifdef MMX
 413     Init_2xSaIMMX (BitFormat);
 414 #endif
 415
 416     return 1;
 417 }
 418
 419
 420 void Scale2x (unsigned char *src, unsigned int src_pitch, int src_bytes_per_pixel,
 421                  unsigned char *dst, unsigned int dst_pitch, int dst_bytes_per_pixel,
 422                  int width, int height, int pal[256])
 423 {
 424 #define GET_COLOR(x) (pal[(x)])
 425
 426         int x,y;
 427         unsigned char *src_line;
 428         unsigned char *dst_line[2];
 429
 430         src_line = src;
 431         dst_line[0] = dst;
 432         dst_line[1] = dst + dst_pitch;
 433         for (y=0; y<height; y++) {
 434                 for (x=0; x<width; x++) {
 435                         int color;
 436
 437                         if (src_bytes_per_pixel == 1) {
 438                                 color = GET_COLOR(*(((unsigned char*)src_line) + x));
 439                         } else if (src_bytes_per_pixel == 2) {
 440                                 color = *(((unsigned short*)src_line) + x);
 441                         } else {
 442                                 color = *(((unsigned int*)src_line) + x);
 443                         }
 444
 445                         if (dst_bytes_per_pixel == 2) {
 446                                 *((unsigned long *) (&dst_line[0][x * 4])) = color | (color << 16);
 447                                 *((unsigned long *) (&dst_line[1][x * 4])) = color | (color << 16);
 448                         } else {
 449                                 *((unsigned long *) (&dst_line[0][x * 8])) = color;
 450                                 *((unsigned long *) (&dst_line[0][x * 8 + 4])) = color;
 451                                 *((unsigned long *) (&dst_line[1][x * 8])) = color;
 452                                 *((unsigned long *) (&dst_line[1][x * 8 + 4])) = color;
 453                         }
 454                 }
 455
 456                 src_line += src_pitch;
 457
 458                 if (y < height - 1) {
 459                         dst_line[0] += dst_pitch * 2;
 460                         dst_line[1] += dst_pitch * 2;
 461                 }
 462         }
 463 }
 464
 465
 466 void Super2xSaI (unsigned char *src, unsigned int src_pitch, int src_bytes_per_pixel,
 467                  unsigned char *dst, unsigned int dst_pitch, int dst_bytes_per_pixel,
 468                  int width, int height, int pal[256])
 469 {
 470 #define GET_RESULT(A, B, C, D) ((A != C || A != D) - (B != C || B != D))
 471
 472 #define INTERPOLATE(A, B) (((A & colorMask) >> 1) + ((B & colorMask) >> 1) + (A & B & lowPixelMask))
 473
 474 #define Q_INTERPOLATE(A, B, C, D) ((A & qcolorMask) >> 2) + ((B & qcolorMask) >> 2) + ((C & qcolorMask) >> 2) + ((D & qcolorMask) >> 2) \
 475         + ((((A & qlowpixelMask) + (B & qlowpixelMask) + (C & qlowpixelMask) + (D & qlowpixelMask)) >> 2) & qlowpixelMask)
 476
 477 #define GET_COLOR(x) (pal[(x)])
 478
 479         unsigned char *src_line[4];
 480         unsigned char *dst_line[2];
 481         int x, y;
 482         unsigned long color[16];
 483
 484         if ( (width<2) || (height<2) ) {
 485                 Scale2x(src, src_pitch, src_bytes_per_pixel, dst, dst_pitch, dst_bytes_per_pixel, width, height, pal);
 486                 return;
 487         }
 488
 489         /* Point to the first 3 lines. */
 490         src_line[0] = src;
 491         src_line[1] = src;
 492         src_line[2] = src + src_pitch;
 493         src_line[3] = src + (src_pitch * 2);
 494
 495         dst_line[0] = dst;
 496         dst_line[1] = dst + dst_pitch;
 497
 498         x = 0, y = 0;
 499
 500         if (src_bytes_per_pixel == 1) {
 501                 unsigned char *sbp;
 502                 sbp = src_line[0];
 503                 color[0] = GET_COLOR(*sbp);       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 504                 color[4] = color[0];   color[5] = color[0];   color[6] = GET_COLOR(*(sbp + 1));  color[7] = GET_COLOR(*(sbp + 2));
 505                 sbp = src_line[2];
 506                 color[8] = GET_COLOR(*sbp);     color[9] = color[8];     color[10] = GET_COLOR(*(sbp + 1)); color[11] = GET_COLOR(*(sbp + 2));
 507                 sbp = src_line[3];
 508                 color[12] = GET_COLOR(*sbp);    color[13] = color[12];   color[14] = GET_COLOR(*(sbp + 1)); color[15] = GET_COLOR(*(sbp + 2));
 509         } else if (src_bytes_per_pixel == 2) {
 510                 unsigned short *sbp;
 511                 sbp = (unsigned short*)src_line[0];
 512                 color[0] = *sbp;       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 513                 color[4] = color[0];   color[5] = color[0];   color[6] = *(sbp + 1);  color[7] = *(sbp + 2);
 514                 sbp = (unsigned short*)src_line[2];
 515                 color[8] = *sbp;     color[9] = color[8];     color[10] = *(sbp + 1); color[11] = *(sbp + 2);
 516                 sbp = (unsigned short*)src_line[3];
 517                 color[12] = *sbp;    color[13] = color[12];   color[14] = *(sbp + 1); color[15] = *(sbp + 2);
 518         } else {
 519                 unsigned long *lbp;
 520                 lbp = (unsigned long*)src_line[0];
 521                 color[0] = *lbp;       color[1] = color[0];   color[2] = color[0];    color[3] = color[0];
 522                 color[4] = color[0];   color[5] = color[0];   color[6] = *(lbp + 1);  color[7] = *(lbp + 2);
 523                 lbp = (unsigned long*)src_line[2];
 524                 color[8] = *lbp;     color[9] = color[8];     color[10] = *(lbp + 1); color[11] = *(lbp + 2);
 525                 lbp = (unsigned long*)src_line[3];
 526                 color[12] = *lbp;    color[13] = color[12];   color[14] = *(lbp + 1); color[15] = *(lbp + 2);
 527         }
 528
 529         for (y = 0; y < height; y++) {
 530
 531                 /* Todo: x = width - 2, x = width - 1 */
 532
 533                 for (x = 0; x < width; x++) {
 534                         unsigned long product1a, product1b, product2a, product2b;
 535
 536 //---------------------------------------  B0 B1 B2 B3    0  1  2  3
 537 //                                         4  5* 6  S2 -> 4  5* 6  7
 538 //                                         1  2  3  S1    8  9 10 11
 539 //                                         A0 A1 A2 A3   12 13 14 15
 540 //--------------------------------------
 541                         if (color[9] == color[6] && color[5] != color[10]) {
 542                                 product2b = color[9];
 543                                 product1b = product2b;
 544                         }
 545                         else if (color[5] == color[10] && color[9] != color[6]) {
 546                                 product2b = color[5];
 547                                 product1b = product2b;
 548                         }
 549                         else if (color[5] == color[10] && color[9] == color[6]) {
 550                                 int r = 0;
 551
 552                                 r += GET_RESULT(color[6], color[5], color[8], color[13]);
 553                                 r += GET_RESULT(color[6], color[5], color[4], color[1]);
 554                                 r += GET_RESULT(color[6], color[5], color[14], color[11]);
 555                                 r += GET_RESULT(color[6], color[5], color[2], color[7]);
 556
 557                                 if (r > 0)
 558                                         product1b = color[6];
 559                                 else if (r < 0)
 560                                         product1b = color[5];
 561                                 else
 562                                         product1b = INTERPOLATE(color[5], color[6]);
 563
 564                                 product2b = product1b;
 565
 566                         }
 567                         else {
 568                                 if (color[6] == color[10] && color[10] == color[13] && color[9] != color[14] && color[10] != color[12])
 569                                         product2b = Q_INTERPOLATE(color[10], color[10], color[10], color[9]);
 570                                 else if (color[5] == color[9] && color[9] == color[14] && color[13] != color[10] && color[9] != color[15])
 571                                         product2b = Q_INTERPOLATE(color[9], color[9], color[9], color[10]);
 572                                 else
 573                                         product2b = INTERPOLATE(color[9], color[10]);
 574
 575                                 if (color[6] == color[10] && color[6] == color[1] && color[5] != color[2] && color[6] != color[0])
 576                                         product1b = Q_INTERPOLATE(color[6], color[6], color[6], color[5]);
 577                                 else if (color[5] == color[9] && color[5] == color[2] && color[1] != color[6] && color[5] != color[3])
 578                                         product1b = Q_INTERPOLATE(color[6], color[5], color[5], color[5]);
 579                                 else
 580                                         product1b = INTERPOLATE(color[5], color[6]);
 581                         }
 582
 583                         if (color[5] == color[10] && color[9] != color[6] && color[4] == color[5] && color[5] != color[14])
 584                                 product2a = INTERPOLATE(color[9], color[5]);
 585                         else if (color[5] == color[8] && color[6] == color[5] && color[4] != color[9] && color[5] != color[12])
 586                                 product2a = INTERPOLATE(color[9], color[5]);
 587                         else
 588                                 product2a = color[9];
 589
 590                         if (color[9] == color[6] && color[5] != color[10] && color[8] == color[9] && color[9] != color[2])
 591                                 product1a = INTERPOLATE(color[9], color[5]);
 592                         else if (color[4] == color[9] && color[10] == color[9] && color[8] != color[5] && color[9] != color[0])
 593                                 product1a = INTERPOLATE(color[9], color[5]);
 594                         else
 595                                 product1a = color[5];
 596
 597                         if (dst_bytes_per_pixel == 2) {
 598                                 *((unsigned long *) (&dst_line[0][x * 4])) = product1a | (product1b << 16);
 599                                 *((unsigned long *) (&dst_line[1][x * 4])) = product2a | (product2b << 16);
 600                         } else {
 601                                 *((unsigned long *) (&dst_line[0][x * 8])) = product1a;
 602                                 *((unsigned long *) (&dst_line[0][x * 8 + 4])) = product1b;
 603                                 *((unsigned long *) (&dst_line[1][x * 8])) = product2a;
 604                                 *((unsigned long *) (&dst_line[1][x * 8 + 4])) = product2b;
 605                         }
 606
 607                         /* Move color matrix forward */
 608                         color[0] = color[1]; color[4] = color[5]; color[8] = color[9];   color[12] = color[13];
 609                         color[1] = color[2]; color[5] = color[6]; color[9] = color[10];  color[13] = color[14];
 610                         color[2] = color[3]; color[6] = color[7]; color[10] = color[11]; color[14] = color[15];
 611
 612                         if (x < width - 3) {
 613                                 x+=3;
 614                                 if (src_bytes_per_pixel == 1) {
 615                                         color[3] = GET_COLOR(*(((unsigned char*)src_line[0]) + x));
 616                                         color[7] = GET_COLOR(*(((unsigned char*)src_line[1]) + x));
 617                                         color[11] = GET_COLOR(*(((unsigned char*)src_line[2]) + x));
 618                                         color[15] = GET_COLOR(*(((unsigned char*)src_line[3]) + x));
 619                                 } else if (src_bytes_per_pixel == 2) {
 620                                         color[3] = *(((unsigned short*)src_line[0]) + x);
 621                                         color[7] = *(((unsigned short*)src_line[1]) + x);
 622                                         color[11] = *(((unsigned short*)src_line[2]) + x);
 623                                         color[15] = *(((unsigned short*)src_line[3]) + x);
 624                                 } else {
 625                                         color[3] = *(((unsigned long*)src_line[0]) + x);
 626                                         color[7] = *(((unsigned long*)src_line[1]) + x);
 627                                         color[11] = *(((unsigned long*)src_line[2]) + x);
 628                                         color[15] = *(((unsigned long*)src_line[3]) + x);
 629                                 }
 630                                 x-=3;
 631                         }
 632                 }
 633
 634                 /* We're done with one line, so we shift the source lines up */
 635                 src_line[0] = src_line[1];
 636                 src_line[1] = src_line[2];
 637                 src_line[2] = src_line[3];
 638
 639                 /* Read next line */
 640                 if (y + 3 >= height)
 641                         src_line[3] = src_line[2];
 642                 else
 643                         src_line[3] = src_line[2] + src_pitch;
 644
 645                 /* Then shift the color matrix up */
 646                 if (src_bytes_per_pixel == 1) {
 647                         unsigned char *sbp;
 648                         sbp = src_line[0];
 649                         color[0] = GET_COLOR(*sbp);     color[1] = color[0];    color[2] = GET_COLOR(*(sbp + 1));  color[3] = GET_COLOR(*(sbp + 2));
 650                         sbp = src_line[1];
 651                         color[4] = GET_COLOR(*sbp);     color[5] = color[4];    color[6] = GET_COLOR(*(sbp + 1));  color[7] = GET_COLOR(*(sbp + 2));
 652                         sbp = src_line[2];
 653                         color[8] = GET_COLOR(*sbp);     color[9] = color[8];    color[10] = GET_COLOR(*(sbp + 1)); color[11] = GET_COLOR(*(sbp + 2));
 654                         sbp = src_line[3];
 655                         color[12] = GET_COLOR(*sbp);    color[13] = color[12];  color[14] = GET_COLOR(*(sbp + 1)); color[15] = GET_COLOR(*(sbp + 2));
 656                 } else if (src_bytes_per_pixel == 2) {
 657                         unsigned short *sbp;
 658                         sbp = (unsigned short*)src_line[0];
 659                         color[0] = *sbp;     color[1] = color[0];    color[2] = *(sbp + 1);  color[3] = *(sbp + 2);
 660                         sbp = (unsigned short*)src_line[1];
 661                         color[4] = *sbp;     color[5] = color[4];    color[6] = *(sbp + 1);  color[7] = *(sbp + 2);
 662                         sbp = (unsigned short*)src_line[2];
 663                         color[8] = *sbp;     color[9] = color[9];    color[10] = *(sbp + 1); color[11] = *(sbp + 2);
 664                         sbp = (unsigned short*)src_line[3];
 665                         color[12] = *sbp;    color[13] = color[12];  color[14] = *(sbp + 1); color[15] = *(sbp + 2);
 666                 } else {
 667                         unsigned long *lbp;
 668                         lbp = (unsigned long*)src_line[0];
 669                         color[0] = *lbp;     color[1] = color[0];    color[2] = *(lbp + 1);  color[3] = *(lbp + 2);
 670                         lbp = (unsigned long*)src_line[1];
 671                         color[4] = *lbp;     color[5] = color[4];    color[6] = *(lbp + 1);  color[7] = *(lbp + 2);
 672                         lbp = (unsigned long*)src_line[2];
 673                         color[8] = *lbp;     color[9] = color[9];    color[10] = *(lbp + 1); color[11] = *(lbp + 2);
 674                         lbp = (unsigned long*)src_line[3];
 675                         color[12] = *lbp;    color[13] = color[12];  color[14] = *(lbp + 1); color[15] = *(lbp + 2);
 676                 }
 677
 678                 if (y < height - 1) {
 679                         dst_line[0] += dst_pitch * 2;
 680                         dst_line[1] += dst_pitch * 2;
 681                 }
 682         }
 683 }
 684
 685
 686 void flippage(int page)
 687 {
 688         int x,y;
 689         unsigned char *src;
 690         unsigned char *dest;
 691
 692         assert(drawing_enable==0);
 693
 694         SDL_LockSurface(jnb_surface);
 695         if (!jnb_surface->pixels) {
 696
 697                 for (x=0; x<(25*16); x++) {
 698                         dirty_blocks[0][x] = 1;
 699                         dirty_blocks[1][x] = 1;
 700                 }
 701
 702                 return;
 703         }
 704 #ifdef SCALE_UP
 705         dest=(unsigned char *)jnb_surface->pixels;
 706         src=screen_buffer[page];
 707         Super2xSaI(src, JNB_WIDTH, 1, dest, jnb_surface->pitch, 2, JNB_WIDTH, JNB_HEIGHT, current_pal);
 708 #else
 709         dest=(unsigned char *)jnb_surface->pixels;
 710         src=screen_buffer[page];
 711         for (y=0; y<screen_height; y++) {
 712                 //memset(&dest[y*jnb_surface->pitch],0,JNB_SURFACE_WIDTH*bytes_per_pixel);
 713                 for (x=0; x<25; x++) {
 714                         int count;
 715                         int test_x;
 716
 717                         count=0;
 718                         test_x=x;
 719                         while ( (test_x<25) && (dirty_blocks[page][(y>>dirty_block_shift)*25+test_x]) ) {
 720                                 count++;
 721                                 test_x++;
 722                         }
 723                         if (count) {
 724                                 memcpy( &dest[y*jnb_surface->pitch+(x<<dirty_block_shift)*bytes_per_pixel],
 725                                         &src[y*screen_pitch+((x<<dirty_block_shift)*bytes_per_pixel)],
 726                                         ((16<<dirty_block_shift)>>4)*bytes_per_pixel*count);
 727                                 //*((pixel_t *)(&dest[(y>>dirty_block_shift)*jnb_surface->pitch+x*bytes_per_pixel]))=0xe0e0;
 728                         }
 729                         x = test_x;
 730                 }
 731         }
 732         memset(&dirty_blocks[page], 0, sizeof(int)*25*16);
 733 #endif
 734         SDL_UnlockSurface(jnb_surface);
 735         SDL_Flip(jnb_surface);
 736 }
 737
 738
 739 void draw_begin(void)
 740 {
 741         assert(drawing_enable==0);
 742
 743         drawing_enable = 1;
 744         if (background_drawn == 0) {
 745                 if (background) {
 746                         put_block(0, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 747                         put_block(1, 0, 0, JNB_WIDTH, JNB_HEIGHT, background);
 748                         //put_block(0, 0, 0, rabbit_gobs.width[1], rabbit_gobs.height[1], rabbit_gobs.data[1]);
 749                         //put_block(1, 0, 0, rabbit_gobs.width[1], rabbit_gobs.height[1], rabbit_gobs.data[1]);
 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(FILE * 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                 fseek(handle, 128, SEEK_CUR);
1197                 ofs1 = 0;
1198                 while (ofs1 < buf_len) {
1199                         a = fgetc(handle);
1200                         if ((a & 0xc0) == 0xc0) {
1201                                 b = fgetc(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                         fseek(handle, 1, SEEK_CUR);
1210                         for (c1 = 0; c1 < 768; c1++)
1211                                 pal[c1] = 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(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(FILE *handle, gob_t *gob, int len)
1246 {
1247         unsigned char *gob_data;
1248         int i;
1249
1250         gob_data = malloc(len);
1251         fread(gob_data, 1, len, handle);
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 }