graphics.c

   1
   2 /**
   3  *
   4  * Tennix! SDL Port
   5  * Copyright (C) 2003, 2007, 2008, 2009 Thomas Perl <thp@thpinfo.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License
   9  * as published by the Free Software Foundation; either version 2
  10  * of the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  20  * MA  02110-1301, USA.
  21  *
  22  **/
  23
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26 #include <math.h>
  27 #include <unistd.h>
  28 #include <assert.h>
  29
  30 #include "tennix.h"
  31 #include "graphics.h"
  32 #include "archive.h"
  33 #include "sound.h"
  34
  35 static Image* images;
  36
  37 static SDL_Surface *buffer;
  38 static SDL_Surface *background;
  39
  40 static SDL_Rect *rect_update_cache;
  41 static SDL_Rect *rect_update_old;
  42 static int rect_update_cache_current;
  43 static int rect_update_old_count;
  44
  45 Uint32 fading_start = 0;
  46
  47 static char* graphics[] = {
  48     "court.png",
  49     "shadow.png",
  50     "player-racket.png",
  51     "ball.png",
  52     "smallish-font.png",
  53     "dkc2.png",
  54     "referee.png",
  55     "ctt_hard.png",
  56     "ctt_clay.png",
  57     "ctt_grass.png",
  58     "sidebar.png",
  59     "tennixlogo.png",
  60     "btnplay.png",
  61     "btnresume.png",
  62     "btnquit.png",
  63     "stadium.png",
  64     "fog.png",
  65     "fog2.png",
  66     "night.png",
  67     "talk.png"
  68 };
  69
  70 void init_graphics() {
  71     int i;
  72     char *d;
  73     SDL_Surface* data;
  74     SDL_Surface* tmp;
  75     TennixArchive *tnxar;
  76
  77     rect_update_cache = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  78     rect_update_old = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  79     rect_update_cache_current = 0;
  80     rect_update_old_count = 0;
  81
  82     images = (Image*)calloc( GR_COUNT, sizeof( Image));
  83
  84     buffer = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT,
  85                  screen->format->BitsPerPixel,
  86                  screen->format->Rmask,
  87                  screen->format->Gmask,
  88                  screen->format->Bmask,
  89                  screen->format->Amask);
  90
  91     background = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT,
  92                      screen->format->BitsPerPixel,
  93                      screen->format->Rmask,
  94                      screen->format->Gmask,
  95                      screen->format->Bmask,
  96                      screen->format->Amask);
  97
  98     if( buffer == NULL) {
  99         fprintf( stderr, "Cannot create buffer surface: %s\n", SDL_GetError());
 100     }
 101
 102     tnxar = tnxar_open(ARCHIVE_FILE);
 103     if (tnxar == NULL) {
 104         /* not found in cwd - try installed... */
 105         tnxar = tnxar_open(ARCHIVE_FILE_INSTALLED);
 106         assert(tnxar != NULL);
 107     }
 108
 109     draw_button(40, (HEIGHT-40)/2, WIDTH-80, 40, 100, 100, 100, 1);
 110     store_screen();
 111     updatescr();
 112
 113     for( i=0; i<GR_COUNT; i++) {
 114         if (tnxar_set_current_filename(tnxar, graphics[i]) != 0) {
 115             d = tnxar_read_current(tnxar);
 116             tmp = IMG_Load_RW(SDL_RWFromMem(d, tnxar_size_current(tnxar)), 0);
 117             free(d);
 118         } else {
 119             fprintf(stderr, "Cannot find file: %s\n", graphics[i]);
 120             exit(EXIT_FAILURE);
 121         }
 122         if( !tmp) {
 123             fprintf( stderr, "Error: %s\n", SDL_GetError());
 124             continue;
 125         }
 126
 127         if( GRAPHICS_IS_FONT(i)) {
 128             /* Convert to RGB w/ colorkey=black for opacity support */
 129             SDL_SetColorKey( tmp, SDL_SRCCOLORKEY | SDL_RLEACCEL, SDL_MapRGB( tmp->format, 0, 0, 0));
 130             data = SDL_ConvertSurface( tmp, screen->format, SDL_SRCCOLORKEY | SDL_RLEACCEL);
 131         } else {
 132             /* Convert to RGBA for alpha channel from PNG */
 133             data = SDL_DisplayFormatAlpha( tmp);
 134         }
 135         SDL_FreeSurface( tmp);
 136
 137         if( !data) {
 138             fprintf( stderr, "Error: %s\n", SDL_GetError());
 139             continue;
 140         }
 141         images[i].data = data;
 142
 143         draw_button(40, (HEIGHT-40)/2, (WIDTH-80)*i/(GR_COUNT+SOUND_MAX), 40, 100, 250, 100, 0);
 144         rectangle(40+BUTTON_BORDER*2, (HEIGHT-40)/2+20+BUTTON_BORDER, (WIDTH-80)*i/(GR_COUNT+SOUND_MAX)-BUTTON_BORDER*2, 10, 170, 250, 170);
 145         updatescr();
 146     }
 147     tnxar_close(tnxar);
 148 }
 149
 150 void uninit_graphics() {
 151     int i;
 152
 153     for( i=0; i<GR_COUNT; i++) {
 154         SDL_FreeSurface( images[i].data);
 155     }
 156
 157     if( buffer != NULL) {
 158         SDL_FreeSurface( buffer);
 159     }
 160
 161     if (background != NULL) {
 162         SDL_FreeSurface(background);
 163     }
 164
 165     free(rect_update_cache);
 166     free(rect_update_old);
 167     free(images);
 168 }
 169
 170 int get_image_width( image_id id) {
 171     return images[id].data->w;
 172 }
 173
 174 int get_image_height( image_id id) {
 175     return images[id].data->h;
 176 }
 177
 178 int get_sprite_width( image_id id, int items) {
 179     return images[id].data->w / items;
 180 }
 181
 182 void show_sprite( image_id id, int pos, int items, int x_offset, int y_offset, int opacity) {
 183     SDL_Surface *bitmap;
 184     SDL_Rect src, dst;
 185
 186     bitmap = images[id].data;
 187
 188     if( !bitmap) return;
 189
 190     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 191
 192     dst.w = src.w = bitmap->w/items;
 193     dst.h = src.h = bitmap->h;
 194     src.x = src.w*pos;
 195     src.y = 0;
 196     dst.x = x_offset;
 197     dst.y = y_offset;
 198
 199     SDL_BlitSurface( bitmap, &src, screen, &dst);
 200     update_rect2(dst);
 201 }
 202
 203 void fill_image_offset( image_id id, int x, int y, int w, int h, int offset_x, int offset_y) {
 204     SDL_Surface *bitmap;
 205     SDL_Rect src, dst;
 206     int dx = 0, dy = 0, cx, cy;
 207
 208     if( id >= GR_COUNT) return;
 209
 210     bitmap = images[id].data;
 211
 212     /* Make negative offsets positive */
 213     if (offset_x < 0) {
 214         offset_x = (offset_x%bitmap->w)+bitmap->w;
 215     }
 216     if (offset_y < 0) {
 217         offset_y = (offset_y%bitmap->h)+bitmap->h;
 218     }
 219
 220     src.y = offset_y % bitmap->h;
 221     while( dy < h) {
 222         src.h = dst.h = cy = (h-dy > bitmap->h-src.y)?(bitmap->h-src.y):(h-dy);
 223         dst.y = y+dy;
 224
 225         dx = 0;
 226         src.x = offset_x % bitmap->w;
 227         while( dx < w) {
 228             src.w = dst.w = cx = (w-dx > bitmap->w-src.x)?(bitmap->w-src.x):(w-dx);
 229             dst.x = x+dx;
 230
 231             SDL_BlitSurface( bitmap, &src, screen, &dst);
 232             update_rect2(dst);
 233
 234             dx += cx;
 235             src.x = 0;
 236         }
 237
 238         dy += cy;
 239         src.y = 0;
 240     }
 241 }
 242
 243 void line_horiz( int y, Uint8 r, Uint8 g, Uint8 b) {
 244     rectangle(0, y, screen->w, 1, r, g, b);
 245 }
 246
 247 void line_vert( int x, Uint8 r, Uint8 g, Uint8 b) {
 248     rectangle(x, 0, 1, screen->h, r, g, b);
 249 }
 250
 251 void rectangle( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b) {
 252     Uint32 color = SDL_MapRGB( screen->format, r, g, b);
 253     SDL_Rect rect;
 254
 255     rect.x = x;
 256     rect.y = y;
 257     rect.w = w;
 258     rect.h = h;
 259
 260     SDL_FillRect( screen, &rect, color);
 261     update_rect(x, y, w, h);
 262 }
 263
 264 void draw_button( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 265     float diff = (pressed?1.0-BUTTON_HIGHLIGHT:1.0+BUTTON_HIGHLIGHT);
 266     rectangle(x, y, w, h, MIN(r*diff, 255), MIN(g*diff, 255), MIN(b*diff, 255));
 267     rectangle(x+BUTTON_BORDER, y+BUTTON_BORDER, w-BUTTON_BORDER, h-BUTTON_BORDER, MIN(r/diff, 255), MIN(g/diff, 255), MIN(b/diff, 255));
 268     rectangle(x+BUTTON_BORDER, y+BUTTON_BORDER, w-2*BUTTON_BORDER, h-2*BUTTON_BORDER, r, g, b);
 269 }
 270
 271 void draw_button_text( char* s, int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 272     int font_x, font_y;
 273     pressed = pressed?1:0;
 274     draw_button( x, y, w, h, r, g, b, pressed);
 275     font_x = x + w/2 - font_get_string_width( GR_SMALLISH_FONT, s)/2 + pressed*BUTTON_BORDER;
 276     font_y = y + h/2 - get_image_height( GR_SMALLISH_FONT)/2 + pressed*BUTTON_BORDER;
 277     font_draw_string( GR_SMALLISH_FONT, s, font_x, font_y, 0, 0);
 278 }
 279
 280 void clear_screen()
 281 {
 282     SDL_Rect rect;
 283
 284     rect.x = rect.y = 0;
 285     rect.w = WIDTH;
 286     rect.h = HEIGHT;
 287
 288     SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 289 }
 290
 291 void store_screen()
 292 {
 293     SDL_BlitSurface(screen, NULL, background, NULL);
 294     rect_update_old[0].x = rect_update_old[0].y = 0;
 295     rect_update_old[0].w = WIDTH;
 296     rect_update_old[0].h = HEIGHT;
 297     rect_update_old_count = 1;
 298     rect_update_cache_current = 0;
 299 }
 300
 301 void reset_screen()
 302 {
 303     int i;
 304     SDL_Rect* tmp;
 305     SDL_BlitSurface(background, NULL, screen, NULL);
 306
 307     for (i=0; i<rect_update_cache_current; i++) {
 308         SDL_BlitSurface(background, &rect_update_cache[i], screen, &rect_update_cache[i]);
 309     }
 310
 311     /* Save rects I've just updated for redraw later */
 312     tmp = rect_update_cache;
 313     rect_update_cache = rect_update_old;
 314     rect_update_old = tmp;
 315     rect_update_old_count = rect_update_cache_current;
 316     rect_update_cache_current = 0;
 317 }
 318
 319 void update_rect(Sint32 x, Sint32 y, Sint32 w, Sint32 h)
 320 {
 321     static int inside = 0;
 322     if (inside) return;
 323     inside = 1;
 324
 325 #ifdef DRAW_UPDATE_RECTANGLE
 326     rectangle(x, y, w, h, 50+rand()%200, 50+rand()%200 ,50+rand()%200);
 327 #endif
 328
 329     if ((x >= WIDTH) | (y >= HEIGHT) | (x+w <= 0) | (y+h <= 0) | (!w) | (!h)) {
 330         inside = 0;
 331         return;
 332     }
 333
 334     if (rect_update_cache_current == RECT_UPDATE_CACHE) {
 335         fprintf(stderr, "Overflow\n");
 336         rect_update_cache_current = 0;
 337     }
 338
 339     SDL_Rect* u = &(rect_update_cache[rect_update_cache_current]);
 340
 341     if (x < 0/* && x+w > 0*/) {
 342         w += x;
 343         x = 0;
 344     }
 345     if (y < 0/* && y+h > 0*/) {
 346         h += y;
 347         y = 0;
 348     }
 349
 350     if (x+w >= WIDTH) {
 351         w -= (x+w-WIDTH+1);
 352     }
 353
 354     if (y+h >= HEIGHT) {
 355         h -= (y+h-HEIGHT+1);
 356     }
 357
 358     if (w==0 || h==0) {
 359         inside = 0;
 360         return;
 361     }
 362
 363     u->x = x;
 364     u->y = y;
 365     u->w = w;
 366     u->h = h;
 367
 368     rect_update_cache_current++;
 369
 370     inside = 0;
 371 }
 372
 373 void updatescr()
 374 {
 375     int ticks = SDL_GetTicks();
 376     SDL_Rect *r_current = NULL, *end_current = NULL;
 377     SDL_Rect *r_old = NULL;
 378
 379     static int fading_last_time = 0;
 380     int fading_now = ticks < fading_start+FADE_DURATION;
 381
 382     if (fading_now) {
 383         SDL_SetAlpha(buffer, SDL_SRCALPHA | SDL_RLEACCEL, 255-255*(ticks-fading_start)/FADE_DURATION);
 384         SDL_BlitSurface(buffer, NULL, screen, NULL);
 385         SDL_UpdateRect(screen, 0, 0, 0, 0);
 386     } else if (fading_last_time && !fading_now) {
 387         SDL_UpdateRect(screen, 0, 0, 0, 0);
 388     } else {
 389         if (rect_update_old_count == rect_update_cache_current) {
 390             /* Merge rects into one single rect list */
 391             r_old = rect_update_old;
 392             r_current = rect_update_cache;
 393             end_current = rect_update_cache + rect_update_cache_current;
 394             while (r_current != end_current) {
 395                 r_old->w = MAX(r_current->x+r_current->w, r_old->x+r_old->w);
 396                 r_old->h = MAX(r_current->y+r_current->h, r_old->y+r_old->h);
 397                 r_old->x = MIN(r_current->x, r_old->x);
 398                 r_old->y = MIN(r_current->y, r_old->y);
 399                 r_old->w -= r_old->x;
 400                 r_old->h -= r_old->y;
 401
 402                 r_current++;
 403                 r_old++;
 404             }
 405             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 406         } else {
 407             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 408             SDL_UpdateRects(screen, rect_update_cache_current, rect_update_cache);
 409         }
 410     }
 411
 412     reset_screen();
 413     fading_last_time = fading_now;
 414 }
 415
 416 void start_fade() {
 417     SDL_BlitSurface( screen, NULL, buffer, NULL);
 418     fading_start = SDL_GetTicks();
 419 }
 420
 421 int font_get_metrics(image_id id, unsigned char ch, int* xp, int* wp) {
 422     /* Caching of x and width values for faster calculation */
 423     static int xcache[0xFF][GRAPHICS_FONT_COUNT],
 424                wcache[0xFF][GRAPHICS_FONT_COUNT];
 425     static unsigned char cacheflag[0xFF][GRAPHICS_FONT_COUNT];
 426
 427     SDL_Surface *bitmap;
 428     int pos, x = -1, w = 0;
 429     int search_pos = 0, search_x = 0;
 430     unsigned char font_index = id-GRAPHICS_FONT_FIRST;
 431     Uint8 red, green, blue;
 432
 433     if(!GRAPHICS_IS_FONT(id)) return 0;
 434
 435     if (cacheflag[ch][font_index]) {
 436         /* saved! */
 437         if (xp != NULL) *xp = xcache[ch][font_index];
 438         if (wp != NULL) *wp = wcache[ch][font_index];
 439         return wcache[ch][font_index];
 440     }
 441
 442     pos = toupper( ch) - ' '; /* ' ' = first character in font bitmap */
 443
 444     bitmap = images[id].data;
 445
 446     SDL_LockSurface( bitmap);
 447     while( search_x < bitmap->w) {
 448         GET_PIXEL_RGB( bitmap, search_x, 0, &red, &green, &blue);
 449
 450         /* Increase pos counter if we have a "marker" pixel (255,0,255) */
 451         if( red > 250 && green < 10 && blue > 250) {
 452             search_pos++;
 453             if( search_pos == pos) {
 454                 x = search_x;
 455             } else if( search_pos == pos + 1) {
 456                 w = search_x - x;
 457                 break;
 458             }
 459         }
 460
 461         search_x++;
 462     }
 463     SDL_UnlockSurface( bitmap);
 464
 465     if( wp != NULL) (*wp) = w;
 466     if( xp != NULL) (*xp) = x;
 467
 468     cacheflag[ch][font_index]++;
 469     xcache[ch][font_index] = x;
 470     wcache[ch][font_index] = w;
 471
 472     return w;
 473 }
 474
 475 int font_draw_char( image_id id, char ch, int x_offset, int y_offset) {
 476     SDL_Surface *bitmap;
 477     SDL_Rect src, dst;
 478     int x = -1, w = 0;
 479
 480     font_get_metrics( id, ch, &x, &w);
 481     if( x == -1) return w;
 482
 483     bitmap = images[id].data;
 484
 485     dst.w = src.w = w;
 486     dst.h = src.h = bitmap->h - 1;
 487     src.x = x;
 488     src.y = 1;
 489     dst.x = x_offset;
 490     dst.y = y_offset;
 491
 492     SDL_BlitSurface( bitmap, &src, screen, &dst);
 493
 494     return src.w;
 495 }
 496
 497 void font_draw_string_alpha( image_id id, const char* s, int x_offset, int y_offset, int start, int animation, int opacity) {
 498     int y = y_offset;
 499     int x = x_offset;
 500     int i, additional_x = 0, additional_y = 0;
 501     float xw = 0.0, xw_diff;
 502     SDL_Surface *bitmap;
 503
 504     if( id > GR_COUNT) return;
 505
 506     bitmap = images[id].data;
 507     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 508
 509     if( animation & ANIMATION_BUNGEE) {
 510         xw = (25.0*sinf( start/10.0));
 511         xw_diff = 0.0;
 512         x -= xw / 2;
 513     }
 514
 515     if( animation & ANIMATION_PENDULUM) {
 516         x -= (int)(20.0*sinf( start/20.0));
 517         additional_x += 21;
 518     }
 519
 520     for( i=0; i<strlen(s); i++) {
 521         if( animation & ANIMATION_WAVE) {
 522             y = y_offset + (int)(3.0*sinf( start/10.0 + x/30.0));
 523         }
 524         x += font_draw_char( id, s[i], x, y);
 525         if( animation & ANIMATION_BUNGEE) {
 526             xw_diff += xw/strlen(s);
 527             if( xw_diff > 1.0 || xw_diff < -1.0) {
 528                 x += (int)(xw_diff);
 529                 if( xw_diff > 1.0) {
 530                     xw_diff -= 1.0;
 531                 } else {
 532                     xw_diff += 1.0;
 533                 }
 534             }
 535         }
 536     }
 537     if (animation & ANIMATION_WAVE) {
 538         additional_y += 4;
 539     }
 540     if (animation & ANIMATION_BUNGEE) {
 541         additional_x += 26;
 542     }
 543     update_rect(x_offset-additional_x, y_offset-additional_y, x-x_offset+additional_x*2, get_image_height(id)+additional_y*2);
 544 }
 545
 546 int font_get_string_width( image_id id, const char* s) {
 547     int w = 0, i;
 548
 549     for( i=0; i<strlen(s); i++) {
 550         w += font_get_metrics( id, s[i], NULL, NULL);
 551     }
 552
 553     return w;
 554 }
 555
 556 void draw_line_faded( int x1, int y1, int x2, int y2, int r, int g, int b, int r2, int g2, int b2) {
 557     float step, dx, dy, x = x1, y = y1;
 558     int i;
 559     char fade = (r!=r2 || g!=g2 || b!=b2);
 560
 561     step = (float)(abs(x2-x1)>abs(y2-y1)?abs(x2-x1):abs(y2-y1));
 562     dx = (float)(x2-x1) / step;
 563     dy = (float)(y2-y1) / step;
 564
 565     SDL_LockSurface( screen);
 566     for( i=0; i<step; i++) {
 567         x += dx;
 568         y += dy;
 569         if( x < 0.0 || x >= WIDTH || y < 0.0 || y >= HEIGHT) {
 570             continue;
 571         }
 572         if( fade) {
 573             SET_PIXEL_RGB( screen, (int)x, (int)y, (r*(step-i)+r2*i)/step, (g*(step-i)+g2*i)/step, (b*(step-i)+b2*i)/step);
 574         } else {
 575             SET_PIXEL_RGB( screen, (int)x, (int)y, r, g, b);
 576         }
 577     }
 578     SDL_UnlockSurface( screen);
 579 }
 580