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 #include <ctype.h>
  30 #include <string.h>
  31
  32 #include "tennix.h"
  33 #include "graphics.h"
  34 #include "archive.h"
  35 #include "sound.h"
  36
  37 static Image* images;
  38
  39 static SDL_Surface *buffer;
  40 static SDL_Surface *background;
  41
  42 static SDL_Rect *rect_update_cache;
  43 static SDL_Rect *rect_update_old;
  44 static int rect_update_cache_current;
  45 static int rect_update_old_count;
  46
  47 Uint32 fading_start = 0;
  48
  49 static const char* graphics[] = {
  50     "court.png",
  51     "shadow.png",
  52     "player-racket.png",
  53     "ball.png",
  54     "smallish-font.png",
  55     "dkc2.png",
  56     "referee.png",
  57     "ctt_hard.png",
  58     "ctt_clay.png",
  59     "ctt_grass.png",
  60     "sidebar.png",
  61     "tennixlogo.png",
  62     "btnplay.png",
  63     "btnresume.png",
  64     "btnquit.png",
  65     "stadium.png",
  66     "fog.png",
  67     "fog2.png",
  68     "night.png",
  69     "talk.png",
  70     "cursor.png",
  71     "loc_margaret_court_arena.png",
  72     "loc_stade_roland_garros.png",
  73     "loc_court_no_1.png",
  74     "loc_arthur_ashe_stadium.png"
  75 };
  76
  77 void init_graphics() {
  78     int i;
  79     char *d;
  80     SDL_Surface* data;
  81     SDL_Surface* tmp;
  82     TennixArchive *tnxar;
  83
  84     rect_update_cache = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  85     rect_update_old = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  86     rect_update_cache_current = 0;
  87     rect_update_old_count = 0;
  88
  89     images = (Image*)calloc( GR_COUNT, sizeof( Image));
  90
  91     buffer = 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     background = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT,
  99                      screen->format->BitsPerPixel,
 100                      screen->format->Rmask,
 101                      screen->format->Gmask,
 102                      screen->format->Bmask,
 103                      screen->format->Amask);
 104
 105     if( buffer == NULL) {
 106         fprintf( stderr, "Cannot create buffer surface: %s\n", SDL_GetError());
 107     }
 108
 109     tnxar = tnxar_open(ARCHIVE_FILE);
 110     if (tnxar == NULL) {
 111         /* not found in cwd - try installed... */
 112         tnxar = tnxar_open(ARCHIVE_FILE_INSTALLED);
 113         assert(tnxar != NULL);
 114     }
 115
 116     draw_button(40, (HEIGHT-40)/2, WIDTH-80, 40, 100, 100, 100, 1);
 117     store_screen();
 118     updatescr();
 119
 120     for( i=0; i<GR_COUNT; i++) {
 121         if (tnxar_set_current_filename(tnxar, graphics[i]) != 0) {
 122             d = tnxar_read_current(tnxar);
 123             tmp = IMG_Load_RW(SDL_RWFromMem(d, tnxar_size_current(tnxar)), 0);
 124             free(d);
 125         } else {
 126             fprintf(stderr, "Cannot find file: %s\n", graphics[i]);
 127             exit(EXIT_FAILURE);
 128         }
 129         if( !tmp) {
 130             fprintf( stderr, "Error: %s\n", SDL_GetError());
 131             continue;
 132         }
 133
 134         if( GRAPHICS_IS_FONT(i)) {
 135             /* Convert to RGB w/ colorkey=black for opacity support */
 136             SDL_SetColorKey( tmp, SDL_SRCCOLORKEY | SDL_RLEACCEL, SDL_MapRGB( tmp->format, 0, 0, 0));
 137             data = SDL_ConvertSurface( tmp, screen->format, SDL_SRCCOLORKEY | SDL_RLEACCEL);
 138         } else {
 139             /* Convert to RGBA for alpha channel from PNG */
 140             data = SDL_DisplayFormatAlpha( tmp);
 141         }
 142         SDL_FreeSurface( tmp);
 143
 144         if( !data) {
 145             fprintf( stderr, "Error: %s\n", SDL_GetError());
 146             continue;
 147         }
 148         images[i].data = data;
 149
 150         draw_button(40, (HEIGHT-40)/2, (WIDTH-80)*i/(GR_COUNT+SOUND_MAX), 40, 100, 250, 100, 0);
 151         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);
 152         updatescr();
 153     }
 154     tnxar_close(tnxar);
 155 }
 156
 157 void uninit_graphics() {
 158     int i;
 159
 160     for( i=0; i<GR_COUNT; i++) {
 161         SDL_FreeSurface( images[i].data);
 162     }
 163
 164     if( buffer != NULL) {
 165         SDL_FreeSurface( buffer);
 166     }
 167
 168     if (background != NULL) {
 169         SDL_FreeSurface(background);
 170     }
 171
 172     free(rect_update_cache);
 173     free(rect_update_old);
 174     free(images);
 175 }
 176
 177 int get_image_width( image_id id) {
 178     return images[id].data->w;
 179 }
 180
 181 int get_image_height( image_id id) {
 182     return images[id].data->h;
 183 }
 184
 185 int get_sprite_width( image_id id, int items) {
 186     return images[id].data->w / items;
 187 }
 188
 189 void show_sprite( image_id id, int pos, int items, int x_offset, int y_offset, int opacity) {
 190     SDL_Surface *bitmap;
 191     SDL_Rect src, dst;
 192
 193     bitmap = images[id].data;
 194
 195     if( !bitmap) return;
 196
 197     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 198
 199     dst.w = src.w = bitmap->w/items;
 200     dst.h = src.h = bitmap->h;
 201     src.x = src.w*pos;
 202     src.y = 0;
 203     dst.x = x_offset;
 204     dst.y = y_offset;
 205
 206     SDL_BlitSurface( bitmap, &src, screen, &dst);
 207     update_rect2(dst);
 208 }
 209
 210 void fill_image_offset( image_id id, int x, int y, int w, int h, int offset_x, int offset_y) {
 211     SDL_Surface *bitmap;
 212     SDL_Rect src, dst;
 213     int dx = 0, dy = 0, cx, cy;
 214
 215     if( id >= GR_COUNT) return;
 216
 217     bitmap = images[id].data;
 218
 219     /* Make negative offsets positive */
 220     if (offset_x < 0) {
 221         offset_x = (offset_x%bitmap->w)+bitmap->w;
 222     }
 223     if (offset_y < 0) {
 224         offset_y = (offset_y%bitmap->h)+bitmap->h;
 225     }
 226
 227     src.y = offset_y % bitmap->h;
 228     while( dy < h) {
 229         src.h = dst.h = cy = (h-dy > bitmap->h-src.y)?(bitmap->h-src.y):(h-dy);
 230         dst.y = y+dy;
 231
 232         dx = 0;
 233         src.x = offset_x % bitmap->w;
 234         while( dx < w) {
 235             src.w = dst.w = cx = (w-dx > bitmap->w-src.x)?(bitmap->w-src.x):(w-dx);
 236             dst.x = x+dx;
 237
 238             SDL_BlitSurface( bitmap, &src, screen, &dst);
 239             update_rect2(dst);
 240
 241             dx += cx;
 242             src.x = 0;
 243         }
 244
 245         dy += cy;
 246         src.y = 0;
 247     }
 248 }
 249
 250 void line_horiz( int y, Uint8 r, Uint8 g, Uint8 b) {
 251     rectangle(0, y, screen->w, 1, r, g, b);
 252 }
 253
 254 void line_vert( int x, Uint8 r, Uint8 g, Uint8 b) {
 255     rectangle(x, 0, 1, screen->h, r, g, b);
 256 }
 257
 258 void rectangle( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b) {
 259     Uint32 color = SDL_MapRGB( screen->format, r, g, b);
 260     SDL_Rect rect;
 261
 262     rect.x = x;
 263     rect.y = y;
 264     rect.w = w;
 265     rect.h = h;
 266
 267     SDL_FillRect( screen, &rect, color);
 268     update_rect(x, y, w, h);
 269 }
 270
 271 void draw_button( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 272     float diff = (pressed?1.0-BUTTON_HIGHLIGHT:1.0+BUTTON_HIGHLIGHT);
 273     rectangle(x, y, w, h, MIN(r*diff, 255), MIN(g*diff, 255), MIN(b*diff, 255));
 274     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));
 275     rectangle(x+BUTTON_BORDER, y+BUTTON_BORDER, w-2*BUTTON_BORDER, h-2*BUTTON_BORDER, r, g, b);
 276 }
 277
 278 void draw_button_text(const char* s, int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 279     int font_x, font_y;
 280     pressed = pressed?1:0;
 281     draw_button( x, y, w, h, r, g, b, pressed);
 282     font_x = x + w/2 - font_get_string_width( GR_SMALLISH_FONT, s)/2 + pressed*BUTTON_BORDER;
 283     font_y = y + h/2 - get_image_height( GR_SMALLISH_FONT)/2 + pressed*BUTTON_BORDER;
 284     font_draw_string( GR_SMALLISH_FONT, s, font_x, font_y, 0, 0);
 285 }
 286
 287 void clear_screen()
 288 {
 289     SDL_Rect rect;
 290
 291     rect.x = rect.y = 0;
 292     rect.w = WIDTH;
 293     rect.h = HEIGHT;
 294
 295     SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 296 }
 297
 298 void store_screen()
 299 {
 300     SDL_BlitSurface(screen, NULL, background, NULL);
 301     rect_update_old[0].x = rect_update_old[0].y = 0;
 302     rect_update_old[0].w = WIDTH;
 303     rect_update_old[0].h = HEIGHT;
 304     rect_update_old_count = 1;
 305     rect_update_cache_current = 0;
 306 }
 307
 308 void reset_screen()
 309 {
 310     int i;
 311     SDL_Rect* tmp;
 312     SDL_BlitSurface(background, NULL, screen, NULL);
 313
 314     for (i=0; i<rect_update_cache_current; i++) {
 315         SDL_BlitSurface(background, &rect_update_cache[i], screen, &rect_update_cache[i]);
 316     }
 317
 318     /* Save rects I've just updated for redraw later */
 319     tmp = rect_update_cache;
 320     rect_update_cache = rect_update_old;
 321     rect_update_old = tmp;
 322     rect_update_old_count = rect_update_cache_current;
 323     rect_update_cache_current = 0;
 324 }
 325
 326 void update_rect(Sint32 x, Sint32 y, Sint32 w, Sint32 h)
 327 {
 328     SDL_Rect* u = NULL;
 329     static int inside = 0;
 330     if (inside) return;
 331     inside = 1;
 332
 333 #ifdef DRAW_UPDATE_RECTANGLE
 334     rectangle(x, y, w, h, 50+rand()%200, 50+rand()%200 ,50+rand()%200);
 335 #endif
 336
 337     if ((x >= WIDTH) | (y >= HEIGHT) | (x+w <= 0) | (y+h <= 0) | (!w) | (!h)) {
 338         inside = 0;
 339         return;
 340     }
 341
 342     if (rect_update_cache_current == RECT_UPDATE_CACHE) {
 343         fprintf(stderr, "Overflow\n");
 344         rect_update_cache_current = 0;
 345     }
 346
 347     u = &(rect_update_cache[rect_update_cache_current]);
 348
 349     if (x < 0/* && x+w > 0*/) {
 350         w += x;
 351         x = 0;
 352     }
 353     if (y < 0/* && y+h > 0*/) {
 354         h += y;
 355         y = 0;
 356     }
 357
 358     if (x+w >= WIDTH) {
 359         w -= (x+w-WIDTH+1);
 360     }
 361
 362     if (y+h >= HEIGHT) {
 363         h -= (y+h-HEIGHT+1);
 364     }
 365
 366     if (w==0 || h==0) {
 367         inside = 0;
 368         return;
 369     }
 370
 371     u->x = x;
 372     u->y = y;
 373     u->w = w;
 374     u->h = h;
 375
 376     rect_update_cache_current++;
 377
 378     inside = 0;
 379 }
 380
 381 void updatescr()
 382 {
 383     Uint32 ticks = SDL_GetTicks();
 384     SDL_Rect *r_current = NULL, *end_current = NULL;
 385     SDL_Rect *r_old = NULL;
 386
 387     static int fading_last_time = 0;
 388     unsigned char fading_now = ticks < fading_start+FADE_DURATION;
 389
 390     if (fading_now) {
 391         SDL_SetAlpha(buffer, SDL_SRCALPHA | SDL_RLEACCEL, 255-255*(ticks-fading_start)/FADE_DURATION);
 392         SDL_BlitSurface(buffer, NULL, screen, NULL);
 393         SDL_UpdateRect(screen, 0, 0, 0, 0);
 394     } else if (fading_last_time && !fading_now) {
 395         SDL_UpdateRect(screen, 0, 0, 0, 0);
 396     } else {
 397         if (rect_update_old_count == rect_update_cache_current) {
 398             /* Merge rects into one single rect list */
 399             r_old = rect_update_old;
 400             r_current = rect_update_cache;
 401             end_current = rect_update_cache + rect_update_cache_current;
 402             while (r_current != end_current) {
 403                 r_old->w = MAX(r_current->x+r_current->w, r_old->x+r_old->w);
 404                 r_old->h = MAX(r_current->y+r_current->h, r_old->y+r_old->h);
 405                 r_old->x = MIN(r_current->x, r_old->x);
 406                 r_old->y = MIN(r_current->y, r_old->y);
 407                 r_old->w -= r_old->x;
 408                 r_old->h -= r_old->y;
 409
 410                 r_current++;
 411                 r_old++;
 412             }
 413             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 414         } else {
 415             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 416             SDL_UpdateRects(screen, rect_update_cache_current, rect_update_cache);
 417         }
 418     }
 419
 420     reset_screen();
 421     fading_last_time = fading_now;
 422 }
 423
 424 void start_fade() {
 425     SDL_BlitSurface( screen, NULL, buffer, NULL);
 426     fading_start = SDL_GetTicks();
 427 }
 428
 429 int font_get_metrics(image_id id, unsigned char ch, int* xp, int* wp) {
 430     /* Caching of x and width values for faster calculation */
 431     static int xcache[0xFF][GRAPHICS_FONT_COUNT],
 432                wcache[0xFF][GRAPHICS_FONT_COUNT];
 433     static unsigned char cacheflag[0xFF][GRAPHICS_FONT_COUNT];
 434
 435     SDL_Surface *bitmap;
 436     int pos, x = -1, w = 0;
 437     int search_pos = 0, search_x = 0;
 438     unsigned char font_index = id-GRAPHICS_FONT_FIRST;
 439     Uint8 red, green, blue;
 440
 441     if(!GRAPHICS_IS_FONT(id)) return 0;
 442
 443     if (cacheflag[ch][font_index]) {
 444         /* saved! */
 445         if (xp != NULL) *xp = xcache[ch][font_index];
 446         if (wp != NULL) *wp = wcache[ch][font_index];
 447         return wcache[ch][font_index];
 448     }
 449
 450     pos = toupper( ch) - ' '; /* ' ' = first character in font bitmap */
 451
 452     bitmap = images[id].data;
 453
 454     SDL_LockSurface( bitmap);
 455     while( search_x < bitmap->w) {
 456         GET_PIXEL_RGB( bitmap, search_x, 0, &red, &green, &blue);
 457
 458         /* Increase pos counter if we have a "marker" pixel (255,0,255) */
 459         if( red > 250 && green < 10 && blue > 250) {
 460             search_pos++;
 461             if( search_pos == pos) {
 462                 x = search_x;
 463             } else if( search_pos == pos + 1) {
 464                 w = search_x - x;
 465                 break;
 466             }
 467         }
 468
 469         search_x++;
 470     }
 471     SDL_UnlockSurface( bitmap);
 472
 473     if( wp != NULL) (*wp) = w;
 474     if( xp != NULL) (*xp) = x;
 475
 476     cacheflag[ch][font_index]++;
 477     xcache[ch][font_index] = x;
 478     wcache[ch][font_index] = w;
 479
 480     return w;
 481 }
 482
 483 int font_draw_char( image_id id, char ch, int x_offset, int y_offset) {
 484     SDL_Surface *bitmap;
 485     SDL_Rect src, dst;
 486     int x = -1, w = 0;
 487
 488     font_get_metrics( id, ch, &x, &w);
 489     if( x == -1) return w;
 490
 491     bitmap = images[id].data;
 492
 493     dst.w = src.w = w;
 494     dst.h = src.h = bitmap->h - 1;
 495     src.x = x;
 496     src.y = 1;
 497     dst.x = x_offset;
 498     dst.y = y_offset;
 499
 500     SDL_BlitSurface( bitmap, &src, screen, &dst);
 501
 502     return src.w;
 503 }
 504
 505 void font_draw_string_alpha( image_id id, const char* s, int x_offset, int y_offset, int start, int animation, int opacity) {
 506     int y = y_offset;
 507     int x = x_offset;
 508     int additional_x = 0, additional_y = 0;
 509     float xw = 0.0, xw_diff = 0.0;
 510     unsigned int i;
 511     SDL_Surface *bitmap;
 512
 513     if( id > GR_COUNT) return;
 514
 515     bitmap = images[id].data;
 516     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 517
 518     if( animation & ANIMATION_BUNGEE) {
 519         xw = (25.0*sinf( start/10.0));
 520         x -= xw / 2;
 521     }
 522
 523     if( animation & ANIMATION_PENDULUM) {
 524         x -= (int)(20.0*sinf( start/20.0));
 525         additional_x += 21;
 526     }
 527
 528     for( i=0; i<strlen(s); i++) {
 529         if( animation & ANIMATION_WAVE) {
 530             y = y_offset + (int)(3.0*sinf( start/10.0 + x/30.0));
 531         }
 532         x += font_draw_char( id, s[i], x, y);
 533         if( animation & ANIMATION_BUNGEE) {
 534             xw_diff += xw/strlen(s);
 535             if( xw_diff > 1.0 || xw_diff < -1.0) {
 536                 x += (int)(xw_diff);
 537                 if( xw_diff > 1.0) {
 538                     xw_diff -= 1.0;
 539                 } else {
 540                     xw_diff += 1.0;
 541                 }
 542             }
 543         }
 544     }
 545     if (animation & ANIMATION_WAVE) {
 546         additional_y += 4;
 547     }
 548     if (animation & ANIMATION_BUNGEE) {
 549         additional_x += 26;
 550     }
 551     update_rect(x_offset-additional_x, y_offset-additional_y, x-x_offset+additional_x*2, get_image_height(id)+additional_y*2);
 552 }
 553
 554 int font_get_string_width( image_id id, const char* s) {
 555     int w = 0;
 556     unsigned int i;
 557
 558     for( i=0; i<strlen(s); i++) {
 559         w += font_get_metrics( id, s[i], NULL, NULL);
 560     }
 561
 562     return w;
 563 }
 564
 565 void draw_line_faded( int x1, int y1, int x2, int y2, int r, int g, int b, int r2, int g2, int b2) {
 566     float step, dx, dy, x = x1, y = y1;
 567     int i;
 568     char fade = (r!=r2 || g!=g2 || b!=b2);
 569
 570     step = (float)(abs(x2-x1)>abs(y2-y1)?abs(x2-x1):abs(y2-y1));
 571     dx = (float)(x2-x1) / step;
 572     dy = (float)(y2-y1) / step;
 573
 574     SDL_LockSurface( screen);
 575     for( i=0; i<step; i++) {
 576         x += dx;
 577         y += dy;
 578         if( x < 0.0 || x >= WIDTH || y < 0.0 || y >= HEIGHT) {
 579             continue;
 580         }
 581         if( fade) {
 582             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);
 583         } else {
 584             SET_PIXEL_RGB( screen, (int)x, (int)y, r, g, b);
 585         }
 586     }
 587     SDL_UnlockSurface( screen);
 588 }
 589