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 };
  72
  73 void init_graphics() {
  74     int i;
  75     char *d;
  76     SDL_Surface* data;
  77     SDL_Surface* tmp;
  78     TennixArchive *tnxar;
  79
  80     rect_update_cache = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  81     rect_update_old = (SDL_Rect*)calloc(RECT_UPDATE_CACHE, sizeof(SDL_Rect));
  82     rect_update_cache_current = 0;
  83     rect_update_old_count = 0;
  84
  85     images = (Image*)calloc( GR_COUNT, sizeof( Image));
  86
  87     buffer = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT,
  88                  screen->format->BitsPerPixel,
  89                  screen->format->Rmask,
  90                  screen->format->Gmask,
  91                  screen->format->Bmask,
  92                  screen->format->Amask);
  93
  94     background = SDL_CreateRGBSurface(SDL_SWSURFACE, WIDTH, HEIGHT,
  95                      screen->format->BitsPerPixel,
  96                      screen->format->Rmask,
  97                      screen->format->Gmask,
  98                      screen->format->Bmask,
  99                      screen->format->Amask);
 100
 101     if( buffer == NULL) {
 102         fprintf( stderr, "Cannot create buffer surface: %s\n", SDL_GetError());
 103     }
 104
 105     tnxar = tnxar_open(ARCHIVE_FILE);
 106     if (tnxar == NULL) {
 107         /* not found in cwd - try installed... */
 108         tnxar = tnxar_open(ARCHIVE_FILE_INSTALLED);
 109         assert(tnxar != NULL);
 110     }
 111
 112     draw_button(40, (HEIGHT-40)/2, WIDTH-80, 40, 100, 100, 100, 1);
 113     store_screen();
 114     updatescr();
 115
 116     for( i=0; i<GR_COUNT; i++) {
 117         if (tnxar_set_current_filename(tnxar, graphics[i]) != 0) {
 118             d = tnxar_read_current(tnxar);
 119             tmp = IMG_Load_RW(SDL_RWFromMem(d, tnxar_size_current(tnxar)), 0);
 120             free(d);
 121         } else {
 122             fprintf(stderr, "Cannot find file: %s\n", graphics[i]);
 123             exit(EXIT_FAILURE);
 124         }
 125         if( !tmp) {
 126             fprintf( stderr, "Error: %s\n", SDL_GetError());
 127             continue;
 128         }
 129
 130         if( GRAPHICS_IS_FONT(i)) {
 131             /* Convert to RGB w/ colorkey=black for opacity support */
 132             SDL_SetColorKey( tmp, SDL_SRCCOLORKEY | SDL_RLEACCEL, SDL_MapRGB( tmp->format, 0, 0, 0));
 133             data = SDL_ConvertSurface( tmp, screen->format, SDL_SRCCOLORKEY | SDL_RLEACCEL);
 134         } else {
 135             /* Convert to RGBA for alpha channel from PNG */
 136             data = SDL_DisplayFormatAlpha( tmp);
 137         }
 138         SDL_FreeSurface( tmp);
 139
 140         if( !data) {
 141             fprintf( stderr, "Error: %s\n", SDL_GetError());
 142             continue;
 143         }
 144         images[i].data = data;
 145
 146         draw_button(40, (HEIGHT-40)/2, (WIDTH-80)*i/(GR_COUNT+SOUND_MAX), 40, 100, 250, 100, 0);
 147         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);
 148         updatescr();
 149     }
 150     tnxar_close(tnxar);
 151 }
 152
 153 void uninit_graphics() {
 154     int i;
 155
 156     for( i=0; i<GR_COUNT; i++) {
 157         SDL_FreeSurface( images[i].data);
 158     }
 159
 160     if( buffer != NULL) {
 161         SDL_FreeSurface( buffer);
 162     }
 163
 164     if (background != NULL) {
 165         SDL_FreeSurface(background);
 166     }
 167
 168     free(rect_update_cache);
 169     free(rect_update_old);
 170     free(images);
 171 }
 172
 173 int get_image_width( image_id id) {
 174     return images[id].data->w;
 175 }
 176
 177 int get_image_height( image_id id) {
 178     return images[id].data->h;
 179 }
 180
 181 int get_sprite_width( image_id id, int items) {
 182     return images[id].data->w / items;
 183 }
 184
 185 void show_sprite( image_id id, int pos, int items, int x_offset, int y_offset, int opacity) {
 186     SDL_Surface *bitmap;
 187     SDL_Rect src, dst;
 188
 189     bitmap = images[id].data;
 190
 191     if( !bitmap) return;
 192
 193     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 194
 195     dst.w = src.w = bitmap->w/items;
 196     dst.h = src.h = bitmap->h;
 197     src.x = src.w*pos;
 198     src.y = 0;
 199     dst.x = x_offset;
 200     dst.y = y_offset;
 201
 202     SDL_BlitSurface( bitmap, &src, screen, &dst);
 203     update_rect2(dst);
 204 }
 205
 206 void fill_image_offset( image_id id, int x, int y, int w, int h, int offset_x, int offset_y) {
 207     SDL_Surface *bitmap;
 208     SDL_Rect src, dst;
 209     int dx = 0, dy = 0, cx, cy;
 210
 211     if( id >= GR_COUNT) return;
 212
 213     bitmap = images[id].data;
 214
 215     /* Make negative offsets positive */
 216     if (offset_x < 0) {
 217         offset_x = (offset_x%bitmap->w)+bitmap->w;
 218     }
 219     if (offset_y < 0) {
 220         offset_y = (offset_y%bitmap->h)+bitmap->h;
 221     }
 222
 223     src.y = offset_y % bitmap->h;
 224     while( dy < h) {
 225         src.h = dst.h = cy = (h-dy > bitmap->h-src.y)?(bitmap->h-src.y):(h-dy);
 226         dst.y = y+dy;
 227
 228         dx = 0;
 229         src.x = offset_x % bitmap->w;
 230         while( dx < w) {
 231             src.w = dst.w = cx = (w-dx > bitmap->w-src.x)?(bitmap->w-src.x):(w-dx);
 232             dst.x = x+dx;
 233
 234             SDL_BlitSurface( bitmap, &src, screen, &dst);
 235             update_rect2(dst);
 236
 237             dx += cx;
 238             src.x = 0;
 239         }
 240
 241         dy += cy;
 242         src.y = 0;
 243     }
 244 }
 245
 246 void line_horiz( int y, Uint8 r, Uint8 g, Uint8 b) {
 247     rectangle(0, y, screen->w, 1, r, g, b);
 248 }
 249
 250 void line_vert( int x, Uint8 r, Uint8 g, Uint8 b) {
 251     rectangle(x, 0, 1, screen->h, r, g, b);
 252 }
 253
 254 void rectangle( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b) {
 255     Uint32 color = SDL_MapRGB( screen->format, r, g, b);
 256     SDL_Rect rect;
 257
 258     rect.x = x;
 259     rect.y = y;
 260     rect.w = w;
 261     rect.h = h;
 262
 263     SDL_FillRect( screen, &rect, color);
 264     update_rect(x, y, w, h);
 265 }
 266
 267 void draw_button( int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 268     float diff = (pressed?1.0-BUTTON_HIGHLIGHT:1.0+BUTTON_HIGHLIGHT);
 269     rectangle(x, y, w, h, MIN(r*diff, 255), MIN(g*diff, 255), MIN(b*diff, 255));
 270     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));
 271     rectangle(x+BUTTON_BORDER, y+BUTTON_BORDER, w-2*BUTTON_BORDER, h-2*BUTTON_BORDER, r, g, b);
 272 }
 273
 274 void draw_button_text(const char* s, int x, int y, int w, int h, Uint8 r, Uint8 g, Uint8 b, char pressed) {
 275     int font_x, font_y;
 276     pressed = pressed?1:0;
 277     draw_button( x, y, w, h, r, g, b, pressed);
 278     font_x = x + w/2 - font_get_string_width( GR_SMALLISH_FONT, s)/2 + pressed*BUTTON_BORDER;
 279     font_y = y + h/2 - get_image_height( GR_SMALLISH_FONT)/2 + pressed*BUTTON_BORDER;
 280     font_draw_string( GR_SMALLISH_FONT, s, font_x, font_y, 0, 0);
 281 }
 282
 283 void clear_screen()
 284 {
 285     SDL_Rect rect;
 286
 287     rect.x = rect.y = 0;
 288     rect.w = WIDTH;
 289     rect.h = HEIGHT;
 290
 291     SDL_FillRect(screen, &rect, SDL_MapRGB(screen->format, 0, 0, 0));
 292 }
 293
 294 void store_screen()
 295 {
 296     SDL_BlitSurface(screen, NULL, background, NULL);
 297     rect_update_old[0].x = rect_update_old[0].y = 0;
 298     rect_update_old[0].w = WIDTH;
 299     rect_update_old[0].h = HEIGHT;
 300     rect_update_old_count = 1;
 301     rect_update_cache_current = 0;
 302 }
 303
 304 void reset_screen()
 305 {
 306     int i;
 307     SDL_Rect* tmp;
 308     SDL_BlitSurface(background, NULL, screen, NULL);
 309
 310     for (i=0; i<rect_update_cache_current; i++) {
 311         SDL_BlitSurface(background, &rect_update_cache[i], screen, &rect_update_cache[i]);
 312     }
 313
 314     /* Save rects I've just updated for redraw later */
 315     tmp = rect_update_cache;
 316     rect_update_cache = rect_update_old;
 317     rect_update_old = tmp;
 318     rect_update_old_count = rect_update_cache_current;
 319     rect_update_cache_current = 0;
 320 }
 321
 322 void update_rect(Sint32 x, Sint32 y, Sint32 w, Sint32 h)
 323 {
 324     SDL_Rect* u = NULL;
 325     static int inside = 0;
 326     if (inside) return;
 327     inside = 1;
 328
 329 #ifdef DRAW_UPDATE_RECTANGLE
 330     rectangle(x, y, w, h, 50+rand()%200, 50+rand()%200 ,50+rand()%200);
 331 #endif
 332
 333     if ((x >= WIDTH) | (y >= HEIGHT) | (x+w <= 0) | (y+h <= 0) | (!w) | (!h)) {
 334         inside = 0;
 335         return;
 336     }
 337
 338     if (rect_update_cache_current == RECT_UPDATE_CACHE) {
 339         fprintf(stderr, "Overflow\n");
 340         rect_update_cache_current = 0;
 341     }
 342
 343     u = &(rect_update_cache[rect_update_cache_current]);
 344
 345     if (x < 0/* && x+w > 0*/) {
 346         w += x;
 347         x = 0;
 348     }
 349     if (y < 0/* && y+h > 0*/) {
 350         h += y;
 351         y = 0;
 352     }
 353
 354     if (x+w >= WIDTH) {
 355         w -= (x+w-WIDTH+1);
 356     }
 357
 358     if (y+h >= HEIGHT) {
 359         h -= (y+h-HEIGHT+1);
 360     }
 361
 362     if (w==0 || h==0) {
 363         inside = 0;
 364         return;
 365     }
 366
 367     u->x = x;
 368     u->y = y;
 369     u->w = w;
 370     u->h = h;
 371
 372     rect_update_cache_current++;
 373
 374     inside = 0;
 375 }
 376
 377 void updatescr()
 378 {
 379     Uint32 ticks = SDL_GetTicks();
 380     SDL_Rect *r_current = NULL, *end_current = NULL;
 381     SDL_Rect *r_old = NULL;
 382
 383     static int fading_last_time = 0;
 384     unsigned char fading_now = ticks < fading_start+FADE_DURATION;
 385
 386     if (fading_now) {
 387         SDL_SetAlpha(buffer, SDL_SRCALPHA | SDL_RLEACCEL, 255-255*(ticks-fading_start)/FADE_DURATION);
 388         SDL_BlitSurface(buffer, NULL, screen, NULL);
 389         SDL_UpdateRect(screen, 0, 0, 0, 0);
 390     } else if (fading_last_time && !fading_now) {
 391         SDL_UpdateRect(screen, 0, 0, 0, 0);
 392     } else {
 393         if (rect_update_old_count == rect_update_cache_current) {
 394             /* Merge rects into one single rect list */
 395             r_old = rect_update_old;
 396             r_current = rect_update_cache;
 397             end_current = rect_update_cache + rect_update_cache_current;
 398             while (r_current != end_current) {
 399                 r_old->w = MAX(r_current->x+r_current->w, r_old->x+r_old->w);
 400                 r_old->h = MAX(r_current->y+r_current->h, r_old->y+r_old->h);
 401                 r_old->x = MIN(r_current->x, r_old->x);
 402                 r_old->y = MIN(r_current->y, r_old->y);
 403                 r_old->w -= r_old->x;
 404                 r_old->h -= r_old->y;
 405
 406                 r_current++;
 407                 r_old++;
 408             }
 409             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 410         } else {
 411             SDL_UpdateRects(screen, rect_update_old_count, rect_update_old);
 412             SDL_UpdateRects(screen, rect_update_cache_current, rect_update_cache);
 413         }
 414     }
 415
 416     reset_screen();
 417     fading_last_time = fading_now;
 418 }
 419
 420 void start_fade() {
 421     SDL_BlitSurface( screen, NULL, buffer, NULL);
 422     fading_start = SDL_GetTicks();
 423 }
 424
 425 int font_get_metrics(image_id id, unsigned char ch, int* xp, int* wp) {
 426     /* Caching of x and width values for faster calculation */
 427     static int xcache[0xFF][GRAPHICS_FONT_COUNT],
 428                wcache[0xFF][GRAPHICS_FONT_COUNT];
 429     static unsigned char cacheflag[0xFF][GRAPHICS_FONT_COUNT];
 430
 431     SDL_Surface *bitmap;
 432     int pos, x = -1, w = 0;
 433     int search_pos = 0, search_x = 0;
 434     unsigned char font_index = id-GRAPHICS_FONT_FIRST;
 435     Uint8 red, green, blue;
 436
 437     if(!GRAPHICS_IS_FONT(id)) return 0;
 438
 439     if (cacheflag[ch][font_index]) {
 440         /* saved! */
 441         if (xp != NULL) *xp = xcache[ch][font_index];
 442         if (wp != NULL) *wp = wcache[ch][font_index];
 443         return wcache[ch][font_index];
 444     }
 445
 446     pos = toupper( ch) - ' '; /* ' ' = first character in font bitmap */
 447
 448     bitmap = images[id].data;
 449
 450     SDL_LockSurface( bitmap);
 451     while( search_x < bitmap->w) {
 452         GET_PIXEL_RGB( bitmap, search_x, 0, &red, &green, &blue);
 453
 454         /* Increase pos counter if we have a "marker" pixel (255,0,255) */
 455         if( red > 250 && green < 10 && blue > 250) {
 456             search_pos++;
 457             if( search_pos == pos) {
 458                 x = search_x;
 459             } else if( search_pos == pos + 1) {
 460                 w = search_x - x;
 461                 break;
 462             }
 463         }
 464
 465         search_x++;
 466     }
 467     SDL_UnlockSurface( bitmap);
 468
 469     if( wp != NULL) (*wp) = w;
 470     if( xp != NULL) (*xp) = x;
 471
 472     cacheflag[ch][font_index]++;
 473     xcache[ch][font_index] = x;
 474     wcache[ch][font_index] = w;
 475
 476     return w;
 477 }
 478
 479 int font_draw_char( image_id id, char ch, int x_offset, int y_offset) {
 480     SDL_Surface *bitmap;
 481     SDL_Rect src, dst;
 482     int x = -1, w = 0;
 483
 484     font_get_metrics( id, ch, &x, &w);
 485     if( x == -1) return w;
 486
 487     bitmap = images[id].data;
 488
 489     dst.w = src.w = w;
 490     dst.h = src.h = bitmap->h - 1;
 491     src.x = x;
 492     src.y = 1;
 493     dst.x = x_offset;
 494     dst.y = y_offset;
 495
 496     SDL_BlitSurface( bitmap, &src, screen, &dst);
 497
 498     return src.w;
 499 }
 500
 501 void font_draw_string_alpha( image_id id, const char* s, int x_offset, int y_offset, int start, int animation, int opacity) {
 502     int y = y_offset;
 503     int x = x_offset;
 504     int additional_x = 0, additional_y = 0;
 505     float xw = 0.0, xw_diff = 0.0;
 506     unsigned int i;
 507     SDL_Surface *bitmap;
 508
 509     if( id > GR_COUNT) return;
 510
 511     bitmap = images[id].data;
 512     SDL_SetAlpha( bitmap, SDL_SRCALPHA | SDL_RLEACCEL, opacity);
 513
 514     if( animation & ANIMATION_BUNGEE) {
 515         xw = (25.0*sinf( start/10.0));
 516         x -= xw / 2;
 517     }
 518
 519     if( animation & ANIMATION_PENDULUM) {
 520         x -= (int)(20.0*sinf( start/20.0));
 521         additional_x += 21;
 522     }
 523
 524     for( i=0; i<strlen(s); i++) {
 525         if( animation & ANIMATION_WAVE) {
 526             y = y_offset + (int)(3.0*sinf( start/10.0 + x/30.0));
 527         }
 528         x += font_draw_char( id, s[i], x, y);
 529         if( animation & ANIMATION_BUNGEE) {
 530             xw_diff += xw/strlen(s);
 531             if( xw_diff > 1.0 || xw_diff < -1.0) {
 532                 x += (int)(xw_diff);
 533                 if( xw_diff > 1.0) {
 534                     xw_diff -= 1.0;
 535                 } else {
 536                     xw_diff += 1.0;
 537                 }
 538             }
 539         }
 540     }
 541     if (animation & ANIMATION_WAVE) {
 542         additional_y += 4;
 543     }
 544     if (animation & ANIMATION_BUNGEE) {
 545         additional_x += 26;
 546     }
 547     update_rect(x_offset-additional_x, y_offset-additional_y, x-x_offset+additional_x*2, get_image_height(id)+additional_y*2);
 548 }
 549
 550 int font_get_string_width( image_id id, const char* s) {
 551     int w = 0;
 552     unsigned int i;
 553
 554     for( i=0; i<strlen(s); i++) {
 555         w += font_get_metrics( id, s[i], NULL, NULL);
 556     }
 557
 558     return w;
 559 }
 560
 561 void draw_line_faded( int x1, int y1, int x2, int y2, int r, int g, int b, int r2, int g2, int b2) {
 562     float step, dx, dy, x = x1, y = y1;
 563     int i;
 564     char fade = (r!=r2 || g!=g2 || b!=b2);
 565
 566     step = (float)(abs(x2-x1)>abs(y2-y1)?abs(x2-x1):abs(y2-y1));
 567     dx = (float)(x2-x1) / step;
 568     dy = (float)(y2-y1) / step;
 569
 570     SDL_LockSurface( screen);
 571     for( i=0; i<step; i++) {
 572         x += dx;
 573         y += dy;
 574         if( x < 0.0 || x >= WIDTH || y < 0.0 || y >= HEIGHT) {
 575             continue;
 576         }
 577         if( fade) {
 578             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);
 579         } else {
 580             SET_PIXEL_RGB( screen, (int)x, (int)y, r, g, b);
 581         }
 582     }
 583     SDL_UnlockSurface( screen);
 584 }
 585