4 // Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
6 // This program is free software; you can redistribute it and/or
7 // modify it under the terms of the GNU General Public License
8 // as published by the Free Software Foundation; either version 2
9 // of the License, or (at your option) any later version.
11 // This program is distributed in the hope that it will be useful,
12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 // GNU General Public License for more details.
16 // You should have received a copy of the GNU General Public License
17 // along with this program; if not, write to the Free Software
18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
24 #include "../app/globals.h"
25 #include "../video/screen.h"
26 #include "../video/font.h"
27 #include "../video/drawing_context.h"
28 #include "../utils/lispreader.h"
30 using namespace SuperTux;
32 Font::Font(const std::string& file, FontType ntype, int nw, int nh,
34 : chars(0), shadow_chars(0), type(ntype), w(nw), h(nh),
35 shadowsize(nshadowsize)
37 chars = new Surface(file, true);
47 last_char = first_char + (chars->h / h) * 16;
48 if(last_char > 127) // we have left out some control chars at 128-159
53 SDL_Surface* conv = SDL_DisplayFormatAlpha(chars->impl->get_sdl_surface());
54 int pixels = conv->w * conv->h;
55 SDL_LockSurface(conv);
56 for(int i = 0; i < pixels; ++i) {
57 Uint32 *p = (Uint32 *)conv->pixels + i;
58 *p = *p & conv->format->Amask;
60 SDL_UnlockSurface(conv);
61 SDL_SetAlpha(conv, SDL_SRCALPHA, 128);
62 shadow_chars = new Surface(conv, true);
63 SDL_FreeSurface(conv);
74 Font::get_text_width(const std::string& text) const
76 /** Let's calculate the size of the biggest paragraph */
77 std::string::size_type l, hl;
81 l = text.find("\n", l+1);
82 if(l == std::string::npos)
94 Font::get_text_height(const std::string& text) const
96 /** Let's calculate height of the text */
97 std::string::size_type l, hh;
101 l = text.find("\n", l+1);
102 if(l == (int)std::string::npos)
111 Font::get_height() const
117 Font::draw(const std::string& text, const Vector& pos_, int allignment, Uint32 drawing_effect, int alpha)
119 // calculate X positions based on the allignment type
120 Vector pos = Vector(pos_);
121 if(allignment == CENTER_ALLIGN)
122 pos.x -= get_text_width(text) / 2;
123 else if(allignment == RIGHT_ALLIGN)
124 pos.x -= get_text_width(text);
126 /* Cut lines changes into seperate strings, needed to support center/right text
127 allignments with break lines.
128 Feel free to replace this hack with a more elegant solution
131 std::string::size_type l, i, y;
136 l = text.find("\n", i);
137 if(l == std::string::npos)
139 temp[text.copy(temp, text.size() - i, i)] = '\0';
140 draw_text(temp, pos + Vector(0,y), drawing_effect, alpha);
143 temp[text.copy(temp, l - i, i)] = '\0';
144 draw_text(temp, pos + Vector(0,y), drawing_effect, alpha);
152 Font::draw_text(const std::string& text, const Vector& pos, Uint32 drawing_effect, int alpha)
155 draw_chars(shadow_chars, text, pos + Vector(shadowsize, shadowsize),
156 drawing_effect, alpha);
158 draw_chars(chars, text, pos, drawing_effect, alpha);
162 Font::draw_chars(Surface* pchars, const std::string& text, const Vector& pos,
163 Uint32 drawing_effect, int alpha)
165 SurfaceImpl* impl = pchars->impl;
168 for(size_t i = 0; i < text.size(); ++i)
170 int c = (unsigned char) text[i];
171 if(c > 127) // correct for the 32 controlchars at 128-159
173 // a non-printable character?
179 if(c == ' ' || c < first_char || c > last_char) {
184 int index = c - first_char;
185 int source_x = (index % 16) * w;
186 int source_y = (index / 16) * h;
188 impl->draw_part(source_x, source_y, p.x, p.y, w, h, alpha, drawing_effect);
193 /* --- SCROLL TEXT FUNCTION --- */
196 #define SPEED_INC 0.01
198 #define ITEMS_SPACE 4
200 void SuperTux::display_text_file(const std::string& file, float scroll_speed, Font* heading_font, Font* normal_font, Font* small_font, Font* reference_font )
203 std::vector<std::string> names;
205 LispReader* reader = LispReader::load(datadir + "/" + file, "supertux-text");
209 std::cerr << "Error: Could not open text. Ignoring...\n";
213 reader->read_string("text", text, true);
214 std::string background_file;
215 reader->read_string("background", background_file, true);
218 // Split text string lines into a vector
224 l = text.find("\n", i);
226 if(l == std::string::npos)
229 temp[text.copy(temp, text.size() - i, i)] = '\0';
230 names.push_back(temp);
235 temp[text.copy(temp, l-i, i)] = '\0';
236 names.push_back(temp);
241 // load background image
242 Surface* background = new Surface(datadir + "/images/background/" + background_file, false);
246 float speed = scroll_speed / 50;
248 DrawingContext context;
249 SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
251 Uint32 lastticks = SDL_GetTicks();
254 /* in case of input, exit */
256 while(SDL_PollEvent(&event))
260 switch(event.key.keysym.sym)
289 else if(speed < -MAX_VEL)
292 /* draw the credits */
293 context.draw_surface(background, Vector(0,0), 0);
296 for(size_t i = 0; i < names.size(); i++) {
297 if(names[i].size() == 0) {
298 y += normal_font->get_height() + ITEMS_SPACE;
305 case ' ': font = small_font; break;
306 case '\t': font = normal_font; break;
307 case '-': font = heading_font; break;
308 case '*': font = reference_font; break;
309 default: font = reference_font; break;
312 context.draw_text(font,
313 names[i].substr(1, names[i].size()-1),
314 Vector(screen->w/2, screen->h + y - scroll), CENTER_ALLIGN, LAYER_FOREGROUND1);
315 y += font->get_height() + ITEMS_SPACE;
318 context.do_drawing();
320 if(screen->h+y-scroll < 0 && 20+screen->h+y-scroll < 0)
323 Uint32 ticks = SDL_GetTicks();
324 scroll += speed * (ticks - lastticks);
332 SDL_EnableKeyRepeat(0, 0); // disables key repeating