git.sesse.net Git - ccbs/blob - bigscreen/fonts.cpp

   1 #include <cstdio>
   2 #include <vector>
   3 #include <stdexcept>
   4 #include <map>
   5 #include <string>
   6 #include "fonts.h"
   7 #include "resolution.h"
   8 #include "theme.h"
   9
  10 extern std::map<std::string, std::string> config;
  11 std::map<std::string, FT_Face> faces;
  12
  13 std::vector<std::string> split(const std::string &str, char delim)
  14 {
  15         std::vector<std::string> ret;
  16         std::string s;
  17         for (unsigned i = 0; i < str.size(); ++i) {
  18                 if (str[i] == delim) {
  19                         ret.push_back(s);
  20                         s.clear();
  21                 } else {
  22                         s.push_back(str[i]);
  23                 }
  24         }
  25         if (!s.empty()) {
  26                 ret.push_back(s);
  27         }
  28         return ret;
  29 }
  30
  31 void init_freetype()
  32 {
  33         FT_Library library;
  34         if (FT_Init_FreeType(&library))
  35                 throw std::runtime_error("FreeType init failed.");
  36
  37         // Preload all fonts.
  38         for (std::map<std::string, std::string>::const_iterator it = config.begin();
  39              it != config.end();
  40              ++it) {
  41                 const std::string key = it->first;
  42                 if (key.size() <= 5 || key.substr(key.size() - 5) != ".font") {
  43                         continue;
  44                 }
  45
  46                 std::vector<std::string> font_list = split(it->second, ';');
  47                 for (unsigned i = 0; i < font_list.size(); ++i) {
  48                         if (faces.count(font_list[i])) {
  49                                 // Already preloaded.
  50                                 continue;
  51                         }
  52
  53                         FT_Face face;
  54                         if (FT_New_Face(library, font_list[i].c_str(), 0, &face)) {
  55                                 fprintf(stderr, "Warning: Couldn't open '%s', some glyphs might not be available\n", font_list[i].c_str());
  56                         }
  57                         faces[font_list[i]] = face;
  58                 }
  59         }
  60 }
  61
  62 // this should really be done somehow else :-)
  63 static unsigned screen_width = SCREEN_WIDTH, screen_height = SCREEN_HEIGHT;
  64 void set_screen_size(unsigned width, unsigned height)
  65 {
  66         screen_width = width;
  67         screen_height = height;
  68 }
  69
  70 unsigned my_draw_text(const widestring &str, unsigned char *buf, double size, const std::string &theme_element, int xpos, int ypos)
  71 {
  72         FT_GlyphSlot slot;
  73         int x = 0;
  74
  75         int r = atoi(get_theme_config(theme_element, "red").c_str());
  76         int g = atoi(get_theme_config(theme_element, "green").c_str());
  77         int b = atoi(get_theme_config(theme_element, "blue").c_str());
  78
  79         // Find font faces.
  80         std::vector<FT_Face> fonts;
  81         std::vector<std::string> font_list = split(get_theme_config(theme_element, "font"), ';');
  82         for (unsigned i = 0; i < font_list.size(); ++i) {
  83                 if (faces.count(font_list[i])) {
  84                         fonts.push_back(faces[font_list[i]]);
  85                 }
  86         }
  87
  88         for (std::vector<FT_Face>::const_iterator i = fonts.begin(); i != fonts.end(); ++i) {
  89                 if (FT_Set_Char_Size(*i, 0, unsigned(size * 64.0), 96 * screen_width/LOGICAL_SCREEN_WIDTH, 96 * screen_height/LOGICAL_SCREEN_HEIGHT))
  90                         throw std::runtime_error("Couldn't set font size");
  91         }
  92
  93         // whoop :-P
  94         xpos = xpos * screen_width / LOGICAL_SCREEN_WIDTH;
  95         ypos = ypos * screen_height / LOGICAL_SCREEN_HEIGHT;
  96
  97         for (widestring::const_iterator i = str.begin(); i != str.end(); ++i) {
  98                 int glyph_index;
  99                 for (std::vector<FT_Face>::const_iterator j = fonts.begin(); j != fonts.end(); ++j) {
 100                         glyph_index = FT_Get_Char_Index(*j, *i);
 101                         if (glyph_index == 0)
 102                                 continue;
 103
 104 #if SCREEN_LCD
 105                         if (FT_Load_Glyph(*j, glyph_index, FT_LOAD_RENDER | FT_LOAD_TARGET_LCD))
 106 #else
 107                         if (FT_Load_Glyph(*j, glyph_index, FT_LOAD_RENDER))
 108 #endif
 109                                 throw std::runtime_error("Couldn't load glyph");
 110                         slot = (*j)->glyph;
 111                         break;
 112                 }
 113                 if (glyph_index == 0) {
 114                         std::fprintf(stderr, "Warning: Could not find a glyph in any font for U+%x, ignoring\n", *i);
 115                         continue;
 116                 }
 117
 118                 if (buf != NULL) {
 119                         int y;
 120                         FT_Bitmap *bm = &(slot->bitmap);
 121                         for (y = 0; y < bm->rows; y++) {
 122                                 int xx;
 123                                 int dsty = ypos - slot->bitmap_top + y;
 124                                 if (dsty < 0 || dsty > signed(screen_height-1)) continue;
 125
 126                                 unsigned char *dst = buf + dsty * screen_width*4 + (x + xpos + slot->bitmap_left)*4;
 127 #if SCREEN_LCD
 128                                 unsigned char *src = bm->buffer + y * bm->pitch;
 129                                 int width = (x + xpos + slot->bitmap_left + bm->width/3 >= signed(screen_width)) ? ((screen_width-1) - x - xpos - slot->bitmap_left) : bm->width/3;
 130 #else
 131                                 unsigned char *src = bm->buffer + y * bm->pitch;
 132                                 int width = (x + xpos + slot->bitmap_left + bm->width >= signed(screen_width)) ? ((screen_width-1) - x - xpos - slot->bitmap_left) : bm->width;
 133 #endif
 134
 135 #if SCREEN_LCD
 136                                 for (xx = 0; xx < width; xx++) {
 137                                         *dst = (*dst * (256-src[2]) + b * src[2]) >> 8;
 138                                         ++dst;
 139                                         *dst = (*dst * (256-src[1]) + g * src[1]) >> 8;
 140                                         ++dst;
 141                                         *dst = (*dst * (256-src[0]) + r * src[0]) >> 8;
 142                                         ++dst;
 143                                         *dst++ = 0;
 144
 145                                         src += 3;
 146                                 }
 147 #else
 148                                 for (xx = 0; xx < width; xx++) {
 149                                         *dst = (*dst * (256-*src) + b * *src) >> 8;
 150                                         ++dst;
 151                                         *dst = (*dst * (256-*src) + g * *src) >> 8;
 152                                         ++dst;
 153                                         *dst = (*dst * (256-*src) + r * *src) >> 8;
 154                                         ++dst;
 155                                         *dst++ = 0;
 156                                         ++src;
 157                                 }
 158 #endif
 159                         }
 160                 }
 161
 162                 x += slot->advance.x >> 6;
 163         }
 164
 165         return x * LOGICAL_SCREEN_WIDTH / screen_width;
 166 }
 167
 168 void my_draw_text_deferred(std::vector<TextDefer> &td, const widestring &str, double size, const std::string &theme_element, const std::string &fresh_theme_element, int xpos, int ypos)
 169 {
 170         TextDefer newtd;
 171         newtd.str = str;
 172         newtd.size = size;
 173         newtd.xpos = xpos;
 174         newtd.ypos = ypos;
 175         newtd.theme_element = theme_element;
 176         newtd.fresh_theme_element = fresh_theme_element;
 177         td.push_back(newtd);
 178 }
 179
 180 void draw_all_deferred_text(unsigned char *buf, std::vector<TextDefer> &current, std::vector<TextDefer> &old)
 181 {
 182         for (unsigned i = 0; i < current.size(); ++i) {
 183                 std::string theme_element;
 184                 if (i < old.size() && current[i].str != old[i].str) {
 185                         // changed text
 186                         theme_element = current[i].fresh_theme_element;
 187                 } else {
 188                         theme_element = current[i].theme_element;
 189                 }
 190
 191                 my_draw_text(current[i].str, buf, current[i].size, theme_element, current[i].xpos, current[i].ypos);
 192         }
 193 }
 194