X-Git-Url: https://git.sesse.net/?p=ccbs;a=blobdiff_plain;f=bigscreen%2Fccbs_bigscreen.cpp;h=8e09f0dda132d9465f4060973e928ccf302ef8a6;hp=778720f9e90aa97037dcb67db3ce1dc4acbad52a;hb=e99870759dc603bcce21a792ed30a4b227f11527;hpb=a0588b4cbd8b25d32e958f9f9f8383efdc44683b diff --git a/bigscreen/ccbs_bigscreen.cpp b/bigscreen/ccbs_bigscreen.cpp index 778720f..8e09f0d 100644 --- a/bigscreen/ccbs_bigscreen.cpp +++ b/bigscreen/ccbs_bigscreen.cpp @@ -1,10 +1,249 @@ -#include +#include +#include +#include #include -#include "glwindow.h" +#include +#include +#include FT_FREETYPE_H +#include + +iconv_t ucs4_iconv; + +// UCS-4 string with support for getting from UTF-8 +class widestring : public std::wstring +{ +public: + void operator= (const char *from) + { + unsigned bytes = std::strlen(from); + char *from_buf = strdup(from); + wchar_t *to_buf = new wchar_t[bytes + 1]; + + char *inptr = from_buf, *outptr = reinterpret_cast (to_buf); + + size_t in_left = bytes; + size_t out_left = bytes * sizeof(wchar_t); + + size_t ret = iconv(ucs4_iconv, NULL, NULL, &outptr, &out_left); + if (ret == (size_t)(-1)) { + throw std::runtime_error("Error in iconv during initialization"); + } + + ret = iconv(ucs4_iconv, &inptr, &in_left, &outptr, &out_left); + if (ret == (size_t)(-1)) { + perror("iconv"); + throw std::runtime_error("Error in iconv during conversion"); + } + + erase(begin(), end()); + std::copy(to_buf, reinterpret_cast (outptr), std::back_inserter(*this)); + + free(from_buf); + delete[] to_buf; + } +}; + +template<> +void pqxx::from_string(const char *from, widestring &to) +{ + to = from; +} + +int my_draw_text(const widestring &str, unsigned char *buf, int xpos, int ypos, bool real_render, int r, int g, int b, FT_Face face, FT_Face symbolface); + +class Tournament { +public: + int id; + widestring name; +}; + +Tournament active_tournament; +FT_Face font, symbolfont; + +/* A trigger that sets a flag whenever it's trigged. */ +class FlagTrigger : pqxx::trigger { +private: + bool flag; + +public: + FlagTrigger(pqxx::connection_base &conn, const PGSTD::string &name) + : pqxx::trigger(conn, name), flag(false) {} + virtual ~FlagTrigger() throw () {} + + virtual void operator() (int pid) + { + flag = true; + std::fprintf(stderr, "Received a flag trigger from pid %u\n", pid); + } + + bool get_flag() const + { + return flag; + } + + void reset_flag() + { + flag = false; + } +}; + +/* A transactor that fetches the current tournament and some information about it. */ +class FetchCurrentTournament : public pqxx::transactor<> { +private: + Tournament *tourn; + +public: + FetchCurrentTournament(Tournament *tourn) : tourn(tourn) {} + void operator() (pqxx::transaction<> &t) + { + pqxx::result res( t.exec("SELECT * FROM bigscreen.active_tournament NATURAL JOIN tournaments") ); + try { + pqxx::result::tuple tournament = res.at(0); + + tourn->id = tournament["tournament"].as(tourn->id); + tourn->name = tournament["tournamentname"].as(tourn->name); + } catch (PGSTD::out_of_range &e) { + tourn->id = -1; + tourn->name = ""; + } + } +}; + +void init(pqxx::connection &conn) +{ + conn.perform(FetchCurrentTournament(&active_tournament)); + + if (active_tournament.id == -1) { + std::fprintf(stderr, "No active tournament\n"); + } else { + std::fprintf(stderr, "Current tournament is %d (name: '%s')\n", + active_tournament.id, active_tournament.name.c_str()); + } +} + +unsigned char framebuf[800 * 600 * 4]; + +void main_loop(pqxx::connection &conn) +{ + if (active_tournament.id == -1) { + // No active tournament, sleep a second or so and exit + sleep(1); + return; + } + + memset(framebuf, 0, 800*600*4); + + pqxx::work t(conn, "trx"); + + // fetch all songs + pqxx::result res( t.exec("SELECT * FROM songs WHERE title LIKE 'M%'") ); + unsigned y = 0; + for (pqxx::result::const_iterator i = res.begin(); i != res.end(); ++i) { + my_draw_text(i["title"].as(widestring()), framebuf, 0, y, 1, 255, 255, 255, font, symbolfont); + y += 20; +// std::fprintf(stderr, "%s\n", i["title"].c_str()); + } + t.commit(); + + ptc_update(framebuf); + sleep(1); +} + +void init_freetype() +{ + FT_Library library; + if (FT_Init_FreeType(&library)) + throw std::runtime_error("FreeType init failed."); + if (FT_New_Face(library, "/usr/share/fonts/truetype/msttcorefonts/Georgia.ttf", 0, &font)) + throw std::runtime_error("Face opening failed."); + if (FT_New_Face(library, "/usr/share/fonts/truetype/freefont/FreeSerif.ttf", 0, &symbolfont)) + throw std::runtime_error("Face opening failed."); + if (FT_Set_Char_Size(font, 0, 12 * 64, 96, 96)) + throw std::runtime_error("Size set failed."); + if (FT_Set_Char_Size(symbolfont, 0, 12 * 64, 96, 96)) + throw std::runtime_error("Size set failed."); +} + +int my_draw_text(const widestring &str, unsigned char *buf, int xpos, int ypos, bool real_render, int r, int g, int b, FT_Face face, FT_Face symbolface) +{ + FT_GlyphSlot slot; + int x = 0; + + for (widestring::const_iterator i = str.begin(); i != str.end(); ++i) { + // try the normal font first, fall back if there's some special character + int glyph_index = FT_Get_Char_Index(face, *i); + if (glyph_index == 0) { + std::fprintf(stderr, "Couldn't find U+%x in primary face, falling back to symbol face\n", + *i); + glyph_index = FT_Get_Char_Index(symbolface, *i); + if (glyph_index == 0) { + std::fprintf(stderr, "Couldn't find U+%x in symbol face, ignoring\n", *i); + continue; + } + if (FT_Load_Glyph(symbolface, glyph_index, FT_LOAD_RENDER)) + throw std::runtime_error("Couldn't load glyph from symbol face"); + slot = symbolface->glyph; + } else { + if (FT_Load_Glyph(face, glyph_index, FT_LOAD_RENDER)) + throw std::runtime_error("Couldn't load glyph from primary face"); + slot = face->glyph; + } + + if (real_render) { + int y; + FT_Bitmap *bm = &(slot->bitmap); + for (y = 0; y < bm->rows; y++) { + int xx; + int dsty = ypos - slot->bitmap_top + y; + if (dsty < 0 || dsty > 599) continue; + + unsigned char *dst = buf + dsty * 800*4 + (x + xpos + slot->bitmap_left)*4; + unsigned char *src = bm->buffer + y * bm->width; + for (xx = 0; xx < bm->width; xx++) { + *dst = (*dst * (256-*src) + r * *src) >> 8; + *dst++; + *dst = (*dst * (256-*src) + g * *src) >> 8; + *dst++; + *dst = (*dst * (256-*src) + b * *src) >> 8; + *dst++; + *dst++ = 0; + src++; + } + } + } + + x += slot->advance.x >> 6; + } + + return x; +} + int main(int argc, char **argv) { - GLWindow glw("CCBS bigscreen", 800, 600, 32, false, 16, -1); - sleep(5); + ucs4_iconv = iconv_open("ucs-4le", "utf-8"); // FIXME: will be broken for big endian! + + ptc_open("CCBS bigscreen", 800, 600); + + try { + init_freetype(); + pqxx::connection conn("dbname=ccbs host=altersex.samfundet.no user=ccbs password=GeT|>>B_"); + FlagTrigger tournament_changed(conn, "active_tournament"); + + // when active_tournament is changed, we destroy everything and start from scratch + for ( ;; ) { + tournament_changed.reset_flag(); + init(conn); + do { + main_loop(conn); + conn.get_notifs(); + } while (!tournament_changed.get_flag()); + std::fprintf(stderr, "active_tournament changed, resetting...\n"); + } + } catch (const std::exception &e) { + std::fprintf(stderr, "Exception: %s\n", e.what()); + exit(1); + } + return 0; }