X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Fvideo%2Ffont.cpp;h=90b32afbf33da80bcffda85a0e248de4797389e0;hb=101b0a78b682a8b6b87407edc625adaf7c51da40;hp=90a319e5b19535920d09cd2dc694c2ec7840f6ea;hpb=df735aa09e4aee204c4004488276df236803f814;p=supertux.git diff --git a/src/video/font.cpp b/src/video/font.cpp index 90a319e5b..90b32afbf 100644 --- a/src/video/font.cpp +++ b/src/video/font.cpp @@ -1,242 +1,451 @@ -// $Id: font.cpp 2298 2005-03-30 12:01:02Z matzebraun $ -// // SuperTux -// Copyright (C) 2004 Tobias Glaesser +// Copyright (C) 2006 Matthias Braun +// Ingo Ruhnke // -// This program is free software; you can redistribute it and/or -// modify it under the terms of the GNU General Public License -// as published by the Free Software Foundation; either version 2 -// of the License, or (at your option) any later version. +// This program is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. // // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. -// +// // You should have received a copy of the GNU General Public License -// along with this program; if not, write to the Free Software -// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA -// 02111-1307, USA. +// along with this program. If not, see . + #include -#include -#include +#include +#include +#include #include +#include +#include + +#include "lisp/list_iterator.hpp" +#include "lisp/parser.hpp" +#include "physfs/physfs_sdl.hpp" +#include "supertux/screen.hpp" +#include "util/file_system.hpp" +#include "util/log.hpp" +#include "util/utf8_iterator.hpp" +#include "video/drawing_context.hpp" +#include "video/drawing_request.hpp" +#include "video/font.hpp" +#include "video/renderer.hpp" + +namespace { + +bool vline_empty(SDL_Surface* surface, int x, int start_y, int end_y, Uint8 threshold) +{ + Uint8* pixels = (Uint8*)surface->pixels; + + for(int y = start_y; y < end_y; ++y) + { + const Uint8& p = pixels[surface->pitch*y + x*surface->format->BytesPerPixel + 3]; + if (p > threshold) + { + return false; + } + } + return true; +} + +} // namespace + +Font::Font(GlyphWidth glyph_width_, + const std::string& filename, + int shadowsize_) : + glyph_width(glyph_width_), + glyph_surfaces(), + shadow_surfaces(), + char_height(), + shadowsize(shadowsize_), + border(0), + rtl(false), + glyphs(65536) +{ + for(unsigned int i=0; i<65536;i++) glyphs[i].surface_idx = -1; + + const std::string fontdir = FileSystem::dirname(filename); + const std::string fontname = FileSystem::basename(filename); + + // scan for prefix-filename in addons search path + char **rc = PHYSFS_enumerateFiles(fontdir.c_str()); + for (char **i = rc; *i != NULL; i++) { + std::string filename_(*i); + if( filename_.rfind(fontname) != std::string::npos ) { + loadFontFile(fontdir + filename_); + } + } + PHYSFS_freeList(rc); +} + +void +Font::loadFontFile(const std::string &filename) +{ + lisp::Parser parser; + log_debug << "Loading font: " << filename << std::endl; + const lisp::Lisp* root = parser.parse(filename); + const lisp::Lisp* config_l = root->get_lisp("supertux-font"); + + if(!config_l) { + std::ostringstream msg; + msg << "Font file:" << filename << ": is not a supertux-font file"; + throw std::runtime_error(msg.str()); + } + + int def_char_width=0; + + if( !config_l->get("glyph-width",def_char_width) ) { + log_warning << "Font:"<< filename << ": misses default glyph-width" << std::endl; + } + + if( !config_l->get("glyph-height",char_height) ) { + std::ostringstream msg; + msg << "Font:" << filename << ": misses glyph-height"; + throw std::runtime_error(msg.str()); + } + + config_l->get("glyph-border", border); + config_l->get("rtl", rtl); -#include "lisp/parser.h" -#include "lisp/lisp.h" -#include "screen.h" -#include "font.h" -#include "drawing_context.h" + lisp::ListIterator iter(config_l); + while(iter.next()) { + const std::string& token = iter.item(); + if( token == "surface" ) { + const lisp::Lisp * glyphs_val = iter.lisp(); + int local_char_width; + bool monospaced; + GlyphWidth local_glyph_width; + std::string glyph_image; + std::string shadow_image; + std::vector chars; + if( ! glyphs_val->get("glyph-width", local_char_width) ) { + local_char_width = def_char_width; + } + if( ! glyphs_val->get("monospace", monospaced ) ) { + local_glyph_width = glyph_width; + } + else { + if( monospaced ) local_glyph_width = FIXED; + else local_glyph_width = VARIABLE; + } + if( ! glyphs_val->get("glyphs", glyph_image) ) { + std::ostringstream msg; + msg << "Font:" << filename << ": missing glyphs image"; + throw std::runtime_error(msg.str()); + } + if( ! glyphs_val->get("shadows", shadow_image) ) { + std::ostringstream msg; + msg << "Font:" << filename << ": missing shadows image"; + throw std::runtime_error(msg.str()); + } + if( ! glyphs_val->get("chars", chars) || chars.size() == 0) { + std::ostringstream msg; + msg << "Font:" << filename << ": missing chars definition"; + throw std::runtime_error(msg.str()); + } -Font::Font(const std::string& file, FontType ntype, int nw, int nh, - int nshadowsize) - : chars(0), shadow_chars(0), type(ntype), w(nw), h(nh), - shadowsize(nshadowsize) + if( local_char_width==0 ) { + std::ostringstream msg; + msg << "Font:" << filename << ": misses glyph-width for some surface"; + throw std::runtime_error(msg.str()); + } + + loadFontSurface(glyph_image, shadow_image, chars, + local_glyph_width, local_char_width); + } + } +} + +void +Font::loadFontSurface( + const std::string &glyphimage, + const std::string &shadowimage, + const std::vector &chars, + GlyphWidth glyph_width_, + int char_width + ) { - chars = new Surface(file, true); - - switch(type) { - case TEXT: - first_char = 32; - break; - case NUM: - first_char = 48; - break; - } - last_char = first_char + (chars->h / h) * 16; - if(last_char > 127 && last_char < 160) // we have left out some control chars at 128-159 - last_char += 32; - - // Load shadow font. - if(shadowsize > 0) { - SDL_Surface* conv = SDL_DisplayFormatAlpha(chars->impl->get_sdl_surface()); - int pixels = conv->w * conv->h; - SDL_LockSurface(conv); - for(int i = 0; i < pixels; ++i) { - Uint32 *p = (Uint32 *)conv->pixels + i; - *p = *p & conv->format->Amask; + SurfacePtr glyph_surface = Surface::create("images/engine/fonts/" + glyphimage); + SurfacePtr shadow_surface = Surface::create("images/engine/fonts/" + shadowimage); + + int surface_idx = glyph_surfaces.size(); + glyph_surfaces.push_back(glyph_surface); + shadow_surfaces.push_back(shadow_surface); + + int row=0, col=0; + int wrap = glyph_surface->get_width() / char_width; + + SDL_Surface *surface = NULL; + + if( glyph_width_ == VARIABLE ) { + //this does not work: + // surface = ((SDL::Texture *)glyph_surface.get_texture())->get_texture(); + surface = IMG_Load_RW(get_physfs_SDLRWops("images/engine/fonts/"+glyphimage), 1); + if(surface == NULL) { + std::ostringstream msg; + msg << "Couldn't load image '" << glyphimage << "' :" << SDL_GetError(); + throw std::runtime_error(msg.str()); } - SDL_UnlockSurface(conv); - SDL_SetAlpha(conv, SDL_SRCALPHA, 128); - shadow_chars = new Surface(conv, true); - SDL_FreeSurface(conv); + SDL_LockSurface(surface); + } + + for( unsigned int i = 0; i < chars.size(); i++) { + for(UTF8Iterator chr(chars[i]); !chr.done(); ++chr) { + int y = row * (char_height + 2*border) + border; + int x = col * (char_width + 2*border) + border; + if( ++col == wrap ) { col=0; row++; } + if( *chr == 0x0020 && glyphs[0x20].surface_idx != -1) continue; + + Glyph glyph; + glyph.surface_idx = surface_idx; + + if( glyph_width_ == FIXED || isdigit(*chr) ) + { + glyph.rect = Rectf(x, y, x + char_width, y + char_height); + glyph.offset = Vector(0, 0); + glyph.advance = char_width; + } + else + { + if (y + char_height > surface->h) + { + log_warning << "error: font definition contains more letter then the images: " << glyphimage << std::endl; + goto abort; + } + + int left = x; + while (left < x + char_width && vline_empty(surface, left, y, y + char_height, 64)) + left += 1; + int right = x + char_width - 1; + while (right > left && vline_empty(surface, right, y, y + char_height, 64)) + right -= 1; + + if (left <= right) + { + glyph.offset = Vector(x-left, 0); + glyph.advance = right - left + 1 + 1; // FIXME: might be useful to make spacing configurable + } + else + { // glyph is completly transparent + glyph.offset = Vector(0, 0); + glyph.advance = char_width + 1; // FIXME: might be useful to make spacing configurable + } + + glyph.rect = Rectf(x, y, x + char_width, y + char_height); + } + + glyphs[*chr] = glyph; + } + if( col>0 && col <= wrap ) { + col = 0; + row++; + } + } +abort: + + if( surface != NULL ) { + SDL_UnlockSurface(surface); + SDL_FreeSurface(surface); } } Font::~Font() { - delete chars; - delete shadow_chars; } float Font::get_text_width(const std::string& text) const { - /** Let's calculate the size of the biggest paragraph */ - std::string::size_type l, hl, ol; - hl = 0; l = 0; - while(true) + float curr_width = 0; + float last_width = 0; + + for(UTF8Iterator it(text); !it.done(); ++it) + { + if (*it == '\n') { - ol = l; - l = text.find("\n", l+1); - if(l == std::string::npos) - break; - if(hl < l-ol) - hl = l-ol; + last_width = std::max(last_width, curr_width); + curr_width = 0; } - if(hl == 0) - hl = text.size(); - - for (uint i = 0; i < text.size(); i++) - if ((unsigned char) text[i] > 0xC2 && (unsigned char) text[i] < 0xC6) - hl--; // control characters are a WASTE. + else + { + if( glyphs.at(*it).surface_idx != -1 ) + curr_width += glyphs[*it].advance; + else + curr_width += glyphs[0x20].advance; + } + } - return hl * w; + return std::max(curr_width, last_width); } float Font::get_text_height(const std::string& text) const { - /** Let's calculate height of the text */ - std::string::size_type l, hh; - hh = h; l = 0; - while(true) - { - l = text.find("\n", l+1); - if(l == std::string::npos) - break; - hh += h + 2; - } + std::string::size_type text_height = char_height; + + for(std::string::const_iterator it = text.begin(); it != text.end(); ++it) + { // since UTF8 multibyte characters are decoded with values + // outside the ASCII range there is no risk of overlapping and + // thus we don't need to decode the utf-8 string + if (*it == '\n') + text_height += char_height + 2; + } - return hh; + return text_height; } float Font::get_height() const { - return h; + return char_height; } -void -Font::draw(const std::string& text, const Vector& pos_, FontAlignment alignment, - uint32_t drawing_effect, uint8_t alpha) const +std::string +Font::wrap_to_chars(const std::string& s, int line_length, std::string* overflow) +{ + // if text is already smaller, return full text + if ((int)s.length() <= line_length) { + if (overflow) *overflow = ""; + return s; + } + + // if we can find a whitespace character to break at, return text up to this character + int i = line_length; + while ((i > 0) && (s[i] != ' ')) i--; + if (i > 0) { + if (overflow) *overflow = s.substr(i+1); + return s.substr(0, i); + } + + // FIXME: wrap at line_length, taking care of multibyte characters + if (overflow) *overflow = ""; + return s; +} + +std::string +Font::wrap_to_width(const std::string& s_, float width, std::string* overflow) { - /* Cut lines changes into seperate strings, needed to support center/right text - alignments with break lines. - Feel free to replace this hack with a more elegant solution - */ - char temp[1024]; - std::string::size_type l, i, y; - bool done = false; - i = y = 0; - - while(!done) { - l = text.find("\n", i); - if(l == std::string::npos) { - l = text.size(); - done = true; + std::string s = s_; + + // if text is already smaller, return full text + if (get_text_width(s) <= width) { + if (overflow) *overflow = ""; + return s; + } + + // if we can find a whitespace character to break at, return text up to this character + for (int i = s.length()-1; i >= 0; i--) { + std::string s2 = s.substr(0,i); + if (s[i] != ' ') continue; + if (get_text_width(s2) <= width) { + if (overflow) *overflow = s.substr(i+1); + return s.substr(0, i); } - - temp[text.copy(temp, l - i, i)] = '\0'; - - // calculate X positions based on the alignment type - Vector pos = Vector(pos_); - if(alignment == CENTER_ALLIGN) - pos.x -= get_text_width(temp) / 2; - else if(alignment == RIGHT_ALLIGN) - pos.x -= get_text_width(temp); + } + + // FIXME: hard-wrap at width, taking care of multibyte characters + if (overflow) *overflow = ""; + return s; +} + +void +Font::draw(Renderer *renderer, const std::string& text, const Vector& pos_, + FontAlignment alignment, DrawingEffect drawing_effect, Color color, + float alpha) const +{ + float x = pos_.x; + float y = pos_.y; + + std::string::size_type last = 0; + for(std::string::size_type i = 0;; ++i) + { + if (text[i] == '\n' || i == text.size()) + { + std::string temp = text.substr(last, i - last); + + // calculate X positions based on the alignment type + Vector pos = Vector(x, y); + + if(alignment == ALIGN_CENTER) + pos.x -= get_text_width(temp) / 2; + else if(alignment == ALIGN_RIGHT) + pos.x -= get_text_width(temp); + + // Cast font position to integer to get a clean drawing result and + // no blurring as we would get with subpixel positions + pos.x = static_cast(pos.x); + + draw_text(renderer, temp, pos, drawing_effect, color, alpha); - draw_text(temp, pos + Vector(0,y), drawing_effect, alpha); + if (i == text.size()) + break; - i = l+1; - y += h + 2; + y += char_height + 2; + last = i + 1; + } } } void -Font::draw_text(const std::string& text, const Vector& pos, - uint32_t drawing_effect, uint8_t alpha) const +Font::draw_text(Renderer *renderer, const std::string& text, const Vector& pos, + DrawingEffect drawing_effect, Color color, float alpha) const { if(shadowsize > 0) - draw_chars(shadow_chars, text, pos + Vector(shadowsize, shadowsize), - drawing_effect, alpha); + draw_chars(renderer, false, rtl ? std::string(text.rbegin(), text.rend()) : text, + pos + Vector(shadowsize, shadowsize), drawing_effect, Color(1,1,1), alpha); - draw_chars(chars, text, pos, drawing_effect, alpha); + draw_chars(renderer, true, rtl ? std::string(text.rbegin(), text.rend()) : text, pos, drawing_effect, color, alpha); } void -Font::draw_chars(Surface* pchars, const std::string& text, const Vector& pos, - uint32_t drawing_effect, uint8_t alpha) const +Font::draw_chars(Renderer *renderer, bool notshadow, const std::string& text, + const Vector& pos, DrawingEffect drawing_effect, Color color, + float alpha) const { - SurfaceImpl* impl = pchars->impl; - int utf8suppl = 0; - Vector p = pos; - for(size_t i = 0; i < text.size(); ++i) { - int c = (unsigned char) text[i]; - int d = 0; - if(c > 127 && c < 160) // correct for the 32 controlchars at 128-159 - c -= 32; - if (c > 0xC2 && text.size() == i+1) // string ends with control char - { - std::cerr << "String \"" << text << "\" is malformed.\n"; - return; - } - else - d = (unsigned char) text[i+1]; - - if (c == 0xC3 && d < 160) // first-byte identifier of U0080 ("C1 Control Characters and Latin-1 Supplement") - { // iso-8859-1 equiv character is capital A with tilde above, signified as "C3 83" in utf-8 - utf8suppl = 64; - continue; - } - else if (c == 0xC3 && d >= 160) // U0080 pt. 2 + + for(UTF8Iterator it(text); !it.done(); ++it) + { + if(*it == '\n') { - utf8suppl = 32; - continue; + p.x = pos.x; + p.y += char_height + 2; } - else if (c == 0xC4 && d < 160) + else if(*it == ' ') { - utf8suppl = 128; - continue; + p.x += glyphs[0x20].advance; } - else if (c == 0xC4 && d >= 160) + else { - utf8suppl = 96; - continue; - } - else if (c == 0xC5 && d < 160) // first-byte identifier of U0100 ("Latin Extended-A") - { // iso-8859-1 equiv character is capital A with ring above, signified as "C3 85" in utf-8 - utf8suppl = 192; - continue; - } - else if (c == 0xC5 && d >= 160) // first-byte identifier of U0100 ("Latin Extended-A") - { // iso-8859-1 equiv character is capital A with ring above, signified as "C3 85" in utf-8 - utf8suppl = 160; - continue; - } - // insert more clauses here once somebody will need them + Glyph glyph; + if( glyphs.at(*it).surface_idx != -1 ) + glyph = glyphs[*it]; + else + glyph = glyphs[0x20]; - // a non-printable character? - if(c == '\n') { - p.x = pos.x; - p.y += h + 2; - continue; - } - if(c == ' ' || c < first_char || c > last_char) { - p.x += w; - continue; - } + DrawingRequest request; + + request.pos = p + glyph.offset; + request.drawing_effect = drawing_effect; + request.color = color; + request.alpha = alpha; - c += utf8suppl; - utf8suppl = 0; - - int index = c - first_char; - int source_x = (index % 16) * w; - int source_y = (index / 16) * h; + SurfacePartRequest surfacepartrequest; + surfacepartrequest.srcrect = glyph.rect; + surfacepartrequest.dstsize = glyph.rect.get_size(); + surfacepartrequest.surface = notshadow ? glyph_surfaces[glyph.surface_idx].get() : shadow_surfaces[glyph.surface_idx].get(); - impl->draw_part(source_x, source_y, p.x, p.y, w, h, alpha, drawing_effect); - p.x += w; + request.request_data = &surfacepartrequest; + renderer->draw_surface_part(request); + + p.x += glyph.advance; + } } } + +/* EOF */