-// $Id$
-//
// SuperTux
// Copyright (C) 2006 Matthias Braun <matze@braunis.de>
+// Ingo Ruhnke <grumbel@gmail.com>
//
-// 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
// 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 <http://www.gnu.org/licenses/>.
#include <config.h>
-#include <cstdlib>
-#include <cstring>
+#include <sstream>
+#include <stdlib.h>
+#include <string.h>
#include <stdexcept>
+#include <SDL_image.h>
+#include <physfs.h>
+#include "lisp/list_iterator.hpp"
#include "lisp/parser.hpp"
-#include "lisp/lisp.hpp"
-#include "screen.hpp"
-#include "font.hpp"
-#include "drawing_context.hpp"
-#include "log.hpp"
-
-Font::Font(const std::string& file, const std::string& shadowfile,
- int w, int h, int shadowsize)
- : chars(0), shadow_chars(0), w(w), h(h), shadowsize(shadowsize)
+#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)
{
- chars = new Surface(file);
- shadow_chars = new Surface(shadowfile);
+ Uint8* pixels = (Uint8*)surface->pixels;
- first_char = 32;
- char_count = ((int) chars->get_height() / h) * 16;
+ 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;
}
-Font::~Font()
+} // 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)
{
- delete chars;
- delete shadow_chars;
+ 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);
}
-float
-Font::get_text_width(const std::string& text) const
+void
+Font::loadFontFile(const std::string &filename)
{
- /** Let's calculate the size of the biggest paragraph */
- std::string::size_type l, hl, ol;
- hl = 0; l = 0;
- while(true)
- {
- ol = l;
- l = text.find("\n", l+1);
- if(l == std::string::npos)
- break;
- if(hl < l-ol)
- hl = l-ol;
+ 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);
+
+ 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<std::string> 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());
+ }
+
+ 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<std::string> &chars,
+ GlyphWidth glyph_width_,
+ int char_width
+ )
+{
+ 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_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(hl == 0)
- hl = text.size();
+ if( col>0 && col <= wrap ) {
+ col = 0;
+ row++;
+ }
+ }
+abort:
- for (unsigned int i = 0; i < text.size(); i++)
- if ((unsigned char) text[i] > 0xC2 && (unsigned char) text[i] < 0xC6)
- hl--; // control characters are a WASTE.
+ if( surface != NULL ) {
+ SDL_UnlockSurface(surface);
+ SDL_FreeSurface(surface);
+ }
+}
- return hl * w;
+Font::~Font()
+{
}
float
-Font::get_text_height(const std::string& text) const
+Font::get_text_width(const std::string& text) const
{
- /** Let's calculate height of the text */
- std::string::size_type l, hh;
- hh = h; l = 0;
- while(true)
+ float curr_width = 0;
+ float last_width = 0;
+
+ for(UTF8Iterator it(text); !it.done(); ++it)
+ {
+ if (*it == '\n')
{
- l = text.find("\n", l+1);
- if(l == std::string::npos)
- break;
- hh += h + 2;
+ last_width = std::max(last_width, curr_width);
+ curr_width = 0;
}
+ else
+ {
+ if( glyphs.at(*it).surface_idx != -1 )
+ curr_width += glyphs[*it].advance;
+ else
+ curr_width += glyphs[0x20].advance;
+ }
+ }
- return hh;
+ return std::max(curr_width, last_width);
}
float
-Font::get_height() const
+Font::get_text_height(const std::string& text) const
{
- return h;
+ 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 text_height;
}
-std::string
-Font::wrap_to_width(const std::string& s, int max_width, std::string* overflow) const
+float
+Font::get_height() const
{
- return wrap_to_chars(s, max_width / w, overflow);
+ return char_height;
}
std::string
return s;
}
-void
-Font::draw(const std::string& text, const Vector& pos_, FontAlignment alignment,
- DrawingEffect drawing_effect, float alpha) const
+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(l > sizeof(temp)-1)
- l = sizeof(temp)-1;
-
- 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);
-
- draw_text(temp, pos + Vector(0,y), drawing_effect, alpha);
+ // if text is already smaller, return full text
+ if (get_text_width(s) <= width) {
+ if (overflow) *overflow = "";
+ return s;
+ }
- i = l+1;
- y += h + 2;
+ // 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);
+ }
}
+
+ // FIXME: hard-wrap at width, taking care of multibyte characters
+ if (overflow) *overflow = "";
+ return s;
}
void
-Font::draw_text(const std::string& text, const Vector& pos,
- DrawingEffect drawing_effect, float alpha) const
+Font::draw(Renderer *renderer, const std::string& text, const Vector& pos_,
+ FontAlignment alignment, DrawingEffect drawing_effect, Color color,
+ float alpha) const
{
- if(shadowsize > 0)
- draw_chars(shadow_chars, text, pos + Vector(shadowsize, shadowsize),
- drawing_effect, alpha);
+ float x = pos_.x;
+ float y = pos_.y;
- draw_chars(chars, text, pos, drawing_effect, alpha);
-}
+ 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);
-namespace {
+ // calculate X positions based on the alignment type
+ Vector pos = Vector(x, y);
-/**
- * returns true if this byte matches a bitmask of 10xx.xxxx, i.e. it is the 2nd, 3rd or 4th byte of a multibyte utf8 string
- */
-bool has_multibyte_mark(unsigned char c) {
- return ((c & 0300) == 0200);
-}
+ if(alignment == ALIGN_CENTER)
+ pos.x -= get_text_width(temp) / 2;
+ else if(alignment == ALIGN_RIGHT)
+ pos.x -= get_text_width(temp);
-/**
- * gets unicode character at byte position @a p of UTF-8 encoded @a text, then advances @a p to the next character.
- * @throws std::runtime_error if decoding fails.
- * See unicode standard section 3.10 table 3-5 and 3-6 for details.
- */
-uint32_t decode_utf8(const std::string& text, size_t& p)
-{
- uint32_t c1 = (unsigned char) text[p+0];
+ // 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<int>(pos.x);
- if (has_multibyte_mark(c1)) std::runtime_error("Malformed utf-8 sequence");
+ draw_text(renderer, temp, pos, drawing_effect, color, alpha);
- if ((c1 & 0200) == 0000) {
- // 0xxx.xxxx: 1 byte sequence
- p+=1;
- return c1;
- }
- else if ((c1 & 0340) == 0300) {
- // 110x.xxxx: 2 byte sequence
- if(p+1 >= text.size()) throw std::range_error("Malformed utf-8 sequence");
- uint32_t c2 = (unsigned char) text[p+1];
- if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence");
- p+=2;
- return (c1 & 0037) << 6 | (c2 & 0077);
- }
- else if ((c1 & 0360) == 0340) {
- // 1110.xxxx: 3 byte sequence
- if(p+2 >= text.size()) throw std::range_error("Malformed utf-8 sequence");
- uint32_t c2 = (unsigned char) text[p+1];
- uint32_t c3 = (unsigned char) text[p+2];
- if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence");
- if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence");
- p+=3;
- return (c1 & 0017) << 12 | (c2 & 0077) << 6 | (c3 & 0077);
- }
- else if ((c1 & 0370) == 0360) {
- // 1111.0xxx: 4 byte sequence
- if(p+3 >= text.size()) throw std::range_error("Malformed utf-8 sequence");
- uint32_t c2 = (unsigned char) text[p+1];
- uint32_t c3 = (unsigned char) text[p+2];
- uint32_t c4 = (unsigned char) text[p+4];
- if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence");
- if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence");
- if (!has_multibyte_mark(c4)) throw std::runtime_error("Malformed utf-8 sequence");
- p+=4;
- return (c1 & 0007) << 18 | (c2 & 0077) << 12 | (c3 & 0077) << 6 | (c4 & 0077);
+ if (i == text.size())
+ break;
+
+ y += char_height + 2;
+ last = i + 1;
+ }
}
- throw std::runtime_error("Malformed utf-8 sequence");
}
+void
+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(renderer, false, rtl ? std::string(text.rbegin(), text.rend()) : text,
+ pos + Vector(shadowsize, shadowsize), drawing_effect, Color(1,1,1), 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,
- DrawingEffect drawing_effect, float alpha) const
+Font::draw_chars(Renderer *renderer, bool notshadow, const std::string& text,
+ const Vector& pos, DrawingEffect drawing_effect, Color color,
+ float alpha) const
{
Vector p = pos;
- size_t i = 0;
- while(i < text.size()) {
- uint32_t c;
- try {
- c = decode_utf8(text, i);
- }
- catch (std::runtime_error) {
- log_debug << "Malformed utf-8 sequence beginning with " << *((uint32_t*)(text.c_str() + i)) << " found " << std::endl;
- c = 0;
- i++;
- }
- ssize_t font_index;
- // a non-printable character?
- if(c == '\n') {
+ for(UTF8Iterator it(text); !it.done(); ++it)
+ {
+ if(*it == '\n')
+ {
p.x = pos.x;
- p.y += h + 2;
- continue;
+ p.y += char_height + 2;
}
- if(c == ' ') {
- p.x += w;
- continue;
+ else if(*it == ' ')
+ {
+ p.x += glyphs[0x20].advance;
}
+ else
+ {
+ Glyph glyph;
+ if( glyphs.at(*it).surface_idx != -1 )
+ glyph = glyphs[*it];
+ else
+ glyph = glyphs[0x20];
- font_index = c - first_char;
- // we don't have the control chars 0x80-0xa0 in the font
- if(c >= 0x80) {
- font_index -= 32;
- if(c <= 0xa0) {
- log_debug << "Unsupported utf-8 character '" << c << "' found" << std::endl;
- font_index = 0;
- }
- }
+ DrawingRequest request;
- if(font_index < 0 || font_index >= (ssize_t) char_count) {
- log_debug << "Unsupported utf-8 character found" << std::endl;
- font_index = 0;
- }
+ request.pos = p + glyph.offset;
+ request.drawing_effect = drawing_effect;
+ request.color = color;
+ request.alpha = alpha;
+
+ 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();
- int source_x = (font_index % 16) * w;
- int source_y = (font_index / 16) * h;
- pchars->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 */
projects / supertux.git / blobdiff