-// $Id: font.cpp 2298 2005-03-30 12:01:02Z matzebraun $
-//
+// $Id$
+//
// SuperTux
-// Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
+// Copyright (C) 2006 Matthias Braun <matze@braunis.de>
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// 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.
+// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+
#include <config.h>
#include <cstdlib>
#include <cstring>
#include <stdexcept>
-#include "lisp/parser.h"
-#include "lisp/lisp.h"
-#include "screen.h"
-#include "font.h"
-#include "drawing_context.h"
+#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, FontType ntype, int nw, int nh,
- int nshadowsize)
- : chars(0), shadow_chars(0), type(ntype), w(nw), h(nh),
- shadowsize(nshadowsize)
+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)
{
- 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) // 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;
- }
- SDL_UnlockSurface(conv);
- SDL_SetAlpha(conv, SDL_SRCALPHA, 128);
- shadow_chars = new Surface(conv, true);
- SDL_FreeSurface(conv);
- }
+ chars = new Surface(file);
+ shadow_chars = new Surface(shadowfile);
+
+ first_char = 32;
+ char_count = ((int) chars->get_height() / h) * 16;
}
Font::~Font()
if(hl == 0)
hl = text.size();
+ 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.
+
return hl * w;
}
return h;
}
+std::string
+Font::wrap_to_width(const std::string& s, int max_width, std::string* overflow) const
+{
+ return wrap_to_chars(s, max_width / w, overflow);
+}
+
+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;
+}
+
void
Font::draw(const std::string& text, const Vector& pos_, FontAlignment alignment,
- uint32_t drawing_effect, uint8_t alpha) const
+ DrawingEffect drawing_effect, float alpha) const
{
/* Cut lines changes into seperate strings, needed to support center/right text
alignments with break lines.
l = text.size();
done = true;
}
-
+
+ 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)
}
void
-Font::draw_text(const std::string& text, const Vector& pos,
- uint32_t drawing_effect, uint8_t alpha) const
+Font::draw_text(const std::string& text, const Vector& pos,
+ DrawingEffect drawing_effect, float alpha) const
{
if(shadowsize > 0)
draw_chars(shadow_chars, text, pos + Vector(shadowsize, shadowsize),
draw_chars(chars, text, pos, drawing_effect, alpha);
}
+namespace {
+
+/**
+ * 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);
+}
+
+/**
+ * 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];
+
+ if (has_multibyte_mark(c1)) std::runtime_error("Malformed utf-8 sequence");
+
+ 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);
+ }
+ throw std::runtime_error("Malformed utf-8 sequence");
+}
+
+}
+
void
Font::draw_chars(Surface* pchars, const std::string& text, const Vector& pos,
- uint32_t drawing_effect, uint8_t alpha) const
+ DrawingEffect drawing_effect, float alpha) const
{
- SurfaceImpl* impl = pchars->impl;
-
Vector p = pos;
- for(size_t i = 0; i < text.size(); ++i) {
- int c = (unsigned char) text[i];
- if(c > 127) // correct for the 32 controlchars at 128-159
- c -= 32;
+ 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') {
p.x = pos.x;
p.y += h + 2;
continue;
}
- if(c == ' ' || c < first_char || c > last_char) {
+ if(c == ' ') {
p.x += w;
continue;
}
-
- int index = c - first_char;
- int source_x = (index % 16) * w;
- int source_y = (index / 16) * h;
- impl->draw_part(source_x, source_y, p.x, p.y, w, h, alpha, drawing_effect);
+ 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;
+ }
+ }
+
+ if(font_index < 0 || font_index >= (ssize_t) char_count) {
+ log_debug << "Unsupported utf-8 character found" << std::endl;
+ font_index = 0;
+ }
+
+ 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;
}
}
projects / supertux.git / blobdiff