-// $Id: font.cpp 2298 2005-03-30 12:01:02Z matzebraun $
-//
// SuperTux
-// Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
+// 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
// 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 <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 "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<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());
+ }
-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<std::string> &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<int>(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 */
projects / supertux.git / blobdiff