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/*
* File: tilefont.h
* Created by: ennewalker on Sat Jan 5 01:33:53 2008 UTC
*/
#ifndef TILEFONT_H
#define TILEFONT_H
#include "externs.h"
#include "tiletex.h"
// This class handles loading FreeType2 fonts and rendering them via OpenGL.
// TODO enne - Fonts could be made better by:
//
// * handling kerning
// * using SDL_font (maybe?)
// * the possibility of streaming this class in and out so that Crawl doesn't
// have to link against FreeType2 or be forced do as much processing at
// load time.
class FontBuffer;
class VColour;
class formatted_string;
class FTFont
{
public:
FTFont();
virtual ~FTFont();
bool load_font(const char *font_name, unsigned int font_size, bool outline);
// render just text
void render_textblock(unsigned int x, unsigned int y,
unsigned char *chars, unsigned char *colours,
unsigned int width, unsigned int height,
bool drop_shadow = false);
// render text + background box
void render_string(unsigned int x, unsigned int y, const char *text,
const coord_def &min_pos, const coord_def &max_pos,
unsigned char font_colour, bool drop_shadow = false,
unsigned char box_alpha = 0,
unsigned char box_colour = 0, unsigned int outline = 0,
bool tooltip = false);
// FontBuffer helper functions
void store(FontBuffer &buf, float &x, float &y,
const std::string &s, const VColour &c);
void store(FontBuffer &buf, float &x, float &y, const formatted_string &fs);
void store(FontBuffer &buf, float &x, float &y, unsigned char c, const VColour &col);
unsigned int char_width() const { return m_max_advance.x; }
unsigned int char_height() const { return m_max_advance.y; }
unsigned int string_width(const char *text);
unsigned int string_width(const formatted_string &str);
unsigned int string_height(const char *text);
unsigned int string_height(const formatted_string &str);
// Try to split this string to fit in w x h pixel area.
formatted_string split(const formatted_string &str, unsigned int max_width,
unsigned int max_height);
const GenericTexture *font_tex() const { return &m_tex; }
protected:
void store(FontBuffer &buf, float &x, float &y,
const std::string &s, const VColour &c, float orig_x);
void store(FontBuffer &buf, float &x, float &y, const formatted_string &fs,
float orig_x);
int find_index_before_width(const char *str, int max_width);
struct GlyphInfo
{
// offset before drawing glyph; can be negative
char offset;
// per-glyph horizontal advance
char advance;
// per-glyph width
char width;
bool renderable;
};
GlyphInfo *m_glyphs;
// cached value of the maximum advance from m_advance
coord_def m_max_advance;
// minimum offset (likely negative)
int m_min_offset;
GenericTexture m_tex;
};
#endif
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